Wireless communication method, network device and terminal device

Abstract

Embodiments of the present application provide a wireless communication method and device, which can improve the communication performance in random access. The method comprises: a network device receiving a first random access request sent by a terminal device on a first uplink carrier; and based on the first uplink carrier, the network device sending a first random access response for the first random access request.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication, and more particularly, to a wireless communication method, a network device and a terminal device. BACKGROUND

[0002] In a Long Term Evolution (LTE) system, there is a fixed uplink carrier and a fixed downlink carrier (the uplink carrier and the downlink carrier can at least partially overlap in the frequency domain), and the terminal device and the network can use the fixed uplink carrier and the fixed downlink carrier for uplink and downlink communication, respectively. The terminal device can use the fixed uplink carrier for random access.

[0003] In future communication systems, higher requirements are placed on communication performance.

[0004] Therefore, how to improve the communication performance in terms of random access is an urgent problem to be solved. SUMMARY

[0005] Embodiments of the present application provide a wireless communication method and device, which can improve the communication performance in terms of random access.

[0006] In a first aspect, a wireless communication method is provided, comprising:

[0007] The network device receives a first random access request sent by a terminal device on a first uplink carrier.

[0008] Based on the first uplink carrier, the network device sends a first random access response for the first random access request.

[0009] Therefore, in the embodiments of the present application, the random access response is fed back based on the uplink carrier on which the random access request is sent, so that in the case where there are multiple uplink carriers, the source of the random access request to which the random access response is directed can be distinguished as much as possible.

[0010] In combination with the first aspect, in a possible implementation manner of the first aspect, based on the first uplink carrier, the network device sends a first random access response for the first random access request, comprising:

[0011] Based on the first uplink carrier, the network device determines at least one of the following:

[0012] The resource required for sending the first random access response, the first random access radio network temporary identifier (RA-RNTI) required for sending the first random access response, and the information indicating the source of the random access request in the first random access response;

[0013] determining the at least one, transmitting the first random access response.

[0014] With reference to any one of the preceding or following possible implementation manners of the first aspect, in a possible implementation manner of the first aspect, the resource required for transmitting the first random access response comprises a control resource set CORESET or a search space where a control channel carrying the first random access response is located.

[0015] With reference to any one of the preceding or following possible implementation manners of the first aspect, in a possible implementation manner of the first aspect, the control resource set CORESET or the search space where the control channel carrying the first random access response is located is different from the CORESET or the search space where a control channel carrying a second random access response is located; wherein the second random access response is a response to a second random access request on a second uplink carrier.

[0016] With reference to any one of the preceding or following possible implementation manners of the first aspect, in a possible implementation manner of the first aspect, a calculation formula of the first RA-RNTI is different from a calculation formula of a second RA-RNTI, or part of parameters in the calculation formula of the first RA-RNTI is different from part of parameters in the calculation formula of the second RA-RNTI; wherein the second RA-RNTI is a RA-RNTI required for a second random access response to a second random access request on a second uplink carrier.

[0017] With reference to any one of the preceding or following possible implementation manners of the first aspect, in a possible implementation manner of the first aspect, information carried by a random access request source field of the first random access response is different from information carried by a random access request source field of a second random access response; wherein the second random access response is a response to a second random access request on a second uplink carrier, and the random access request source field indicates an uplink carrier where the random access request is located.

[0018] With reference to any one of the preceding or following possible implementation manners of the first aspect, in a possible implementation manner of the first aspect, the first random access response carries a random access request source field, and the second random access response does not carry the random access request source field; wherein the second random access response is a response to a second random access request on a second uplink carrier, and the random access request source field indicates that the uplink carrier where the random access request is located is the first uplink carrier.

[0019] With reference to any one of the preceding or following possible implementation manners of the first aspect, in a possible implementation manner of the first aspect, the first uplink carrier and the second uplink carrier are located in different frequency bands.

[0020] With reference to any one of the preceding possible implementation manners of the first aspect, in a possible implementation manner of the first aspect, the method further comprises:

[0021] The network device sends configuration information to the terminal device, the configuration information being used to indicate at least one of the following: resources required for sending the first random response message, a determination manner or partial parameters of a first random access radio network temporary identifier required for sending the first random response message, and information carried by the first random access response.

[0022] In a second aspect, a wireless communication method is provided, comprising:

[0023] The network device determines, for each of a plurality of uplink carriers, configuration information for random access;

[0024] The network device sends the configuration information for each of the uplink carriers to the terminal device.

[0025] Therefore, the network device respectively configures the terminal device with configuration information for random access for each of a plurality of uplink carriers, so that the terminal device can use the respective configuration information corresponding to each uplink carrier for random access.

[0026] With reference to the second aspect, in a possible implementation manner of the second aspect, the configuration information comprises time domain resources and / or frequency domain resources used for sending a random access request on each of the uplink carriers; and wherein,

[0027] The time domain resources and / or frequency domain resources used for sending a random access request on different uplink carriers correspond to at least partially different RA-RNTIs.

[0028] With reference to any one of the preceding possible implementation manners of the second aspect, in a possible implementation manner of the second aspect, the configuration information for random access determined for different uplink carriers is different in at least one of the following:

[0029] Time-frequency resources occupied by the random access request and / or a sequence included in the random access request;

[0030] Resources for sending the random response message;

[0031] A determination manner or partial parameters of a random access radio network temporary identifier used for sending the random response message.

[0032] With reference to any one of the preceding possible implementation manners of the second aspect, in a possible implementation manner of the second aspect, the resources required for sending the random response message comprise a control resource set (CORESET) or a search space in which a control channel carrying the random access response is located.

[0033] With reference to any one of the preceding or following possible implementation manners of the second aspect, in a further possible implementation manner of the second aspect, the random access responses corresponding to the random access requests on the different uplink carriers are different in CORESET or search space where control channels of the random access responses are located.

[0034] With reference to any one of the preceding or following possible implementation manners of the second aspect, in a further possible implementation manner of the second aspect, the random access responses corresponding to the random access requests on the different uplink carriers are different in RA-RNTI calculation formula or in part of parameters in the RA-RNTI calculation formula.

[0035] With reference to any one of the preceding or following possible implementation manners of the second aspect, in a further possible implementation manner of the second aspect, the configuration information comprises configuration of an indication of a source of the random access request in the random access response corresponding to the random access request transmitted by each uplink carrier.

[0036] With reference to any one of the preceding or following possible implementation manners of the second aspect, in a further possible implementation manner of the second aspect, the random access responses corresponding to the random access requests on the different uplink carriers are different in information carried in a random access request source field; the random access request source field indicates an uplink carrier where the random access request is located.

[0037] With reference to any one of the preceding or following possible implementation manners of the second aspect, in a further possible implementation manner of the second aspect, the multiple uplink carriers comprise a first uplink carrier and a second uplink carrier, the first random access response carries a random access request source field, and the second random access response does not carry the random access request source field; the first random access response is a response to a first random access request on the first uplink carrier, the second random access response is a response to a second random access request on the second uplink carrier, and the random access request source field indicates that the uplink carrier where the random access request is located is the first uplink carrier.

[0038] With reference to any one of the preceding or following possible implementation manners of the second aspect, in a further possible implementation manner of the second aspect, the multiple uplink carriers are located in different frequency bands, respectively.

[0039] In a third aspect, a wireless communication method is provided, comprising:

[0040] The terminal device sends a first random access request to a network device on a first uplink carrier;

[0041] Based on the first uplink carrier, the terminal device acquires a first random access response sent by the network device for the first random access request.

[0042] In a possible implementation form of the third aspect, the terminal device obtains the first random access response sent by the network device for the first random access request based on the first uplink carrier, including:

[0043] In a possible implementation form of the third aspect, the terminal device determines at least one of the following based on the first uplink carrier:

[0044] the resource occupied by the first random access response, a first random access radio network temporary identifier (RA-RNTI) of the first random access response, and information indicating the source of the random access request in the first random access response;

[0045] The terminal device obtains the first random access response according to the at least one determined.

[0046] In another possible implementation form of the third aspect, the resource occupied by the first random response message includes a control resource set (CORESET) or a search space where a control channel carrying the first random access response is located.

[0047] In another possible implementation form of the third aspect, the CORESET or the search space where the control channel carrying the first random access response is located is different from the CORESET or the search space where the control channel carrying the second random access response is located; the second random access response is a response to a second random access request on a second uplink carrier.

[0048] In another possible implementation form of the third aspect, a calculation formula of the first RA-RNTI is different from a calculation formula of the second RA-RNTI, or part of parameters in the calculation formula of the first RA-RNTI is different from part of parameters in the calculation formula of the second RA-RNTI; the second RA-RNTI is required for a second random access response to a second random access request on a second uplink carrier.

[0049] In another possible implementation form of the third aspect, information carried by a random access request source field of the first random access response is different from information carried by a random access request source field of the second random access response; the second random access response is a response to a second random access request on a second uplink carrier, and the random access request source field indicates an uplink carrier where the random access request is located.

[0050] With reference to the third aspect or any one of the possible implementation manners of the third aspect, in a fourth possible implementation manner of the third aspect, the first random access response carries a random access request source field, and the second random access response does not carry the random access request source field; wherein the second random access response is a response to a second random access request on a second uplink carrier, and the random access request source field indicates that the uplink carrier where the random access request is located is the first uplink carrier.

[0051] With reference to the third aspect or any one of the possible implementation manners of the third aspect, in a fourth possible implementation manner of the third aspect, the first uplink carrier is different from the frequency band where the second uplink carrier is located.

[0052] With reference to the third aspect or any one of the possible implementation manners of the third aspect, in a fourth possible implementation manner of the third aspect, the method further comprises:

[0053] The terminal device receives configuration information sent by the network device, and the configuration information is used to indicate at least one of the following: resources occupied by the first random access response, a determination manner or part of parameters of a first random access radio network temporary identifier (RA-RNTI) of the first random access response, and information carried by the first random access response.

[0054] In a fourth aspect, a wireless communication method is provided, and the method further comprises:

[0055] The terminal device receives configuration information for random access on each uplink carrier in the plurality of uplink carriers by the network device.

[0056] According to the configuration information, random access is performed on at least part of the uplink carriers in the plurality of uplink carriers.

[0057] With reference to the fourth aspect, in a possible implementation manner of the fourth aspect, the configuration information comprises time domain resources and / or frequency domain resources used for sending a random access request on each uplink carrier in the plurality of uplink carriers; wherein,

[0058] The RA-RNTI corresponding to the time domain resources and / or the frequency domain resources used for sending the random access request on different uplink carriers are at least partially different.

[0059] With reference to the fourth aspect, in a possible implementation manner of the fourth aspect, the configuration information determined for different uplink carriers respectively for random access is different in at least one of the following:

[0060] Time-frequency resources occupied by the random access request and / or a sequence included in the random access request;

[0061] Resources for sending the random response message;

[0062] a determination manner or a part of parameters of a random access radio network temporary identifier of the random response message.

[0063] With reference to any one of the preceding or following possible implementation manners of the fourth aspect, in a possible implementation manner of the fourth aspect, the resource required for sending the random response message comprises a control resource set (CORESET) or a search space where a control channel carrying the random access response is located.

[0064] With reference to any one of the preceding or following possible implementation manners of the fourth aspect, in a possible implementation manner of the fourth aspect, the random access responses corresponding to the random access requests on the different uplink carriers are located in different control resource sets (CORESETs) or search spaces.

[0065] With reference to any one of the preceding or following possible implementation manners of the fourth aspect, in a possible implementation manner of the fourth aspect, the random access responses corresponding to the random access requests on the different uplink carriers are calculated by different formulas or have different part of parameters in the formulas.

[0066] With reference to any one of the preceding or following possible implementation manners of the fourth aspect, in a possible implementation manner of the fourth aspect, the configuration information comprises configuration of an indication of a source of the random access request in the random access response corresponding to each uplink carrier transmission.

[0067] With reference to any one of the preceding or following possible implementation manners of the fourth aspect, in a possible implementation manner of the fourth aspect, the random access responses corresponding to the random access requests on the different uplink carriers carry different information in a random access request source field; the random access request source field indicates an uplink carrier where the random access request is located.

[0068] With reference to any one of the preceding or following possible implementation manners of the fourth aspect, in a possible implementation manner of the fourth aspect, the multiple uplink carriers comprise a first uplink carrier and a second uplink carrier, a first random access response carries a random access request source field, and a second random access response does not carry the random access request source field; the first random access response is a response to a first random access request on the first uplink carrier, the second random access response is a response to a second random access request on the second uplink carrier, and the random access request source field indicates that the uplink carrier where the random access request is located is the first uplink carrier.

[0069] With reference to any one of the preceding or following possible implementation manners of the fourth aspect, in a possible implementation manner of the fourth aspect, the multiple uplink carriers are located in different frequency bands, respectively.

[0070] In a fifth aspect, a network device is provided for performing the method in the first aspect or any possible implementation of the first aspect or the method in the second aspect or any possible implementation of the second aspect. Specifically, the network device comprises function modules for performing the method in the first aspect or any possible implementation of the first aspect or the method in the second aspect or any possible implementation of the second aspect.

[0071] In a sixth aspect, a terminal device is provided for performing the method in the third aspect or any possible implementation of the third aspect or the method in the fourth aspect or any possible implementation of the fourth aspect. Specifically, the terminal device comprises function modules for performing the method in the second aspect or any possible implementation of the second aspect or the method in the fourth aspect or any possible implementation of the fourth aspect.

[0072] In a seventh aspect, a network device is provided, comprising a processor, a memory and a transceiver. The processor, the memory and the transceiver communicate with each other through internal connection paths, transfer control and / or data signals, so that the network device performs the method in the first aspect or any possible implementation of the first aspect or the method in the third aspect or any possible implementation of the third aspect.

[0073] In an eighth aspect, a terminal device is provided, comprising a processor, a memory and a transceiver. The processor, the memory and the transceiver communicate with each other through internal connection paths, transfer control and / or data signals, so that the network device performs the method in the second aspect or any possible implementation of the second aspect or the method in the fourth aspect or any possible implementation of the fourth aspect.

[0074] In a ninth aspect, a computer readable medium is provided for storing a computer program, the computer program comprising instructions for performing any of the methods or any possible implementation.

[0075] In a tenth aspect, a computer program product is provided comprising instructions which, when executed on a computer, cause the computer to carry out the method of any of the methods or any possible implementation. BRIEF DESCRIPTION OF DRAWINGS

[0076] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0077] Figure 1is a schematic diagram of a wireless communication system according to an embodiment of the application.

[0078] Figure 2 is a schematic diagram of a link carrier in terms of resource division according to an embodiment of the application.

[0079] Figure 3 is a schematic diagram of a link carrier in terms of resource division according to an embodiment of the application.

[0080] Figure 4 is a schematic diagram of a link carrier in terms of resource division according to an embodiment of the application.

[0081] Figure 5 is a schematic diagram of a link carrier in terms of resource division according to an embodiment of the application.

[0082] Figure 6 is a schematic flow chart of a wireless communication method according to an embodiment of the application.

[0083] Figure 7 is a schematic flow chart of a wireless communication method according to an embodiment of the application.

[0084] Figure 8 is a schematic block diagram of a network device according to an embodiment of the application.

[0085] Figure 9 is a schematic block diagram of a network device according to an embodiment of the application.

[0086] Figure 10 is a schematic block diagram of a terminal device according to an embodiment of the application.

[0087] Figure 11 is a schematic block diagram of a terminal device according to an embodiment of the application.

[0088] Figure 12 is a schematic block diagram of a system chip according to an embodiment of the application.

[0089] Figure 13 is a schematic block diagram of a communication device according to an embodiment of the application. DETAILED DESCRIPTION

[0090] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0091] The technical solutions of the embodiments 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, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a Long Term Evolution (LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunication System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication system, or a future 5G system (which can also be referred to as a New Radio (NR) system, etc.

[0092] It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and / or" herein is only used to describe an associated relationship with the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects.

[0093] Figure 1 A wireless communication system 100 to which the embodiments of the present application are applied is shown.

[0094] It should be understood that Figure 1 Exemplarily, one network device and two terminal devices are shown, and optionally, the wireless communication system 100 can include multiple network devices and each network device can include other numbers of terminal devices within the coverage range of the network device, which is not limited by the embodiments of the present application.

[0095] Optionally, the wireless communication system 100 can further include a network controller, a mobile management entity, and other network entities, which are not limited by the embodiments of the present application.

[0096] As Figure 1As shown, the wireless communication system 100 can include a network device 110. The network device 100 can be a device that communicates with terminal devices. The network device 100 can provide communication coverage for a particular geographic area and can communicate with terminal devices (e.g., UEs) located in the coverage area. Optionally, the network device 100 can be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, an evolved base station (eNB or eNodeB) in an LTE system, or a radio controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device can be a relay station, an access point, a vehicle-mounted device, a wearable device, a network-side device in a future 5G network, or a network device in a future evolved PLMN, etc.

[0097] The wireless communication system 100 also includes at least one terminal device 120 located in the coverage area of the network device 110. The terminal device 120 can be mobile or fixed. Optionally, the terminal device 120 can refer to an access terminal, a user equipment (User Equipment, UE), a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user apparatus. The access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device, or other processing devices connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network, or a terminal device in a future evolved PLMN, etc.

[0098] Optionally, the terminal devices 120 can communicate with each other through Device to Device (D2D) communication.

[0099] Optionally, the 5G system or network can also be referred to as a New Radio (NR) system or network.

[0100] High-frequency bands are important candidate bands for deploying 5G (NR) networks. However, due to their higher frequency, their coverage is relatively limited (compared to low-frequency LTE). For the downlink (DL), the coverage is improved by network equipment's higher transmit power and features such as massive MIMO (hybrid beamforming). However, due to the limited transmit power of terminal equipment, UL coverage will become a bottleneck.

[0101] Therefore, an uplink (UL) carrier can be deployed at a low frequency for NR transmission. This UL carrier can be called a supplementary uplink (SUL) carrier. In this way, NR has at least two UL carriers: one SUL carrier and the other a high-frequency UL carrier (which can be called a dedicated UL for NR).

[0102] For example, such as Figure 2 and Figure 3 As shown, the NR system may include a high-frequency UL carrier in band f0 and a low-frequency UL carrier in band f1.

[0103] Among them, such as Figure 2 As shown, the high-frequency UL carrier in frequency band f0 and the high-frequency DL carrier in frequency band f0 are frequency-division multiplexed (FDD), or, as... Figure 3 As shown, the high-frequency UL carrier in frequency band f0 and the high-frequency DL carrier in frequency band f1 are time-division multiplexed (TDD).

[0104] Optionally, the SUL carrier can also share spectrum resources with the LTE system; that is, on f1, only a portion of the resources are available for NR, while the rest are used for LTE. Resource sharing can be achieved through Frequency Division Multiplexing (FDM) or Time Division Multiplexing (TDM) (e.g., ...). Figure 4 and 5 (The TDM method shown).

[0105] It should be understood that although the above description uses two UL carriers in an NR system as an example, the embodiments of this application are not limited to this. For example, the NR system may also have three or more UL carriers.

[0106] It should also be understood that in the embodiments of the present application, the plurality of UL carriers included in the NR system can all be used for uplink transmission by the terminal device, but in the configuration, only some of the UL carriers can be configured for the terminal device to perform uplink transmission.

[0107] Optionally, the number of UL carriers used by the terminal device and which specific UL carrier can be dynamically changed by the network device.

[0108] Optionally, after the terminal device initiates the PRACH preamble, the terminal device monitors the random access request (RAR) of the network device at the corresponding position. The network device uses the random access radio network temporary identity (RA-RNTI) to send the random access response, and the terminal device uses the same TA-RNTI to receive the random access response.

[0109] In the LTE system, the following three methods can be used to calculate the RA-RNTI.

[0110] In one method, RA-RNTI = 1 + t_id + 10*f_id Formula 1

[0111] t_id is the index of the first subframe of the specified PRACH resource, and f_id is the index of the PRACH specified in the subframe in the order of increasing frequency domain.

[0112] In another method,

[0113] RA-RNTI = 1 + t_id + 10*f_id + 60*(SFN_id mod(Wmax / 10)) Formula 2

[0114] Wherein, t_id is the index of the first subframe of the specified PRACH resource, f_id is the index of the PRACH specified in the subframe in the order of increasing frequency domain, SFN_id is the index of the first radio frame of the specified PRACH resource, and Wmax is 400

[0115] In another implementation, RA-RNTI = 1 + floor(SFN_id / 4) Formula 3

[0116] Wherein, SFN_id is the index of the first radio frame of the specified PRACH resource.

[0117] It should be understood that the above methods of obtaining RA-RNTI are only a few implementation methods, and other implementation methods can also exist in the embodiments of the present application.

[0118] In the NR system, the way of obtaining the RA-RNTI can be the same as or different from that in the LTE system.

[0119] If two terminal devices send random access requests (including random access codes, i.e., random access preambles) from the NR dedicated UL carrier and the SUL carrier respectively, it is possible that the two terminal devices receive the same RAR and cannot distinguish which preamble the RAR corresponds to.

[0120] Therefore, for the above scenario in which multiple uplink carriers exist, the embodiments of the present application provide the following solutions for random access.

[0121] Figure 6 is a schematic flowchart of a wireless communication method 200 according to an embodiment of the present application. The method 200 can optionally be applied to the system shown in Figure 1 but is not limited thereto. The method 200 includes at least part of the following.

[0122] In 210, the terminal device sends a first random access request to the network device on a first uplink carrier.

[0123] In 220, the network device receives the first random access request sent by the terminal device on the first uplink carrier.

[0124] In 230, based on the first uplink carrier, the network device sends a first random access response for the first random access request.

[0125] In 240, based on the first uplink carrier, the terminal device obtains the first random access response sent by the network device for the first random access request.

[0126] Therefore, in the embodiments of the present application, the random access response is fed back based on the uplink carrier on which the random access request is sent, so that the source of the random access request to which the random access response corresponds can be distinguished as much as possible in the case where multiple uplink carriers exist.

[0127] Optionally, based on the first uplink carrier, the network device determines at least one of the following: a resource required for sending the first random access response, a first random access radio network temporary identifier (RA-RNTI) required for sending the first random access response, and information indicating a source of the random access request in the first random access response; and sends the first random access response according to the determined at least one. Correspondingly, based on the first uplink carrier, the terminal device determines at least one of the following: a resource occupied by the first random access response, a first random access radio network temporary identifier (RA-RNTI) of the first random access response, and information indicating a source of the random access request in the first random access response; and acquires the first random access response according to the determined at least one.

[0128] Optionally, the network device sends configuration information to the terminal device, the configuration information being used to indicate at least one of the following: a resource required for sending the first random response message, a determination manner or a partial parameter of a first random access radio network temporary identifier required for sending the first random response message, and information carried in the first random access response (i.e., information indicating a source of the random access request).

[0129] It should be understood that the resource required for sending the first random response message, the determination manner or the partial parameter of the first random access radio network temporary identifier required for sending the first random response message, and the information carried in the first random access response can also be preset on the terminal device, without the configuration of the network device.

[0130] Optionally, in the embodiments of the present application, the resource required for sending the first random response message determined based on the first uplink carrier includes a control resource set (CORESET) or a search space in which a control channel carrying the first random access response is located.

[0131] Optionally, the control resource set (CORESET) or the search space in which the control channel carrying the first random access response is located is different from a CORESET or a search space in which a control channel carrying a second random access response is located; the second random access response is a response to a second random access request on a second uplink carrier.

[0132] Specifically, after UE transmits a physical random access channel (PRACH) preamble on an UL carrier, it needs to monitor the network's random access response (RAR). In NR, the reception of the random access response requires first detecting a control channel (NR-PDCCH). The network device configures the control channel differently, so that after transmitting a preamble on different ULs, different control channels are detected. Some specific configuration options are as follows:

[0133] In one way, CORESET 1 or CORESET group 1 (i.e., containing multiple CORESETs) is used for the control channel resource of the RAR reception corresponding to the preamble transmitted on the NR dedicated UL; CORESET 2 or CORESET group 2 (i.e., containing multiple CORESETs) is used for the control channel resource of the RAR reception corresponding to the preamble transmitted on the NR SUL

[0134] In another way, search space 1 is used for the control channel resource of the RAR reception corresponding to the preamble transmitted on the NR dedicated UL; search space 2 is used for the control channel resource of the RAR reception corresponding to the preamble transmitted on the NR SUL.

[0135] Optionally, the information carried by the random access request source field of the first random access response is different from the information carried by the random access request source field of the second random access response; wherein the second random access response is a response to a second random access request on a second uplink carrier, and the random access request source field indicates the uplink carrier on which the random access request is located.

[0136] Specifically, the network device carries information in the random access response to indicate which UL link the random access request belongs to. For example, the RAR indicates that the random access request belongs to the NR dedicated UL link or the SUL link.

[0137] Optionally, the first random access response carries a random access request source field, and the second random access response does not carry a random access request source field; wherein the second random access response is a response to a second random access request on a second uplink carrier, and the random access request source field indicates that the uplink carrier on which the random access request is located is the first uplink carrier.

[0138] Specifically, the network device carries information in the random access response to indicate which UL link the random access request belongs to. For example, if the RAR does not indicate which UL link the random access request belongs to, the corresponding default UL link (for example, the NR dedicated UL link) is used, and if indicated, the indicated UL link (for example, the SUL link) is used.

[0139] Optionally, in the embodiment of the present application, the first uplink carrier and the second uplink carrier mentioned above are in different frequency bands. For example, the first uplink carrier is Figures 2-5 the SUL carrier mentioned above, and the second uplink carrier is Figures 2-5 the dedicated UL carrier mentioned above.

[0140] Optionally, the calculation formula of the first RA-RNTI is different from the calculation formula of the second RA-RNTI, or part of the parameters in the calculation formula of the first RA-RNTI is different from part of the parameters in the calculation formula of the second RA-RNTI; wherein the second RA-RNTI is the RA-RNTI required for the second random access response to the second random access request on the second uplink carrier.

[0141] Specifically, after the UE transmits the PRACH preamble on the UL carrier, it needs to monitor the random access response RAR of the network. In NR, the reception of the random access response needs to detect the control channel (NR-PDCCH) first. The transmission of the control channel is scrambled by the RA-RNTI. Different RA-RNTIs can be used to distinguish the RAR corresponding to different preambles. For the case of supporting SUL for random access, compared with the dedicated UL carrier, an additional term can be introduced in the formula of the RA-RNTI, which is associated with the SUL, so that the RA-RNTI corresponding to the preamble on the two ULs can be avoided. For example, without SUL, the value range of the RA-RNTI is [x y] (y > x >= 0). Then for the preamble transmitted on the SUL, the calculation of the RA-RNTI can increase a term Z (Z > y) on the basis of the above technology, so that the RA-RNTI corresponding to the two ULs can be avoided.

[0142] For example, for the dedicated UL carrier, the formula for calculating the RA-RNTI can be formula 1, formula 1 or formula 3, and then Z can be added to formula 1, formula 2 and formula 3 respectively as the formula for calculating the SUL carrier.

[0143] Of course, Z can also be not greater than y, so that the RA-RNTI cannot be completely avoided, but the probability of the same RA-RNTI can be reduced.

[0144] Figure 7 is a schematic flowchart of a wireless communication method 300 according to an embodiment of the present application. The method 300 includes at least part of the following.

[0145] In 310, the network device determines configuration information for random access for each of a plurality of uplink carriers respectively.

[0146] Optionally, the plurality of uplink carriers are in different frequency bands respectively.

[0147] In 320, the network device sends the configuration information for the each uplink carrier to the terminal device.

[0148] In 330, the terminal device receives the configuration information for random access for each of a plurality of uplink carriers from the network device;

[0149] In 340, according to the configuration information, random access is performed on at least part of the plurality of uplink carriers.

[0150] Therefore, the network device respectively configures the terminal device with configuration information for random access for each of a plurality of uplink carriers, so that the terminal device can use the respective configuration information corresponding to each uplink carrier for random access when performing random access.

[0151] Optionally, the configuration information includes time domain resources and / or frequency domain resources used for sending a random access request on the each uplink carrier; wherein the time domain resources and / or frequency domain resources used for sending a random access request on different uplink carriers correspond to at least partially different RA-RNTIs.

[0152] Specifically, when the network device configures random access channel (RACH) resources corresponding to different UL links, the network device coordinates the time-frequency and / or frequency domain resources of the RACH to avoid or reduce the probability of collision of RA-RNTIs corresponding to preambles on two UL carriers.

[0153] Optionally, the configuration information for random access determined for different uplink carriers respectively is different in at least one of the following:

[0154] Time-frequency resources occupied by the random access request and / or a sequence included in the random access request;

[0155] Resources for sending a random response message;

[0156] A determination manner or part of parameters of a random access radio network temporary identifier for sending a random response message.

[0157] Optionally, the resource required for sending the random response message comprises a control resource set (CORESET) or a search space where a control channel carrying the random access response is located.

[0158] Optionally, the CORESET or the search space where the control channel of the random access response corresponding to the random access request on different uplink carriers is located is different.

[0159] Optionally, the calculation formula of the RA-RNTI of the random access response corresponding to the random access request on different uplink carriers is different or part of the parameters in the calculation formula is different.

[0160] Optionally, the configuration information comprises configuration of an indication of the source of the random access request in the random access response corresponding to the random access request transmitted on each uplink carrier.

[0161] Optionally, the information carried by the random access request source field in the random access response corresponding to the random access request on different uplink carriers is different; wherein the random access request source field indicates the uplink carrier where the random access request is located.

[0162] Optionally, the multiple uplink carriers comprise a first uplink carrier and a second uplink carrier, the first random access response carries a random access request source field, and the second random access response does not carry the random access request source field; wherein the first random access response is a response to a first random access request on the first uplink carrier, the second random access response is a response to a second random access request on the second uplink carrier, and the random access request source field indicates that the uplink carrier where the random access request is located is the first uplink carrier.

[0163] It should be understood that the description of the method 200 and the method 300 can be mutually referenced, and the method 200 and the method 300 can be used in combination. For the sake of brevity, the description is not repeated here.

[0164] Figure 8 is a schematic block diagram of a network device 400 according to an embodiment of the present application. As shown in the figure, the network device 400 comprises a receiving unit and a sending unit. Figure 8

[0165] The receiving unit 410 is configured to receive a first random access request sent by a terminal device on a first uplink carrier; and the sending unit 420 is configured to send a first random access response corresponding to the first random access request based on the first uplink carrier.

[0166] ​It should be understood that the network device 400 can perform the corresponding operations of the network device in the above method 200, which will not be repeated here for brevity.

[0167] Figure 9 is a schematic block diagram of a network device 500 according to an embodiment of the present application. As shown in the figure, the network device 500 includes a processing unit 510 and a communication unit 520; wherein, Figure 9

[0168] The processing unit 510 is configured to determine configuration information when performing random access for each of a plurality of uplink carriers respectively.

[0169] The communication unit 520 is configured to send the configuration information for each uplink carrier to a terminal device.

[0170] It should be understood that the network device 500 can perform the corresponding operations of the network device in the above method 300, which will not be repeated here for brevity.

[0171] Figure 10 is a schematic block diagram of a terminal device 600 according to an embodiment of the present application. As shown in the figure, the terminal device 600 includes a sending unit 610 and a receiving unit 620; wherein, Figure 10

[0172] The sending unit 610 is configured to send a first random access request to a network device on a first uplink carrier; and the receiving unit 620 is configured to obtain a first random access response sent by the network device for the first random access request based on the first uplink carrier.

[0173] It should be understood that the terminal device 600 can perform the corresponding operations of the terminal device in the above method 200, which will not be repeated here for brevity.

[0174] Figure 11 is a schematic block diagram of a terminal device 700 according to an embodiment of the present application. As shown in the figure, the terminal device 700 includes a receiving unit 710 and an access unit 720; Figure 11

[0175] The receiving unit 710 is configured to receive configuration information of a network device when performing random access on each of a plurality of uplink carriers; and the access unit 720 is configured to perform random access on at least part of the plurality of uplink carriers according to the configuration information.

[0176] It should be understood that the terminal device 700 can perform the corresponding operations of the terminal device in the above method 300, which will not be repeated here for brevity. ​​​

[0177] Figure 12 is a schematic structural diagram of a system chip 800 according to an embodiment of the present application. Figure 12 The system chip 800 comprises an input interface 801, an output interface 802, a processor 803 and a memory 804, which are connected through internal communication connection lines. The processor 803 is configured to execute code in the memory 804.

[0178] Optionally, the processor 803 implements the method performed by the network device in the method embodiment when the code is executed. For brevity, details are not repeated here.

[0179] Optionally, the processor 803 implements the method performed by the terminal device in the method embodiment when the code is executed. For brevity, details are not repeated here.

[0180] Figure 13 is a schematic block diagram of a communication device 900 according to an embodiment of the present application. As shown in the figure, the communication device 900 comprises a processor 910 and a memory 920. The memory 920 can store program code, and the processor 910 can execute the program code stored in the memory 920. Figure 13

[0181] Optionally, as shown in the figure, the communication device 900 can comprise a transceiver 930, and the processor 910 can control the transceiver 930 to communicate with the outside. Figure 13

[0182] Optionally, the processor 910 can invoke the program code stored in the memory 920 to perform the corresponding operation of the network device in the method embodiment. For brevity, details are not repeated here.

[0183] Optionally, the processor 910 can invoke the program code stored in the memory 920 to perform the corresponding operation of the terminal device in the method embodiment. For brevity, details are not repeated here.

[0184] ​​It should be understood that the processor of the embodiments of the present application can be an integrated circuit chip having a signal processing capability. In the implementation process, each step of the method embodiments described above can be completed by the integrated logic circuit of hardware or the instruction in the form of software in the processor. The processor described above can be a general processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component. The disclosed methods, steps and logic block diagrams in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as a hardware code processor for execution, or can be executed by a combination of hardware and software modules in the code processor. The software module can be located in a random access memory, a flash memory, a read only memory, a programmable read only memory or an electrically erasable programmable memory, a register or other mature storage medium in the art. 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.

[0185] It can be appreciated that the memory in the embodiments of the present application can be a volatile memory or a nonvolatile memory, or can include both volatile and nonvolatile memory. Among them, the nonvolatile memory can be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically EPROM (EEPROM), or a flash memory. The volatile memory can be a Random Access Memory (RAM) used as an external cache. By way of example, but not limitation, many forms of RAM can be used, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory of the system and method described herein is intended to include, but not be limited to, these and any other suitable types of memory.

[0186] Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether the functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0187] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be described here.

[0188] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other manners. For example, the described device embodiments are merely schematic. The division of the units is merely logical function division. There can be other division manners in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, devices or units, and can be in electrical, mechanical or other forms.

[0189] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place, or can 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 embodiment.

[0190] In addition, each functional unit in the various embodiments of the present application can be integrated into a processing unit, or each unit can be a physically separate unit, or two or more units can be integrated into one unit.

[0191] If the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application can be embodied in the form of a software product, and the computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the 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 various program code storage media.

[0192] The above description is merely a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method of wireless communication, the method comprising: The method comprises: The network device receives a random access request sent by a terminal device on a high-frequency uplink carrier or a supplementary uplink (SUL) carrier, wherein a frequency band f1 of the SUL carrier is lower than a frequency band f0 of the high-frequency uplink carrier, and the high-frequency uplink carrier and a high-frequency downlink carrier are transmitted in a time division duplex (TDD) manner at the frequency band f0; The network device sends a random access response for the random access request, The network device sends a random access response for the random access request, comprising: sending the random access response according to a random access radio network temporary identifier (RA-RNTI) required by the network device for sending the random access response and a control resource set (CORESET) required by the network device for sending the random access response; The calculation formula of a first RA-RNTI required for sending a first random access response on the SUL carrier is based on a calculation formula of a second RA-RNTI required for sending a second random access response on the high-frequency uplink carrier, and an associated parameter of the SUL carrier is added to the calculation formula; When the second random access response is sent on the high-frequency uplink carrier, the value range of the second RA-RNTI is [x, y], where y > x ≥ 0; when the first random access response is sent on the SUL carrier, the value range of the first RA-RNTI is [x+Z, y+Z], where Z is the associated parameter and has a value greater than the maximum value in the range of x to y, The network device carries information in the random access response to indicate which uplink carrier the random access request belongs to; the first random access response carries an indication of which uplink carrier the random access request belongs to, corresponding to the SUL carrier; the second random access response does not carry an indication of which uplink carrier the random access request belongs to, corresponding to the default high-frequency uplink carrier, and The first CORESET where a control channel carrying the first random access response is located is different from the second CORESET where a control channel carrying the second random access response is located.

2. The method of claim 1, wherein, The method further comprises: The network device sends configuration information to the terminal device, and the configuration information is used to indicate at least one of the following: a resource required for sending the first random response message, a determination method or a part of a parameter of a first random access radio network temporary identifier required for sending the first random response message, and information carried by the first random access response.

3. A method of wireless communication, the method comprising: The method comprises: A terminal device sends a random access request to a network device on a high-frequency uplink carrier or a supplementary uplink (SUL) carrier, wherein a frequency band f1 of the SUL carrier is lower than a frequency band f0 of the high-frequency uplink carrier, and the high-frequency uplink carrier and a high-frequency downlink carrier are transmitted in a time division duplex (TDD) manner at the frequency band f0; The terminal device obtains a random access response sent by the network device for the random access request, The terminal device acquires the random access response sent by the network device for the random access request, including: acquiring the random access response according to the random access radio network temporary identifier (RA-RNTI) of the random access response determined by the terminal device and the control resource set (CORESET) corresponding to the random access response. The calculation formula of the first random access response acquisition first RA-RNTI of the SUL carrier is based on the calculation formula of the second random access response acquisition second RA-RNTI of the high-frequency uplink carrier, and an associated parameter of the SUL carrier is added. The value range of the second RA-RNTI is [x, y] when the high-frequency uplink carrier acquires the second random access response, where y > x ≥ 0; the value range of the first RA-RNTI is [x+Z, y+Z] when the SUL carrier acquires the first random access response, where Z is the associated parameter and the value is greater than the maximum value of the range of x to y, The first random access response carries an indication of which uplink carrier the random access request belongs to, corresponding to the SUL carrier; the second random access response does not carry an indication of which uplink carrier the random access request belongs to, corresponding to the default high-frequency uplink carrier, and The first CORESET where the control channel carrying the first random access response is located is different from the second CORESET where the control channel carrying the second random access response is located.

4. The method of claim 3, wherein, The method further comprises: The terminal device receives configuration information sent by the network device, and the configuration information is used to indicate at least one of the following: resources occupied by sending the first random access response, a determination method or part of parameters of a first random access radio network temporary identifier (RA-RNTI) of the first random access response, and information carried by the first random access response.

5. A network device, comprising: The receiving unit is configured to receive a random access request sent by a terminal device on a high-frequency uplink carrier or a supplementary uplink (SUL) carrier, where the frequency band f1 of the SUL carrier is lower than the frequency band f0 of the high-frequency uplink carrier, and the high-frequency uplink carrier and a high-frequency downlink carrier are transmitted in a time division duplex (TDD) manner at the frequency band f0. The sending unit is configured to send a random access response for the random access request, The sending unit is further configured to send the random access response according to a random access radio network temporary identifier (RA-RNTI) required for sending the random access response and a control resource set (CORESET) required for sending the random access response, which are determined by the network device. The calculation formula of the first RA-RNTI required for sending the first random access response of the SUL carrier is based on the calculation formula of the second RA-RNTI required for sending the second random access response of the high-frequency uplink carrier, and an associated parameter of the SUL carrier is added. ​ wherein, when the second random access response is sent on the high frequency uplink carrier, the second RA-RNTI has a value range of [x, y], wherein y > x ≥ 0; when the first random access response is sent on the SUL carrier, the first RA-RNTI has a value range of [x + Z, y + Z], wherein Z is the associated parameter and has a value greater than the maximum value of the range of x to y, wherein, the sending unit carries information in the random access response to indicate which uplink carrier the random access request belongs to; the first random access response carries an indication of which uplink carrier the random access request belongs to, corresponding to the SUL carrier; the second random access response does not carry an indication of which uplink carrier the random access request belongs to, corresponding to the default high frequency uplink carrier, and wherein, a first CORESET where a control channel carrying the first random access response is located is different from a second CORESET where a control channel carrying the second random access response is located.

6. The network device of claim 5, wherein, The sending unit is further configured to send, to the terminal device, configuration information, the configuration information being used to indicate at least one of the following: resources required for sending the first random response message, a determination manner or a part of parameters of a first random access radio network temporary identifier required for sending the first random response message, and information carried by the first random access response.

7. A terminal device, characterized by comprising: The terminal device comprises a sending unit and a receiving unit. The sending unit is configured to send, to a network device, a random access request on a high frequency uplink carrier or a supplementary uplink (SUL) carrier, wherein a frequency band f1 of the SUL carrier is lower than a frequency band f0 of the high frequency uplink carrier, and the high frequency uplink carrier and a high frequency downlink carrier are transmitted in a time division duplex (TDD) manner at the frequency band f0. The receiving unit is configured to obtain a random access response sent by the network device for the random access request, wherein, the receiving unit is further configured to obtain the random access response according to a random access radio network temporary identifier (RA-RNTI) of the random access response determined by the terminal device and a control resource set (CORESET) corresponding to the random access response; wherein, a calculation formula of a first RA-RNTI of the first random access response obtained on the SUL carrier is based on a calculation formula of a second RA-RNTI of the second random access response obtained on the high frequency uplink carrier, and an associated parameter of the SUL carrier is added to the calculation formula of the second RA-RNTI; wherein, when the second random access response is obtained on the high frequency uplink carrier, the second RA-RNTI has a value range of [x, y], wherein y > x ≥ 0; when the first random access response is obtained on the SUL carrier, the first RA-RNTI has a value range of [x + Z, y + Z], wherein Z is the associated parameter and has a value greater than the maximum value of the range of x to y, wherein, when the second random access response is obtained on the high frequency uplink carrier, the second RA-RNTI has a value range of [x, y], wherein y > x ≥ 0; when the first random access response is obtained on the SUL carrier, the first RA-RNTI has a value range of [x + Z, y + Z], wherein Z is the associated parameter and has a value greater than the maximum value of the range of x to y, The information carried in the random access response received by the receiving unit is used to indicate which uplink carrier the random access request belongs to; the first random access response carries an indication of which uplink carrier the random access request belongs to, corresponding to the SUL carrier; the second random access response does not carry an indication of which uplink carrier the random access request belongs to, corresponding to the default high-frequency uplink carrier, and The first CORESET where the control channel carrying the first random access response is located is different from the second CORESET where the control channel carrying the second random access response is located.

8. The terminal device according to claim 7, characterized by The terminal device further comprises: The terminal device receives configuration information sent by the network device, and the configuration information is used to indicate at least one of the following: resources occupied by the first random access response, a determination method or part of parameters of a first random access radio network temporary identifier (RA-RNTI) of the first random access response, and information carried by the first random access response.

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