CN112399622A

CN112399622A - Control information sending and receiving method and communication device

Info

Publication number: CN112399622A
Application number: CN201910772054.2A
Authority: CN
Inventors: 温容慧; 黎超; 张兴炜
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2021-02-23
Anticipated expiration: 2039-08-16
Also published as: CN112399622B; WO2021031970A1

Abstract

The application provides a control information sending and receiving method and a communication device, which are suitable for scenes such as V2X, Internet of vehicles, intelligent Internet of vehicles, automatic driving and the like. The first terminal device receives downlink control information indicating a time unit offset K from the network device at a first time T1. This time unit offset K is the time unit offset of the first time unit of the first side line data transmitted by the first terminal device with respect to the second time unit at the first time T1. The first terminal device determines the second time T2 according to the time unit offset K, the first time T1, and the first threshold TH1, and transmits the first sidelink data to the second terminal device at the second time T2. By adopting the embodiment of the application, the time domain resources scheduled by the network device can be more reasonable, the interference between different communication links caused by unreasonable scheduling of the time domain resources is reduced, and the applicability and the practicability of the mobile communication system can be improved.

Description

Control information sending and receiving method and communication device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and a communications apparatus for sending and receiving control information.

Background

With the continuous development of mobile communication technology, the fifth generation (the 5th generation, 5G) mobile communication system has been developed in order to cope with the explosive mobile data traffic increase, the connection of mass mobile communication devices, and the various new services and application scenarios that are continuously emerging in the future. With the improvement of the practicability of the 5G mobile communication system and the continuous popularization of the corresponding devices, how to implement the cooperative scheduling of the communication resources between the 5G mobile communication system and the mobile communication systems that have already been applied in the fourth generation (4G) mobile communication system, the third generation (3G) mobile communication system, and the like, becomes a current research hotspot.

In these mobile communication systems that have been applied to maturity, after a terminal device initiates a time domain resource scheduling request to a network device due to a service requirement, the network device may determine, according to a preset resource control parameter and a resource configuration rule, a time domain resource required by the terminal device for performing a corresponding service, and then send the time domain resource to the terminal device through control information such as downlink control information or radio resource control information. For communication systems that have been well-developed and applied in 4G mobile communication systems or 3G mobile communication systems, a series of resource control parameters and resource configuration rules for time domain resource configuration already exist in the prior art, so that network devices can reasonably configure corresponding time domain resources for terminal devices. However, since the 5G mobile communication system and the mobile communication systems that have already been well-developed have great differences in subframe timing, subcarrier spacing, etc., the resource control parameters and resource configuration rules used by the mobile communication systems that have been well-developed are not suitable for scheduling of time domain resources within the 5G mobile communication system or between the 5G mobile communication system and the mobile communication systems that have been well-developed.

Disclosure of Invention

Embodiments of the present application provide a method and a communication device for sending and receiving control information, so that a network device can accurately schedule time domain resources for a terminal device in the same or different mobile communication systems, interference between different communication links due to unreasonable scheduling of the time domain resources is reduced, and applicability and practicability of the mobile communication systems can be improved.

In a first aspect, an embodiment of the present application provides a method for receiving control information. The first terminal device of the second network system receives the downlink control information from the network device of the first network system at a first time T1. Here, the downlink control information is used to schedule the first side row data. The downlink control information is used to indicate a time unit offset K, which is a time unit offset of a first time unit in which the first terminal device transmits the first sidelink data, relative to a second time unit at the first time T1. The first terminal device determines a second time T2 at which the first terminal device transmits the first sidelink data, based on the time unit offset K, the first time T1, and the first threshold TH 1. Here, T2 ≧ (T1+ TH 1). The first terminal device transmits the first sidelink data to the second terminal device at the second time T2.

In the control information receiving method, the time unit offset K is determined by the network device under the condition of fully considering one or more of the factors such as the specific position of the downlink control information in the second time unit, the specific position of the first side row data in the first time unit, the subframe timing deviation, the length of the downlink control information and the like, so that the first terminal device can be ensured to have enough time to perform operations such as processing of the downlink control information, preparation of the side row data and the like, the interference between different communication links caused by unreasonable time domain resource scheduling can be reduced, and the applicability and the practicability of the mobile communication system are improved.

With reference to the first aspect, in a possible implementation manner, the first threshold TH1 is determined according to a processing time t1 when the first terminal device processes the downlink control information, a preparation time t2 of the first side row data of the first terminal device, a transition time t3 of the downlink control information between the first network format and the second network format, and a timing advance t4 between uplink and downlink between the first terminal device and the network device. Alternatively, the first threshold TH1 is predefined. Since the network device and the first terminal device belong to different network systems, when determining the shortest time required by the first terminal device from receiving the downlink control information to being ready to send the first sidelink data, the switching time of the downlink control information between different network systems should be considered, so that the situation that the first terminal device has insufficient time to perform operations such as processing the downlink control information and preparing the sidelink data can be avoided.

With reference to the first aspect, in a possible implementation manner, a first subcarrier spacing of a downlink between the network device and the first terminal device is the same as a second subcarrier spacing of a link where the first terminal device transmits the first side data. The above-described second timing T2 satisfies the following equation:

here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz. μ 1 and μ 2 are each a positive integer greater than or equal to 0, and μ 1 ═ μ 2. S_DCIA sequence number, L, of a first symbol of the one or more symbols occupied by the downlink control information_DCIThe number of symbols occupied by the downlink control information,

the number of symbols occupied by the second time unit. In the process of determining the time unit offset K, the influence factor of the position of the downlink control information in the second time unit is fully considered, so that the first terminal device can be ensured to have enough time to perform operations such as processing of the downlink control information, preparation of sidestream data and the like. The method reduces the inter-link interference caused by unreasonable time domain resource scheduling in the mobile communication system, and can improve the applicability and the practicability of the mobile communication system.

With reference to the first aspect, in a possible implementation manner, a first subcarrier spacing of a downlink between the network device and the first terminal device is different from a second subcarrier spacing of a link where the first terminal device transmits the first sidelink data. The above-described second timing T2 satisfies the following equation:

here, the granularity of the time unit offset K is the time unit of the downlink, and the granularity of the time unit offset K1 is the time unit of the link through which the first terminal device transmits the first sidelink data. The first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz. Mu.1 and mu.2 are both positive integers greater than or equal to 0, and mu.1 ≠ mu.2. S_DCIA sequence number, L, of a first symbol of the one or more symbols occupied by the downlink control information_DCIThe number of symbols occupied by the downlink control information. In the process of determining the time unit offset K, the influence factors of the position of the downlink control information in the second time unit and the subframe timing deviation are fully considered, so that the first terminal device can be ensured to have enough time to perform operations such as processing of the downlink control information, preparation of sidestream data and the like. The method reduces the inter-link interference caused by unreasonable time domain resource scheduling in the mobile communication system, and can improve the applicability and the practicability of the mobile communication system.

With reference to the first aspect, in one possible implementation manner, a first subcarrier spacing of a downlink between the network device and the first terminal device is the same as a second subcarrier spacing corresponding to a link where the first terminal device transmits the first side data. The above-described second timing T2 satisfies the following equation:

here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ═ mu 2, L_DCIThe number of symbols occupied by the downlink control information, S_dataThe serial number of the first symbol in the one or more symbols occupied by the first side row data,

the number of symbols occupied by the second time unit. In the process of determining the time unit offset K, the factors such as the length of the downlink control information and the specific position of the first sidelink data in the second time unit are fully considered, so that the first terminal device can be ensured to have enough time to perform operations such as processing of the downlink control information and preparation of the sidelink data. The method reduces the inter-link interference caused by unreasonable time domain resource scheduling in the mobile communication system, and can improve the applicability and the practicability of the mobile communication system.

here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz. Mu.1 and mu.2 are both positive integers greater than or equal to 0, and mu.1 ≠ mu.2. S_dataFor the first side row data stationThe sequence number of the first of the occupied one or more symbols,

the number of symbols occupied by the second time unit. The granularity of the time unit offset K is the time unit of the downlink, and the granularity of the time unit offset K1 is the time unit of the link through which the first terminal device transmits the first sidelink data. In the process of determining the time unit offset K, the factors such as the length of the downlink control information, the subframe timing deviation, the specific position of the first sidelink data in the second time unit and the like are fully considered, so that the first terminal device can be ensured to have enough time to perform operations such as processing of the downlink control information, preparation of the sidelink data and the like. The method reduces the inter-link interference caused by unreasonable time domain resource scheduling in the mobile communication system, and can improve the applicability and the practicability of the mobile communication system.

In a second aspect, an embodiment of the present application provides a method for sending control information. The network device of the first network system determines the second time T2 at which the first terminal device transmits the first sidelink data, based on the first threshold TH1 and the first time T1 at which the network device is to transmit downlink control information to the first terminal device. Here, T2 ≧ T1+ TH 1. The network device determines a time unit offset K based on the first time T2 and the second time T2. Here, the time unit offset K is a time unit offset of a first time unit in which the first terminal device transmits the first sidelink data with respect to a second time unit at the first time T1. The network device transmits downlink control information to the first terminal device of the second network scheme at the first time T1. Here, the downlink control information indicates the time unit offset K.

In the control information sending method, the time unit offset K is determined by the network device under the condition of fully considering one or more factors of the specific position of the downlink control information in the second time unit, the specific position of the first side row data in the first time unit, the subframe timing deviation, the length of the downlink control information and the like, so that the first terminal device can be ensured to have enough time to carry out operations such as processing of the downlink control information, preparation of the side row data and the like, the interference between different communication links caused by unreasonable time domain resource scheduling can be reduced, and the applicability and the practicability of the mobile communication system are improved.

With reference to the second aspect, in a possible implementation manner, the first threshold TH1 is determined according to a processing time t1 when the first terminal device processes the downlink control information, a preparation time t2 of the first side row data of the first terminal device, a transition time t3 of the downlink control information between the first network format and the second network format, and a timing advance t4 between uplink and downlink between the first terminal device and the network device. Alternatively, the first threshold TH1 is predefined. Since the network device and the first terminal device belong to different network systems, when determining the shortest time required by the first terminal device from receiving the downlink control information to being ready to send the first sidelink data, the switching time of the downlink control information between different network systems should be considered, so that the situation that the first terminal device has insufficient time to perform operations such as processing the downlink control information and preparing the sidelink data can be avoided.

With reference to the second aspect, in a possible implementation manner, the first subcarrier spacing of the downlink between the network device and the first terminal device is the same as the second subcarrier spacing of the link where the first terminal device transmits the first side data. The above-described second timing T2 satisfies the following equation:

Here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz. μ 1 and μ 2 are each a positive integer greater than or equal to 0, μ 1 ═ μ 2, S_DCIA sequence number, L, of a first symbol of the one or more symbols occupied by the downlink control information_DCIThe number of symbols occupied by the downlink control information,

the number of symbols occupied by the second time unit. The specific position of the downlink control information in the time unit and the factors such as the subframe timing deviation caused by different subcarrier intervals are fully considered in the process of determining the offset K of the time unit, so that the unit offset K determined by the network device is more reasonable, the first terminal device can be ensured to normally transmit the side data on the communication resources configured by the network device, the inter-link interference caused by unreasonable time domain resource scheduling in a mobile communication system is reduced, and the applicability and the practicability of the mobile communication system can be improved.

With reference to the second aspect, in a possible implementation manner, a first subcarrier spacing of a downlink between the network apparatus and the first terminal apparatus is different from a second subcarrier spacing of a link where the first terminal apparatus transmits the first sidelink data. The above-described second timing T2 satisfies the following equation:

Here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz. Mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ≠ mu 2, S_DCIA sequence number, L, of a first symbol of the one or more symbols occupied by the downlink control information_DCIThe number of symbols occupied by the downlink control information. The granularity of the time unit offset K is the time unit of the downlink, and the granularity of the time unit offset K1 is the time unit of the link through which the first terminal device transmits the first sidelink data. In thatThe specific position of the downlink control information in the time unit and the factors such as the subframe timing deviation caused by different subcarrier intervals are fully considered in the process of determining the time unit offset K, so that the unit offset K determined by the network device is more reasonable, the first terminal device can be ensured to normally transmit the side data on the communication resources configured by the network device, the inter-link interference caused by unreasonable time domain resource scheduling in the mobile communication system is reduced, and the applicability and the practicability of the mobile communication system can be improved.

With reference to the second aspect, in one possible implementation manner, a first subcarrier spacing of a downlink between the network apparatus and the first terminal apparatus is the same as a second subcarrier spacing corresponding to a link where the first terminal apparatus transmits the first uplink data, and the second time T2 satisfies the following formula:

Wherein the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz. μ 1 and μ 2 are each a positive integer greater than or equal to 0, and μ 1 ═ μ 2. L is_DCIThe number of symbols occupied by the downlink control information, S_dataThe serial number of the first symbol in the one or more symbols occupied by the first side row data,

the number of symbols occupied by the second time unit. The network equipment fully considers factors such as specific position of first side data in a time unit, length of downlink control information and the like in the process of determining the time unit offset K, so that the determined unit offset K is more reasonable, the first terminal device can be ensured to normally transmit the side data on communication resources configured by the network device, the inter-link interference caused by unreasonable time domain resource scheduling in a mobile communication system is reduced, and the mobile communication system can be improvedApplicability and practicality of the communication system.

Here, the granularity of the time unit offset K is the time unit of the downlink, and the granularity of the time unit offset K1 is the time unit of the link through which the first terminal device transmits the first sidelink data. The first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz. Mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ≠ mu 2, S_dataThe serial number L of the first symbol in one or more symbols occupied by the first side row data_DCIThe number of symbols occupied by the downlink control information,

the number of symbols occupied by the second time unit. The network device fully considers factors such as specific position of first side data in a time unit, subframe timing deviation, length of downlink control information and the like in the process of determining the time unit offset K, so that the determined unit offset K is more reasonable, the first terminal device can be ensured to normally transmit the side data on communication resources configured by the network device, the inter-link interference caused by unreasonable time domain resource scheduling in a mobile communication system is reduced, and the applicability and the practicability of the mobile communication system can be improved.

In a third aspect, a method of receiving control information is provided. The first terminal device of the second network system receives, at a first time T1, radio resource control information from the network device of the first network system, where the radio resource control information is used to schedule the first sidelink data, and the radio resource control information is used to indicate a time unit offset K, where the time unit offset K is a time unit offset of a first time unit, where the first terminal device transmits the first sidelink data, relative to a reference time unit. The first terminal device determines a second time T2 at which the first terminal device transmits the first sidelink data, based on the time cell offset K, the first time T1, and a first threshold TH 1. Here, T2 ≧ (T1+ TH 1). The first terminal device transmits the first sidelink data to the second terminal device at the second time T2.

In the control information receiving method, the time unit offset K is determined by the network device under the condition of fully considering one or more factors of the specific position of the radio resource control information in the second time unit, the specific position of the first side row data in the first time unit, the subframe timing deviation, the length of the radio resource control information and the like, so that the first terminal device can be ensured to have enough time to carry out operations such as processing of the radio resource control information, preparation of the side row data and the like, the interference among different communication links caused by unreasonable time domain resource scheduling can be reduced, and the applicability and the practicability of the mobile communication system are improved.

With reference to the third aspect, in a possible implementation manner, the first threshold TH1 is determined according to a processing time t1 when the first terminal device processes the radio resource control information, a preparation time t2 of the first side row data of the first terminal device, a transition time t3 of the radio resource control information between the first network format and the second network format, and a timing advance t4 between uplink and downlink between the first terminal device and the network device. Alternatively, the first threshold TH1 is predefined.

With reference to the third aspect, in a possible implementation manner, the first subcarrier spacing of the downlink between the network apparatus and the first terminal apparatus is the same as the second subcarrier spacing of the link where the first terminal apparatus transmits the first side data. The above-described second timing T2 satisfies the following equation:

here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz. μ 1 and μ 2 are each a positive integer greater than or equal to 0, μ 1 ═ μ 2, S_RRCA sequence number of a first symbol in the one or more symbols occupied by the rrc message, n is a corresponding sequence number of a second time unit in the downlink where the first time T1 is located, L _RRCThe number of symbols occupied by the radio resource control information,

the number of symbols occupied by the second time unit. Here, the time unit offset K is determined by the network device in consideration of the specific location of the radio resource control information in the second time unit, the length of the radio resource control information, and other factors, so that the first terminal device can be guaranteed to have enough time to perform operations such as processing of the radio resource control information and preparation of sidestream data, interference between different communication links due to unreasonable time domain resource scheduling can be reduced, and applicability and practicability of the mobile communication system are improved.

With reference to the third aspect, in a possible implementation manner, a first subcarrier spacing of a downlink between the network apparatus and the first terminal apparatus is different from a second subcarrier spacing of a link where the terminal apparatus transmits the first sidelink data. The above-described second timing T2 satisfies the following equation:

here, the granularity of the time unit offset K is the time unit of the downlink, and the granularity of the time unit offset K1 is the time unit of the link through which the first terminal device transmits the first sidelink data. The first subcarrier spacing is (15 × 2) ^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz. Mu.1 and mu.2 are both positive integers greater than or equal to 0, and mu.1 ≠ mu.2. S_RRCA sequence number, L, of a first symbol of the one or more symbols occupied by the RRC message_RRCN is a corresponding sequence number of the downlink of the second time unit at the first time T1, which is the number of the symbols occupied by the RRC message,

t5 is the subframe timing offset between the downlink and the link on which the first side row data is transmitted by the first terminal device, which is the number of symbols occupied by the second time cell. Here, the time unit offset K is determined by the network device in consideration of the specific location of the radio resource control information in the second time unit, the length of the radio resource control information, the subframe timing offset, and other factors, so that the first terminal device can be guaranteed to have enough time to perform operations such as processing the radio resource control information and preparing sidestream data, interference between different communication links due to unreasonable time domain resource scheduling can be reduced, and the applicability and practicability of the mobile communication system are improved.

here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz. μ 1 and μ 2 are positive integers greater than or equal to 0, μ 1 ═ μ 2, S_dataThe serial number L of the first symbol in one or more symbols occupied by the first side row data_RRCN is a corresponding sequence number of the downlink of the second time unit at the first time T1, which is the number of the symbols occupied by the RRC message,

the number of symbols occupied by the second time unit. Here, the time unit offset K is determined by the network device in consideration of the length of the radio resource control information, the specific position of the first sidelink data in the first time unit, and other factors, so that the first terminal device can be guaranteed to have enough time to perform operations such as processing the radio resource control information and preparing the sidelink data, interference between different communication links due to unreasonable time domain resource scheduling can be reduced, and applicability and practicability of the mobile communication system are improved.

With reference to the third aspect, in a possible implementation manner, a first subcarrier spacing of a downlink between the network apparatus and the first terminal apparatus is different from a second subcarrier spacing of a link where the first terminal apparatus transmits the first sidelink data. The above-described second timing T2 satisfies the following equation:

here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz. μ 1 and μ 2 are positive integers greater than or equal to 0, μ 1 ≠ μ 2. S_dataThe serial number L of the first symbol in one or more symbols occupied by the first side row data_RRCN is a corresponding sequence number of the downlink of the second time unit at the first time T1, which is the number of the symbols occupied by the RRC message,

t5 is the subframe timing offset between the downlink and the link on which the first side row data is transmitted by the first terminal device, which is the number of symbols occupied by the second time cell. Here, the time unit offset K is determined by the network device in consideration of the length of the radio resource control information, the specific position of the first sidelink data in the first time unit, the subframe timing offset, and other factors, so that the first terminal device can be guaranteed to have enough time to perform operations such as processing the radio resource control information and preparing the sidelink data, interference between different communication links due to unreasonable time domain resource scheduling can be reduced, and applicability and practicability of the mobile communication system are improved.

In a fourth aspect, a method of transmitting control information is provided. The network device of the first network system determines the second time T2 at which the first terminal device transmits the first sidelink data, based on the first threshold TH1 and the first time T1 at which it is going to transmit the radio resource control information to the first terminal device. Here, T2 ≧ (T1+ TH 1). The network device determines a time unit offset K according to the first time T1 and the second time T2. Here, the time unit offset K is a time unit offset of a first time unit in which the first terminal device transmits the first side row data with respect to a reference time unit. The network device transmits, at the first time T1, radio resource control information indicating the time unit offset K to the first terminal device of the second network type.

In the control information sending method, the time unit offset K is determined by the network device under the condition of fully considering one or more factors of the specific position of the radio resource control information in the second time unit, the specific position of the first side row data in the first time unit, the subframe timing deviation, the length of the radio resource control information and the like, so that the first terminal device can be ensured to have enough time to carry out operations such as processing of the radio resource control information, preparation of the side row data and the like, the interference among different communication links caused by unreasonable time domain resource scheduling can be reduced, and the applicability and the practicability of the mobile communication system are improved.

With reference to the fourth aspect, in a possible implementation manner, the first threshold TH1 is determined according to a processing time t1 when the first terminal device processes the radio resource control information, a preparation time t2 of the first side row data of the first terminal device, a transition time t3 of the downlink control information between the first network format and the second network format, and a timing advance t4 between uplink and downlink between the first terminal device and the network device. Alternatively, the first threshold TH1 is predefined.

With reference to the fourth aspect, in a possible implementation manner, a first subcarrier spacing of a downlink between the network apparatus and the first terminal apparatus is the same as a second subcarrier spacing of a link where the terminal apparatus transmits the first side data. The above-described second timing T2 satisfies the following equation:

here, the first subcarrier spacing is (15 × 2)^μ1) Khz, second subcarrier spacing of (15 × 2)^μ2) Khz. μ 1 and μ 2 are each a positive integer greater than or equal to 0, and μ 1 ═ μ 2. S_RRCThe sequence number of the first symbol in the one or more symbols occupied by the radio resource control information. n is the corresponding sequence number of the second time unit in the downlink where the first time T1 is located, L _RRCThe number of symbols occupied by the radio resource control information,

the number of symbols occupied by the second time unit. The network equipment fully considers factors such as the specific position of the radio resource control information in the second time unit, the length of the radio resource control information and the like in the process of determining the time unit offset K, so that the determined unit offset K is more reasonable, the first terminal device can be ensured to normally transmit side data on communication resources configured by the network device, the inter-link interference caused by unreasonable time domain resource scheduling in a mobile communication system is reduced, and the applicability and the practicability of the mobile communication system can be improved.

With reference to the fourth aspect, in a possible implementation manner, a first subcarrier spacing of a downlink between the network apparatus and the first terminal apparatus is different from a second subcarrier spacing of a link where the terminal apparatus transmits the first side data. The above-described second timing T2 satisfies the following equation:

here, the granularity of the time unit offset K is the time unit of the downlink, and the granularity of the time unit offset K1 is the time unit of the link through which the first terminal device transmits the first sidelink data. The first subcarrier spacing is (15 × 2) ^μ1) Khz, the interval of the second sub-carrier is positive integer of more than or equal to 0 for both mu 1 and mu 2, mu 1 is not equal to mu 2. S_RRCA sequence number, L, of a first symbol of the one or more symbols occupied by the RRC message_RRCN is a corresponding sequence number of the downlink of the second time unit at the first time T1, which is the number of the symbols occupied by the RRC message,

t5 is the subframe timing offset between the downlink and the link on which the first side row data is transmitted by the first terminal device, which is the number of symbols occupied by the second time cell. The network equipment fully considers factors such as specific position of the radio resource control information in the second time unit, subframe timing deviation, length of the radio resource control information and the like in the process of determining the time unit offset K, so that the determined unit offset K is more reasonable, the first terminal device can be ensured to normally transmit side data on communication resources configured by the network device, the inter-link interference caused by unreasonable time domain resource scheduling in a mobile communication system is reduced, and the applicability and the practicability of the mobile communication system can be improved.

With reference to the fourth aspect, in a possible implementation manner, the first subcarrier spacing of the downlink between the network device and the first terminal device is the same as the second subcarrier spacing of the link where the first terminal device transmits the first side data. The above-described second timing T2 satisfies the following equation:

here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz, μ 1 and μ 2 are positive integers greater than or equal to 0, and μ 1 ═ μ 2. S_dataThe serial number L of the first symbol in one or more symbols occupied by the first side row data_RRCN is a corresponding sequence number of the downlink of the second time unit at the first time T1, which is the number of the symbols occupied by the RRC message,

the number of symbols occupied by the second time unit. The network equipment fully considers the specific position of the first side row data in the first time unit and the radio resource control information in the process of determining the time unit offset KThe length and other factors, so that the determined unit offset K is more reasonable, the first terminal device can be ensured to normally transmit the side data on the communication resource configured by the network device, the inter-link interference caused by unreasonable time domain resource scheduling in the mobile communication system is reduced, and the applicability and the practicability of the mobile communication system can be improved.

With reference to the fourth aspect, in a possible implementation manner, a first subcarrier spacing of a downlink between the network apparatus and the first terminal apparatus is different from a second subcarrier spacing of a link where the first terminal apparatus transmits the first sidelink data. The above-described second timing T2 satisfies the following equation:

here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ≠ mu 2, S_dataThe serial number L of the first symbol in one or more symbols occupied by the first side row data_RRCN is a corresponding sequence number of the downlink of the second time unit at the first time T1, which is the number of the symbols occupied by the RRC message,

t5 is the subframe timing offset between the downlink and the link on which the first side row data is transmitted by the first terminal device, which is the number of symbols occupied by the second time cell. The network equipment fully considers factors such as specific position of first side data in the first time unit, subframe timing deviation, length of radio resource control information and the like in the process of determining the time unit offset K, so that the determined unit offset K is more reasonable, the first terminal device can be ensured to normally transmit the side data on communication resources configured by the network device, and the number of side data transmitted in a mobile communication system is reduced The applicability and practicability of the mobile communication system can be improved due to the inter-link interference caused by unreasonable time domain resource scheduling.

In a fifth aspect, a method for receiving control information is provided. The first terminal device receives downlink control information for scheduling the first sidelink data from the network device at a first time T1. Here, the downlink control information is used to indicate a time unit offset K, where the time unit offset K is a time unit offset of a first time unit for transmitting the first side row data by the first terminal device with respect to a second time unit corresponding to the first time T1. The first terminal device determines a second time T2 at which the first terminal device transmits the first sidelink data, based on the time cell offset K, the first time T1, and a first threshold TH 1. Here, T2 ≧ (T1+ TH 1). The first terminal device transmits the first sidelink data to the second terminal device at the second time T2. The network system of the network device is the same as that of the first terminal device.

With reference to the fifth aspect, in one possible implementation manner, the first threshold TH1 is determined according to a processing time t1 when the first terminal device processes the downlink control information, a preparation time t2 of the first side row data of the first terminal device, and a timing advance t3 between uplink and downlink between the first terminal device and the network device. Alternatively, the first threshold TH1 is predefined.

With reference to the fifth aspect, in a possible implementation manner, a first subcarrier spacing of a downlink between the network apparatus and the first terminal apparatus is the same as a second subcarrier spacing of a link where the first terminal apparatus transmits the first sidelink data, and the second time T2 satisfies the following formula:

here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2)Khz。μ1＝μ2＝0。S_DCIA sequence number, L, of a first symbol of the one or more symbols occupied by the downlink control information_DCIThe number of symbols occupied by the downlink control information,

the number of symbols occupied by said second time unit, S_dataThe serial number of the first symbol in the one or more symbols occupied by the first side row data is used. Here, the time unit offset K is determined by the network device under the condition of fully considering the factors such as the length of the downlink control information, the specific position of the downlink control information in the second unit, the specific position of the first side row data in the first time unit, and the like, so that the first terminal device can be ensured to have enough time to perform operations such as processing of the radio resource control information and preparation of the side row data, the interference between different communication links caused by unreasonable time domain resource scheduling can be reduced, and the applicability and the practicability of the mobile communication system are improved.

With reference to the fifth aspect, in a possible implementation manner, a first subcarrier spacing of a downlink between the network apparatus and the first terminal apparatus is different from a second subcarrier spacing of a link where the first terminal apparatus transmits the first sidelink data, and the second time T2 satisfies the following formula:

here, the granularity of the time unit offset K is the time unit of the downlink, and the granularity of the time unit offset K1 is the time unit of the link through which the first terminal device transmits the first sidelink data. The first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz. μ 1 is a positive integer greater than 0, and μ 2 ═ 0. S_DCIA sequence number, L, of a first symbol of the one or more symbols occupied by the downlink control information_DCIN is a corresponding sequence number of the second time unit in a downlink between the network device and the first terminal device, and S is the number of symbols occupied by the downlink control information_dataThe serial number of the first symbol in the one or more symbols occupied by the first side row data is used. Here, the time unit offset K is determined by the network device under the condition of fully considering the factors such as the length of the downlink control information, the specific position of the downlink control information in the second unit, the subframe timing offset, the specific position of the first side row data in the first time unit, and the like, so that the first terminal device can be ensured to have enough time to perform operations such as processing of the radio resource control information and preparation of the side row data, the interference between different communication links caused by unreasonable time domain resource scheduling can be reduced, and the applicability and the practicability of the mobile communication system are improved.

In a sixth aspect, a method of transmitting control information is provided. The network device determines a first threshold TH1, and determines a second time T2 at which the first terminal device transmits the first sidelink data, based on the first threshold TH1 and a first time T1 at which the first terminal device transmits the radio resource control information. Here, T2 ≧ (T1+ TH 1). The network device determines the time unit offset K according to the second time T2. Here, the time unit offset K is a time unit offset of a first time unit of the first side line data transmitted by the first terminal device with respect to a second time unit of the first time T1. The network device transmits, to the first terminal device, radio resource control information indicating the time unit offset K at the first time T1.

With reference to the sixth aspect, in a possible implementation manner, the first threshold TH1 is determined according to a processing time t1 when the first terminal device processes the radio resource control information, a preparation time t2 of the first side row data of the first terminal device, and a timing advance t3 between uplink and downlink between the first terminal device and the network device. Alternatively, the first threshold TH1 is predefined.

With reference to the sixth aspect, in a possible implementation manner, the first subcarrier spacing of the downlink between the network device and the first terminal device is the same as the second subcarrier spacing of the link where the first terminal device transmits the first side data. The above-described second timing T2 satisfies the following equation:

here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2)Khz。μ1＝μ2＝0，S_DCIA sequence number, L, of a first symbol of the one or more symbols occupied by the downlink control information_DCIThe number of symbols occupied by the downlink control information,

the number of symbols occupied by said second time unit, S_dataThe serial number of the first symbol in the one or more symbols occupied by the first side row data is used. The network equipment fully considers the specific position of the first side row data in the first time unit and downlink control in the process of determining the time unit offset K The length and specific position of the information and other factors, so that the determined unit offset K is more reasonable, the first terminal device can be ensured to normally transmit the side data on the communication resources configured by the network device, the inter-link interference caused by unreasonable time domain resource scheduling in the mobile communication system is reduced, and the applicability and the practicability of the mobile communication system can be improved.

With reference to the sixth aspect, in a possible implementation manner, a first subcarrier spacing of a downlink between the network device and the first terminal device is different from a second subcarrier spacing of a link where the first terminal device transmits the first sidelink data. The above-described second timing T2 satisfies the following equation:

here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz. μ 1 is a positive integer greater than 0, μ 2 ═ 0, S_DCIA sequence number, L, of a first symbol of the one or more symbols occupied by the downlink control information_DCIN is a corresponding sequence number of the second time unit in a downlink between the network device and the first terminal device, and S is the number of symbols occupied by the downlink control information _dataThe serial number of the first symbol in the one or more symbols occupied by the first side row data is used. The granularity of the time unit offset K is the time unit of the downlink, and the granularity of the time unit offset K1 is the time unit of the link through which the first terminal device transmits the first sidelink data. The network device fully considers the specific position of the first side row data in the first time unit, the length of the downlink control information, the specific position and the subframe timing deviation in the process of determining the time unit offset KAnd the like, so that the determined unit offset K is more reasonable, the first terminal device can be ensured to normally transmit the side data on the communication resource configured by the network device, the inter-link interference caused by unreasonable time domain resource scheduling in the mobile communication system is reduced, and the applicability and the practicability of the mobile communication system can be improved.

In a seventh aspect, an embodiment of the present application provides a method for receiving control information. The first terminal device receives radio resource control information for scheduling the first sidelink data from the network device at a first time T1. Here, the radio resource control information indicates a time unit offset K, which is a time unit offset of a first time unit in which the first terminal apparatus transmits first side row data, with respect to a reference time unit. The first terminal device determines a second time T2 at which the first terminal device transmits the first sidelink data, based on the time cell offset K, the first time T1, and a first threshold TH 1. Wherein, T2 is not less than (T1+ TH 1). The first terminal device transmits the first sidelink data to the second terminal device at the second time T2.

With reference to the seventh aspect, in a possible implementation manner, the first threshold TH1 is determined according to a processing time t1 when the first terminal device processes the radio resource control information, a preparation time t2 of the first side row data of the first terminal device, and a timing advance t3 between uplink and downlink between the first terminal device and the network device. Alternatively, the first threshold TH1 is predefined.

With reference to the seventh aspect, in a possible implementation manner, a first subcarrier spacing of a downlink between the network apparatus and the first terminal apparatus is the same as a second subcarrier spacing of a link where the first terminal apparatus transmits the first uplink data, and the second time T2 satisfies the following formula:

here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2)Khz，μ1＝μ2＝0，S_RRCA sequence number, L, of a first symbol of the one or more symbols occupied by the RRC message_RRCThe number of symbols occupied by the radio resource control information,

the number of symbols occupied by said second time unit, S_dataThe serial number of the first symbol in the one or more symbols occupied by the first side row data is used.

With reference to the seventh aspect, in a possible implementation manner, a first subcarrier spacing of a downlink between the network apparatus and the first terminal apparatus is different from a second subcarrier spacing of a link where the first terminal apparatus transmits the first uplink data, and the second time T2 satisfies the following formula:

the number of symbols occupied by said second time unit, S_dataT4 is a subframe timing offset between a downlink between the network device and the first terminal device and a link through which the first side row data is transmitted by the first terminal device, where the subframe timing offset is a sequence number of a first symbol of one or more symbols occupied by the first side row data.

In an eighth aspect, an embodiment of the present application provides a method for sending control information. The network device determines a second time T2 at which the first terminal device transmits the first sidelink data, based on the first threshold TH1 and a first time T1 at which the radio resource control information is transmitted to the first terminal device. Wherein, T2 is not less than (T1+ TH 1). The network device determines the time unit offset K according to the second time T2. The time unit offset K is a time unit offset of a first time unit of the first side row data transmitted by the first terminal device with respect to a reference time unit. The network device transmits, to the first terminal device, radio resource control information indicating the time unit offset K at the first time T1.

With reference to the eighth aspect, in a possible implementation manner, the first threshold TH1 is determined according to a processing time t1 when the first terminal device processes the radio resource control information, a preparation time t2 of the first side row data of the first terminal device, and a timing advance t3 between uplink and downlink between the first terminal device and the network device. Alternatively, the first threshold TH1 is predefined.

With reference to the eighth aspect, in a possible implementation manner, a first subcarrier spacing of a downlink between the network apparatus and the first terminal apparatus is the same as a second subcarrier spacing of a link where the first terminal apparatus transmits the first sidelink data, and the second time T2 satisfies the following formula:

With reference to the eighth aspect, in a possible implementation manner, a first subcarrier spacing of a downlink between the network apparatus and the first terminal apparatus is different from a second subcarrier spacing of a link where the first terminal apparatus transmits the first sidelink data, and the second time T2 satisfies the following formula:

In a ninth aspect, an embodiment of the present application provides a first terminal apparatus. It may be the first terminal device itself, or an element or module such as a chip inside the first terminal device. The first terminal device includes a unit configured to execute the receiving method for the control information provided in any possible implementation manner of the first aspect, the third aspect, the fifth aspect, or the seventh aspect, so that the beneficial effects (or advantages) of the receiving method for the control information provided in any possible implementation manner of the first aspect, the third aspect, the fifth aspect, or the seventh aspect can also be achieved.

In a tenth aspect, an embodiment of the present application provides a network device. It may be the network device itself, or an element or module such as a chip inside the network device. The network apparatus includes means for executing the method for transmitting control information provided in any possible implementation manner of the second aspect, the fourth aspect, the sixth aspect, or the eighth aspect, so that the beneficial effects (or advantages) of the method for transmitting control information provided in any possible implementation manner of the second aspect, the fourth aspect, the sixth aspect, or the eighth aspect can also be achieved.

In an eleventh aspect, embodiments of the present application provide a terminal device, which is a first terminal device. The terminal device includes one or more processors and one or more memories. The one or more memories are coupled to the one or more processors. The one or more processors are configured to invoke the codes stored in the one or more memories to execute the method for receiving the control information provided in any one of the possible implementation manners of the first aspect, the third aspect, the fifth aspect, or the seventh aspect.

In a twelfth aspect, an embodiment of the present application provides a network device. The network device includes one or more processors and one or more memories. The one or more memories are coupled to the one or more processors. The one or more memory processors are configured to call codes stored in the one or more memories to execute the method for sending control information provided by any one of the possible implementations of the second aspect, the fourth aspect, the sixth aspect, or the eighth aspect.

In a thirteenth aspect, an embodiment of the present application provides a communication apparatus, which is a first terminal apparatus. The communication device includes: a processor and interface circuitry. The interface circuit is used for receiving code instructions and transmitting the code instructions to the processor. The processor is configured to execute the code instructions to implement the unit of the method for receiving control information provided in any one of the possible implementations of the first aspect, the third aspect, the fifth aspect, or the seventh aspect, so that the beneficial effects (or advantages) of the method for receiving control information provided in any one of the possible implementations of the first aspect, the third aspect, the fifth aspect, or the seventh aspect can also be achieved.

In a fourteenth aspect, an embodiment of the present application provides a communication apparatus, where the communication apparatus is a network apparatus. The communication device includes: a processor and interface circuitry. The interface circuit is used for receiving code instructions and transmitting the code instructions to the processor. The processor is configured to execute the code instructions to implement the unit of the method for transmitting control information provided in any possible implementation manner of the second aspect, the fourth aspect, the sixth aspect, or the eighth aspect, so that the beneficial effects (or advantages) of the method for transmitting control information provided in any possible implementation manner of the second aspect, the fourth aspect, the sixth aspect, or the eighth aspect can also be achieved.

In a fifteenth aspect, the present application provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are executed on a computer, the instructions implement the unit of the method for receiving control information provided in any one of the foregoing first, third, fifth, or seventh possible implementations, so that the beneficial effects (or advantages) of the method for receiving control information provided in any one of the first, third, fifth, or seventh possible implementations can also be achieved.

In a sixteenth aspect, the present invention provides a computer-readable storage medium, where instructions are stored, and when the instructions are executed on a computer, the instructions implement a unit of a method for sending control information provided in any one of the above-mentioned second, fourth, sixth, or eighth possible implementations, so that beneficial effects (or advantages) of a method for sending control information provided in any one of the second, fourth, sixth, or eighth possible implementations can also be achieved.

In a seventeenth aspect, the present application provides a computer program product including instructions, where when the computer program product runs on a computer, the computer program product is capable of implementing the units of the method for receiving control information provided in any one of the foregoing possible implementations of the first aspect, the third aspect, the fifth aspect, or the seventh aspect, and thus is also capable of implementing beneficial effects (or advantages) of the method for receiving control information provided in any one of the possible implementations of the first aspect, the third aspect, the fifth aspect, or the seventh aspect.

Eighteenth aspect, the present application provides a computer program product including instructions, and when the computer program product runs on a computer, the computer program product can implement the unit of the method for sending the control information provided in any possible implementation manner of the second aspect, the fourth aspect, the sixth aspect, or the eighth aspect, so that the beneficial effects (or advantages) of the method for sending the control information provided in any possible implementation manner of the second aspect, the fourth aspect, the sixth aspect, or the eighth aspect can also be achieved.

In a nineteenth aspect, the present application provides a communication system, which includes one or more of the above network apparatuses, a first terminal apparatus, and a second terminal apparatus.

By adopting the method for sending and receiving the control information, the unit offset K determined by the network device can be more reasonable, the first terminal device can be ensured to have sufficient time to carry out the operations of processing the control information, preparing the sidestep data and the like, the inter-link interference caused by unreasonable time domain resource scheduling in the mobile communication system is reduced, and the applicability and the practicability of the mobile communication system can be improved.

Drawings

Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application;

fig. 2 is a flow chart of a method for sending and receiving control information according to an embodiment of the present disclosure;

fig. 3 is a timing diagram of a downlink and a sidelink according to an embodiment of the present disclosure;

FIG. 4-a is a schematic diagram of another timing diagram of a downlink and a sidelink according to an embodiment of the present application;

4-b is a schematic diagram of another timing sequence of a downlink and a sidelink provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of another timing diagram of a downlink and a sidelink according to an embodiment of the present disclosure;

fig. 6 is a schematic diagram of another timing diagram of a downlink and a sidelink according to an embodiment of the present disclosure;

fig. 7 is a schematic flowchart of another method for sending and receiving control information according to an embodiment of the present application;

fig. 8 is a schematic diagram of another timing sequence of a downlink and a sidelink according to an embodiment of the present disclosure;

fig. 9 is a schematic diagram of another timing sequence of a downlink and a sidelink according to an embodiment of the present application;

fig. 10 is a schematic diagram of another timing sequence of a downlink and a sidelink according to an embodiment of the present application;

fig. 11 is a schematic diagram of another timing sequence of a downlink and a sidelink according to an embodiment of the present application;

fig. 12 is a schematic flowchart of a method for sending and receiving control information according to an embodiment of the present application;

fig. 13 is a schematic diagram of another timing diagram of a downlink and a sidelink according to an embodiment of the present disclosure;

fig. 14 is a schematic diagram of another timing diagram of a downlink and a sidelink according to an embodiment of the present disclosure;

fig. 15 is a schematic flowchart of another method for sending and receiving control information according to an embodiment of the present application;

Fig. 16 is a schematic diagram of another timing sequence of a downlink and a sidelink according to an embodiment of the present application;

fig. 17 is a schematic diagram of another timing sequence of a downlink and a sidelink according to an embodiment of the present application;

fig. 18 is a schematic structural diagram of a first terminal device according to an embodiment of the present application;

fig. 19 is a schematic structural diagram of a network device according to an embodiment of the present application;

fig. 20 is a schematic structural diagram of a first terminal device according to an embodiment of the present application;

fig. 21 is a schematic diagram of another structure of a network device according to an embodiment of the present application;

fig. 22 is a schematic structural diagram of a first terminal device according to an embodiment of the present application;

fig. 23 is a schematic diagram of another structure of a network device according to an embodiment of the present application;

fig. 24 is a schematic structural diagram of a first terminal device according to an embodiment of the present application;

fig. 25 is a schematic diagram of another structure of a network device according to an embodiment of the present application;

fig. 26 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 27 is a schematic structural diagram of a network device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

The embodiment of the application provides a method for sending and receiving control information, and the method for sending and receiving control information is suitable for scenes such as V2X, Internet of vehicles, intelligent Internet of vehicles and automatic driving. The sending and receiving methods are suitable for scheduling time domain resources between a 5G mobile communication system (or called New Radio (NR) mobile communication system) or a Public Land Mobile Network (PLMN) in future evolution and already well-developed mobile communication systems such as a 4G mobile communication system and a 3G mobile communication system, and are also suitable for scheduling time domain resources in the 5G mobile communication system or the public land mobile communication network in future evolution. Here, the mobile communication system that has been well developed may further include a global system for mobile communications (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication system, and the like, which are not particularly limited herein.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present disclosure. As can be seen from fig. 1, the communication system may include a network device and at least two terminal devices (e.g., a first terminal device and a second terminal device in fig. 1). It should be noted that the communication links between the network device and the first terminal device are mainly uplink and downlink. The communication link between the first terminal device and the second terminal device is mainly a sidelink, i.e. the first terminal device may send sidelink data to the second terminal device via the sidelink. In a first application scenario, the network device, the first terminal device, and the second terminal device are in different mobile communication systems, that is, the network system of the network device is different from that of the first terminal device and that of the second terminal device. If the network device is in the 5G mobile communication system (i.e., the network system of the network device is the NR network), the first terminal device and the second terminal device are in the 4G mobile communication system (i.e., the network systems of the first terminal device and the second terminal device are the LTE network). In a second application scenario, the network device, the first terminal device, and the second terminal device are in the same mobile communication system, that is, the network system of the network device is the same as that of the first terminal device and that of the second terminal device. For example, in the first application scenario or the second application scenario, when the first terminal device needs to transmit data to the second terminal device through a sidelink (for convenience of distinction, the following description will be replaced by first sidelink data), the first terminal device will initiate a resource scheduling request to the network device, and the network device will respond to the resource dropping request and configure corresponding communication resources for the first terminal device, it should be noted that, in the embodiment of the present application, the network device will configure communication resources for the first terminal device in a semi-static scheduling manner. The high-level parameters mainly include frequency domain resources, modulation and demodulation parameters, antenna ports, demodulation reference signals and the like. Then, when the first terminal device needs to send data in the uplink or the sidelink, the network device may send control information (which may also be referred to as activation signaling) to the first terminal device again. The control information is mainly Downlink Control Information (DCI) or Radio Resource Control (RRC) information. Finally, the first terminal device may transmit the first sidelink data to the second terminal device based on the time domain resource indicated by the control information and the various communication resources included in the higher layer parameter.

Here, it is understood that the first terminal device or the second terminal device referred to in the embodiments of the present application may be a user equipment, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent or a user device, and may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a roadside unit, a wearable device, a terminal device in a future 5G network or a future evolved public land mobile communication network (public mobile network, PLMN), and the like, which is not limited in this embodiment of the present application. A network device related to an embodiment of the present application is a device deployed in a Radio Access Network (RAN) to provide a wireless communication function for a terminal device. The network device may be a base station, and the base station may include various macro base stations, micro base stations, relay stations, access point base station controllers, transmission reception nodes (TRPs), and the like. In systems using different radio access technologies, the specific names of base stations may be different, for example, in an LTE network, the base station is called an evolved node B (eNB), and in a subsequent evolved system, the base station may also be called a new radio node B (gNB). For convenience of description, in the following description of the present application, a network device will be taken as an example for illustration.

For the communication systems that have been applied in the mature manner, such as the 4G mobile communication system or the 3G mobile communication system, a series of resource control parameters and resource allocation rules for time domain resource allocation already exist in the prior art, so that the network device can reasonably allocate corresponding time domain resources to the terminal device. However, since the 5G mobile communication system or the future-evolution public land mobile network has a great difference from the already-developed mobile communication systems in terms of subframe timing, subcarrier spacing, etc., the resource control parameters and the resource allocation rules provided by the already-developed mobile communication systems are not applicable to the first application scenario or the second application scenario.

The technical problem to be solved by the method for sending and receiving control information provided by the embodiment of the application is that: how to enable the network device to accurately perform scheduling of time domain resources for the terminal devices under the same or different mobile communication systems, so as to reduce interference between different communication links caused by unreasonable scheduling of time domain resources.

It should be noted that, in the respective examples of the present application, the symbol "ceil ()" or "ceil", "is ]"means rounding up the content in brackets, which can be represented by mathematical symbols

Instead. Such as

Equivalently, X ═ ceil (Y) means that X is greater than or equal to Y. In the embodiments of the present application, if Y is a specific time, X ═ ceil (Y) means that X is not earlier than the specific time.

Example one

Referring to fig. 2, fig. 2 is a flow chart of a method for sending and receiving control information according to an embodiment of the present disclosure. The method for sending and receiving control information provided in this embodiment is applicable to the first application scenario, that is, the network device, the first terminal device, and the second terminal device belong to different network systems. If the network device belongs to the first network system, the first terminal device and the second terminal device belong to the second network system. Here, the first network type is specifically an NR network, and the second network type is specifically an LTE network. Or, the first network type may be specifically an LTE network, and the second network type may be specifically an NR network. The control information according to this embodiment is specifically downlink control information. As shown in fig. 2, the method comprises the steps of:

s101, the network device determines a second time T2 at which the first terminal device transmits the first sidelink data according to the first threshold TH1 and the first time T1 at which the network device is to transmit downlink control information to the first terminal device.

In some possible embodiments, when a first terminal device needs to send data to a second terminal device through a sidelink (for convenience of distinction, the first sidelink will be used instead of the description below), it may initiate a scheduling request of a time domain resource to a network device. When the network device detects the scheduling request, it may determine the first threshold TH 1. Here, the above-mentioned first threshold TH1 indicates a time period (hereinafter, for convenience of distinction, described in place of a minimum processing period) for which the network device needs to reserve at least a time period for performing operations of downlink control information processing, preparation of first sidelink data, and the like for the first terminal device. Then, the network device may obtain a time when it transmits the downlink control information to the first terminal device (for convenience of distinction, the first time T1 is described below instead), and determine a time when the first terminal device transmits the first sidelink data to the second terminal device according to the first threshold TH1 and the first time T1 (for convenience of distinction, the second time T2 is described below instead). Here, T2 ≧ T1+ TH 1.

In an alternative implementation, after the network device detects the scheduling request, the network device may obtain a required processing time t1 for the first terminal device to process the downlink control information. The network device may acquire the preparation time t2 required for the first terminal device to prepare the first sidestream data. The network device may further obtain a transition time t3 of the downlink control information between the first network format and the second network format. Here, the transition time t3 is specifically a time taken for the downlink control information to be transmitted from the data processing module of the first network system in the first terminal apparatus or to be transitioned to the data processing module of the second network system. Alternatively, the conversion time t3 may be specifically a time taken for the downlink control information to be transmitted from the data processing module of the second network system in the first terminal device or to be converted into the data processing module of the first network system. And are not limited herein. The network device may also obtain a timing advance t4 between its downlink with the first terminal device and the sidelink between the first terminal device and the second terminal device. Here, the NR network or the LTE network defines the timing advance t 4' of the uplink. The timing advance t 4' is mainly used to solve the uplink synchronization problem before the terminal device with a different physical distance from the network device. That is, the network device may instruct the terminal device with a different physical distance to perform data uplink in a different time period in advance, so that data transmitted by the terminal device with a different physical distance from the network device can arrive at the network device on the same time unit, thereby implementing uplink synchronization. In the LTE network, the timing advance t4 between the sidelink and the downlink is defined as t 4'/2, and this parameter setting will also be used in the embodiment of the present application. Of course, it is understood that the relationship between t4 and t 4' in different networks may be different from that specified in the LTE network, and is not limited herein. Optionally, the processing time t1, the preparation time t2, the transition time t3, and the timing advance t4 are predefined in the network device or obtained before the downlink control information is transmitted. Alternatively, the processing time t1, the preparation time t2, and the transition time t3 may be predefined values in the network device, and are not limited herein. After acquiring the processing time t1, the preparation time t2, the transition time t3, and the timing advance t4, the network device may determine the sum of the processing time t1, the preparation time t2, the transition time t3, and the timing advance t4 as the first threshold TH 1.

In an alternative implementation, when the network device detects the scheduling request, the network device may also directly obtain the predefined first threshold TH 1.

After the network device determines the first threshold TH1, the network device may further obtain a downlink time domain resource configured for transmitting the downlink control information, and determine a first time T1 when the network device transmits the downlink control information according to the downlink time domain resource. Here, the first time T1 may be an absolute time corresponding to a first symbol of the one or more symbols occupied by the downlink control information (i.e., a start transmission time of the downlink control information), or may be an absolute time corresponding to a last symbol of the one or more symbols occupied by the downlink control information (i.e., a transmission completion time of the downlink control information). In practical applications, the first time T1 at which the network device transmits downlink control information is the time at which the first terminal device receives the downlink control information, without considering the propagation delay. In the embodiment of the present application, for the sake of simplicity, the influence of the transmission delay is not considered. The time when the network device transmits the downlink control information is equivalent to the time when the first terminal device receives the downlink control information, and the two times can be replaced with each other. Then, the network device may determine a second time T2 at which the first terminal device transmits the first sidelink data to the second terminal device according to the first threshold TH1 and the first time T1, and by using a communication resource scheduling algorithm pre-configured by the network device. Here, the second timing T1 should satisfy the condition: t2 is more than or equal to T1+ TH 1. In other words, the second time T2 is not earlier than T1+ TH 1. The scheduling algorithm may specifically include a round robin algorithm, a fairness algorithm, a maximum carrier-to-interference ratio scheduling algorithm, and the like, which is not limited herein. In addition, the determination process at the second time T2 should also consider the configuration situations of the uplink (or the downlink) and the downlink in the Time Division Duplex (TDD) system, so that the time corresponding to T2 is the time that can be used by the terminal device to transmit data, which also belongs to the category of the communication resource scheduling algorithm, and is not limited herein.

S102, the network device determines the time unit offset K of the first time unit of the first side line data transmitted by the first terminal device relative to the second time unit of the first time T1 according to the first time T1 and the second time T2.

In some trusted embodiments, after determining the second time T2, the network device may determine the time unit offset K according to the second time T2 and a predefined correspondence between the second time T2 and the time unit offset K. Here, the time unit offset K is a time unit offset of a first time unit occupied in the sidelink (i.e., a time unit corresponding to the second time T2) when the first terminal device transmits the first sidelink data, with respect to a second time unit corresponding to the first time T1. Here, it should be noted that, for a certain communication link, the corresponding network system and the subcarrier interval are different, and the time unit used by the network device when performing time domain resource scheduling on the communication link is also different. For example, for a communication link in an NR network, the corresponding subcarrier spacing is (15 × 2)^μ1) Khz. Here, μ 1 is a positive integer greater than or equal to 0, and a time unit used when the network device performs time domain resource scheduling is a slot (slot). For a communication link in the LTE network, the corresponding subcarrier spacing is fixed at 15Khz, or the subcarrier spacing in the LTE network is (15 × 2) ^μ2) Where Khz is equal to 0, in the LTE network, the time unit used when the network device performs time domain resource scheduling is a subframe.

Next, the process of determining the time unit offset K by the network device will be specifically described according to the network system of the network device in the first application scenario, the network systems of the first terminal device and the second terminal device, and the specific configuration conditions of the subcarrier intervals.

The first implementation mode comprises the following steps:

in this embodiment, the network system of the network device is an NR network, and the network systems of the first terminal device and the second terminal device are LTE networks. The subcarrier spacing of the downlink between the network apparatus and the first terminal apparatus (hereinafter, described as the first subcarrier spacing for convenience of distinction) is the same as the subcarrier spacing of the link in which the first terminal apparatus transmits the above-described first sidestream data (hereinafter, described as the second subcarrier spacing for convenience of distinction, described as the sidelink for convenience of understanding). The first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz. μ 1 and μ 2 are each a positive integer greater than or equal to 0, and μ 1 ═ μ 2 ═ 0.

In one specific implementation, after determining the second time T2, the network device may determine the time unit offset K according to the following formula (1):

Here, equation (1) expresses the correspondence between the parameter values such as the first timing T1, the second timing T2, and the like, and the time unit shift amount K. Here, the time unit offset K indicates the offset for granularity in terms of one time unit in the sidelink. In the formula (1), S_DCIA sequence number, L, of a first symbol of the one or more symbols occupied by the downlink control information_DCIThe number of symbols occupied by the downlink control information,

the number of symbols occupied by the second time unit. In the uplink or downlink of the NR network, each subframe is 1ms in length and contains 2^μ1A time slot, each time slot including

The number of symbols, and therefore,

i.e. the length of each symbol in the downlink within the NR network. In a communication link of an LTE network, each sub-frame has a length of

I.e. 1 ms. T1 is the absolute time corresponding to the last symbol in the one or more symbols occupied by the downlink control information. Here, it should be noted that, here, if

The corresponding time is the boundary of a subframe in the sidelink, and equation (1) can also be expressed as

As for the later paragraph, ceil [ 2 ]]If a similar situation occurs, the formula can be modified and replaced in the same manner as described above. The detailed description of the process will not be repeated hereinafter.

The above formula (1) will be briefly described with reference to fig. 3. Fig. 3 is a timing diagram of a downlink and a sidelink according to an embodiment of the present disclosure. In the present embodiment, the downlink time unit is a subframe and has a length of 1ms, and the sidelink time unit is a slot and also has a length of 1 ms. As shown in fig. 3, when considering the uplink synchronization problem, there is a timing advance t4 between the downlink and the sidelink between the first terminal device and the second terminal device. And, in a specific implementation,

wherein N is_TAIs a predefined time advance between the uplink and downlink between the network device and the first terminal device. Tc is the system basic time unit of NR network, TS is the system basic time of LTE networkAnd (4) a unit of time. As can be seen from the foregoing, the time unit offset K is a time unit offset of the first time unit at the second time T2 relative to the second time unit at the first time T1, and a relationship between the start time T3 of the second time unit and the second time T2 at which the first side row data is transmitted is as follows:

in the NR network, the number of symbols occupied by the downlink control information and the sequence number of the occupied symbols are not fixed. Therefore, it can be obtained that the relationship between the first time T1 when the network device transmits the downlink control information and the start time T3 of the second time unit is shown as the following formula:

Here, T1 is a time corresponding to an end symbol of downlink control information (i.e. the first time T1 may be an absolute time corresponding to a last symbol of one or more symbols occupied by the downlink control information). Finally, the above formula (1) can be obtained by substituting the above formula (3) into the above formula (2).

In another specific implementation, if the first time T1 is a time corresponding to a start symbol of downlink control information (i.e. the first time T1 may be an absolute time corresponding to a first symbol of one or more symbols occupied by the downlink control information), a relationship between the first time T1 and the start time T3 of the second time unit is as follows:

by substituting the above equation (3') into the above equation (2), it can be determined that the correspondence between the second time T2 and the time cell offset K satisfies the following equation:

further, if the second time T1 satisfies the condition T2 ≧ T1+ TH1 when the above formula (3') is substituted, the second time satisfies the following condition:

that is, when determining the first time to transmit the first sidelink data for the first terminal device, the network device needs to consider not only the processing time t1, the preparation time t2, and the transition time t3, but also the start symbol position of the downlink control information in the second time unit. In the conventional LTE network, the transmission time T2 of the sidelink data instructed by the network device for the first terminal device is determined to be no earlier than T3-T4+ (4+ m) × 10 ^-3s, i.e. the first terminal device needs to transmit after (4+ m) ms of the subframe in which the downlink control information is located. Here, 4ms (milliseconds) is a time reserved by the network device for the first terminal device to perform operations such as downlink control information processing, sidestream data preparation, and the like. The first terminal device transmits data after defaulting (4+ m) ms after receiving the downlink control information. m is a subframe offset determined by the network device according to the uplink and downlink subframe ratio of the TDD, and the network device notifies the first terminal device through downlink control information. It should be explained that if m is not indicated in the downlink control information, the first terminal device may default that m is 0. Therefore, in a possible implementation, the scheduling procedure of the NR network may refer to the scheduling procedure of the LTE network, that is, the transmission time T2 of the sidelink data indicated by the network device for the first terminal device may be directly specified to be no earlier than T3-T4+ (x + m1) × 10^- ³And s, wherein x is a preset terminal device processing time, namely 4ms in the LTE system. Here, since the downlink control information in the NR network may be configured by the network device at any position of one time unit (slot), for example, the network device may configure the downlink control information at the middle or last several symbols of a certain slot. If, as such, the network device is reserved for the first terminal device The time for performing operations such as downlink control information processing and sidestream data preparation is still 4ms, which may result in insufficient processing time left for the first terminal device, and the first terminal device may not be able to complete operations such as processing and data preparation of downlink control information, i.e., the first terminal device may not be able to transmit information on the time resources scheduled by the network device. The network device has reserved the resource to the first terminal device, which results in a waste of resources. Therefore, the value of x may be related to a specific location of the downlink control information in a certain timeslot.

In an alternative, the network device and the first terminal device determine the time for transmitting the sideline data by controlling the time resource location (e.g. start symbol) of the information. If the downlink control information is in the first several symbols of a certain timeslot (for example, the starting symbol number is 0-4), the value of x may be 4 ms. If the downlink control information is in the last symbols of a certain timeslot, x can be 5ms (for example, the starting symbol number is 10-14). If the downlink control information is in the middle of several symbols of a certain timeslot, the value of x may be 4.5ms (e.g., the initial symbol number is 5-9).

In another optional manner, if the first terminal device in the existing LTE network is not modified in terms of processing data timing, the sidestream data is still transmitted after the downlink control information notified by the network device in the NR network is received, according to the default 4 ms. When the network device determines the value of m1, the influence of the specific location of the downlink control signaling in the timeslot may also be considered. Optionally, in a specific implementation, m1 may satisfy the following condition:

Wherein m is equal to 0. In this way, the system configuration of the terminal device in the LTE network does not need to be modified, and the forward compatibility of the mobile communication system can be ensured.

In the process of determining the time unit offset K, if the specific position of the downlink control information in the second time unit is not considered, a time unit offset is determined directly according to the start time T3 and the second sending time T2 (for convenience of distinction, the time unit offset K2 is used instead of the description below), so that the offset period indicated by the time unit offset K2 is greater than the time difference between the first time T1 when the first terminal device receives the downlink control information and the second time T2 when the first side data is sent, that is, the time left for the first terminal device to perform operations such as downlink control information processing is shortened, and a situation that the first terminal device does not have sufficient time to perform operations such as downlink control information processing is likely to occur. And in the process of determining the time unit offset K, the specific position of the downlink control information in the second time unit is fully considered, so that the offset period indicated by the determined time unit offset K is equal to or greater than the time difference between the first time T1 and the second time T2, thereby ensuring that the first terminal device has enough time to perform operations such as processing of the downlink control information, and the second time T2 is certainly no earlier than the time T1+ TH 1. In summary, the time unit offset determined by using the formula (1) or (1') is more reasonable, so that the first terminal device can normally transmit the side data on the communication resource configured by the network device, the inter-link interference caused by unreasonable time domain resource scheduling in the mobile communication system is reduced, and the applicability and the practicability of the mobile communication system can be improved.

The second embodiment:

in this embodiment, the network system of the network device is an NR network, and the network systems of the first terminal device and the second terminal device are LTE networks. The first subcarrier spacing of the downlink is different from the second subcarrier spacing of the sidelink. The first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2 μ 2 Khz. μ 1 and μ 2 are both positive integers greater than or equal to 0, μ 1 ≠ μ 2, and μ 2 ═ 0. That is, in the present embodiment, the time unit that can be scheduled in the downlink is a time slot. Each sub-frame has a length of 1ms and contains 2^μ1A time slot so that each time slot has a length of

The time units that can be scheduled in the sidelink are subframes, and each subframe is 1ms in length.

In a specific implementation, after determining the second time T2, the network device may determine the time unit offset K according to the following formula (4):

here, equation (4) expresses the correspondence between the parameter values such as the first timing T1, the second timing T2, and the like, and the time unit shift amount K. The first time T1 is the time corresponding to the ending symbol of the downlink control information (i.e. the first time T1 may be the absolute time corresponding to the last symbol of one or more symbols occupied by the downlink control information. here, the time unit offset K indicates the offset according to the granularity of a time unit in the downlink. in equation (4), S is the time corresponding to the ending symbol of the downlink control information _DCIThe sequence number of the first symbol in the one or more symbols occupied by the downlink control information. L is_DCIThe number of symbols occupied by the downlink control information.

The number of symbols occupied by the second time unit. In the downlink of the present embodiment, each slot includes

The number of symbols, and therefore,

i.e. the length of each symbol in the downlink. In the sidelink, each subframe is of length

I.e. 1 ms.

The above equation (4) will be briefly described with reference to fig. 4-a. FIG. 4-a is a schematic diagram of an embodiment of the present applicationA downlink and sidelink timing diagram. As shown in fig. 4-a, in consideration of the uplink synchronization problem, there is also a timing advance t4 between the sidelink and the downlink. Since the first and second subcarriers may belong to different carriers, there will be an intercarrier timing offset T between the first and second subcarriers_cc. Thus, in particular implementations, timing advance

Wherein N is_TAIs a predefined time advance between the uplink and downlink between the network device and the first terminal device. TS is the basic time unit of the system in LTE network, T _cIs the system basic time unit in the NR network. The length of the time slot in the downlink as described above. As can be seen from the foregoing, the time unit offset K is a time unit offset of the first time unit corresponding to the second time unit corresponding to the first time T2 relative to the second time unit corresponding to the first time T1, and a relationship between the start time T3 of the second time unit and the second time T2 at which the first side row data is transmitted is as follows:

here, since the first subcarrier spacing is different from the second subcarrier spacing, the length of each slot in the downlink is made to be

I.e. the length of each time unit in the downlink becomes the length of each time unit in the sidelink

And (4) doubling. Thus, the time unit number corresponding to the downlink at the same time is the time unit number corresponding to the sidelink at that time

And (4) doubling. For example, as shown in FIG. 4-a, assuming that the first subcarrier spacing is 30Khz and the second subcarrier spacing is 15Khz, the second time unit with sequence number N in the downlink and the corresponding time unit in the sidelink with sequence number N is assumed to be

Therefore, the time unit offset K in the downlink and the time unit offset K1 in the sidelink satisfy the following condition:

Substituting this condition into equation (5) above, the following equation is obtained:

in the NR network, the number of occupied symbols and the sequence number of occupied symbols of the downlink control information are not fixed. Therefore, it can be obtained that the relationship between the first time T1 when the network device transmits the downlink control information and the start time T3 of the second time unit is shown as the following formula:

finally, the above formula (5) can be obtained by substituting the above formula (7) into the above formula (6).

In another specific implementation, the first time T1 may be a time corresponding to a starting symbol of downlink control information (i.e., the first time T1 may be an absolute time corresponding to a first symbol of one or more symbols occupied by the downlink control information). At this time, the relationship between the first time T1 and the starting time T3 of the second time unit is as follows:

by substituting the above equation (7') into the above equation (6), it can be determined that the correspondence between the second time T2 and the time cell shift amount K satisfies the following equation:

in this embodiment, the specific position of the downlink control information in the time unit and the subframe timing deviation caused by different subcarrier intervals are fully considered in the process of determining the time unit offset K by using the formula (5) or the formula (5'), so that the determined unit offset K is more reasonable, the first terminal device can be ensured to normally transmit side data on the communication resource configured by the network device, the inter-link interference caused by unreasonable time domain resource scheduling in the mobile communication system is reduced, and the applicability and the practicability of the mobile communication system can be improved.

Further, if the above equation (7') is substituted into the condition T2 ≧ T1+ TH1 which the second time T1 should satisfy, the second time T2 should satisfy the following condition:

that is, when determining the first time T1 for the first terminal device to transmit the first sidelink data, the network device needs to consider not only the processing time T1, the preparation time T2, and the transition time T3, but also the start symbol position of the downlink control information in the second time unit. In the conventional LTE network, the transmission time T2 of the sidelink data instructed by the network device for the first terminal device is determined to be no earlier than T3-T4+ (4+ m) × 10^- ³s, i.e. the first terminal device needs to transmit after (4+ m) ms of the subframe in which the downlink control information is located. Here, 4ms is the time reserved by the network device for the first terminal device to perform operations such as downlink control information processing, sidestream data preparation, and the terminal device transmits data after default (4+ m) ms after receiving the downlink control signaling. m is the subframe offset determined by the network device according to the uplink/downlink subframe ratio of the TDD systemThe network device notifies the first terminal device through the downlink control information. It should be explained that if m is not indicated in the downlink control information, the first terminal device may default that m is 0. Therefore, in a possible implementation, the scheduling procedure of the NR network may refer to the scheduling procedure of the LTE network, i.e., the transmission time T2 of the sidelink data indicated by the network device for the first terminal device may be directly specified to be no earlier than T3-T4+ (x + m1) × 10 ^-3And s, wherein x is a preset terminal device processing time, namely 4ms in the LTE system. Here, since the downlink control information in the NR system can be configured by the network device at any position of one time unit (slot), the network device can configure the downlink control information at the middle or last several symbols of a certain slot. In this way, if the time reserved by the network device for the first terminal device to perform operations such as downlink control information processing and sidestream data preparation is still 4ms, the time left for the first terminal device may be insufficient, and the first terminal device may not complete the operations such as downlink control information processing and data preparation, that is, cannot transmit information on the time resource scheduled by the network device. The network device has reserved the resource to the terminal device, which results in a waste of resources. Therefore, the value of x may be associated with a specific position of the downlink control information in a certain timeslot.

In one specific implementation, the network device and the first terminal device determine the time for transmitting the sidelink data according to a time resource location (e.g., a start symbol) of the downlink control information. If the downlink control information is in the first several symbols of a certain timeslot (for example, the starting symbol number is 0-4), the value of x may be 4 ms. If the downlink control information is in the last symbols of a certain timeslot, x can be 5ms (for example, the starting symbol number is 10-14). If the downlink control information is in the middle of several symbols of a certain timeslot, the value of x may be 4.5ms (e.g., the initial symbol number is 5-9). Further, please refer to fig. 4-b, where fig. 4-b is a schematic timing diagram of a downlink and a sidelink according to an embodiment of the present application. As in fig. 4-b, the subcarrier spacing for the downlink and the sidelink are different. Here, the subcarrier spacing for the downlink is assumed to be 30Khz and the subcarrier spacing for the sidelink is assumed to be 15 Khz. Since time unit (or slot) N and time unit N +1 both correspond to time unit N/2 in the sidelink. Therefore, whether the downlink control information is in the time slot N or the time slot N +1 has a different effect on the network device scheduling the first time T1 for the first terminal device. Therefore, the serial numbers of the time slots in which the downlink control information is located in a plurality of different time slots corresponding to the same sidelink subframe, the initial symbol positions of the downlink control information in the time slots, and other factors need to be considered. For example, if N is 20, if the downlink control information is transmitted in the timeslot with the timeslot number of 20 (i.e., the network device transmits at time T1), it needs to consider that the value of x ranges from 0 to 0.5 ms; if the downlink control information is transmitted in the timeslot with the timeslot number 21 (i.e. the network device transmits at time T1'), it needs to consider that the value range of x is 0.5ms to 1 ms. Thus, the value of x can be determined at the position of the time slot where the downlink control information is located in the corresponding LTE subframe. That is, if the downlink control information is transmitted in the timeslot N, x is 4.5ms, as shown in fig. 4-b. If the downlink control information is transmitted in the timeslot N +1, x takes 5 ms. The position of the starting symbol of the downlink control information transmission can be further divided in consideration. If the downlink control information is transmitted in the first 7 symbols in the timeslot N, x takes 4 ms. If the downlink control information is transmitted in the last 7 symbols in the time slot N, x takes 4.5 ms. If the downlink control information is transmitted in the first 7 symbols transmitted in the timeslot N +1, x is 4.5 ms. If the downlink control information is transmitted in 7 symbols after being transmitted in the time slot N +1, the value of x is 5 ms.

In one specific implementation, if the first terminal device in the existing LTE network is not modified in terms of processing data timing, that is, after receiving the downlink control information notified by the network device in the NR network, the first terminal device still transmits the sideline data after default 4 ms. When the network device determines the value of m1, the influence of the specific location of the downlink control signaling in the timeslot may also be considered. Optionally, in a specific implementation, m1 may satisfy the following condition:

The third embodiment is as follows:

in this embodiment, the network system of the network device is an LTE network, and the network systems of the first terminal device and the second terminal device are NR networks. The downlink first subcarrier spacing is the same as the uplink second subcarrier spacing at which the first terminal device transmits the first uplink data. The first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz. μ 1 and μ 2 are each a positive integer greater than or equal to 0, μ 1 ═ μ 2, and μ 2 ═ 0 is exemplified. That is, in the present embodiment, the time units that can be scheduled in the downlink are subframes, and each subframe has a length of 10 ^-3And s. The time units that can be scheduled in the sidelink are time slots. Each subframe in the downlink has a length of 10^-3s。

In a specific implementation, after determining the second time T2, the network device may determine the time unit offset K according to the following formula (8):

here, equation (8) expresses the correspondence between the parameter values such as the first timing T1, the second timing T2, and the like, and the time unit shift amount K. The first time T1 is a time corresponding to an end symbol of the downlink control information (i.e. the first time T1 may be an absolute time corresponding to a last symbol of one or more symbols occupied by the downlink control information). The time unit offset K indicates the offset for granularity in terms of one time unit in the sidelink. In the formula (8), L_DCIThe number of symbols occupied by the downlink control information, S_dataThe serial number of the first symbol in the one or more symbols occupied by the first side row data,

the number of symbols occupied by the second time unit.

The above equation (8) will be briefly described with reference to fig. 5. Fig. 5 is a schematic diagram of another timing diagram of a downlink and a sidelink according to an embodiment of the present disclosure. As shown in fig. 5, in consideration of the uplink synchronization problem, there is a timing advance t4 between the downlink and the sidelink between the first terminal device and the second terminal device. And, in a specific implementation,

Wherein N is_TAIs a predefined time advance between the uplink and downlink between the network device and the first terminal device. Tc is a system basic time unit of the NR network, and TS is a system basic time unit of the LTE network. As can be seen from the above, the time unit offset K is the time unit offset of the first time unit at the second time T2 relative to the second time unit at the first time T1. And because the starting position of the first sidelink data is not fixed in the sidelink under the NR network, the first sidelink data needs to be considered. Therefore, the relationship between the start time T3 of the second time unit and the second time T2 at which the first sidelink data is transmitted is as follows:

considering the length L of the downlink control information_DCIIn this case, the relationship between the first time T1 when the network device sends the downlink control information and the starting time T3 of the second time unit is shown as the following formula:

finally, the above equation (8) can be obtained by substituting the above equation (10) into the above equation (9).

T3＝T1 (10’)

By substituting the above equation (10') into the above equation (9), it can be determined that the correspondence between the second time T2 and the time cell offset K satisfies the following equation:

in this embodiment, the specific position of the first side data in the time unit, the length of the downlink control information, and other factors are fully considered in the process of determining the time unit offset K by using the formula (8) or (8'), so that the determined unit offset K is more reasonable, the first terminal device can be ensured to normally transmit the side data on the communication resource configured by the network device, the inter-link interference caused by unreasonable scheduling of time domain resources in the mobile communication system is reduced, and the applicability and the practicability of the mobile communication system can be improved.

The fourth embodiment:

in this embodiment, the network system of the network device is an LTE network, and the network systems of the first terminal device and the second terminal device are NR networks. The downlink first subcarrier spacing is different from the first terminal apparatus side uplink second subcarrier spacing for transmitting the first side row data. The first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2) ^μ2) Khz. μ 1 and μ 2 are both positive integers greater than or equal to 0, μ 1 ≠ μ 2, and preferably, μ 1 ═ 0. That is, in the present embodiment, the time units that can be scheduled in the downlink are subframes, and each subframe has a length of 10^- ³And s. Schedulable in sidelinkThe time units are time slots. Each subframe in the sidelink has a length of 10^-3And s. Each subframe contains 2^μ2A time slot, each time slot also having a length of

In a specific implementation, after determining the second time T2, the network device may determine the time unit offset K according to the following equation (11):

here, equation (11) expresses the correspondence between the parameter values such as the first timing T1, the second timing T2, and the like, and the time unit shift amount K. Here, the first time T1 is a time corresponding to an end symbol of the downlink control information (that is, the first time T1 may be an absolute time corresponding to a last symbol of one or more symbols occupied by the downlink control information). The time unit offset K indicates the offset for granularity in terms of one time unit in the downlink. In formula (11), L_DCIThe number of symbols occupied by the downlink control information, S_dataThe serial number of the first symbol in the one or more symbols occupied by the first side row data,

The number of symbols occupied by the second time unit.

The above formula (11) will be briefly described with reference to fig. 6. Fig. 6 is a schematic diagram of another timing diagram of a downlink and a sidelink according to an embodiment of the present disclosure. As shown in fig. 6, in consideration of the uplink synchronization problem, there is a timing advance t4 between the downlink and the sidelink between the first terminal device and the second terminal device. And, since the first and second subcarriers may belong to different carriers, there will be an inter-carrier timing offset T between the first and second subcarriers_cc. Thus, in a particular implementation,timing advance

Wherein N is_TAIs a predefined time advance between the uplink and downlink between the network device and the first terminal device. TS is the basic time unit of the system in LTE network, T_CIs the system basic time unit in the NR network. As can be seen from the above, the time unit offset K is the time unit offset of the first time unit at the second time T2 relative to the second time unit at the first time T1. And because the starting position of the first sidelink data is not fixed in the sidelink under the NR network, the first sidelink data needs to be considered. Therefore, the relationship between the start time T3 of the second time unit and the second time T2 at which the first sidelink data is transmitted is as follows:

Here, K1 is the corresponding time cell offset in the sidelink. Because the first subcarrier spacing is different from the second subcarrier spacing, the length of each time slot in the sidelink is made to be

I.e. the length of each time unit in the sidelink becomes the length of each time unit in the downlink

And (4) doubling. For example, as shown in fig. 6, assuming that the first subcarrier spacing is 15Khz and the second subcarrier spacing is 30Khz, in the sidelinkThe time unit corresponding to the second time unit with the sequence number N in the downlink has the sequence number N

by substituting this condition into the above equation (12), the following equation can be obtained:

finally, the formula (11) is obtained by substituting the formula (14) into the formula (13).

T3＝T1 (14’)

by substituting the above equation (14') into the above equation (13), it can be determined that the correspondence between the second time T2 and the time cell shift amount K satisfies the following equation:

in this embodiment, the specific position of the first side data in the time unit, the subframe timing deviation, the length of the downlink control information, and other factors are fully considered in the process of determining the time unit offset K by using the formula (11) or (11'), so that the determined unit offset K is more reasonable, the first terminal device can be ensured to normally transmit the side data on the communication resource configured by the network device, the inter-link interference caused by unreasonable scheduling of the time domain resource in the mobile communication system is reduced, and the applicability and the practicability of the mobile communication system can be improved.

S103, the network device transmits the downlink control information indicating the time unit offset K at the first time T1.

In some possible embodiments, after determining the time unit offset K, the network device may determine downlink control information indicating the time unit offset K. In an alternative implementation, the network device may directly include the time unit offset K in the downlink control information. In another optional implementation manner, the network device may further determine a first identifier corresponding to the time unit offset K from predefined offset indication information, and pack the first identifier in the downlink control information. It should be noted that the offset indication information includes one or more sets of indication information for indicating correspondence between different time unit offsets and different identifiers. E.g., time unit offset K corresponds to a first identification, time unit offset K1 corresponds to a second identification, etc. Meanwhile, the offset indication information is also predefined in the first terminal device or the second terminal device, so that the subsequent first terminal device and the second terminal device can determine the time unit offset indicated by the offset indication information according to the identifier contained in the downlink control information. After determining the downlink control information, the network device performs operations such as encoding on the downlink control information to obtain a control signaling corresponding to the downlink control information, and sends the control signaling to the first terminal device when a first time T1 arrives.

S104, the first terminal device receives the downlink control information at the first time T1, and determines the second time T2 according to the time unit offset K, the first time T1 and the first threshold TH 1.

In some possible embodiments, the first terminal device may detect, in the downlink, a control signaling corresponding to the downlink control information in real time, and after the first terminal device receives the control signaling from the network device at the first time T1, the first terminal device needs to perform operations such as decoding and data parsing on the control signaling to obtain the downlink control information. The first terminal device may further determine a time unit offset K according to the downlink control information, and determine a second time T2 when the first side line data is transmitted according to the time unit offset K and the first time T1.

Optionally, in a specific implementation, with reference to the scenarios corresponding to the first implementation and the second implementation described in step S102, the first terminal device in the LTE network may detect, in real time, the control signaling corresponding to the downlink control information in the downlink through the NR processing module included in the first terminal device. When the NR processing module receives a control signaling corresponding to the downlink control information at the first time T1, the NR processing module may process the control signaling to obtain the downlink control information. Then, the first terminal device may control the NR processing module to transmit the downlink control information to an LTE processing module included in the NR processing module, and process the downlink control information through the LTE processing module to obtain a time unit offset K. Finally, the first terminal device can determine the second time T2 when it transmits the first sidelink data according to the time unit offset K and the first time T1.

Optionally, in a specific implementation, with reference to the scenarios corresponding to the third embodiment and the fourth embodiment described in step S102, the first terminal device in the NR network may detect the control signaling corresponding to the downlink control information in the downlink in real time through the LTE processing module included in the first terminal device. When the LTE processing module receives the control signaling corresponding to the downlink control information at the first time T1, the LTE processing module may process the control signaling to obtain the downlink control information. Then, the first terminal device may control the LTE processing module to transmit the downlink control information to an NR processing module included in the LTE processing module, and process the downlink control information through the NR processing module to obtain a time unit offset K. Finally, the first terminal device can determine the second time T2 when it transmits the first sidelink data according to the time unit offset K and the first time T1.

At S105, the first terminal device transmits the first sidelink data to the second terminal device at the second time T2.

In some possible embodiments, the first side line data may be prepared after the first terminal device determines the second time T2 when the first side line data is transmitted. Then, the first sidelink data is transmitted to the second terminal apparatus on the time domain resource corresponding to the second time T1 and the frequency domain resource included in the above-described higher layer parameter.

It should be noted that, in different application scenarios, the first terminal device and the second terminal device may be replaced with each other, that is, the network device may schedule, for the first terminal device, a time domain resource required for transmitting the sidestream data to the second terminal device, and the network device may also schedule, for the second terminal device, a time domain resource required for transmitting the sidestream data to the first terminal device, which is not specifically limited in the embodiment of the present application.

In the embodiment of the application, for different implementation scenarios, one or more of factors such as a specific position of downlink control information in the second time unit, a specific position of first side data in the first time unit, subframe timing deviation, a length of the downlink control information, and the like are fully considered when determining the time unit offset, so that a network device can accurately schedule time domain resources for a first terminal device in different mobile communication systems, interference between different communication links due to unreasonable scheduling of the time domain resources is reduced, and applicability and practicability of the mobile communication system are improved.

Example two

Referring to fig. 7, fig. 7 is a schematic flow chart of a method for sending and receiving control information according to an embodiment of the present application. The method for sending and receiving control information provided in this embodiment is applicable to the first application scenario, that is, the network device, the first terminal device, and the second terminal device belong to different network systems. In this embodiment, the network device belongs to a first network system, and the first terminal device and the second terminal device belong to a second network system. The first network system may be specifically an NR network, and the second network system may be specifically an LTE network. Or, the first network type may be specifically an LTE network, and the second network type may be specifically an NR network. The control information according to the present embodiment is specifically radio resource control information. As shown in fig. 7, the method comprises the steps of:

S201, the network device determines a second time T2 at which the first terminal device transmits the first sidelink data, based on the first threshold TH1 and the first time T1 at which it will transmit the downlink radio resource control information to the first terminal device.

In some possible embodiments, when a first terminal device needs to send data to a second terminal device through a sidelink (for convenience of distinction, the first sidelink will be used instead of the description below), it may initiate a scheduling request of a time domain resource to a network device. When the network device detects the scheduling request, it may determine the first threshold TH 1. Here, the above-mentioned first threshold TH1 indicates a time period (hereinafter, for convenience of distinction, described in place of a minimum processing period) for which the network apparatus needs to reserve at least a time period for performing operations of radio resource control information processing, preparation of first sidelink data, and the like for the first terminal apparatus. Then, the network device may obtain a time when it transmits the radio resource control information to the first terminal device (for convenience of distinction, the first time T1 is described below instead), and determine a time when the first terminal device transmits the first sidelink data to the second terminal device according to the first threshold TH1 and the first time T1 (for convenience of distinction, the second time T2 is described below instead). Here, T2 ≧ T1+ TH 1.

In a specific implementation, the process of determining the first threshold TH1 by the network device may refer to the determination process of the first threshold TH1 described in step S101 in the first embodiment, and is not described herein again.

After the network device determines the first threshold TH1, the network device may further obtain the downlink time domain resource configured for the radio resource control information, and determine a first time T1 when the network device sends the radio resource control information according to the downlink time domain resource. Here, the first time T1 may be an absolute time corresponding to a first symbol of one or more symbols occupied by the radio resource control information (i.e., a start transmission time of the radio resource control information), or may be an absolute time corresponding to a last symbol of one or more symbols occupied by the radio resource control information (i.e., a transmission completion time of the radio resource control information). In practical applications, the first time T1 at which the network device transmits the radio resource control information is the time at which the first terminal device receives the radio resource control information, without considering the propagation delay. In the embodiment of the present application, in order to simplify the period, the effect of the transmission delay is not considered, that is, the time when the network apparatus transmits the radio resource control information is equivalent to the time when the first terminal apparatus receives the radio resource control information, and the two may be replaced with each other. Then, the network device may determine a second time T2 at which the first terminal device transmits the first sidelink data to the second terminal device according to the first threshold TH1 and the first time T1, and by using a communication resource scheduling algorithm pre-configured by the network device. Here, the second timing T1 should satisfy the condition: t2 is more than or equal to T1+ TH 1. In other words, the second time T2 is not earlier than T1+ TH 1. The communication resource scheduling algorithm may specifically include a round robin algorithm, a fairness algorithm, a maximum carrier-to-interference ratio scheduling algorithm, and the like, which is not limited herein. Meanwhile, the determination of the second time T2 should also consider the configuration situation of the uplink (or sidestream) and downlink of the TDD system, so that the time corresponding to the second time T2 is the time when the terminal device configured by the network device can transmit data.

S202, the network device determines the time unit offset K of the first time unit of the first side line data transmitted by the first terminal device relative to the reference time unit according to the first time T1 and the second time T2.

In some trusted embodiments, after determining the second time T2, the network device may determine the time unit offset K according to the second time T2 and a corresponding relationship between a preset second time T2 and the time unit offset K. Here, the time unit offset K is a time unit offset of a first time unit (i.e., a time unit corresponding to the second time T2) occupied in the sidelink when the first terminal device transmits the first sidelink data, with respect to a reference time unit. Here, in a specific implementation, the reference time unit in the downlink is a time unit with a sequence number of 0. The reference time cell in the sidelink is the time cell with sequence number 0 in the sidelink.

Here, it should be noted that, for a certain communication link, the corresponding network system and the subcarrier interval are different, and the time unit used by the network device when performing time domain resource scheduling on the communication link is also different. For example, for a communication link in an NR network, the corresponding subcarrier spacing is (15 × 2) ^μ1) Khz. Here, μ 1 is a positive integer greater than or equal to 0, and a time unit used when the network device performs time domain resource scheduling is a slot (slot). For a communication link in the LTE network, the corresponding subcarrier spacing is fixed at 15Khz, or the subcarrier spacing in the LTE network is (15 × 2)^μ2) Where Khz is equal to 0, in the LTE network, the time unit used when the network device performs time domain resource scheduling is a subframe.

The first implementation mode comprises the following steps:

in this embodiment, the network system of the network device is an NR network, and the network systems of the first terminal device and the second terminal device are LTE networks. The subcarrier spacing of the downlink between the network device and the first terminal device (for convenience of distinction, the first subcarrier spacing is described below instead) is transmitted by the first terminal device to the above-described first sidelinkThe sub-carrier spacing (for ease of distinction, the second sub-carrier spacing is described below) is the same for the links of data (for ease of understanding, the sidelink will be described in the afternoon). The first subcarrier spacing is (15 × 2) ^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz. Wherein, μ 1 ═ μ 2 ═ 0. That is, in the present embodiment, the time units that can be scheduled in the sidelink are subframes, and each subframe has a length of 10^-3And s. The time units that can be scheduled in the downlink are time slots. Each subframe in the downlink has a length of 10^-3And s. Each subframe contains 2^μ1One (i.e. 1) time slot, each time slot also having a length of 10^-3s。

In a specific implementation, after determining the second time T2, the network device may determine the time unit offset K according to the following formula (15):

here, equation (15) expresses the correspondence between the parameter values such as the first timing T1, the second timing T2, and the like, and the time unit shift amount K. The first time T1 is a time corresponding to an end symbol of the rrc message (i.e., the first time T1 may be an absolute time corresponding to a last symbol of the one or more symbols occupied by the rrc message). The time unit offset K indicates the offset for granularity in terms of one time unit in the sidelink. In the formula (15), S_RRCA sequence number, L, of a first symbol of the one or more symbols occupied by the RRC message _RRCThe number of symbols occupied by the radio resource control information,

the number of symbols occupied for each time unit (i.e., each slot) in the downlink. n is the serial number of the second time unit where the radio resource control information is located. In the uplink or downlink of the NR network, each subframe has a length of 10^-3s, each sonThe frame includes 2^μ1A time slot, each time slot including

The number of symbols, and therefore,

i.e. the length of each symbol in the uplink or downlink within the NR network. Here, it should be noted that

The corresponding time is the boundary of a subframe in the sidelink, and equation (15) can also be expressed as

As for the later paragraph, ceil [ 2 ]]The formula (rounded up in the sign) can be modified and replaced in the same manner as described above if a similar situation occurs. The detailed description of the process will not be repeated hereinafter.

The above equation (15) will be briefly described with reference to fig. 8. Fig. 8 is a schematic diagram of another timing diagram of a downlink and a sidelink according to an embodiment of the present disclosure. In the present embodiment, when considering the uplink synchronization problem, one timing advance t4 is present between the downlink and the sidelink between the first terminal device and the second terminal device. And, in a specific implementation,

Wherein N is_TAIs a predefined time advance between the uplink and downlink between the network device and the first terminal device. Tc is a system basic time unit of the NR network, and TS is a system basic time unit of the LTE network. As can be seen from the foregoing, the time unit offset K is the time unit offset of the first time unit corresponding to the second time T2 with respect to the reference time unit, and then the reference time is determinedThe relationship between the start time T4 of the inter cell and the second time T2 at which the first sidelink data is transmitted is as follows:

in the NR network, the number of symbols occupied by the rrc message and the sequence number of the occupied symbols are not fixed. Therefore, it can be obtained that the relationship between the first time T1 when the network device transmits the radio resource control information and the starting time T3 of the second time unit in which the radio resource control information is located is as follows:

combining the above equation (17) and the number n of the second time unit, the starting time T4 of the reference time unit satisfies the following equation:

finally, the above equation (15) can be obtained by substituting the above equation (18) into the above equation (16).

In another specific implementation, the first time T1 may be a time corresponding to a starting symbol of the radio resource control information (i.e., the first time T1 may be an absolute time corresponding to a first symbol of the one or more symbols occupied by the radio resource control information). At this time, the relationship between the first time T1 and the starting time T3 of the second time unit is as follows:

By substituting the above equation (17') into the above equations (16) and (18), it can be determined that the correspondence between the second time T2 and the time cell offset amount K satisfies the following equation:

when the time unit offset K determined by the formula (15) or (15') is adopted, the factor of the position of the radio resource control information in the second time unit is fully considered, so that the network device can accurately schedule the time domain resources for the first terminal device under different mobile communication systems, the interference between different communication links caused by unreasonable scheduling of the time domain resources is reduced, and the applicability and the practicability of the mobile communication system are improved.

The second embodiment:

in this embodiment, the network system of the network device is an NR network, and the network systems of the first terminal device and the second terminal device are LTE networks. The first subcarrier spacing of the downlink is different from the second subcarrier spacing of the sidelink. The first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz. Mu.1 and mu.2 are both positive integers greater than or equal to 0, and mu.1 ≠ mu.2. Preferably, μ 2 ═ 0. That is, in the present embodiment, the time units that can be scheduled in the sidelink are subframes, and each subframe has a length of 10 ^-3And s. The time units that can be scheduled in the downlink are time slots. Each subframe in the downlink has a length of 10^-3And s. Each subframe contains 2^μ1A time slot, each time slot having a length of

In a specific implementation, after determining the second time T2, the network device may determine the time unit offset K according to the following formula (19):

here, the formula (19) expresses the first time T1,The second time T2, etc. and the time unit offset K. The first time T1 is a time corresponding to an end symbol of the rrc message (i.e., the first time T1 may be an absolute time corresponding to a last symbol of the one or more symbols occupied by the rrc message). The time unit offset K indicates the offset for granularity in terms of one time unit in the downlink. In the formula (19), S_RRCA sequence number, L, of a first symbol of the one or more symbols occupied by the RRC message_RRCThe number of symbols occupied by the radio resource control information,

the number of symbols occupied for each time unit (i.e., each slot) in the downlink. n is the serial number of the second time unit where the radio resource control information is located. t5 is the subframe timing offset between downlink and sidelink, i.e. the time offset between time cell with sequence number 0 in downlink and time cell with sequence number 0 in sidelink due to different factor carrier spacing. It should be noted that the subframe timing offset t5 is an offset, t5 in equation (19) is a negative value when the downlink is earlier than the sidelink by an offset t5, and t5 in equation (19) is a positive value when the downlink is later than the sidelink by an offset t 5. In the uplink or downlink of the NR network, each subframe has a length of 10 ^-3s, each subframe contains 2^μ1A time slot, each time slot including

The number of symbols, and therefore,

i.e. the length of each symbol in the uplink or downlink within the NR network. In the sidelink of an LTE network, each subframe has a length of

I.e. 1 ms.

The above equation (19) will be briefly described with reference to fig. 9. Fig. 9 is a schematic diagram of another timing diagram of a downlink and a sidelink according to an embodiment of the present disclosure. As shown in fig. 9, when considering the uplink synchronization problem, there is also one timing advance t4 between the sidelink and the downlink. Since the first and second subcarriers may belong to different carriers, there will be an intercarrier timing offset T between the first and second subcarriers_cc. Thus, in particular implementations, timing advance

Wherein N is_TAIs a predefined time advance between the uplink and downlink between the network device and the first terminal device. TS is the basic time unit of the system in LTE network, T_cIs the system basic time unit in the NR network. As can be seen from the above, the time unit offset K is the time unit offset of the first time unit corresponding to the second time T2 relative to the reference time unit, and when the subframe timing deviation T5 is considered (as T5 in fig. 9 is a negative value), the relationship between the starting time T4 of the reference time unit and the second time T2 of transmitting the first sidelink data is as follows:

Here, K1 is the time unit offset of the time offset K in the downlink corresponding to the sidelink. Here, since the first subcarrier spacing is different from the second subcarrier spacing, the length of each slot in the downlink is

Each subframe in the sidelink has a length of

I.e. the length of each time unit in the downlink is the length of each time unit in the sidelinkIs/are as follows

And (4) doubling. As shown in fig. 9, assuming that the first subcarrier spacing is 30Khz and the second subcarrier spacing is 15Khz for example, the sequence number of the time unit corresponding to the second time unit with sequence number N in the downlink in the sidelink is N

by substituting this condition into the above equation (20), the following equation can be obtained:

Combining the above equation (22) and the number n of the second time unit, the starting time T4 of the reference time unit satisfies the following condition:

will be provided withThe above equation (19) can be obtained by substituting the conditions into the above equation (20).

as can be seen from equation (22'), the start time T4 satisfies the following condition:

by substituting this condition into the above equation (20), it can be determined that the correspondence between the second time T2 and the time cell offset K satisfies the following equation:

when the time unit offset K determined by the formula (19) or the formula (19') is adopted, the factors such as the position of the radio resource control information in the second time unit, the subframe timing deviation and the like are fully considered, so that the network device can accurately schedule the time domain resources for the first terminal device under different mobile communication systems, the interference between different communication links caused by unreasonable scheduling of the time domain resources is reduced, and the applicability and the practicability of the mobile communication system are improved.

The third embodiment is as follows:

in this embodiment, the network system of the network device is an LTE network, and the network systems of the first terminal device and the second terminal device are NR networks. The first subcarrier spacing of the downlink is the same as the second subcarrier spacing of the sidelink. The first subcarrier spacing is (15 × 2)^μ1) Khz, supraThe second subcarrier spacing is (15 × 2)^μ2) Khz. Wherein, μ 1 ═ μ 2 ═ 0. That is, in the present embodiment, the time units that can be scheduled in the sidelink are time slots, and each time slot has a length of 10^-3And s. The time units which can be scheduled in the sidelink are subframes, and each subframe has the length of 10^-3s。

In a specific implementation, after determining the second time T2, the network device may determine the time unit offset K according to the following formula (23):

here, equation (23) expresses the correspondence between the parameter values such as the first timing T1, the second timing T2, and the like, and the time unit shift amount K. The first time T1 is a time corresponding to an end symbol of the rrc message (i.e., the first time T1 may be an absolute time corresponding to a last symbol of the one or more symbols occupied by the rrc message). The time unit offset K indicates the offset for granularity in terms of one time unit in the sidelink. In the formula (23), the first and second groups,

The number of symbols occupied for each time unit (i.e., each slot) in the downlink. n is the serial number of the second time unit where the radio resource control information is located. S_dataThe sequence number of the first symbol (i.e., the sequence number of the starting symbol) of the one or more symbols occupied by the first sideband data. In the sidelink of the NR network, each subframe is 10 in length^-3s, each subframe contains 2^μ2A time slot, each time slot including

The number of symbols, and therefore,

i.e. the length of each symbol in the uplink or downlink in the NR networkAnd (4) degree. In the downlink of an LTE network, each subframe is of length

I.e. 1 ms.

The above equation (23) will be briefly described with reference to fig. 10. Fig. 10 is a schematic diagram of another timing diagram of a downlink and a sidelink according to an embodiment of the present disclosure. In the present embodiment, when considering the uplink synchronization problem, one timing advance t4 is present between the downlink and the sidelink between the first terminal device and the second terminal device. And, in a specific implementation,

wherein N is_TAIs a predefined time advance between the uplink and downlink between the network device and the first terminal device. Tc is a system basic time unit of the NR network, and TS is a system basic time unit of the LTE network. As can be seen from the foregoing, the time unit offset K is a time unit offset of the first time unit at the second time T2 with respect to the reference time unit. Also, in the sidelink under the NR network, the symbol position of the first sidelink data in the first time unit is not fixed. Therefore, the relationship between the start time T4 of the reference time unit and the second time T2 at which the first sidelink data is transmitted is as follows:

It can be further obtained that the relationship between the first time T1 when the network device transmits the rrc message and the starting time T3 of the second time unit when the rrc message is located is as follows:

combining the above equation (25) and the number n of the second time unit, the starting time T4 of the reference time unit satisfies the following equation:

finally, the above equation (23) can be obtained by substituting the above equation (26) into the above equation (24).

In another specific implementation, if the first time T1 is a time corresponding to a start symbol of the radio resource control information (i.e. the first time T1 may be an absolute time corresponding to a first symbol of one or more symbols occupied by the radio resource control information), a relationship between the first time T1 and the start time T3 of the second time unit is as follows:

T3＝T1 (25’)

from the above equation (25'), the following equation can be determined:

by substituting the formula (25 ') and the formula (26') into the formula (24), it can be determined that the correspondence between the second time T2 and the time cell offset K satisfies the following formula:

when the time unit offset K determined by the formula (23) or (23') is adopted, the factors of the symbol length occupied by the radio resource control information and the specific position of the first side data in the first time unit are fully considered, so that the network device can accurately schedule the time domain resources for the first terminal device under different mobile communication systems, the interference between different communication links caused by unreasonable scheduling of the time domain resources is reduced, and the applicability and the practicability of the mobile communication system are improved.

The fourth embodiment:

in this embodimentThe network system of the network device is an LTE network, and the network systems of the first terminal device and the second terminal device are NR networks. The first subcarrier spacing of the downlink is different from the second subcarrier spacing of the sidelink. The first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz. μ 1 and μ 2 are both positive integers greater than or equal to 0, μ 1 ≠ μ 2, and μ 1 ═ 0. That is, in the present embodiment, the time units that can be scheduled in the downlink are subframes, and each subframe has a length of 10^-3And s. The time units that can be scheduled in the sidelink are time slots. Each subframe in the sidelink has a length of 10^-3And s. Each subframe contains 2^μ2A time slot, each time slot having a length of

In a specific implementation, after determining the second time T2, the network device may determine the time unit offset K according to the following formula (27):

here, equation (27) expresses the correspondence between the parameter values such as the first timing T1, the second timing T2, and the like, and the time unit shift amount K. The first time T1 is a time corresponding to an end symbol of the rrc message (i.e., the first time T1 may be an absolute time corresponding to a last symbol of the one or more symbols occupied by the rrc message). The time unit offset K indicates the offset for granularity in terms of one time unit in the downlink. In the formula (27), L _RRCThe number of symbols occupied by the radio resource control information,

the number of symbols occupied for each time unit (i.e., each slot) in the downlink. n is the serial number of the second time unit where the radio resource control information is located. S_dataThe sequence number of the first symbol (i.e., the sequence number of the starting symbol) of the one or more symbols occupied by the first sideband data. t5 is the subframe timing offset between downlink and sidelink, i.e. the time offset between time cell with sequence number 0 in downlink and time cell with sequence number 0 in sidelink due to different factor carrier spacing. It should be noted that the subframe timing offset t5 is an offset value, when the downlink is earlier than the sidelink by an offset value t5, t5 in equation (27) is a negative value, and when the downlink is later than the sidelink by an offset value t5, t5 in equation (27) is a positive value. In an NR network, each subframe is 10 in length^-3s, each subframe contains 2^μ2A time slot, each time slot including

The number of symbols, and therefore,

i.e. the length of each symbol of the NR network. In the downlink of an LTE network, each subframe is of length

I.e. 1 ms.

The above formula (27) will be briefly described with reference to fig. 11. Fig. 11 is a schematic diagram of another timing diagram of a downlink and a sidelink according to an embodiment of the present disclosure. As shown in fig. 11, when considering the uplink synchronization problem, there is also one timing advance t4 between the sidelink and the downlink. Since the first and second subcarriers may belong to different carriers, there will be an intercarrier timing offset T between the first and second subcarriers _cc. Thus, in particular implementations, timing advance

Wherein N is_TAIs a predefined time advance between the uplink and downlink between the network device and the first terminal device. TS is a system basic time list in LTE networkBit, T_cIs the system basic time unit in the NR network. As can be seen from the foregoing, the time unit offset K is a time unit offset of the first time unit at the second time T2 with respect to the reference time unit. Also, in the sidelink under the NR network, the symbol position of the first sidelink data in the first time unit is not fixed. Therefore, in consideration of the above-described sub-frame timing deviation T5 (as T5 in fig. 11 is a negative value), the relationship between the start time T4 of the reference time unit and the second time T2 at which the first sidelink data is transmitted is as follows:

here, K1 is the time unit offset of the time offset K in the downlink corresponding to the sidelink. Here, since the first subcarrier interval is different from the second subcarrier interval, the length of each subframe in downlink is

Each time slot in the sidelink has a length of

I.e. the length of each time unit in the downlink is the length of each time unit in the sidelink

And (4) doubling. As shown in fig. 11, assuming that the first subcarrier spacing is 15Khz and the second subcarrier spacing is 30Khz for example, the sequence number of the corresponding time unit in the downlink of the second time unit with sequence number N in the sidelink is the same as the sequence number of the corresponding time unit in the downlink

by substituting this condition into the above equation (28), the following equation can be obtained:

combining the above equation (30) and the number n of the second time unit, the starting time T4 of the reference time unit satisfies the following condition:

this condition is substituted into the above equation (29) to obtain the above equation (27).

T3＝T1 (30’)

From the above equation (25'), the starting time T4 satisfies the following condition:

by substituting this condition into equation (29), the pair of the second time T2 and the time cell offset K can be determinedThe corresponding relation satisfies the following formula:

when the time unit offset K determined by the formula (27) or (27') is adopted, the factors such as the position of the radio resource control information in the second time unit, the symbol length occupied by the radio resource control information, the subframe timing deviation and the like are fully considered, so that the network device can accurately schedule the time domain resources for the first terminal device under different mobile communication systems, the interference between different communication links caused by unreasonable scheduling of the time domain resources is reduced, and the applicability and the practicability of the mobile communication system are improved.

S203, the network device transmits radio resource control information indicating a time unit offset K at a first time T1.

In some possible embodiments, after determining the time unit offset K, the network device may determine radio resource control information indicating the time unit offset K. In an alternative implementation manner, the network device may directly include the time unit offset K in the rrc message. In another alternative implementation, the network device may further determine a first identifier corresponding to the time unit offset K from predefined offset indication information, and pack the first identifier in the radio resource control information. It should be noted that the offset indication information includes one or more sets of indication information for indicating correspondence between different time unit offsets and different identifiers. E.g., time unit offset K corresponds to a first identification, time unit offset K1 corresponds to a second identification, etc. Meanwhile, the offset indication information is also predefined in the first terminal device or the second terminal device, so that the subsequent first terminal device and the second terminal device can determine the time unit offset indicated by the offset indication information according to the identifier contained in the radio resource control information. After determining the radio resource control information, the network device performs operations such as encoding on the radio resource control information to obtain a control signaling corresponding to the radio resource control information, and sends the control signaling to the first terminal device when a first time T1 arrives.

S204, the first terminal device receives the radio resource control information at the first time T1 and determines the second time T2 based on the time unit offset K, the first time T1 and the first threshold TH 1.

In some possible embodiments, the first terminal device may detect, in the downlink, a control signaling corresponding to the radio resource control information in real time, and after the first terminal device receives the control signaling from the network device at the first time T1, the first terminal device needs to perform operations such as decoding and data parsing on the control signaling to obtain the radio resource control information. The first terminal device may further determine a time unit offset K according to the rrc message, and determine a second time T2 when the first side row data is transmitted according to the time unit offset K and the first time T1.

Optionally, in a specific implementation, with reference to the scenarios corresponding to the first embodiment and the second embodiment described in step S202, the first terminal device in the LTE network may detect, in real time, the control signaling corresponding to the radio resource control information in the downlink through the NR processing module included in the first terminal device. When the NR processing module receives the control signaling corresponding to the rrc message at the first time T1, the NR processing module may process the control signaling to obtain the rrc message. Then, the first terminal device may control the NR processing module to transmit the radio resource control information to an LTE processing module included in the NR processing module, and process the radio resource control information through the LTE processing module to obtain a time unit offset K. Finally, the first terminal device can determine the second time T2 when it transmits the first sidelink data according to the time unit offset K and the first time T1.

Optionally, in a specific implementation, with reference to the scenarios corresponding to the third embodiment and the fourth embodiment described in step S202, the first terminal device in the NR network may detect the control signaling corresponding to the radio resource control information in the downlink in real time through the LTE processing module included in the first terminal device. When the LTE processing module receives the control signaling corresponding to the radio resource control information at the first time T1, the LTE processing module may process the control signaling to obtain the radio resource control information. Then, the first terminal device may control the LTE processing module to transmit the radio resource control information to an NR processing module included in the LTE processing module, and process the radio resource control information through the NR processing module to obtain a time unit offset K. Finally, the first terminal device can determine the second time T2 when it transmits the first sidelink data according to the time unit offset K and the first time T1.

At S205, the first terminal apparatus transmits the first sidelink data at the second time T2.

In the embodiment of the present application, for different implementation scenarios, one or more of factors such as a specific position of radio resource control information in the second time unit, a specific position of the first side data in the first time unit, a subframe timing deviation, and a length of the radio resource control information are fully considered when determining the time unit offset, so that the network device can accurately schedule time domain resources for the first terminal device located under different mobile communication systems, reduce interference between different communication links due to unreasonable scheduling of the time domain resources, and improve applicability and practicability of the mobile communication system.

EXAMPLE III

Referring to fig. 12, fig. 12 is a schematic flowchart of another method for sending and receiving control information according to an embodiment of the present application. The method for sending and receiving control information provided in this embodiment is applicable to the second application scenario, that is, the network device, the first terminal device, and the second terminal device all belong to an NR network. The control information according to this embodiment is specifically downlink control information. As shown in fig. 12, the method includes the steps of:

S301, the network device determines a second time T2 at which the first terminal device transmits the first sidelink data according to the first threshold TH1 and the first time T1 at which the network device is to transmit downlink control information to the first terminal device of the second network system.

In an alternative implementation, after the network device detects the scheduling request, the network device may obtain a required processing time t1 for the first terminal device to process the downlink control information. The network device may acquire the preparation time t2 required for the first terminal device to prepare the first sidestream data. The network device may also obtain a timing advance t3 between its downlink with the first terminal device and the sidelink between the first terminal device and the second terminal device. Here, the NR network or the LTE network defines the timing advance t 3' of the uplink. The timing advance t 3' is mainly used to solve the uplink synchronization problem before the terminal device with a different physical distance from the network device. That is, the network device may instruct the terminal device with a different physical distance to perform data uplink in a different time period in advance, so that data transmitted by the terminal device with a different physical distance from the network device can arrive at the network device on the same time unit, thereby implementing uplink synchronization. In the LTE network, the timing advance t3 between the sidelink and the downlink is defined as t 3'/2, and this parameter setting will also be used in the embodiment of the present application. Of course, it is understood that the relationship between t3 and t 3' in different networks may be different from that specified in the LTE network, and is not limited herein. Optionally, the processing time t1, the preparation time t2, and the timing advance t3 are predefined in the network device or obtained before the downlink control information is transmitted. Alternatively, the processing time t1 and the preparation time t2 may be predefined sum values in the network device, and are not limited herein. After acquiring the processing time t1, the preparation time t2, and the timing advance t3, the network device may determine the sum of the processing time t1, the preparation time t2, and the timing advance t3 as the first threshold TH 1.

After the network device determines the first threshold TH1, the network device may determine a second time T2 at which the first terminal device transmits the first sidelink data to the second terminal device according to the first threshold TH1 and the first time T1, and by using a communication resource scheduling algorithm pre-configured by the network device. For a specific process, reference may be made to the process of determining the first time T1 described in step S101 in the first embodiment, and details are not repeated here. Here, the second timing T1 should satisfy the condition: t2 is more than or equal to T1+ TH 1. In other words, the second time T2 is not earlier than T1+ TH 1. The communication resource scheduling algorithm may specifically include a round robin algorithm, a fairness algorithm, a maximum carrier-to-interference ratio scheduling algorithm, and the like, which is not limited herein.

S302, the network device determines the time unit offset K of the first time unit of the first side line data transmitted by the first terminal device relative to the second time unit of the first time T1 according to the first time T1 and the second time T2.

In some trusted embodiments, after determining the second time T2, the network device may determine the time unit offset K according to the second time T2 and a predefined correspondence between the second time T2 and the time unit offset K. Here, the time unit offset K is a time unit offset of a first time unit occupied in the sidelink (i.e., a time unit corresponding to the second time T2) when the first terminal device transmits the first sidelink data, with respect to a second time unit corresponding to the first time T1. Here, it should be noted that, for a certain communication link, the corresponding network system and the subcarrier interval are different, and the time unit used by the network device when performing time domain resource scheduling on the communication link is also different. In the present embodiment, for the downlink between the network device and the first terminal device and the sidelink between the first terminal device and the second terminal device in the NR network, the carrier interval of the downlink is (15 × 2) ^μ1) Khz, subcarrier spacing for sidelink (15 × 2)^μ2) Khz. Here, μ 1 and μ 2 are positive integers greater than or equal to 0. If μ 1 and μ 2 are the same, the schedulable time units in the downlink and sidelink are both time slots and the same length. If μ 1 and μ 2 are not the same, the schedulable time units in the downlink and sidelink are both time slots but of different lengths.

The following describes a process of determining the time unit offset K by the network device according to a specific configuration of the subcarrier spacing of the downlink and the sidelink in the second application scenario.

The first implementation mode comprises the following steps:

in this embodiment, the subcarrier spacing of the downlink between the network apparatus and the first terminal apparatus (for convenience of distinction, the first subcarrier spacing will be described below instead of the description) is the same as the subcarrier spacing of the link in which the first terminal apparatus transmits the above-described first sidestream data (for convenience of distinction, the sidelink will be described below instead of the description). The first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz. μ 1 and μ 2 are each a positive integer greater than or equal to 0, and μ 1 ═ μ 2.

In one specific implementation, after determining the second time T2, the network device may determine the time unit offset K according to the following equation (31):

here, equation (31) expresses the correspondence between the parameter values such as the first timing T1, the second timing T2, and the like, and the time unit shift amount K. The first time T1 is a time corresponding to an end symbol of downlink control information (i.e., the first time T1 may be an absolute time corresponding to a last symbol of one or more symbols occupied by the downlink control information). Here, the time unit offset K indicates the offset for granularity in terms of one time unit in the sidelink. In the formula (1), S_DCIA sequence number, L, of a first symbol of the one or more symbols occupied by the downlink control information_DCIThe number of symbols occupied by the downlink control information,

the number of symbols occupied by the second time unit. The length of each time slot in the downlink and the sidelink is the same

Or

The length of each symbol in the downlink and the sidelink is the same, both

S_dataThe serial number of the first symbol in the one or more symbols occupied by the first side row data is used. T1 is the absolute time corresponding to the last symbol in the one or more symbols occupied by the downlink control information. Here, it should be noted that, here, if

The corresponding time is the boundary of a certain time slot in the sidelink, and equation (31) can also be expressed as

The above formula (31) will be briefly described with reference to fig. 13. Fig. 13 is a schematic diagram of another timing diagram of a downlink and a sidelink according to an embodiment of the present disclosure. In the present embodiment, as shown in fig. 13, when considering the uplink synchronization problem, one timing advance t3 exists between the sidelink and the downlink. And, in a specific implementation,

wherein N is_TAIs a predefined time advance between the uplink and downlink between the network device and the first terminal device. Tc is the system basic time of NR networkUnits. As can be seen from the above, the time unit offset K is the time unit offset of the first time unit at the second time T2 relative to the second time unit at the first time T1. In the case where the position of the first sidestream data in the first time unit is not fixed in the NR network, a relationship between the start time T3 of the second time unit and the second time T2 at which the first sidestream data is transmitted is as follows:

finally, the formula (31) is obtained by substituting the formula (33) into the formula (32).

by substituting the above equation (33') into the above equation (32), it can be determined that the correspondence between the second time T2 and the time cell shift amount K satisfies the following equation:

when the time unit offset K determined by the formula (31) or (31') is adopted, the factors such as the position of the radio resource control information in the second time unit, the symbol length occupied by the radio resource control information, the position of the first side row data in the first time unit and the like are fully considered, so that the network device can accurately schedule time domain resources for the first terminal device under different mobile communication systems, the interference between different communication links caused by unreasonable scheduling of the time domain resources is reduced, and the applicability and the practicability of the mobile communication system are improved.

The second embodiment:

in this embodiment, the first subcarrier spacing of the downlink is different from the second subcarrier spacing of the sidelink. The first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz. Mu.1 and mu.2 are both positive integers greater than or equal to 0, and mu.1 ≠ mu.2. That is, in the present embodiment, the length of each slot in the downlink and that in the sidelink are different.

In a specific implementation, after determining the second time T2, the network device may determine the time unit offset K according to the following formula (34):

here, the equation (34) expresses the correspondence between the parameter values of the first timing T1, the second timing T2, and the like, and the time unit shift amount K. The first time T1 may be a time corresponding to an end symbol of the downlink control information (i.e., the first time T1 may be an absolute time corresponding to a last symbol of the one or more symbols occupied by the downlink control information). The time unit offset K indicates the offset for granularity in terms of one time unit in the downlink. In the formula (34), S_DCIFor one or more occupied downlink control information A sequence number of a first symbol of the plurality of symbols. L is_DCIThe number of symbols occupied by the downlink control information.

The number of symbols, and therefore,

i.e. the length of each symbol in the downlink. In the sidelink, each time slot includes

A symbol, each symbol having a length of

The above equation (34) will be briefly described with reference to fig. 14. Fig. 14 is a schematic diagram of another timing diagram of a downlink and a sidelink according to an embodiment of the present disclosure. As shown in fig. 14, when considering the uplink synchronization problem, there is a timing advance t3 between the sidelink and the downlink. Since the first and second subcarriers may belong to different carriers, there will be an intercarrier timing offset T between the first and second subcarriers_CC. Thus, in particular implementations, timing advance

Wherein N is_TAIs a predefined time advance between the uplink and downlink between the network device and the first terminal device. T is_cIs the system basic time unit in the NR network. As can be seen from the above, the time unit offset K is a time unit of the first time unit at the second time T2 relative to the second time unit at the first time T1 The relationship between the start time T3 of the second time unit and the second time T2 at which the first side line data is transmitted, considering that the position of the side line data in the first time unit is not fixed, is shown as follows:

here, K1 is the time unit offset corresponding to the time unit offset K in the downlink in the sidelink. Because the first subcarrier spacing is different from the second subcarrier spacing, the length of each time slot in the downlink is made to be

And (4) doubling. As shown in FIG. 14, the second time unit with the sequence number N in the downlink, and the corresponding time unit in the sidelink, the sequence number is

substituting this condition into the above equation (35) results in the following equation:

Finally, the above equation (34) can be obtained by substituting the above equation (37) into the above equation (36).

by substituting the above equation (37') into the above equation (34), it can be determined that the correspondence between the second time T2 and the time cell shift amount K satisfies the following equation:

in this embodiment, the specific position of the downlink control information in the time unit, the position of the first side data in the second time unit, the subframe timing deviation caused by different subcarrier intervals, and other factors are fully considered in the process of determining the time unit offset K by using the formula (34) or (34'), so that the determined unit offset K is more reasonable, the first terminal device can be ensured to normally transmit the side data on the communication resource configured by the network device, the inter-link interference caused by unreasonable time domain resource scheduling in the mobile communication system is reduced, and the applicability and the practicability of the mobile communication system can be improved.

S303, the network device transmits downlink control information indicating the time unit offset K at the first time T1.

S304, the first terminal device receives the downlink control information at the first time T1, and determines the second time T2 according to the time unit offset K, the first time T1, and the first threshold TH 1.

In a specific implementation, with reference to the scenarios corresponding to the first and second embodiments described in step S302, the first terminal device detects, in real time, a control signaling corresponding to the downlink control information in the downlink. When it receives the control signaling corresponding to the downlink control information at the first time T1, the control signaling may be processed to obtain the downlink control information. Then, the first terminal device may further analyze the downlink control information to obtain a time unit offset K. Finally, the first terminal device can determine the second time T2 when it transmits the first sidelink data according to the time unit offset K and the first time T1.

S305, the first terminal apparatus transmits the first sidelink data at the second time T2.

In the embodiment of the application, for different implementation scenarios, one or more of factors such as a specific position of downlink control information in the second time unit, a specific position of first side data in the first time unit, subframe timing deviation, a length of the downlink control information, and the like are fully considered when determining the time unit offset, so that a network device can accurately schedule time domain resources for a first terminal device in the same mobile communication system, interference between different communication links due to unreasonable scheduling of the time domain resources is reduced, and applicability and practicability of the mobile communication system are improved.

Example four

Referring to fig. 15, fig. 15 is a schematic flowchart of another method for sending and receiving control information according to an embodiment of the present application. The method for sending and receiving control information provided in this embodiment is applicable to the second application scenario, that is, a scenario in which the network device, the first terminal device, and the second terminal device all belong to an NR network. The control information according to the present embodiment is specifically radio resource control information. As shown in fig. 15, the method includes the steps of:

s401, the network device determines a second time T2 at which the first terminal device transmits the first sidelink data, based on the first threshold TH1 and the first time T1 at which it transmits the radio resource control information to the first terminal device.

In an alternative implementation, when the network device detects the scheduling request, the network device may determine the first threshold TH 1. For a specific process, refer to the process of determining the first threshold TH1 described in step S301 in the third embodiment, which is not described herein again.

S402, the network device determines the time unit offset K of the first time unit of the first side line data transmitted by the first terminal device relative to the reference time unit according to the first time T1 and the second time T2.

In some trusted embodiments, after determining the second time T2, the network device may determine the time unit offset K according to the second time T2 and a predefined correspondence between the second time T2 and the time unit offset K. Here, the time unit offset K is a time unit offset of a first time unit (i.e., a time unit corresponding to the second time T2) occupied in the sidelink when the first terminal device transmits the first sidelink data, with respect to a reference time unit. . Here, in a specific implementation, the reference time unit in the downlink is a time unit with a sequence number of 0. The reference time cell in the sidelink is the time cell with sequence number 0 in the sidelink. Here, it should be noted that, for a certain communication link, if the corresponding network system and subcarrier interval are different, the network deviceThe time units used in scheduling the time domain resources may also vary. In the present embodiment, for the downlink between the network device and the first terminal device and the sidelink between the first terminal device and the second terminal device in the NR network, the carrier interval of the downlink is (15 × 2) ^μ1) Khz, subcarrier spacing for sidelink (15 × 2)^μ2) Khz. Here, μ 1 and μ 2 are positive integers greater than or equal to 0. If μ 1 and μ 2 are the same, the schedulable time units in the downlink and sidelink are both time slots and the same length. If μ 1 and μ 2 are not the same, the schedulable time units in the downlink and sidelink are both time slots but of different lengths.

The first implementation mode comprises the following steps:

In one specific implementation, after determining the second time T2, the network device may determine the time unit offset K according to the following equation (38):

here, the equation (38) expresses the correspondence between the parameter values such as the first timing T1, the second timing T2, etc., and the time unit shift amount K. The first time T1 may be wirelessThe time corresponding to the ending symbol of the resource control information (i.e. the first time T1 may be an absolute time corresponding to the last symbol of the one or more symbols occupied by the radio resource control information). Here, the time unit offset K indicates the offset for granularity in terms of one time unit in the sidelink. In the formula (38), S_RRCSequence number, L, of a first symbol of one or more symbols occupied by radio resource control information_RRCThe number of symbols occupied for the radio resource control information,

the number of symbols occupied by the first time cell and the second time cell. The length of each time slot (i.e. time unit) in the downlink and the sidelink is the same

Or

The length of each symbol in the downlink and the sidelink is the same, both

Or

S_dataThe serial number of the first symbol in the one or more symbols occupied by the first side row data is used. n is the serial number of the second time unit where the radio resource control information is located. T1 is the absolute time corresponding to the last symbol in the one or more symbols occupied by the rrc message. Here, it should be noted that, here, if

The corresponding time is the boundary of a certain time slot in the sidelink, and the formula (38) can also be expressed as

The above formula (38) will be briefly described with reference to fig. 16. Fig. 16 is a schematic diagram of another timing diagram of a downlink and a sidelink according to an embodiment of the present disclosure. In the present embodiment, as shown in fig. 16, when considering the uplink synchronization problem, one timing advance t3 exists between the sidelink and the downlink. And, in a specific implementation,

wherein N is_TAIs a predefined time advance between the uplink and downlink between the network device and the first terminal device. Tc is the system basic time unit of the NR network. As can be seen from the foregoing, the time unit offset K is a time unit offset of the first time unit at the second time T2 with respect to the reference time unit. Considering again the case that the position of the first side line data in the first time unit is not fixed, the relationship between the start time T4 of the reference time unit and the second time T2 at which the first side line data is transmitted is as follows:

combining the above equation (40) and the number n of the second time unit, the starting time T4 of the reference time unit satisfies the following equation:

finally, the above equation (38) can be obtained by substituting the above equation (41) into the above equation (39).

in combination with equation (40'), it can be determined that the correspondence between the second time T2 and the time unit offset K satisfies the following equation:

when the time unit offset K determined by the formula (38) or (38') is adopted, the factors such as the position of the radio resource control information in the second time unit, the symbol length occupied by the radio resource control information, the position of the first side row data in the first time unit and the like are fully considered, so that the network device can accurately schedule time domain resources for the first terminal device under different mobile communication systems, the interference between different communication links caused by unreasonable scheduling of the time domain resources is reduced, and the applicability and the practicability of the mobile communication system are improved.

Second embodiment

In such an embodiment, the first subcarrier spacing for the downlink between the network device and the first terminal device is different from the second subcarrier spacing for the sidelink. That is, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz. Mu.1 and mu.2 are both positive integers greater than or equal to 0, and mu.1 ≠ mu.2.

In one specific implementation, after determining the second time T2, the network device may determine the time unit offset K according to the following equation (42):

here, the equation (42) expresses the correspondence between the parameter values such as the first timing T1, the second timing T2, and the like, and the time unit shift amount K. The first time T1 may be a time corresponding to an end symbol of the rrc message (i.e., the first time T1 may be an absolute time corresponding to a last symbol of one or more symbols occupied by the rrc message) and the time unit offset K may be a granularity indication offset of a time unit in a downlink. In the formula (38), S_RRCSequence number, L, of a first symbol of one or more symbols occupied by radio resource control information_RRCThe number of symbols occupied for the radio resource control information,

Or

The length of each symbol in the downlink and the sidelink is the same, both

Or

S_dataThe serial number of the first symbol in the one or more symbols occupied by the first side row data is used. n is the serial number of the second time unit where the radio resource control information is located. T1 is the absolute time corresponding to the last symbol in the one or more symbols occupied by the rrc message. t4 is the subframe timing offset between downlink and sidelink, i.e. the time offset between time cell with sequence number 0 in downlink and time cell with sequence number 0 in sidelink due to different factor carrier spacing. It should be noted that the subframe timing offset t4 is an offset, t4 in equation (19) is a negative value when the downlink is earlier than the sidelink by an offset t4, and t4 in equation (42) is a positive value when the downlink is later than the sidelink by an offset t 4.

The above formula (42) will be briefly described with reference to fig. 17. Fig. 17 is a schematic diagram of another timing diagram of a downlink and a sidelink according to an embodiment of the present disclosure. In the present embodiment, as shown in fig. 17, when considering the uplink synchronization problem, one timing advance t3 is present between the sidelink and the downlink. Since the first and second subcarriers may belong to different carriers, there will be an intercarrier timing offset T between the first and second subcarriers _cc. Thus, in particular implementations, timing advance

Wherein N is_TAIs a predefined time advance between the uplink and downlink between the network device and the first terminal device. TS is the basic time unit of the system in LTE network, T_cIs the system basic time unit in the NR network. As can be seen from the foregoing, the time unit offset K is the time of the first time unit corresponding to the second time T2 relative to the reference time unitThe inter-unit offset. Considering the factors of the non-fixed position of the first side row data in the first time unit and the sub-frame timing deviation, the relationship between the starting time T4 of the reference time unit and the second time T2 of transmitting the first side row data is shown as follows:

here, K1 is the time unit offset of the time offset K in the downlink corresponding to the sidelink. Since the first subcarrier spacing is different from the second subcarrier spacing, the length of each time slot in the downlink is

Each subframe in the sidelink has a length of

And (4) doubling. As shown in fig. 17, taking the first subcarrier spacing as 15Khz and the second subcarrier spacing as 30Khz as an example, the time unit corresponding to the time unit with the sequence number N in the sidelink in the downlink has the sequence number N

substituting the condition into the above formula(43) The following formula is obtained:

combining the above equation (44) and the number n of the second time unit, the starting time T4 of the reference time unit satisfies the following equation:

finally, the formula (42) is obtained by substituting the formula (46) into the formula (44).

In combination with equation (45'), it can be determined that the correspondence between the second time T2 and the time unit offset K satisfies the following equation:

when the time unit offset K determined by the formula (42) or (42') is adopted, the factors such as the position of the radio resource control information in the second time unit, the symbol length occupied by the radio resource control information/the position of the first side row data in the first time unit, the subframe timing deviation and the like are fully considered, so that the network device can accurately schedule the time domain resources for the first terminal device under different mobile communication systems, the interference between different communication links caused by unreasonable scheduling of the time domain resources is reduced, and the applicability and the practicability of the mobile communication system are improved.

S403, the network device transmits the radio resource control information indicating the time unit offset K at the first time T1.

S404, the first terminal device receives the radio resource control information at a first time T1 and determines a second time T2 based on the time unit offset K, the first time T1 and the first threshold TH 1.

In a specific implementation, in combination with the scenarios corresponding to the first and second embodiments described in step S302, the first terminal device detects, in real time, a control signaling corresponding to the radio resource control information in the downlink. When it receives the control signaling corresponding to the rrc message at the first time T1, the control signaling may be processed to obtain the rrc message. The first terminal device may then further parse the rrc message to obtain the time unit offset K. Finally, the first terminal device can determine the second time T2 when it transmits the first sidelink data according to the time unit offset K and the first time T1.

At S405, the first terminal device transmits the first sidelink data to the second terminal device at a second time T2.

In the embodiment of the present application, for different implementation scenarios, one or more of factors such as a specific position of radio resource control information in the second time unit, a specific position of the first side row data in the first time unit, a subframe timing deviation, and a length of the radio resource control information are fully considered when determining the time unit offset, so that the network device can accurately schedule time domain resources for the first terminal device in the same mobile communication system, reduce interference between different communication links due to unreasonable scheduling of the time domain resources, and improve applicability and practicability of the mobile communication system.

Referring to fig. 18, fig. 18 is a schematic structural diagram of a first terminal device according to an embodiment of the present disclosure. As shown in fig. 18, the first terminal device can be applied to the communication system shown in fig. 1, and performs the functions of the first terminal device in the first embodiment. The first terminal device may be the first terminal device itself, or may be an element or module within the first terminal device. The first terminal device may comprise one or more transceiver units 181 and one or more processing units 182. The transceiver unit 181 may be referred to as a transceiver, a transceiver circuit, a transceiver, or the like, and may include at least one antenna and a radio frequency unit. The transceiver unit 181 is mainly used for transceiving radio frequency signals and converting the radio frequency signals into baseband signals, for example, for receiving downlink control information in the first embodiment from a network device. The processing unit 182 is mainly used to perform baseband processing, control the first terminal apparatus, and the like. The transceiver unit 181 and the processing unit 182 may be physically disposed together or may be physically disposed separately, that is, distributed devices. In a specific implementation, the transceiver unit 181 may be formed by one or more boards, and the boards may jointly support a radio access network of a single access system, or may respectively support radio access networks of different access systems. The processing unit 182 further includes a memory for storing necessary instructions and data and a processor. The processor is configured to control the first terminal device to perform necessary actions, for example, to control the first terminal device to execute the operation procedure related to the first embodiment. The memory and processor may serve one or more boards. That is, the memory and processor may be provided separately on each board. Multiple boards may share the same memory and processor. In addition, each single board can be provided with necessary circuits.

In a specific implementation, the transceiver unit 181 is configured to receive downlink control information from the network device at the first time T1. The downlink control information is used to indicate a time unit offset K. The time unit offset K is a time unit offset of a first time unit of the first sidelink data transmitted by the transceiver unit relative to a second time unit of the first time T1. The processing unit 182 is configured to determine a second time T2 when the transceiving unit transmits the first sidelink data according to the time unit offset K received by the transceiving unit, the first time T1 and a first threshold TH 1. Here, T2 ≧ (T1+ th1. the transceiver unit 181 is also configured to transmit the first sidelink data to the second terminal device at the second time T2.

In a possible implementation, the first threshold TH1 is determined by a processing time t1 when the processing unit 182 processes the downlink control information, a preparation time t2 of the first side-row data of the processing unit 182, a transition time t3 of the downlink control information between the first network system and the second network system, and a timing advance t4 between uplink and downlink between the first terminal device and the network device. Alternatively, the first threshold TH1 is predefined.

In one possible embodiment, the first subcarrier spacing of the downlink between the network device and the first terminal device is the same as the second subcarrier spacing of the link where the transceiver unit 181 transmits the first uplink data, and the second time T2 satisfies the following equation:

here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ═ mu 2, S_DCIA sequence number, L, of a first symbol of the one or more symbols occupied by the downlink control information_DCIThe number of symbols occupied by the downlink control information,

the number of symbols occupied by the second time unit.

In one possible embodiment, a first subcarrier spacing of a downlink between the network device and the first terminal device is different from a second subcarrier spacing of a link where the transceiver unit 181 transmits the first uplink data, and the second time T2 satisfies the following equation:

here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ≠ mu 2, S _DCIA sequence number, L, of a first symbol of the one or more symbols occupied by the downlink control information_DCIThe number of symbols occupied by the downlink control information. The granularity of the time unit offset K is the downlinkThe granularity of the time unit of the path and the time unit offset K1 is the time unit of the link for the first terminal device to transmit the first sidelink data.

In one possible embodiment, a first subcarrier spacing of a downlink between the network device and the first terminal device is the same as a second subcarrier spacing corresponding to a link through which the transceiver unit 181 transmits the first uplink data, and the second time T2 satisfies the following equation:

here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz. μ 1 and μ 2 are each a positive integer greater than or equal to 0, μ 1 ═ μ 2, L_DCIThe number of symbols occupied by the downlink control information, S_dataThe serial number of the first symbol in the one or more symbols occupied by the first side row data,

the number of symbols occupied by the second time unit.

In one possible embodiment, the first subcarrier spacing of the downlink between the network device and the first terminal device is different from the second subcarrier spacing of the link where the transceiver unit 181 transmits the first uplink data, and the second time T2 satisfies the following formula:

Here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2)Khz，Mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ≠ mu 2, S_dataThe serial number of the first symbol in the one or more symbols occupied by the first side row data,

the number of symbols occupied by the second time unit. The granularity of the time unit offset K is the time unit of the downlink, and the granularity of the time unit offset K1 is the time unit of the link through which the first terminal device transmits the first sidelink data.

Referring to fig. 19, fig. 19 is a schematic structural diagram of a network device according to an embodiment of the present application. The network device can be used to perform the functions of the network device in the first embodiment. The network device may be the network device itself, or may be an element or module within the network device. For convenience of explanation, only main components of the network device are shown in fig. 19. As can be seen from fig. 19, the network device includes a processor, a memory, a radio frequency circuit, an antenna, and other modules. The processor is mainly used for processing a communication protocol and communication data, controlling a network device, executing a software program, processing data of the software program, and the like. The memory is used primarily for storing software programs and data. The radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves.

When data needs to be sent, the processor performs baseband processing on the data to be sent and outputs baseband signals to the radio frequency circuit, and the radio frequency circuit performs radio frequency processing on the baseband signals and sends the radio frequency signals to the outside in the form of electromagnetic waves through the antenna. When data is transmitted to the network device, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data. For ease of illustration, only one memory and processor are shown in FIG. 19. In an actual device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be provided independently of the processor, or may be integrated with the processor, which is not limited in this embodiment.

In the embodiment of the present application, the antenna and the rf circuit having the transceiving function may be regarded as a transceiving unit of the network device, and the processor having the processing function may be regarded as a processing unit of the network device. As shown in fig. 19, the network device includes a transceiving unit 191 and a processing unit 192. Optionally, a device in the transceiving unit 191 for implementing the receiving function may be regarded as a receiving unit, and a device in the transceiving unit 191 for implementing the transmitting function may be regarded as a transmitting unit, that is, the transceiving unit 191 includes a receiving unit and a transmitting unit. Here, the receiving unit may also be referred to as a receiver, a receiving circuit, or the like. A transmitting unit may also sometimes be referred to as a transmitter, or a transmitting circuit, etc.

In a specific implementation, the processing unit 192 is configured to determine the second time T2 when the first side data is transmitted by the first terminal device according to the first threshold TH1 and the first time T1 when the downlink control information is transmitted to the first terminal device. Here, T2 ≧ T1+ TH 1. The processing unit 192 is further configured to determine a time unit offset K according to the first time T1 and the second time T2. The time unit offset K is a time unit offset of a first time unit of the first side line data transmitted by the first terminal device relative to a second time unit of the first time T1. The transceiver section 191 transmits downlink control information to the first terminal apparatus at the first time T1. Wherein the downlink control information is used to indicate the time unit offset K.

In one possible embodiment, the first threshold TH1 is determined according to a processing time t1 for the first terminal device to process the downlink control information, a preparation time t2 for the first side-row data of the first terminal device, a transition time t3 for the downlink control information between the first network format and the second network format, and a timing advance t4 between uplink and downlink between the first terminal device and the transceiver unit. The first threshold TH1 is predefined.

In one possible embodiment, the first subcarrier spacing of the downlink between the network device and the first terminal device is the same as the second subcarrier spacing of the link where the first terminal device transmits the first sidelink data, and the second time T2 satisfies the following formula:

the number of symbols occupied by the second time unit.

In a possible implementation manner, the first subcarrier spacing of the downlink between the network device and the first terminal device is different from the second subcarrier spacing of the link where the first terminal device transmits the first sidelink data, and the second time T2 satisfies the following formula:

here. The first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ≠ mu 2, S _DCIOne or more symbols occupied by the downlink control informationNumber of the first symbol in (1), L_DCIThe number of symbols occupied by the downlink control information. The granularity of the time unit offset K is the time unit of the downlink, and the granularity of the time unit offset K1 is the time unit of the link through which the first terminal device transmits the first sidelink data.

In one possible embodiment, a first subcarrier spacing of a downlink between the network device and the first terminal device is the same as a second subcarrier spacing of a link where the first terminal device transmits the first sidelink data, and the second time T2 satisfies the following equation:

the number of symbols occupied by the second time unit.

In a possible embodiment, a first subcarrier spacing of a downlink between the network device and the first terminal device is different from a second subcarrier spacing of a link where the first terminal device transmits the first sidelink data, and the second time T2 satisfies the following formula:

Here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ≠ mu 2, S_dataThe serial number L of the first symbol in one or more symbols occupied by the first side row data_DCIThe number of symbols occupied by the downlink control information,

Referring to fig. 20, fig. 20 is a schematic view of another structure of a first terminal device according to an embodiment of the present disclosure. As shown in fig. 20, the first terminal device can be applied to the communication system shown in fig. 1, and performs the functions of the first terminal device in the first embodiment. The first terminal device may be the first terminal device itself, or may be an element or module within the first terminal device. The first terminal device may comprise one or more transceiver units 201 and one or more processing units 202. The transceiver unit 201 may be referred to as a transceiver, a transceiver circuit, a transceiver, or the like, and may include at least one antenna and a radio frequency unit. The transceiver unit 201 is mainly used for transceiving radio frequency signals and converting the radio frequency signals and baseband signals, for example, for receiving downlink control information in the first embodiment from a network device. The processing unit 202 is mainly used for performing baseband processing, controlling the first terminal apparatus, and the like. The transceiver 201 and the processing unit 202 may be physically disposed together or may be physically disposed separately, i.e., distributed devices. In a specific implementation, the transceiver 201 may be formed by one or more boards, and the boards may jointly support a radio access network of a single access system, or may respectively support radio access networks of different access systems. The processing unit 202 also includes a memory for storing necessary instructions and data and a processor. The processor is configured to control the first terminal device to perform necessary actions, for example, to control the first terminal device to execute the operation procedure related to the first embodiment. The memory and processor may serve one or more boards. That is, the memory and processor may be provided separately on each board. Multiple boards may share the same memory and processor. In addition, each single board can be provided with necessary circuits.

In a specific implementation, the transceiver unit 201 is configured to receive downlink control information from the network device at the first time T1. The downlink control information is used to indicate a time unit offset K. The time unit offset K is a time unit offset of a first time unit of the first side row data transmitted by the transceiver unit relative to a reference time unit. The processing unit 202 is configured to determine a second time T2 when the transceiving unit transmits the first sidelink data according to the time unit offset K received by the transceiving unit, the first time T1 and a first threshold TH 1. Here, T2 ≧ (T1+ th1. the transceiver unit 201 is also configured to transmit the first sidelink data to the second terminal apparatus at the second time T2.

In one possible embodiment, the first subcarrier spacing of the downlink between the network device and the first terminal device is the same as the second subcarrier spacing of the link where the transceiver 201 transmits the first side row data. The above-described second timing T2 satisfies the following equation:

here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ═ mu 2, S _RRCA sequence number of a first symbol of the one or more symbols occupied by the rrc message, n being a second time unit of the first time T1 in the downlinkCorresponding serial number, L_RRCThe number of symbols occupied by the radio resource control information,

the number of symbols occupied by the second time unit.

In one possible embodiment, a first subcarrier spacing of a downlink between the network device and the first terminal device is different from a second subcarrier spacing of a link where the transceiver 201 transmits the first uplink data, and the second time T2 satisfies the following equation:

here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ≠ mu 2, S_RRCA sequence number, L, of a first symbol of the one or more symbols occupied by the RRC message_RRCN is a corresponding sequence number of the downlink of the second time unit at the first time T1, which is the number of the symbols occupied by the RRC message,

t5 is the subframe timing offset between the downlink and the link where the transceiver component transmits the first side row data, which is the number of symbols occupied by the second time element. The granularity of the time unit offset K is the time unit of the downlink, and the granularity of the time unit offset K1 is the time unit of the link through which the first terminal device transmits the first sidelink data.

In one possible embodiment, a first subcarrier spacing of a downlink between the network device and the first terminal device is the same as a second subcarrier spacing of a link through which the transceiver 201 transmits the first side row data, and the second time T2 satisfies the following equation:

the number of symbols occupied by the second time unit.

In one possible implementation, the first subcarrier spacing of the downlink between the network device and the first terminal device is different from the second subcarrier spacing of the link where the transceiver 201 transmits the first side row data. The above-described second timing T2 satisfies the following equation:

here, the first subcarrier spacing is (15 × 2) ^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ≠ mu 2, S_dataThe serial number L of the first symbol in one or more symbols occupied by the first side row data_RRCN is a corresponding sequence number of the downlink of the second time unit at the first time T1, which is the number of the symbols occupied by the RRC message,

t5 is the subframe timing offset between the downlink and the link where the transceiver component transmits the first side row data, which is the number of symbols occupied by the second time element.

Referring to fig. 21, fig. 21 is a schematic view of another structure of a network device according to an embodiment of the present application. The network device can be used to perform the functions of the network device in the first embodiment. The network device may be the network device itself, or may be an element or module within the network device. For convenience of explanation, only main components of the network device are shown in fig. 21. As shown in fig. 21, the network device includes a processor, a memory, a radio frequency circuit, an antenna, and other modules. The processor is mainly used for processing a communication protocol and communication data, controlling a network device, executing a software program, processing data of the software program, and the like. The memory is used primarily for storing software programs and data. The radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves.

When data needs to be sent, the processor performs baseband processing on the data to be sent and outputs baseband signals to the radio frequency circuit, and the radio frequency circuit performs radio frequency processing on the baseband signals and sends the radio frequency signals to the outside in the form of electromagnetic waves through the antenna. When data is transmitted to the network device, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data. For ease of illustration, only one memory and processor are shown in FIG. 21. In an actual device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be provided independently of the processor, or may be integrated with the processor, which is not limited in this embodiment.

In the embodiment of the present application, the antenna and the rf circuit having the transceiving function may be regarded as a transceiving unit of the network device, and the processor having the processing function may be regarded as a processing unit of the network device. As shown in fig. 21, the network apparatus includes a transceiving unit 211 and a processing unit 212. Alternatively, a device for implementing a receiving function in the transceiver unit 211 may be regarded as a receiving unit, and a device for implementing a transmitting function in the transceiver unit 211 may be regarded as a transmitting unit, that is, the transceiver unit 211 includes a receiving unit and a transmitting unit. Here, the receiving unit may also be referred to as a receiver, a receiving circuit, or the like. A transmitting unit may also sometimes be referred to as a transmitter, or a transmitting circuit, etc.

In a specific implementation, the processing unit 212 is configured to determine the second time T2 when the first side data is transmitted by the first terminal device according to the first threshold TH1 and the first time T1 when the downlink control information is transmitted to the first terminal device. Here, T2 ≧ T1+ TH 1. The processing unit 212 is further configured to determine a time unit offset K according to the first time T1 and the second time T2. The time unit offset K is a time unit offset of a first time unit of the first side row data transmitted by the first terminal device relative to a reference time unit. The transceiver section 211 transmits downlink control information to the first terminal apparatus at the first time T1. Wherein the downlink control information is used to indicate the time unit offset K.

In a possible implementation manner, the first threshold TH1 is determined according to a processing time t1 of the first terminal device for processing the radio resource control information, a preparation time t2 of the first side row data of the first terminal device, a transition time t3 of the radio resource control information between the first network system and the second network system, and a timing advance t4 between uplink and downlink between the first terminal device and the transceiver unit. Alternatively, the first threshold TH1 is predefined.

In a possible implementation manner, a first subcarrier spacing of a downlink between the network device and the first terminal device is the same as a second subcarrier spacing of a link where the terminal device transmits the first sidelink data, and the second time T2 satisfies the following formula: (NR schedules SL in LTE by RRC)

Wherein the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ═ mu 2, S_RRCA sequence number of a first symbol in the one or more symbols occupied by the rrc message, n is a corresponding sequence number of a second time unit in the downlink where the first time T1 is located, L_RRCThe number of symbols occupied by the radio resource control information,

the number of symbols occupied by the second time unit.

In a possible implementation manner, a first subcarrier spacing of a downlink between the network device and the first terminal device is different from a second subcarrier spacing of a link where the terminal device transmits the first sidelink data, and the second time T2 satisfies the following formula:

here, the first subcarrier spacing is (15 × 2) ^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ≠ mu 2, S_RRCA sequence number, L, of a first symbol of the one or more symbols occupied by the RRC message_RRCThe number of symbols occupied by the RRC message is n, which is the first timeThe corresponding sequence number in the downlink of the second time unit where T1 is located,

t5 is the subframe timing offset between the downlink and the link on which the first side row data is transmitted by the first terminal device, which is the number of symbols occupied by the second time cell. The granularity of the time unit offset K is the time unit of the downlink, and the granularity of the time unit offset K1 is the time unit of the link through which the first terminal device transmits the first sidelink data.

In a possible implementation manner, a first subcarrier spacing of a downlink between the network device and the first terminal device is the same as a second subcarrier spacing of a link where the terminal device transmits the first sidelink data, and the second time T2 satisfies the following formula:

here, the first subcarrier spacing is (15 × 2) ^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ═ mu 2, S_dataThe serial number L of the first symbol in one or more symbols occupied by the first side row data_RRCN is a corresponding sequence number of the downlink of the second time unit at the first time T1, which is the number of the symbols occupied by the RRC message,

the number of symbols occupied by the second time unit.

here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz. Mu.1 and mu.2 are positive integers greater than or equal to 0, mu.1 ≠ mu.2, S_dataThe serial number L of the first symbol in one or more symbols occupied by the first side row data_RRCN is a corresponding sequence number of the downlink of the second time unit at the first time T1, which is the number of the symbols occupied by the RRC message,

T5 is the subframe timing offset between the downlink and the link on which the first side row data is transmitted by the first terminal device, which is the number of symbols occupied by the second time cell.

Referring to fig. 22, fig. 22 is a schematic view of another structure of a first terminal device according to an embodiment of the present disclosure. As shown in fig. 22, the first terminal device can be applied to the communication system shown in fig. 1 to perform the functions of the first terminal device in the first embodiment. The first terminal device may be the first terminal device itself, or may be an element or module within the first terminal device. The first terminal device may comprise one or more transceiver units 221 and one or more processing units 222. The transceiver unit 221 may be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., and may include at least one antenna and a radio frequency unit. The transceiver 221 is mainly used for transceiving radio frequency signals and converting the radio frequency signals into baseband signals, for example, for receiving downlink control information from a network device in the first embodiment. The processing unit 222 is mainly used for performing baseband processing, controlling the first terminal apparatus, and the like. The transceiver 221 and the processor 222 may be physically disposed together or may be physically disposed separately, i.e., distributed devices. In a specific implementation, the transceiver unit 221 may be formed by one or more boards, and a plurality of boards may jointly support a radio access network of a single access system, or may respectively support radio access networks of different access systems. The processing unit 222 also includes a memory for storing necessary instructions and data and a processor. The processor is configured to control the first terminal device to perform necessary actions, for example, to control the first terminal device to execute the operation procedure related to the first embodiment. The memory and processor may serve one or more boards. That is, the memory and processor may be provided separately on each board. Multiple boards may share the same memory and processor. In addition, each single board can be provided with necessary circuits.

In a specific implementation, the transceiver unit 221 is configured to receive the downlink control information from the network device at the first time T1. The downlink control information is used to indicate a time unit offset K. The time unit offset K is a time unit offset of a first time unit of the first sidelink data transmitted by the transceiver unit relative to a second time unit of the first time T1. The processing unit 222 is configured to determine a second time T2 when the transceiving unit transmits the first sidelink data according to the time unit offset K received by the transceiving unit, the first time T1 and a first threshold TH 1. Here, T2 ≧ (T1+ th1. the transceiver 221 is also configured to transmit the first sidelink data to the second terminal apparatus at the second time T2.

In one possible embodiment, the first threshold TH1 is determined according to a processing time t1 when the first terminal device processes the downlink control information, a preparation time t2 of the first side-row data of the first terminal device, and a timing advance t3 between uplink and downlink between the first terminal device and the network device. Alternatively, the first threshold TH1 is predefined.

In a possible embodiment, a first subcarrier spacing of a downlink between the network device and the first terminal device is different from a second subcarrier spacing of a link where the first terminal device transmits the first sidelink data, and the second time T2 satisfies the following formula: (NR schedules SL in NR by DCI)

Here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2) Khz. μ 1 is a positive integer greater than 0, and μ 2 ═ 0. S_DCIA sequence number, L, of a first symbol of the one or more symbols occupied by the downlink control information_DCIN is a number of symbols occupied by the downlink control information, and n is a number of symbols corresponding to the second time unit in a downlink between the network device and the first terminal device Serial number, S_dataThe serial number of the first symbol in the one or more symbols occupied by the first side row data is used. The granularity of the time unit offset K is the time unit of the downlink, and the granularity of the time unit offset K1 is the time unit of the link through which the first terminal device transmits the first sidelink data.

Referring to fig. 23, fig. 23 is a schematic view of another structure of a network device according to an embodiment of the present application. The network device can be used to perform the functions of the network device in the first embodiment. The network device may be the network device itself, or may be an element or module within the network device. For convenience of explanation, only main components of the network device are shown in fig. 23. As shown in fig. 23, the network device includes a processor, a memory, a radio frequency circuit, an antenna, and other modules. The processor is mainly used for processing a communication protocol and communication data, controlling a network device, executing a software program, processing data of the software program, and the like. The memory is used primarily for storing software programs and data. The radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves.

When data needs to be sent, the processor performs baseband processing on the data to be sent and outputs baseband signals to the radio frequency circuit, and the radio frequency circuit performs radio frequency processing on the baseband signals and sends the radio frequency signals to the outside in the form of electromagnetic waves through the antenna. When data is transmitted to the network device, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data. For ease of illustration, only one memory and processor are shown in FIG. 23. In an actual device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be provided independently of the processor, or may be integrated with the processor, which is not limited in this embodiment.

In the embodiment of the present application, the antenna and the rf circuit having the transceiving function may be regarded as a transceiving unit of the network device, and the processor having the processing function may be regarded as a processing unit of the network device. As shown in fig. 23, the network device includes a transceiving unit 231 and a processing unit 232. Optionally, a device for implementing the receiving function in the transceiving unit 231 may be regarded as a receiving unit, and a device for implementing the transmitting function in the transceiving unit 231 may be regarded as a transmitting unit, that is, the transceiving unit 231 includes a receiving unit and a transmitting unit. Here, the receiving unit may also be referred to as a receiver, a receiving circuit, or the like. A transmitting unit may also sometimes be referred to as a transmitter, or a transmitting circuit, etc.

In a specific implementation, the processing unit 232 is configured to determine the second time T2 when the first side data is transmitted by the first terminal device according to the first threshold TH1 and the first time T1 when the downlink control information is transmitted to the first terminal device. Here, T2 ≧ T1+ TH 1. The processing unit 232 is further configured to determine a time unit offset K according to the first time T1 and the second time T2. The time unit offset K is a time unit offset of a first time unit of the first side line data transmitted by the first terminal device relative to a second time unit of the first time T1. The transceiver unit 231 transmits downlink control information to the first terminal apparatus at the first time T1. Wherein the downlink control information is used to indicate the time unit offset K.

Here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2) ^μ2) Khz. μ 1 is a positive integer greater than 0, and μ 2 ═ 0. S_DCIA sequence number, L, of a first symbol of the one or more symbols occupied by the downlink control information_DCIN is a corresponding sequence number of the second time unit in a downlink between the network device and the first terminal device, and S is the number of symbols occupied by the downlink control information_dataThe serial number of the first symbol in the one or more symbols occupied by the first side row data is used. The granularity of the time unit offset K is the time unit of the downlink, and the granularity of the time unit offset K1 is the time unit of the link through which the first terminal device transmits the first sidelink data.

Referring to fig. 24, fig. 24 is a schematic view of another structure of a first terminal device according to an embodiment of the present disclosure. As shown in fig. 24, the first terminal device can be applied to the communication system shown in fig. 1 to perform the functions of the first terminal device in the first embodiment. The first terminal device may be the first terminal device itself, or may be an element or module within the first terminal device. The first terminal device may comprise one or more transceiving units 241 and one or more processing units 242. The transceiver unit 241 may be referred to as a transceiver, a transceiver circuit, a transceiver, or the like, and may include at least one antenna and a radio frequency unit. The transceiver 241 is mainly used for transceiving radio frequency signals and converting the radio frequency signals and baseband signals, for example, for receiving downlink control information from a network device in the first embodiment. The processing unit 242 is mainly used for performing baseband processing, controlling the first terminal apparatus, and the like. The transceiver 241 and the processor 242 may be physically disposed together or may be physically disposed separately, that is, distributed devices. In a specific implementation, the transceiver 241 may be formed by one or more boards, and the boards may support a radio access network of a single access system together, or may support radio access networks of different access systems respectively. The processing unit 242 further includes a memory for storing necessary instructions and data and a processor. The processor is configured to control the first terminal device to perform necessary actions, for example, to control the first terminal device to execute the operation procedure related to the first embodiment. The memory and processor may serve one or more boards. That is, the memory and processor may be provided separately on each board. Multiple boards may share the same memory and processor. In addition, each single board can be provided with necessary circuits.

In a specific implementation, the transceiving unit 241 receives radio resource control information from the network device at a first time T1. The radio resource control information is used for scheduling the first sidelink data. Here, the radio resource control information indicates the time unit offset K. The time unit offset K is a time unit offset of a first time unit of the first side row data transmitted by the first terminal device with respect to a reference time unit. The processing unit 242 determines a second time T2 at which the first side line data is transmitted by the first terminal device according to the time unit offset K, the first time T1 and a first threshold TH 1. Wherein, T2 is not less than (T1+ TH 1). The transmitting/receiving section 241 transmits the first sidelink data to the second terminal device at the second time T2.

In some possible embodiments, the first threshold TH1 is determined according to a processing time t1 when the processing unit 242 processes the rrc message, a preparation time t2 of the first side data of the processing unit 242, and a timing advance t3 between uplink and downlink between the first terminal device and the network device. Alternatively, the first threshold TH1 is predefined.

In some possible embodiments, a first subcarrier spacing of a downlink between the network device and the first terminal device is the same as a second subcarrier spacing of a link where the transceiver unit 241 transmits the first sidelink data, and the second time T2 satisfies the following formula:

In some possible embodiments, a first subcarrier spacing of a downlink between the network device and the first terminal device is different from a second subcarrier spacing of a link where the transceiving unit 241 transmits the first sidelink data, and the second time T2 satisfies the following formula:

here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2)Khz，μ1＝μ2＝0，S_RRCA sequence number, L, of a first symbol of the one or more symbols occupied by the RRC message _RRDThe number of symbols occupied by the radio resource control information,

Referring to fig. 25, fig. 25 is a schematic view of another structure of a network device according to an embodiment of the present application. The network device can be used to perform the functions of the network device in the first embodiment. The network device may be the network device itself, or may be an element or module within the network device. For convenience of explanation, only main components of the network device are shown in fig. 25. As can be seen from fig. 25, the network device includes a processor, a memory, a radio frequency circuit, an antenna, and other modules. The processor is mainly used for processing a communication protocol and communication data, controlling a network device, executing a software program, processing data of the software program, and the like. The memory is used primarily for storing software programs and data. The radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves.

When data needs to be sent, the processor performs baseband processing on the data to be sent and outputs baseband signals to the radio frequency circuit, and the radio frequency circuit performs radio frequency processing on the baseband signals and sends the radio frequency signals to the outside in the form of electromagnetic waves through the antenna. When data is transmitted to the network device, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data. For ease of illustration, only one memory and processor are shown in FIG. 25. In an actual device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be provided independently of the processor, or may be integrated with the processor, which is not limited in this embodiment.

In the embodiment of the present application, the antenna and the rf circuit having the transceiving function may be regarded as a transceiving unit of the network device, and the processor having the processing function may be regarded as a processing unit of the network device. As shown in fig. 25, the network device includes a transceiving unit 251 and a processing unit 252. Alternatively, a device in the transceiver unit 251 for implementing the receiving function may be regarded as a receiving unit, and a device in the transceiver unit 251 for implementing the transmitting function may be regarded as a transmitting unit, that is, the transceiver unit 251 includes a receiving unit and a transmitting unit. Here, the receiving unit may also be referred to as a receiver, a receiving circuit, or the like. A transmitting unit may also sometimes be referred to as a transmitter, or a transmitting circuit, etc.

In a specific implementation, the processing unit 252 is configured to determine the second time T2 when the first terminal device transmits the first sidelink data according to the first threshold TH1 and the first time T1 when the radio resource control information is transmitted to the first terminal device. Here, T2 ≧ T1+ TH 1. The processing unit 252 is further configured to determine a time unit offset K according to the first time T1 and the second time T2. The time unit offset K is a time unit offset of a first time unit of the first side row data transmitted by the first terminal device relative to a reference time unit. The transmitting/receiving section 251 transmits downlink control information to the first terminal apparatus at the first time T1. Wherein the downlink control information is used to indicate the time unit offset K.

In one possible implementation, the first threshold TH1 is determined according to a processing time t1 of the first terminal device for processing the radio resource control information, a preparation time t2 of the first side data of the first terminal device, and a timing advance t3 between uplink and downlink between the first terminal device and the network device. Alternatively, the first threshold TH1 is predefined.

In a possible implementation, a first subcarrier spacing of a downlink between the network device and the first terminal device is the same as a second subcarrier spacing of a link where the first terminal device transmits the first sidelink data, and the second time T2 satisfies the following formula:

In a possible implementation, the first subcarrier spacing of the downlink between the network device and the first terminal device is different from the second subcarrier spacing of the link where the first terminal device transmits the first sidelink data, and the second time T2 satisfies the following formula:

here, the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 × 2)^μ2)Khz，μ1＝μ2＝0，S_RRCA sequence number, L, of a first symbol of the one or more symbols occupied by the RRC message _RRCThe number of symbols occupied by the radio resource control information,

In a specific implementation, the processing unit 252 determines the second time T2 when the first side data is transmitted by the first terminal device according to the first threshold TH1 and the first time T1 when the radio resource control information is transmitted to the first terminal device. Here, T2 ≧ (T1+ TH 1). The processing unit 252 determines the time unit offset K based on the second time T2. Here, the time unit offset K is a time unit offset of a first time unit of the first side line data transmitted by the first terminal device with respect to a second time unit of the first time T1. The transceiver unit 251 transmits, to the first terminal apparatus, radio resource control information indicating the time unit offset K at the first time T1.

Referring to fig. 26, fig. 26 is a schematic structural diagram of a terminal device according to an embodiment of the present application. The terminal device may be configured to implement the operations performed by the first terminal device or the second terminal device in the first embodiment, the second embodiment, the third embodiment, or the fourth embodiment. The terminal device may be the first terminal apparatus or the second terminal device. The terminal device includes: a processor 261, a memory 262, a transceiver 263, and a bus system 264.

The memory 261 includes, but is not limited to, RAM, ROM, EPROM, or CD-ROM, and the memory 261 is used to store relevant instructions and data. The memory 261 stores elements, executable modules or data structures, or subsets thereof, or expanded sets thereof:

and (3) operating instructions: including various operational instructions for performing various operations.

Operating the system: including various system programs for implementing various basic services and for handling hardware-based tasks.

Fig. 26 shows only one memory, but of course, the memory may be provided in plural numbers as necessary.

The transceiver 263 may be a communication module, a transceiver circuit. In this embodiment, the transceiver 263 is used to perform the operations of transmitting the first side data and the like in the first embodiment, the second embodiment, the third embodiment, or the fourth embodiment.

The processor 261 may be a controller, CPU, general purpose processor, DSP, ASIC, FPGA or other programmable logic device, transistor logic device, hardware component, or any combination thereof. The processor 261 may also be a combination of components performing computing functions, including for example, one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

In a specific application, the various components of the terminal device are coupled together by a bus system 264, wherein the bus system 264 may include a power bus, a control bus, a status signal bus, etc., in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 264 in fig. 26. For ease of illustration, it is only schematically drawn in fig. 26.

In a specific implementation, the terminal apparatus may perform the four functions performed by the first terminal device in the first embodiment, the second embodiment, the third embodiment, or the fourth embodiment. For a specific process, reference may be made to the contents of determining, by the first terminal device, the second time, sending, by the first terminal device, the peer data to the second terminal device, and the like, which are described in the foregoing first embodiment, second embodiment, third embodiment, or fourth embodiment, and details thereof are not repeated here.

Referring to fig. 27, fig. 27 is a schematic view of another structure of a network device according to an embodiment of the present application. The network device may be configured to implement the operations performed by the network device in the first embodiment, the second embodiment, the third embodiment, or the fourth embodiment. The network device includes: a processor 271, a memory 272, a transceiver 273, and a bus system 274.

The memory 271 includes, but is not limited to, RAM, ROM, EPROM or CD-ROM, and the memory 271 is used for storing relevant instructions and data. The memory 271 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof:

Fig. 27 shows only one memory, but of course, the memory may be provided in plural numbers as necessary.

The transceiver 273 may be a communication module, transceiver circuit. In this embodiment, the transceiver 273 is configured to perform the operations of transmitting the downlink control information, transmitting the radio resource control information, and the like in the first embodiment, the second embodiment, the third embodiment, or the fourth embodiment.

The processor 271 may be a controller, CPU, general purpose processor, DSP, ASIC, FPGA or other programmable logic device, transistor logic device, hardware component, or any combination thereof. The processor 271 may also be a combination of computing functions, e.g., comprising one or more microprocessors, a combination of a DSP and a microprocessor, or the like.

In particular applications, the various components of the network device are coupled together by a bus system 274, wherein the bus system 274 may include a power bus, a control bus, a status signal bus, etc., in addition to a data bus. For clarity of illustration, however, the various buses are labeled as the bus system 274 in FIG. 27. For ease of illustration, it is only schematically drawn in fig. 27.

In a specific implementation, the network device may perform the four functions performed by the network device in the first embodiment, the second embodiment, the third embodiment, or the fourth embodiment. For a specific process, reference may be made to the contents of determining, by the network device, the first threshold TH1, sending downlink control information to the first terminal device, and the like described in the foregoing first embodiment, second embodiment, third embodiment, or fourth embodiment, and details thereof are not described here again.

It should be noted that, in practical applications, the processor in the embodiment of the present application may be an integrated circuit chip having signal processing capability. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The Processor may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM, enhanced SDRAM, SLDRAM, Synchronous Link DRAM (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memories described in the embodiments of the present application are intended to comprise, without being limited to, these and any other suitable types of memories.

The present application also provides a communication system comprising one or more network devices, one or more first terminal devices and one or more second terminal devices.

The embodiment of the present application further provides a computer-readable medium, on which a computer program is stored, and when the computer program is executed by a computer, the method for transmitting and receiving control information described in the first embodiment, the second embodiment, the third embodiment, or the fourth embodiment is implemented.

The embodiment of the present application further provides a computer program product, and when executed by a computer, the computer program product implements the methods for sending and receiving control information described in the first embodiment, the second embodiment, the third embodiment, or the fourth embodiment.

An embodiment of the present application further provides a communication apparatus, which includes a processor and an interface. The processor is configured to implement the method for sending or receiving control information described in the first embodiment, the second embodiment, the third embodiment, or the fourth embodiment.

It should be understood that the communication device may be a chip, the processor may be implemented by hardware or software, and when implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like. When implemented in software, the processor may be a general-purpose processor implemented by reading software code stored in a memory, which may be integrated in the processor, located external to the processor, or stand-alone.

In the above method embodiments, the implementation may be wholly or partly implemented by software, hardware, firmware or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in, or transmitted from, a computer-readable storage medium to another computer-readable storage medium, for example, from one website, computer, server, or data center, over a wired (e.g., coaxial cable, fiber optics, Digital Subscriber Line (DSL), or wireless (e.g., infrared, wireless, microwave, etc.) network, the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device including one or more integrated servers, data centers, etc., the available medium may be magnetic medium (e.g., floppy disk, hard disk, magnetic tape), optical medium (e.g., high density digital video disc (digital video disc, DVD), or semiconductor media (e.g., Solid State Disk (SSD), etc.

The above description is only a preferred embodiment of the present disclosure, and is not intended to limit the scope of the present disclosure. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for receiving control information, the method comprising:

a first terminal device receives downlink control information from a network device at a first time T1, where the downlink control information is used to schedule first sidelink data, where the downlink control information is used to indicate a time unit offset K, and the time unit offset K is a time unit offset of a first time unit, where the first terminal device sends the first sidelink data, relative to a second time unit where the first time T1 is located;

the first terminal device determines a second time T2 when the first terminal device transmits the first sidelink data according to the time unit offset K, the first time T1 and a first threshold TH1, wherein T2 is ≧ (T1+ TH 1);

the first terminal device transmits the first sidelink data to the second terminal device at the second time T2.

2. The method of claim 1,

the first threshold TH1 is determined according to a processing time t1 for the first terminal device to process the downlink control information, a preparation time t2 for the first side row data of the first terminal device, a transition time t3 for the downlink control information between a first network format and a second network format, and a timing advance t4 between an uplink and a downlink between the first terminal device and the network device; or the like, or, alternatively,

the first threshold TH1 is predefined.

3. The method according to claim 1 or 2, wherein the first subcarrier spacing of the downlink between the network device and the first terminal device is the same as the second subcarrier spacing of the link on which the first terminal device transmits the first uplink data, and the second time T2 satisfies the following formula:

wherein the first subcarrier spacing is (15 × 2)^μ1) Khz, and the second subcarrier spacing is (15 x 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ═ mu 2, S_DCIA sequence number, L, of a first symbol of the one or more symbols occupied by the downlink control information_DCIThe number of symbols occupied by the downlink control information,

The number of symbols occupied by the second time unit.

4. The method according to claim 1 or 2, wherein a first subcarrier spacing of a downlink between the network device and the first terminal device is different from a second subcarrier spacing of a link on which the first terminal device transmits the first uplink data, and the second time T2 satisfies the following formula:

wherein the first subcarrier spacing is (15 × 2)^μ1) Khz, and the second subcarrier spacing is (15 x 2)^μ2)Khz，μ1 and mu 2 are positive integers greater than or equal to 0, mu 1 ≠ mu 2, S_DCIA sequence number, L, of a first symbol of the one or more symbols occupied by the downlink control information_DCIThe granularity of the time unit offset K is the time unit of the downlink, and the granularity of the time unit offset K1 is the time unit of the link where the first terminal device sends the first sidelink data, which is the number of symbols occupied by the downlink control information.

5. The method according to claim 1 or 2, wherein a first subcarrier spacing of a downlink between the network device and the first terminal device is the same as a second subcarrier spacing corresponding to a link on which the first terminal device transmits the first uplink data, and the second time T2 satisfies the following formula:

Wherein the first subcarrier spacing is (15 × 2)^μ1) Khz, and the second subcarrier spacing is (15 x 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ═ mu 2, L_DCIThe number of symbols occupied by the downlink control information, S_dataFor the sequence number of the first symbol of the one or more symbols occupied by the first sideband data,

the number of symbols occupied by the second time unit.

6. The method according to claim 1 or 2, wherein a first subcarrier spacing of a downlink between the network device and the first terminal device is different from a second subcarrier spacing of a link on which the first terminal device transmits the first uplink data, and the second time T2 satisfies the following formula:

wherein the first subcarrier spacing is (15 × 2)^μ1) Khz, and the second subcarrier spacing is (15 x 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ≠ mu 2, S_dataFor the sequence number of the first symbol of the one or more symbols occupied by the first sideband data,

the granularity of time unit offset K is the time unit of the downlink, and the granularity of time unit offset K1 is the time unit of the link where the first terminal device sends the first sidelink data, for the number of symbols occupied by the second time unit.

7. A method for transmitting control information, the method comprising:

the network device determines a second time T2 when the first terminal device sends the first side row data according to a first threshold TH1 and a first time T1 when the network device is about to send downlink control information to the first terminal device, wherein T2 is more than or equal to T1+ TH 1;

the network device determines a time unit offset K according to the first time T1 and the second time T2, where the time unit offset K is a time unit offset of a first time unit of the first sidelink data sent by the first terminal device relative to a second time unit of the first time T1;

the network device sends downlink control information to the first terminal device at the first time T1, where the downlink control information is used to indicate the time unit offset K.

8. The method of claim 7,

The first threshold TH1 is predefined.

9. The method according to claim 7 or 8, wherein the first subcarrier spacing of the downlink between the network device and the first terminal device is the same as the second subcarrier spacing of the link where the first terminal device transmits the first uplink data, and the second time T2 satisfies the following formula:

the number of symbols occupied by the second time unit.

10. The method according to claim 7 or 8, wherein a first subcarrier spacing of a downlink between the network device and the first terminal device is different from a second subcarrier spacing of a link on which the first terminal device transmits the first uplink data, and the second time T2 satisfies the following formula:

wherein the first subcarrier spacing is (15 × 2) ^μ1) Khz, and the second subcarrier spacing is (15 x 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ≠ mu 2, S_DCIA sequence number, L, of a first symbol of the one or more symbols occupied by the downlink control information_DCIThe granularity of the time unit offset K is the time unit of the downlink, and the granularity of the time unit offset K1 is the time unit of the link where the first terminal device sends the first sidelink data, which is the number of symbols occupied by the downlink control information.

11. The method according to claim 7 or 8, wherein the first subcarrier spacing of the downlink between the network device and the first terminal device is the same as the second subcarrier spacing corresponding to the link where the first terminal device transmits the first uplink data, and the second time T2 satisfies the following formula:

wherein the first subcarrier spacing is (15 × 2)^μ1) Khz, and the second subcarrier spacing is (15 x 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ═ mu 2, L_DCIThe number of symbols occupied by the downlink control information, S_dataOne or more occupied for the first sidelink dataThe sequence number of the first one of the symbols,

The number of symbols occupied by the second time unit.

12. The method according to claim 7 or 8, wherein a first subcarrier spacing of a downlink between the network device and the first terminal device is different from a second subcarrier spacing of a link on which the first terminal device transmits the first uplink data, and the second time T2 satisfies the following formula:

wherein the first subcarrier spacing is (15 × 2)^μ1) Khz, and the second subcarrier spacing is (15 x 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ≠ mu 2, S_dataA serial number, L, of a first symbol of the one or more symbols occupied by the first sideband data_DCIThe number of symbols occupied by the downlink control information,

the granularity of the time unit offset K is the time unit of the downlink, and the granularity of the time unit offset K1 is the time unit of the link where the first terminal device sends the first sidelink data, for the number of symbols occupied for the second time unit.

13. A method for receiving control information, the method comprising:

a first terminal device receives radio resource control information from a network device at a first time T1, the radio resource control information being used for scheduling first sidelink data, wherein the radio resource control information is used for indicating a time unit offset K, and the time unit offset K is a time unit offset of a first time unit of the first terminal device transmitting the first sidelink data relative to a reference time unit;

14. The method of claim 13,

the first threshold TH1 is determined according to a processing time t1 of the first terminal device for processing the radio resource control information, a preparation time t2 of the first side row data of the first terminal device, a transition time t3 of the radio resource control information between a first network standard and a second network standard, and a timing advance t4 between an uplink and a downlink between the first terminal device and the network device; or the like, or, alternatively,

the first threshold TH1 is predefined.

15. The method according to claim 13 or 14, wherein the first subcarrier spacing of the downlink between the network apparatus and the first terminal apparatus is the same as the second subcarrier spacing of the link where the first terminal apparatus transmits the first uplink data, and the second time T2 satisfies the following formula:

Wherein the first subcarrier spacing is (15 × 2)^μ1) Khz, describedTwo sub-carriers with a spacing of (15 × 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ═ mu 2, S_RRCA sequence number of a first symbol in the one or more symbols occupied by the rrc message, n is a corresponding sequence number of a second time unit in the downlink where the first time T1 is, L_RRCThe number of symbols occupied by the radio resource control information,

the number of symbols occupied by the second time unit.

16. The method according to claim 13 or 14, wherein a first subcarrier spacing of a downlink between the network device and the first terminal device is different from a second subcarrier spacing of a link where the terminal device transmits the first uplink data, and the second time T2 satisfies the following formula:

wherein the first subcarrier spacing is (15 × 2)^μ1) Khz, the second subcarrier spacing is (15 x 2 mu 2Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ≠ mu 2, SRRC is the serial number of the first symbol in one or more symbols occupied by the radio resource control information, L_RRCN is a corresponding sequence number of the second time unit in the downlink where the first time T1 is,

The number of symbols occupied by the second time unit, t5 isA subframe timing offset between the downlink and a link on which the first terminal device transmits the first side row data, wherein the granularity of the time unit offset K is the time unit of the downlink and the granularity of the time unit offset K1 is the time unit of the link on which the first terminal device transmits the first side row data.

17. The method according to claim 13 or 14, wherein the first subcarrier spacing of the downlink between the network apparatus and the first terminal apparatus is the same as the second subcarrier spacing of the link where the first terminal apparatus transmits the first uplink data, and the second time T2 satisfies the following formula:

wherein the first subcarrier spacing is (15 × 2)^μ1) Khz, and the second subcarrier spacing is (15 x 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ═ mu 2, S_dataA serial number, L, of a first symbol of the one or more symbols occupied by the first sideband data_RRCN is a corresponding sequence number of the second time unit in the downlink where the first time T1 is,

The number of symbols occupied by the second time unit.

18. The method according to claim 13 or 14, wherein a first subcarrier spacing of a downlink between the network apparatus and the first terminal apparatus is different from a second subcarrier spacing of a link on which the first terminal apparatus transmits the first uplink data, and the second time T2 satisfies the following formula:

wherein the first subcarrier spacing is (15 × 2)^μ1) Khz, and the second subcarrier spacing is (15 x 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ≠ mu 2, S_dataA serial number, L, of a first symbol of the one or more symbols occupied by the first sideband data_RRCN is a corresponding sequence number of the second time unit in the downlink where the first time T1 is,

t5 is the subframe timing offset between the downlink and the link where the first side data is transmitted by the first terminal device, which is the number of symbols occupied by the second time unit.

19. A method for transmitting control information, the method comprising:

the network device determines a second time T2 at which the first terminal device transmits first side row data, according to a first threshold TH1 and a first time T1 at which the network device is to transmit radio resource control information to the first terminal device, wherein T2 ≧ (T1+ TH 1);

The network device determines a time unit offset K according to the first time T1 and the second time T2, wherein the time unit offset K is a time unit offset of a first time unit of the first side row data sent by the first terminal device relative to a reference time unit;

the network device transmits radio resource control information to the first terminal device at the first time T1, wherein the radio resource control information indicates the time unit offset K.

20. The method of claim 19,

the first threshold TH1 is determined according to a processing time t1 for the first terminal device to process the radio resource control information, a preparation time t2 for the first side row data of the first terminal device, a transition time t3 for the downlink control information between the first network system and the second network system, and a timing advance t4 between uplink and downlink between the first terminal device and the network device; or the like, or, alternatively,

the first threshold TH1 is predefined.

21. The method according to claim 19 or 20, wherein a first subcarrier spacing of a downlink between the network device and the first terminal device is the same as a second subcarrier spacing of a link where the terminal device transmits the first uplink data, and the second time T2 satisfies the following formula:

Wherein the first subcarrier spacing is (15 × 2)^μ1) Khz, and the second subcarrier spacing is (15 x 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ═ mu 2, S_RRCA sequence number of a first symbol in the one or more symbols occupied by the rrc message, n is a corresponding sequence number of a second time unit in the downlink where the first time T1 is, L_RRCThe number of symbols occupied by the radio resource control information,

the number of symbols occupied by the second time unit.

22. The method according to claim 19 or 20, wherein a first subcarrier spacing of a downlink between the network device and the first terminal device is different from a second subcarrier spacing of a link where the terminal device transmits the first uplink data, and the second time T2 satisfies the following formula:

wherein the first subcarrier spacing is (15 × 2)^μ1) Khz, and the second subcarrier spacing is (15 x 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ≠ mu 2, S_RRCA sequence number, L, of a first symbol of the one or more symbols occupied by the RRC message_RRCN is a corresponding sequence number of the second time unit in the downlink where the first time T1 is,

T5 is a subframe timing offset between the downlink and a link on which the first side row data is transmitted by the first terminal device, for the number of symbols occupied by the second time unit, the granularity of the time unit offset K is the time unit of the downlink, and the granularity of the time unit offset K1 is the time unit of the link on which the first side row data is transmitted by the first terminal device.

23. The method according to claim 19 or 20, wherein the first subcarrier spacing of the downlink between the network apparatus and the first terminal apparatus is the same as the second subcarrier spacing of the link where the first terminal apparatus transmits the first sidelink data, and the second time T2 satisfies the following formula:

The number of symbols occupied by the second time unit.

24. The method according to claim 19 or 20, wherein a first subcarrier spacing of a downlink between the network apparatus and the first terminal apparatus is different from a second subcarrier spacing of a link on which the first terminal apparatus transmits the first uplink data, and the second time T2 satisfies the following formula:

t5 indicating the number of said first side rows for said downlink and said first terminal device transmitting said number of said second time unitsSub-frame timing offset between the links according to the data.

25. A first terminal device, characterized in that the first terminal device comprises:

a transceiver unit, configured to receive downlink control information from a network device at a first time T1, where the downlink control information is used to schedule first sidelink data, where the downlink control information is used to indicate a time unit offset K, and the time unit offset K is a time unit offset of a first time unit of the first sidelink data sent by the transceiver unit relative to a second time unit of the first time T1

A processing unit, configured to determine a second time T2 when the transceiving unit transmits the first sidelink data according to the time unit offset K received by the transceiving unit, the first time T1, and a first threshold TH1, where T2 is ≧ (T1+ TH 1);

the transceiver unit is further configured to send the first sidelink data to a second terminal device at the second time T2.

26. The communication device of claim 25,

the first threshold TH1 is determined according to a processing time t1 for the processing unit to process the downlink control information, a preparation time t2 for the first side-row data of the processing unit, a transition time t3 for the downlink control information between a first network standard and a second network standard, and a timing advance t4 between an uplink and a downlink between the transceiving unit and the network device; or the like, or, alternatively,

the first threshold TH1 is predefined.

27. The communication apparatus according to claim 25 or 26, wherein a first subcarrier spacing of a downlink between the network apparatus and the first terminal apparatus is the same as a second subcarrier spacing of a link on which the transceiving unit transmits the first uplink data, and the second time T2 satisfies the following equation:

the number of symbols occupied by the second time unit.

28. The communication apparatus according to claim 25 or 26, wherein a first subcarrier spacing of a downlink between the network apparatus and the first terminal apparatus is different from a second subcarrier spacing of a link on which the transceiving unit transmits the first uplink data, and the second time T2 satisfies the following equation:

wherein the granularity of the time unit offset K is the time unit of the downlink, the granularity of the time unit offset K1 is the time unit of the link for the first terminal device to transmit the first sidelink data, and the first subcarrier spacing is (15 × 2)^μ1) Khz, and the second subcarrier spacing is (15 x 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ≠ mu 2, S_DCIOne or more symbols occupied by the downlink control information Number of the first symbol in (1), L_DCIThe number of symbols occupied by the downlink control information.

29. The apparatus according to claim 25 or 26, wherein a first subcarrier spacing of a downlink between the network apparatus and the first terminal apparatus is the same as a second subcarrier spacing corresponding to a link through which the transceiver unit transmits the first uplink data, and the second time T2 satisfies the following equation:

the number of symbols occupied by the second time unit.

30. The communication apparatus according to claim 25 or 26, wherein a first subcarrier spacing of a downlink between the network apparatus and the first terminal apparatus is different from a second subcarrier spacing of a link on which the transceiving unit transmits the first uplink data, and the second time T2 satisfies the following equation:

31. A network device, wherein the network device comprises:

a processing unit, configured to determine, according to a first threshold TH1 and a first time T1 at which a transceiver unit included in the network device is to send downlink control information to a first terminal device, a second time T2 at which the first terminal device sends first side row data, where T2 is greater than or equal to T1+ TH 1;

the processing unit is further configured to determine a time unit offset K according to the first time T1 and the second time T2, where the time unit offset K is a time unit offset of a first time unit of the first sidelink data sent by the first terminal device relative to a second time unit of the first time T1;

The transceiver unit is configured to send downlink control information to the first terminal apparatus at the first time T1, where the downlink control information is used to indicate the time unit offset K.

32. The network device of claim 31,

the first threshold TH1 is determined according to a processing time t1 for the first terminal device to process the downlink control information, a preparation time t2 for the first side-row data of the first terminal device, a transition time t3 for the downlink control information between a first network format and a second network format, and a timing advance t4 between an uplink and a downlink between the first terminal device and the transceiver unit; or the like, or, alternatively,

the first threshold TH1 is predefined.

33. The network device according to claim 31 or 32, wherein a first subcarrier spacing of a downlink between the network device and the first terminal device is the same as a second subcarrier spacing of a link where the first terminal device transmits the first sidelink data, and the second time T2 satisfies the following formula:

wherein the first subcarrier spacing is (15 × 2)^μ1) Khz, and the second subcarrier spacing is (15 x 2) ^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ═ mu 2, S_DCIA sequence number, L, of a first symbol of the one or more symbols occupied by the downlink control information_DCIThe number of symbols occupied by the downlink control information,

the number of symbols occupied by the second time unit.

34. The network device according to claim 31 or 32, wherein a first subcarrier spacing of a downlink between the network device and the first terminal device is different from a second subcarrier spacing of a link where the first terminal device transmits the first sidelink data, and wherein the second time T2 satisfies the following formula:

wherein the granularity of the time unit offset K is the time unit of the downlink, the granularity of the time unit offset K1 is the time unit of the link for the first terminal device to transmit the first sidelink data, and the first subcarrier spacing is (15 × 2)^μ1) Khz, and the second subcarrier spacing is (15 x 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ≠ mu 2, S_DCIA sequence number, L, of a first symbol of the one or more symbols occupied by the downlink control information_DCIThe number of symbols occupied by the downlink control information.

35. The network device according to claim 31 or 32, wherein a first subcarrier spacing of a downlink between the network device and the first terminal device is the same as a second subcarrier spacing of a link where the first terminal device transmits the first sidelink data, and the second time T2 satisfies the following formula:

the number of symbols occupied by the second time unit.

36. The network device according to claim 31 or 32, wherein a first subcarrier spacing of a downlink between the network device and the first terminal device is different from a second subcarrier spacing of a link where the first terminal device transmits the first sidelink data, and wherein the second time T2 satisfies the following formula:

wherein the granularity of the time unit offset K is the time unit of the downlink, the granularity of the time unit offset K1 is the time unit of the link for the first terminal device to transmit the first sidelink data, and the first subcarrier spacing is (15 × 2) ^μ1) Khz, and the second subcarrier spacing is (15 x 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ≠ mu 2, S_dataA serial number, L, of a first symbol of the one or more symbols occupied by the first sideband data_DCIThe number of symbols occupied by the downlink control information,

is the number of symbols occupied by the second time unit.

37. A first terminal device, characterized in that the first terminal device comprises:

a transceiving unit, configured to receive, at a first time T1, radio resource control information from a network device, where the radio resource control information is used to schedule first sidelink data, and the radio resource control information is used to indicate a time unit offset K, where the time unit offset K is a time unit offset of a first time unit, where the transceiving unit transmits the first sidelink data, relative to a reference time unit;

a processing unit, configured to determine a second time T2 when the transceiving unit transmits the first side row data according to the time unit offset K, the first time T1, and a first threshold TH1, where T2 is ≧ (T1+ TH 1);

38. The first terminal device of claim 37,

the first threshold TH1 is predefined.

39. The first terminal apparatus of claim 37 or 38, wherein a first subcarrier spacing of a downlink between the network apparatus and the first terminal apparatus is the same as a second subcarrier spacing of a link on which the transceiving unit transmits the first sidelink data, and wherein the second time T2 satisfies the following equation:

wherein the first subcarrier spacing is (15 × 2)^μ1) Khz, and the second subcarrier spacing is (15 x 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ═ mu 2, S_RRCA sequence number of a first symbol of the one or more symbols occupied by the rrc message, where n is a second time T1 Corresponding sequence number, L, of time unit in said downlink_RRCThe number of symbols occupied by the radio resource control information,

the number of symbols occupied by the second time unit.

40. The first terminal device of claim 37 or 38, wherein a first subcarrier spacing of a downlink between the network device and the first terminal device is different from a second subcarrier spacing of a link for transmitting the first uplink data by the transceiving unit, and wherein the second time T2 satisfies the following formula:

t5 is the sub-frame timing offset between the downlink and the link on which the first side-row data is transmitted by the first terminal device, the granularity of the time unit offset K is the time unit of the downlink, and the granularity of the time unit offset K1 is the time unit of the first terminal device And setting a time unit of a link for transmitting the first side row data.

41. The first terminal apparatus of claim 37 or 38, wherein a first subcarrier spacing of a downlink between the network apparatus and the first terminal apparatus is the same as a second subcarrier spacing of a link on which the transceiving unit transmits the first sidelink data, and wherein the second time T2 satisfies the following equation:

the number of symbols occupied by the second time unit.

42. The first terminal device of claim 37 or 38, wherein a first subcarrier spacing of a downlink between the network device and the first terminal device is different from a second subcarrier spacing of a link for transmitting the first uplink data by the transceiving unit, and wherein the second time T2 satisfies the following formula:

Wherein the first subcarrier spacing is (15 × 2)^μ1) Khz, the second sub-groupThe carrier spacing is (15 × 2)^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ≠ mu 2, S_dataA serial number, L, of a first symbol of the one or more symbols occupied by the first sideband data_RRCN is a corresponding sequence number of the second time unit in the downlink where the first time T1 is,

t5 is the subframe timing offset between the downlink and the link where the transceiving unit sends the first side row data, which is the number of symbols occupied by the second time unit.

43. A network device, wherein the network device comprises:

a processing unit, configured to determine a second time T2 at which a first terminal device transmits first sidelink data according to a first threshold TH1 and a first time T1 at which a transceiving unit included in the network device is to transmit radio resource control information to the first terminal device, wherein T2 ≧ (T1+ TH 1);

the processing unit is further configured to determine a time unit offset K according to the second time T2, where the time unit offset K is a time unit offset of a first time unit of the first sidelink data sent by the first terminal device relative to a reference time unit;

The transceiver unit is configured to transmit radio resource control information to the first terminal apparatus at the first time T1, where the radio resource control information is used to indicate the time unit offset K.

44. The method of claim 43,

the first threshold TH1 is determined according to a processing time t1 of the first terminal device for processing the radio resource control information, a preparation time t2 of the first side row data of the first terminal device, a transition time t3 of the radio resource control information between a first network standard and a second network standard, and a timing advance t4 between an uplink and a downlink between the first terminal device and the transceiver unit; or the like, or, alternatively,

the first threshold TH1 is predefined.

45. The network device according to claim 43 or 44, wherein a first subcarrier spacing of a downlink between the network device and the first terminal device is the same as a second subcarrier spacing of a link where the terminal device transmits the first uplink data, and the second time T2 satisfies the following formula:

wherein the first subcarrier spacing is (15 × 2)^μ1) Khz, and the second subcarrier spacing is (15 x 2) ^μ2) Khz, mu 1 and mu 2 are positive integers greater than or equal to 0, mu 1 ═ mu 2, S_RRCA sequence number of a first symbol in the one or more symbols occupied by the rrc message, n is a corresponding sequence number of a second time unit in the downlink where the first time T1 is, L_RRCThe number of symbols occupied by the radio resource control information,

the number of symbols occupied by the second time unit.

46. The network device according to claim 43 or 44, wherein a first subcarrier spacing of a downlink between the network device and the first terminal device is different from a second subcarrier spacing of a link on which the terminal device transmits the first uplink data, and wherein the second time T2 satisfies the following equation:

47. The network device according to claim 43 or 44, wherein a first subcarrier spacing of a downlink between the network device and the first terminal device is the same as a second subcarrier spacing of a link where the terminal device transmits the first uplink data, and the second time T2 satisfies the following formula:

The number of symbols occupied by the second time unit.

48. The network device according to claim 43 or 44, wherein a first subcarrier spacing of a downlink between the network device and the first terminal device is different from a second subcarrier spacing of a link on which the terminal device transmits the first uplink data, and wherein the second time T2 satisfies the following equation:

49. A terminal device, characterized in that the terminal device comprises one or more processors and one or more memories; the one or more memories coupled with the one or more processors, the one or more memories for storing computer program code or computer instructions;

The computer instructions, when executed by the one or more processors, cause the terminal device to perform the method of any of claims 1-6 or the method of any of claims 13-18.

50. A network device, comprising one or more processors and one or more memories; the one or more memories coupled with the one or more processors, the one or more memories for storing computer program code or computer instructions;

the computer instructions, when executed by the one or more processors, cause the terminal device to perform the method of any one of claims 7-12 or the method of any one of claims 19-24.

51. A computer-readable storage medium, characterized in that it stores computer instructions or a program which, when run on a computer, causes the computer to perform the method of any of claims 1-6 or the method of any of claims 13-18.

52. A computer-readable storage medium, characterized in that it stores computer instructions or a program which, when run on a computer, causes the computer to perform the method of any of claims 7-12 or the method of any of claims 19-24.