WO2018202116A1

WO2018202116A1 - Communication method, network device and terminal device

Info

Publication number: WO2018202116A1
Application number: PCT/CN2018/085563
Authority: WO
Inventors: 任海豹; 李元杰
Original assignee: 华为技术有限公司
Priority date: 2017-05-05
Filing date: 2018-05-04
Publication date: 2018-11-08
Also published as: CN108811075B; CN108811075A

Abstract

Provided in the present application are a communication method, network device and terminal device. The present application can meet the precision requirements for timing advance (TA) for different frequency bands, thereby enabling more precise uplink synchronization. The method comprises: a network device determining a first timing advance of a terminal device on a first component carrier; and the network device transmitting a first message to the terminal device, the first message comprising the first timing advance, wherein a timing adjusting unit of the first timing advance is related to the first component carrier.

Description

Communication method, network device and terminal device

The present application claims the priority of the Chinese Patent Application, which is filed on May 5, 2017, the Chinese Patent Application No. PCT Application No. in.

Technical field

The present application relates to the field of communications, and more particularly to a communication method, a network device, and a terminal device.

Background technique

In the prior art, in order to enable the uplink signal sent by the terminal device to reach the network device at a predetermined time, the terminal device needs to send an uplink signal in advance. Here, the time at which the terminal device sends the uplink signal in advance is determined according to a timing advance (TA).

In the prior art, since the system bandwidth is fixed and the system sampling rate is also fixed, a unified method can be used to calculate the TA adjustment amount. In the new radio access technology (NR) system, both high frequency (above 6 GHz) and low frequency (below 6 GHz) are supported. In the high frequency, the bandwidth is large, and the sampling rate of the system is high; in the low frequency, the bandwidth is small, and the sampling rate of the system is small. At this time, the prior art TA scheme has not been applied. Therefore, there is a need for a TA solution suitable for use in an NR system.

Summary of the invention

The present application provides a communication method, a network device, and a terminal device, which can meet the requirements of TA accuracy in different frequency bands, thereby enabling uplink synchronization to be performed more accurately.

In a first aspect, a communication method is provided, including: determining, by a network device, a first timing advance of a terminal device on a first carrier unit; the network device sending a first message to the terminal device, the first message The first timing advance amount is included, wherein a timing adjustment unit of the first timing advance amount is related to the first carrier unit.

According to the communication method of the present application, the corresponding TA adjustment amount can be determined according to the timing adjustment unit related to the carrier, and the requirements of the TA accuracy of the different frequency bands can be satisfied, so that the uplink synchronization can be performed more accurately.

In a possible implementation, the first carrier unit belongs to one of all carrier units included in the first timing advance group, and the timing advance on the all carrier units is the first timing advance. the amount.

In a possible implementation manner, the timing adjustment unit is determined according to a first sampling clock, and the first sampling clock is one of sampling clocks of all the carrier units.

In a possible implementation manner, the timing adjustment unit is determined according to a second sampling clock, where the second sampling clock is a system-defined minimum sampling clock.

In a possible implementation manner, the timing adjustment unit is determined according to a first carrier frequency point, where the first carrier frequency point is one of all carrier frequency points corresponding to the all carrier units, The carrier frequency point is in one-to-one correspondence with the carrier unit.

In a possible implementation, the first timing advance is a timing advance of the first timing process, and the first timing process is one of multiple timing processes corresponding to the first carrier unit. a plurality of timing advances corresponding to the plurality of timing processes are a plurality of timing advances corresponding to the plurality of sets of uplink transmission resources, wherein the plurality of timing processes are in one-to-one correspondence with the plurality of timing advance amounts The plurality of sets of uplink transmission resources are in one-to-one correspondence with the plurality of timing advance amounts.

In a possible implementation manner, the uplink transmission resource is any one of the following:

The set of antenna ports for uplink transmission, the beam for uplink transmission, the beam group for uplink transmission, and the uplink sounding reference signal SRS resources.

A second aspect provides a communication method, including: receiving, by a terminal device, a first message sent by a network device, where the first message includes a first timing advance amount of the terminal device on the first carrier unit; Determining, by the timing adjustment unit of the first timing advance amount and the first timing advance amount, a first timing advance adjustment amount, where the first timing advance adjustment amount is used to adjust an uplink signal on the first carrier unit Send time.

Therefore, according to the communication method of the present application, the corresponding TA adjustment amount can be determined according to the timing adjustment unit related to the carrier, and the requirement of the TA accuracy of the different frequency bands can be satisfied, so that the uplink synchronization can be performed more accurately.

In a possible implementation, the first sampling clock is a minimum sampling clock of sampling clocks corresponding to all the carrier units, and the minimum sampling clock is determined according to a maximum carrier bandwidth of all the carrier units. Or, the first sampling clock is a maximum sampling clock that can be divided by a sampling clock corresponding to all the carriers.

In a possible implementation manner, the method further includes:

The terminal device determines an effective time of the first timing advance adjustment amount.

In a possible implementation manner, the first carrier unit belongs to a first timing advance group, and a timing advance amount on all carrier units included in the first timing advance group is the first timing advance amount;

Determining, by the terminal device, an effective time of the timing advance adjustment amount, including:

The terminal device determines the effective time according to the first parameter set of the plurality of parameter sets included in the first timing advance group.

In a possible implementation, the first timing advance is a timing advance of the first timing process, and the first timing process is one of multiple timing processes corresponding to the first carrier unit. The timing advance corresponding to the first timing process is a timing advance corresponding to a group of the plurality of uplink transmission resources.

A third aspect provides a communication method, including: determining, by a network device, a timing advance of at least one timing process in a same carrier unit, where the at least one timing process corresponds to at least one group of resources of multiple sets of uplink transmission resources; The network device sends a second message to the terminal device, the second message including a timing advance of the at least one process.

The prior art TA solution is only for one network device, and cannot dynamically support dynamic switching of network devices for uplink reception under different premise of different network devices. The communication method of the embodiment of the present application, by introducing multiple TA processes, each TA process corresponding to one network device, can dynamically perform the handover of the receiving network device to receive the terminal device by dynamically indicating the timing advance of different processes. Uplink transmission signal.

The uplink transmission resource may also be other uplink resources, which is not limited in this application.

In a possible implementation manner, the second message further includes at least one first indication information, where the at least one first indication information is in one-to-one correspondence with a timing advance of the at least one timing process, the first The indication information is used to determine a timing progression of the timing advance amount corresponding to the first indication information, and the at least one first indication information is different.

Optionally, the first indication information is an identity (ID) of a corresponding uplink transmission resource.

Optionally, the relative position between the plurality of first indication information is determined according to an index of an uplink transmission resource.

In a possible implementation, before the sending, by the network device, the second message to the terminal device, the method further includes:

The network device sends configuration information to the terminal device, where the configuration information is used to indicate a correspondence between the multiple groups of uplink transmission resources and the at least one timing process.

Optionally, the configuration information is a random access response message.

Optionally, the configuration information is a Radio Resource Control (RRC) message.

Optionally, the configuration information further includes an initial timing value of each timing process.

Optionally, in a possible implementation manner, the method further includes:

The network device sends an uplink transmission resource switching message to the terminal device, where the uplink transmission resource switching message can be used to instruct the terminal device to use a timing process and a timing advance corresponding to the switched uplink transmission resource. Uplink transmission.

Optionally, the multiple timing processes in the first carrier unit may be in one-to-one correspondence with the multiple uplink transmission resources by using a preset rule.

Optionally, as a preset rule, a timing process corresponds to a beam or a beam group, and when the transmission or the beam group is configured, the corresponding timing process is implicitly determined. Optionally, the ID of the beam or beam group can be used as the ID of the timing process.

Optionally, as another preset rule, a timing process corresponds to a group of uplink SRS resources, and when the SRS resource is configured, the corresponding timing process is implicitly determined. Optionally, the ID of the SRS resource may be used as the ID of the timed process.

Optionally, as another preset rule, a timing process corresponds to a group of antenna port groups. Optionally, the antenna port grouping may be reported to the terminal device by using a terminal device or a network device. Optionally, the ID of the antenna port packet may be used as the ID of the timing process.

Optionally, as another preset rule, a timing process corresponds to a group of antenna panels. Optionally, the antenna panel may be configured by the terminal device or configured by the network device to the terminal device. Optionally, the ID of the antenna panel can be used as the ID of the timing process.

A fourth aspect provides a communication method, including: a second message sent by a terminal device network device, where the second message includes at least one timing advance amount in the same carrier unit, and the at least one timing advance amount and at least one The timing processes are in one-to-one correspondence, and the at least one timing advance amount is in one-to-one correspondence with at least one group of uplink transmission resources;

The terminal device determines a first timing advance adjustment amount according to a first timing advance amount of the at least one timing advance amount, where the first timing advance amount corresponds to a first timing progress in the at least one timing process.

In a possible implementation, before the second message sent by the terminal device network device, the method further includes:

The terminal device receives configuration information sent by the network device, where the configuration information is used to indicate the at least one group of uplink transmission resources and the at least one timing process.

Optionally, the configuration information is a random access response message.

Optionally, in a possible implementation manner, the method further includes:

Receiving, by the terminal device, a beam switching message sent by the network device to the network device;

Determining, by the terminal device, a second timing advance amount of the at least one timing advance amount according to the beam switching message, and determining a second timing advance adjustment amount according to the second timing advance amount, the second timing advance amount Corresponding to a second timing process in the at least one timing process.

Optionally, as another preset rule, a timing process corresponds to a group of uplink SRS resources, and when the SRS resource is configured, the corresponding timing process is implicitly determined. Optionally, the ID of the SRS resource can be used as the ID of the timing process.

Optionally, as another preset rule, a timing process corresponds to a group of antenna port groups. Optionally, the antenna port grouping may be reported to the terminal device by using a terminal device or a network device. Optionally, the ID of the antenna port group may be used as the ID of the timing process.

In a fifth aspect, a network device is provided for performing the method in the first aspect, any possible implementation of the first aspect, the third aspect, or the method in any possible implementation of the third aspect. In particular, the network device comprises means for performing the method of the first aspect or any possible implementation of the first aspect, or the network device comprises any possible implementation for performing the third aspect or the third aspect The unit of the method.

The sixth aspect provides a terminal device for performing the method in the second aspect, any possible implementation manner of the second aspect, the fourth aspect, or the method in any possible implementation manner of the fourth aspect. In particular, the terminal device comprises means for performing the method of any of the second aspect or any of the possible implementations of the second aspect, or the terminal device comprises any possible implementation for performing the fourth or fourth aspect The unit of the method.

In a seventh aspect, a network device is provided, the network device comprising a memory and a processor, the memory for storing a computer program, the processor for calling and running the computer program from the memory, such that the network device performs the first Aspects and methods of any of the possible implementations of the first aspect, or methods of any of the possible implementations of the third or third aspect described above.

In an eighth aspect, a terminal device is provided, the terminal device comprising a memory and a processor, the memory for storing a computer program, the processor for calling and running the computer program from the memory, so that the terminal device performs the second Aspects and methods of any of the possible implementations of the second aspect, or methods of any of the above-described fourth or fourth aspects of the fourth aspect.

In a ninth aspect, a computer readable storage medium is provided for storing a computer program, the computer program comprising instructions for performing the methods of the above aspects and any of the possible implementations of the above aspects.

In a tenth aspect, a computer program product comprising instructions, when executed on a computer, causes the computer to perform the methods of the above aspects and any of the possible implementations of the above aspects.

In an eleventh aspect, the present application provides a chip system including a processor for supporting a data transmitting device to implement the functions involved in the above aspects, such as, for example, generating or processing data involved in the above method and / or information. In one possible design, the chip system further includes a memory for holding program instructions and data necessary for the data transmitting device. The chip system can be composed of chips, and can also include chips and other discrete devices.

DRAWINGS

1 is a schematic diagram of a communication system that can be applied to the present application.

2 is a schematic flow chart of a communication method according to the present application.

3 is a schematic flow chart of another communication method according to the present application.

4 is a schematic block diagram of a network device in accordance with the present application.

FIG. 5 is a schematic block diagram of a terminal device according to the present application.

6 is a schematic block diagram of another network device in accordance with the present application.

FIG. 7 is a schematic block diagram of another terminal device according to the present application.

detailed description

The technical solutions in the present application will be described below with reference to the accompanying drawings.

It should be understood that the technical solution of the present application can be applied to various communication systems, for example, a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, and a wideband code division. Wideband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, advanced long term evolution (LTE-A) System, universal mobile telecommunication system (UMTS), 5G system, etc. It should be understood that the 5G system may also be referred to as a new radio access technology (NR) system.

The network device in this application may be a base transceiver station (BTS) in a GSM system or a CDMA system, or a base station (NodeB) in a WCDMA system, or an evolved base station in an LTE system (evolutional Node B). The eNB or the eNodeB, or the transmission reception point (TRP) in the NR system, is not particularly limited in this embodiment of the present application.

In addition, the network device involved in the embodiment of the present application may be a network device adopting a CU-DU architecture. The network device that performs the method of the embodiment of the present application may be a centrialized unit (CU) or a distributed unit (DU), where the CU may also be referred to as a central unit or a control. Control unit.

In this application, a terminal device may be referred to as an access terminal, a user equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, and a wireless device. Communication device, user agent or user device. The access terminal can be a cellular telephone, a handheld device with wireless communication capabilities, a computing device or other processing device connected to the wireless modem, an in-vehicle device, a wearable device, and a user device in a 5G communication system.

FIG. 1 illustrates a wireless communication system 100 suitable for use with embodiments of the present application. The wireless communication system 100 can include at least one network device and at least one terminal device, such as the network device 110, the terminal device 120, and the terminal device 130 illustrated in FIG. The network device 110 can communicate with the terminal device 120 and the terminal device 130 through a wireless air interface. In order to ensure that the uplink signal sent by the terminal device 120 and the terminal device 130 arrives at the network device 110 at a predetermined time, an uplink synchronization advance (Uplink Timing Advance) mechanism is required for uplink synchronization. In this way, the network device can control the time when the uplink signals from different terminal devices arrive at the network device by appropriately controlling the offset of each terminal device. For a terminal device that is far away from the network device, because there is a large transmission delay, the uplink device is sent in advance than the terminal device that is closer to the network device.

In the prior art, since the system bandwidth is fixed and the system sampling rate is also fixed, a unified method can be used to calculate the TA adjustment amount. In the new radio access technology (NR) system, both high frequency (above 6 GHz) and low frequency (below 6 GHz) are supported. In the high frequency, the bandwidth is large, and the sampling rate of the system is high; in the low frequency, the bandwidth is small, and the sampling rate of the system is small. At this time, the prior art TA scheme has not been applied. Therefore, there is a need for a TA solution suitable for use in an NR system. To this end, the present application provides a communication method capable of solving the above problems.

It should be understood that the above-mentioned communication system 100 to which the present application is applied is merely an example, and the communication system to which the present application is applied is not limited thereto. For example, the number of network devices and terminal devices included in the communication system may be other numbers.

In addition, in an existing wireless communication system, such as an LTE system, one terminal device has only one, two or at most four antenna ports (Antenna ports), and in the NR, one terminal device may have multiple antenna panels, different The antenna panel can form different beams at the same time, and the timing of the different antenna ports/beam transmission signals on the receiving side on the same terminal device is advanced, and the existing protocol content is not involved. To this end, the present application provides another method of communication.

In order to facilitate the understanding of the present application, the concepts that may be involved in this application are described in detail below.

A beam, which can be understood as a spatial resource, can refer to a transmitting or receiving precoding vector having energy transmission directivity, and can identify the transmitting or receiving precoding vector by using index information. The energy transmission directivity may be that the signal received by the precoding process after receiving the precoding vector has a good receiving power in a certain spatial position, such as satisfying the receiving demodulation signal to noise ratio, etc., the energy transmission directivity. It can also be said that receiving the same signals transmitted from different spatial locations through the precoding vector has different received powers. The same device (such as a network device or a terminal device) may have different precoding vectors. Different devices may have different precoding vectors, that is, corresponding to different beams. For a device configuration or capability, one device can be used at the same time. One or more of a plurality of different precoding vectors, that is, one beam or multiple beams can be formed at the same time. The beam information may be identified by the index information, and the index information may be corresponding to the resource identifier (ID) of the terminal device, such as the ID or resource of the corresponding configured CSI-RS, or the corresponding uplink sounding reference signal (Sounding). Reference Signal (SRS) ID or resource, or may be index information of a signal or channel display or implicit bearer carried by the beam, including but not limited to transmitting a synchronization signal or a broadcast channel or uplink random access through the beam The channel indicates the index information of the beam.

In the embodiment of the present application, the high-layer signaling may be a radio resource control (RRC) signaling or a radio access control element (MAC CE), which is not limited in this embodiment of the present application.

Hereinafter, a communication method according to an embodiment of the present invention will be described in detail with reference to FIGS. 2 and 3.

2 and FIG. 3 is a schematic flowchart of a communication method according to an embodiment of the present invention, showing detailed communication steps or operations of the method, but the steps or operations are merely examples, and the embodiment of the present invention may also Other operations or variations of the various operations in FIG. 2 or FIG. 3 are performed. Moreover, the various steps in FIGS. 2 and 3 may be performed in a different order than that presented in FIGS. 2 and 3, respectively, and it is possible that not all operations in FIGS. 2 and 3 are to be performed.

FIG. 2 shows a schematic flow chart of a communication method according to an embodiment of the present invention, which is described from the perspective of device interaction. The method can be used in a communication system for communicating over a wireless air interface, which communication system can include at least one network device and at least one terminal device. For example, the communication system can be the wireless communication system 100 shown in FIG.

As shown in FIG. 2, the method includes the following steps:

S210. The network device determines a first timing advance of the terminal device on the first carrier unit.

Optionally, in the random access process, the network device may determine the first timing advance by measuring the received preamble sequence.

Optionally, in an RRC connected state or other state in which the MAC CE can be detected, the network device may determine the first timing advance amount based on measuring an uplink transmission of the terminal device. The uplink transmission includes an uplink sounding reference signal (SRS), an uplink demodulation reference signal (DM-RS), a physical uplink shared data channel (PUSCH), or a physical uplink control channel. (Physical Uplink Control Channel, PUCCH), etc., which are not limited in this embodiment of the present application.

Optionally, the first carrier unit belongs to one of all carrier units included in the first timing advance group, and the timing advance amount on the all carrier units is the first timing advance amount.

In a scenario of carrier aggregation or multiple connections, the network device sets the carrier units having the same timing advance amount to be in a “Timing advance group” by estimating the relationship between timing advance amounts of different carrier units in advance. TAG). The estimation method may be that the network device communicates according to different propagation paths of different carrier units (for example, the network device and the terminal device on the carrier unit communicate with each other through a line of sight (LoS), and some carriers are used. The network device and the terminal device on the unit are performed by one relay, and the propagation delay between the network device and the terminal device is different, or the carrier frequency spacing between the aggregated carrier units is calculated, which is not limited in this application.

Optionally, the network device can configure multiple TAGs for the terminal device by using high layer signaling. For example, when the network device indicates that the terminal device adds a secondary cell (Scell) through the high layer signaling, a TAG identifier is added to the Scell. If a TAG contains a primary cell (Pcell), the TAG can be called a primary TAG (pTAG); if the primary cell is not included, the TAG is called a secondary TAG (sTAG). . Both pTAG and sTAG can contain one or more Scells. The terminal device considers that the carrier unit in one TAG has the same uplink timing advance and the same downlink timing reference cell. It should be understood that the uplink subframe timing offset may be referred to as a timing advance.

It should be noted that, in the present application, the timing advance amount of the first carrier unit is equivalent to the timing advance amount corresponding to the first timing advance group. The present application does not distinguish between a timing advance amount (for example, a first carrier unit) corresponding to a carrier unit and a timing advance amount (for example, a first timing advance group) corresponding to a TAG to which the carrier unit belongs.

S220. The network device sends a first message to the terminal device. Accordingly, the terminal device receives the first message.

Specifically, the first message includes a first timing advance amount. The timing adjustment unit of the first timing advance is related to the first carrier unit. The timing adjustment unit may also be referred to as the granularity of uplink synchronization. Hereinafter, for convenience of description and distinction, the timing adjustment unit of the first timing advance amount is referred to as the first timing adjustment unit.

Optionally, the first timing adjustment unit is related to the first sampling clock, that is, the first sampling clock is determined according to the first sampling clock. The first sampling clock is one of sampling clocks of all carrier units included in the first TAG.

Specifically, the first timing adjustment unit is related to a first sampling clock T _s,c of sampling clocks of all carrier units included in the first TAG, for example, the first timing adjustment unit is N*T _s,c . The N is predefined by the system or configured by high layer signaling or physical layer signaling, and N is a positive integer.

The first sampling clock T _s,c may be, for example, a minimum sampling clock of sampling clocks corresponding to all carrier units in the first TAG. The minimum sampling clock is related to the maximum carrier bandwidth of all carrier units in the first TAG, for example, the minimum sampling clock is inversely proportional to the maximum carrier bandwidth. The first sampling clock T _s,c , as another example, may be a maximum sampling clock that can be divisible by a sampling clock corresponding to all carriers in the first TAG.

Optionally, the first timing adjustment unit is related to the second sampling clock, wherein the second sampling clock is a system-defined minimum sampling clock.

Specifically, the timing adjustment unit corresponding to the first carrier unit is N ₁ *T _s , and N ₁ is a positive integer. For example, TAG _i is a high frequency, and the corresponding timing adjustment unit is N _i *T _s , and TAG _i+1 is a low frequency, and the corresponding timing adjustment unit is N _i+1 *T _s , and the N _i and N _i+1 are positive integers. And N _{i is} not greater than N _i+1 . Alternatively, the N ₁ defined by the system or by higher layer signaling or physical layer signaling configuration.

Optionally, the first timing adjustment unit is related to the first carrier frequency point, where the first carrier frequency point is one of all carrier frequency points corresponding to the all carrier units, where the carrier frequency point One-to-one correspondence with the carrier unit.

Specifically, the frequency point fc in the set of carrier frequency points corresponding to all the carrier units included in the first TAG of the first carrier unit may be determined according to the relationship between the predefined carrier frequency point and the timing adjustment unit. The first timing adjustment unit corresponding to the carrier unit.

For example, the frequency point fc may be a minimum frequency point or a maximum frequency point or a frequency point average value in a set of carrier frequency points corresponding to the set of carrier units included in the first TAG, or a frequency point corresponding to the primary serving cell. Or the first access secondary service cell, which is not specifically limited in this application.

The relationship between the carrier frequency point fc and the accuracy of the first timing advance may be predefined by the system or configured by higher layer signaling or physical layer signaling.

It should be understood that, in this application, the carrier unit and the carrier correspond to the same physical meaning, and may be interchanged. This application does not distinguish. It should be understood that the carrier refers to a frequency domain resource used for air interface transmission, and the frequency domain resource may be predefined by the system or configured by the network. The frequency domain resources may be continuous or discontinuous, and the application does not limit the application.

Optionally, the first timing adjustment unit is determined according to a first subcarrier interval and a second subcarrier interval in a subcarrier interval indicated by a plurality of different parameter sets in the first carrier unit.

For example, the first subcarrier spacing may be the largest subcarrier spacing of the subcarrier spacing indicated by a plurality of different parameter sets. The second subcarrier spacing may be any one of the subcarrier spacings indicated by the plurality of different parameter sets. The N times of the reciprocal of the maximum subcarrier spacing is used as the first timing adjustment unit, and the N is predefined by the system or configured by high layer signaling or physical layer signaling.

It should be understood that the parameter set is defined as a set of parameters including at least one of the following: subcarrier spacing, symbol length, CP length, bandwidth, number of symbols per time unit, and the like.

Optionally, the first message may be a random access response message, or may be a Timing Advance Command (TAC) message, or may be other messages, which is not limited in this application.

Optionally, an indication of the first timing advance amount may be performed by using a timing advance control field in the first message.

Further, if the network device determines the first timing advance by measuring the received preamble sequence in the random access procedure, the network device may send the first timing to the terminal device by using the timing advance control field in the random access response. Advance quantity.

Further, if the network device determines the timing advance of each terminal device based on the uplink transmission of the measurement corresponding terminal device when the RRC connection state or other state in which the MAC CE can be detected, the network device may pass the timing in the MAC CE. The advance control command sends a first timing advance to the terminal device, and requires it to adjust the uplink transmission timing, that is, adjust the transmission time of the uplink signal on the first carrier unit.

S230. The terminal device determines the first timing advance adjustment amount according to the first timing advance amount and the first timing adjustment unit.

Specifically, according to the first timing adjustment unit, the terminal may determine the first timing advance adjustment amount.

For example, the terminal can calculate the first timing advance according to the following formula:

N _TA,new1 =N _TA,old1 +(T _A -A1)×B1

A1 may be configured by a system pre-defined or high-level signaling, B1 is the first timing adjustment unit, N _{TA, new1} is a first timing advance adjustment amount, and N _{TA, old1} is a previous timing advance adjustment amount. , T _A is the first timing advance amount.

For another example, the terminal may calculate, according to the following formula, the number of first timing sampling points corresponding to the first timing advance of any carrier C in the TAG to which the first carrier belongs:

N _{TA, new2} = N _{TA, old2} + (T _{A -} A2) × B2

A2 may be configured by a system pre-defined or high-level signaling, and B2 is the first timing adjustment unit divided by the sampling clock corresponding to the carrier C, and N _{TA, new1} are the first timing advance adjustment corresponding to the first The number of sampling points at a certain time, N _{TA, ol1d} is the number of first timing sampling points corresponding to the previous timing advance adjustment amount.

Optionally, the method may further include:

S240. The terminal device determines an effective time of the first timing advance adjustment amount.

Specifically, since the time units corresponding to different numerologies may be different, the timing of the Timing Advance Command (TAC) command (for example, the first message) should be consistent for different numerologies belonging to the same carrier unit. understanding. In LTE, if the terminal device receives the TAC in the subframe n, the terminal device applies the timing advance adjustment amount from the subframe n+6. If the PUCCH/PUSCH/SRS transmitted by the terminal device in the subframe n and the subframe n+1 overlap due to the timing advance adjustment amount, the terminal device will completely transmit the content of the subframe n without transmitting the subframe n+1. Overlapping parts. In different numerologies, the number of subframes may be inconsistent. Therefore, it is necessary to redefine the effective time of the TAC to ensure that the TA adjustment effective time calculated by different numerologies is consistent.

In the embodiment of the present application, optionally, the terminal device may determine the effective time, that is, the TA adjustment effective time, according to the system basic time unit of the first timing advance adjustment amount. The system base time unit is configured by the system preset or the network side.

The system base time unit may be, for example, 1 millisecond, or a certain time unit, for example, a certain time unit of a certain numerology may be a subframe, a time slot, or the like. It should be understood that the subframe, the time slot may be a subframe defined in an existing protocol, a time slot, or a subframe, a time slot in the NR, or may be a subframe or a time slot defined in other communication systems in the future. This embodiment of the present application does not limit this.

Optionally, the system base time unit is determined according to a first parameter set of the plurality of parameter sets corresponding to the first carrier unit.

Optionally, the first carrier unit belongs to a first timing advance group, and a timing advance amount on all carrier units included in the first timing advance group is the first timing advance amount;

The determining, by the terminal device, the effective time of the timing advance adjustment amount, the determining, by the terminal device, determining the effective time according to the second parameter set of the plurality of parameter sets included in the first timing advance group.

One of the plurality of numerologies in the first TAG is used as the reference time unit. For example, if the subframe with the longest subframe length or the subframe with the shortest subframe length is selected, other numerology needs to be inversely calculated according to the relationship with the reference time unit. , infer the effective time position of the adjustment.

It should be understood that different numerologies correspond to different n+k, n values are related to numerology, and k values are related to numerology;

In addition, considering the multi-antenna panel scenario of the terminal device, the data streams sent by the antenna panels may be directed to different network devices through different beam directions, and the beam or antenna port set sent to different network devices may need different timing advances, or The same beam can be sent to different network devices at different times, corresponding to different timing advances.

In the embodiment of the present application, the timing advance amount on the first carrier may include at least one, and the timing advance amount corresponds to the terminal device. The timing advance corresponding to different beams may be different. Different beams can be understood as different terminal devices, that is, a terminal device can be understood as a beam or a group of beams or a group of beams. Therefore, independent timing processes can be configured for each beam or group of beams.

Optionally, in the embodiment of the present application, the first timing advance amount is a timing advance amount of the first timing process. The first timing process is one of a plurality of timing processes corresponding to the first carrier unit, and the plurality of timing advances corresponding to the multiple timing processes are multiple timing advances corresponding to the multiple sets of uplink transmission resources. The plurality of timing processes are in one-to-one correspondence with the plurality of timing advances, and the plurality of sets of uplink transmission resources are in one-to-one correspondence with the plurality of timing advance amounts.

Specifically, the first carrier unit corresponds to multiple timing processes, and each timing process corresponds to one timing advance quantity, and each timing advance quantity corresponds to a group of uplink transmission resources. In this case, in addition to determining the first timing advance on the first carrier unit, the network device also needs to determine the timing advance corresponding to the other processes, and transmits the determined timing advance, so that the different transmissions can be performed. The uplink signal sent on the resource is adjusted periodically.

In the embodiment of the present application, optionally, the multiple timing processes are distinguished by a unique process identification ID. The process identifier ID, for example, the ID corresponding to the uplink transmission resource is the same ID.

Optionally, the first message may include a timing process ID and a corresponding timing advance. That is to say, in addition to sending the timing advance, the network device needs to send the process ID corresponding thereto. In this way, the terminal device can determine the timing advance corresponding thereto according to the ID.

Optionally, as a preset rule, a timing process corresponds to a group of sounding resource signal (SRS) resources, and when the SRS resource is configured, the corresponding timing process is implicitly determined. Optionally, the ID of the SRS resource may be used as the ID of the timed process.

Optionally, before the sending the first message, the network device may configure, by the network device, the multiple timing process information in the first carrier unit, where the timing process information includes a relationship between the timing process and the uplink transmission resource. information. The message for configuring multiple timing process information may be high layer signaling or physical layer signaling.

Optionally, the network device can directly configure, by using the configuration message, multiple timing processes and a process ID corresponding to each process.

Optionally, the configuration message includes an initial value of a timing advance corresponding to each timing process.

Optionally, the configuration message may be a message that the network device configures a beam or a beam group for the terminal device, and when the network device configures the beam or the beam group for the terminal device, the TA process and the device are configured independently or by joint coding. Corresponding timing process ID. The beam or beam group corresponds to the timing process one-to-one.

Optionally, the beam ID/beam group ID or the like may be used as the ID of the timing process, that is, by indicating the transmission beam information, the corresponding timing process is indicated accordingly.

Optionally, when the terminal device performs initial access, the timing process and the timing process ID may be configured by using a random access response.

For example, the configuration message may be a message when the network device configures the SRS resource for the terminal device, and when the network device configures the SRS resource for the terminal device, configures the TA process and its corresponding timing process independently or through joint coding. ID,

Optionally, the ID corresponding to the SRS resource is used as the corresponding timing process ID, so that the timing adjustment of different processes in the connected state can be obtained by sending different SRSs.

In addition, the initial timing value corresponding to the timing process can be configured to calculate the timing adjustment amount of the corresponding timing process. Optionally, the timing adjustment command carried in the random access response message may be used as an initial timing value.

Optionally, for different network devices, or different beam groups, the terminal device may obtain the process ID and the corresponding initial timing value through separate random access procedures.

Optionally, when performing beam switching, the network device may simultaneously indicate, by using a beam switching message (RRC or MAC CE or DCI, etc.), that the terminal device performs uplink transmission by using a timing advance indicated by the corresponding timing process.

Optionally, the process ID assignment may be performed according to a preset rule, for example, the IDs are allocated in order according to the order of the configuration process.

Optionally, the first message includes a timing advance indicating that a plurality of timing processes in the same carrier unit are sequentially corresponding to the plurality of independently configured timing processes, and indicating a timing advance amount that the corresponding timing process needs to be adjusted. .

FIG. 3 shows a schematic flow chart of a communication method according to another embodiment of the present application, which is described from the perspective of device interaction. The method can be used in a communication system for communicating over a wireless air interface, which can include at least two network devices and at least one terminal device.

S310. The network device determines a timing advance of at least one timing process in the same carrier unit, where the at least one timing process corresponds to at least one group of resources of the multiple sets of uplink transmission resources.

S320. The network device sends a second message to the terminal device, where the second message includes a timing advance of the at least one process. The second message includes at least one timing advance amount in the same carrier unit, the at least one timing advance amount is in one-to-one correspondence with at least one timing progress, and the at least one timing advance amount is in one-to-one correspondence with at least one group of uplink transmission resources. .

S330. The terminal device determines, according to the first timing advance amount of the at least one timing advance amount, a first timing advance adjustment amount, where the first timing advance amount and a first timing process in the at least one timing process correspond.

Optionally, the configuration information is a random access response message.

Optionally, in a possible implementation manner, the method further includes:

It should be understood that the embodiments described above in connection with the timing process are equally applicable in this application.

FIG. 4 is a schematic block diagram of a network device according to an embodiment of the present application. As shown in FIG. 4, the network device 400 includes a processing unit 410 and a transmitting unit 420.

The processing unit 410 is configured to determine a first timing advance amount of the terminal device on the first carrier unit;

The sending unit 420 is configured to send, to the terminal device, a first message, where the first message includes the first timing advance amount, where a timing adjustment unit of the first timing advance amount is related to the first carrier unit related.

It should be understood that each unit in the network device 400 can be used to perform various actions or processes of the network device in the foregoing method embodiments. Here, in order to avoid redundancy, a detailed description thereof will be omitted.

FIG. 5 is a schematic block diagram of a terminal device according to an embodiment of the present application. As shown in FIG. 5, the terminal device 500 includes a processing unit 510 and a transmitting unit 520.

The processing unit 510 is configured to determine a first timing advance amount of the terminal device on the first carrier unit;

The sending unit 520 is configured to send, to the terminal device, a first message, where the first message includes the first timing advance amount, where a timing adjustment unit of the first timing advance amount is related to the first carrier unit related.

It should be understood that each unit in the terminal device 500 can be used to perform each action or process of the terminal device in each of the foregoing method embodiments. Here, in order to avoid redundancy, a detailed description thereof will be omitted.

FIG. 6 shows a schematic structural diagram of a network device 600 according to an embodiment of the present application. As shown in FIG. 6, the network device 600 includes a transceiver 610, a processor 620, and a memory 630. The transceiver 610, the processor 620, and the memory 630 communicate with each other through an internal connection path to transfer control and/or data signals. It should be understood that the processor 620 may correspond to the processing unit 410 in the network device illustrated in FIG. 4, and the transceiver 610 may correspond to the transmitting unit 420.

It should also be understood that when the processor 620 calls and runs the computer program from memory, the processor 620 can be used to perform the above methods and implement the functions of the method, such as the functionality of the network device.

FIG. 7 shows a schematic structural diagram of a terminal device 700 according to an embodiment of the present application. As shown in FIG. 7, the terminal device 700 includes a transceiver 710, a processor 720, and a memory 730. The transceiver 710, the processor 720 and the memory 730 communicate with each other through an internal connection path to transfer control and/or data signals. It should be understood that the processor 720 may correspond to the processing unit 510 in the terminal device shown in FIG. 5, and the transceiver 710 may correspond to the transmitting unit 520.

It should also be understood that when the processor 720 calls and runs the computer program from memory, the processor 720 can be used to perform the above methods and implement the functions of the method, such as the functionality of the terminal device.

The embodiments of the present application may be applied to a processor or implemented by a processor. The processor can be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the foregoing method embodiment may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software. The processor may be a central processing unit (CPU), the processor may be another general-purpose processor, a digital signal processor (DSP), or an application specific integrated circuit (ASIC). ), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software in the decoding processor. The software can be located in a random storage medium, such as a flash memory, a read only memory, a programmable read only memory or an electrically erasable programmable memory, a register, and the like. The storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the above method.

It should also be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory may be a read-only memory (ROM), a programmable read only memory (ROMM), an erasable programmable read only memory (erasable PROM, EPROM), or an electrical Erase programmable EPROM (EEPROM) or flash memory. The volatile memory can be a random access memory (RAM) that acts as an external cache. By way of example and 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 (Synchronous DRAM). SDRAM), double data rate synchronous DRAM (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronously connected dynamic random access memory (synchlink DRAM, SLDRAM) ) and direct memory bus random access memory (DRRAM). It should be noted that the memories of the systems and methods described herein are intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that the term "and/or" herein is merely an association relationship describing an associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, and A and B exist simultaneously. There are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

It should be understood that, in the various embodiments of the present application, the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the order of execution of each process should be determined by its function and internal logic, and should not be applied to the embodiment of the present application. The implementation process constitutes any limitation.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

The functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the technical solution of the present application, which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program code. .

The foregoing is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application. It should be covered by the scope of protection of this application. Therefore, the scope of protection of the present application should be determined by the scope of the claims.

Claims

A communication method, comprising:

The network device determines a first timing advance amount of the terminal device on the first carrier unit;

The network device sends a first message to the terminal device, where the first message includes the first timing advance amount, wherein a timing adjustment unit of the first timing advance amount is related to the first carrier unit.
The method according to claim 1, wherein said first carrier unit belongs to one of all carrier units included in said first timing advance group, and said timing advance on said all carrier units is said The first timing advance.
The method of claim 2, wherein the timing adjustment unit is determined according to a first sampling clock, the first sampling clock being one of sampling clocks of the all carrier units.
The method of claim 2 wherein said timing adjustment unit is determined based on a second sampling clock, wherein said second sampling clock is a system-defined minimum sampling clock.
The method according to claim 2, wherein the timing adjustment unit is determined according to a first carrier frequency point, wherein the first carrier frequency point is among all carrier frequency points corresponding to the all carrier units In one of the above, the carrier frequency points are in one-to-one correspondence with the carrier unit.
The method according to any one of claims 1 to 5, wherein the first timing advance is a timing advance of a first timing process, and the first timing process is the first carrier unit One of the plurality of timing processes, the plurality of timing advances corresponding to the plurality of timing processes being a plurality of timing advances corresponding to the plurality of sets of uplink transmission resources, wherein the plurality of timing processes and The plurality of timing advance amounts are in one-to-one correspondence, and the plurality of sets of uplink transmission resources are in one-to-one correspondence with the plurality of timing advance amounts.
The method according to claim 6, wherein the uplink transmission resource is any one of the following:

The set of antenna ports for uplink transmission, the beam for uplink transmission, the beam group for uplink transmission, and the uplink sounding reference signal SRS resources.
A communication method, comprising:

Receiving, by the terminal device, the first message sent by the network device, where the first message includes a first timing advance amount of the terminal device on the first carrier unit;

The terminal device determines a first timing advance adjustment amount according to the timing adjustment unit of the first timing advance amount and the first timing advance amount, where the first timing advance adjustment amount is used to adjust the first carrier unit The transmission time of the upstream signal.
The method according to claim 8, wherein said first carrier unit belongs to one of all carrier units included in said first timing advance group, and said timing advance on said all carrier units is said The first timing advance.
The method of claim 9, wherein the timing adjustment unit is determined according to a first sampling clock, the first sampling clock being one of sampling clocks of the all carrier units.
The method according to claim 10, wherein said first sampling clock is a minimum sampling clock of sampling clocks corresponding to said all carrier units, said minimum sampling clock being based on said all carrier units The maximum carrier bandwidth is determined, or the first sampling clock is a maximum sampling clock that can be divisible by a sampling clock corresponding to all the carriers.
The method of claim 9 wherein said timing adjustment unit is determined based on a second sampling clock, wherein said second sampling clock is a system-defined minimum sampling clock.
The method according to claim 9, wherein the timing adjustment unit is determined according to a first carrier frequency point, wherein the first carrier frequency point is among all carrier frequency points corresponding to the all carrier units In one of the above, the carrier frequency points are in one-to-one correspondence with the carrier unit.
The method according to any one of claims 8 to 13, wherein the method further comprises:

The terminal device determines an effective time of the first timing advance adjustment amount.
The method according to claim 14, wherein the first carrier unit belongs to a first timing advance group, and timing advance amounts on all carrier units included in the first timing advance group are the first timing Advance quantity

Determining, by the terminal device, an effective time of the timing advance adjustment amount, including:

The terminal device determines the effective time according to the first parameter set of the plurality of parameter sets included in the first timing advance group.
The method according to any one of claims 8 to 15, wherein the first timing advance is a timing advance of a first timing process, and the first timing process is the first carrier unit One of the plurality of timing processes, the timing advance corresponding to the first timing process is a timing advance corresponding to a group of the plurality of uplink transmission resources.
The method according to claim 16, wherein the uplink transmission resource is any one of the following:

The set of antenna ports for uplink transmission, the beam for uplink transmission, the beam group for uplink transmission, and the uplink sounding reference signal SRS resources.
A network device, comprising:

a processing unit, configured to determine a first timing advance amount of the terminal device on the first carrier unit;

a sending unit, configured to send a first message to the terminal device, where the first message includes the first timing advance amount, where a timing adjustment unit of the first timing advance amount is related to the first carrier unit .
The network device according to claim 18, wherein the first carrier unit belongs to one of all carrier units included in the first timing advance group, and the timing advance amount on the all carrier units is The first timing advance is described.
The network device according to claim 19, wherein said timing adjustment unit is determined according to a first sampling clock, and said first sampling clock is one of sampling clocks of said all carrier units.
The network device according to claim 19, wherein the timing adjustment unit is determined according to a second sampling clock, wherein the second sampling clock is a system-defined minimum sampling clock.
The network device according to claim 19, wherein the timing adjustment unit is determined according to a first carrier frequency point, wherein the first carrier frequency point is all carrier frequency points corresponding to the all carrier units One of the carriers, wherein the carrier frequency points are in one-to-one correspondence with the carrier unit.
The network device according to any one of claims 18 to 22, wherein the first timing advance is a timing advance of a first timing process, and the first timing process is the first carrier unit One of the plurality of timing processes, the plurality of timing advances corresponding to the plurality of timing processes being a plurality of timing advances corresponding to the plurality of sets of uplink transmission resources, wherein the plurality of timing processes One-to-one correspondence with the plurality of timing advances, the plurality of sets of uplink transmission resources are in one-to-one correspondence with the plurality of timing advance amounts.
The network device according to claim 23, wherein the uplink transmission resource is any one of the following:

The set of antenna ports for uplink transmission, the beam for uplink transmission, the beam group for uplink transmission, and the uplink sounding reference signal SRS resources.
A terminal device, comprising:

a receiving unit, configured to receive a first message sent by the network device, where the first message includes a first timing advance amount of the terminal device on the first carrier unit;

a processing unit, configured to determine a first timing advance adjustment amount according to the first timing advance amount and a timing adjustment unit of the first timing advance amount, where the first timing advance adjustment amount is used to adjust the first carrier The transmission time of the uplink signal on the unit.
The terminal device according to claim 25, wherein the first carrier unit belongs to one of all carrier units included in the first timing advance group, and the timing advance amount on the all carrier units is The first timing advance is described.
The terminal device according to claim 26, wherein said timing adjustment unit is determined according to a first sampling clock, and said first sampling clock is one of sampling clocks of said all carrier units.
The terminal device according to claim 27, wherein the first sampling clock is a minimum sampling clock of sampling clocks corresponding to all carrier units, and the minimum sampling clock is according to all carrier units The maximum carrier bandwidth is determined, or the first sampling clock is a maximum sampling clock that can be divisible by a sampling clock corresponding to all the carriers.
The terminal device according to claim 26, wherein the timing adjustment unit is determined according to a second sampling clock, wherein the second sampling clock is a system-defined minimum sampling clock.
The terminal device according to claim 26, wherein the timing adjustment unit is determined according to a first carrier frequency point, and the first carrier frequency point is all carrier frequency points corresponding to the all carrier units One of the carriers, wherein the carrier frequency points are in one-to-one correspondence with the carrier unit.
The terminal device according to any one of claims 25 to 30, wherein the processing unit is further configured to:

Determining an effective time of the first timing advance adjustment amount.
The terminal device according to claim 31, wherein the first carrier unit belongs to a first timing advance group, and a timing advance amount on all carrier units included in the first timing advance group is the first Timing advance

The processing unit is specifically configured to:

Determining the effective time according to the first parameter set of the plurality of parameter sets included in the first timing advance group.
The terminal device according to any one of claims 25 to 32, wherein the first timing advance is a timing advance of a first timing process, and the first timing process is the first carrier unit One of the plurality of timing processes, the timing advance corresponding to the first timing process is a timing advance corresponding to a group of the plurality of uplink transmission resources.
The terminal device according to claim 33, wherein the uplink transmission resource is any one of the following:

The set of antenna ports for uplink transmission, the beam for uplink transmission, the beam group for uplink transmission, and the uplink sounding reference signal SRS resources.