CN112260778B

CN112260778B - Method for evaluating broadcast channel and related product

Info

Publication number: CN112260778B
Application number: CN202011114602.1A
Authority: CN
Inventors: 梁宏
Original assignee: Spreadtrum Semiconductor Chengdu Co Ltd
Current assignee: Spreadtrum Semiconductor Chengdu Co Ltd
Priority date: 2020-10-16
Filing date: 2020-10-16
Publication date: 2023-02-14
Anticipated expiration: 2040-10-16
Also published as: CN112260778A

Abstract

The embodiment of the application discloses a method for evaluating a broadcast channel and a related product, wherein the method comprises the following steps: the method comprises the steps that a first terminal device broadcasts a first message in M synchronous broadcast control sub-events, the first message is used for requesting a second terminal device to send a broadcast channel assessment report, the second terminal device receives the first message and sends a second message, the second message comprises the broadcast channel assessment report of the broadcast channel occupied by the second terminal device, the first terminal device receives the second messages from the M second terminal devices respectively, and the first terminal device determines a first broadcast channel based on each broadcast channel assessment report in the M second messages. According to the method and the device, bidirectional control information transmission is carried out through unidirectional synchronous broadcasting, and channel selection is carried out through a broadcast channel assessment report fed back by the second terminal equipment, so that interference can be effectively avoided.

Description

Method for evaluating broadcast channel and related product

Technical Field

The present application relates to the field of bluetooth technologies, and in particular, to a method for evaluating a broadcast channel and a related product.

Background

In the Bluetooth LE Audio standard, a Broadcast Isochronous Group (BIG) Event includes multiple Broadcast Isochronous Stream (BIS) events. Each BIG Event is composed of a plurality of BIS events and one control subframe for control information, and each BIG Event is divided into a plurality of subframes. However, data in a Broadcast Isochronous Stream (BIS) Event or a BIG Control PDU in a BIG Control summary is unidirectional Broadcast data, and a sending end using BIS or BIG can only perform unidirectional transmission, so that the sending end can only perform channel quality evaluation by itself, and the problem of channel interference cannot be avoided.

Disclosure of Invention

The embodiment of the application provides an evaluation method of a broadcast channel and a related product, which can effectively avoid interference by carrying out bidirectional control information transmission through unidirectional synchronous broadcast and carrying out channel selection through a broadcast channel evaluation report fed back by a second terminal device.

In a first aspect, an embodiment of the present application provides a method for evaluating a broadcast channel, which is applied to a first terminal device, and the method includes:

broadcasting a first message in M synchronous broadcast control subevents, wherein the first message is used for requesting a second terminal device to send a broadcast channel evaluation report, and M is a positive integer;

receiving second messages from M second terminal devices, respectively, where the second messages include a broadcast channel assessment report that the second terminal device occupies a broadcast channel, and the second message of the ith second terminal device is a second message received by the first terminal device in an ith synchronous broadcast control subevent;

determining a first broadcast channel based on each of the broadcast channel assessment reports in the M second messages.

In a second aspect, an embodiment of the present application provides a method for evaluating a broadcast channel, which is applied to a second terminal device, and the method includes:

receiving a first message from a first terminal device, the first message being used for requesting the second terminal device to send a broadcast channel assessment report;

sending a second message to the first terminal device, the second message including the broadcast channel assessment report that the second terminal device occupies a broadcast channel.

In a third aspect, an embodiment of the present application provides an apparatus for evaluating a broadcast channel, where the apparatus is applied to a first terminal device, and the apparatus includes:

a transceiving unit, configured to broadcast a first message in the first M synchronized broadcast control subevents, where the first message is used to request the second terminal device to send a broadcast channel assessment report;

the transceiver unit is further configured to receive second messages from M second terminal devices, respectively, where the second messages include broadcast channel assessment reports that the second terminal devices occupy broadcast channels;

a determining unit, configured to determine a first broadcast channel based on the M broadcast channel assessment reports.

In a fourth aspect, an embodiment of the present application provides an apparatus for evaluating a broadcast channel, where the apparatus is applied to a second terminal device, and the apparatus includes:

a transceiving unit, configured to receive a first message from a first terminal device, where the first message is used to request the second terminal device to send a broadcast channel assessment report;

the transceiver unit is further configured to send a second message to the first terminal device, where the second message includes the broadcast channel assessment report that the second terminal device occupies a broadcast channel.

In a fifth aspect, embodiments of the present application provide a first terminal device, the first terminal device including a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs including instructions for performing some or all of the steps described in the method of the first aspect.

In a sixth aspect, embodiments of the present application provide a second terminal device, where the second terminal device includes a processor, a memory, a communication interface, and one or more programs, where the one or more programs are stored in the memory and configured to be executed by the processor, and where the program includes instructions for performing some or all of the steps described in the method of the second aspect.

In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium storing a computer program for electronic data exchange, where the computer program makes a computer perform some or all of the steps described in the method of the first aspect or the second aspect.

In an eighth aspect, embodiments of the present application provide a computer program product, where the computer program product includes a non-transitory computer-readable storage medium storing a computer program, where the computer program is operable to cause a computer to perform some or all of the steps described in the method according to the first or second aspect of the embodiments of the present application. The computer program product may be a software installation package.

In this embodiment of the present application, a first terminal device broadcasts a first message in M pieces of synchronized broadcast control subevents, where the first message is used to request a second terminal device to send a broadcast channel assessment report, the second terminal device receives the first message from the first terminal device and sends a second message to the first terminal device, where the second message includes the broadcast channel assessment report that the second terminal device occupies a broadcast channel, the first terminal device receives second messages from M pieces of the second terminal device respectively, the ith piece of the second message of the second terminal device is the second message that the first terminal device receives in the ith piece of synchronized broadcast control subevent, and the first terminal device determines a first broadcast channel based on each of the M pieces of the broadcast channel assessment report. According to the method and the device, bidirectional control information transmission is carried out through unidirectional synchronous broadcasting, and channel selection is carried out through a broadcast channel assessment report fed back by the second terminal equipment, so that interference can be effectively avoided.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

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

fig. 2a is a schematic diagram of a two-channel broadcast voice scene provided in an embodiment of the present application;

FIG. 2b is a diagram of a BIG Info field according to an embodiment of the present disclosure;

FIG. 3a is a schematic diagram of a BIS event provided by an embodiment of the present application;

FIG. 3b is a schematic diagram of a BIG event provided by an embodiment of the present application;

fig. 3c is a schematic diagram of a BIG _ CHANNEL _ MAP _ IND field according to an embodiment of the present application;

fig. 4 is a flowchart illustrating a method for evaluating a broadcast channel according to an embodiment of the present application;

FIG. 5a is a timing diagram of a synchronous broadcast channel assessment request according to an embodiment of the present application;

FIG. 5b is a diagram of sending a BIG _ CHANNEL _ REPORT in CSMA/CD mode according to an embodiment of the present application;

FIG. 5c is a diagram of another example of sending a BIG _ CHANNEL _ REPORT in a CSMA/CD mode according to the embodiment of the present application;

fig. 6a is a schematic diagram of a BIG _ CHANNEL _ REPORT _ REQ message format according to an embodiment of the present application;

fig. 6b is a schematic diagram of a BIG _ CHANNEL _ REPORT message format provided in an embodiment of the present application;

fig. 6c is a schematic diagram of a BIG _ CHANNEL _ REPORT _ ACK message format provided in an embodiment of the present application;

fig. 7 is a flowchart illustrating another method for evaluating a broadcast channel according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of an apparatus for evaluating a broadcast channel according to an embodiment of the present application;

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

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

It should be understood that the technical solutions provided in the embodiments of the present application may be applied to various communication systems, for example: a 5G communication system (e.g., new Radio, NR)), where the 5G mobile communication system includes a non-standalone (NSA) 5G mobile communication system and/or a Standalone (SA) 5G mobile communication system. The technical solution provided in the present application may also be applied to a communication system with a convergence of multiple communication technologies (for example, a communication system with a convergence of an LTE technology and an NR technology), or may be applied to various future new communication systems, for example, a 6G communication system, a 7G communication system, and the like, which is not limited in this embodiment of the present application. The technical solution of the embodiment of the present application is also applicable to different network architectures, including but not limited to a relay network architecture, a dual link architecture, a Vehicle-to-any-object communication (Vehicle-to-event) architecture, and the like.

The embodiment of the application relates to a first terminal device and/or a second terminal device including a device with a wireless communication function, where the first terminal device and/or the second terminal device may be a mobile phone (mobile phone), a tablet computer (pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid, a wireless terminal in smart home (smart home), and the like. The first terminal device and/or the second terminal device may also be a handheld device with a wireless communication function, a vehicle-mounted device, a wearable device, a computer device or other processing device connected to a wireless modem, a terminal device in a future 5G Network, or a terminal device in a Public Land Mobile Network (PLMN) for future evolution, and the like. The first terminal device and/or the second terminal device in different networks may be called different names, for example: a user equipment, an access terminal, a subscriber unit, a subscriber Station, a Mobile Station (MS), a remote Station, a remote terminal, a Mobile device, a user terminal, a Wireless communication device, a user agent or a user equipment, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) Station, a Personal Digital Assistant (PDA), a terminal device in a 5G network or a future evolution network, etc., which are not limited in this embodiment.

Referring to fig. 1, fig. 1 is a schematic diagram of a communication system according to an embodiment of the present disclosure. As shown in fig. 1, the wireless communication system may include a first terminal device and a second terminal device. The first terminal device may communicate with the second terminal device via bluetooth technology. The form and number of the first terminal device and the second terminal device shown in fig. 1 are only examples, and do not limit the embodiments of the present application.

Currently, the next generation standard of Bluetooth wireless Audio is promised in earnest, and Bluetooth LE Audio fully supports isochronous (isochronous) architecture of Bluetooth LE of Bluetooth 5.2 standard, and brings innovative solutions to the True Wireless Stereo (TWS) earphone market. One heavyweight application scenario for Bluetooth LE Audio is Broadcast Audio (Broadcast Audio) technology, which enables an Audio source device to Broadcast one or more Audio streams to an unlimited number of Audio receiving devices, and the addition of Broadcast Audio technology provides implementation opportunities for "Audio sharing". Bluetooth audio sharing, based on broadcast audio technology, may be personal or location based. Through bluetooth audio sharing, people will be able to share the bluetooth audio experience with others around; for example, music in a smartphone is shared with family and friends. And the method is suitable for public places such as airports, bars, gymnasiums, movie theaters, conference centers and the like through the position-based audio sharing. Broadcast audio applications for BLE are based on Broadcast Isochronous Streams (BIS) and Broadcast Isochronous Groups (BIG) techniques in the BT5.2 core standard Isochronous Channel (BLE Isochronous Channel). As shown in fig. 2a, in a binaural broadcast voice scene, a Master (Master) device M may send voice data of two left and right channels to synchronous broadcasts of multiple Slave (Slave) devices, and the Slave devices may have multiple left-ear devices L or right-ear devices M to receive the voice data.

Wherein the BIS or BIG supports one-way communication. The second terminal device (secondary device) needs to listen to the AUX _ SYNC _ IND broadcast message of the first terminal device (primary device) first, where the broadcast message includes a BIG Info field, the BIG Info field is shown in fig. 2b, data included in the BIG Info field is used for synchronizing with the required BIS, and a ChM field of 37 bits represents an available channel among 37 effective channels.

In the Bluetooth LE Audio standard, each broadcast channel is called a BIS Event, and as shown in fig. 3a, the Interval between BIS events is a fixed value ISO Interval, and each BIS Event has a fixed start time (Anchor Point), in which data can be retransmitted for a limited number of times. For better transmission of BIS data, there is a BIG Control PDU for Control information in the BIG Event, as shown in fig. 3 b. The first terminal device may adjust the frequency of the BIS or BIG broadcast CHANNEL through the BIG _ CHANNEL _ MAP _ IND field. The BIG _ CHANNEL _ MAP _ IND field is shown in fig. 3c, the ChM field in the BIG _ CHANNEL _ MAP _ IND field indicates a useful ISO data CHANNEL, and the Instant field indicates the time when the useful data CHANNEL table in the BIG Control PDU is valid. According to the method, a ChM field in a BIG Info field or a BIG _ CHANNEL _ MAP _ IND field can be used for CHANNEL selection, but data in a BIS Event or a BIG Control PDU in a BIG Control subsequent are all unidirectional broadcast data, and unidirectional transmission can be performed on a transmitting end adopting the BIS or the BIG, so that the first terminal equipment can only perform CHANNEL quality evaluation by itself, and the problem of CHANNEL interference cannot be avoided.

In order to solve the above problem, the present application provides a method for evaluating a broadcast channel, which performs bidirectional control information transmission through unidirectional synchronous broadcast, and performs channel selection through a broadcast channel evaluation report fed back by a second terminal device, so as to effectively avoid interference.

In order to make the technical solutions of the present application better understood, 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 only a part of the embodiments of the present application, and not all of the 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.

Referring to fig. 4, fig. 4 is a flowchart illustrating a method for evaluating a broadcast channel according to an embodiment of the present application, applied to the communication system shown in fig. 1. As shown in fig. 4, the method includes the steps of:

s410, a first terminal device broadcasts a first message in M synchronous broadcast control sub-events, wherein the first message is used for requesting a second terminal device to send a broadcast channel evaluation report, and M is a positive integer.

In order to effectively avoid channel interference, the first terminal device may perform bidirectional control information transmission in unidirectional synchronous broadcast, and obtain broadcast channel evaluation reports of a plurality of second terminal devices by broadcasting request information to the second terminal devices. The first terminal device broadcasts the first information to a plurality of second terminal devices in a BIG Control Event as shown in fig. 3b to request the second terminal devices to feed back the broadcast channel assessment reports.

For example, as shown in fig. 5a, the device M transmits a broadcast CHANNEL assessment REPORT request (BIG _ CHANNEL _ REPORT _ REQ) R1 to a plurality of devices S1, S2, \8230ina BIG Control Event of a first BIG Event; the device M sends a broadcast CHANNEL assessment REPORT request (BIG _ CHANNEL _ REPORT _ REQ) R1 to a plurality of devices S1, S2, \ 8230in a BIG Control Event of a second BIG Event, and so on until the first terminal device receives the second information fed back by all the associated second terminal devices.

S420, receiving a first message from a first terminal device, and sending a second message to the first terminal device, where the second message includes the broadcast channel assessment report that the second terminal device occupies a broadcast channel.

Due to the change of the surrounding environment, the second terminal device can feed back the receiving quality status of each channel of the first terminal device according to the received condition.

Optionally, the first message includes a SELECT _ GROUP field, where the SELECT _ GROUP field is used to indicate whether the second terminal device sends the broadcast channel assessment report.

The BIG _ CHANNEL _ REPORT _ REQ may include a SELECT _ GROUP field, and the second terminal device that receives the BIG _ CHANNEL _ REPORT _ REQ may determine whether it needs to feed back the broadcast CHANNEL evaluation REPORT BIG _ CHANNEL _ REPORT according to the SELECT _ GROUP field in the BIG _ CHANNEL _ REPORT _ REQ.

In this embodiment, when the SELECT _ GROUP field in the BIG _ CHANNEL _ REPORT _ REQ indicates the second terminal device to send the broadcast CHANNEL evaluation REPORT, in order to prevent multiple second terminal devices from simultaneously feeding back the BIG _ CHANNEL _ REPORT after the broadcast BIG _ CHANNEL _ REPORT _ REQ is sent, thereby causing a collision, the SELECT _ GROUP field may be used to control the second terminal device to respond to the reply BIG _ CHANNEL _ REPORT.

Optionally, the sending the second message to the first terminal device includes: and sending a second message to the first terminal device under the condition that the SELECT _ GROUP field indicates that the second terminal device sends a broadcast channel evaluation report.

Specifically, if the SELECT _ GROUP field in the BIG _ CHANNEL _ REPORT _ REQ indicates that the second terminal device needs to feed back the BIG _ CHANNEL _ REPORT, the second terminal device feeds back the BIG _ CHANNEL _ REPORT after receiving the BIG _ CHANNEL _ REPORT _ REQ message.

In a possible embodiment, the SELECT _ GROUP field includes a first bit, and the first bit is used to indicate a device identifier of the second terminal device.

Specifically, the first bit in the SELECT _ GROUP field may specify an Equipment identifier of the second terminal device, where the Equipment identifier may be Identification information for uniquely indicating the second terminal device, and for example, the Equipment identifier may be an International Mobile Subscriber Identity (IMSI), a global Unique Temporary UE Identity (GUTI), an International Mobile Equipment Identity (IMEI), a Mobile Subscriber Identity Number (MSIN), a bluetooth address, or the like. The device identity indicated by the first bit may indicate that the BIG _ CHANNEL _ REPORT _ REQ message broadcast by the first terminal device is a message sent to a second terminal device of a certain specified device identity. Then, the second terminal device of the specified device identification feeds back the BIG _ CHANNEL _ REPORT after receiving the BIG _ CHANNEL _ REPORT _ REQ message. In this case the first terminal device maintains a list of devices that are in the listening state for a long time.

For example, as shown in fig. 5a, the device M broadcasts R1 at the first BIG Control Event, where the SELECT _ GROUP field in R1 indicates the devices S1, S2, \8230, sn sends a BIG _ CHANNEL _ REPORT (C1), and the first bit in the SELECT _ GROUP field indicates the device id of the device S1, then the device S1 feeds back C1 to the device M after receiving R1. The device M broadcasts R2 at a second BIG Control Event, where the SELECT _ GROUP field in R2 indicates devices S1, S2, \ 8230, sn sends C2, and the first bit in the SELECT _ GROUP field indicates the device id of the device S2, and then the device S2 feeds back C2 to the device M after receiving R2.

In a possible embodiment, the SELECT _ GROUP field includes a second bit, and the second bit is used to instruct the second terminal device to send the second message based on a carrier sense multiple access/collision detection protocol CSMA/CD for a first time period, where the first time period includes a first time period and a second time period.

The SELECT _ GROUP field may not specify the device identifier for feeding back the broadcast CHANNEL assessment REPORT, and the BIG _ CHANNEL _ REPORT _ REQ message sent by the first terminal device is sent to any second terminal device that wants to feed back the BIG _ CHANNEL _ REPORT. Therefore, the second terminal device may transmit the BIG _ CHANNEL _ REPORT in a Carrier Sense Multiple Access with Collision Detection (CSMA/CD) manner similar to 802.11 to avoid Collision when receiving the BIG _ CHANNEL _ REPORT _ REQ message. As shown in fig. 5b, R represents a BIG _ CHANNEL _ REPORT _ REQ message, when the SELECT _ GROUP field indicates that the second terminal device transmits C, i.e., BIG _ CHANNEL _ REPORT, the second terminal device that receives R transmits C using CSMA/CD. The second terminal device receiving R performs CSMA/CD transmission with an Inter Frame Gap (IFG) size from the beginning of the Offset period to the Offset period + Window period, and cancels the CSMA/CD mode if transmission is successful.

For example, as shown in fig. 5a, the device M broadcasts R1 at the first BIG Control Event, where the SELECT _ GROUP field in R1 indicates devices S1, S2, \8230, sn sends BIG _ CHANNEL _ REPORT (C1), devices S1, S2, \8230, and Sn sends C1 using CSMA/CD after receiving R1, where the device S1 competes for this sending opportunity, so the device S1 sends C1 to the device M, and the device S1 cancels CSMA/CD mode. Device M broadcasts R2 at a second BIG Control Event, device S2, \ 8230, sn sends C2 with CSMA/CD after receiving R1, wherein device S2 competes for this transmission opportunity, so device S2 sends C2 to device M and device S2 cancels CSMA/CD mode.

S430, the first terminal device receives second messages from M second terminal devices, respectively, where the second message of the ith second terminal device is the second message received by the first terminal device in the ith synchronous broadcast control sub-event.

In this embodiment, the first terminal device may broadcast BIG _ CHANNEL _ REPORT _ REQ to M second terminal devices in each BIG Control Event, and after the M second terminal devices receive the BIG _ CHANNEL _ REPORT _ REQ, one second terminal device of the M second terminal devices feeds back BIG _ CHANNEL _ REPORT to the first terminal device, where the first terminal device may specify in which BIG Control Event the second terminal device feeds back BIG _ CHANNEL _ REPORT, or the M second terminal devices may compete to acquire an opportunity to send BIG _ CHANNEL _ REPORT. That is, the first terminal device can receive only one BIG _ CHANNEL _ REPORT in each BIG Control Event.

Optionally, the method further includes: and the first terminal equipment sends a third message to the second terminal equipment, and correspondingly, the second terminal equipment receives the third message from the first terminal equipment, wherein the third message is used for responding to the second message.

After receiving the BIG _ CHANNEL _ REPORT of the second terminal device, the first terminal device may send a response message BIG _ CHANNEL _ REPORT _ ACK to the corresponding second terminal device.

For example, as shown in fig. 5a, after the device M receives C1 (BIG _ CHANNEL _ REPORT) sent by the device S1 in the first BIG Control Event, the device M may send a response message A1 (BIG _ CHANNEL _ REPORT _ ACK) to the device S1. After the device M receives C2 (BIG _ CHANNEL _ REPORT) sent by the device S2 in the second BIG Control Event, the device M may send a response message A2 (BIG _ CHANNEL _ REPORT _ ACK) to the device S2.

In a possible embodiment, the sending the third message to the second terminal device includes: and transmitting the third message to the second terminal equipment on the first frequency.

Specifically, to avoid interference, the first terminal device may transmit a BIG _ CHANNEL _ REPORT _ ACK at a new frequency specified in the SELECT _ GROUP field. Accordingly, after the second terminal device sends the BIG _ CHANNEL _ REPORT, it may listen to the BIG _ CHANNEL _ REPORT _ ACK at the new frequency specified in the SELECT _ GROUP field.

In a possible embodiment, the sending the third message to the second terminal device includes: and sending the third message to the second terminal equipment at a first moment after receiving the second message from the second terminal equipment.

Specifically, when the SELECT _ GROUP field in the BIG _ CHANNEL _ REPORT _ REQ includes the second bit, that is, the second terminal device sends the BIG _ CHANNEL _ REPORT based on the CSMA/CD within the first time period, the first terminal device may send the response message BIG _ CHANNEL _ REPORT _ ACK to the corresponding second terminal device at the first time when receiving the second message.

For example, as shown in fig. 5C, R represents a BIG _ CHANNEL _ REPORT _ REQ message, and when the SELECT _ GROUP field indicates that the second terminal device sends C, i.e., BIG _ CHANNEL _ REPORT, the second terminal device receiving R sends C using CSMA/CD. The second terminal device receiving R may perform CSMA/CD transmission with an Inter Frame Gap (IFG) size from the beginning of the Offset period to the Offset period + Window period, and after receiving the BIG _ CHANNEL _ REPORT, the first terminal device may quickly transmit a, i.e., BIG _ CHANNEL _ REPORT _ ACK message at the time T after receiving C.

In a possible embodiment, the sending the third message to the second terminal device includes: and sending the third message to the second terminal equipment at a first moment after the second time period.

Specifically, when the SELECT _ GROUP field in the BIG _ CHANNEL _ REPORT _ REQ includes the second bit, that is, the second terminal device sends the BIG _ CHANNEL _ REPORT based on the CSMA/CD within the first time period, the first terminal device may send the response message BIG _ CHANNEL _ REPORT _ ACK to the corresponding second terminal device at the first time after the second time period.

For example, as shown in fig. 5b, after the first terminal device receives the BIG _ CHANNEL _ REPORT, the first terminal device sends a BIG _ CHANNEL _ REPORT _ ACK message at time T after the Window time period.

The first bit and the second bit may include one or more bits.

The first time period (Offset time period), the second time period (Window time period), the first time (T time), the first frequency, and the IFG may be arranged in the SELECT _ GROUP field, or parameters may be defined in advance as in the synchronous broadcast establishment.

The BIG _ CHANNEL _ REPORT _ REQ, BIG _ CHANNEL _ REPORT, and BIG _ CHANNEL _ REPORT _ ACK may be a newly added BIG Control message (BIG Control PDU).

Specifically, as shown in fig. 6a, the BIG _ CHANNEL _ REPORT _ REQ includes a message identification code REQ field based on a Logical Link (LL) message, a SELECT _ GROUP field, a CtrData field, and an Opcode field of a control message reply, and the SELECT _ GROUP field may include a collision avoidance mode, a receiver address, or other parameters related to collision avoidance. As shown in fig. 6b, the BIG _ CHANNEL _ REPORT contains a message identification code classification field of the LL message, a CHANNEL _ MAP field, a CtrData field, and an Opcode field for feeding back CHANNEL quality. As shown in fig. 6c, the BIG _ CHANNEL _ REPORT _ ACK includes a message id ACK field of the LL message, an ACK _ Info field, a CtrData field, and an Opcode field of the acknowledgment message, and the ACK _ Info field further includes information such as a message id and a sender address of the BIG _ CHANNEL _ REPORT.

S440, determining a first broadcast channel based on each of the broadcast channel assessment reports in the M second messages.

The first broadcast channel is a broadcast channel with the best channel quality in a plurality of broadcast channels. After the first terminal device collects the channel estimation reports fed back by the plurality of second terminal devices, the optimal broadcast channel can be obtained according to the channel estimation reports through comprehensive analysis.

Optionally, the method further includes: the first terminal device broadcasts the first broadcast channel to the second terminal device. Correspondingly, the second terminal device receives the first broadcast channel from the first terminal device.

Specifically, the first terminal device may bear the optimal broadcast CHANNEL in the BIG _ CHANNEL _ MAP _ IND to broadcast to each second terminal device, and the second terminal device may determine the broadcast CHANNEL after receiving the BIG _ CHANNEL _ MAP _ IND.

In the embodiment of the application, the second terminal device which synchronously broadcasts evaluates the channel quality, and feeds back the channel estimation to the first terminal device for more reasonable channel selection, so that the interference can be effectively avoided.

It can be seen that, in the broadcast channel evaluation method provided by the present application, a first terminal device broadcasts a first message in M number of synchronized broadcast control subevents, where the first message is used to request a second terminal device to send a broadcast channel evaluation report, the second terminal device receives the first message from the first terminal device and sends a second message to the first terminal device, where the second message includes the broadcast channel evaluation report that the second terminal device occupies a broadcast channel, the first terminal device receives second messages from M number of the second terminal devices respectively, the second message of the ith number of the second terminal device is a second message that the first terminal device receives in the ith number of synchronized broadcast control subevents, and the first terminal device determines a first broadcast channel based on each of the broadcast channel evaluation reports in the M number of the second messages. According to the method and the device, bidirectional control information transmission is carried out through unidirectional synchronous broadcasting, and channel selection is carried out through a broadcast channel assessment report fed back by the second terminal equipment, so that interference can be effectively avoided.

Referring to fig. 7, fig. 7 is a flowchart illustrating another method for evaluating a broadcast channel according to an embodiment of the present application, and the method is applied to the communication system shown in fig. 1. As shown in fig. 7, the method includes the steps of:

s710, the first terminal device sends a BIG _ CHANNEL _ REPORT _ REQ message to the second terminal device.

S720, the second terminal device receives the BIG _ CHANNEL _ REPORT _ REQ message and sends the BIG _ CHANNEL _ REPORT message to the first terminal device.

S730, the first terminal device receives the BIG _ CHANNEL _ REPORT message and then sends a BIG _ CHANNEL _ REPORT _ ACK message to the second terminal device.

The detailed description of the steps S710-S730 may refer to the corresponding steps described in the above fig. 4, and will not be described herein again.

The above description has introduced the solution of the embodiment of the present application mainly from the perspective of the method-side implementation process. It is understood that the electronic device comprises corresponding hardware structures and/or software modules for performing the respective functions in order to realize the above-mentioned functions. Those of skill in the art will readily appreciate that the present application is capable of hardware or a combination of hardware and computer software implementing the various illustrative elements and algorithm steps described in connection with the embodiments provided herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

Referring to fig. 8, fig. 8 is a block diagram illustrating functional units of an apparatus 800 for evaluating a broadcast channel according to an embodiment of the present application, where the apparatus 800 may be a first terminal device, and the apparatus 800 may also be a second terminal device, and the apparatus 800 includes: a transceiving unit 810 and a processing unit 820.

In a possible implementation manner, the apparatus 800 is configured to execute the respective procedures and steps corresponding to the first terminal device in the above method for evaluating a broadcast channel.

A transceiving unit 810, configured to broadcast a first message in the first M synchronized broadcast control sub-events, where the first message is used to request the second terminal device to send a broadcast channel assessment report;

the transceiver 810 is further configured to receive second messages from M second terminal devices, respectively, where the second messages include broadcast channel assessment reports that the second terminal devices occupy broadcast channels;

a processing unit 820 configured to determine a first broadcast channel based on the M broadcast channel assessment reports.

Optionally, the transceiver unit 810 is further configured to: and sending a third message to the second terminal equipment, wherein the third message is used for responding to the second message.

Optionally, the SELECT _ GROUP field includes a first bit, and the first bit is used to indicate a device identifier of the second terminal device.

Optionally, the SELECT _ GROUP field includes a second bit, where the second bit is used to instruct the second terminal device to send the second message based on a carrier sense multiple access/collision detection protocol CSMA/CD within a first time period, and the first time period includes a first time period and a second time period.

Optionally, in terms of sending the third message to the second terminal device, the transceiver unit 810 is specifically configured to: and transmitting the third message to the second terminal equipment on the first frequency.

Optionally, in terms of sending the third message to the second terminal device, the transceiver unit 810 is specifically configured to: and sending the third message to the second terminal equipment at a first moment after receiving the second message from the second terminal equipment.

Optionally, in terms of sending the third message to the second terminal device, the transceiver unit 810 is specifically configured to: and sending the third message to the second terminal equipment at a first moment after the second time period.

Optionally, the transceiver unit 810 is further configured to: broadcasting the first broadcast channel to the second terminal device.

In another possible implementation manner, the apparatus 800 is configured to execute the respective procedures and steps corresponding to the second terminal device in the foregoing method for evaluating a broadcast channel.

The transceiver unit 810 is configured to receive a first message from a first terminal device, where the first message is used to request the second terminal device to send a broadcast channel assessment report;

the transceiver 810 is further configured to send a second message to the first terminal device, where the second message includes the broadcast channel assessment report of the second terminal device occupying a broadcast channel.

Optionally, the transceiver unit 810 is further configured to: and receiving a third message from the first terminal equipment, wherein the third message is used for responding to the second message.

Optionally, the first message includes a SELECT _ GROUP field, where the SELECT _ GROUP field is used to indicate whether the second terminal device sends a broadcast channel assessment report.

Optionally, in terms of sending the second message to the first terminal device, the transceiver unit 810 is specifically configured to:

and sending a second message to the first terminal device under the condition that the SELECT _ GROUP field indicates that the second terminal device sends a broadcast channel evaluation report.

Optionally, in terms of receiving the third message from the first terminal device, the transceiver unit 810 is specifically configured to: receiving the third message from the first terminal device on a first frequency.

Optionally, the transceiver unit 810 is further configured to: a first broadcast channel is received from the first terminal device.

It should be appreciated that the apparatus 800 herein is embodied in the form of a functional unit. The term "unit" herein may refer to an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (e.g., a shared, dedicated, or group processor) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that support the described functionality. In an optional example, as can be understood by those skilled in the art, the apparatus 800 may be embodied as the first terminal device and the second terminal device in the foregoing embodiment, and the apparatus 800 may be configured to execute each procedure and/or step corresponding to the first terminal device and the second terminal device in the foregoing method embodiment, and is not described herein again to avoid repetition.

The apparatus 800 of each of the above schemes has a function of implementing corresponding steps executed by the first terminal device and the second terminal device in the above methods; the functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software comprises one or more modules corresponding to the functions; for example, the processing unit 820 may be replaced by a processor, and the transceiving unit 810 may be replaced by a transmitter and a receiver, respectively, to perform transceiving operations and related processing operations in the various method embodiments.

In an embodiment of the present application, the apparatus 800 in fig. 8 may also be a chip or a chip system, for example: system on chip (SoC). Correspondingly, the transceiver unit may be a transceiver circuit of the chip, and is not limited herein.

Referring to fig. 9, fig. 9 is a computer device according to an embodiment of the present application, where the computer device includes: one or more processors, one or more memories, one or more communication interfaces, and one or more programs; the one or more programs are stored in the memory and configured to be executed by the one or more processors.

In one possible implementation, the computer device is a first terminal device, and the program includes instructions for performing the following steps:

In another possible implementation manner, the computer device is a second terminal device, and the program includes instructions for executing the following steps:

receiving a first message from a first terminal device, the first message being used to request the second terminal device to send a broadcast channel assessment report;

All relevant contents of each scene related to the method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

It will be appreciated that the memory described above may include both read-only memory and random access memory, and provides instructions and data to the processor. The portion of memory may also include non-volatile random access memory. For example, the memory may also store device type information.

In the embodiment of the present application, the processor of the above apparatus may be a Central Processing Unit (CPU), and the processor may also be other general processors, digital Signal Processors (DSP), application Specific Integrated Circuits (ASIC), field Programmable Gate Arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It is to be understood that reference to "at least one" in the embodiments of the present application means one or more, and "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a alone, A and B together, and B alone, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.

And, unless stated to the contrary, the embodiments of the present application refer to the ordinal numbers "first", "second", etc., for distinguishing between a plurality of objects, and do not limit the sequence, timing, priority or importance of the plurality of objects. For example, the first information and the second information are different information only for distinguishing them from each other, and do not indicate a difference in the contents, priority, transmission order, importance, or the like of the two kinds of information.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software elements in a processor. The software elements may be located in ram, flash, rom, prom, or eprom, registers, among other storage media that are well known in the art. The storage medium is located in a memory, and a processor executes instructions in the memory, in combination with hardware thereof, to perform the steps of the above-described method. To avoid repetition, it is not described in detail here.

Embodiments of the present application also provide a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, and the computer program enables a computer to execute part or all of the steps of any one of the methods as described in the above method embodiments.

Embodiments of the present application also provide a computer program product comprising a non-transitory computer readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps of any of the methods as described in the above method embodiments. The computer program product may be a software installation package.

It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units is only one type of division of logical functions, and there may be other divisions when actually implementing, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiments of the present application.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit may be stored in a computer readable memory if it is implemented in the form of a software functional unit and sold or used as a stand-alone product. Based on such understanding, the technical solutions of the present application, in essence or part of the technical solutions contributing to the prior art, or all or part of the technical solutions, can be embodied in the form of a software product, which is stored in a memory and includes several instructions for causing a computer device (which may be a personal computer, a server, or a TRP, etc.) to execute all or part of the steps of the methods of the embodiments of the present application. And the aforementioned memory comprises: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable memory, which may include: flash disk, ROM, RAM, magnetic or optical disk, and the like.

The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A method for evaluating a broadcast channel, the method being applied to a first terminal device, the method comprising:

receiving second messages from the M second terminal devices, respectively, where the second messages include a broadcast channel assessment report that the second terminal device occupies a broadcast channel, and the second message of the ith second terminal device is a second message received by the first terminal device in an ith synchronous broadcast control subevent; i is less than or equal to M;

2. The method of claim 1, further comprising:

and sending a third message to the second terminal equipment, wherein the third message is used for responding to the second message.

3. The method of claim 2, wherein the first message comprises a SELECT _ GROUP field, and wherein the SELECT _ GROUP field is used to indicate whether the second terminal device sends the broadcast channel assessment report.

4. The method of claim 3, wherein the SELECT _ GROUP field comprises a first bit indicating a device identity of the second terminal device.

5. The method of claim 3, wherein the SELECT _ GROUP field comprises a second bit, and wherein the second bit is used to instruct the second terminal device to send the second message based on a carrier sense multiple access/collision detection protocol (CSMA/CD) within a first time period, and wherein the first time period comprises a first time period and a second time period.

6. The method of claim 5, wherein the sending the third message to the second terminal device comprises:

and transmitting the third message to the second terminal equipment on the first frequency.

7. The method of claim 6, wherein the sending the third message to the second terminal device comprises:

and sending the third message to the second terminal equipment at a first moment after receiving the second message from the second terminal equipment.

8. The method of claim 6, wherein the sending the third message to the second terminal device comprises:

and sending the third message to the second terminal equipment at a first moment after the second time period.

9. The method according to any one of claims 1-5, further comprising:

broadcasting the first broadcast channel to the second terminal device.

10. A method for evaluating a broadcast channel, the method being applied to a second terminal device, the method comprising:

sending a second message to the first terminal device, the second message including the broadcast channel assessment report that the second terminal device occupies a first broadcast channel;

the first broadcast channel is a first broadcast channel determined from the broadcast channel assessment report.

11. The method of claim 10, further comprising:

and receiving a third message from the first terminal equipment, wherein the third message is used for responding to the second message.

12. The method of claim 11, wherein the first message comprises a SELECT _ GROUP field, and wherein the SELECT _ GROUP field is used to indicate whether the second terminal device sends a broadcast channel assessment report.

13. The method of claim 12, wherein sending the second message to the first terminal device comprises:

and sending a second message to the first terminal equipment under the condition that the SELECT _ GROUP field indicates the second terminal equipment to send a broadcast channel evaluation report.

14. The method of claim 13, wherein the SELECT _ GROUP field comprises a first bit indicating a device identification of the second terminal device.

15. The method of claim 13, wherein the SELECT _ GROUP field comprises a second bit, and wherein the second bit is used to instruct the second terminal device to send the second message based on a carrier sense multiple access/collision detection protocol CSMA/CD for a first time period, and wherein the first time period comprises a first time period and a second time period.

16. The method of claim 15, wherein receiving the third message from the first terminal device comprises:

receiving the third message from the first terminal device on a first frequency.

17. The method according to any one of claims 10-16, further comprising:

a first broadcast channel is received from the first terminal device.

18. An apparatus for evaluating a broadcast channel, the apparatus being applied to a first terminal device, the apparatus comprising:

a transceiving unit, configured to broadcast a first message in a first M number of synchronized broadcast control subevents, where the first message is used to request a second terminal device to send a broadcast channel assessment report;

a processing unit configured to determine a first broadcast channel based on the M broadcast channel assessment reports.

19. An apparatus for evaluating a broadcast channel, the apparatus being applied to a second terminal device, the apparatus comprising:

the transceiver unit is further configured to send a second message to the first terminal device, where the second message includes the broadcast channel assessment report that the second terminal device occupies a first broadcast channel;

20. A first terminal device, characterized in that the first terminal device comprises a processor, a memory, a communication interface, and one or more programs, which are stored in the memory and configured to be executed by the processor, the programs comprising instructions for carrying out the steps in the method according to any one of claims 1-9.

21. A second terminal device, characterized in that the second terminal device comprises a processor, a memory, a communication interface, and one or more programs, which are stored in the memory and configured to be executed by the processor, the programs comprising instructions for carrying out the steps in the method according to any of claims 10-16.

22. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes a computer to perform the steps of the method according to any one of claims 1-9 or to perform the steps of the method according to any one of claims 10-16.