CN112970219B

CN112970219B - Resource determination method and device and terminal

Info

Publication number: CN112970219B
Application number: CN201980073855.8A
Authority: CN
Inventors: 石聪
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-05-13
Filing date: 2019-05-13
Publication date: 2023-04-28
Anticipated expiration: 2039-05-13
Also published as: CN112970219A; WO2020227907A1

Abstract

The embodiment of the application provides a resource determining method, a resource determining device and a terminal, wherein the method comprises the following steps: and the terminal executes LBT failure on the transmission resources of the first message or the second message, wherein the transmission resources of the first message or the second message are positioned in a first frequency domain range, and the terminal selects the transmission resources for retransmitting the first message in a second frequency domain range.

Description

Resource determination method and device and terminal

Technical Field

The embodiment of the application relates to the technical field of mobile communication, in particular to a resource determining method, a resource determining device and a resource determining terminal.

Background

In a New wireless unlicensed (NR-U) system, a terminal needs to perform listen before talk (Listen Before Talk, LBT) to transmit an uplink signal. To improve transmission opportunities for msg3 in the random access procedure, the terminal may be scheduled with transmission opportunities for multiple msg3 through a random access response (Random Access Response, RAR), or configured with transmission opportunities for multiple msg3 in the time domain, and if the terminal fails to perform LBT on all transmission opportunities for msg3, the terminal immediately reselects a random access opportunity (RACH transmission, RO) resource and then transmits msg1. However, when the terminal reselects the RO resource of msg1, there is a possibility that the LBT still fails, which may result in a decrease in random access performance.

Disclosure of Invention

The embodiment of the application provides a resource determining method, a resource determining device and a terminal.

The resource determining method provided by the embodiment of the application comprises the following steps:

and the terminal executes LBT failure on the transmission resources of the first message or the second message, wherein the transmission resources of the first message or the second message are positioned in a first frequency domain range, and the terminal selects the transmission resources for retransmitting the first message in a second frequency domain range.

The resource determining device provided by the embodiment of the application is applied to a terminal, and the device comprises:

and the resource selection unit is used for selecting the transmission resource for retransmitting the first message in the second frequency domain range if the LBT (local binary pattern) fails to be executed on the transmission resource of the first message or the transmission resource of the second message, wherein the transmission resource of the first message or the transmission resource of the second message is positioned in the first frequency domain range.

The terminal provided by the embodiment of the application comprises a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the resource determination method.

The chip provided by the embodiment of the application is used for realizing the resource determining method.

Specifically, the chip includes: and a processor for calling and running the computer program from the memory, so that the device mounted with the chip executes the resource determining method.

The computer readable storage medium provided in the embodiments of the present application is used for storing a computer program, where the computer program makes a computer execute the above-mentioned resource determining method.

The computer program product provided by the embodiment of the application comprises computer program instructions, wherein the computer program instructions enable a computer to execute the resource determination method.

The computer program provided in the embodiments of the present application, when executed on a computer, causes the computer to perform the above-described resource determination method.

Through the technical scheme, when the terminal initiates the transmission of the first message (such as msg 1), the transmission resource of the first message (such as msg 1) is selected by avoiding the resource of LBT failure as much as possible based on the condition that the LBT is failed by the transmission resource of the last first message (such as msg 1) or the second message (such as msg 3), so that the probability of successful LBT execution of the transmission resource of the first message (such as msg 1) is improved, and the random access performance is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

Fig. 1 is a schematic diagram of a communication system architecture provided in an embodiment of the present application;

fig. 2 is a flowchart of a four-step random access procedure provided in an embodiment of the present application;

fig. 3-1 is a first structure diagram of a MAC PDU according to an embodiment of the present application;

FIG. 3-2 is a block diagram of an E/T/R/R/BI sub-header provided in an embodiment of the present application;

FIGS. 3-3 are block diagrams of E/T/RAPID subheader provided by embodiments of the present application;

fig. 3-4 are block diagrams of a MAC RAR provided in an embodiment of the present application;

fig. 4 is a schematic flow chart of a resource determining method according to an embodiment of the present application;

fig. 5 is a schematic diagram of RO resources provided in an embodiment of the present application;

FIG. 6 is a first schematic diagram of resource selection according to an embodiment of the present application;

FIG. 7 is a second schematic diagram of resource selection according to an embodiment of the present disclosure;

fig. 8 is a third schematic diagram of resource selection provided in an embodiment of the present application;

fig. 9 is a schematic structural diagram of a resource determining device according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

FIG. 11 is a schematic block diagram of a chip of an embodiment of the present application;

fig. 12 is a schematic block diagram of a communication system provided in an embodiment of the present application.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The technical solution of the embodiment of the application can be applied to various communication systems, for example: global system for mobile communications (Global System of Mobile communication, GSM), code division multiple access (Code Division Multiple Access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) systems, general packet radio service (General Packet Radio Service, GPRS), long term evolution (Long Term Evolution, LTE) systems, LTE frequency division duplex (Frequency Division Duplex, FDD) systems, LTE time division duplex (Time Division Duplex, TDD), universal mobile telecommunications system (Universal Mobile Telecommunication System, UMTS), worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access, wiMAX) communication systems, or 5G systems, and the like.

Exemplary, a communication system 100 to which embodiments of the present application apply is shown in fig. 1. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal 120 (or referred to as a communication terminal, terminal). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminals located within the coverage area. Alternatively, the network device 110 may 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 (Evolutional Node B, 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 may be a mobile switching center, a relay station, an access point, a vehicle device, a wearable device, a hub, a switch, a bridge, a router, a network-side device in a 5G network, or a network device in a future evolved public land mobile network (Public Land Mobile Network, PLMN), etc.

The communication system 100 further includes at least one terminal 120 located within the coverage area of the network device 110. "terminal" as used herein includes, but is not limited to, connection via wireline, such as via public-switched telephone network (Public Switched Telephone Networks, PSTN), digital subscriber line (Digital Subscriber Line, DSL), digital cable, direct cable connection; and/or another data connection/network; and/or via a wireless interface, e.g., for a cellular network, a wireless local area network (Wireless Local Area Network, WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter; and/or means of the other terminal arranged to receive/transmit communication signals; and/or internet of things (Internet of Things, ioT) devices. Terminals arranged to communicate over a wireless interface may be referred to as "wireless communication terminals", "wireless terminals" or "mobile terminals". Examples of mobile terminals include, but are not limited to, satellites or cellular telephones; a personal communications system (Personal Communications System, PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; a PDA that can include a radiotelephone, pager, internet/intranet access, web browser, organizer, calendar, and/or a global positioning system (Global Positioning System, GPS) receiver; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. A terminal may refer to 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 cordless telephone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA), 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, a terminal in a 5G network or a terminal in a future evolved PLMN, etc.

Alternatively, direct to Device (D2D) communication may be performed between the terminals 120.

Alternatively, the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.

Fig. 1 illustrates one network device and two terminals, alternatively, the communication system 100 may include multiple network devices and each network device may include other numbers of terminals within a coverage area, which is not limited in this embodiment.

Optionally, the communication system 100 may further include a network controller, a mobility management entity, and other network entities, which are not limited in this embodiment of the present application.

It should be understood that a device having a communication function in a network/system in an embodiment of the present application may be referred to as a communication device. Taking the communication system 100 shown in fig. 1 as an example, the communication device may include a network device 110 and a terminal 120 with communication functions, where the network device 110 and the terminal 120 may be specific devices described above, and are not described herein again; the communication device may also include other devices in the communication system 100, such as a network controller, a mobility management entity, and other network entities, which are not limited in this embodiment of the present application.

It should be understood that the terms "system" and "network" are used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In order to facilitate understanding of the technical solutions of the embodiments of the present application, the following describes related technologies of the embodiments of the present application.

The random access is an important process for establishing wireless connection between the UE and the network side, and uplink synchronization can be obtained between the UE and the base station through the random access, so as to apply for uplink resources. The random access procedure is classified into a contention-based random access procedure and a non-contention-based random access procedure. Wherein, the contention-based random access procedure includes a four-step random access procedure and a two-step random access procedure, and fig. 2 shows a flowchart of the four-step random access procedure, and as shown in fig. 2, the four-step random access procedure includes the steps of:

step 201: the UE sends msg1 to the base station.

Here, the UE transmitting msg1 to the base station may be specifically implemented by:

-the UE determining a relation (configured by higher layers) of synchronization signal blocks (Synchronization Signal Block, SSB) to physical random access channel (Physical Random Access Channel, PRACH) resources;

-the UE receives a set of SSBs and determines its reference signal received power (Reference Signal Received Power, RSRP) value, selecting the appropriate SSB according to a threshold;

-the UE determining PRACH resources based on the selected SSBs and the correspondence of SSBs to PRACH resources;

-the UE transmitting a preamble on PRACH time-frequency domain resources.

Step 202: the UE receives msg2 sent by the base station.

Here, the UE receiving msg2 transmitted by the base station may be specifically implemented by the following procedure:

after msg1 is sent, the UE starts a RAR window (RAR window) and listens to the PDCCH during the operation of the window, wherein the PDCCH is a PDCCH scrambled with RA-RNTI. The RA-RNTI is related to PRACH time-frequency resources selected by the UE, and is calculated as follows:

RA-RNTI＝1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id

wherein s_id is the index of the first OFDM symbol of PRACH resource (0 is less than or equal to s_id < 14);

t_id is the index of the first time slot of PRACH resource in the system frame (0 is less than or equal to t_id < 80);

f_id is an index of PRACH occasion in frequency domain (0.ltoreq.f_id < 8);

ul_carrier_id is an Uplink (UL) carrier for preamble index transmission.

After the UE successfully monitors the RA-RNTI scrambled PDCCH, it can acquire the physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) scheduled by the PDCCH, where the data format of the MAC PDU (Media Access Control Protocol Data Unit, MAC PDU) including msg2, msg2 is shown in fig. 3-1, and the MAC PDU includes a plurality of MAC sub-PDU (MAC subPDU), which are MAC sub-PDU 1, MAC sub-PDU 2, MAC sub-PDU 3, and so on. Wherein, the MAC sub PDU1 contains a back-off indication (Backoff Indication, BI), and the structure of the MAC sub PDU1 including E/T/R/R/BI sub-header is shown in FIG. 3-2. The MAC sub PDU2 contains a random access preamble identification (Random Access preamble ID, RAPID), and the MAC sub PDU2 includes an E/T/RAPID sub-header, and the structure of the E/T/RAPID sub-header is shown in FIGS. 3-3. The remaining MAC subPDU (e.g. MAC subPDU 3) contains RAPID and random access response (Random Access Response, RAR), taking MAC subPDU3 as an example, MAC subPDU3 includes E/T/RAPID subheader and MAC RAR, the structure of E/T/RAPID subheader is shown in FIG. 3-3, and the structure of MAC RAR is shown in FIG. 3-4. The description of the respective information in fig. 3-2 to 3-4 is as follows:

BI: and the back-off indication information is used for indicating the back-off time for retransmitting the first-step message.

RAPID: the network responds to the received preamble index.

R: representing a reserved bit region.

TAC: a time advance command (Timing Advance Command) for adjusting the upstream timing.

UL Grant: an Uplink Grant (Uplink Grant) is used to indicate the Uplink transmission Msg3 resource.

TC-RNTI: a Temporary cell RNTI (Temporary C-RNTI) for the terminal to subsequently scramble the transmitted Msg3 message.

Step 203: the UE sends msg3 to the base station.

msg3 is mainly used to send UE IDs to the network to resolve contention conflicts. For example, if it is an initial access random procedure, an RRC layer message, i.e., CCCH SDU, is carried in msg3, which contains a UE ID and a connection establishment request (rrcsetup request); in case of RRC reestablishment, a reestablishment request (RRCRestablishmentRequest) is carried.

Step 204: the UE receives msg4 sent by the base station.

msg4 has two roles, the first is for contention conflict resolution; the second is to transmit an RRC configuration message to the terminal. Whether or not to transmit the RRC configuration message depends on the trigger condition of the random access procedure and the scheduling policy at the network side, irrespective of the collision resolution itself. Here, the contention conflict resolution has two modes:

mode one: if the UE carries a Cell radio network temporary identity (Cell-Radio Network Temporary Identifier, C-RNTI) in msg3, msg4 is scheduled with the C-RNTI scrambled PDCCH. In other words, if the UE receives the C-RNTI-scrambled PDCCH and its corresponding PDSCH, the random access is completed.

Mode two: if the UE does not carry the C-RNTI in msg3, such as initial access, msg4 is scheduled with the TC-RNTI scrambled PDCCH; the collision is resolved by the UE receiving the PDSCH of msg4 by matching the CCCH SDU in the PDSCH.

In NR-U, the uplink transmission needs to execute LBT first, and only when LBT is successful, the uplink transmission can be executed. To reduce the impact of LBT on msg1 and msg3 transmissions, msg1 and msg3 may have multiple additional transmission opportunities on which the UE may perform LBT, respectively, and the UE may transmit msg1 or msg3 using one of the transmission opportunities for LBT success.

For msg3 transmission, there are two possible ways to increase msg3 transmission opportunities:

first way: whether the LBT is successfully executed or not by the UE, the UE starts ra-contentionResolutionTimer, and the purpose is to enable the UE to receive the retransmission scheduling of msg3 sent by the network to the UE, so that the transmission opportunity is improved;

second way: the UE is given a plurality of available msg3 transmission opportunities through RAR, or a plurality of msg3 retransmission opportunities are configured in the time domain, the UE performs LBT failure on all the msg3 transmission opportunities, and immediately resumes random access resource selection, and then sends msg1.

For the second approach, there is a problem in that the UE fails to perform LBT on all msg3 transmission opportunities, and when the UE reselects the transmission opportunity of msg1, it is possible that LBT still fails, which may result in reduced random access performance. Therefore, a manner of selecting msg1 resources needs to be considered, and the following technical solutions of the embodiments of the present application are proposed for this purpose.

Fig. 4 is a flow chart of a resource determining method according to an embodiment of the present application, as shown in fig. 4, where the resource determining method includes the following steps:

step 401: and the terminal executes LBT failure on the transmission resources of the first message or the second message, wherein the transmission resources of the first message or the second message are positioned in a first frequency domain range, and the terminal selects the transmission resources for retransmitting the first message in a second frequency domain range.

The technical scheme of the embodiment of the application is applied to a random access process, such as a four-step random access process shown in fig. 2. In one embodiment of the present application, the first message is msg1 and the second message is msg3.

In the embodiment of the present application, the transmission resource may also be referred to as a transmission opportunity. The transmission resource (or transmission opportunity) of msg1 refers to RO resource. The transmission resource (or transmission opportunity) of msg3 refers to an uplink resource scheduled by RAR or a preconfigured uplink resource, for example: the base station schedules transmission opportunities of a plurality of msg3 to the UE through RAR, or configures repeated transmission opportunities of the plurality of msg3 in the time domain. It should be noted that, the transmission resource of msg1 and the transmission resource of msg3 both belong to uplink transmission resources.

In this embodiment of the present application, after selecting a transmission resource for retransmitting the first message, the terminal executes LBT on an LBT subband where the transmission resource is located, and retransmits the first message through the transmission resource after the LBT is successful.

In the following, how to select the transmission resources of the first message will be described in connection with different examples, it should be noted that, in the following examples, BWP refers to uplink BWP, where a terminal may configure one or more uplink BWP on a current carrier, and one or more LBT subbands may be on the uplink BWP, where an LBT subband is a minimum unit where the terminal performs LBT on a frequency domain, and the terminal may independently perform LBT on multiple LBT subbands.

Alternative example one: an active upstream bandwidth Part (BWP) of the terminal is a first BWP, and the first BWP includes a plurality of LBT subbands; the terminal performs LBT failure on all transmission resources of a first message or a second message, where all transmission resources of the first message or the second message are located in a partial LBT subband of the first BWP, and selects a transmission resource for retransmitting the first message in an LBT subband of the first BWP other than the partial LBT subband.

The uplink BWP currently activated by the terminal (i.e. the first BWP) has a plurality of LBT subbands, each LBT subband being for example 20MHz. The terminal selects SSB, RO resources and a preamble before transmitting msg1. The RO resources may be configured on a plurality of LBT subbands of one uplink BWP, as shown in fig. 5, the uplink BWP currently activated by the terminal has 2 LBT subbands, namely LBT subband 1 and

LBT subband

2, and 4 RO resources are configured on each LBT subband. When the terminal selects the RO resource, it can randomly select one RO resource on each LBT sub-band, then execute LBT on the LBT sub-band where the selected RO resource is located, and the terminal selects the RO resource on the LBT sub-band where the LBT is successful to send msg1. If the LBT of each of the plurality of LBT sub-bands is successful, the terminal randomly selects RO resources on one LBT sub-band to transmit msg1. For example: referring to fig. 5, a terminal randomly selects RO6 resources on LBT subband 1, randomly selects RO1 resources on LBT subband 2, performs LBT for LBT subband 1 where RO6 resources are located and LBT subband 2 where RO1 resources are located, respectively, and if LBT is successfully performed on LBT subband 2, the terminal transmits msg1 through RO1 resources on LBT subband 2, and if LBT is successfully performed on both LBT subband 1 and LBT subband 2, the terminal randomly selects RO6 resources on LBT subband 1 to transmit msg1. In the above process, when the terminal selects the RO resource, it randomly selects one RO resource on each LBT subband, and in this embodiment, the terminal does not select the RO resource on each LBT subband, specifically:

● If msg1 has been transmitted for the random access procedure before the transmission of msg1, in the last transmission of msg3, the terminal performs LBT failure on all transmission resources of msg3, and all transmission resources of msg3 are scheduled on one LBT subband of the uplink BWP, the terminal does not select RO resources on this LBT subband when selecting RO resources of msg 1. For example: referring to fig. 5, if transmission resources of all msg3 are on the LBT subband 2 and the terminal performs LBT failure on the LBT subband 2 for transmission resources of all msg3, the terminal selects RO resources on the LBT subband 1.

● If msg1 has been transmitted for the random access procedure before the transmission of msg1, in the last transmission of msg3, the terminal performs LBT failure on all transmission resources of msg3, and all transmission resources of msg3 are scheduled on a plurality of LBT subbands of the uplink BWP (the plurality of LBT subbands are part of the LBT subbands of the uplink BWP), the terminal does not select RO resources on the LBT subbands when selecting RO resources of msg 1. For example: assuming that the uplink BWP currently activated by the terminal has 4 LBT subbands, if the transmission resources of msg3 are on LBT subband 2 and subband 3 and the terminal performs LBT failure on the transmission resources of all msg3 on LBT subband 2 and subband 3, the terminal selects RO resources on LBT subband 1 and LBT subband 4. If the transmission resources of msg3 are on

LBT subbands

1,2,3 and subband 4 and the terminal performs LBT failure on all the transmission resources of msg3 on

LBT subbands

1,2,3 and subband 4, the terminal may select another BWP or uplink carrier on which the transmission resources of msg1 are configured.

● If msg1 has been transmitted for the random access procedure before the transmission of msg1, in the last transmission of msg1, the terminal performs LBT failure on RO resources of all msg1 and RO resources of all msg1 are located on one LBT subband of the uplink BWP, the terminal does not select RO resources on this LBT subband when selecting RO resources of msg 1.

● If msg1 has been transmitted for the random access procedure before the transmission of msg1, in the last transmission of msg1, the terminal performs LBT failure on RO resources of all msg1 and RO resources of all msg1 are located on a plurality of LBT subbands of the uplink BWP (the plurality of LBT subbands are partial LBT subbands of the uplink BWP), the terminal does not select RO resources on the LBT subbands when selecting RO resources of msg 1.

Further, when selecting the RO resource, the terminal may consider the mapping relationship between the SSB and the RO resource, specifically:

● For the case where one SSB maps multiple RO resources: 1) The terminal selects an SSB meeting a threshold, and if a plurality of RO resources mapped by the SSB are distributed in different LBT sub-bands, the terminal can randomly select one RO on each LBT sub-band; or 2) the terminal selects a plurality of SSB meeting the threshold, and RO resources mapped by the SSB are distributed on different LBT sub-bands; the terminal randomly selects one RO from each SSB.

● For the case where multiple SSBs map one RO resource: the terminal selects a plurality of SSBs such that RO resources mapped by the selected SSBs are distributed over different LBT subbands, and the terminal can randomly select one RO resource on each LBT subband.

Alternative example two: the active uplink BWP of the terminal is a first BWP, and the first BWP includes one or more LBT subbands; the terminal performs LBT failure on all transmission resources of the first message or the second message, which are located in all LBT subbands of the first BWP, and selects transmission resources for retransmitting the first message on the second BWP. Here, the transmission resource of the first message is configured on the second BWP.

The uplink BWP currently activated by the terminal (i.e. the first BWP) has one or more LBT subbands, each of which is for example 20MHz. The terminal selects a plurality of uplink BWP before transmitting msg 1. The terminal may perform LBT on a plurality of uplink BWP, which configure RO resources, when selecting RO resources to transmit msg1, and select uplink BWP, which succeeds in LBT, to transmit msg 1. In this embodiment of the present application, when selecting RO resources, the terminal does not select RO resources on every uplink BWP, specifically:

● If msg1 has been transmitted for the random access procedure before the transmission of msg1 and in the last transmission of msg3, the terminal performs LBT failure on all the transmission resources of msg3 and all the transmission resources of msg3 are scheduled on one of the upstream BWPs, the terminal does not select RO resources on the upstream BWP when selecting RO resources of msg1. For example: referring to fig. 6, if transmission resources of all msg3 are on the currently activated uplink BWP1 and the terminal fails to perform LBT on transmission opportunities of all msg3 on the uplink BWP1, the terminal may switch to select RO resources of msg1 on another uplink BWP2 when retransmitting msg1, and if LBT is successful on the uplink BWP2, transmit msg1 through RO resources on the uplink BWP 2.

Alternative example three: the active uplink BWP of the terminal is a first BWP, and the first BWP includes one or more LBT subbands; the terminal performs LBT failure on all transmission resources of a first message or a second message, where all transmission resources of the first message or the second message are located in all LBT subbands of the first BWP, and the first BWP is located in a first carrier of a first serving cell, and then the terminal selects transmission resources for retransmitting the first message on a second carrier of the first serving cell. Here, the second carrier is configured with transmission resources of the first message.

The uplink BWP currently activated by the terminal (i.e. the first BWP) has one or more LBT subbands, each of which is for example 20MHz. The terminal selects a plurality of uplink carriers (e.g., a Supplementary Uplink (SUL) carrier, a Normal Uplink (NUL) carrier) before transmitting msg1. When selecting RO resources to transmit msg1, the terminal may perform LBT on a plurality of uplink carriers, and select uplink carriers for which LBT is successful to transmit msg1, where the uplink carriers configure RO resources. In this embodiment of the present application, when selecting RO resources, the terminal does not select RO resources on each uplink carrier, specifically:

● If msg1 has been transmitted for this random access procedure before the transmission of msg1 and in the last transmission of msg3 the terminal has performed LBT failure on all msg3 transmission resources and all msg3 transmission resources are scheduled on one of the uplink BWP located on the NUL carrier of the serving cell, i.e. the first carrier, the terminal does not select RO resources on the uplink BWP when selecting RO resources of msg1. For example: referring to fig. 7, if transmission resources of all msg3 are on the currently activated uplink BWP1 and the terminal fails to perform LBT on transmission opportunities of all msg3 on the uplink BWP1, the terminal may switch to RO resources of msg1 selected on the SUL carrier (i.e., the second carrier) of the same serving cell when retransmitting msg1, and if LBT is successful on the SUL carrier, msg1 is transmitted through RO resources on the SUL carrier.

Alternative example four: the active uplink BWP of the terminal is a first BWP, and the first BWP includes one or more LBT subbands; the terminal performs LBT failure on all transmission resources of a first message or a second message, where all transmission resources of the first message or the second message are located in all LBT subbands of the first BWP, and where the first BWP is located in a first serving cell, and the terminal selects transmission resources for retransmitting the first message on a second serving cell. Here, the BWP of the second serving cell is configured with transmission resources of the first message.

The uplink BWP currently activated by the terminal (i.e. the first BWP) has one or more LBT subbands, each of which is for example 20MHz. The terminal selects a plurality of uplink BWP or uplink carriers (e.g., supplementary Uplink (SUL) carrier, normal Uplink (NUL) carrier) before transmitting msg 1. When selecting RO resources to transmit msg1, the terminal may perform LBT on a plurality of uplink BWP or uplink carriers, which configure RO resources, and select uplink BWP or uplink carriers for which LBT is successful to transmit msg 1. In this embodiment of the present application, when selecting RO resources, the terminal does not select RO resources on each uplink BWP or uplink carrier, specifically:

● If msg1 has been transmitted for this random access procedure before the transmission of msg1 and in the last transmission of msg3 the terminal has performed LBT failure on all msg3 transmission resources and all msg3 transmission resources are scheduled on one of the uplink BWP, which is located in serving cell 1, the terminal does not select RO resources on msg1 when selecting those resources. For example: referring to fig. 8, if transmission resources of all msg3 are on the currently activated uplink BWP1 and the terminal fails to perform LBT on transmission opportunities of all msg3 on the uplink BWP1, the terminal may switch to an RO resource of another serving cell 2 to select msg1 when retransmitting msg1, and if LBT is successful on the serving cell 2, transmit msg1 through the RO resource on the serving cell 2.

Fig. 9 is a schematic structural diagram of a resource determining apparatus according to an embodiment of the present application, as shown in fig. 9, where the resource determining apparatus includes:

a resource selection unit 901, configured to select, if performing LBT on a transmission resource of a first message or a second message fails, the transmission resource of the first message or the second message being located in a first frequency domain range, the transmission resource for retransmitting the first message in a second frequency domain range.

In an embodiment, the active uplink BWP of the terminal is a first BWP, and the first BWP includes a plurality of LBT subbands;

the resource selection unit 901 is configured to select, if performing LBT failure on all transmission resources of a first message or a second message, where all transmission resources of the first message or the second message are located in a part of LBT subbands of the first BWP, a transmission resource for retransmitting the first message in LBT subbands other than the part of LBT subbands in the first BWP.

In an embodiment, the active uplink BWP of the terminal is a first BWP, and the first BWP includes one or more LBT subbands;

the resource selection unit 901 is configured to select a transmission resource for retransmitting the first message on the second BWP if the LBT failure is performed on all transmission resources of the first message or the second message, where all transmission resources of the first message or the second message are located in all LBT subbands of the first BWP.

In an embodiment, the second BWP is configured with transmission resources of the first message.

the resource selection unit 901 is configured to select, if performing LBT on all transmission resources of a first message or a second message fails, the transmission resources of the first message or the second message being located in all LBT subbands of the first BWP, the first BWP being located in a first carrier of a first serving cell, and select, on a second carrier of the first serving cell, a transmission resource for retransmitting the first message.

In an embodiment, the second carrier is configured with transmission resources of the first message.

the resource selection unit 901 is configured to select, if performing LBT on all transmission resources of a first message or a second message fails, the transmission resources of the first message or the second message being located in all LBT subbands of the first BWP, the first BWP being located in a first serving cell, the transmission resources for retransmitting the first message on a second serving cell.

In an embodiment, the BWP of the second serving cell is configured with transmission resources of the first message.

In one embodiment, the apparatus further comprises:

a transmission unit 902, configured to execute LBT on an LBT subband where the transmission resource is located after the resource selection unit selects a transmission resource for retransmitting the first message, and retransmit the first message through the transmission resource after the LBT is successful.

It should be understood by those skilled in the art that the above description of the resource determining device of the embodiments of the present application may be understood with reference to the description of the resource determining method of the embodiments of the present application.

Fig. 10 is a schematic structural diagram of a communication device 600 provided in an embodiment of the present application. The communication device may be a terminal and the communication device 600 shown in fig. 10 comprises a processor 610, and the processor 610 may call and run a computer program from a memory to implement the method in the embodiments of the present application.

Optionally, as shown in fig. 10, the communication device 600 may further comprise a memory 620. Wherein the processor 610 may call and run a computer program from the memory 620 to implement the methods in embodiments of the present application.

The memory 620 may be a separate device from the processor 610 or may be integrated into the processor 610.

Optionally, as shown in fig. 10, the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices, and in particular, may send information or data to other devices, or receive information or data sent by other devices.

The transceiver 630 may include a transmitter and a receiver, among others. Transceiver 630 may further include antennas, the number of which may be one or more.

Optionally, the communication device 600 may be specifically a network device in the embodiment of the present application, and the communication device 600 may implement a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the communication device 600 may be specifically a mobile terminal/terminal in the embodiment of the present application, and the communication device 600 may implement a corresponding flow implemented by the mobile terminal/terminal in each method in the embodiment of the present application, which is not described herein for brevity.

Fig. 11 is a schematic structural diagram of a chip of an embodiment of the present application. The chip 700 shown in fig. 11 includes a processor 710, and the processor 710 may call and run a computer program from a memory to implement the methods in the embodiments of the present application.

Optionally, as shown in fig. 11, chip 700 may also include memory 720. Wherein the processor 710 may call and run a computer program from the memory 720 to implement the methods in embodiments of the present application.

Wherein the memory 720 may be a separate device from the processor 710 or may be integrated into the processor 710.

Optionally, the chip 700 may also include an input interface 730. The processor 710 may control the input interface 730 to communicate with other devices or chips, and in particular, may obtain information or data sent by other devices or chips.

Optionally, the chip 700 may further include an output interface 740. The processor 710 may control the output interface 740 to communicate with other devices or chips, and in particular, may output information or data to other devices or chips.

Optionally, the chip may be applied to a network device in the embodiment of the present application, and the chip may implement a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the chip may be applied to a mobile terminal/terminal in the embodiments of the present application, and the chip may implement a corresponding flow implemented by the mobile terminal/terminal in each method in the embodiments of the present application, which is not described herein for brevity.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

Fig. 12 is a schematic block diagram of a communication system 900 provided in an embodiment of the present application. As shown in fig. 12, the communication system 900 includes a terminal 910 and a network device 920.

The terminal 910 may be configured to implement the corresponding functions implemented by the terminal in the above method, and the network device 920 may be configured to implement the corresponding functions implemented by the network device in the above method, which are not described herein for brevity.

It should be appreciated that the processor of an embodiment of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks 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 a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.

It will be appreciated that the memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile 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. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DR RAM). 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 above memory is exemplary but not limiting, and for example, the memory in the embodiments of the present application may be Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), direct RAM (DR RAM), and the like. That is, the memory in embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

Embodiments of the present application also provide a computer-readable storage medium for storing a computer program.

Optionally, the computer readable storage medium may be applied to a network device in the embodiments of the present application, and the computer program causes a computer to execute a corresponding flow implemented by the network device in each method in the embodiments of the present application, which is not described herein for brevity.

Optionally, the computer readable storage medium may be applied to a mobile terminal/terminal in the embodiments of the present application, and the computer program causes a computer to execute a corresponding procedure implemented by the mobile terminal/terminal in each method of the embodiments of the present application, which is not described herein for brevity.

Embodiments of the present application also provide a computer program product comprising computer program instructions.

Optionally, the computer program product may be applied to a network device in the embodiments of the present application, and the computer program instructions cause the computer to execute corresponding flows implemented by the network device in the methods in the embodiments of the present application, which are not described herein for brevity.

Optionally, the computer program product may be applied to a mobile terminal/terminal in the embodiments of the present application, and the computer program instructions cause the computer to execute corresponding processes implemented by the mobile terminal/terminal in the methods in the embodiments of the present application, which are not described herein for brevity.

The embodiment of the application also provides a computer program.

Optionally, the computer program may be applied to a network device in the embodiments of the present application, and when the computer program runs on a computer, the computer is caused to execute a corresponding flow implemented by the network device in each method in the embodiments of the present application, which is not described herein for brevity.

Optionally, the computer program may be applied to a mobile terminal/terminal in the embodiments of the present application, where the computer program when run on a computer causes the computer to execute corresponding processes implemented by the mobile terminal/terminal in the methods in the embodiments of the present application, and for brevity, will not be described in detail herein.

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 solution. 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 will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown 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 may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in 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 may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely 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 think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to 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 resource determination, the method comprising:

the terminal fails to execute LBT on the transmission resource of the second message, wherein the transmission resource of the second message is positioned in the first frequency domain range, and the terminal selects the transmission resource for retransmitting the first message in the second frequency domain range; the second message is msg3 in the random access process, and the first message is msg1 in the random access process.

2. The method of claim 1, wherein the active uplink BWP of the terminal is a first BWP, the first BWP comprising a plurality of LBT subbands;

the terminal performing LBT failure on a transmission resource of a second message, where the transmission resource of the second message is located in a first frequency domain range, and selecting, by the terminal, to retransmit the transmission resource of the first message in the second frequency domain range, including:

The terminal performs LBT failure on all transmission resources of a second message located in a partial LBT subband of the first BWP, and selects transmission resources for retransmitting the first message in LBT subbands other than the partial LBT subband in the first BWP.

3. The method of claim 1, wherein the active uplink BWP of the terminal is a first BWP, the first BWP comprising one or more LBT subbands;

the terminal performs LBT failure on all transmission resources of the second message, which are located in all LBT subbands of the first BWP, and selects transmission resources on the second BWP to retransmit the first message.

4. A method according to claim 3, wherein the second BWP is configured with transmission resources of the first message.

5. The method of claim 1, wherein the active uplink BWP of the terminal is a first BWP, the first BWP comprising one or more LBT subbands;

the terminal performs LBT failure on all transmission resources of a second message, where all transmission resources of the second message are located in all LBT subbands of the first BWP, where the first BWP is located on a first carrier of a first serving cell, and selects a transmission resource on a second carrier of the first serving cell for retransmitting the first message.

6. The method of claim 5, wherein the second carrier has transmission resources of the first message configured thereon.

7. The method of claim 1, wherein the active uplink BWP of the terminal is a first BWP, the first BWP comprising one or more LBT subbands;

the terminal performs LBT failure on all transmission resources of a second message, where all transmission resources of the second message are located in all LBT subbands of the first BWP, where the first BWP is located in a first serving cell, and selects a transmission resource on the second serving cell for retransmitting the first message.

8. The method of claim 7, wherein the transmission resources of the first message are configured on the BWP of the second serving cell.

9. The method of any one of claims 1 to 8, wherein the method further comprises:

and after the terminal selects the transmission resource for retransmitting the first message, executing LBT on the LBT sub-band where the transmission resource is located, and retransmitting the first message through the transmission resource after the LBT is successful.

10. A resource determining apparatus applied to a terminal, the apparatus comprising:

a resource selection unit, configured to select, if performing LBT on a transmission resource of a second message fails, the transmission resource of the second message being located in a first frequency domain range, the transmission resource for retransmitting the first message in the second frequency domain range; the second message is msg3 in the random access process, and the first message is msg1 in the random access process.

11. The apparatus of claim 10, wherein the active uplink BWP of the terminal is a first BWP, the first BWP comprising a plurality of LBT subbands;

the resource selection unit is configured to select, if performing LBT on all transmission resources of a second message fails, a transmission resource for retransmitting the first message in an LBT subband except for a portion of the LBT subbands in the first BWP if all transmission resources of the second message are located in the portion of the LBT subbands in the first BWP.

12. The apparatus of claim 10, wherein the active uplink BWP of the terminal is a first BWP, the first BWP comprising one or more LBT subbands;

the resource selection unit is configured to select, if performing LBT on all transmission resources of a second message fails, a transmission resource for retransmitting the first message on a second BWP if all transmission resources of the second message are located in all LBT subbands of the first BWP.

13. The apparatus of claim 12, wherein the second BWP is configured with transmission resources of the first message.

14. The apparatus of claim 10, wherein the active uplink BWP of the terminal is a first BWP, the first BWP comprising one or more LBT subbands;

the resource selection unit is configured to select, if performing LBT on all transmission resources of a second message fails, the transmission resources of the second message being located in all LBT subbands of the first BWP, the first BWP being located in a first carrier of a first serving cell, and select, on a second carrier of the first serving cell, a transmission resource for retransmitting the first message.

15. The apparatus of claim 14, wherein the second carrier has transmission resources of the first message configured thereon.

16. The apparatus of claim 10, wherein the active uplink BWP of the terminal is a first BWP, the first BWP comprising one or more LBT subbands;

the resource selection unit is configured to select, if performing LBT on all transmission resources of the second message fails, the transmission resources of the second message are located in all LBT subbands of the first BWP, and the first BWP is located in the first serving cell, and select, on the second serving cell, a transmission resource for retransmitting the first message.

17. The apparatus of claim 16, wherein the transmission resources of the first message are configured on a BWP of the second serving cell.

18. The apparatus according to any one of claims 10 to 17, wherein the apparatus further comprises:

and the transmission unit is used for executing LBT on the LBT sub-band where the transmission resource is located after the resource selection unit selects the transmission resource for retransmitting the first message, and retransmitting the first message through the transmission resource after the LBT is successful.

19. A terminal, comprising: a processor and a memory for storing a computer program, the processor being adapted to invoke and run the computer program stored in the memory for performing the method according to any of claims 1 to 9.

20. A chip, comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method of any one of claims 1 to 9.

21. A computer readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 1 to 9.