CN108811075B

CN108811075B - Communication method, network equipment and terminal equipment

Info

Publication number: CN108811075B
Application number: CN201710314192.7A
Authority: CN
Inventors: 任海豹; 李元杰
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-05-05
Filing date: 2017-05-05
Publication date: 2020-09-18
Anticipated expiration: 2037-05-05
Also published as: CN108811075A; WO2018202116A1

Abstract

The application provides a communication method, network equipment and terminal equipment, which can meet the requirements of different frequency bands on TA precision, so that uplink synchronization can be performed more accurately. The method comprises the following steps: the network equipment determines a first timing advance of the terminal equipment on a first carrier unit; the network device sends a first message to the terminal device, where the first message includes the first timing advance, and a timing adjustment unit of the first timing advance is related to the first carrier unit.

Description

Communication method, network equipment and terminal equipment

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

In the prior art, in order to enable an uplink signal transmitted by a terminal device to reach a network device at a predetermined time, the terminal device needs to transmit the uplink signal in advance, where the time for the terminal device to transmit the uplink signal in advance is determined according to a Timing Advance (TA).

In the prior art, because the system bandwidth is fixed and the system sampling rate is also fixed, the TA adjustment amount can be calculated by a uniform sampling method. In a new generation radio access technology (NR) system, both high frequency (above 6 GHz) and low frequency (below 6 GHz) are supported. In high frequency, the bandwidth is large, and the sampling rate of the system is high; in low frequency, the bandwidth is small, and the sampling rate of the system is small. At this time, the related art TA scheme is not applicable. Therefore, a TA scheme suitable for use in NR systems is needed.

Disclosure of Invention

The application provides a communication method, network equipment and terminal equipment, which can meet the requirements of different frequency bands on TA precision, so that uplink synchronization can be performed more accurately.

In a first aspect, a communication method is provided, including: the network equipment determines a first timing advance of the terminal equipment on a first carrier unit; the network device sends a first message to the terminal device, where the first message includes the first timing advance, and a timing adjustment unit of the first timing advance is related to the first carrier unit.

According to the communication method, the corresponding TA adjustment amount can be determined according to the timing adjustment unit related to the carrier, the requirements of different frequency bands on TA accuracy are met, and therefore uplink synchronization can be performed more accurately.

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

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

In one possible implementation, the timing adjustment unit is determined according to a second sampling clock, wherein the second sampling clock is a minimum sampling clock defined by a system.

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 all carrier units, and the carrier frequency points correspond to the carrier units one to one.

In a possible implementation manner, the first timing advance is a timing advance of a 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 plurality of timing processes are a plurality of timing advances corresponding to a plurality of sets of uplink transmission resources, where the plurality of timing processes correspond to the plurality of timing advances one to one, and the plurality of sets of uplink transmission resources correspond to the plurality of timing advances one to one.

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

the method comprises the steps of an antenna port set of uplink transmission, a beam of the uplink transmission, a beam group of the uplink transmission and an SRS resource of an uplink sounding reference signal.

In a second aspect, a communication method is provided, including: the method comprises the steps that terminal equipment receives a first message sent by network equipment, wherein the first message comprises a first timing advance of the terminal equipment on a first carrier unit; and the terminal equipment determines a first timing advance adjustment amount according to the first timing advance and a timing adjustment unit of the first timing advance, wherein the first timing advance adjustment amount is used for adjusting the sending time of the uplink signal on the first carrier unit.

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 requirements of different frequency bands for TA accuracy can be satisfied, so that uplink synchronization can be performed more accurately.

In a possible implementation manner, the first sampling clock is a minimum sampling clock of the sampling clocks corresponding to all the carrier units, where 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 evenly divided by the sampling clocks corresponding to all the carriers.

In one possible implementation, the method further includes:

and the terminal equipment determines the 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 timing advances on all carrier units included in the first timing advance group are the first timing advance;

the determining, by the terminal device, the effective time of the timing advance adjustment amount includes:

and the terminal equipment determines the effective time according to a first parameter set in a plurality of parameter sets included in the first timing advance group.

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

In a third aspect, a communication method is provided, including: the network equipment determines the timing advance of at least one timing process in the same carrier unit, wherein the at least one timing process corresponds to at least one group of resources of a plurality of groups of uplink transmission resources; and the network equipment sends a second message to the terminal equipment, wherein the second message comprises the timing advance of the at least one process.

The TA scheme in the prior art is only for one network device, and cannot support dynamic switching of the network device for uplink reception on the premise of different timings of different network devices. In the communication method of the embodiment of the application, by introducing a plurality of TA processes, each TA process corresponds to one network device, and by dynamically indicating the timing advance of different processes, it can be ensured that the receiving network device is dynamically switched to receive the uplink transmission signal of the terminal device.

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

In a possible implementation manner, the second message further includes at least one piece of first indication information, the at least one piece of first indication information corresponds to the timing advance of the at least one timing process one to one, the first indication information is used to determine the timing process of the timing advance corresponding to the first indication information, and the at least one piece of first indication information is different from each other.

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 manner, before the network device sends the second message to the terminal device, the method further includes:

and the network equipment sends configuration information to the terminal equipment, wherein the configuration information is used for indicating the corresponding relation 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 may be used to instruct the terminal device to perform uplink transmission by using a timing process and a timing advance corresponding to the switched uplink transmission resource.

Optionally, the plurality of timing processes in the first carrier unit may correspond to the plurality of uplink transmission resources one to one through a preset rule.

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

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

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

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

In a fourth aspect, a communication method is provided, including: a second message sent by a terminal equipment network device, wherein the second message includes at least one timing advance in the same carrier unit, the at least one timing advance is in one-to-one correspondence with at least one timing process, and the at least one timing advance is in one-to-one correspondence with at least one group of uplink transmission resources;

and the terminal equipment determines a first timing advance adjustment amount according to a first timing advance in the at least one timing advance, wherein the first timing advance corresponds to a first timing process in the at least one timing process.

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

and the terminal equipment receives configuration information sent by the network equipment, wherein the configuration information is used for indicating 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:

the terminal equipment receives a beam switching message sent by the network equipment;

and the terminal equipment determines a second timing advance in the at least one timing advance according to the beam switching message, and determines a second timing advance adjustment amount according to the second timing advance, wherein the second timing advance corresponds to a second timing process in the at least one timing process.

In a fifth aspect, a network device is provided for performing the method of the first aspect or any possible implementation manner of the first 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 means for performing the method of the third aspect or any possible implementation of the third aspect.

A sixth aspect provides a terminal device configured to perform the method of the second aspect or any possible implementation manner of the second aspect. In particular, the terminal device comprises means for performing the method of the second aspect or any possible implementation of the second aspect, or the terminal device comprises means for performing the method of the fourth aspect or any possible implementation of the fourth aspect.

In a seventh aspect, a network device is provided, where the network device includes a memory and a processor, where the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the sending end performs the method in the first aspect and any possible implementation manner of the first aspect, or performs the method in the third aspect or any possible implementation manner of the third aspect.

In an eighth aspect, a terminal device is provided, where the terminal device includes a memory and a processor, the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the receiving end executes the method in the second aspect and any possible implementation manner of the second aspect, and the method in the fourth aspect or any possible implementation manner of the fourth aspect.

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

A tenth aspect provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the above aspects and the method of any possible implementation of the above aspects.

In an eleventh aspect, the present application provides a chip system comprising a processor for enabling a data transmission apparatus to implement the functions referred to in the above aspects, e.g. to generate or process data and/or information referred to in the above methods. In one possible design, the system-on-chip further includes a memory for storing program instructions and data necessary for the data transmission device. The chip system may be constituted by a chip, or may include a chip and other discrete devices.

In a twelfth aspect, the present application provides a chip system comprising a processor for enabling a data receiving device to implement the functions referred to in the above aspects, e.g. to receive or process data and/or information referred to in the above methods. In one possible design, the system-on-chip further includes a memory for storing program instructions and data necessary for the data receiving device. The chip system may be constituted by a chip, or may include a chip and other discrete devices.

Drawings

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

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

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

Fig. 4 is a schematic block diagram of a network device according to the present application.

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

Fig. 6 is a schematic block diagram of another network device according to the present application.

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

Detailed Description

The technical solution 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 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 Long Term Evolution (LTE) system, an advanced long term evolution (LTE-a) system, a Universal Mobile Telecommunications System (UMTS), a 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, a base station (NodeB) in a WCDMA system, an evolved Node B (eNB or eNodeB) in an LTE system, or a Transmission Reception Point (TRP) in an NR system, which is not particularly limited in this embodiment of the present application.

In addition, the network device according to the embodiment of the present application may be a network device adopting a CU-DU architecture. The network device executing the method of the embodiment of the present application may be a central Control Unit (CU) or a Distributed Unit (DU), where the CU may also be referred to as a central unit or a control node (control unit).

In this application, a terminal device may be referred to as an access terminal, User Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or user equipment. An access terminal may be a cellular telephone, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a 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 may 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 shown in fig. 1. Network device 110 may communicate with terminal device 120 and terminal device 130 over a wireless air interface. In order to ensure that the Uplink signals sent by the terminal device 120 and the terminal device 130 reach the network device 110 at a predetermined time, an Uplink Timing Advance (Uplink Timing Advance) mechanism needs to be adopted for Uplink synchronization. In this way, the network device can control the arrival time of the uplink signal from different terminal devices at the network device by appropriately controlling the offset of each terminal device. For the terminal equipment far away from the network equipment, due to the larger transmission delay, the terminal equipment near the network equipment is required to transmit the uplink data in advance.

In the prior art, because the system bandwidth is fixed and the system sampling rate is also fixed, the TA adjustment amount can be calculated by a uniform sampling method. In a new generation radio access technology (NR) system, both high frequency (above 6 GHz) and low frequency (below 6 GHz) are supported. In high frequency, the bandwidth is large, and the sampling rate of the system is high; in low frequency, the bandwidth is small, and the sampling rate of the system is small. At this time, the related art TA scheme is not applicable. Therefore, a TA scheme suitable for use in NR systems is needed. Therefore, 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 only an example, and the communication system to which the present application is applied is not limited thereto, and for example, the number of network devices and terminal devices included in the communication system may also be other numbers.

Furthermore, in the existing wireless communication system, such as the LTE system, a terminal device has only one, two or at most 4 Antenna ports (Antenna ports), while in NR, a terminal device may have multiple Antenna panels, different Antenna panels may form different beams at the same time, and the existing protocol contents do not relate to the timing advance on the receiving side for different Antenna ports/beam transmission signals on the same terminal device. To this end, the present application provides another method of communication.

To facilitate an understanding of the present application, concepts that may be related to the present application are described in detail below.

A beam, which may be understood as a spatial resource, may refer to a transmission or reception precoding vector having an energy transmission directivity, and the transmission or reception precoding vector can be identified by index information. The energy transmission directivity may refer to that in a certain spatial position, a signal subjected to precoding processing by the precoding vector has a better receiving power, such as meeting a receiving demodulation signal-to-noise ratio, and the like, and the energy transmission directivity may also refer to that the same signal sent from different spatial positions is received by the precoding vector and has different receiving powers. Different precoding vectors may be provided for the same device (e.g., a network device or a terminal device), and different devices may also have different precoding vectors, that is, different beams correspond to each other. The beam information may be identified by index information, where the index information may be an Identifier (ID) of a resource configured for the terminal device, such as an ID or a resource of a CSI-RS configured correspondingly, or an ID or a resource of an uplink Sounding Reference Signal (SRS) configured correspondingly, or index information displayed or implicitly carried by a Signal or a channel carried by the beam, including but not limited to index information indicating the beam by sending a synchronization Signal or a broadcast channel or an uplink random access channel through the beam.

In this embodiment of the present application, the high-level signaling may be Radio Resource Control (RRC) signaling or a wireless Media Access Control element (MAC CE), and this 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 fig. 2 and 3.

It should be understood that fig. 2 and 3 are schematic flow charts of the communication method of the embodiment of the present invention, showing detailed communication steps or operations of the method, but these steps or operations are only examples, and the embodiment of the present invention may also perform other operations or variations of the various operations in fig. 2 or 3. Moreover, the various steps in fig. 2 and 3 may be performed in a different order than presented in fig. 2 and 3, respectively, and it is possible that not all of the operations in fig. 2 and 3 are performed.

Fig. 2 shows a schematic flow chart of a communication method according to an embodiment of the invention, described from the point of view of device interaction. The method may be used in a communication system that communicates over a wireless air interface, and the communication system may include at least one network device and at least one terminal device. The communication system may be, for example, the wireless communication system 100 shown in fig. 1.

As shown in fig. 2, the method comprises the steps of:

s210, the network equipment determines a first timing advance of the terminal equipment on a 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, when the RRC is in the RRC connected state or otherwise may detect the state of the MAC CE, the network device may determine the first timing advance based on measuring 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 Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH), and the like, which is not limited in this embodiment of the present invention.

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

In a carrier aggregation or multi-connection scenario, a network device sets carrier units with the same timing advance to be within one "timing advance group" (TAG) by estimating a relationship between timing advances of different carrier units in advance. The estimation method may be that the network device performs calculation according to propagation paths of different carrier units known in advance (for example, some carrier units perform communication with the terminal device through a Line of Sight (LoS), some carrier units perform communication with the terminal device through a relay, propagation delays between the network device and the terminal device are naturally different), or carrier frequency intervals between aggregated carrier units, and the like, and the present application is not limited thereto.

Optionally, the network device may configure a plurality of TAGs for the terminal device through high-layer signaling. For example, when the network device indicates, through a high-level signaling, that the terminal device adds one Secondary cell (Scell) each time, a TAG is added to the Scell at the same time. A TAG may be referred to as a Primary TAG (pTAG) if it contains a Primary cell (Pcell); if no Primary cell is included, this TAG is called a Secondary TAG (sTAG). Both pTAG and tags may comprise one or more scells. The terminal device considers that the carrier units in one TAG have the same uplink timing advance (uplink timing advance) and the same downlink timing reference cell (downlink timing reference cell). It should be understood that the uplink subframe timing offset may be referred to as a timing advance.

In the present application, the timing advance of the first carrier component is equivalent to the timing advance corresponding to the first timing advance group. The timing advance corresponding to a carrier unit (e.g., a first carrier unit) and the timing advance corresponding to a TAG to which the carrier unit belongs (e.g., a first timing advance group) are not distinguished.

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

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

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

Specifically, the first timing adjustment unit and a first sampling clock T of sampling clocks of all carrier cells included in the first TAG_s,cCorrelation, e.g. first timing adjustment unit N x T_s,c. The N is predefined by a system or configured through high-layer signaling or physical layer signaling, and is a positive integer.

The first sampling clock T_s,cFor example, it may be the minimum sampling clock among the sampling clocks corresponding to all carrier cells in the first TAG. The minimum sampling clock is related to, e.g., inversely proportional to, the maximum carrier bandwidth among all carrier elements in the first TAG. The first sampling clock T_s,cAs another example, it may be the maximum sampling clock that is divisible by the sampling clocks corresponding to all carriers in the first TAG.

Optionally, the first timing adjustment unit is related to a 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 component is N₁*T_s，N₁Is a positive integer. E.g. TAG_iFor high frequencies, the corresponding timing adjustment unit is N_i*T_s，TAG_i+1For low frequencies, the corresponding timing adjustment unit is N_i+1*T_sSaid N is_i、N_i+1Is a positive integer, and N_iNot more than N_i+1. Optionally, the N is₁Predefined for the system or configured through higher layer signaling or physical layer signaling.

Optionally, the first timing adjustment unit is related to a first carrier frequency point, where the first carrier frequency point is one of all carrier frequency points corresponding to all carrier units, and the carrier frequency points correspond to the carrier units one to one.

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

For example, the frequency point fc may be a minimum frequency point, a maximum frequency point, or a frequency point average value in a carrier frequency point set corresponding to a carrier unit set included in the first TAG, or a frequency point corresponding to a main serving cell or a first accessed auxiliary serving cell, which is not specifically limited in this application.

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

It should be understood that, in the present application, the carrier unit and the carrier correspond to the same physical meanings, which may be interchanged, and the present application does not distinguish between them.

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

For example, the first subcarrier spacing may be a largest subcarrier spacing among subcarrier spacings indicated by a plurality of different sets of parameters. The second subcarrier spacing may be any of the subcarrier spacings indicated by the plurality of different sets of parameters. And taking N times of the reciprocal of the maximum subcarrier interval as a first timing adjustment unit, wherein the N is predefined by a system or configured by high-layer signaling or physical-layer signaling.

It is to be understood that the parameter set is defined as a set of parameters comprising at least one of: subcarrier spacing, symbol length, CP length, bandwidth, number of symbols contained per time unit, etc.

Optionally, the first message may be a random access response message, a Timing Advance Command (TAC) message, or another message, which is not limited in the present invention.

Optionally, the first timing advance may be indicated in the first message through a timing advance control field.

Further, if the network device determines the first timing advance by measuring the received preamble sequence in the random access process, the network device may send the first timing advance to the terminal device through a timing advance control field in the random access response.

Further, if the network device determines the timing advance of each terminal device based on measuring uplink transmission of the corresponding terminal device in the RRC connected state or other states capable of detecting the MAC CE, the network device may send the first timing advance to the terminal device through the timing advance control command in the MAC CE, and request the terminal device to adjust uplink transmission timing, that is, adjust the transmission time of the uplink signal on the first carrier unit.

And S230, the terminal equipment determines a first timing advance adjustment amount according to the first timing advance and the first timing adjustment unit.

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

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

N_TA,new1＝N_TA,old1+(T_A-A1)×B1

wherein A1 can be predefined by system or configured by high-level signaling, B1 is the first timing adjustment unit, N_TA,new1A first timing advance adjustment amount, N_TA,old1For the last timing advance adjustment, T_AIs the first timing advance.

For another example, the terminal may calculate 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 according to the following formula:

N_TA,new2＝N_TA,old2+(T_A-A2)×B2

wherein A2 can be predefined by system or configured by high-level signaling, B2 is the first timing adjustment unit divided by the sampling clock corresponding to the carrier C, N_TA,new1A first number of timing sampling points, N, corresponding to a first timing advance adjustment amount_TA,ol1dThe number of the first timing sampling points corresponding to the previous timing advance adjustment amount.

Optionally, the method may further include:

and S240, the terminal equipment determines the effective time of the first timing advance adjustment amount.

In particular, since time units corresponding to different numerologies may be different, the effective time of one Timing Advance Command (TAC) Command (e.g., first message) should be consistently understood for different numerologies belonging to the same carrier unit. In LTE, if the terminal device receives TAC in subframe n, the terminal device will start to apply the timing advance adjustment from subframe n + 6. If the PUCCH/PUSCH/SRS transmitted by the terminal device in subframe n and subframe n +1 overlap due to the timing advance adjustment, the terminal device will fully transmit the contents of subframe n without transmitting the overlapping portion of subframe n + 1. In different numerology, the number of the subframe may not be consistent, so the effective time of the TAC needs to be redefined to ensure that the TA adjustment effective time calculated by different numerology is consistent.

In this embodiment of the 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 basic time unit is preset by the system or configured at the network side.

The system basic time unit may be, for example, 1 ms, or a certain time unit, for example, a certain time unit of a certain numerology, and the time unit may be a subframe, a slot, or the like. It should be understood that the subframe and the slot may be subframes and slots defined in an existing protocol, may also be subframes and slots in NR, or may also be subframes and slots defined in other future communication systems, which is not limited in this embodiment of the present application.

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

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

the determining, by the terminal device, the effective time of the timing advance adjustment amount includes: and the terminal equipment determines the effective time according to a second parameter set in the plurality of parameter sets included in the first timing advance group.

And taking one of the plurality of numerologies in the first TAG as a reference time unit, for example, selecting a subframe with the longest subframe length or selecting a subframe with the shortest subframe length, and performing inverse calculation on other numerologies according to the relation with the reference time unit to infer the adjusted effective time position.

It should be understood that different numerologies correspond to different n + k, with the n value being related to numerology and the k value being related to numerology;

in addition, considering a multi-antenna panel scenario of a terminal device, data streams sent by each antenna panel may point to different network devices through different beam directions, beams or antenna port sets sent to different network devices may need different timing advances, or the same beam may be sent to different network devices at different times, corresponding to different timing advances.

In the embodiment of the present application, the timing advance on the first carrier may include at least one, and the timing advance corresponds to the terminal device. The timing advance corresponding to different beams may be different. Different beams may be understood as different terminal devices, i.e. a terminal device may be understood as a beam or a group of beams. Thus, an independent timing schedule may be configured for each beam or group of beams.

Optionally, in this embodiment of the present application, the first timing advance is a timing advance 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 plurality of timing processes are a plurality of timing advances corresponding to the plurality of groups of uplink transmission resources. The plurality of timing processes correspond to the plurality of timing advances one to one, and the plurality of groups of uplink transmission resources correspond to the plurality of timing advances one to one.

Specifically, the first carrier unit corresponds to a plurality of timing processes, each timing process corresponds to a timing advance, and each timing advance corresponds to a group of uplink transmission resources. In this case, the network device needs to determine the timing advance corresponding to another process in addition to the first timing advance on the first carrier unit, and to transmit the determined timing advance, so that timing adjustment can be performed on uplink signals transmitted on different transmission resources.

In this embodiment of the present application, optionally, the plurality of timing processes are distinguished by a unique process identification ID. The process identification ID may be, for example, the same ID as the ID corresponding to the uplink transmission resource.

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

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

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

Optionally, the network device may directly configure, through the configuration message, the terminal device with a plurality of timing processes and a process ID corresponding to each process.

Optionally, the configuration message also 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 a beam or a beam group for the terminal device, the network device configures the TA process and the timing process ID corresponding to the TA process independently or in a joint coding manner. The beams or groups of beams correspond one-to-one to the timing process.

Alternatively, the beam ID/beam group ID, etc. 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 procedure and the timing procedure ID may be configured through a random access response.

For another 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, the TA process and the corresponding timing process ID thereof are configured independently or in a joint coding manner,

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

In addition, the initial timing value corresponding to the timing process can be configured while the timing process is configured, so as 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 the initial timing value.

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

Optionally, when performing beam switching, the network device may instruct, through a beam switching message (RRC, MAC CE, DCI, or the like), the terminal device to perform uplink transmission by using the timing advance indicated by the corresponding timing process.

Alternatively, the process ID allocation may be performed according to a preset rule, for example, the ID allocation may be performed in sequence according to the sequence of the configuration process.

Optionally, the first message includes a timing advance used for indicating that timing advances of multiple timing processes in the same carrier unit sequentially correspond to the multiple independently configured timing processes, and indicates a timing advance that a 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, described from the point of view of device interaction. The method can be used in a communication system that communicates over a wireless air interface, and the communication system can include at least two network devices and at least one terminal device.

S310, the network equipment determines the timing advance of at least one timing process in the same carrier unit, wherein the at least one timing process corresponds to at least one group of resources of multiple groups of uplink transmission resources.

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

S330, the terminal equipment determines a first timing advance adjustment amount according to a first timing advance in the at least one timing advance, wherein the first timing advance corresponds to a first timing process in 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:

It should be understood that many of the above-described embodiments relating to timing processes 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.

A processing unit 410, configured to determine a first timing advance of a terminal device on a first carrier unit;

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

It should be understood that the units in the network device 400 can be respectively used for executing the actions or processes of the network device in the above-described method embodiments. Here, detailed description thereof is omitted in order to avoid redundancy.

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.

A processing unit 510, configured to determine a first timing advance of a terminal device on a first carrier unit;

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

It should be understood that the units in the terminal device 500 may be respectively used for executing the actions or processes of the terminal device in the above-described method embodiments. Here, detailed description thereof is omitted in order to avoid redundancy.

Fig. 6 shows a schematic block diagram of a network device 600 according to an embodiment of the application. As shown in fig. 6, the network device 600 includes: a transceiver 610, a processor 620, and a memory 630. Wherein the transceiver 610, the processor 620 and the memory 630 communicate with each other via internal connection paths to transfer control and/or data signals.

It is also to be understood that the processor 620 may be adapted to perform the above-described method and implement the functions of an executing body of the method, such as a terminal, when the processor 620 calls and runs the computer program from the memory.

Fig. 7 shows a schematic block diagram of a terminal device 700 according to an embodiment of the present application. As shown in fig. 7, the terminal device 700 includes: transceiver 710, processor 720, and memory 730. The transceiver 710, the processor 720 and the memory 730 communicate with each other via internal connection paths to transfer control and/or data signals.

It will also be appreciated that the processor 720 may be adapted to perform the above-described methods and implement the functionality of an executing agent of the methods, such as a network device, when the processor 720 invokes and runs the computer program from the memory.

The embodiment of the application can be applied to or realized by a processor. The processor may be an integrated circuit chip having signal processing capabilities. 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 Central Processing Unit (CPU), other 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 component. 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 in the decoding processor. The software may be in ram, flash, rom, prom, or eprom, registers, among other 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 also 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 (DRRAM). It should be noted that the memory of the systems and methods described herein is 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 one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of communication, comprising:

the network equipment determines a first timing advance of the terminal equipment on a first carrier unit;

the network device sends a first message to the terminal device, where the first message includes the first timing advance, where the first carrier unit belongs to one of all carrier units included in a first timing advance group, the timing advance on all carrier units is the first timing advance, a timing adjustment unit of the first timing advance is N times of an inverse number of a maximum subcarrier interval in subcarrier intervals indicated by multiple different parameter sets numerology corresponding to all carrier units, and N is predefined by a system or configured through higher layer signaling or physical layer signaling.

2. The method of claim 1, wherein the first timing advance is a timing advance of a 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 plurality of timing processes are a plurality of timing advances corresponding to a plurality of sets of uplink transmission resources, wherein the plurality of timing processes correspond to the plurality of timing advances one to one, and the plurality of sets of uplink transmission resources correspond to the plurality of timing advances one to one.

3. The method of claim 2, wherein the uplink transmission resource is any one of:

4. A method of communication, comprising:

the method comprises the steps that terminal equipment receives a first message sent by network equipment, wherein the first message comprises a first timing advance of the terminal equipment on a first carrier unit;

the terminal device determines a first timing advance adjustment amount according to the first timing advance and a timing adjustment unit of the first timing advance, where the first timing advance adjustment amount is used to adjust the transmission time of an uplink signal on the first carrier unit, the first carrier unit belongs to one of all carrier units included in a first timing advance group, the timing advance on all carrier units is the first timing advance, the timing adjustment unit of the first timing advance is N times of a reciprocal of a maximum subcarrier interval in subcarrier intervals indicated by a plurality of different parameter sets numerologies corresponding to all carrier units, and N is predefined by a system or configured by high-level signaling or physical layer signaling.

5. The method of claim 4, wherein the method further comprises:

6. The method of claim 5, wherein the first carrier unit belongs to a first timing advance group, the first timing advance group comprising timing advances on all carrier units of the first timing advance group being the first timing advance;

7. The method according to any one of claims 4 to 6, wherein the first timing advance is a timing advance of a first timing process, the first timing process is one of a plurality of timing processes corresponding to the first carrier unit, and the timing advance corresponding to the first timing process is a timing advance corresponding to one of a plurality of groups of uplink transmission resources.

8. The method according to any of claims 4 to 6, wherein the uplink transmission resource is any of the following:

9. A network device, comprising:

the processing unit is used for determining a first timing advance of the terminal equipment on a 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, where the first carrier unit belongs to one of all carrier units included in a first timing advance group, the timing advance on all carrier units is the first timing advance, a timing adjustment unit of the first timing advance is N times of an inverse of a maximum subcarrier interval in subcarrier intervals indicated by multiple different parameter sets numerologies corresponding to all carrier units, and N is predefined by a system or configured through high layer signaling or physical layer signaling.

10. The network device of claim 9, wherein the first timing advance is a timing advance of a 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 plurality of timing processes are a plurality of timing advances corresponding to a plurality of sets of uplink transmission resources, wherein the plurality of timing processes correspond to the plurality of timing advances one to one, and the plurality of sets of uplink transmission resources correspond to the plurality of timing advances one to one.

11. The network device of claim 10, wherein the uplink transmission resource is any one of:

12. A terminal device, comprising:

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

a processing unit, configured to determine a first timing advance adjustment amount according to the first timing advance and a timing adjustment unit of the first timing advance, where the first timing advance adjustment amount is used to adjust a transmission time of an uplink signal on the first carrier unit, the first carrier unit belongs to one of all carrier units included in a first timing advance group, the timing advance on all carrier units is the first timing advance, the timing adjustment unit of the first timing advance is N times of a reciprocal of a maximum subcarrier interval in subcarrier intervals indicated by multiple different parameter sets numerologies corresponding to all carrier units, and N is predefined by a system or configured by high layer signaling or physical layer signaling.

13. The terminal device of claim 12, wherein the processing unit is further to:

determining an effective time of the first timing advance adjustment amount.

14. The terminal device of claim 13, wherein the first carrier unit belongs to a first timing advance group, and timing advances on all carrier units included in the first timing advance group are the first timing advance;

the processing unit is specifically configured to:

determining the effective time according to a first parameter set in a plurality of parameter sets included in the first timing advance group.

15. The terminal device according to any of claims 12 to 14, wherein the first timing advance is a timing advance of a first timing process, the first timing process is one of a plurality of timing processes corresponding to the first carrier unit, and the timing advance corresponding to the first timing process is a timing advance corresponding to one of a plurality of sets of uplink transmission resources.

16. The terminal device of claim 15, wherein the uplink transmission resource is any one of: