Communication method and device, terminal, chip and storage medium

Abstract

The invention provides a communication method and device, a terminal, a chip and a storage medium, and relates to the field of communication, and the method comprises the steps: receiving DCI signaling sent by network equipment; wherein the DCI signaling comprises configuration information used for the BWP switching; responding to the terminal to execute the random access process, and determining a random access scene to which the random access process belongs; an arbitration operation is performed based on the random access scenario to select at least one of the following behaviors: performing a BWP handover, discarding the BWP handover, discarding the random access procedure, performing the random access procedure, and delaying the execution of the random access procedure. Therefore, the terminal can autonomously select to execute the BWP switching, discard the BWP switching, discard the random access process, continue to execute the random access process or delay to execute the random access process according to real-time service requirements, network states and the like, the resource allocation efficiency can be optimized, and the adaptability of the terminal to diversified service scenes is enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, and in particular to a communication method, device, terminal, chip and storage medium. BACKGROUND

[0002] In a 5G New Radio (NR) system, in order to balance diversified business requirements and energy efficiency, a network device usually configures multiple bandwidth parts (BandWidth Part, BWP) for a terminal, for example, in a Time Division Duplex (TDD) 30kHz subcarrier spacing scenario, the network device can configure two BWPs: a large bandwidth BWP (such as 273 Resource Blocks, RB): used for high throughput data transmission; a small bandwidth BWP (such as 52 RBs): used for low business load or energy saving mode. Among them, the network device can dynamically instruct the terminal to switch the BWP through the Downlink Control Information (DCI) signaling to match the real-time business requirements or optimize the energy consumption.

[0003] However, when the terminal is performing a random access procedure, if the DCI signaling for triggering BWP switching is received at the same time, how the terminal operates autonomously is of great significance to guarantee communication continuity, resource utilization efficiency and user experience. SUMMARY

[0004] The present application proposes a communication method, device, terminal, chip and storage medium to at least solve one of the technical problems in the related art.

[0005] An embodiment of the present application provides a communication method, comprising: receiving DCI signaling sent by a network device; wherein the DCI signaling includes configuration information for BWP switching; in response to the terminal performing a random access procedure, determining a random access scenario to which the random access procedure belongs; based on the random access scenario, performing an arbitration operation to select at least one of the following behaviors: performing BWP switching, discarding the BWP switching, discarding the random access procedure, performing the random access procedure, and delaying the execution of the random access procedure.

[0006] Another aspect of the present application provides a communication device, comprising: a receiving module configured to receive a downlink control information (DCI) signaling sent by a network device; wherein the DCI signaling comprises configuration information for BWP switching; a determining module configured to determine a random access scenario to which a random access procedure performed by the terminal belongs in response to the terminal performing the random access procedure; and a selecting module configured to perform an arbitration operation based on the random access scenario to select at least one of the following behaviors: performing BWP switching, discarding the BWP switching, discarding the random access procedure, performing the random access procedure, and delaying the performing of the random access procedure.

[0007] Another aspect of the present application provides a terminal, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the communication method of the foregoing aspect.

[0008] Another aspect of the present application provides a chip, comprising an interface circuit and a processing circuit coupled to each other, wherein the interface circuit is configured to input or output signals, and the processing circuit is configured to execute the communication method of the foregoing aspect or the communication method of the foregoing another aspect.

[0009] Another aspect of the present application provides a non-transitory computer-readable storage medium having computer program instructions stored thereon, wherein the computer program instructions are executable by a processor to implement the communication method of the foregoing aspect.

[0010] Another aspect of the present application provides a computer program product having a computer program stored thereon, wherein the program is executable by a processor to implement the communication method of the foregoing aspect.

[0011] The communication method, device, terminal, chip, and storage medium provided by the present application can enable the terminal to autonomously select, according to real-time service requirements and network states, whether to perform BWP switching, discard BWP switching, discard a random access procedure, continue to perform the random access procedure, or delay the performing of the random access procedure, in the case where BWP switching indicated by DCI signaling and the random access procedure coexist, thereby optimizing resource allocation efficiency, reducing operation conflicts and time delays, enhancing the adaptability of the terminal to diversified service scenarios, and further improving the overall performance and energy efficiency of the system.

[0012] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0013] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of embodiments, taken in conjunction with the references to the following drawings, wherein: Figure 1 A flowchart of a communication method according to an exemplary embodiment of the present application; Figure 2 A flowchart of another communication method according to an exemplary embodiment of the present application; Figure 3 A flowchart of yet another communication method according to an exemplary embodiment of the present application; Figure 4 A flowchart of still another communication method according to an exemplary embodiment of the present application; Figure 5 A flowchart of yet another communication method according to an exemplary embodiment of the present application; Figure 6 A block diagram of a communication apparatus according to an exemplary embodiment of the present application; Figure 7 A block diagram of a terminal according to an exemplary embodiment of the present application; Figure 8 A block diagram of a chip according to an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0014] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the embodiments of the application are shown as examples. The embodiments of the application described below are intended to explain the principles of the application and enable a person skilled in the art to implement and use the application in any appropriate technical field, and are not intended to limit the scope of the application.

[0015] In the related art, a network device can dynamically instruct a terminal to switch a BWP through DCI signaling to match real-time service requirements or optimize energy consumption. The naming rules of DCI are as follows: the naming of DCI format (Format) usually adopts the form of DCI Format X_Y, for example, DCI Format 0_1 (dci01): used for uplink scheduling (Physical Uplink Shared Channel (PUSCH) scheduling), containing uplink resource allocation, Modulation and Coding Scheme (MCS), Hybrid Automatic Repeat Request (HARQ) process number, bwpId field and other information, wherein the bwpId field is used to dynamically indicate the target BWP to which the terminal is to be switched; DCI Format 1_1 (dci11): used for downlink scheduling (Physical Downlink Shared Channel (PDSCH) scheduling), containing downlink resource allocation, MCS, HARQ information, bwpId field and the like.

[0016] Exemplarily, the network device can select the bwpId field in the DCI Format 0_1 (dci01) or the DCI Format 1_1 (dci11) to notify the terminal to perform active BWP switching, and the terminal follows the received DCI signaling to perform BWP switching to switch from a source BWP to a target BWP.

[0017] In the related art, when BWP switching and random access indicated by the DCI signaling occur at the same time, the terminal can perform the following two self-selection strategies: First: the terminal discards the random access process and performs BWP switching indicated by dci01 or dci11.

[0018] Second: the terminal discards the BWP switching indicated by dci01 or dci11 and continues to complete the random access process.

[0019] The above self-selection strategies are fixed priority rules, for example, “BWP switching always takes priority” or “random access cannot be interrupted”, which cannot dynamically adapt to scenario differences and may cause resource waste.

[0020] Therefore, to solve at least one of the problems in the above related art, the present application proposes a communication method, device, terminal, chip and storage medium.

[0021] The communication method, device, terminal, chip and storage medium of the embodiments of the present application are described below with reference to the accompanying drawings.

[0022] Figure 1 A flowchart of a communication method provided for the exemplary embodiments of the present application.

[0023] It should be noted that the communication method of the embodiments of the present application can be applied to a communication device, which can be configured in a terminal or a chip in some possible embodiments, so that the terminal or the chip can perform a communication function. In addition, in some possible embodiments, the communication device can also be software in the terminal, etc.

[0024] In any one of the embodiments of the present application, the chip can be integrated into the terminal. The chip includes a central processing unit (CPU), an image signal processing (ISP), an application-specific integrated circuit (ASIC), a digital signal processor (DSP), a field-programmable gate array (FPGA), a system on chip (SOC), a reduced instruction set computer (RISC), etc., which are not listed one by one.

[0025] In this context, a terminal is a user-side entity used to receive or transmit signals, such as a mobile phone. A terminal can also be called a terminal device (terminal), user equipment (UE), mobile station (MS), mobile terminal device (MT), etc. Terminals can be communication-enabled vehicles, smart cars, mobile phones, wearable devices, tablets, computers with wireless transceiver capabilities, virtual reality (VR) terminals, augmented reality (AR) terminals, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, and so on. The embodiments in this application do not limit the specific technology or device form used in the terminal.

[0026] For ease of explanation, the following description will use the terminal as the executing entity of this communication method as an example.

[0027] like Figure 1 As shown, the communication method may include the following steps S101 to S103: Step S101: Receive DCI signaling sent by the network device; wherein the DCI signaling includes configuration information for BWP handover.

[0028] The network device is an entity for transmitting or receiving signals on the network side. For example, the network device can be an evolved NodeB (eNB), a transmission reception point (TRP), a next generation NodeB (gNB) in a 5G new radio (NR) system, a base station in other future mobile communication systems, or an access node in a wireless fidelity (WiFi) system. Embodiments of the present application do not limit the specific technology and specific device form of the network device. The network device provided in the embodiments of the present application can be composed of a central unit (CU) and a distributed unit (DU). The CU can also be referred to as a control unit (CU). The CU-DU structure can split the protocol layer of the network device, for example, the base station, and the functions of part of the protocol layer are controlled by the CU, and the functions of the remaining part or all of the protocol layer are distributed in the DU and controlled by the CU.

[0029] The DCI signaling can include not only the configuration information for BWP switching, but also other information.

[0030] For example, when the DCI format of the DCI signaling is a first DCI format (such as dci01) for scheduling uplink transmission, the DCI signaling can include uplink resource allocation, MCS, HARQ process number, bwpId field, and the like.

[0031] For example, when the DCI format of the DCI signaling is a second DCI format (such as dci11) for scheduling downlink transmission, the DCI signaling can include downlink resource allocation, MCS, HARQ information, bwpId field, and the like.

[0032] In the embodiments of the present application, the terminal can receive the DCI signaling sent by the network device, wherein the DCI signaling includes configuration information for BWP switching. For example, the bwpId field in the DCI signaling can be used to indicate the configuration information for BWP switching.

[0033] In step S102, in response to the terminal performing the random access procedure, the random access scenario to which the random access procedure belongs is determined.

[0034] The random access scenarios include a non-network device indicated contention-based random access scenario and a network device indicated non-contention random access scenario.

[0035] The contention-based random access scenarios include an initial access scenario for contention-based connection establishment, an initial access scenario for contention-based connection reestablishment, an initial access scenario for contention-based connection resume, an access scenario for contention-based cell handover, an access scenario for contention-based uplink grant resource application, an access scenario for contention-based physical downlink control channel (PDCCH) order, and an access scenario for contention-based system message reading.

[0036] The non-contention random access scenarios include a non-contention cell handover access scenario, a non-contention PDCCH order access scenario, and a non-contention system message reading access scenario.

[0037] In the embodiment of the present application, when the terminal is currently performing a random access procedure, i.e., the DCI signaling indicated BWP switching and the random access procedure coexist, the terminal can first determine the random access scenario to which the currently performed random access procedure belongs.

[0038] In step S103, arbitration is performed based on the random access scenario to select at least one of the following behaviors: performing BWP switching, discarding BWP switching, discarding the random access procedure, performing the random access procedure, and delaying the execution of the random access procedure.

[0039] In the embodiment of the present application, the terminal can perform arbitration based on the random access scenario to select at least one of the following behaviors: performing BWP switching, discarding BWP switching, discarding the random access procedure, continuing to perform the random access procedure, and delaying the execution of the random access procedure. That is, in the case where the DCI signaling indicated BWP switching and the random access procedure coexist, the terminal can select, for different random access scenarios, whether to perform the DCI signaling indicated BWP switching, discard the DCI signaling indicated BWP switching, continue to perform the random access procedure, discard the random access procedure, or delay the execution of the random access procedure.

[0040] The communication method of the embodiment of the present application can enable the terminal to autonomously select to perform BWP switching, discard BWP switching, discard the random access procedure, continue to perform the random access procedure, or delay the execution of the random access procedure according to real-time service requirements and network states, etc., based on the arbitration mechanism of the random access scenario to which the terminal currently performs the random access procedure, in the case where the DCI signaling indicates the coexistence of BWP switching and the random access procedure, so as to realize the optimization of resource allocation efficiency, reduce operation conflicts and time delay, and enhance the adaptability of the terminal to diversified service scenarios, thereby realizing the synergistic improvement of the overall performance and energy efficiency of the system.

[0041] As a possible implementation manner, Figure 2 The flowchart of another communication method provided by the exemplary embodiments of the present application is shown.

[0042] It should be noted that the communication method can be executed alone, or can be executed in combination with any one of the embodiments or the possible implementation manners of the embodiments, or can be executed in combination with any one of the technical solutions in the related art, and the embodiments of the present application do not limit this.

[0043] As Figure 2 shown, the communication method can include the following steps S201 to S203: Step S201, receiving the DCI signaling sent by the network device; wherein the DCI signaling includes configuration information for BWP switching.

[0044] Step S202, in response to the terminal performing the random access procedure, determining the random access scenario to which the random access procedure belongs.

[0045] It should be noted that the explanation and description of steps S201 to S202 can refer to the related description in any one of the embodiments of the present application, which will not be repeated here.

[0046] Step S203, in response to the random access scenario including a first random access scenario not indicated by the network device, discarding the BWP switching and performing the random access procedure on the source BWP.

[0047] Wherein, the source BWP refers to the BWP before the terminal switches.

[0048] Wherein, the first random access scenario is not the random access scenario indicated by the network device, i.e. the random access demand triggered autonomously by the terminal based on the contention mechanism. Exemplarily, the first random access scenario is the random access procedure autonomously triggered by the terminal based on the local protocol stack decision when there is no dedicated random access resource configuration, using the Contention-based Random Access Preamble (common preamble).

[0049] Exemplarily, the first random access scenario includes but is not limited to any one of the following: an initial access scenario of contention-based connection establishment, an initial access scenario of contention-based connection reestablishment, an initial access scenario of contention-based connection resume, an access scenario of contention-based cell switching, and a pdcch order access scenario.

[0050] In the embodiment of the present application, in the case that the random access scenario to which the random access procedure currently performed by the terminal belongs is the first random access scenario indicated by the network device, the terminal can discard the BWP switching and continue to perform the random access procedure on the source BWP.

[0051] As an example, in the case that the first random access scenario is an initial access scenario of contention-based connection establishment, an initial access scenario of contention-based connection reestablishment, or an initial access scenario of contention-based connection resume, when the terminal is in RRC_IDLE / INACTIVE (idle state / inactive state) and has not established a connection with the network device, or when the radio resource control (RRC) connection between the terminal and the network device has been disconnected, i.e., the terminal and the network device have been disconnected, the terminal can choose to discard the BWP switching and continue to complete the random access procedure. In this way, the interruption of the random access procedure caused by BWP switching can be avoided, the access success rate can be improved, and the atomicity of the access procedure can be ensured.

[0052] As another example, in the case that the first random access scenario is an access scenario of contention-based cell switching, when the terminal judges that the target cell is better based on the measurement report or the preconfigured rule, i.e., the terminal finds a more suitable target cell, the terminal can choose to complete the random access procedure of switching. In this way, the terminal can be quickly accessed in the target cell, the call drop (such as communication interruption in a high-speed moving scenario) can be avoided, and the switching continuity can be maintained.

[0053] As yet another example, in the case that the first random access scenario is a pdcch order access scenario, it indicates that the uplink between the terminal and the network device is out of synchronization, when the uplink synchronization state is lost (such as when the timer T310 / T311 is timed out) and the connection needs to be resumed through a contention-based preamble, the terminal can choose to discard the BWP switching and complete the random access procedure. In this way, the uplink synchronization can be quickly recovered, the delay caused by BWP switching can be reduced, and the continuity of real-time services can be ensured.

[0054] The communication method of the embodiment of the present application, the first random access scenario refers to a random access demand triggered by a terminal autonomously and based on a contention resolution mechanism, without dedicated signaling triggering, with a risk of resource competition among multiple terminals, and sensitive to access delay. In such a scenario, in order to ensure the atomicity of the random access process and the consistency of the protocol state, the terminal is forced to discard the BWP switching, and the random access process is ensured to be completed in the source BWP.

[0055] As a possible implementation, Figure 3 A flowchart of another communication method provided by an exemplary embodiment of the present application is shown.

[0056] It should be noted that the communication method can be executed alone, or in combination with any of the embodiments or possible implementations of the embodiments of the present application, or in combination with any of the technical solutions in the related art, and the present application does not limit this.

[0057] As Figure 3 shown, the communication method can include the following steps S301-S306: Step S301, receiving DCI signaling sent by a network device; wherein the DCI signaling includes configuration information for BWP switching.

[0058] Step S302, in response to the terminal executing a random access process, determining the random access scenario to which the random access process belongs.

[0059] Step S303, in response to the random access scenario including a second random access scenario not indicated by the network device, determining whether the DCI format of the DCI signaling is a first DCI format for scheduling uplink transmission, if yes, executing step S304, if no, executing steps S305-S306.

[0060] The second random access scenario is not a random access scenario indicated by the network device. For example, the second random access scenario is a random access process triggered by the terminal due to uplink grant (UL Grant) resource application demand without explicit indication by the network device and based on a contention mechanism. That is, the second random access scenario includes an access scenario based on contention for uplink grant resource application.

[0061] The first DCI format (such as DCI Format 0_1, i.e. dci01) is used to schedule uplink transmission; and the DCI signaling of the first DCI format also indicates uplink resources for uplink transmission.

[0062] It should be noted that step S304 and steps S305-S306 are two possible implementations in parallel, and only one of them needs to be executed in actual application.

[0063] Step S304, discarding the random access procedure, and performing BWP switching based on the configuration information to switch from the source BWP to the target BWP.

[0064] The source BWP refers to the BWP before the terminal switching, and the target BWP refers to the new BWP after the terminal switching.

[0065] In the embodiments of the present application, in the case that the random access scenario to which the random access procedure currently performed by the terminal belongs is the second random access scenario (such as the access scenario based on the contention-based uplink grant resource application) indicated by the network device, and the DCI format of the DCI signaling received by the terminal is the first DCI format, the DCI signaling has indicated the uplink resource for uplink transmission, and the terminal does not need to apply for the uplink grant resource again. At this time, in order to optimize the resource utilization efficiency, avoid invalid competition, and ensure the timeliness of BWP switching, the terminal can discard the random access procedure, and perform BWP switching based on the configuration information in the DCI signaling to switch from the source BWP to the target BWP.

[0066] Step S305, suspending the execution of the random access procedure, and performing BWP switching based on the configuration information to switch from the source BWP to the target BWP.

[0067] In the embodiments of the present application, in the case that the random access scenario to which the random access procedure currently performed by the terminal belongs is the second random access scenario (such as the access scenario based on the contention-based uplink grant resource application) indicated by the network device, and the DCI format of the DCI signaling received by the terminal is the second DCI format for scheduling downlink transmission, the DCI signaling only indicates the downlink resource for downlink transmission, and does not indicate the uplink resource for uplink transmission. At this time, in order to preferentially guarantee the continuity of downlink data transmission, follow the mutual exclusivity principle of the protocol procedure, and ensure the effectiveness of the random access procedure on the target BWP, the terminal can select to perform BWP switching and delay the execution of the random access procedure, that is, the terminal can first suspend the execution of the random access procedure, and then perform BWP switching based on the configuration information to switch from the source BWP to the target BWP, so as to execute the random access procedure on the target BWP.

[0068] The DCI signaling of the second DCI format (such as DCI Format 1_1, i.e., dci11) also indicates the downlink resource for downlink transmission.

[0069] Step S306, in response to the completion of BWP switching, executing the random access procedure on the target BWP.

[0070] In the embodiment of the present application, in the case where the BWP switching is completed, the terminal can perform a random access procedure on the target BWP to apply for an uplink grant resource.

[0071] The communication method of the embodiment of the present application significantly improves the system efficiency in the second random access scenario by using the differentiated processing strategy for different DCI formats: when the DCI signaling of the first DCI format is received, since the uplink resource has been allocated by the DCI signaling, the terminal can directly release the common preamble resource and reduce the collision risk by immediately discarding the redundant contention-based random access procedure, and at the same time, the BWP switching is quickly completed based on the DCI signaling indication, realizing the double optimization of uplink transmission efficiency and resource utilization; when the DCI signaling of the second DCI format for scheduling downlink transmission is received, the terminal preferentially performs BWP switching to ensure the real-time performance of downlink data reception, and reinitiates the random access adapted to the new PRACH configuration on the target BWP, thereby ensuring the strong consistency of the random access procedure and resource configuration.

[0072] As a possible implementation manner, Figure 4 A flowchart of another communication method provided by an exemplary embodiment of the present application is shown.

[0073] It should be noted that the communication method can be executed alone, or can be executed in combination with any one of the embodiments or possible implementation manners of the embodiments of the present application, or can be executed in combination with any one of the technical solutions in the related art, and the embodiments of the present application do not limit this.

[0074] As Figure 4 shown, the communication method can include the following steps S401 to S405: Step S401, receiving DCI signaling sent by a network device; wherein the configuration information for BWP switching is included in the DCI signaling.

[0075] Step S402, in response to the terminal performing a random access procedure, determining the random access scenario to which the random access procedure belongs.

[0076] It should be noted that the explanation and description of step S401 can refer to the related description in any one of the embodiments of the present application, which will not be repeated here.

[0077] Step S403, in response to the random access scenario including a third random access scenario not indicated by the network device, suspending the execution of the random access procedure.

[0078] The third random access scenario is not a random access scenario indicated by the network device. For example, the third random access scenario is a random access procedure based on a contention mechanism triggered by the terminal due to a system information (SI) reading requirement without explicit indication of the network device, that is, the third random access scenario includes an access scenario based on contention SI reading.

[0079] In the embodiment of the present application, when the random access scenario to which the random access procedure currently performed by the terminal belongs is the third random access scenario (such as the access scenario based on contention SI reading), it indicates that the terminal needs to obtain or update system information through random access, and the random access procedure in this scenario is highly dependent on the PRACH resource configuration of the current BWP. At this time, in order to guarantee the reliability of system information reading, follow the mutual exclusion protocol rules of BWP switching operation and random access procedure, and ensure that the PRACH parameters of the target BWP are strongly matched with the random access requirement, in the present application, the terminal can choose to complete the BWP switching and delay the execution of the random access procedure, that is, the terminal can first suspend the execution of the random access procedure.

[0080] In step S404, BWP switching is performed based on the configuration information to switch from the source BWP to the target BWP.

[0081] The source BWP refers to the BWP before the terminal switches, and the target BWP refers to the new BWP after the terminal switches.

[0082] In step S405, in response to the completion of the BWP switching, the random access procedure is executed on the target BWP.

[0083] In the embodiment of the present application, the terminal can perform BWP switching based on the configuration information in the DCI signaling to switch from the source BWP to the target BWP, and execute the random access procedure on the target BWP after the BWP switching is completed to read the latest SI.

[0084] The communication method of the embodiment of the present application can realize the dual protection of the reliability of system information acquisition and the efficiency of air interface resources by preferentially performing BWP switching and delaying the execution of the random access procedure in the third random access scenario: on the one hand, it ensures that the terminal reads the system information synchronized with the network configuration on the target BWP, avoiding system information invalidation or access anomalies caused by BWP mismatch; on the other hand, by following the mutual exclusion rules of BWP switching operation and random access in the protocol, the PRACH resource adaptation is strongly associated with the target BWP, reducing the risk of access failure caused by parameter conflict, and optimizing the utilization rate of common preamble resources. This mechanism significantly improves the robustness of system information transmission and the adaptability of the random access procedure on the basis of guaranteeing the consistency of the protocol state.

[0085] As a possible implementation manner, Figure 5 A flowchart of another communication method provided by an exemplary embodiment of the present application is shown in FIG. 6.

[0086] It should be noted that the communication method can be executed alone, or can be executed in combination with any of the embodiments or possible implementation manners of the embodiments, or can be executed in combination with any of the technical solutions in the related art, and the embodiments of the present application do not limit this.

[0087] Figure 5 A flowchart of another communication method provided by an exemplary embodiment of the present application is shown in FIG. 6.

[0088] As shown in FIG. 5, the communication method can include the following steps S501-S503: Figure 5 Step S501, receiving DCI signaling sent by a network device; wherein the DCI signaling includes configuration information for BWP switching. Step S502, in response to the terminal executing a random access procedure, determining a random access scenario to which the random access procedure belongs.

[0089] It should be noted that the explanation and description of step S501 can refer to the related description in any of the embodiments of the present application, which will not be repeated here.

[0090] Step S503, in response to the random access scenario including a fourth random access scenario indicated by the network device, discarding the BWP switching and executing the random access procedure on the source BWP.

[0091] Among them, the fourth random access scenario is the random access scenario indicated by the network device, and exemplarily, the fourth random access scenario includes but is not limited to any of the following: a non-contention cell switching access scenario, a non-contention physical pdcch order access scenario, and a non-contention system message reading access scenario.

[0092] In the embodiments of the present application, in the case that the random access scenario to which the random access procedure currently executed by the terminal belongs is the fourth random access scenario indicated by the network device, the terminal can discard the BWP switching and continue to execute the random access procedure on the source BWP.

[0093] As an example, in the case that the fourth random access scenario is a non-contention cell switching access scenario, a non-contention physical pdcch order access scenario, or a non-contention system message reading access scenario, the terminal can preferentially select the random access procedure indicated by the network device and discard the BWP switching.

[0094]

[0095] ​In any one of the embodiments of the present application, when the DCI signaling sent by the network device indicates the coexistence of BWP switching and random access, the terminal can select to discard the BWP switching indicated by the DCI signaling, or select to discard the random access, or delay the random access, for different random access scenarios. For example, for the access scenario of contention-based uplink grant resource application, the BWP switching is completed first, and the random access is discarded or delayed; for the access scenario of contention-based system message reading, the BWP switching is completed, and the random access is delayed; for other random access scenarios, the DCI signaling indicated BWP switching is discarded. Exemplarily, the autonomous selection strategy of random access and BWP switching can be as shown in Table 1.

[0096] Table 1 Autonomous selection strategy of random access and BWP switching

[0097] In Table 1, the BWP switching refers to the BWP switching indicated by the DCI signaling sent by the network device.

[0098] The communication method of the embodiments of the present application, in the fourth random access scenario, the terminal can realize the collaborative optimization of low latency, high reliability and resource efficient utilization by preferentially executing the dedicated random access process indicated by the network device and actively discarding the BWP switching: on the one hand, the non-competitive mechanism eliminates the risk of competition conflict by pre-allocating dedicated preambles (Dedicated Preamble) and uplink resources, significantly shortens the access latency (such as realizing millisecond-level switching in the cell switching scenario), and at the same time ensures the real-time and reliable transmission of key control signaling (such as PDCCH Order) or system message; on the other hand, by bypassing the BWP switching process, the terminal can complete access directly based on the PRACH resource configuration of the current BWP, avoiding the resource reconfiguration delay and protocol state machine complexity caused by switching, thereby optimizing the air interface resource utilization (such as reducing the occupation of common preambles and signaling overhead) while ensuring service continuity.

[0099] In order to realize the above-mentioned embodiments, the embodiments of the present application also propose a communication device.

[0100] Figure 6 A structural schematic diagram of a communication device provided for an exemplary embodiment of the present application.

[0101] As Figure 6 shown, the communication device 600 can include a receiving module 610, a determining module 620, and a selecting module 630.

[0102] The receiving module 610 is configured to receive downlink control information (DCI) signaling sent by the network device, wherein the DCI signaling comprises configuration information for BWP switching; the determining module 620 is configured to determine a random access scenario to which a random access procedure belongs in response to the terminal performing the random access procedure; and the selecting module 630 is configured to perform arbitration based on the random access scenario to select at least one of the following behaviors: performing BWP switching, discarding BWP switching, discarding the random access procedure, performing the random access procedure, and delaying the execution of the random access procedure.

[0103] In an implementation form of the embodiment of the present application, the selecting module 630 is configured to discard BWP switching and perform the random access procedure on the source BWP in response to the random access scenario comprising a first random access scenario that is not indicated by the network device.

[0104] In an implementation form of the embodiment of the present application, the first random access scenario is a random access procedure autonomously triggered by the terminal and using a common preamble when there is no dedicated random access resource configuration; and the first random access scenario comprises any one of the following: an initial access scenario for contention-based connection establishment; an initial access scenario for contention-based connection re-establishment; an initial access scenario for contention-based connection recovery; an access scenario for contention-based cell switching; and a pdcch order access scenario based on contention.

[0105] In an implementation form of the embodiment of the present application, the selecting module 630 is configured to discard the random access procedure in response to the random access scenario comprising a second random access scenario that is not indicated by the network device and the DCI format of the DCI signaling being a first DCI format for scheduling uplink transmission; and perform BWP switching from the source BWP to the target BWP based on the configuration information.

[0106] In an implementation form of the embodiment of the present application, the selecting module 630 is configured to suspend the execution of the random access procedure in response to the random access scenario comprising a second random access scenario that is not indicated by the network device and the DCI format of the DCI signaling being a second DCI format for scheduling downlink transmission; perform BWP switching from the source BWP to the target BWP based on the configuration information; and perform the random access procedure on the target BWP in response to the completion of the BWP switching.

[0107] In an implementation form of the embodiment of the application, the second random access scenario is a random access procedure triggered by the terminal due to uplink grant resource application demand without explicit indication of the network device; the second random access scenario includes an access scenario based on contention for uplink grant resource application; the DCI signaling of the first DCI format further indicates uplink resources for uplink transmission; and the DCI signaling of the second DCI format further indicates downlink resources for downlink transmission.

[0108] In an implementation form of the embodiment of the application, the selection module 630 is configured to: in response to the random access scenario including the third random access scenario indicated by the network device, suspend the execution of the random access procedure; perform BWP switching based on the configuration information to switch from the source BWP to the target BWP; and in response to completion of the BWP switching, perform the random access procedure on the target BWP.

[0109] In an implementation form of the embodiment of the application, the third random access scenario is a random access procedure triggered by the terminal due to system message reading demand without explicit indication of the network device; the third random access scenario includes an access scenario based on contention for system message reading.

[0110] In an implementation form of the embodiment of the application, the selection module 630 is configured to: in response to the random access scenario including the fourth random access scenario indicated by the network device, discard the BWP switching and perform the random access procedure on the source BWP.

[0111] In an implementation form of the embodiment of the application, the fourth random access scenario includes any one of the following: a non-contention cell switching access scenario; a non-contention physical downlink control channel order (PDCCH order) access scenario; and a non-contention system message reading access scenario.

[0112] It should be noted that the foregoing explanation and description of the communication method embodiment performed by the terminal also apply to the communication device of the embodiment, which will not be described here again.

[0113] In the communication device of the embodiment of the application, in the case where the BWP switching indicated by the DCI signaling and the random access procedure coexist, based on the arbitration mechanism of the random access scenario to which the random access procedure currently performed by the terminal belongs, the terminal can autonomously select to perform BWP switching, discard BWP switching, discard the random access procedure, continue to perform the random access procedure, or delay the execution of the random access procedure according to real-time business demand and network state, etc., which can realize optimization of resource allocation efficiency, reduction of operation conflict and time delay, and enhancement of the adaptability of the terminal to diversified business scenarios, thereby realizing the synergistic improvement of the overall performance and energy efficiency of the system.

[0114] To achieve the above-mentioned embodiments, the application further provides a terminal comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the communication method according to any one of the preceding embodiments when executing the program.

[0115] Figure 7 A structural diagram of a terminal according to an exemplary embodiment of the present application is provided. For example, the terminal 700 can be a mobile phone, a computer, a digital broadcast terminal, a messaging equipment, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0116] Referring to Figure 7 , the terminal 700 can include one or more of the following components: a processing component 702, a memory 704, a power supply component 706, a multimedia component 708, an audio component 710, an input / output (I / O) interface 712, a sensor component 714, and a communication component 716.

[0117] The processing component 702 usually controls overall operations of the terminal 700, such as operations associated with displaying, making phone calls, data communications, camera operations and recording operations. The processing component 702 can include one or more processors 720 to execute instructions to complete all or part of steps of the methods described above. In addition, the processing component 702 can include one or more modules to facilitate the interaction between the processing component 702 and other components. For example, the processing component 702 can include a multimedia module to facilitate the interaction between the multimedia component 708 and the processing component 702.

[0118] The memory 704 is configured to store various types of data to support operations of the terminal 700. Examples of these data include instructions for any application or method operating on the terminal 700, contact data, phonebook data, messages, pictures, videos, etc. The memory 704 can be implemented by any type of volatile or nonvolatile memory devices or a combination thereof such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0119] The power component 706 provides power to various components of the terminal 700. The power component 706 can include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the terminal 700.

[0120] The multimedia component 708 includes a screen providing an output interface between the terminal 700 and a user. In some embodiments, the screen can include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense a touch, a slide and a gesture on the touch panel. The touch sensor can not only sense a boundary of a touching or a sliding action, but also detect duration and pressure related to the touching or sliding action. In some embodiments, the multimedia component 708 includes a front camera and / or a back camera. When the terminal 700 is in an operation mode such as a photographing mode or a video mode, the front camera and / or the back camera can receive external multimedia data. Each of the front camera and the back camera can be a fixed optical lens system or have a focal length and optical zoom capability.

[0121] The audio component 710 is configured to output and / or input audio signals. For example, the audio component 710 includes a microphone (MIC) that is configured to receive an external audio signal when the terminal 700 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal can be further stored in the memory 704 or transmitted via the communication component 716. In some embodiments, the audio component 710 also includes a speaker for outputting audio signals.

[0122] The I / O interface 712 provides an interface between the processing component 702 and peripheral interface modules, which can be a keypad, a click wheel, buttons, and the like. The buttons can include, but are not limited to, a home button, a volume button, a start button, and a lock button.

[0123] The sensor component 714 includes one or more sensors for providing status assessments of various aspects of the terminal 700. For example, the sensor component 714 can detect an open / closed position of the terminal 700, relative positioning of components, such as a display and a keypad of the terminal 700, a change of position of the terminal 700 or a component of the terminal 700, presence or absence of user contact with the terminal 700, orientation or acceleration / deceleration / g-force and temperature changes of the terminal 700. The sensor component 714 can include a proximity sensor that is configured to detect presence of a nearby object without any physical touch. The sensor component 714 can further include a light sensor, such as a complementary metal-oxide-semiconductor (CMOS) or charge-coupled device (CCD) image sensor, utilized in an imaging application. In some embodiments, the sensor component 714 can further include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0124] The communication component 716 is configured to facilitate wired or wireless communication between the terminal 700 and other devices. The terminal 700 can access a wireless network based on a communication standard, such as WiFi, 4G, or 5G, or a combination thereof. In an example embodiment, the communication component 716 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an example embodiment, the communication component 716 also includes a Near Field Communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on Radio Frequency Identification (RFID) techniques, Infrared Data Association (IrDA) techniques, Ultra-WideBand (UWB) techniques, Bluetooth (BT) techniques, and other techniques.

[0125] In an example embodiment, the terminal 700 can be implemented by one or more Application-Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field-Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic elements for performing the above-described methods.

[0126] In an example embodiment, a non-transitory computer-readable storage medium including instructions, such as the memory 704 including instructions, is also provided, which can be executed by the processor 720 of the terminal 700 to complete the above-described methods. For example, the non-transitory computer-readable storage medium can be a Read-Only Memory (ROM), a Random Access Memory (RAM), a Compact Disc Read-Only Memory (CD-ROM), a magnetic tape, a floppy disk, and an optical data storage device, etc.

[0127] To achieve the above-mentioned embodiments, the present application further provides a chip, wherein the chip comprises an interface circuit and a processing circuit coupled with each other, the interface circuit is configured to input or output a signal, and the processing circuit is configured to perform the communication method provided in any one of the above-mentioned embodiments.

[0128] Figure 8 is a structural schematic diagram of a chip provided in an exemplary embodiment of the present application. Referring to Figure 8 the structural schematic diagram of the chip 800 shown in FIG. 8, but the present application is not limited thereto.

[0129] The chip 800 comprises a processing circuit 801, which is configured to perform any one of the above-mentioned communication methods.

[0130] In some embodiments, the chip 800 further comprises one or more interface circuits 802. Optionally, the interface circuit 802 is connected with a memory 803, and the interface circuit 802 can be configured to receive a signal from the memory 803 or other devices, and the interface circuit 802 can be configured to send a signal to the memory 803 or other devices. For example, the interface circuit 802 can read an instruction stored in the memory 803 and send the instruction to the processing circuit 801.

[0131] In some embodiments, the interface circuit 802 performs at least one of the communication steps such as sending and / or receiving in the above-mentioned method, and the processing circuit 801 performs other steps.

[0132] In some embodiments, the terms such as interface circuit, interface, transceiver pin, and transceiver can be replaced with each other.

[0133] In some embodiments, the chip 800 further comprises one or more memories 803 for storing instructions. Optionally, all or part of the memory 803 can be outside the chip 800.

[0134] To achieve the above-mentioned embodiments, the present application further provides a non-transitory computer-readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the communication method provided in any one of the above-mentioned method embodiments.

[0135] To achieve the above-mentioned embodiments, the present application further provides a computer program product, which stores a computer program, and the computer program is executed by a processor to implement the communication method provided in any one of the above-mentioned method embodiments.

[0136] In the description of the application, reference to "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment or example. Furthermore, the described specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Moreover, the usage of the terms "first", "second" or "third" does not limit the quantity or order of the specific features, structures, materials or characteristics, but rather the term "first", "second" or "third" can be used to distinguish the specific features, structures, materials or characteristics from one another. In addition, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples, without changing the scope of the application.

[0137] Furthermore, the terms "first", "second", or the like do not denote any quantity or order, but rather serve as labels to distinguish between different instances of an element. Thus, a feature labeled "first" can imply or be understood to mean that there is at least one such feature, either explicitly or implicitly. In the description of the application, the meaning of "a plurality" is at least two, for example two, three or more, unless otherwise expressly specified.

[0138] Any process or method descriptions or blocks in flow charts or otherwise described herein represent embodiments which can be managed as one or more modules, segments, or portions of code which include one or more steps for implementing specific logic functions, and preferred embodiments of the application include additional or fewer processes, steps, operations, elements, or components, and the representation of a certain order to steps within the processes is not necessarily limited to indicate that the steps are related in order of completion or are carried out sequentially, unless explicitly stated or otherwise inherently implied by the description.

[0139] The logic and / or steps represented in flow diagrams or otherwise described herein, for example, can be considered as a sequence of instructions to implement logic functions, and can be realized in any computer-readable medium for use by an instruction execution system, apparatus, or device, such as a computer-based system, processor- based system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. In the context of this specification, a "computer-readable medium" can be any means that can contain, store, communicate, propagate or transport the program for use by or in connection with the instruction execution system, apparatus, or device. The computer-readable medium can be a machine-readable storage device (e.g., magnetic, optical or other storage device), a machine-readable storage substrate, a machine-readable signal, or any combination thereof. Other, specific examples (a non-exhaustive list) of the computer-readable medium include the following: an electrical connection (electrical) having one or more wires, a portable computer diskette (magnetic), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber (optical), and a portable compact disc read-only memory (CDROM). Note that the computer-readable medium can even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, for example via the optical scanner of a device or device, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and stored in a computer memory.

[0140] It should be understood that aspects of the application can be implemented in hardware, software, firmware or combinations thereof. In the above embodiments, various steps or methods can be implemented in software or firmware that is stored in memory and executed by a suitable instruction execution system. As such, in some embodiments, the steps or methods can be implemented in a combination of hardware and software. If implemented in hardware, as in another embodiment, any of the above techniques can be implemented with or without the use of a programmable data processing apparatus, using any of the following technologies: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having appropriate combinational logic gates, programmable gate arrays (PGA), field programmable gate arrays (FPGA), and the like.

[0141] Those of skill in the art would understand that information and signals can be represented using any of a variety of technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that can be referenced throughout the above description can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0142] In addition, each functional unit in each embodiment of the present application can be integrated in one processing module, or each unit can be physically present separately, or two or more units can be integrated in one module. The integrated module can be realized in the form of hardware or in the form of a software functional module. When the integrated module is realized in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer readable storage medium.

[0143] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A communication method, characterized in that, include: Receive downlink control information (DCI) signaling sent by network devices; wherein the DCI signaling includes configuration information for bandwidth portion (BWP) handover; In response to the terminal executing a random access procedure, determine the random access scenario to which the random access procedure belongs; An arbitration operation is performed based on the random access scenario to select at least one of the following actions: perform BWP handover, discard the BWP handover, discard the random access procedure, perform the random access procedure, or delay the execution of the random access procedure.

2. The method according to claim 1, characterized in that, The arbitration operation based on the random access scenario includes: In response to the random access scenario including a first random access scenario not indicated by a network device, the BWP handover is discarded, and the random access procedure is executed on the source BWP.

3. The method according to claim 2, characterized in that, The first random access scenario is a random access process that is triggered autonomously by the terminal when there is no dedicated random access resource configuration and uses a common preamble. The first random access scenario includes any one of the following: Initial access scenario based on competition-based connection establishment; Initial access scenario based on competition-driven connection reconstruction; Initial access scenario based on competition-based connection recovery; Access scenarios based on competition-driven cell handover; Access scenario based on competition for physical downlink control channel command (pdcch order).

4. The method according to claim 1, characterized in that, The arbitration operation based on the random access scenario includes: In response to the random access scenario including a second random access scenario not indicated by a network device, and the DCI format of the DCI signaling being a first DCI format used for scheduling uplink transmission, the random access procedure is discarded. The BWP switch is performed based on the configuration information to switch from the source BWP to the target BWP.

5. The method according to claim 1, characterized in that, The arbitration operation based on the random access scenario includes: In response to the random access scenario including a second random access scenario not indicated by a network device, and the DCI format of the DCI signaling being a second DCI format used for scheduling downlink transmission, the execution of the random access procedure is suspended. The BWP switch is performed based on the configuration information to switch from the source BWP to the target BWP; In response to the completion of the BWP handover, the random access procedure is executed on the target BWP.

6. The method according to claim 4 or 5, characterized in that, The second random access scenario is a random access process triggered by the terminal's request for uplink authorized resources when there is no explicit indication from the network device. The second random access scenario includes access scenarios based on contention-based uplink grant resource requests; Among them, the DCI signaling of the first DCI format also indicates the uplink resources used for uplink transmission; The second DCI format DCI signaling also indicates the downlink resources used for downlink transmission.

7. The method according to claim 1, characterized in that, The arbitration operation based on the random access scenario includes: In response to the random access scenario including a third random access scenario not indicated by a network device, the execution of the random access procedure is suspended; The BWP switch is performed based on the configuration information to switch from the source BWP to the target BWP; In response to the completion of the BWP handover, the random access procedure is executed on the target BWP.

8. The method according to claim 7, characterized in that, The third random access scenario is a random access process triggered by the terminal due to system message reading requirements when there is no explicit instruction from the network device. The third random access scenario includes an access scenario based on competition for reading system messages.

9. The method according to claim 1, characterized in that, The arbitration operation based on the random access scenario includes: In response to the random access scenario including the fourth random access scenario indicated by the network device, the BWP handover is discarded, and the random access procedure is executed on the source BWP.

10. The method according to claim 9, characterized in that, The fourth random access scenario includes any one of the following: Non-competitive cell handover access scenarios; Non-contention-based access scenario using physical downlink control channel command (pdcch order); Access scenarios for non-competitive system message reading.

11. A communication device, characterized in that, include: A receiving module is used to receive downlink control information (DCI) signaling sent by a network device; wherein the DCI signaling includes configuration information for BWP handover; The determination module is used to determine the random access scenario to which the random access procedure belongs in response to the terminal executing the random access procedure; The selection module is used to perform arbitration operations based on the random access scenario to select at least one of the following actions: perform BWP handover, discard the BWP handover, discard the random access procedure, perform the random access procedure, or delay the execution of the random access procedure.

12. The apparatus according to claim 11, characterized in that, The selection module is configured to perform any of the following: In response to the random access scenario including a first random access scenario not indicated by a network device, the BWP handover is discarded, and the random access procedure is executed on the source BWP; In response to the random access scenario including a second random access scenario not indicated by a network device, and the DCI format of the DCI signaling being a first DCI format for scheduling uplink transmission, the random access procedure is discarded, and the BWP handover is performed based on the configuration information to switch from the source BWP to the target BWP. In response to the random access scenario including a second random access scenario not indicated by a network device, and the DCI format of the DCI signaling being a second DCI format for scheduling downlink transmission, the execution of the random access procedure is suspended, and the BWP handover is performed based on the configuration information to switch from the source BWP to the target BWP. In response to the completion of the BWP handover, the random access procedure is executed on the target BWP. In response to the random access scenario including a third random access scenario not indicated by a network device, the execution of the random access procedure is suspended, and the BWP handover is performed based on the configuration information to switch from the source BWP to the target BWP. In response to the completion of the BWP handover, the random access procedure is executed on the target BWP. In response to the random access scenario including the fourth random access scenario indicated by the network device, the BWP handover is discarded, and the random access procedure is executed on the source BWP.

13. A terminal, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, it implements the steps of the method as described in any one of claims 1 to 10.

14. A non-transitory computer-readable storage medium storing computer program instructions thereon, characterized in that, When executed by a processor, the program instructions implement the steps of the method according to any one of claims 1 to 10.

15. A chip, characterized in that, The chip includes an interface circuit and a processing circuit that are coupled to each other. The interface circuit is used to input or output signals, and the processing circuit is used to implement the method of any one of claims 1 to 10.

16. A computer program product, characterized in that, It includes a computer program, which, when executed by a processor, implements the steps of the method according to any one of claims 1 to 10.

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