BWP conversion methods, devices, terminals, and network-side equipment

Abstract

This invention provides a method, apparatus, terminal, and network-side device for BWP conversion. The method includes: converting to a first BWP indicated by the BWP conversion identifier according to a BWP conversion identifier included in a target message during random access; or, after determining that random access has failed, converting to a second BWP; the second BWP is: an initial BWP, or a BWP with signal quality greater than a first threshold, or a BWP with subcarrier spacing greater than a second threshold. This invention solves the problem of how a terminal performs BWP conversion during random access.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication technology, in particular to a BWP conversion method and device, terminal and network side equipment. BACKGROUND

[0002] Small Data Transmission (SDT) refers to when a terminal is in an IDLE state or an inactive state, when the data volume is less than a certain threshold, or the number of data packets is less than a certain data volume, the terminal can maintain in the IDLE or inactive state to perform data transmission without entering the connected state. Thus, signaling overhead, terminal power consumption, and data transmission latency are reduced.

[0003] When a terminal performs SDT transmission, in order to meet the demand of a large number of SDT users, the network side will configure a separate BandWidth Part (BWP) for the terminal performing SDT, which can be referred to as SDT BWP. When the SDT terminal needs to perform data transmission, it can perform SDT transmission by switching to the SDT BWP. However, if the terminal fails to perform SDT transmission on the SDT BWP, or the network side finds that there are many terminals on the SDT BWP, how the terminal operates, there is no solution in the prior art. SUMMARY

[0004] The purpose of the present application is to provide a BWP conversion method and device, terminal and network side equipment to solve the problem that the prior art cannot realize BWP conversion in the random access process.

[0005] To solve the above problems, the present application provides a bandwidth part BWP conversion method, which is executed by a terminal, and the method comprises:

[0006] According to the BWP conversion identifier included in the target message in the random access process, switching to the first BWP indicated by the BWP conversion identifier;

[0007] Or,

[0008] After determining that the random access fails, switching to a second BWP; the second BWP is: an initial BWP, or a BWP with signal quality greater than a first threshold, or a BWP with a subcarrier spacing greater than a second threshold.

[0009] Among them, the target message includes any one of the following:

[0010] A random access response message of a four-step random access;

[0011] A downlink control information for scheduling a random access response of a four-step random access;

[0012] a contention resolution message of the four-step random access;

[0013] a message B of the two-step random access.

[0014] The method further comprises any one of the following:

[0015] a random access response (RAR) window of the four-step random access times out, determining that the random access fails;

[0016] a contention window of the four-step random access times out, determining that the random access fails;

[0017] no contention resolution signaling corresponding to the terminal is received within a contention window of the four-step random access, determining that the random access fails;

[0018] decoding fails within the contention window of the four-step random access;

[0019] a message B window of the two-step random access times out, determining that the random access fails.

[0020] After the terminal switches to the first BWP, the method further comprises:

[0021] continuing to send first data on the first BWP;

[0022] or

[0023] reinitiating a random access procedure on the first BWP;

[0024] or

[0025] reinitiating a random access procedure on a beam on the first BWP with a channel quality higher than a third threshold.

[0026] The continuing to send first data on the first BWP comprises:

[0027] sending a message 3 of the four-step random access on the first BWP, the message 3 comprising the first data;

[0028] or

[0029] sending a message A of the two-step random access on the first BWP, the message A comprising the first data.

[0030] After the terminal switches to the second BWP, the method further comprises:

[0031] reinitiating a random access procedure on the second BWP;

[0032] or

[0033] Reinitiate the random access procedure on a beam on the second BWP with a channel quality higher than a third threshold.

[0034] The embodiment of the application further provides a bandwidth part (BWP) conversion method, which is executed by a network side device, and the method comprises the following steps:

[0035] sending a target message in the random access procedure; the target message comprises a BWP conversion identifier;

[0036] The BWP conversion identifier is used for indicating that the terminal converts to a first BWP.

[0037] The target message comprises any one of the following:

[0038] a random access response message of the four-step random access;

[0039] downlink control information used for scheduling a random access response of the four-step random access;

[0040] a contention resolution message of the four-step random access;

[0041] a message B of the two-step random access.

[0042] The embodiment of the application further provides a terminal, which comprises a memory, a transceiver and a processor.

[0043] The memory is used for storing a computer program; the transceiver is used for transceiving data under the control of the processor; and the processor is used for reading the computer program in the memory and performing the following operations:

[0044] converting to a first BWP indicated by a BWP conversion identifier comprised in a target message in the random access procedure according to the BWP conversion identifier;

[0045] or

[0046] converting to a second BWP after determining that the random access fails; the second BWP is an initial BWP, or a BWP with a signal quality greater than a first threshold, or a BWP with a subcarrier spacing greater than a second threshold.

[0047] The target message comprises any one of the following:

[0048] a random access response message of the four-step random access;

[0049] downlink control information used for scheduling a random access response of the four-step random access;

[0050] a contention resolution message of the four-step random access;

[0051] a message B of the two-step random access.

[0052] The processor is further configured to read a computer program in the memory and perform the following operations:

[0053] A random access response (RAR) window of the four-step random access is timed out, and it is determined that the random access fails;

[0054] A contention window of the four-step random access is timed out, and it is determined that the random access fails;

[0055] Within the contention window of the four-step random access, a contention resolution signaling corresponding to the terminal is not received, and it is determined that the random access fails;

[0056] Within the contention window of the four-step random access, decoding fails;

[0057] A message B window of the two-step random access is timed out, and it is determined that the random access fails.

[0058] The processor is further configured to read a computer program in the memory and perform the following operations:

[0059] Continue to send first data on the first BWP;

[0060] Or,

[0061] Re-initiate a random access procedure on the first BWP;

[0062] Or,

[0063] Re-initiate a random access procedure on a beam with a channel quality higher than a third threshold on the first BWP.

[0064] The processor is further configured to read a computer program in the memory and perform the following operations:

[0065] Send a message 3 of the four-step random access on the first BWP, and the message 3 includes the first data;

[0066] Or,

[0067] Send a message A of the two-step random access on the first BWP, and the message A includes the first data.

[0068] The processor is further configured to read a computer program in the memory and perform the following operations:

[0069] Re-initiate a random access procedure on the second BWP;

[0070] Or,

[0071] Re-initiate a random access procedure on a beam with a channel quality higher than a third threshold on the second BWP.

[0072] The embodiment of the present application also provides a BWP conversion device applied to a terminal, comprising:

[0073] a conversion unit, configured to convert to a first BWP indicated by a BWP conversion identifier included in a target message in a random access process according to the BWP conversion identifier;

[0074] or, convert to a second BWP after determining that the random access fails; the second BWP is: an initial BWP, or a BWP with signal quality greater than a first threshold, or a BWP with a subcarrier spacing greater than a second threshold.

[0075] The embodiment of the present application also provides a network side device, comprising a memory, a transceiver and a processor;

[0076] the memory is configured to store a computer program; the transceiver is configured to transceive data under the control of the processor; and the processor is configured to read the computer program in the memory and perform the following operations:

[0077] send a target message in a random access process; the target message comprises a BWP conversion identifier;

[0078] the BWP conversion identifier is used to instruct a terminal to convert to a first BWP.

[0079] The target message comprises any one of the following:

[0080] a random access response message of a four-step random access;

[0081] a downlink control information used to schedule a random access response of a four-step random access;

[0082] a contention resolution message of a four-step random access;

[0083] a message B of a two-step random access.

[0084] The embodiment of the present application also provides a BWP conversion device applied to a network side device, comprising:

[0085] a sending unit, configured to send a target message in a random access process; the target message comprises a BWP conversion identifier;

[0086] the BWP conversion identifier is used to instruct a terminal to convert to a first BWP.

[0087] The embodiment of the present application also provides a processor readable storage medium, characterized in that the processor readable storage medium stores a computer program, and the computer program is used to make the processor execute the method as described above.

[0088] The above technical solutions of the present application have at least the following beneficial effects:

[0089] In the BWP conversion method, device, terminal and network side equipment of the embodiment of the present application, the terminal performs BWP conversion after receiving the BWP conversion identifier indicated in the target message of the network side equipment in the random access process, or the terminal performs BWP conversion after determining that the random access fails, thereby solving the problem of how the terminal performs BWP conversion in the random access process. BRIEF DESCRIPTION OF DRAWINGS

[0090] Figure 1 A block diagram of a wireless communication system to which the embodiment of the present application can be applied is shown;

[0091] Figure 2 One of the step schematic diagrams of the BWP conversion method provided by the embodiment of the present application is shown;

[0092] Figure 3 The second step schematic diagram of the BWP conversion method provided by the embodiment of the present application is shown;

[0093] Figure 4 One of the format schematic diagrams of RAR in the BWP conversion method provided by the embodiment of the present application is shown;

[0094] Figure 5 The second format schematic diagram of RAR in the BWP conversion method provided by the embodiment of the present application is shown;

[0095] Figure 6 The third format schematic diagram of RAR in the BWP conversion method provided by the embodiment of the present application is shown;

[0096] Figure 7 The format schematic diagram of message 4 in the BWP conversion method provided by the embodiment of the present application is shown;

[0097] Figure 8 The structure schematic diagram of the terminal provided by the embodiment of the present application is shown;

[0098] Figure 9 One of the structure schematic diagrams of the BWP conversion device provided by the embodiment of the present application is shown;

[0099] Figure 10 The structure schematic diagram of the network side equipment provided by the embodiment of the present application is shown;

[0100] Figure 11 The second structure schematic diagram of the BWP conversion device provided by the embodiment of the present application is shown. DETAILED DESCRIPTION

[0101] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0102] Figure 1 This diagram illustrates a block diagram of a wireless communication system applicable to an embodiment of the present invention. The wireless communication system includes a terminal device 11 and a network-side device 12. The terminal device 11 can also be referred to as a terminal or a user equipment (UE). It should be noted that the specific type of terminal 11 is not limited in this embodiment. The network-side device 12 can be a base station or a core network. It should be noted that this embodiment uses a base station in an NR system as an example, but the specific type of base station is not limited.

[0103] In this embodiment of the invention, the term "and / or" describes the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0104] In the embodiments of this application, the term "multiple" refers to two or more, and other quantifiers are similar.

[0105] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0106] This application provides a BWP conversion method and apparatus for implementing BWP conversion during random access.

[0107] The method and apparatus are based on the same concept of the application. Since the methods and apparatus solve problems in similar ways, the implementation of the apparatus and methods can refer to each other, and the repeated parts will not be described again.

[0108] The technical solutions provided in this application can be applied to various systems, especially 5G systems. For example, applicable systems include Global System for Mobile Communication (GSM), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS), Long Term Evolution (LTE), LTE Frequency Division Duplex (FDD), LTE Time Division Duplex (TDD), Long Term Evolution Advanced (LTE-A), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX), and 5G New Radio (NR). All of these systems include terminal equipment and network equipment. The systems may also include a core network component, such as Evolved Packet System (EPS) and 5G system (5GS).

[0109] The terminal devices involved in the embodiments of this application can be devices that provide voice and / or data connectivity to users, handheld devices with wireless connectivity, or other processing devices connected to a wireless modem. The names of the terminal devices may differ in different systems; for example, in a 5G system, a terminal device can be called User Equipment (UE). Wireless terminal devices can communicate with one or more core networks (CNs) via a Radio Access Network (RAN). Wireless terminal devices can be mobile terminal devices, such as mobile phones (or "cellular" phones) and computers with mobile terminal devices, for example, portable, pocket-sized, handheld, computer-embedded, or vehicle-mounted mobile devices that exchange voice and / or data with the RAN. Examples include Personal Communication Service (PCS) phones, cordless phones, Session Initiated Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). Wireless terminal equipment can also be referred to as a system, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point, remote terminal, access terminal, user terminal, user agent, or user device, but is not limited to these terms in the embodiments of this application.

[0110] The network device involved in this application embodiment can be a base station, which may include multiple cells providing services to terminals. Depending on the specific application, a base station may also be called an access point, or a device in an access network that communicates with a wireless terminal device through one or more sectors on the air interface, or other names. The network device can be used to exchange received air frames with Internet Protocol (IP) packets, acting as a router between the wireless terminal device and the rest of the access network, where the rest of the access network may include an Internet Protocol (IP) communication network. The network device can also coordinate the attribute management of the air interface. For example, the network equipment involved in the embodiments of this application can be a base transceiver station (BTS) in a Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA), a NodeB in a Wide-band Code Division Multiple Access (WCDMA) system, an evolved Node B (eNB or e-NodeB) in a long term evolution (LTE) system, a 5G base station (gNB) in a next generation system, a Home evolved Node B (HeNB), a relay node, a femto, a pico, etc., and is not limited in the embodiments of this application. In some network structures, the network equipment may include centralized unit (CU) nodes and distributed unit (DU) nodes, and the centralized unit and distributed unit may be geographically separated.

[0111] Network devices and terminal devices can each use one or more antennas for multiple-input multiple-output (MIMO) transmission. MIMO transmission can be single-user MIMO (SU-MIMO) or multiple-user MIMO (MU-MIMO). Depending on the configuration and number of antenna combinations, MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, and can also be diversity transmission, precoding transmission, or beamforming transmission, etc.

[0112] like Figure 2 As shown, this embodiment of the invention provides a method for converting the bandwidth portion (BWP), which is executed by a terminal. The method includes:

[0113] Step 201: Based on the BWP transition identifier included in the target message during the random access process, switch to the first BWP indicated by the BWP transition identifier;

[0114] or,

[0115] After determining that random access has failed, the system switches to the second BWP; the second BWP is: the initial BWP, or a BWP with signal quality greater than the first threshold, or a BWP with subcarrier spacing greater than the second threshold.

[0116] Optionally, the BWP conversion identifier is the ID of the first BWP.

[0117] In this embodiment of the invention, the terminal performs BWP conversion upon receiving the BWP conversion identifier indicated in the target message of the network-side device during the random access process, or the terminal performs BWP conversion after determining that the random access has failed; thus solving the problem of how the terminal performs BWP conversion during the random access process.

[0118] It should be noted that contention-based random access procedures are divided into two types: four-step random access and two-step random access. Two-step random access is introduced to save random access latency.

[0119] The four-step random access process includes four steps: the terminal sends MSG1 (i.e., preamble), the terminal receives MSG2 (i.e., random access response RAR), the terminal sends MSG3 (the uplink grant of MSG3 is sent via RAR), and the terminal receives MSG4 (i.e., contention resolution message).

[0120] Two-step random access combines MSG1 and MSG3 into MSG A for transmission and then begins receiving MSG B. MSG B can have the following variations:

[0121] successRAR indicates that MSGA was successfully received;

[0122] FallbackRAR indicates that the terminal needs to fall back to the four-step random access.

[0123] As an optional embodiment, the target message includes any one of the following:

[0124] The random access response message for four-step random access (also known as MSG 2 or message 2);

[0125] Downlink control information used for scheduling the random access response of the four-step random access;

[0126] The contention resolution message for four-step random access (also known as MSG 4 or message 4);

[0127] The two-step random access message B (i.e., MSG B).

[0128] As another optional embodiment, the method further includes any one of the following:

[0129] The random access response RAR window timed out in the four-step random access process, indicating that the random access failed.

[0130] The contention window for four-step random access timed out, indicating that the random access failed.

[0131] If no contention resolution signaling corresponding to the terminal is received within the contention window of the four-step random access, the random access is determined to have failed.

[0132] Decoding failed within the contention window of the four-step random access;

[0133] The message window B for the two-step random access process timed out, confirming that the random access failed.

[0134] Following the previous example, in at least one embodiment of the present invention, after the terminal switches to the first BWP, the method further includes:

[0135] Continue sending the first data on the first BWP; for example, if the available resources on the first BWP are sufficient to carry the remaining first data, continue sending the first data on the first BWP. Optionally, the first data is MDT data.

[0136] or,

[0137] Re-initiate the random access procedure on the first BWP;

[0138] or,

[0139] The random access procedure is re-initiated on the beam where the channel quality on the first BWP is higher than the third threshold.

[0140] The step of continuing to send the first data on the first BWP includes:

[0141] Send message 3, which includes the first data, on the first BWP. For example, if message 2, DCI, or message B (which is fallbackRAR) carries a BWP conversion identifier, then the first data can continue to be sent in message 3.

[0142] or,

[0143] Send a two-step random access message A on the first BWP, the message A including the first data; for example, if message B (this message B is fallbackRAR) carries a BWP conversion identifier, then it can fall back to message 3 to continue sending the first data.

[0144] As another optional embodiment, after the terminal switches to the second BWP, the method further includes:

[0145] Re-initiate the random access procedure on the second BWP;

[0146] or,

[0147] The random access procedure is re-initiated on the beam where the channel quality on the second BWP is higher than the third threshold.

[0148] It should be noted that the first threshold, second threshold and / or third threshold mentioned in the embodiments of the present invention can be configured by the network-side device or preset, and no specific limitation is made here.

[0149] Example 1: After the RAR window times out in the four-step random access process, perform BWP conversion.

[0150] Step 1: Configure SDT parameters on the network side; the network side notifies the SDT parameters via broadcast messages or dedicated messages, such as RRC release messages. SDT parameters include one or more of the following:

[0151] The location of randomly accessed resources;

[0152] Preamble information;

[0153] The configuration location of the SDT BWP, such as the BWP ID, whether initial access can be performed on the SDT BWP, the PUCCH (Physical Uplink Control Channel) information, PUSCH (Physical Uplink Shared Channel) information, and configuration authorization information on the BWP;

[0154] The first signal threshold value for the terminal (UE) to perform SDT transmission; the signal can be RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality), RSSI (Received Signal Strength Indication), or SINR (Signal to Interference plus Noise Ratio, which is not limited here).

[0155] The terminal selects the second signal threshold information for SDT BWP to execute SDT; the signal can be RSRP, RSRQ, RSSI, SINR, and there are no restrictions here.

[0156] Step 2: After the terminal determines that the SDT transmission conditions are met, it executes the SDT transmission.

[0157] When small amounts of data arrive and the conditions for performing SDT transmission on the SDT BWP are met, such as when the data is higher than the second signal threshold configured in step one, the UE selects to perform SDT on the SDT BWP.

[0158] Step 3: The UE selects the preamble and executes the preamble transmission;

[0159] Step 4: The UE opens the RAR receive window, and the UE performs RAR reception during the RAR window operation.

[0160] Step 5: If the UE still has not received its own RAR after the RAR window times out, the UE performs a BWP transition:

[0161] The UE can switch to the initial BWP; or,

[0162] The UE switches to a BWP with better signal quality; or,

[0163] The UE switches to a BWP with a larger SCS.

[0164] The UE re-executes the random access procedure (i.e., initiates a new SDT access procedure) on the converted BWP; or, the UE selects a beam with channel quality higher than a certain threshold on the converted BWP to execute the random access procedure.

[0165] Example 2: After the contention window of the four-step random access expires, BWP conversion is performed.

[0166] Step 1: After the terminal determines that the SDT transmission conditions are met, it executes the SDT transmission.

[0167] When small amounts of data arrive and the conditions for performing SDT transmission on the SDT BWP are met, such as being higher than the second signal threshold configured by the network, the UE selects to perform SDT on the SDT BWP.

[0168] Step 2: The UE selects the preamble and executes the preamble transmission;

[0169] Step 3: The UE opens the RAR receive window, and the UE performs RAR reception during the RAR window operation.

[0170] Step 4: The UE receives the RAR;

[0171] Step 5: The UE sends MSG 3 and opens a random access contention window;

[0172] Step Six: When contention resolution fails, the UE performs a BWP transition:

[0173] The UE can switch to the initial BWP; or,

[0174] The UE switches to a BWP with better signal quality; or,

[0175] The UE switches to a BWP with a larger SCS.

[0176] The UE re-executes the random access procedure (i.e., initiates a new SDT access procedure) on the converted BWP; or, the UE selects a beam with channel quality higher than a certain threshold on the converted BWP to execute the random access procedure.

[0177] Contention resolution failures include: receiving a message that does not correspond to the UE within the contention window, failing to receive the corresponding message from the UE after the contention window times out, or UE decoding failure within a randomly accessed contention window.

[0178] Example 3: After the message window B times out in the two-step random access process, BWP conversion is performed.

[0179] Step 1: After the UE determines that the SDT transmission conditions are met, it performs SDT transmission;

[0180] When a small amount of data arrives and the conditions for performing SDT transmission on the SDT BWP are met, such as exceeding the second signal threshold configured by the network, the UE selects to perform SDT on the SDT BWP. The UE performs a two-step random access and a four-step random access selection procedure and determines to perform two-step random access.

[0181] Step 2: The UE selects the preamble and performs MSGA transmission, whereby the MSGA includes the preamble and PUSCH portions. The PUSCH content may include RRC signaling and / or SDT data.

[0182] Step 3: The UE opens the MSGB receive window, and the UE performs MSGB reception during the MSGB window operation.

[0183] Step 4: When the MSGB window times out and the UE does not receive its own RAR, the UE performs a BWP transition:

[0184] The UE can switch to the initial BWP; or,

[0185] The UE switches to a BWP with better signal quality; or,

[0186] The UE switches to a BWP with a larger SCS.

[0187] The UE re-executes the random access procedure (i.e., initiates a new SDT access procedure) on the converted BWP; or, the UE selects a beam with channel quality higher than a certain threshold on the converted BWP to execute the random access procedure.

[0188] In summary, in this embodiment of the invention, the terminal performs BWP conversion upon receiving the BWP conversion identifier indicated in the target message from the network-side device during the random access process, or the terminal performs BWP conversion after determining that the random access has failed; thus solving the problem of how the terminal performs BWP conversion during the random access process.

[0189] like Figure 3 As shown, this embodiment of the invention also provides a method for converting the bandwidth portion (BWP), which is executed by a network-side device. The method includes:

[0190] Step 301: Send a target message during the random access process; the target message includes a BWP transition identifier; wherein the BWP transition identifier is used to indicate that the terminal transitions to the first BWP.

[0191] Optionally, the BWP conversion identifier is the ID of the first BWP.

[0192] As an optional embodiment, the target message includes any one of the following:

[0193] The random access response message for four-step random access (also known as MSG2 or message 2);

[0194] Downlink control information used for scheduling the random access response of the four-step random access;

[0195] The contention resolution message for four-step random access (also known as MSG4 or message 4);

[0196] The two-step random access message B (i.e., MSG B).

[0197] Example 4, RAR or DCI in four-step random access includes BWP conversion identifier.

[0198] Step 1: Configure SDT parameters on the network side; the network side notifies the SDT parameters via broadcast messages or dedicated messages, such as RRC release messages or broadcast messages. SDT parameters include one or more of the following:

[0199] The location of randomly accessed resources;

[0200] Preamble information;

[0201] The configuration location of the SDT BWP, such as the BWP ID, whether initial access can be performed on this SDT BWP, PUCCH information, PUSCH information, configuration authorization information, etc. on this BWP;

[0202] The first signal threshold value for the terminal (UE) to perform SDT transmission; the signal can be RSRP, RSRQ, RSSI, SINR, which is not restricted here.

[0203] The terminal selects the second signal threshold information for SDT BWP to execute SDT; the signal can be RSRP, RSRQ, RSSI, SINR, and there are no restrictions here.

[0204] Step 2: After the terminal determines that the SDT transmission conditions are met, it executes the SDT transmission.

[0205] When small amounts of data arrive and the conditions for performing SDT transmission on the SDT BWP are met, such as when the data is higher than the second signal threshold configured in step one, the UE selects to perform SDT on the SDT BWP.

[0206] Step 3: The UE selects the preamble and executes the preamble transmission;

[0207] Step 4: The UE opens the RAR receive window, and the UE performs RAR reception during the RAR window operation.

[0208] Step 5: When the UE receives a RAR for itself; if the RAR contains a BWP transition identifier, the UE performs a BWP transition and executes the following in the indicated BWP:

[0209] Continue sending MSG3, which contains SDT data;

[0210] Alternatively, the random access procedure can be re-executed (i.e., a new SDT access procedure can be initiated);

[0211] Alternatively, a random access procedure may be performed on a beam with channel quality above a certain threshold selected on the indicated BWP.

[0212] The BWP transition identifier can be added in the RAR file by adding a BWP ID, where the BWP ID is the first BWPID, i.e., the BWP ID to which the UE will transition. For example... Figure 4 The image shows the format of a BWP IE file in RAR.

[0213] Alternatively, a BWP ID can be added to DCI format 1_0. DCI format 1_0 is the DCI format for scheduling RAR, but the current DCI format does not support BWP conversion. Therefore, adding a BWP ID to the DCI format enables DCI format 1_0 to support BWP conversion.

[0214] When there is no BWP transition identifier in the RAR, the UE continues to send MSG3 on the SDT BWP. MSG3 may contain SDT data and / or RRC signaling.

[0215] Step 6: UE receives MSG5;

[0216] Step 7: The UE terminates SDT transmission according to the network side's instructions.

[0217] Example 5: In two-step random access, MSGB includes the BWP transition identifier.

[0218] Step 1: After the UE determines that the SDT transmission conditions are met, it performs SDT transmission;

[0219] When a small amount of data arrives and the conditions for performing SDT transmission on the SDT BWP are met, such as exceeding the second signal threshold configured by the network, the UE selects to perform SDT on the SDT BWP. The UE performs a two-step random access and a four-step random access selection procedure and determines to perform two-step random access.

[0220] Step 2: The UE selects the preamble and performs MSGA transmission, whereby the MSGA includes the preamble and PUSCH portions. The PUSCH content may include RRC signaling and SDT data.

[0221] Step 3: The UE opens the MSGB receive window, and the UE performs MSGB reception during the MSGB window operation.

[0222] Step 4: When the UE receives an identifier containing a BWP transition for its own RAR, the UE performs the BWP transition and executes the following in the indicated BWP:

[0223] Continue sending MSG3, which contains SDT data;

[0224] Alternatively, the random access procedure can be re-executed (i.e., a new SDT access procedure can be initiated);

[0225] Alternatively, a random access procedure may be performed on a beam with channel quality above a certain threshold selected on the indicated BWP.

[0226] The RAR can be either a successRAR or a fallbackRAR.

[0227] The BWP transition identifier can be added by adding a BWPID in the successRAR or fallbackRAR, where the BWP ID is the first BWP ID, i.e., the BWP ID to which the UE will transition.

[0228] The successRAR contains a BWP ID in the following format: Figure 5 As shown, the format of the fallbackRAR containing the BWP ID is as follows: Figure 6 As shown.

[0229] If there is no BWP transition identifier in the RAR, the UE continues to perform the SDT procedure on the SDT BWP.

[0230] Step 5: The UE terminates the SDT transmission according to the network side's instructions.

[0231] Example 6: MSG4 in the four-step random access includes the BWP transition identifier.

[0232] Step 1: After the terminal determines that the SDT transmission conditions are met, it executes the SDT transmission.

[0233] When small amounts of data arrive and the conditions for performing SDT transmission on the SDT BWP are met, such as being higher than the second signal threshold configured by the network, the UE selects to perform SDT on the SDT BWP.

[0234] Step 2: The UE selects the preamble and executes the preamble transmission;

[0235] Step 3: The UE opens the RAR receive window, and the UE performs RAR reception during the RAR window operation.

[0236] Step 4: The UE receives its own RAR and performs MSG3 transmission;

[0237] Step 5: The UE receives MSG4. The network side instructs the UE to perform BWP transition in MSG4, and this instruction can be the first BWPID. Specifically, the format of the BWP ID in MSG4 can be as follows: Figure 7 As shown.

[0238] Step Six: The terminal continues to perform SDT transmission;

[0239] Step 7: The UE terminates SDT transmission according to the network side's instructions.

[0240] In this embodiment of the invention, the terminal performs BWP conversion upon receiving the BWP conversion identifier indicated in the target message of the network-side device during the random access process, or the terminal performs BWP conversion after determining that the random access has failed; thus solving the problem of how the terminal performs BWP conversion during the random access process.

[0241] like Figure 8 As shown, this embodiment of the invention also provides a terminal, including a memory 820, a transceiver 810, and a processor 800;

[0242] The memory 820 is used to store computer programs; the transceiver 810 is used to send and receive data under the control of the processor; the processor 800 is used to read the computer program in the memory 820 and perform the following operations:

[0243] Based on the BWP transition identifier included in the target message during the random access process, the user is switched to the first BWP indicated by the BWP transition identifier.

[0244] or,

[0245] After determining that random access has failed, the system switches to the second BWP; the second BWP is: the initial BWP, or a BWP with signal quality greater than the first threshold, or a BWP with subcarrier spacing greater than the second threshold.

[0246] As an optional embodiment, the target message includes any one of the following:

[0247] The random access response message for four-step random access;

[0248] Downlink control information used for scheduling the random access response of the four-step random access;

[0249] Four-step random access contention resolution message;

[0250] Message B, a two-step random access.

[0251] As an optional embodiment, the processor is also configured to read a computer program from the memory and perform the following operations:

[0252] The random access response RAR window timed out in the four-step random access process, indicating that the random access failed.

[0253] The contention window for four-step random access timed out, indicating that the random access failed.

[0254] If no contention resolution signaling corresponding to the terminal is received within the contention window of the four-step random access, the random access is determined to have failed.

[0255] Decoding failed within the contention window of the four-step random access;

[0256] The message window B for the two-step random access process timed out, confirming that the random access failed.

[0257] As an optional embodiment, the processor is also configured to read a computer program from the memory and perform the following operations:

[0258] Continue sending the first data on the first BWP;

[0259] or,

[0260] Re-initiate the random access procedure on the first BWP;

[0261] or,

[0262] The random access procedure is re-initiated on the beam where the channel quality on the first BWP is higher than the third threshold.

[0263] As an optional embodiment, the processor is also configured to read a computer program from the memory and perform the following operations:

[0264] Send a four-step random access message 3 on the first BWP, the message 3 including the first data;

[0265] or,

[0266] Send a two-step random access message A on the first BWP, wherein message A includes the first data.

[0267] As an optional embodiment, the processor is also configured to read a computer program from the memory and perform the following operations:

[0268] Re-initiate the random access procedure on the second BWP;

[0269] or,

[0270] The random access procedure is re-initiated on the beam where the channel quality on the second BWP is higher than the third threshold.

[0271] Among them, Figure 8 In this context, the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits of one or more processors represented by processor 800 and memory represented by memory 820 together. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. The transceiver 810 can be multiple components, including transmitters and receivers, providing a unit for communicating with various other devices over a transmission medium, including wireless channels, wired channels, optical fibers, etc. For different user equipment, the user interface 830 can also be an interface capable of connecting external or internal devices, including but not limited to keypads, displays, speakers, microphones, joysticks, etc.

[0272] The processor 800 is responsible for managing the bus architecture and general processing, while the memory 820 can store the data used by the processor 600 during operation.

[0273] Optionally, the processor 800 can be a CPU (Central Processing Unit), ASIC (Application Specific Integrated Circuit), FPGA (Field-Programmable Gate Array), or CPLD (Complex Programmable Logic Device), and the processor can also adopt a multi-core architecture.

[0274] The processor executes any of the methods described in the embodiments of this application according to the obtained executable instructions by calling a computer program stored in memory. The processor and memory may also be physically separated.

[0275] It should be noted that the terminal provided in this embodiment of the invention can implement all the method steps implemented in the above method embodiment and achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0276] like Figure 9 As shown, this embodiment of the invention also provides a BWP conversion device, applied to a terminal, comprising:

[0277] The conversion unit 901 is used to convert to the first BWP indicated by the BWP conversion identifier according to the BWP conversion identifier included in the target message during the random access process;

[0278] Alternatively, it can be used to switch to a second BWP after determining that random access has failed; the second BWP is: the initial BWP, or a BWP with signal quality greater than a first threshold, or a BWP with subcarrier spacing greater than a second threshold.

[0279] As an optional embodiment, the target message includes any one of the following:

[0280] The random access response message for four-step random access;

[0281] Downlink control information used for scheduling the random access response of the four-step random access;

[0282] Four-step random access contention resolution message;

[0283] Message B, a two-step random access.

[0284] As an optional embodiment, the device further includes any one of the following:

[0285] The first failure determination unit is used to determine random access failure when the random access response RAR window of the four-step random access expires.

[0286] The second failure determination unit is used to determine random access failure when the contention window of the four-step random access expires.

[0287] The third failure determination unit is used to determine that random access has failed if no contention resolution signaling corresponding to the terminal is received within the contention window of the four-step random access.

[0288] The fourth failure determination unit is used to determine that random access has failed when the message window B of the two-step random access expires.

[0289] As an optional embodiment, the apparatus further includes:

[0290] The first processing unit is configured to continue sending the first data on the first BWP;

[0291] Alternatively, it can be used to re-initiate the random access procedure on the first BWP;

[0292] Alternatively, it can be used to re-initiate a random access procedure on a beam where the channel quality on the first BWP is higher than a third threshold.

[0293] As an optional embodiment, the first processing unit is further configured to:

[0294] Send a four-step random access message 3 on the first BWP, the message 3 including the first data;

[0295] or,

[0296] Send a two-step random access message A on the first BWP, wherein message A includes the first data.

[0297] As an optional embodiment, the apparatus further includes:

[0298] The second processing unit is used to re-initiate the random access procedure on the second BWP;

[0299] Alternatively, it can be used to re-initiate a random access procedure on a beam where the channel quality on the second BWP is higher than the third threshold.

[0300] It should be noted that the apparatus provided in this embodiment of the invention can implement all the method steps implemented in the above method embodiment and can achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0301] like Figure 10 As shown, this embodiment of the invention also provides a network-side device, including a memory 120, a transceiver 110, and a processor 100;

[0302] Memory 120 is used to store computer programs; transceiver 110 is used to send and receive data under the control of the processor; processor 100 is used to read the computer programs in the memory and perform the following operations:

[0303] Send a target message during the random access process; the target message includes a BWP transition identifier;

[0304] The BWP conversion identifier is used to indicate that the terminal is switching to the first BWP.

[0305] As an optional embodiment, the target message includes any one of the following:

[0306] The random access response message for four-step random access;

[0307] Downlink control information used for scheduling the random access response of the four-step random access;

[0308] Four-step random access contention resolution message;

[0309] Message B, a two-step random access.

[0310] Among them, Figure 10In this context, the bus architecture may include any number of interconnected buses and bridges, specifically linking various circuits together, represented by one or more processors (processor 100) and memory (memory 120). The bus architecture may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. The transceiver 110 may be multiple elements, including transmitters and receivers, providing units for communicating with various other devices over transmission media, including wireless channels, wired channels, optical fibers, etc. Processor 100 is responsible for managing the bus architecture and general processing, and memory 120 may store data used by processor 100 during operation.

[0311] The processor 100 can be a central processing unit (CPU), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable logic device (CPLD). The processor can also adopt a multi-core architecture.

[0312] It should be noted that the network-side device provided in this embodiment of the invention can implement all the method steps implemented in the above method embodiment and achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0313] like Figure 11 As shown, this embodiment of the invention also provides a BWP conversion device, applied to a network-side device, comprising:

[0314] Sending unit 1101 is used to send a target message during the random access process; the target message includes a BWP transition identifier;

[0315] The BWP conversion identifier is used to indicate that the terminal is switching to the first BWP.

[0316] As an optional embodiment, the target message includes any one of the following:

[0317] The random access response message for four-step random access;

[0318] Downlink control information used for scheduling the random access response of the four-step random access;

[0319] Four-step random access contention resolution message;

[0320] Message B, a two-step random access.

[0321] It should be noted that the division of units in the embodiments of this application is illustrative and only represents one logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated units described above can be implemented in hardware or as software functional units.

[0322] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0323] It should be noted that the apparatus provided in this embodiment of the invention can implement all the method steps implemented in the above method embodiment and can achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0324] At least one embodiment of the present invention also provides a processor-readable storage medium storing a computer program for causing the processor to perform the method described above; the processor-readable storage medium may be any available medium or data storage device that the processor can access, including but not limited to magnetic memory (e.g., floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical memory (e.g., CD, DVD, BD, HVD, etc.), and semiconductor memory (e.g., ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)).

[0325] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0326] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0327] These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0328] These processors can execute instructions that can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable device for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0329] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A method for converting the bandwidth portion (BWP), executed by a terminal, characterized in that, The method comprises: transferring to a first BWP indicated by a BWP transfer identifier included in a target message in a random access procedure according to the BWP transfer identifier; reinitiating the random access procedure on the first BWP; or reinitiating the random access procedure on a beam on the first BWP with a channel quality higher than a third threshold.

2. The method of claim 1, wherein, The target message comprises any one of the following: a random access response message of four-step random access; downlink control information for scheduling a random access response of four-step random access; a contention resolution message of four-step random access; a message B of two-step random access.

3. The method of claim 1, wherein, The method further comprises any one of the following: a random access failure is determined when a random access response RAR window of four-step random access is timed out; a random access failure is determined when a contention window of four-step random access is timed out; a random access failure is determined when no contention resolution signaling corresponding to the terminal is received within the contention window of four-step random access; a random access failure is determined when decoding fails within the contention window of four-step random access; a random access failure is determined when a message B window of two-step random access is timed out.

4. A terminal, characterized by comprising: comprise a memory, a transceiver, and a processor; the memory is configured to store a computer program; the transceiver is configured to transceive data under control of the processor; and the processor is configured to read the computer program in the memory and perform the following operations: transferring to a first BWP indicated by a BWP transfer identifier included in a target message in a random access procedure according to the BWP transfer identifier; reinitiating the random access procedure on the first BWP; or reinitiating the random access procedure on a beam on the first BWP with a channel quality higher than a third threshold.

5. The terminal according to claim 4, characterized by The target message comprises any one of the following: a random access response message of four-step random access; downlink control information for scheduling a random access response of four-step random access; a contention resolution message of four-step random access; a message B of two-step random access.

6. The terminal according to claim 4, characterized by The processor is further configured to read the computer program in the memory and perform the following operations: a random access failure is determined when a random access response RAR window of four-step random access is timed out; a random access failure is determined when a contention window of four-step random access is timed out; a random access failure is determined when no contention resolution signaling corresponding to the terminal is received within the contention window of four-step random access; a random access failure is determined when decoding fails within the contention window of four-step random access; a random access failure is determined when a message B window of two-step random access is timed out. 7.A device for switching BWP, applied to a terminal, characterized in that, comprise: a transfer unit configured to transfer to a first BWP indicated by a BWP transfer identifier included in a target message in a random access procedure according to the BWP transfer identifier; The apparatus further comprises: a first processing unit configured to reinitiate the random access procedure on the first BWP; or reinitiate the random access procedure on a beam on the first BWP with a channel quality higher than a third threshold.

8. A processor-readable storage medium, comprising: The processor readable storage medium stores a computer program, and the computer program is configured to cause the processor to perform the method of any one of claims 1 to 3.

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