CN111315018B

CN111315018B - Resource allocation method and equipment

Info

Publication number: CN111315018B
Application number: CN202010087396.3A
Authority: CN
Inventors: 邓云
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2020-02-11
Filing date: 2020-02-11
Publication date: 2022-10-11
Anticipated expiration: 2040-02-11
Also published as: CN111315018A

Abstract

The embodiment of the application provides a resource configuration method and equipment, wherein the resource configuration method comprises the following steps: receiving a switching command message sent by a source base station, wherein the switching command message is used for indicating terminal equipment which is in direct communication to carry out DAPS switching; before the terminal equipment is successfully accessed to the target base station, receiving first scheduling information sent by a source base station, wherein the first scheduling information is used for indicating a transmission resource which is configured for the terminal equipment and used for direct communication by the source base station; and after the terminal equipment is successfully accessed to the target base station, receiving second scheduling information sent by the target base station, wherein the second scheduling information is used for indicating transmission resources which are configured for the terminal equipment by the target base station and are used for direct communication. The method and the device realize that the terminal equipment adopts a scheduling resource allocation mode to obtain the transmission resources for direct communication in the DAPS switching process.

Description

Resource allocation method and equipment

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a resource configuration method and equipment.

Background

With the development of communication technology, direct communication technology has been proposed in recent years. The direct communication adopts a terminal-to-terminal direct communication mode, and has higher frequency spectrum efficiency and lower transmission time delay. For example, in a Long Term Evolution (LTE) system and a 5G (New Radio, NR) system, a plurality of terminal devices may directly communicate with each other through a PC5 interface.

The direct communication comprises two resource allocation modes, one is a scheduling resource allocation mode, and the other is an automatic resource selection mode. The scheduling resource allocation mode refers to that the base station schedules resources for direct communication for the terminal equipment of the direct communication through dedicated signaling. The automatic resource selection mode refers to that the base station provides a resource pool for direct communication for the terminal equipment for direct communication, and the terminal equipment selects resources for direct communication from the resource pool.

At present, in a scenario where a terminal device performs Dual Active Stack (DAPS) handover, the terminal device cannot obtain resources for direct communication by using a scheduling resource allocation manner.

Disclosure of Invention

The embodiment of the application provides a resource allocation method and equipment, which realize that a terminal equipment adopts a scheduling resource allocation mode to obtain transmission resources for direct communication in the DAPS switching process.

In a first aspect, an embodiment of the present application provides a resource allocation method, including:

receiving a switching command message sent by a source base station, wherein the switching command message is used for indicating terminal equipment which is in direct communication to carry out DAPS switching;

before the terminal equipment is successfully accessed to a target base station, receiving first scheduling information sent by the source base station, wherein the first scheduling information is used for indicating transmission resources which are configured for the terminal equipment and used for direct communication by the source base station;

and after the terminal equipment is successfully accessed to the target base station, receiving second scheduling information sent by the target base station, wherein the second scheduling information is used for indicating transmission resources which are configured for the terminal equipment and used for direct communication by the target base station.

Optionally, the method further includes:

and after the terminal equipment is successfully accessed to the target base station, continuously receiving the first scheduling information sent by the source base station.

Optionally, after receiving the second scheduling information sent by the target base station, the method further includes:

and stopping detecting the downlink control signaling corresponding to the first scheduling information.

Optionally, the handover command message includes a first RNTI, where the first RNTI is a downlink control signaling scrambling code that is allocated by the target base station for the terminal device and is used for corresponding to the second scheduling information.

Optionally, the method further includes:

and after the terminal equipment is successfully accessed to the target base station, sending indication information to the source base station, wherein the indication information is used for indicating that the terminal equipment is successfully accessed to the target base station.

Optionally, the method further includes:

and after the terminal equipment is successfully accessed to the target base station, sending a first BSR to the source base station, where the first BSR is used to indicate that the data volume of the terminal equipment for direct communication is a preset value 0.

Optionally, the method further includes:

and after the terminal equipment is successfully accessed to the target base station, sending a second BSR to the target base station, wherein the second BSR contains the data volume of the direct communication cached in the hybrid automatic repeat request (HARQ) process of the terminal equipment.

Optionally, the handover command message includes time information, where the time information is used to indicate times at which the terminal device receives the first scheduling information and/or the second scheduling information, respectively.

Optionally, the downlink control signaling corresponding to the first scheduling information is scrambled by a second RNTI, and the second RNTI is allocated to the source base station for the terminal device.

In a second aspect, an embodiment of the present application provides a resource allocation method, including:

sending a switching command message to a terminal device which is in direct communication, wherein the switching command message is used for indicating the terminal device to carry out DAPS switching;

and sending first scheduling information to the terminal equipment, wherein the first scheduling information is used for indicating transmission resources which are configured for the terminal equipment by a source base station and are used for direct communication.

Optionally, the method further includes:

receiving indication information, wherein the indication information is used for indicating that the terminal equipment is successfully accessed to a target base station;

reducing transmission resources configured for the terminal device for direct communication, or stopping configuring transmission resources for the terminal device for direct communication.

Optionally, the receiving the indication information includes:

and receiving the indication information sent by the target base station.

Optionally, the receiving the indication information includes:

and receiving the indication information sent by the terminal equipment.

Optionally, if the configuration of the transmission resource for direct communication for the terminal device is stopped, the method further includes:

and sending first notification information to the target base station, where the first notification information is used to instruct the source base station to stop configuring transmission resources for the terminal device, or is used to instruct the target base station to configure transmission resources for the terminal device.

Optionally, the method further includes:

receiving a first BSR sent by the terminal equipment, wherein the first BSR is used for indicating that the data volume of the terminal equipment for direct communication is a preset value 0;

stopping configuring transmission resources for direct communication for the terminal device.

Optionally, the method further includes:

and if the data volume of the direct communication cached in the HARQ process of the terminal equipment is determined to be 0, sending second notification information to a target base station, wherein the second notification information is used for indicating the target base station to configure transmission resources for the direct communication for the terminal equipment.

Optionally, before sending the handover command message to the terminal device performing direct communication, the method further includes:

receiving a handover request confirmation message sent by a target base station, where the handover request confirmation message includes an RNTI, the RNTI is a downlink control signaling which is allocated by the target base station for the terminal device and used for the target base station to scramble second scheduling information, and the second scheduling information is used for indicating a transmission resource which is configured by the target base station for the terminal device and is used for direct communication;

correspondingly, the handover command message includes the RNTI.

Optionally, the handover request acknowledgement message and the handover command message further include time information, where the time information is used to indicate times at which the terminal device receives the first scheduling information and/or the second scheduling information, respectively.

In a third aspect, an embodiment of the present application provides a resource allocation method, including:

sending a switching request confirmation message to a source base station, wherein the switching request confirmation message is used for indicating the terminal equipment which is in direct communication to carry out DAPS switching;

and after the terminal equipment is successfully accessed to the target base station, sending second scheduling information to the terminal equipment, wherein the second scheduling information is used for indicating transmission resources which are configured for the terminal equipment by the target base station and are used for direct communication.

Optionally, the method further includes:

receiving first notification information sent by the source base station, where the first notification information is sent after the source base station stops configuring transmission resources for direct communication for the terminal device, and is used to instruct the source base station to stop configuring transmission resources for direct communication for the terminal device, or is used to instruct the target base station to configure transmission resources for direct communication for the terminal device.

Optionally, the method further includes:

and receiving second notification information sent by the source base station, wherein the second notification information is sent after the source base station determines that the data volume of the direct communication cached in the HARQ process of the terminal equipment is 0, and is used for indicating the target base station to configure transmission resources for the direct communication for the terminal equipment.

Optionally, the method further includes:

and receiving a BSR sent by the terminal equipment, wherein the BSR contains the data volume of the direct communication cached in the hybrid automatic repeat request (HARQ) process of the terminal equipment.

Optionally, the handover request acknowledgement message includes an RNTI, and the RNTI is a downlink control signaling that is allocated by the target base station for the terminal device and is used for scrambling the second scheduling information.

Optionally, the handover request acknowledgement message further includes time information, where the time information is used to indicate a time when the terminal device receives the first scheduling information and/or the second scheduling information, and the first scheduling information is a transmission resource that is sent to the terminal device by the source base station and is used to indicate that the source base station is configured for the terminal device and is used for direct communication.

In a fourth aspect, an embodiment of the present application provides a terminal device, including:

a receiving module, configured to receive a handover command message sent by a source base station, where the handover command message is used to instruct a terminal device performing direct communication to perform DAPS handover;

the receiving module is further configured to receive first scheduling information sent by the source base station before the terminal device successfully accesses the target base station, where the first scheduling information is used to indicate a transmission resource configured for the terminal device by the source base station and used for direct communication;

the receiving module is further configured to receive second scheduling information sent by the target base station after the terminal device successfully accesses the target base station, where the second scheduling information is used to indicate a transmission resource configured for the terminal device by the target base station and used for direct communication.

Optionally, the receiving module is further configured to:

Optionally, the apparatus further includes a processing module, where the processing module is configured to:

and after the receiving module receives second scheduling information sent by the target base station, stopping detecting the downlink control signaling corresponding to the first scheduling information.

Optionally, the system further includes a sending module, where the sending module is configured to:

and after the terminal equipment successfully accesses the target base station, sending a first BSR to the source base station, where the first BSR is used to indicate that the data volume of the terminal equipment for direct communication is a preset value 0.

In a fifth aspect, an embodiment of the present application provides a source base station, including:

a sending module, configured to send a handover command message to a terminal device performing direct communication, where the handover command message is used to instruct the terminal device to perform DAPS handover;

the sending module is further configured to send first scheduling information to the terminal device, where the first scheduling information is used to indicate a transmission resource configured by a source base station for the terminal device and used for direct communication.

Optionally, the system further comprises a receiving module and a processing module;

the receiving module is configured to receive indication information, where the indication information is used to indicate that the terminal device successfully accesses a target base station;

the processing module is configured to reduce the transmission resource configured for the terminal device and used for direct communication, or stop configuring the transmission resource for the terminal device and used for direct communication.

Optionally, the receiving module is specifically configured to:

and receiving the indication information sent by the target base station.

Optionally, the receiving module is specifically configured to:

and receiving the indication information sent by the terminal equipment.

Optionally, if the processing module stops configuring the transmission resource for direct communication for the terminal device, the sending module is further configured to:

Optionally, the receiving module is further configured to receive a first BSR sent by the terminal device, where the first BSR is used to indicate that a data volume of the terminal device for performing direct communication is a preset value 0;

the processing module is further configured to stop configuring transmission resources for direct communication for the terminal device.

Optionally, the system further comprises a processing module; the sending module is further configured to:

if the processing module determines that the data volume of the direct communication cached in the HARQ process of the terminal device is 0, sending second notification information to a target base station, where the second notification information is used to indicate that the target base station configures transmission resources for the direct communication for the terminal device.

Optionally, the apparatus further includes a receiving module, where the receiving module is further configured to:

before the sending module sends a handover command message to a terminal device which is in direct communication, receiving a handover request confirmation message sent by a target base station, wherein the handover request confirmation message comprises an RNTI (radio network temporary identifier), the RNTI is a downlink control signaling which is allocated by the target base station for the terminal device and is used for scrambling a second scheduling information corresponding to the target base station, and the second scheduling information is used for indicating a transmission resource which is configured by the target base station for the terminal device and is used for direct communication;

correspondingly, the handover command message includes the RNTI.

In a sixth aspect, an embodiment of the present application provides a target base station, including:

a sending module, configured to send a handover request acknowledgement message to a source base station, where the handover request acknowledgement message is used to indicate a terminal device performing direct communication to perform DAPS handover;

the sending module is further configured to send second scheduling information to the terminal device after the terminal device successfully accesses the target base station, where the second scheduling information is used to indicate a transmission resource configured for the terminal device by the target base station and used for direct communication.

Optionally, the sending module is further configured to:

Optionally, the apparatus further includes a receiving module, where the receiving module is configured to:

Optionally, the sending module is further configured to:

In a seventh aspect, an embodiment of the present application provides a terminal device, including: a processor, a memory, and a transceiver; the transceiver is used for communicating with other equipment; the memory to store instructions; the processor is configured to execute the instructions stored in the memory to perform the method provided in any embodiment of the first aspect of the present application.

In an eighth aspect, an embodiment of the present application provides a source base station, including: a processor, a memory, and a transceiver; the transceiver is used for communicating with other equipment; the memory to store instructions; the processor is configured to execute the instructions stored in the memory to perform the method provided in any embodiment of the first aspect of the present application.

In a ninth aspect, an embodiment of the present application provides a target base station, including: a processor, a memory, and a transceiver; the transceiver is used for communicating with other equipment; the memory to store instructions; the processor is configured to execute the instructions stored in the memory to perform the method provided in any embodiment of the first aspect of the present application.

In a tenth aspect, an embodiment of the present application provides a storage medium, including: a readable storage medium and a computer program for implementing the method provided in any embodiment of the first aspect of the present application.

The embodiment of the application provides a resource allocation method and equipment, wherein terminal equipment receives a switching command message sent by a source base station, the switching command message is used for indicating the terminal equipment which is in direct communication to perform DAPS switching, before the terminal equipment is successfully accessed into a target base station, first scheduling information sent by the source base station is received, the first scheduling information is used for indicating transmission resources which are configured for the terminal equipment by the source base station and are used for direct communication, after the terminal equipment is successfully accessed into the target base station, second scheduling information sent by the target base station is received, and the second scheduling information is used for indicating the transmission resources which are configured for the terminal equipment by the target base station and are used for direct communication. The method and the device realize that the terminal equipment acquires the transmission resources for direct communication by adopting a scheduling resource allocation mode in the DAPS switching process through the first scheduling information sent by the source base station and the second scheduling information sent by the target base station.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is an architecture diagram of a communication system to which an embodiment of the present application is applicable;

FIG. 2 is a schematic diagram of an architecture for V2X communication;

fig. 3 is a message interaction diagram of a DAPS handover according to an embodiment of the present application;

fig. 4 is a message interaction diagram of a resource allocation method according to an embodiment of the present application;

fig. 5 is another message interaction diagram of a resource allocation method according to an embodiment of the present application;

fig. 6 is another message interaction diagram of a resource allocation method according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a source base station according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a target base station according to an embodiment of the present application;

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

fig. 11 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Fig. 1 is an architecture diagram of a communication system to which an embodiment of the present application is applicable. As shown in fig. 1, a communication system may include a terminal device, a source base station, and a target base station. The embodiment of the present application does not limit the names and numbers of the devices. For example, a base station may also be referred to as a network device. The source base station may be referred to as a source network device and the target base station may be referred to as a target network device. The source base station and the target base station respectively have certain coverage ranges and respectively manage a certain number of cells. The coverage areas of the source base station and the target base station may have an overlapping area. And the terminal equipment positioned in the coverage area of the source base station can communicate with the source base station in a wireless mode. And the terminal equipment positioned in the coverage area of the target base station can communicate with the target base station in a wireless mode. And the terminal equipment positioned in the overlapping area can communicate with the source base station and/or the target base station in a wireless mode. In terms of communication between the source base station and the terminal device, when the source base station is a sender, downlink information may be transmitted to the terminal device. Accordingly, the terminal device serves as a receiver and can receive the downlink information sent by the source base station. When the terminal device is a sender, the uplink information may be transmitted to the source base station. Accordingly, the source base station serves as a receiver and can receive uplink information sent by the terminal device. The terminal device may be fixed in position or movable. Alternatively, the terminal device may support direct communication. The terminal equipment performing direct communication may be within the coverage of the base station or may be outside the coverage of the base station.

Illustratively, in fig. 1, the coverage area of the source base station includes 3 terminal devices, which are a first terminal device, a second terminal device and a fourth terminal device, respectively. The third terminal device is located outside the coverage area of the source base station and the target base station. For clarity, the wireless communication interface between the base station and the terminal device may be referred to as the first air interface. Optionally, the first air interface may be a Uu interface. The communication interface for direct communication between different terminal devices may be referred to as a second air interface. Optionally, the second air interface may be a Sidelink (SL), or referred to as a PC5 interface. In fig. 1, direct communication may be performed between a first terminal device and a second terminal device, and between the first terminal device and a third terminal device.

The embodiment of the present application does not limit a Radio Access Technology (RAT) used by the base station and the terminal device. For example, it may be an LTE system, an LTE evolved system (LTE-Advanced), a 5G system, etc.

The base station related in this embodiment is a device that accesses a terminal device to a wireless network, and may be an evolved node B (eNB or eNodeB) in LTE, or a relay station or an access point, or a base station in a 5G network, such as a new radio controller (NR controller), a centralized network element (centralized unit), a distributed network element (distributed unit), or any other device, which is not limited in this embodiment of the present invention.

The terminal device in the embodiments of the present application is a device having a direct communication capability and capable of providing voice and/or data connectivity to a user, for example, a handheld device, an on-board device, a roadside unit, and the like having a wireless connection function. Common terminal devices include: mobile phones, tablet computers, notebook computers, palmtop computers, wearable devices (e.g., smart watches, smart bracelets, etc.), pedometers, and the like.

The following briefly introduces direct communication.

Different from a mode that communication data is received or sent through a base station in a traditional communication system, the direct communication adopts a mode of direct terminal-to-terminal communication, and the frequency spectrum efficiency is higher and the transmission delay is lower. Based on direct communication, the third Generation Partnership project (3 gpp) also supports vehicle to evolution (V2X) communication technologies, and an "X" in V2X may represent a different communication target. For example, fig. 2 is a schematic diagram of an architecture of V2X communication. As shown in fig. 2, the V2X communication may include vehicle to vehicle (V2V) communication, vehicle to roadside infrastructure (V2I) communication, vehicle to network (V2N) communication, and vehicle to pedestrian (V2P) communication. In V2X communication, V2X traffic may be transmitted through SL or Uu ports. Illustratively, the roadside infrastructure may be a roadside unit (RSU). In practical application, V2X can realize typical application scenes such as information service, traffic safety, traffic efficiency and the like by means of all-around connection and high-efficiency information interaction between the V2X and platforms such as people, vehicles, roads and cloud platforms. For example, the internet of vehicles terminal can obtain various information services including traffic light information, nearby area vehicle information, vehicle navigation, emergency rescue, infotainment services, etc. through V2I and V2N communication. The vehicle speed, position, driving condition, pedestrian activity and other information of surrounding vehicles can be acquired in real time through V2V and V2P communication, and the collision early warning function is realized through an intelligent algorithm, so that traffic accidents are avoided.

Next, a concept related to the embodiment of the present application will be explained.

1. Out of Coverage (OOC), in Coverage (IC)

A terminal device performing direct communication is referred to as an in-coverage scenario when located within the coverage of a base station, and is referred to as an out-of-coverage scenario when located outside the coverage of the base station. For example, in fig. 1, the first terminal device and the second terminal device are in-coverage scenes, and the third terminal device is in-coverage scenes.

In an in-coverage scenario, a connection or a connection may be established or maintained between the terminal device and the base station, the terminal device is in a Radio Resource Control (RRC) connected state, or no RRC connection is established between the terminal device and the base station. In the out-of-coverage scenario, no RRC connection is established between the terminal device and the base station.

2. Resource allocation patterns

In the direct communication, the mode for the terminal device to acquire the transmission resource for the direct communication may include a scheduled resource allocation mode (scheduled resource allocation) and an automatic resource selection mode (automatic resource selection).

In the scheduling resource allocation mode, the transmission resource for the terminal device to perform direct communication is configured by the base station through dedicated signaling, and the terminal device is in an RRC connected state. For example, the base station may schedule transmission resources for direct communication for the terminal device through RRC signaling or Downlink Control Information (DCI).

In the automatic resource selection mode, the base station may provide the terminal device with a resource pool for direct communication through system messages or RRC signaling. The terminal device selects resources for direct communication from the resource pool. For example, a terminal device not within the network coverage area may select resources for direct communication from a pre-configured resource pool in an automatic resource selection manner.

Optionally, the scheduling resource allocation manner may be referred to as mode1 (mode 1) or mode3 (mode 3), and the automatic resource selection manner may be referred to as mode2 (mode 2) or mode4 (mode 4).

3. DAPS handover

In a conventional handover procedure, after receiving a handover command message, a terminal device interrupts communication with a source cell or a source base station, and then initiates random access in a target cell to access the target cell or the target base station. And the terminal equipment cannot receive the signaling and the data sent by the source base station or the target base station within the period from the time when the terminal equipment receives the switching command message to the time when the terminal equipment is successfully accessed into the target cell.

In the DAPS handover, for downlink Data transmission, for a Data Radio Bearer (DRB) to which the DAPS handover is applied, a source base station needs to uniformly allocate a Packet Data Convergence Protocol (PDCP) SN to a PDCP packet, and then send a part of the packet and a corresponding SN to a target base station, and the target base station sends the part of the packet to a terminal device during the DAPS handover. The data packet sent by the target base station adopts a security algorithm and a header compression algorithm of a target side. And the source base station executes header compression and a security algorithm of the source side aiming at the other part of the data packets of the DRB, and then sends the data packets to the terminal equipment.

Correspondingly, the terminal equipment receives the data packets respectively sent by the source base station and the target base station, analyzes the data packets by adopting a corresponding security algorithm and a header compression algorithm according to different receiving sources, obtains complete and ordered data packets by uniformly ordering the data packets, and submits the ordered data packets to a high layer.

In the DAPS handover, for uplink data transmission, for a DRB to which the DAPS handover is applied, in the DAPS handover process, the terminal device uniformly allocates PDCP SNs to data packets, part of the data packets are sent to the source base station through the source link, and part of the data packets are sent to the target base station through a new link. According to different sending objects, the terminal equipment adopts different security algorithms and header compression algorithms for the data packets. For example, for a data packet transmitted through a source link, processing needs to be performed according to a security algorithm and a header compression algorithm on the source base station side; for the data packet transmitted through the new link, the processing is required according to the security algorithm and the header compression algorithm of the target base station side.

Next, a brief description will be given of a message flow of the DAPS handover with reference to fig. 3. Fig. 3 is a message interaction diagram of DAPS handover according to an embodiment of the present application. The execution body relates to the terminal device, the source base station and the target base station.

It is assumed that the terminal device needs to switch cells due to movement. And the source base station determines a target cell (governed by the target base station) switched by the terminal equipment according to the measurement report reported by the terminal equipment. As shown in fig. 3, the handover procedure may include:

s301, the source base station sends a Handover Request message (Handover Request) to the target base station.

Correspondingly, the target base station receives the handover request message sent by the source base station.

Optionally, the handover request message may include: UE context information and related information of V2X services. Optionally, the UE context information may include: the current data radio bearer established by the terminal equipment, the capability information of the terminal equipment, the radio parameters distributed to the terminal equipment by the source base station, and the like. Optionally, the information related to the V2X service may include: service characteristics of the V2X service, target terminal equipment for the terminal equipment to develop the V2X service, and the like.

S302, the target base station performs admission control (admission control).

The target base station determines whether to allow the terminal device to access. If the terminal device is allowed to access, the target base station allocates necessary wireless resources for the terminal device. And, the target base station determines that the terminal device is developing the V2X service according to the handover request message, so the target base station configures relevant parameters required for developing the V2X service, for example, a time slot in which direct communication is located, for the terminal device at the same time. Optionally, the related parameters may further include an Exceptional resource pool (explicit resource pool) for direct communication. The special resource pool is generally shared by a plurality of terminal apparatuses, and is a transmission resource pool configured by a cell for a terminal apparatus in a specific state. Alternatively, the particular state includes, but is not limited to: when the terminal device initially accesses the network, the terminal device does not yet obtain a common resource pool (normal resource pool), the terminal device in a connected state has a radio link failure, and the terminal device is performing a random access process with a target cell in a handover process.

The above parameters are all fed back to the source base station through the handover request acknowledgement message in S303.

The target base station may configure the DAPS handover for the terminal device, for example, the target base station configures the DAPS handover for one or more DRBs established by the terminal device.

S303, the target base station sends a Handover Request acknowledge message (Handover Request ACK) to the source base station.

Correspondingly, the source base station receives the switching request confirmation message sent by the target base station.

S304, the source base station sends RRC reconfiguration information to the terminal equipment.

Correspondingly, the terminal equipment receives the RRC reconfiguration message sent by the source base station.

In this step, the RRC reconfiguration message may also be referred to as a Handover Command message (Handover Command). The RRC reconfiguration message may include all or part of the contents of the handover request confirm message in S303.

S305, the terminal equipment initiates random access (random access) to the target base station.

And after receiving the switching command message, the terminal equipment determines that the target base station is configured with DAPS switching. For the DRB configured with DAPS handover, the terminal device needs to establish a new RLC entity and MAC entity, so that the terminal device can transmit the data packet of the DRB with the source base station and the target base station during handover.

After that, the terminal device starts to perform random access in the target cell.

Optionally, after receiving the handover command message, the terminal device may continue to detect a Radio Link Monitor (Radio Link Monitor) of the source cell.

S306, the terminal device sends an RRC Reconfiguration Complete message (RRC Reconfiguration Complete) to the target base station.

When the terminal device succeeds in random access in the target cell, for example, receives the MSG4 for conflict resolution in the 4-step random access process, or receives the MSGB for successful random access in the two-step random access process, the terminal device sends an RRC reconfiguration complete message to the target base station. At this time, the terminal device no longer performs radio link detection of the source cell. However, the terminal device continues to receive downlink data from the source cell and perform uplink transmission according to the uplink grant, until the target cell notifies the terminal device to release the source cell through RRC signaling, the terminal device will release all configurations of the source cell and stop data transmission with the source cell.

Embodiments of the present application are described below with reference to the drawings.

The terms "first" and "second" in this application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged where appropriate.

Fig. 4 is a message interaction diagram of a resource allocation method according to an embodiment of the present application. The execution subject of the resource configuration method provided by the embodiment relates to a terminal device, a source base station and a target base station. As shown in fig. 4, the resource allocation method provided in this embodiment may include:

s401, the target base station sends a switching request confirmation message to the source base station, wherein the switching request confirmation message is used for indicating the terminal equipment which is in direct communication to carry out DAPS switching.

The DAPS handover may refer to the above description of the present application, and the handover request acknowledgement message may refer to S303 in fig. 3, which have similar principles and are not described herein again.

It should be noted that, in this embodiment, specific content included in the handover request acknowledgement message is not limited.

Optionally, the handover request confirm message may include a first Radio Network Temporary Identity (RNTI). The first RNTI is allocated by the target base station for the terminal equipment and is used for scrambling downlink control signaling (DCI) corresponding to the second scheduling information. The second scheduling information is see S404.

In this embodiment, for convenience of differentiation, the RNTI allocated by the target base station to the terminal device is referred to as a first RNTI.

S402, the source base station sends a switching command message to the terminal equipment which is in direct communication, and the switching command message is used for indicating the terminal equipment to carry out DAPS switching.

Correspondingly, the terminal equipment receives the switching command message sent by the source base station.

The handover command message can be referred to as S304 in fig. 3, and the principle is similar, which is not described herein again.

After receiving the handover command message, the terminal device initiates a random access procedure to the target base station, see S305 in fig. 3, which has similar principles and is not described herein again.

It should be noted that, the present embodiment does not limit the specific content included in the handover command message.

Optionally, the handover command message may include the first RNTI.

S403, the source base station sends first scheduling information to the terminal equipment.

The first scheduling information is used for indicating transmission resources configured for the terminal equipment by the source base station and used for direct communication.

Correspondingly, before the terminal equipment is successfully accessed to the target base station, the terminal equipment receives the first scheduling information sent by the source base station.

Specifically, in the DAPS handover process, the terminal device receives a handover command message sent by the source base station, and initiates random access to the target cell or the target base station. The terminal device may transmit data with the source base station before the target base station informs the terminal device to release the source cell. After the source base station sends the switching command message to the terminal equipment, first scheduling information can be generated, and transmission resources for direct communication are allocated to the terminal equipment in a scheduling resource allocation mode in the DAPS switching process by sending the first scheduling information to the terminal equipment.

Optionally, the downlink control signaling corresponding to the first scheduling information is scrambled by a second RNTI, and the second RNTI is allocated to the terminal device by the source base station.

In this embodiment, for convenience of differentiation, the RNTI allocated by the source base station to the terminal device is referred to as a second RNTI.

S404, after the terminal equipment in direct communication successfully accesses the target base station, the target base station sends second scheduling information to the terminal equipment. The second scheduling information is used for indicating the transmission resources configured for the terminal equipment by the target base station for direct communication.

Correspondingly, after the terminal equipment successfully accesses the target base station, the terminal equipment receives second scheduling information sent by the target base station.

Specifically, in the DAPS handover process, the terminal device receives a handover command message sent by the source base station, and initiates random access to the target cell or the target base station. After the terminal device successfully accesses the target cell or the target base station, the terminal device can transmit data with the target base station. Therefore, for the terminal device performing direct communication, after the terminal device successfully accesses the target base station, the target base station may generate the second scheduling information and send the second scheduling information to the terminal device, thereby implementing allocation of transmission resources for direct communication to the terminal device by using a scheduling resource allocation manner in the DAPS handover process.

It should be noted that the following application scenarios may exist: after the terminal device successfully accesses the target cell or the target base station, the first scheduling information sent by the source base station and the second scheduling information sent by the target base station are received. In this embodiment, the transmission resource used by the terminal device for direct communication is not limited, and the transmission resource indicated by the first scheduling information and/or the second scheduling information may be used. Optionally, in an implementation manner, in order to ensure quality of service transmission and reduce interference, the terminal device may only use the transmission resource indicated by the second scheduling information, and does not use the transmission resource indicated by the first scheduling information.

As can be seen, in the resource configuration method provided in this embodiment, in the DAPS handover process, before the terminal device performing direct communication successfully accesses the target cell or the target base station, the source base station sends the first scheduling information to the terminal device all the time, and allocates the transmission resource for direct communication to the terminal device. Correspondingly, the terminal equipment carries out direct communication according to the transmission resource indicated by the first scheduling information. And after the terminal equipment is successfully accessed into the target cell or the target base station, the target base station sends second scheduling information to the terminal equipment and allocates transmission resources for direct communication for the terminal equipment. At this time, the terminal device may perform direct communication according to the transmission resource indicated by the second scheduling information sent by the target base station, and/or perform direct communication according to the transmission resource indicated by the first scheduling information sent by the source base station. For an application scenario in which a terminal device cannot acquire transmission resources in a scheduling resource allocation manner in a handover process in the prior art, the resource allocation method provided in this embodiment achieves acquisition of transmission resources for direct communication in a scheduling resource allocation manner in a DAPS handover process. For an application scenario in which a terminal device performs direct communication by using a special resource pool configured by a target base station during a DAPS handover in the prior art, the resource configuration method provided in this embodiment not only achieves that a scheduling resource allocation manner is used to obtain transmission resources for direct communication in the DAPS handover process, but also avoids interference and collision caused by that multiple terminal devices perform direct communication by using resources in the special resource pool at the same time, improves data transmission quality, and improves spectrum efficiency of the entire system.

Optionally, the handover request confirm message in S401 and the handover command message in S402 may further include time information. The time information is used for indicating the time when the terminal equipment respectively receives the first scheduling information and/or the second scheduling information.

Specifically, the detection capability of the terminal device for the downlink control signaling corresponding to the scheduling information (including the first scheduling information and the second scheduling information) is usually limited, for example, the maximum downlink control signaling blind detection capability is 44 times. In this embodiment, the terminal device may detect DCI (Downlink Control Information) corresponding to the first scheduling Information and DCI corresponding to the second scheduling Information at the same time, which may cause a technical problem that the DCI blind detection capability of the terminal device is insufficient. The time for the terminal equipment to receive the first scheduling information and the time for the terminal equipment to receive the second scheduling information are definitely indicated through the time information, the time for the terminal equipment to detect the DCI corresponding to the first scheduling information is staggered with the time for detecting the DCI corresponding to the second scheduling information, the problem of insufficient blind detection capability of the terminal equipment is solved, and the detection efficiency of the terminal equipment is improved.

The implementation manner of the time information is not limited in this embodiment, and may be different according to the type of the communication system, the basic time domain unit in the communication system, the transmission manner of the first scheduling information or the second scheduling information, and other factors.

Optionally, the time information may indicate a time slot for the terminal device to receive the first scheduling information, and/or a time slot for receiving the second scheduling information. For example, when a radio frame includes 10 slots, the slot numbers are 0 to 9. The time information may instruct the terminal device to receive the first scheduling information in the first 5 time slots; or, the time information may instruct the terminal device to receive the second scheduling information in the last 5 time slots; alternatively, the time information may instruct the terminal device to receive the first scheduling information in the first 5 time slots and the second scheduling information in the last 5 time slots.

Optionally, the time information may indicate a detection period and an offset of DCI corresponding to the first scheduling information and/or the second scheduling information. The offset represents a time domain position within the detection period.

In this embodiment, for convenience of distinction, the time information included in the handover request acknowledgement message and the handover command message may be referred to as first time information, and the first time information is determined by the target base station.

Optionally, before S401, the resource configuration method provided in this embodiment may further include:

the source base station sends a switching request message to the target base station. Correspondingly, the target base station receives the handover request message sent by the source base station.

The handover request message may refer to S301 in fig. 3, and the principle is similar, which is not described herein again.

Optionally, the handover request message may include the second time information. The second time information is used for indicating the time when the terminal device receives the first scheduling information and/or the second scheduling information respectively, and the second time information is determined by the source base station.

Specifically, the source base station and the target base station may negotiate a time when the terminal device receives the first scheduling information and/or the second scheduling information. And the source base station informs the target base station of the second time information by carrying the second time information in the switching request message. The target base station may finally determine the first time information according to the second time information. Through negotiation, the flexibility of processing and the effectiveness of time information are improved.

The second time information is similar to the first time information in implementation manner, and is not described herein again.

Optionally, the resource configuration method provided in this embodiment may further include:

Specifically, in this implementation manner, the source base station will continue to send the first scheduling information for a period of time after sending the handover command message to the terminal device. The period of time is greater than the time interval from the reception of the handover command message by the terminal device to the successful access to the target base station. Accordingly, the terminal device may continue to receive the first scheduling information sent by the source base station after successfully accessing the target base station. The source base station continues to configure the transmission resource for the terminal equipment for direct communication after the terminal equipment is successfully accessed to the target base station, so that the continuity of the V2X service performed by the terminal equipment is improved.

Optionally, after receiving the second scheduling information sent by the target base station in S404, the resource configuration method provided in this embodiment may further include:

Specifically, no matter whether the source base station sends the first scheduling information after the terminal device successfully accesses the target base station, as long as the terminal device receives the second scheduling information sent by the target base station (including trying to receive the second scheduling information sent by the target base station), the terminal device stops detecting the downlink control signaling corresponding to the first scheduling information, and the terminal device performs direct communication according to the transmission resource indicated by the second scheduling information, so that the power consumption of the terminal is saved.

Based on the embodiment shown in fig. 4, fig. 5 is another message interaction diagram of the resource allocation method provided in the embodiment of the present application. As shown in fig. 5, the resource allocation method provided in this embodiment, after the terminal device successfully accesses the target base station, may further include:

s501, the source base station receives indication information. The indication information is used for indicating the terminal equipment to successfully access the target base station.

S502, the source base station reduces the transmission resource configured for the terminal device for direct communication, or the source base station stops configuring the transmission resource for the terminal device for direct communication.

Specifically, the source base station determines that the terminal device successfully accesses the target base station by receiving the indication information. Generally, after the terminal device successfully accesses the target base station, the target base station configures transmission resources for direct communication for the terminal device. The source base station reduces the transmission resources for direct communication configured for the terminal equipment, or the source base station stops configuring the transmission resources for direct communication for the terminal equipment, so that the transmission resources for direct communication are prevented from being configured for the terminal equipment on both sides of the source base station and the target base station, resource waste is avoided, and the resource utilization rate is improved.

Optionally, the indication information may be further used to indicate at least one of the following: and the target base station configures the transmission resources for the direct communication for the terminal equipment, or the source base station stops configuring the transmission resources for the direct communication for the terminal equipment.

It should be noted that the execution sequence of S501 and S404 in fig. 4 is not limited in this embodiment.

Optionally, in an implementation manner, after the terminal device successfully accesses the target base station, the method may further include:

and the target base station sends the indication information to the source base station.

Correspondingly, in S501, the receiving, by the source base station, the indication information may include:

and the source base station receives the indication information sent by the target base station.

Specifically, in this implementation manner, the target base station may identify the terminal device in a process of initiating the random access by the terminal device. For example, when the terminal device initiates random access, a dedicated Preamble (Preamble) configured for the terminal device by the target base station is used, or the target base station identifies through the identification information of the terminal device. After the terminal device successfully accesses the target base station, the target base station may send indication information to the source base station, so as to notify the source base station that the terminal device successfully accesses the target base station.

Optionally, in another implementation manner, after the terminal device successfully accesses the target base station, the method may further include:

and the terminal equipment sends the indication information to the source base station.

and the source base station receives the indication information sent by the terminal equipment.

Optionally, if, in S502, the source base station stops configuring the transmission resource for direct communication for the terminal device, the resource configuration method provided in this embodiment may further include:

s503, the source base station sends first notification information to the target base station. The first notification information is used for instructing the source base station to stop configuring the transmission resource for the terminal device for direct communication, or is used for instructing the target base station to configure the transmission resource for the terminal device for direct communication.

Correspondingly, the target base station receives the first notification information sent by the source base station.

The source base station sends the first notification information to the target base station, so that the target base station can allocate transmission resources for direct communication to the terminal equipment in time, and the resource allocation effect of a scheduling resource allocation mode is ensured.

Optionally, on the basis of the embodiment shown in fig. 4 or fig. 5, fig. 6 is another message interaction diagram of the resource configuration method provided in the embodiment of the present application. As shown in fig. 6, the resource allocation method provided in this embodiment, after the terminal device successfully accesses the target base station, may further include:

s601, the terminal device sends a first Buffer Status Report (BSR) to the source base station. The first BSR is configured to indicate that a data volume of the terminal device for performing direct communication is a preset value 0.

Correspondingly, the source base station receives the first BSR sent by the terminal device.

The preset value 0 is used for instructing the source base station to stop configuring transmission resources for the terminal device for direct communication.

S602, the source base station stops configuring transmission resources for direct communication for the terminal device.

Therefore, the first BSR sent to the source base station by the terminal device is the preset value 0, and the source base station can stop configuring the transmission resource for direct communication for the terminal device after receiving the preset value, so that the situation that the transmission resource for direct communication is configured for the terminal device on both sides of the source base station and the target base station is avoided, resource waste is avoided, and the resource utilization rate is improved.

Optionally, on the basis of any embodiment of fig. 4 to fig. 6, after the terminal device successfully accesses the target base station, the resource configuration method provided in this embodiment may further include:

and the terminal equipment sends the second BSR to the target base station. The second BSR includes the amount of data of direct communication buffered in the HARQ process of the terminal device.

And the target base station can timely and accurately allocate transmission resources for direct communication to the terminal equipment according to the second BSR, so that the allocation accuracy of the transmission resources is improved, and the service quality of the direct communication is improved.

and if the source base station determines that the data volume of the direct communication cached in the HARQ process of the terminal equipment is 0, sending second notification information to the target base station. And the second notification information is used for indicating the target base station to configure transmission resources for the terminal equipment for direct communication.

Correspondingly, the target base station receives the second notification information sent by the source base station.

This is illustrated by way of example in connection with fig. 1.

Assume that a first terminal device (which may be referred to as TxUE) in fig. 1 is in DAPS handover. As an example, one application scenario may be: the TxUE has established an RRC connection in the source cell (governed by the source base station). And the TxUE develops the V2X service. The TxUE transmits V2X service 1 (V2X service 1) to a second terminal device (which may be referred to as UE 1), and a direct link between the TxUE and UE1 is referred to as SL1. The TxUE transmits V2X service 2 (V2X service 2) and V2X service 3 (V2X service 3) to a third terminal device (which may be referred to as UE 2), and the direct link between the Tx UE and UE2 is referred to as SL2. Optionally, different V2X services may have different or the same Quality of Service (QoS) requirements, which may include, but are not limited to, at least one of the following parameters: priority, transmission delay, and transmission bit error rate. The source base station may allocate transmission resources for direct communication to the Tx UE through the DCI. Optionally, the source base station may configure direct communication with Hybrid Automatic Repeat reQuest (HARQ) feedback. At this time, taking UE1 as an example, after receiving data of V2X service 1 transmitted by TxUE, UE1 needs to feed back ACK/NACK to Tx UE, and Tx UE transmits ACK/NACK fed back by UE1 to the source base station.

The Tx UE may Process different direct data transmissions with different HARQ processes (SL HARQ processes).

For example, the TX UE stores direct data transmitted to UE1 using SL HARQ Process 1. In one direct transmission, the TX UE transmits 300 bits of direct data to UE1, and the 300 bits of data are also stored in SL HARQ process 1. When configuring the V2X service 1 with HARQ feedback, if the Tx UE receives acknowledgement information (ACK) of UE1, the Tx UE may clear data in SL HARQ process 1; alternatively, when V2X service 1 is configured without HARQ feedback, the Tx UE needs to wait for the maximum number of retransmissions (e.g. 4) before flushing the data in SL HARQ process 1.

For UE2, the Tx UE may process the direct data to be transmitted using SL HARQ process2 and/or SL HARQ process 3.

In the DAPS handover procedure, after the transmission resource for direct communication is originally configured by the source base station as the SL HARQ process of the Tx UE, the transmission resource for direct communication may be configured by the target base station after the Tx UE successfully accesses the target base station. If there is no data to be retransmitted in the SL HARQ process when the Tx UE is allocated transmission resources by the target base station, the transmission resources allocated by the target base station may be used for new direct data transmission, and the Tx UE may implement handover smoothly. If the Tx UE allocates transmission resources from the target base station, the SL HARQ process still has data to be retransmitted, and the target base station does not know that the SL HARQ process still has data to be retransmitted, so the transmission resources allocated by the target base station are probably not suitable for the data currently buffered in the SL HARQ process to be retransmitted, for example, the amount of allocated transmission resources is too small to transmit the buffered data, the Tx UE will empty the data currently buffered in the SL HARQ process to buffer new direct data, which may cause the UE1 or UE2 not to obtain the buffered data, resulting in data loss and affecting the performance of direct communication.

Therefore, after the source base station sends the handover command message to the Tx UE, if the source base station can determine that the amount of the directly communicated data buffered in the HARQ process of the terminal device is 0, at this time, the Tx UE may empty the data in the SL HARQ process. The source base station may send the second notification information to the target base station to notify the target base station to start allocating transmission resources for the Tx UE, thereby avoiding data loss and improving performance of direct communication.

Optionally, the determining, by the source base station, that the amount of data of the direct communication buffered in the HARQ process of the terminal device is 0 may include: and the source base station determines that the amount of the data of the direct communication cached in the HARQ process of the terminal equipment is less than a preset threshold value. In this embodiment, the value of the preset threshold is not limited, and may be a value with a small value, which is as close to 0 as possible.

In a scenario where direct communication is configured with HARQ feedback, the source base station may determine whether the amount of data of direct communication buffered in the HARQ process of the terminal device is 0 according to the transmission resource history information currently allocated to the Tx UE and the HARQ feedback information forwarded by the Tx UE. In a scenario where direct communication is configured without HARQ feedback, the source base station may determine whether the amount of data of direct communication buffered in the HARQ process of the terminal device is 0 according to whether the data in the SL HARQ process reaches the maximum retransmission number.

Fig. 7 is a schematic structural diagram of a terminal device according to an embodiment of the present application. As shown in fig. 7, the terminal device provided in this embodiment may include:

a receiving module 71, configured to receive a handover command message sent by a source base station, where the handover command message is used to instruct a terminal device performing direct communication to perform DAPS handover;

the receiving module 71 is further configured to receive first scheduling information sent by the source base station before the terminal device successfully accesses the target base station, where the first scheduling information is used to indicate a transmission resource configured for the terminal device by the source base station and used for direct communication;

the receiving module 71 is further configured to receive second scheduling information sent by the target base station after the terminal device successfully accesses the target base station, where the second scheduling information is used to indicate a transmission resource configured for the terminal device by the target base station and used for direct communication.

Optionally, a processing module 72 is also included. A processing module 72, configured to initiate random access to the target base station after the receiving module 71 receives the handover command message sent by the source base station;

optionally, the receiving module 71 is further configured to:

Optionally, the apparatus further includes a processing module 72, where the processing module 72 is configured to:

after the receiving module 71 receives the second scheduling information sent by the target base station, the detection of the downlink control signaling corresponding to the first scheduling information is stopped.

Optionally, the handover command message includes a first radio RNTI, where the first RNTI is a downlink control signaling scrambling code that is allocated by the target base station for the terminal device and is used for corresponding to the second scheduling information.

Optionally, the system further includes a sending module 73, where the sending module 73 is configured to:

Optionally, a sending module 73 is further included, where the sending module 73 is configured to:

and after the terminal equipment successfully accesses the target base station, sending a second BSR to the target base station, wherein the second BSR contains the data volume of the direct communication cached in the HARQ process of the terminal equipment.

The terminal device provided in this embodiment is configured to execute operations executed by the terminal device in the method embodiment of the present application, and the principles are similar, and are not described here again.

Fig. 8 is a schematic structural diagram of a source base station according to an embodiment of the present application. As shown in fig. 8, the source base station provided in this embodiment may include:

a sending module 81, configured to send a handover command message to a terminal device performing direct communication, where the handover command message is used to instruct the terminal device to perform DAPS handover;

the sending module 81 is further configured to send first scheduling information to the terminal device, where the first scheduling information is used to indicate a transmission resource configured by a source base station for the terminal device and used for direct communication.

Optionally, a processing module 82 is further included; a processing module 82, configured to generate first scheduling information before the sending module 81 sends the first scheduling information to the terminal device;

optionally, a receiving module 83 and a processing module 82 are further included;

the receiving module 83 is configured to receive indication information, where the indication information is used to indicate that the terminal device successfully accesses the target base station;

the processing module 82 is configured to reduce the transmission resources configured for the terminal device for direct communication, or stop configuring the transmission resources for the terminal device for direct communication.

Optionally, the receiving module 83 is specifically configured to:

and receiving the indication information sent by the target base station.

Optionally, the receiving module 83 is specifically configured to:

and receiving the indication information sent by the terminal equipment.

Optionally, if the processing module 82 stops configuring the transmission resource for direct communication for the terminal device, the sending module 81 is further configured to:

and sending first notification information to the target base station, where the first notification information is used to instruct the source base station to stop configuring transmission resources for the terminal device for direct communication, or is used to instruct the target base station to configure transmission resources for the terminal device for direct communication.

Optionally, the receiving module 83 is further configured to receive a first buffer status report BSR sent by the terminal device, where the first BSR is used to indicate that a data volume of the terminal device for performing direct communication is a preset value 0;

the processing module 82 is further configured to stop configuring transmission resources for direct communication for the terminal device.

Optionally, a processing module 82 is further included; the sending module 81 is further configured to:

if the processing module 82 determines that the amount of data of the direct communication buffered in the HARQ process of the terminal device is 0, send second notification information to a target base station, where the second notification information is used to indicate that the target base station configures transmission resources for the direct communication for the terminal device.

Optionally, the apparatus further includes a receiving module 83, where the receiving module 83 is further configured to:

before the sending module 81 sends a handover command message to a terminal device performing direct communication, receiving a handover request acknowledgement message sent by a target base station, where the handover request acknowledgement message includes an RNTI, the RNTI is a downlink control signaling which is allocated by the target base station for the terminal device and used for the target base station to scramble second scheduling information, and the second scheduling information is used for indicating a transmission resource configured by the target base station for the terminal device and used for direct communication;

correspondingly, the handover command message includes the RNTI.

The source base station provided in this embodiment is configured to execute operations executed by the source base station in the method embodiment of the present application, and the principles are similar and are not described herein again.

Fig. 9 is a schematic structural diagram of a target base station according to an embodiment of the present application. As shown in fig. 9, the target base station provided in this embodiment may include:

a sending module 91, configured to send a handover request acknowledgement message to a source base station, where the handover request acknowledgement message is used to indicate a terminal device performing direct communication to perform DAPS handover;

the sending module 91 is further configured to send second scheduling information to the terminal device after the terminal device successfully accesses the target base station, where the second scheduling information is used to indicate a transmission resource configured for the terminal device by the target base station and used for direct communication.

Optionally, a processing module 92 is further included; a processing module 92, configured to generate second scheduling information before the sending module 91 sends the second scheduling information to the terminal device;

optionally, the sending module 91 is further configured to:

Optionally, the apparatus further includes a receiving module 93, where the receiving module 93 is configured to:

Optionally, the sending module 91 is further configured to:

The target base station provided in this embodiment is configured to execute operations executed by the target base station in the method embodiment of the present application, and the principles are similar and are not described herein again.

Fig. 10 is a schematic structural diagram of a communication device according to an embodiment of the present application. As shown in fig. 10, the communication apparatus 700 according to this embodiment may be the terminal device or the source base station or the target base station mentioned in the foregoing method embodiments. The communication apparatus 700 may be configured to implement the operations performed by the terminal device or the source base station or the target base station in the foregoing method embodiments, which are specifically referred to in the description of the foregoing method embodiments.

The communication device 700 may comprise one or more processors 701, where the processors 701 may also be referred to as processing units and may implement certain control or processing functions. The processor 701 may be a general-purpose processor or a special-purpose processor, etc. For example, a baseband processor, or a central processor. The baseband processor may be configured to process communication protocols and communication data, and the central processor may be configured to control the communication device, execute software programs, and process data of the software programs.

In an alternative design, processor 701 may also have instructions 703 or data (e.g., intermediate data) stored therein. The instructions 703 may be executed by the processor, so that the communication apparatus 700 performs the operations corresponding to the terminal device or the source base station or the target base station described in the foregoing method embodiments.

In yet another possible design, communications device 700 may include circuitry that may implement the functionality of transmitting or receiving or communicating in the foregoing method embodiments.

Optionally, the communication device 700 may include one or more memories 702, on which instructions 704 may be stored, and the instructions may be executed on the processor, so that the communication device 700 performs the method described in the above method embodiments.

Optionally, the memory may also store data. The processor and the memory may be provided separately or may be integrated together.

Optionally, the communication device 700 may further include a transceiver 705 and/or an antenna 706. The processor 701 may be referred to as a processing unit and controls a communication apparatus (a terminal device or a source base station or a target base station). The transceiver 705 may be referred to as a transceiver unit, a transceiver, a transceiving circuit, a transceiver, or the like, and is used for implementing transceiving functions of a communication device.

The processor 701 and the transceiver 705 described herein may be implemented on an Integrated Circuit (IC), an analog IC, a Radio Frequency Integrated Circuit (RFIC), a mixed signal IC, an Application Specific Integrated Circuit (ASIC), a Printed Circuit Board (PCB), an electronic device, or the like. The processor and transceiver may also be fabricated using various 1C process technologies, such as Complementary Metal Oxide Semiconductor (CMOS), N-type metal oxide semiconductor (NMOS), P-type metal oxide semiconductor (PMOS), bipolar Junction Transistor (BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), and the like.

Although in the above description of the embodiments, the communication apparatus 700 is described by taking a terminal device or a source base station or a target base station as an example, the scope of the communication apparatus described in the present application is not limited to the above terminal device or the source base station or the target base station, and the structure of the communication apparatus may not be limited by fig. 10. The communications apparatus 700 may be a stand-alone device or may be part of a larger device. For example, the device may be:

(1) A stand-alone integrated circuit IC, or chip, or system-on-chip or subsystem;

(2) A set of one or more ICs, which optionally may also include storage components for storing data and/or instructions;

(3) An ASIC, such as a modem (MSM);

(4) A module that may be embedded within other devices;

(5) Receivers, wireless devices, mobile units, network devices, and the like;

(6) Others, and so forth.

Fig. 11 is a schematic structural diagram of a terminal device according to an embodiment of the present application. The terminal device may be applicable to the terminal devices described in the above embodiments of the present application. For convenience of explanation, fig. 11 shows only main components of the terminal device. As shown in fig. 11, the terminal apparatus 800 includes a processor, a memory, a control circuit, an antenna, and an input-output device. The processor is mainly used for processing communication protocols and communication data, controlling the whole terminal, executing software programs and processing data of the software programs. The memory is used primarily for storing software programs and data. The radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user.

When the terminal device is turned on, the processor can read the software program in the storage unit, interpret and execute the instruction of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor outputs a baseband signal to the radio frequency circuit after performing baseband processing on the data to be sent, and the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is sent to the terminal, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data.

Those skilled in the art will appreciate that fig. 11 shows only one memory and processor for ease of illustration. In an actual terminal, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, and the like, which is not limited in this application.

As an alternative implementation manner, the processor may include a baseband processor and a central processing unit, where the baseband processor is mainly used to process a communication protocol and communication data, and the central processing unit is mainly used to control the whole terminal, execute a software program, and process data of the software program. The processor in fig. 11 integrates the functions of the baseband processor and the central processing unit, and those skilled in the art will understand that the baseband processor and the central processing unit may also be independent processors, and are interconnected through a bus or the like. Those skilled in the art will appreciate that the terminal device may include a plurality of baseband processors to accommodate different network formats, the terminal device may include a plurality of central processors to enhance its processing capability, and various components of the terminal device may be connected by various buses. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.

In one example, the antenna and the control circuit with transceiving functions can be considered as a transceiving module 801 of the terminal device 800, and the processor with processing functions can be considered as a processing module 802 of the terminal device 800. As shown in fig. 11, the terminal device 800 includes a transceiver module 801 and a processing module 802. A transceiver module may also be referred to as a transceiver, a transceiver device, etc. Optionally, a device in the transceiving module 801 for implementing a receiving function may be regarded as a receiving module, and a device in the transceiving module 801 for implementing a sending function may be regarded as a sending module, that is, the transceiving module 801 includes a receiving module and a sending module, the receiving module may also be referred to as a receiver, a receiving circuit, and the like, and the sending module may be referred to as a transmitter, or a sending circuit, and the like.

Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present application, and are not limited thereto; although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for resource allocation, comprising:

receiving a switching command message sent by a source base station, wherein the switching command message is used for indicating terminal equipment which is in direct communication to carry out DAPS switching of a dual activation stack;

2. The method of claim 1, further comprising:

3. The method of claim 1, wherein after receiving the second scheduling information transmitted by the target base station, the method further comprises:

4. The method of claim 1, wherein the handover command message includes a first Radio Network Temporary Identity (RNTI), and the first RNTI is allocated by the target base station for the terminal device and used for scrambling downlink control signaling corresponding to the second scheduling information.

5. The method of any of claims 1-4, further comprising:

6. The method according to any one of claims 1-4, further comprising:

and after the terminal equipment successfully accesses the target base station, sending a first Buffer Status Report (BSR) to the source base station, where the first BSR is used to indicate that the data volume of the terminal equipment for direct communication is a preset value 0.

7. The method according to any one of claims 1-4, further comprising:

8. The method according to any of claims 1-4, wherein the handover command message comprises time information indicating a time at which the terminal device receives the first scheduling information and/or the second scheduling information, respectively.

9. The method according to any of claims 1-4, wherein the downlink control signaling corresponding to the first scheduling information is scrambled by a second RNTI allocated to the terminal device by the source base station.

10. A method for resource allocation, comprising:

sending a switching command message to terminal equipment which is in direct communication, wherein the switching command message is used for indicating the terminal equipment to carry out DAPS switching of a dual-activation stack;

11. The method of claim 10, further comprising:

12. The method of claim 11, wherein the receiving the indication information comprises:

and receiving the indication information sent by the target base station.

13. The method of claim 11, wherein the receiving indication information comprises:

and receiving the indication information sent by the terminal equipment.

14. The method of claim 13, wherein if the terminal device ceases to be configured with transmission resources for direct communication, the method further comprises:

15. The method of claim 13, further comprising:

receiving a first Buffer Status Report (BSR) sent by the terminal equipment, wherein the first BSR is used for indicating that the data volume of the terminal equipment for direct communication is a preset value 0;

16. The method of any one of claims 10-15, further comprising:

and if the data volume of the direct communication cached in the hybrid automatic repeat request HARQ process of the terminal equipment is determined to be 0, sending second notification information to a target base station, wherein the second notification information is used for indicating the target base station to configure transmission resources for the direct communication for the terminal equipment.

17. The method according to any one of claims 10-15, wherein before sending the handover command message to the terminal device in direct communication, the method further comprises:

receiving a handover request confirmation message sent by a target base station, where the handover request confirmation message includes a Radio Network Temporary Identifier (RNTI), the RNTI is allocated by the target base station for the terminal device and is used for the target base station to scramble a downlink control signaling corresponding to second scheduling information, and the second scheduling information is used for indicating a transmission resource configured by the target base station for the terminal device and used for direct communication;

correspondingly, the handover command message includes the RNTI.

18. The method according to claim 17, wherein the handover request acknowledge message and the handover command message further comprise time information indicating a time when the terminal device receives the first scheduling information and/or the second scheduling information, respectively.

19. A method for resource allocation, comprising:

sending a switching request confirmation message to a source base station, wherein the switching request confirmation message is used for indicating the terminal equipment which is in direct communication to carry out DAPS switching of a double-activation stack;

20. The method of claim 19, further comprising:

21. The method of claim 19, further comprising:

22. The method of claim 19, further comprising:

and receiving second notification information sent by the source base station, wherein the second notification information is sent after the source base station determines that the data volume of the direct communication cached in the hybrid automatic repeat request (HARQ) process of the terminal equipment is 0, and is used for indicating the target base station to configure transmission resources for the direct communication for the terminal equipment.

23. The method of claim 19, further comprising:

and receiving a Buffer Status Report (BSR) sent by the terminal equipment, wherein the BSR contains the data volume of the direct communication buffered in the hybrid automatic repeat request (HARQ) process of the terminal equipment.

24. The method as claimed in any one of claims 19 to 23, wherein the handover request acknowledge message includes a radio network temporary identity RNTI assigned by the target base station for the terminal device and used for scrambling downlink control signaling corresponding to the second scheduling information.

25. The method according to any of claims 19-23, wherein the handover request acknowledge message further comprises time information, and the time information is used to indicate a time for the terminal device to receive first scheduling information and/or second scheduling information, and the first scheduling information is transmitted by the source base station to the terminal device and is used to indicate the transmission resources configured by the source base station for the terminal device for direct communication.

26. A terminal device, comprising:

a receiving module, configured to receive a handover command message sent by a source base station, where the handover command message is used to instruct a terminal device performing direct communication to perform dual-active stack DAPS handover;

27. The terminal device of claim 26, wherein the receiving module is further configured to:

28. The terminal device of claim 26, further comprising a processing module configured to:

29. The terminal device of claim 26, wherein the handover command message includes a first Radio Network Temporary Identity (RNTI), and the first RNTI is allocated by the target base station for the terminal device and used for scrambling downlink control signaling corresponding to the second scheduling information.

30. The terminal device according to any of claims 26-29, further comprising a sending module configured to:

31. The terminal device according to any of claims 26-29, further comprising a sending module configured to:

and after the terminal equipment is successfully accessed to the target base station, sending a first Buffer Status Report (BSR) to the source base station, wherein the first BSR is used for indicating that the data volume of the terminal equipment for direct communication is a preset value 0.

32. The terminal device according to any of claims 26-29, further comprising a sending module configured to:

33. A terminal device according to any of claims 26-29, wherein the handover command message comprises time information indicating the time at which the terminal device receives the first scheduling information and/or the second scheduling information, respectively.

34. The terminal device according to any of claims 26-29, wherein the downlink control signaling corresponding to the first scheduling information is scrambled by a second RNTI, and the second RNTI is allocated to the terminal device by the source base station.

35. A source base station, comprising:

a sending module, configured to send a handover command message to a terminal device performing direct communication, where the handover command message is used to instruct the terminal device to perform dual activation stack DAPS handover;

36. The source base station of claim 35, further comprising a receiving module and a processing module;

the processing module is configured to reduce the transmission resource configured for the terminal device for direct communication, or stop configuring the transmission resource for the terminal device for direct communication.

37. The source base station of claim 36, wherein the receiving module is specifically configured to:

and receiving the indication information sent by the target base station.

38. The source base station of claim 36, wherein the receiving module is specifically configured to:

and receiving the indication information sent by the terminal equipment.

39. The source base station of claim 38, wherein if the processing module stops configuring transmission resources for the terminal device for direct communication, the sending module is further configured to:

40. The source base station of claim 38,

the receiving module is further configured to receive a first buffer status report BSR sent by the terminal device, where the first BSR is used to indicate that a data volume of the terminal device for performing direct communication is a preset value 0;

41. The source base station according to any of claims 36-40, further comprising a processing module; the sending module is further configured to:

if the processing module determines that the data volume of the direct communication cached in the hybrid automatic repeat request HARQ process of the terminal device is 0, sending second notification information to a target base station, where the second notification information is used to indicate that the target base station configures transmission resources for the terminal device, where the transmission resources are used for the direct communication.

42. The source base station according to any of claims 36-40, further comprising a receiving module, wherein the receiving module is further configured to:

before the sending module sends a handover command message to a terminal device which is in direct communication, receiving a handover request confirmation message sent by a target base station, wherein the handover request confirmation message comprises a Radio Network Temporary Identifier (RNTI), the RNTI is a downlink control signaling which is allocated to the terminal device by the target base station and is used for scrambling a second scheduling information corresponding to the target base station, and the second scheduling information is used for indicating a transmission resource which is configured for the terminal device by the target base station and is used for direct communication;

correspondingly, the handover command message includes the RNTI.

43. The source base station of claim 42, wherein the handover request acknowledge message and the handover command message further comprise time information indicating a time when the terminal device receives the first scheduling information and/or the second scheduling information, respectively.

44. A target base station, comprising:

a sending module, configured to send a handover request acknowledgement message to a source base station, where the handover request acknowledgement message is used to indicate a terminal device performing direct communication to perform dual-active stack DAPS handover;

45. The target base station of claim 44, wherein the sending module is further configured to:

46. The target base station of claim 44, further comprising a receiving module configured to:

receiving first notification information sent by the source base station, where the first notification information is sent by the source base station after the source base station stops configuring transmission resources for direct communication for the terminal device, and is used to instruct the source base station to stop configuring transmission resources for direct communication for the terminal device, or is used to instruct the target base station to configure transmission resources for direct communication for the terminal device.

47. The target base station of claim 44, wherein the sending module is further configured to:

48. The target base station of claim 44, further comprising a receiving module configured to:

49. The target base station according to any of claims 44 to 48, wherein the handover request confirm message includes a Radio Network Temporary Identity (RNTI) allocated by the target base station for the terminal device and used for scrambling downlink control signaling corresponding to the second scheduling information.

50. The target base station according to any of claims 44 to 48, wherein the handover request acknowledge message further comprises time information, the time information is used to indicate a time for the terminal device to receive the first scheduling information and/or the second scheduling information, the first scheduling information is transmitted from the source base station to the terminal device and is used to indicate the transmission resources configured for the terminal device by the source base station for direct communication.

51. A terminal device comprising a memory, a processor and a transceiver; the transceiver is for communicating with other devices, and the processor executes program instructions in the memory for implementing the method of any one of claims 1-9.

52. A source base station comprising a memory, a processor, and a transceiver; the transceiver is for communicating with other devices, and the processor executes program instructions in the memory for implementing the method of any one of claims 10-18.

53. A target base station comprising a memory, a processor, and a transceiver; the transceiver is for communicating with other devices, and the processor executes program instructions in the memory for implementing the method of any one of claims 19-25.

54. A computer-readable storage medium, comprising: computer program stored thereon, characterized in that the program, when being executed by a processor, carries out the method of any one of claims 1-25.