CN113677021B

CN113677021B - Data transmission method and related product

Info

Publication number: CN113677021B
Application number: CN202010416969.2A
Authority: CN
Inventors: 黎超
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2024-06-28
Anticipated expiration: 2040-05-15
Also published as: WO2021227946A1; CN113677021A

Abstract

The embodiment of the application provides a data transmission method and related products, comprising the following steps: the method comprises the steps that first equipment obtains first configuration information, wherein the first configuration information is used for indicating side uplink transmission parameters and first area information; the first device determines that the first device is located in a first area according to the first area information; the first device transmits sidelink data based on the sidelink transmission parameters. By adopting the embodiment of the application, the side line data can be sent in the configured area based on the configured side line transmission parameters, unnecessary emission and potential interference to the enhanced mobile broadband service can be reduced, and the communication quality is improved.

Description

Data transmission method and related product

Technical Field

The present application relates to the field of communications technologies, and in particular, to a data transmission method and related products.

Background

With the development of communication technology, cellular-Vehicle-to-evaluation (C-V2X) technology-based internet of vehicles communication has been rapidly developed. Sidelink (sidelink) is introduced to support direct communication between V2X devices. However, in the present analysis and discussion, the spectrum that can be dedicated to V2X is very scarce. To apply and promote V2X, one approach is to apply the spectrum of the enhanced mobile broadband (enhanced Mobile Broad Band) in the cellular link to the sidelink. However, using the frequency of the cellular link to the sidelink causes interference problems between the two links, resulting in poor communication quality between the cellular link and the sidelink. Therefore, how to solve the interference problem between two links is a technical problem that a person skilled in the art needs to solve.

Disclosure of Invention

The embodiment of the application discloses a data transmission method and related products, which can send side line data based on configured side line transmission parameters in a configured area, reduce unnecessary emission and potential interference to eMBB services, and improve communication quality.

In a first aspect, an embodiment of the present application discloses a data transmission method, including: the method comprises the steps that first equipment obtains first configuration information, wherein the first configuration information is used for indicating side uplink transmission parameters and first area information; the first device determines that the first device is located in a first area according to the first area information; the first device transmits sidelink data based on the sidelink transmission parameters. That is, if the device is located in the transmission area corresponding to the configuration information, the sidelink data may be transmitted according to the sidelink transmission parameter corresponding to the configuration information, which may reduce unnecessary transmission and potential interference to eMBB services of the first device, and improve communication quality.

In one possible example, the first region information is used to indicate at least one of: a first region, a roadside device within the first region, a first signal quality threshold, or a first distance threshold. Thus, the first device can be determined to be positioned in the first area according to the first area information, so that the communication quality is improved.

In one possible example, the side-link transmission parameters include side-link transmit power parameters and/or side-link communication frequencies. In this way, the device may perform side-link communication based on specific parameters, which may reduce unnecessary transmissions and potential interference to eMBB traffic by the first device, and improve communication quality.

In one possible example, the side-uplink transmit power parameter includes at least one of: a path loss factor, a maximum transmit power, an open loop transmit power, a power adjustment factor, at least one transmit power value. Thus, the side-link transmission power value can be dynamically set, the flexibility is improved, and the communication quality is improved.

In one possible example, the first region includes a first sub-region and a second sub-region, the at least one transmit power value includes a first transmit power value corresponding to the first sub-region and a second transmit power value corresponding to the second sub-region, and the first device transmits sidelink data based on the first transmit power value and/or the sidelink communication frequency at the first sub-region; or the first device transmits sidelink data based on the second transmit power value and/or the sidelink communication frequency at the second sub-region. Thus, different transmitting power values are adopted in different sub-areas to transmit side line data, and communication quality can be improved.

In one possible example, the first region information is further used to indicate a first sub-region and a second sub-region, and the first device determines whether to locate at the first sub-region or the second sub-region according to the first region information.

In one possible example, the first configuration information is further to indicate second region information, the second region information to determine a second region, the second region including the first region, and the second region being larger than the first region, the first device to receive sideline data on a sideline communication frequency in response to the first device determining to be located in the second region. Thus, if the device is located in the receiving area corresponding to the configuration information, other devices can receive the side uplink data sent by the other devices based on the side uplink transmission parameters, unnecessary transmission and potential interference to eMBB services of the first device can be reduced, the communication quality is improved, and the power consumption is saved.

In one possible example, a first device receives a first message sent by a roadside device; the first equipment acquires the signal quality of a first message; if the signal quality of the first message is greater than or equal to the first signal quality threshold, the first device determines to be located in the first region. In this manner, determining the first region based on the signal quality may ensure communication quality for side-link communications in the first region and reduce unnecessary transmissions and potential interference to eMBB traffic by the first device.

In one possible example, the first device determines a distance to the roadside device based on the geographic location of the roadside device and the geographic location of the first device; if the distance is less than or equal to the first distance threshold, the first device determines that the first device is located in the first area. In this manner, determining the first region based on the distance to the roadside devices within the first region may ensure communication quality for the side-link communications in the first region and reduce unnecessary transmissions and potential interference to eMBB traffic by the first device.

In one possible example, the first region information includes geographic location information, a number, or an identification of the first region. Therefore, the first area is determined according to different indication information, and the accuracy of determining the first area and the flexibility of configuring information can be improved.

In one possible example, the side-link communication frequency is different from the cellular-link communication frequency of the first region. Thus, the interference with the cellular link can be directly avoided, and the communication quality is improved.

In one possible example, the first configuration information is obtained from a base station; or obtained from a terminal device; or from a roadside device; or obtained from an application server. Thus, the flexibility and convenience of acquiring the configuration information are improved.

In a second aspect, an embodiment of the present application provides another data transmission method, including: the first equipment acquires second configuration information, wherein the second configuration information is used for indicating second area information and side uplink communication frequency; the first device determines that the first device is located in the second area according to the second geographic position information; the first device receives sidelink data on a sidelink communication frequency. That is, if the device is located in the receiving area corresponding to the configuration information, the sidelink data may be received according to the sidelink communication frequency corresponding to the configuration information, which may reduce unnecessary transmission and potential interference to eMBB services of the first device, and improve communication quality.

In one possible example, the first device comprises a terminal device or a roadside device. Thus, when the terminal device or the road side device determines that the terminal device or the road side device is located in the second area, the side uplink communication can be performed based on the second configuration information, interference with other links can be avoided, and communication quality can be improved.

In one possible example, the second region information includes geographic location information, a number, or an identification of the second region. Therefore, the second area is determined according to different indication information, and the accuracy of determining the second area and the flexibility of configuring information can be improved.

In one possible example, the second region information is used to indicate at least one of: a second region, a roadside device within the second region, a second signal quality threshold, or a second distance threshold. Thus, the first device can determine that the first device is positioned in the second area according to the second area information, so that the communication quality is improved.

In this example, the first device receives a second message sent by the roadside device; the first device obtains the signal quality of the second message; if the signal quality of the second message is greater than or equal to the second signal quality threshold, the first device determines that it is located in the second region. In this manner, determining the second region based on the signal quality may ensure communication quality for side-link communications in the second region and reduce unnecessary transmissions and potential interference to eMBB traffic by the first device.

In this example, the first device determines a distance to the roadside device based on the geographic location of the roadside device and the geographic location of the first device; if the distance is less than or equal to the second distance threshold, the first device determines that the first device is located in the second area. In this manner, determining the second region based on the distance to the roadside devices within the second region may ensure communication quality for the side-link communications in the second region and reduce unnecessary transmissions and potential interference to eMBB traffic by the first device.

In one possible example, the second configuration information is further used to indicate side-link transmission parameters including side-link transmit power parameters and/or side-link communication frequencies. In this way, the device may perform side-link communication based on specific parameters, which may reduce unnecessary transmissions and potential interference to eMBB traffic by the first device, and improve communication quality.

In this example, the side-uplink transmit power parameters include at least one of: a path loss factor, a maximum transmit power, an open loop transmit power, a power adjustment factor, at least one transmit power value. Thus, the side-link transmission power value can be dynamically set, the flexibility is improved, and the communication quality is improved.

In one possible example, the second configuration information is further used to indicate first area information, the first area information is used to determine a first area, the second area includes the first area, and the second area is larger than the first area, and the first device determines that the first device is located in the first area according to the first area information; the first device transmits sidelink data based on the sidelink transmission parameters. Therefore, the second area can also receive the side line data based on the second configuration information, interference with other links can be avoided, and communication quality and communication diversity can be improved.

In one possible example, the first region information is further used to determine a first sub-region and a second sub-region, the first region includes the first sub-region and the second sub-region, the first device determines that the first device is located in the first sub-region according to the first region information, and the first device transmits sideline data based on a first transmission power value and/or a sideline communication frequency corresponding to the first sub-region; and/or the first device determines that the first device is positioned in the second subarea according to the first area information, and the first device transmits the sidestream data based on the second transmission power value and/or the sidestream communication frequency corresponding to the second subarea. Thus, different transmitting power values are adopted in different areas, so that the communication quality can be improved, and the power consumption can be saved.

In one possible example, the side-link communication frequency is different from the cellular-link communication frequency of the second region. Thus, the interference generated by communication with the cellular link can be directly avoided, and the communication quality is improved.

In one possible example, the second configuration information is obtained from a base station; or obtained from a terminal device; or from a roadside device; or obtained from an application server. Thus, the flexibility and convenience of acquiring the configuration information are improved.

In a third aspect, an embodiment of the present application provides a further data transmission method, including: the second device transmits first configuration information and/or second configuration information, wherein the first configuration information is used for indicating the side-link transmission parameters and the first area information, and the second configuration information is used for indicating the second area information and the side-link communication frequency. That is, if the terminal device is located in the area corresponding to the configuration information, the side uplink communication can be performed according to the configuration information, so that necessary transmission and potential interference to eMBB services can be reduced, and the communication quality is improved.

In one possible example, the second device comprises a network device, a terminal device, a roadside device, or an application server. Thus, the flexibility of the equipment for acquiring the configuration information is improved.

In this example, the roadside device and/or the terminal device receives the first configuration information and/or the second configuration information sent by the network device or the application server; the road side equipment and/or the terminal equipment determines that the distance between the road side equipment and the first equipment is smaller than or equal to a preset threshold value, and sends first configuration information and/or second configuration information to the first equipment. That is, the device may obtain configuration information for the current geographic location, which may improve communication quality, reduce signaling overhead of the network, and save power consumption.

In one possible example, the first region information is used to indicate at least one of: the method comprises the steps of a first area, road side equipment in the first area, a first signal quality threshold or a first distance threshold; the second area information is used to indicate at least one of: a second region, a roadside device within the second region, a second signal quality threshold, or a second distance threshold. Thus, the first device can determine the first area according to the first area information and determine the second area according to the second area information, so that the communication quality is improved.

In one possible example, the side-link transmission parameters include side-link transmit power parameters and/or side-link communication frequencies. In this way, the device may perform side-link communications based on specific parameters, which may reduce unnecessary transmissions and potential interference to eMBB traffic, and improve communications quality.

In one possible example, the first region information is further used to indicate a first sub-region and a second sub-region, the first region including the first sub-region and the second sub-region, the at least one transmit power value including a first transmit power value corresponding to the first sub-region and a second transmit power value corresponding to the second sub-region. Thus, different transmitting power values are adopted in different sub-areas to transmit side line data, and communication quality can be improved.

In one possible example, the first configuration information is further used to indicate second region information, the second region information being used to determine a second region, the second region including the first region and the second region being larger than the first region. In this way, the transmission and reception areas are defined, communication quality can be improved, and power consumption can be saved.

In one possible example, the first region information includes geographic location information, number, or identification of the first region, and the second region information includes geographic location information, number, or identification of the second region. Thus, the area is determined according to different indication information, and the accuracy of determining the area and the flexibility of configuring the information can be improved.

In one possible example, the side-link communication frequency is different from the cellular-link communication frequency of the second area determined by the second area information. Thus, the interference generated by communication with the cellular link can be directly avoided, and the communication quality is improved.

In a fourth aspect, an embodiment of the present application provides a communication apparatus, including: the receiving and transmitting unit is used for acquiring first configuration information, wherein the first configuration information is used for indicating the side uplink transmission parameters and the first area information; the processing unit is used for determining that the first region is located according to the first region information; and the receiving and transmitting unit is also used for transmitting the side uplink data based on the side uplink transmission parameters. That is, if the device is located in the transmission area corresponding to the configuration information, the sidelink data may be transmitted according to the sidelink transmission parameter corresponding to the configuration information, so that unnecessary transmission and potential interference to eMBB services may be reduced, and the communication quality may be improved.

Optionally, the first area information is used to indicate at least one of the following: a first region, a roadside device within the first region, a first signal quality threshold, or a first distance threshold. Thus, the first area can be determined according to the first area information, so that the communication quality is improved.

Optionally, the side-link transmission parameters include side-link transmission power parameters and/or side-link communication frequencies. In this way, the device may perform side-link communications based on specific parameters, which may reduce unnecessary transmissions and potential interference to eMBB traffic, and improve communications quality.

Optionally, the side-uplink transmit power parameter includes at least one of: a path loss factor, a maximum transmit power, an open loop transmit power, a power adjustment factor, at least one transmit power value. Thus, the side-link transmission power value can be dynamically set, the flexibility is improved, and the communication quality is improved.

Optionally, the first region includes a first sub-region and a second sub-region, the sidelink transmission power parameter includes a first transmission power value corresponding to the first sub-region and a second transmission power value corresponding to the second sub-region, and the transceiver unit is specifically configured to transmit sidelink data in the first sub-region based on the first transmission power value and/or the sidelink communication frequency; and/or transmitting sidelink data based on the second transmit power value and/or the sidelink communication frequency at the second sub-region. Thus, different transmitting power values are adopted in different sub-areas to transmit side line data, and communication quality can be improved.

Optionally, the first area information is further used for indicating the first sub-area and the second sub-area, and the transceiver unit is further used for determining whether the first sub-area or the second sub-area is located according to the first area information.

Optionally, the first configuration information is further used for indicating second area information, the second area information is used for determining a second area, the second area comprises a first area and the second area is larger than the first area, and the transceiver unit is further used for receiving the sidestream data on the sidestream communication frequency in response to determining that the second area is located. Thus, if the device is located in the receiving area corresponding to the configuration information, the device can receive the side uplink data sent by other devices based on the side uplink transmission parameters, so that unnecessary transmission and potential interference to eMBB services can be reduced, the communication quality is improved, and the power consumption is saved.

Optionally, the transceiver unit is further configured to receive a first message sent by the roadside device; the processing unit is specifically configured to obtain signal quality of the first message; if the signal quality of the first message is greater than or equal to the first signal quality threshold, determining that the first message is located in the first area. In this manner, determining the first region based on the signal quality may ensure communication quality for side-link communications in the first region and reduce unnecessary transmissions and potential interference to eMBB traffic.

Optionally, the processing unit is further configured to determine a distance between the communication device and the road side device according to the geographic location of the road side device and the geographic location of the communication device; if the distance is less than or equal to the first distance threshold, the first device determines that the first device is located in the first area. In this manner, determining the first region based on the distance to the roadside devices within the first region may ensure communication quality for the side-link communications in the first region and reduce unnecessary transmissions and potential interference to eMBB traffic.

Optionally, the first region information includes geographical location information, a number or an identification of the first region. Therefore, the first area is determined according to different indication information, and the accuracy of determining the first area and the flexibility of configuring information can be improved.

Optionally, the side-link communication frequency is different from the cellular-link communication frequency of the first region. Thus, the interference with the cellular link can be directly avoided, and the communication quality is improved.

Optionally, the first configuration information is obtained from a network device; or obtained from a terminal device; or from a roadside device; or obtained from an application server. Thus, the flexibility and convenience of acquiring the configuration information are improved.

In a fifth aspect, an embodiment of the present application provides another communication apparatus, including: the receiving and transmitting unit is used for acquiring second configuration information, wherein the second configuration information is used for indicating second area information and side uplink communication frequency; the processing unit is used for determining that the second region is located according to the second region information; and the receiving and transmitting unit is also used for receiving the side uplink data on the side uplink communication frequency. That is, if the device is located in the receiving area corresponding to the configuration information, the sidelink data can be received according to the sidelink communication frequency corresponding to the configuration information, so that unnecessary transmission and potential interference to eMBB services can be reduced, and the communication quality is improved.

Optionally, the first device includes a terminal device or a road side device. Thus, when the terminal device or the road side device determines that the terminal device or the road side device is located in the second area, the side uplink communication can be performed based on the second configuration information, interference with other links can be avoided, and communication quality can be improved.

Optionally, the second configuration information is further used to indicate side-link transmission parameters, including side-link transmission power parameters and/or side-link communication frequency. In this way, the device may perform side-link communications based on specific parameters, which may reduce unnecessary transmissions and potential interference to eMBB traffic, and improve communications quality.

Optionally, the side-link communication frequency is different from the cellular-link communication frequency of the second region.

Optionally, the second region information includes geographical location information, a number or an identification of the second region. Therefore, the second area is determined according to different indication information, and the accuracy of determining the second area and the flexibility of configuring information can be improved.

Optionally, the second area information is used to indicate at least one of the following: a second region, a roadside device within the second region, a second signal quality threshold, or a second distance threshold. Thus, the first device can determine that the first device is positioned in the second area according to the second area information, so that the communication quality is improved.

Optionally, the transceiver unit is further configured to receive a second message sent by the roadside device; the processing unit is specifically configured to obtain signal quality of the second message; and if the signal quality of the second message is greater than or equal to the second signal quality threshold, determining that the second message is located in the second area. In this manner, determining the second region based on the signal quality may ensure communication quality for side-link communications in the second region and reduce unnecessary transmissions and potential interference to eMBB traffic.

Optionally, the processing unit is further configured to determine a distance between the communication device and the road side device according to the geographic location of the road side device and the geographic location of the communication device; and if the distance is smaller than or equal to the second distance threshold, determining that the second region is located. In this manner, determining the second region based on the distance to the roadside devices within the second region may ensure communication quality for the side-link communications in the second region and reduce unnecessary transmissions and potential interference to eMBB traffic.

Optionally, the second area information is further used for indicating first area information, the first area information is used for determining a first area, the second area comprises the first area, the second area is larger than the first area, and the transceiver unit is further used for determining that the first area is located according to the first area information; the sidelink data is transmitted based on the sidelink transmission parameters.

Optionally, the first area information is further used for determining a first sub-area and a second sub-area, the first area comprises the first sub-area and the second sub-area, the transceiver unit is further used for determining that the first sub-area is located according to the first area information, and transmitting side line data based on a first transmission power value and/or a side uplink communication frequency corresponding to the first sub-area; and/or determining that the second sub-area is located according to the first area information, and transmitting side line data based on a second transmission power value and/or side line communication frequency corresponding to the second sub-area. Thus, different transmitting power values are adopted in different areas, so that the communication quality can be improved, and the power consumption can be saved.

Optionally, the second configuration information is obtained from the network device; or obtained from a terminal device; or from a roadside device; or obtained from an application server. Thus, the flexibility and convenience of acquiring the configuration information are improved.

In a sixth aspect, an embodiment of the present application provides a further communication apparatus, including: and the receiving and transmitting unit is used for transmitting first configuration information and/or second configuration information, wherein the first configuration information is used for indicating the side-link transmission parameters, the first area information and the second configuration information is used for indicating the second area information and the side-link communication frequency. That is, if the terminal device is located in the area corresponding to the configuration information, the side uplink communication can be performed according to the configuration information, so that necessary transmission and potential interference to eMBB services can be reduced, and the communication quality is improved.

Optionally, the side-link communication frequency is different from the cellular-link communication frequency of the second area determined by the second area information. Thus, the interference generated by communication with the cellular link can be directly avoided, and the communication quality is improved.

Optionally, the second device comprises at least one of: network equipment, terminal equipment, road side equipment and an application server. Thus, the flexibility of the equipment for acquiring the configuration information is improved.

Optionally, the transceiver unit of the road side device and/or the terminal device is specifically configured to receive the first configuration information and/or the second configuration information sent by the network device and/or the application server; and determining that the distance between the first configuration information and the other communication device is smaller than or equal to a preset threshold value, and sending the first configuration information and/or the second configuration information to the other communication device. That is, the device may obtain configuration information for the current geographic location, which may improve communication quality, reduce signaling overhead of the network, and save power consumption.

Optionally, the first area information is used to indicate at least one of the following: the method comprises the steps of a first area, road side equipment in the first area, a first signal quality threshold or a first distance threshold; the second area information is used to indicate at least one of: a second region, a roadside device within the second region, a second signal quality threshold, or a second distance threshold. Thus, the first device can determine that the first device is located in the first area according to the first area information, and the first device can determine that the first device is located in the second area according to the second area information, so that the communication quality is improved.

Optionally, the first region information is further used for indicating a first sub-region and a second sub-region, the first region includes the first sub-region and the second sub-region, and the at least one transmission power value includes a first transmission power value corresponding to the first sub-region and a second transmission power value corresponding to the second sub-region. Thus, different transmitting power values are adopted in different sub-areas to transmit side line data, and communication quality can be improved.

Optionally, the first configuration information is further used to indicate second area information, the second area information is used to determine a second area, the second area includes a first area, and the second area is larger than the first area. In this way, the transmission and reception areas are defined, communication quality can be improved, and power consumption can be saved.

Optionally, the first region information includes geographical location information, a number or an identification of the first region, and the second region information includes geographical location information, a number or an identification of the second region. Thus, the area is determined according to different indication information, and the accuracy of determining the area and the flexibility of configuring the information can be improved.

The communication device in the above aspect may be a network device, a terminal device, a road side device, or an application server, or may be a chip applied to these devices or other combination devices, components, or the like capable of realizing the functions of the above devices. When the communication device is a network device, a terminal device, a road side device or an application server, the transceiver unit may be a transmitter and a receiver, or an integrated transceiver may include an antenna and a radio frequency circuit, etc., and the processing unit may be a processor, such as a baseband chip, etc. When the communication device is a component having the above-mentioned device function, the transceiver unit may be a radio frequency unit, and the processing unit may be a processor. When the communication device is a chip system, the transceiver unit may be an input/output interface of the chip system, and the processing unit may be a processor of the chip system, for example: a central processing unit (central processing unit, CPU).

In a seventh aspect, the present application provides a computer readable storage medium having instructions stored therein which, when run on a computer, cause the computer to perform the method of any of the above aspects.

In an eighth aspect, the present application provides a computer program product for storing a computer program for causing a computer to perform the method of any one of the preceding aspects when the computer program is run on the computer.

In a ninth aspect, the present application provides a chip comprising a processor for calling from a memory and executing instructions stored in the memory, such that a terminal device on which the chip is mounted performs the method of any of the above aspects.

In a tenth aspect, the present application provides another chip, which may be a chip in a first device or a second device, the chip comprising: the input interface, the output interface and the processing circuit are connected through an internal connecting path, and the processing circuit is used for executing the method of any aspect.

In an eleventh aspect, the present application provides another chip comprising: the input interface, the output interface, the processor, and optionally, a memory, where the input interface, the output interface, the processor, and the memory are connected by an internal connection path, the processor is configured to execute a code in the memory, and when the code is executed, the processor is configured to execute a method in any of the foregoing aspects.

In a twelfth aspect, an embodiment of the present application provides a communication apparatus, including: a memory for storing instructions; at least one processor for invoking and executing instructions from memory to cause the communication device to perform the steps of any of the above aspects.

In a thirteenth aspect, an embodiment of the present application provides a communication system including the first device and the second device in any one of the above aspects.

Drawings

The drawings used in the embodiments of the present application are described below.

Fig. 1A and fig. 1B are schematic structural diagrams of a communication system according to an embodiment of the present application;

fig. 2 is a schematic flow chart of a data transmission method according to an embodiment of the present application;

FIGS. 3A and 3B are schematic views of a first region according to an embodiment of the present application;

Fig. 4 is a flow chart of another data transmission method according to an embodiment of the present application;

fig. 5 is a flow chart of another data transmission method according to an embodiment of the present application;

fig. 6 is a schematic flow chart of a communication device according to an embodiment of the present application;

fig. 7 is a flowchart of another communication apparatus according to an embodiment of the present application.

Detailed Description

Embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

Referring to fig. 1A, fig. 1A is a schematic structural diagram of a first communication system according to an embodiment of the present application, where the communication system includes a first terminal device 102, a second terminal device 104, an application server 103, and a network device 106. The first terminal device 102 may communicate with the second terminal device 104 directly, or may communicate with the second terminal device 104 through the network device 106. The first terminal device 102 and the second terminal device 104 may refer to devices that provide voice and/or data connections to a user, may also be connected to a computing device such as a laptop computer or desktop computer, or they may be separate devices such as a Personal Digital Assistant (PDA) or the like. The first terminal device 102 and the second terminal device 104 may each be a User Equipment (UE), such as a vehicle, an On-Board Unit (OBU), a subscriber Unit, a subscriber station, a mobile station, a remote station, an access point, a remote terminal, an access terminal, a user agent, or a user device. The first terminal device 102 and the second terminal device 104 may also be chips, such as processors, etc.

The application server 103 may be a server of the intelligent transportation system (INTELLIGENT TRAFFIC SYSTEMS, ITS), a server of an application related to a vehicle such as navigation and charging, or the like, and is not limited herein.

Network device 106 may be a base station, an access point, a node, an evolved node (environment Bureau, eNB), or a 5G base station (next generation base station, gNB), referring to devices in an access network that communicate with wireless terminals over an air interface through one or more sectors. The access network may include an internet protocol network by converting received air interface frames into internet protocol (Internet Protocol, IP) packets, the base station may act as a router between the wireless terminal and the rest of the access network. The base station may also coordinate the management of attributes of the air interface.

The communication system may be applied to a C-V2X system, but may also be applied to other communication systems, such as a public land mobile network (public land mobile network, PLMN), a device-to-device (D2D) network, a machine-to-machine (machine to machine, M2M) network, an internet of things (internet of things, ioT) or other networks, etc., without limitation herein.

The communication system is mainly used for side link (sidelink) communication. As shown in fig. 1A, a first terminal device 102 and a second terminal device 104 may communicate over a cellular link through a network device 106. The network device 106 may send the first configuration information to the first terminal device 102 and the second configuration information to the second terminal device 104. The first configuration information is used to indicate how the first terminal device 102 transmits sidestream data, and the second configuration information is used to indicate how the second terminal device 104 transmits sidestream data. Accordingly, the first terminal device 102 may transmit sidestream data to the second terminal device 104 based on the first configuration information, and receive sidestream data or cellular data transmitted by the second terminal device 104 based on the second configuration information.

Referring to fig. 1B, fig. 1B is a schematic structural diagram of a second communication system according to an embodiment of the present application, where the communication system includes a first terminal device 102, a second terminal device 104, an application server 103, a network device 106, and a Road Side Unit (RSU) 105. In the present application, the RSU may be a UE in a communication system or a base station in a communication system. Optionally, when the RSU is a base station, the RSU may be a macro base station or a micro base station, which is not limited in the present application. If the RSU is the UE, the link between the RSU and the UE is a side uplink (sideink); if the RSU is a base station, the link between the RSU and the UE is a cellular link (including uplink and/or downlink). The optional RSU may be mounted in a fixed location or on an object, or may be mounted in a mobile physical location, and the term RSU in the present application is not limited to a location or a scene.

The first terminal device 102, the second terminal device 104, the application server 103, and the network device 106 may be described with reference to fig. 1A, and will not be described herein. The roadside device 105, which is a device with a relatively fixed position in the area corresponding to the first terminal device 102 and the second terminal device 104, may be used to forward the indication information of the network device 106, or receive or forward the data of the terminal devices such as the first terminal device 102 or the second terminal device 104.

In fig. 1B, the network device 106 may first send the first configuration information of the first terminal device 102 and the second configuration information of the second terminal device 104 to the roadside device 105. By the roadside device 105 forwarding the configuration information in the network device 106 as the transmitting end of the first terminal device 102 and the second terminal device 104, the first terminal device 102 and the second terminal device 104 may communicate through the network device 106 (or the roadside device 105 therein), or the first terminal device 102 and the second terminal device 104 may perform side-link communication based on the first configuration information or the second configuration information.

For example, if the roadside apparatus 105 is placed in a traffic light on a road, the first terminal apparatus 102 is a cellular phone in a vehicle driven on the road or is an in-vehicle terminal installed in an automobile, and the second terminal apparatus 104 is another vehicle driven on the road, the roadside apparatus 105 transmits the first configuration information to the first terminal apparatus 102 when the first terminal apparatus 102 is within the receivable range of the roadside apparatus 105. When the second location 102 is within the receivable range of the roadside device 105, the roadside device 105 transmits second configuration information to the second terminal device 104. The first terminal device 102 may be in side-link communication with the second terminal device 104 based on the first configuration information, and the second terminal device 104 may be in side-link communication with the first terminal device 102 based on the second configuration information.

The roadside device 105 may also serve as a receiving end of the first terminal device 102, i.e. in case the second terminal device 104 comprises the roadside device 105, the first terminal device 102 and the roadside device 105 perform cellular link communication first, and then the roadside device 105 sends first configuration information to the first terminal device 102, and the first terminal device 102 performs side link communication with the roadside device 105 based on the first configuration information.

For example, if the roadside apparatus 105 is placed in a toll collector of a toll station on an expressway, the first terminal apparatus 102 is a vehicle traveling on the expressway or is an in-vehicle terminal installed in an automobile, and when the first terminal apparatus 102 is within the receivable range of the roadside apparatus 105, the roadside apparatus 105 transmits first configuration information to the first terminal apparatus 102. The first terminal device 102 may perform side-link communication with the roadside device 105 based on the first configuration information, so that the roadside device 105 may acquire the traveling information of the first terminal device 102 and fee deduction information such as a bound fee deduction account, and charge based on the above information. And other third-party applications are not required to be installed, and user operation is not required, so that the convenience of operation is improved.

For another example, if the roadside device 105 is placed in a parking lot in a mall and the first terminal device 102 is a mobile phone of the user, when the user is in the mall and the first terminal device 102 is located within the receivable range of the roadside device 105, the roadside device 105 sends the first configuration information to the first terminal device 102. The first terminal device 102 may perform side-link communication with the road side device 105 based on the first configuration information, so that the first terminal device 102 may obtain, through the road side device 105, a parkable location and a navigation route in a parking lot, or location information, promotional information, etc. of each store in a mall, so as to facilitate shopping by a user.

With the development of wireless communication technology, there is an increasing demand for high data transmission rates and user experiences, while there is an increasing demand for proximity services for knowing and communicating with surrounding persons or things, so D2D communication technology has grown. The application of the D2D technology can reduce the burden of a cellular network, reduce the battery power consumption of terminal equipment, improve the data transmission rate and well meet the requirement of adjacent service. D2D technology allows multiple D2D enabled UEs to conduct direct discovery and direct communication with or without network infrastructure. In view of the characteristics and advantages of the D2D technology, a vehicle networking application scenario based on the D2D technology is proposed, but due to concerns about security, the requirement on time delay in the scenario is very high, and the existing D2D technology cannot be realized.

Thus under the network of long term evolution (long term evolution, LTE) technology proposed by 3GPP, V2X internet of vehicles technology was proposed, V2X communication refers to communication of vehicles with anything outside, including vehicle-to-vehicle communication (vehicle to vehicle, V2V), vehicle-to-pedestrian communication (vehicle to pedestrian, V2P), vehicle-to-infrastructure communication (vehicle to infrastructure, V2I), vehicle-to-network communication (vehicle to network, V2N). V2X communication is a basic technology and a key technology applied to high-speed equipment represented by vehicles in the scene with very high requirements on communication delay in the future, such as intelligent automobiles, automatic driving, intelligent transportation systems and the like.

The LTE V2X communication may support communication scenarios with and without network coverage, and the resource allocation manner may be a network access device scheduling mode, such as an evolved universal terrestrial radio access network Node B (E-UTRAN Node B, eNB) scheduling mode and a UE self-selection mode. Based on V2X technology, a vehicle user (V-UE) can send some information of itself, such as information of position, speed, intention (e.g. turning, doubling, reversing) and some aperiodic event-triggered information to surrounding V-UEs, and similarly, the V-UE can also receive information of surrounding users in real time.

LTE V2X addresses some of the partially basic requirements in V2X scenarios, but for future fully intelligent driving, autopilot, etc. application scenarios, LTE V2X at the present stage is not yet supported effectively. With the advancement of 5G NR technology in the 3GPP standards organization, 5G NR v2x will also develop further. To conserve frequency resources, the spectrum of the enhanced mobile broadband (enhanced Mobile Broad Band) in the cellular link is applied to the sidelink. However, using the frequency of the cellular link to the sidelink causes interference problems between the two links, resulting in poor communication quality.

In order to solve the above technical problems, in the embodiments of the present application, the network device determines or dynamically configures configuration information of the side uplink communication in advance, so that the terminal device or the road side device in the area can perform the side uplink communication. The configuration information is used to indicate the side-link transmission parameters, as well as geographical location information of the designated area. The configuration information may be configured by the network device according to each area, that is, different areas, or different types of areas, the configuration information of which is different. The configuration information may also be configured according to each roadside device, that is, the roadside devices of different areas, or the different types of roadside devices, the configuration information of which is different. The configuration information may also be configured according to each terminal device, that is, different terminal devices, or different types of terminal devices, where the configuration information is different, and the present application is not limited thereto.

It can be appreciated that after the terminal device obtains the configuration information, the side-link communication can be performed in the designated area based on the preset side-link transmission parameter, so that interference with the cellular link can be avoided, and communication quality can be improved.

Specifically, referring to fig. 2, fig. 2 is a data transmission method provided in an embodiment of the present application, where the method is applied to a first device, and includes, but is not limited to, the following steps:

step S202: the first device obtains first configuration information from the second device, the first configuration information indicating side-uplink transmission parameters, and first region information.

In the embodiment of the present application, the first device is a terminal device, for example, the first terminal device 102 shown in fig. 1A. The second device may be the network device 106 and the second terminal device 104 described in fig. 1A and 1B, or the application server 103 and the roadside device 105 described in fig. 1B. Thus, the flexibility of acquiring the first configuration information is improved.

When the second device includes a terminal device, the first device obtaining first configuration information from the second device includes: the first device obtains first configuration information forwarded by the network device and/or the application server from other terminal devices. And when the second device comprises a roadside device, the first device obtaining the first configuration information from the second device comprises: the first device obtains first configuration information forwarded by the network device and/or the application server from the road side device. Therefore, the configuration information received by the first equipment from the network equipment or the application server can be reduced, and the signaling overhead of the network is reduced.

Optionally, when the first device determines that the distance between the first device and the other terminal device is smaller than the preset threshold, the first device acquires the first configuration information forwarded by the network device and/or the application server from the other terminal device. And/or when the first device determines that the distance between the first device and the road side device is smaller than the preset threshold value, the first device acquires the first configuration information forwarded by the network device and/or the application server from the road side device. That is, the configuration information is obtained only when the distance meets the preset condition, that is, the configuration information is obtained for the geographic position of the first device, so that the communication quality can be improved, the signaling overhead of the network can be reduced, and the power consumption of the first device can be saved.

In the embodiment of the application, the side link transmission parameter is used for indicating the transmission method of the side link data. The sidelink transmission parameters include sidelink transmit power parameters for instructing the first device to transmit sidelink data. Wherein the side-uplink transmit power parameter comprises at least one of: a path loss factor, a maximum transmit power, an open loop transmit power, a power adjustment factor, at least one transmit power value. The transmission power value Ptx satisfies the following formula,

Ptx=pmax+Δ - (log ₂(M)+alpha*L+P₀); or alternatively

Ptx＝min{Pmax，Pmax+Δ-(log₂(M)+alpha*L+P₀)}

Wherein Pmax is the maximum transmitting power, delta is a power adjustment parameter, M is the bandwidth of transmitted data, alpha is a path loss factor, L is path loss, and P ₀ is an open loop transmitting power parameter.

According to the above formula, the transmission power value of the first device is inversely variable with at least one of the path loss, the open loop transmission power, the transmission bandwidth and the path loss factor between the first device and the device to be communicated. That is, as the distance between the first device and the device to be communicated is further, the larger the path loss is, the smaller the transmission power value is. For example, when the first device is at the edge of the first region, the transmit power of the first device is smaller; conversely, when the first device is in a more central region of the first region, the first device transmits a greater transmit power. Thus, when eMBB frequencies are used for sidelink, transmission on the sidelink may be controlled to a smaller extent.

It will be appreciated that the sidelink transmission parameters include sidelink transmission power, and that even when the sidelink communication frequency is the same as the cellular link communication frequency, the influence of the sidelink communication on the cellular link communication can be controlled by the sidelink transmission power, thereby avoiding interference between the two links and improving the communication quality.

In the embodiment of the application, the side-link transmission parameters further comprise side-link communication frequency, and the side-link communication frequency is used for indicating to send or receive side-link data. Optionally, the side-link communication frequency is different from the cellular-link communication frequency. Further, the side-link communication frequency may be different from the cellular link communication frequency in the first region or the second region. It will be appreciated that when the side link communication frequency is different from the cellular link communication frequency, the side link communication is performed without affecting the cellular link communication, thereby avoiding interference between the two links and improving the communication quality.

In the embodiment of the present application, the first area information is used to indicate a first area, a roadside device in the first area, a first signal quality threshold, a first distance threshold, and the like. The first area may be any area, or may be an area in which side-link communication is limited, or the like, or a geographical area in which the first area performs side-link communication.

The first region information may include geographical location information of the first region, for example, latitude and longitude information, information of a horizontal direction and a vertical direction embodied with satellite coordinates. The first area information also includes the number of the first area, for example, the highway G10, a serial number stored in the base station, and the like. The first area information may also be an identification of the first area, e.g. a name or the like. Based on the information, a geographic location of the first region may be determined. The first area information may also include information for determining the roadside device, such as geographical location information, a number or an identification of the roadside device. Therefore, the first area is determined according to different indication information, and the accuracy of determining the first area and the flexibility of configuring information can be improved.

The first signal quality threshold and the first distance threshold are used to determine that the first device is located in the first area. In one possible example, a first device receives a first message sent by a roadside device within a first region; the first device obtains the signal quality of the first message; if the signal quality is greater than or equal to the first signal quality threshold, the first device determines that the first device is located in the first region.

The first message may be a data acquisition request sent by the road side device, or a message specially used for testing signal quality, or may be a geographic location of the road side device, which is not limited herein.

Optionally, the SIGNAL Quality may be one or more of reference SIGNAL received Power (REFERENCE SIGNAL RECEIVING Power, RSRP), received SIGNAL strength Indication (RECEIVED SIGNAL STRENGTH Indication, RSSI), reference SIGNAL received Quality (REFERENCE SIGNAL RECEIVING Quality, RSRQ), SIGNAL to interference and NOISE RATIO (Signal to Interference plus Noise Ratio, SINR), SIGNAL to NOISE RATIO (SNR or S/N), channel Quality Indication (Channel Quality Indicator, CQI). The threshold for signal quality is also defined in terms of parameters that are the same as the signal quality. It can be appreciated that the first device determines that the first device is located in the first area according to the signal quality of the first message sent by the roadside device being greater than or equal to the first signal quality threshold, thereby ensuring the communication quality and reducing unnecessary transmission and potential interference to eMBB services by the first device.

In a second possible example, the first device determines a distance to the roadside device based on the geographic location of the roadside device and the geographic location of the first device; if the distance is less than or equal to the first distance threshold, the first device determines that the first device is located in the first area. It can be appreciated that the first device determines that the first device is located in the first area based on the distance from the roadside device being less than or equal to the first distance threshold, thereby ensuring communication quality and reducing unnecessary transmissions and potential interference to eMBB traffic by the first device.

In a third possible example, the first device determines to be located in the first region if the signal quality is greater than or equal to a first signal quality threshold and the distance is less than or equal to a first distance threshold. That is, when the signal quality and distance meet the threshold for side-link communications at the same time, the communication quality may be further improved and unnecessary transmissions and potential interference to eMBB traffic by the first device may be reduced.

In an embodiment of the present application, the first region may include a plurality of sub-regions, and as shown in fig. 3A, the first region 302 includes a first sub-region 3022 and a second sub-region 3024. Optionally, the first region information is further used to indicate the first sub-region and the second sub-region. As such, the first device may determine whether to locate at the first sub-region or the second sub-region based on the first region information.

The first region may also be surrounded by other regions as sub-regions. As shown in fig. 3B, the second region 30 includes a first region 302 and a third region 304. Optionally, the first configuration information is further used to indicate second area information, the second area information is used to determine a second area, the second area includes a first area, and the second area is larger than the first area. In this manner, the first device may determine that it is located in the second region based on the second region information. The regions shown in fig. 3A and 3B are exemplified by circles, and the regions may be other shapes, which are not limited thereto.

Step S204: the first device determines that the first device is located in the first area according to the first area information.

The description of the first area information in step S202 may be referred to in step S204, and will not be repeated here.

Step S206: the first device transmits sidelink data based on the sidelink transmission parameters.

In embodiments of the present application, the first device may send sidelink data to devices within a receivable range based on the sidelink transmission parameters. The device may be a terminal device located in the second area, or may be a roadside device located in the first area. For example, the second terminal device 104 shown in fig. 1A, and the roadside device 105 shown in fig. 1B.

Optionally, step S206 includes: the first device transmits sidelink data based on the first transmit power value and/or the sidelink communication frequency in the first sub-region; or the first device transmits sidelink data based on the second transmit power value and/or the sidelink communication frequency at the second sub-region.

As previously described, the configuration information may be related to a region, and thus, the transmission power value in the side-uplink transmission parameter acquired from the configuration information may be related to a region, i.e., the first transmission power value corresponds to the first sub-region and the second transmission power value corresponds to the second sub-region. The embodiment of the present application does not limit the magnitude relation between the first transmission power value and the second transmission power value, as shown in fig. 3A, the first sub-region 3022 is located at the center position of the first region 302, and the second sub-region 3024 is located at the edge position of the first region 302. Since the transmission power value and the path loss are inversely related, the first transmission power value may be greater than or equal to the second transmission power value. It can be appreciated that using different transmit power values in different regions can improve communication quality and save power consumption.

Optionally, in response to the first device determining to be located in the second region, the first device receives sidelink data on the sidelink communication frequency.

In this specification, "responsive to" may also mean or be understood to mean "when," or "if," etc. indicate the meaning of a condition and judgment.

That is, the second area serves as a receiving area of the first device, receives sidestream data transmitted by other communication apparatuses, and improves diversity of communication.

In one possible example, as shown in fig. 3B, an area other than the first area in the second area is taken as a third area, side line data is not transmitted to the first device, or a transmission power value when located in the third area is smaller than or equal to a transmission power value when located in the first area. As described above, the larger the path loss is, the smaller the transmission power value thereof is, and therefore, the transmission power value of the third region is smaller than or equal to the transmission power value of the first region. In this way, transmission power values of transmission and reception areas and different areas are defined, communication quality can be improved, and power consumption can be saved.

When the sidestream data is not transmitted, the transmitter of the sidestream may not be turned on. And when the sidestream data is not received, the receiver of the sidestream link may not be turned on to save power consumption of the first device.

In the method described in fig. 2, the first device acquires the first configuration information first, and after determining that the first device is located in the first area according to the first area information acquired by the first configuration information, the side line data can be sent based on the side line transmission parameters acquired by the first configuration information, so that the side line data can be sent in the configured area based on the configured side line transmission parameters, unnecessary transmission and potential interference to eMBB service can be reduced, and communication quality is improved.

Referring to fig. 4, fig. 4 is a schematic diagram illustrating another data transmission method according to an embodiment of the present application, where the method is also applied to a first device, and it should be noted that the first device includes a terminal device as shown in fig. 2, and may also include a roadside device. The method includes, but is not limited to, the steps of:

s402: the first device obtains second configuration information from the second device, the second configuration information indicating second area information and a side-uplink communication frequency.

S404: the first device determines that the first device is located in the second area according to the second area information.

The descriptions of step S402 and step S404 refer to step S202 and step S204, and are not described herein.

In one possible example, the second device comprises a network device, a terminal device, a roadside device, or an application server. Thus, the flexibility of acquiring the second configuration information is improved.

In one possible example, the second region information includes geographic location information, a number, or an identification of the second region. The second area information may refer to the description of the first area information, which is not described herein. It can be appreciated that determining the second area according to different indication information may improve accuracy of determining the second area and flexibility of configuration information.

In this example, step S404 includes: the first equipment receives a second message sent by the road side equipment; the first device obtains the signal quality of the second message; if the signal quality of the second message is greater than or equal to the second signal quality threshold, the first device determines that it is located in the second region.

The second message and the signal quality of the second message may refer to the first message and the description of the signal quality of the first message, which are not described herein. In this manner, determining the second region based on the signal quality may ensure communication quality for side-link communications in the second region and reduce unnecessary transmissions and potential interference to eMBB traffic by the first device.

In this example, the first device receives a second message sent by the roadside device; the first device obtains the signal quality of the second message; the first equipment determines the distance between the first equipment and the road side equipment according to the geographic position of the road side equipment and the geographic position of the first equipment; if the signal quality of the second message is greater than or equal to the second signal quality threshold and/or the distance is less than or equal to the second distance threshold, the first device determines that the second message is located in the second area. In this way, determining the second region based on the distance to the roadside device in the second region and the signal quality between the first device and the roadside device ensures the communication quality of the side-link communication in the second region and reduces unnecessary transmissions and potential interference to eMBB traffic by the first device.

In a possible example, the second configuration information is further used for indicating first area information, the first area information is used for determining a first area, the second area comprises the first area, the second area is larger than the first area, and the first device determines that the first device is located in the first area according to the first area information; the first device transmits sidelink data based on the sidelink transmission parameters. Therefore, the first equipment can send the side data in the first area based on the second configuration information, interference with other links can be avoided, and communication quality and communication diversity can be improved.

S406: the first device receives sidelink data on a sidelink communication frequency.

In the embodiment of the application, the first device can receive the sidestream data sent by the devices in the receivable range on the sidestream communication frequency. The device may be a terminal device located in the second area, for example, the first device described in the method of fig. 2, or may be a roadside device located in the second area, which is not limited herein.

In one possible example, the first region information is further used to determine a first sub-region and a second sub-region, the first region including the first sub-region and the second sub-region, step S406 includes: responsive to the first device determining to be located in the first sub-region, the first device transmitting sidelink data on the sidelink communication frequency based on the first transmit power value and/or the sidelink communication frequency corresponding to the first sub-region; and/or, in response to the first device determining to be located in the second sub-region, the first device transmitting sidelink data on the sidelink communication frequency based on the second transmit power value and/or the sidelink communication frequency corresponding to the second sub-region. Thus, different transmitting power values are adopted in different areas, so that the communication quality can be improved, and the power consumption can be saved.

In the method described in fig. 4, the first device acquires the second configuration information first, and after determining that the first device is located in the second area according to the second area information acquired by the second configuration information, the side line data can be received at the side line communication frequency acquired by the first configuration information, so that the side line data can be received in the configured area based on the configured side line communication frequency, unnecessary transmission and potential interference to eMBB services can be reduced, and communication quality is improved.

Referring to fig. 5, fig. 5 is a schematic diagram of another data transmission method according to an embodiment of the present application, where the method is applied to a second device, and the method includes, but is not limited to, the following steps:

S502: the second device transmits first configuration information and/or second configuration information, wherein the first configuration information is used for indicating the side-link transmission parameters, and the first area information, and the second configuration information is used for indicating the second area information and the side-link communication frequency.

Step S502 may refer to the descriptions of step S202 and step S402, and will not be described herein.

It should be noted that, when the second device is a network device or an application server, the first configuration information may be directly sent to the first device, and/or the second configuration information may be sent to the first device, or the first configuration information and/or the second configuration information may be sent to the terminal device or the roadside device. In this way, the configuration information of the network device or the application server is forwarded by the terminal device or the road side device, so that the signaling overhead of the network can be reduced.

In this example, step S502 includes: the method comprises the steps that road side equipment and/or terminal equipment receive first configuration information and/or second configuration information sent by network equipment or an application server; the road side equipment and/or the terminal equipment determines that the distance between the road side equipment and the first equipment is smaller than or equal to a preset threshold value, and sends first configuration information and/or second configuration information to the first equipment. That is, the device may obtain configuration information for the current geographic location, which may improve communication quality, reduce signaling overhead of the network, and save power consumption.

In one possible example, the first region information is used to indicate at least one of: the method comprises the steps of a first area, road side equipment in the first area, a first signal quality threshold or a first distance threshold; the second area information is used to indicate at least one of: a second region, a roadside device within the second region, a second signal quality threshold, or a second distance threshold. Thus, the first device can determine that the first device is located in the first area according to the first area information and determine that the first device is located in the second area according to the second area information, so that communication quality is improved.

In this example, the side-uplink transmit power parameters include at least one of: a path loss factor, a maximum transmit power, an open loop transmit power, a power adjustment factor, at least one transmit power value. In this way, the second device can dynamically set the side-link transmission power value, which improves flexibility and facilitates improving communication quality.

In the method described in fig. 5, the second device sends the first configuration information and/or the second configuration information, so that the terminal device or the road side device can perform the side-link communication in the configured area based on the configured side-link transmission parameters, which can reduce unnecessary transmission and potential interference to eMBB services, and improve the communication quality.

The foregoing details of the method according to the embodiments of the present application and the apparatus according to the embodiments of the present application are provided below.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a communication device according to an embodiment of the present application, where the communication device includes a first apparatus, and the first apparatus includes a transceiver unit 601 and a processing unit 602, where the details of the respective units are as follows.

In one embodiment:

A transceiver unit 601, configured to obtain first configuration information, where the first configuration information is used to indicate a side uplink transmission parameter, and first area information;

A processing unit 602, configured to determine that the first region is located according to the first region information;

The transceiver unit 601 is further configured to send sidelink data based on the sidelink transmission parameter.

Optionally, the first area information is used to indicate at least one of the following:

a first region, a roadside device within the first region, a first signal quality threshold, or a first distance threshold.

Optionally, the side-link transmission parameters include side-link transmission power parameters and/or side-link communication frequencies.

Optionally, the side-uplink transmit power parameter includes at least one of: a path loss factor, a maximum transmit power, an open loop transmit power, a power adjustment factor, at least one transmit power value.

Optionally, the first region includes a first sub-region and a second sub-region, the sidelink transmission power parameter includes a first transmission power value corresponding to the first sub-region and a second transmission power value corresponding to the second sub-region, and the transceiver unit 601 is specifically configured to transmit sidelink data in the first sub-region based on the first transmission power value and/or the sidelink communication frequency; and/or transmitting sidelink data based on the second transmit power value and/or the sidelink communication frequency at the second sub-region.

Optionally, the first configuration information is further used to indicate second area information, the second area information is used to determine a second area, the second area includes a first area and the second area is larger than the first area, and the transceiver unit 601 is further used to receive sidestream data on the sidestream communication frequency in response to the first device determining that the second area is located.

Optionally, the transceiver 601 is further configured to receive a first message sent by the roadside device; the processing unit 602 is specifically configured to obtain a signal quality of the first message; if the signal quality of the first message is greater than or equal to the first signal quality threshold, determining that the first message is located in the first area.

Optionally, the processing unit 602 is further configured to determine a distance from the roadside device according to the geographic location of the roadside device and the geographic location of the communication apparatus; if the distance is less than or equal to the first distance threshold, the first device determines that the first device is located in the first area.

Optionally, the first region information includes geographical location information, a number or an identification of the first region.

Optionally, the side-link communication frequency is different from the cellular-link communication frequency of the first region.

Optionally, the first configuration information is obtained from a network device; or obtained from a terminal device; or from a roadside device; or obtained from an application server.

In one embodiment:

a transceiver 601, configured to obtain second configuration information, where the second configuration information is used to indicate second area information and a side uplink communication frequency;

a processing unit 602, configured to determine that the second region is located according to the second region information;

the transceiver unit 601 is further configured to receive sidelink data on a sidelink communication frequency.

Optionally, the first device includes a terminal device or a road side device.

Optionally, the second configuration information is further used to indicate side-link transmission parameters, including side-link transmission power parameters and/or side-link communication frequency.

Optionally, the second region information includes geographical location information, a number or an identification of the second region.

Optionally, the second area information is used to indicate at least one of the following: a second region, a roadside device within the second region, a second signal quality threshold, or a second distance threshold.

Optionally, the transceiver 601 is further configured to receive a second message sent by the roadside device; the processing unit 602 is specifically configured to obtain a signal quality of the second message; and if the signal quality of the second message is greater than or equal to the second signal quality threshold, determining that the second message is located in the second area.

Optionally, the processing unit 602 is further configured to determine a distance from the roadside device according to the geographic location of the roadside device and the geographic location of the communication apparatus; and if the distance is smaller than or equal to the second distance threshold, determining that the second region is located.

Optionally, the second area information is further used for indicating first area information, the first area information is used for determining a first area, the second area includes the first area, the second area is larger than the first area, and the transceiver unit 601 is further used for determining that the first area is located according to the first area information; the sidelink data is transmitted based on the sidelink transmission parameters.

Optionally, the first area information is further used to determine a first sub-area and a second sub-area, the first area includes the first sub-area and the second sub-area, and the transceiver unit 601 is further used to determine that the first sub-area is located according to the first area information, and send sideline data based on a first transmission power value and/or a sideline communication frequency corresponding to the first sub-area; and/or determining that the second sub-area is located according to the first area information, and transmitting side line data based on a second transmission power value and/or side line communication frequency corresponding to the second sub-area.

Optionally, the second configuration information is obtained from the network device; or obtained from a terminal device; or from a roadside device; or obtained from an application server.

The communication apparatus as shown in fig. 6 further comprises a second device, which may also comprise a transceiver unit 601 and a processing unit 602, wherein the respective units are described in detail below.

In one embodiment:

The transceiver 601 is configured to send first configuration information and/or second configuration information, where the first configuration information is used to indicate a side-link transmission parameter, and the first area information, and the second configuration information is used to indicate the second area information and a side-link communication frequency.

Optionally, the side-link communication frequency is different from the cellular-link communication frequency of the second area determined by the second area information.

Optionally, the second device comprises at least one of: network equipment, terminal equipment, road side equipment and an application server.

Optionally, the transceiver 601 of the roadside device and/or the terminal device is specifically configured to receive the first configuration information and/or the second configuration information sent by the network device and/or the application server; and determining that the distance between the first configuration information and the other communication device is smaller than or equal to a preset threshold value, and sending the first configuration information and/or the second configuration information to the other communication device.

Optionally, the first area information is used to indicate at least one of the following: the method comprises the steps of a first area, road side equipment in the first area, a first signal quality threshold or a first distance threshold; the second area information is used to indicate at least one of: a second region, a roadside device within the second region, a second signal quality threshold, or a second distance threshold.

Optionally, the first region information is further used for indicating a first sub-region and a second sub-region, the first region includes the first sub-region and the second sub-region, and the at least one transmission power value includes a first transmission power value corresponding to the first sub-region and a second transmission power value corresponding to the second sub-region.

Optionally, the first configuration information is further used to indicate second area information, the second area information is used to determine a second area, the second area includes a first area, and the second area is larger than the first area.

Optionally, the first region information includes geographical location information, a number or an identification of the first region, and the second region information includes geographical location information, a number or an identification of the second region.

It should be noted that the implementation of each unit may also correspond to the corresponding description of the method embodiments shown in fig. 2, 4 and 5.

In the communication apparatus described in fig. 6, the first device or the first device may acquire configuration information of the second device, and perform, in an area corresponding to the configuration information, side-uplink communication based on side-uplink transmission parameters of the configuration information, so that unnecessary transmission and potential interference to eMBB services may be reduced, and communication quality may be improved.

Referring to fig. 7, fig. 7 is another communication device according to an embodiment of the present application, where the communication device includes a processor 701, a memory 702, and a communication interface 703, and the processor 701, the memory 702, and the communication interface 703 are connected to each other through a bus 704.

Memory 702 includes, but is not limited to, random access memory (random access memory, RAM), read-only memory (ROM), erasable programmable read-only memory (erasable programmable read only memory, EPROM), or portable read-only memory (compact disc read-only memory, CD-ROM), and memory 702 is used for associated computer programs and side-line data. The communication interface 703 is used to receive and transmit side line data.

The processor 701 may be one or more central processing units (central processing unit, CPU), and in the case where the processor 701 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.

The communication apparatus comprises a first device, a processor 701 in the communication apparatus for reading computer program code stored in a memory 702, performing the following operations:

Acquiring first configuration information, wherein the first configuration information is used for indicating a side uplink transmission parameter and first area information;

determining that the first region is located according to the first region information;

the sidelink data is transmitted based on the sidelink transmission parameters.

In one possible example, the first region information is used to indicate at least one of: a first region, a roadside device within the first region, a first signal quality threshold, or a first distance threshold.

In one possible example, the side-link transmission parameters include side-link transmit power parameters and/or side-link communication frequencies.

In one possible example, the side-uplink transmit power parameter includes at least one of: a path loss factor, a maximum transmit power, an open loop transmit power, a power adjustment factor, at least one transmit power value.

In a possible example, the first region includes a first sub-region and a second sub-region, the at least one transmit power value includes a first transmit power value corresponding to the first sub-region and a second transmit power value corresponding to the second sub-region, and the processor 701 is specifically configured to perform the following operations:

Transmitting sidelink data at the first sub-region based on the first transmit power value and/or the sidelink communication frequency; or transmitting sidelink data in the second sub-region based on the second transmit power value and/or the sidelink communication frequency.

In a possible example, the first configuration information is further used to indicate second area information, the second area information is used to determine a second area, the second area includes a first area, and the second area is larger than the first area, and the processor 701 is specifically configured to perform the following operations:

the sidelink data is received on the sidelink communication frequency in response to the first device determining to be located in the second region.

In one possible example, the processor 701 is specifically configured to perform the following operations:

Receiving a first message sent by a road side device;

Acquiring the signal quality of a first message;

If the signal quality is greater than or equal to the first signal quality threshold, the first device determines that the first device is located in the first region.

In one possible example, the processor 701 is further configured to perform the following operations:

Determining a distance between the road side equipment and the road side equipment according to the geographic position of the road side equipment and the geographic position of the first equipment;

If the distance is less than or equal to the first distance threshold, the first region is determined to be located.

In one possible example, the first region information includes geographic location information, a number, or an identification of the first region.

In one possible example, the side-link communication frequency is different from the cellular-link communication frequency of the first region.

The processor 701 in the first device is arranged to read the computer program code stored in the memory 702, performing the following operations:

Acquiring second configuration information, wherein the second configuration information is used for indicating second area information and side uplink communication frequency;

determining that the first geographic position information is located in the first area according to the first geographic position information;

the sidelink data is received on a sidelink communication frequency.

In one possible example, the second region information includes geographic location information, a number, or an identification of the second region.

In one possible example, the second region information is used to indicate at least one of: a second region, a roadside device within the second region, a second signal quality threshold, or a second distance threshold.

In this example, the processor 701 is specifically configured to perform the following operations:

Receiving a second message sent by the road side equipment;

Acquiring the signal quality of the second message;

if the signal quality of the second message is greater than or equal to the second signal quality threshold, the first device is determined to be located in the second area.

In this example, the processor 701 is further configured to perform the following operations:

determining a distance between the first device and the road side device according to the geographic position of the road side device and the geographic position of the first device;

and if the distance is smaller than or equal to the second distance threshold, determining that the first device is located in the second area.

In one possible example, the second configuration information is further used to indicate side-link transmission parameters including side-link transmit power parameters and/or side-link communication frequencies.

In this example, the side-uplink transmit power parameters include at least one of: a path loss factor, a maximum transmit power, an open loop transmit power, a power adjustment factor, at least one transmit power value.

In one possible example, the second region information is further used to indicate first region information, the first region information is used to determine a first region, the second region includes the first region, and the second region is larger than the first region, and the processor 701 is further configured to perform the following operations:

And transmitting the sidestream data based on the sidestream transmission parameters.

In one possible example, the first region information is further used to determine a first sub-region and a second sub-region, the first region comprising the first sub-region and the second sub-region, and the processor 701 is further configured to:

receiving, by the first device, sidelink data transmitted by the first device based on the first transmit power value and/or the sidelink communication frequency corresponding to the first sub-region on the sidelink communication frequency in response to the first device determining to be located in the first sub-region; and/or the number of the groups of groups,

In response to the first device determining to be located in the second sub-region, on the sidelink communication frequency, sidelink data transmitted by the first device based on the second transmit power value and/or the sidelink communication frequency corresponding to the second sub-region is received.

In one possible example, the side-link communication frequency is different from the cellular-link communication frequency of the second region.

In one possible example, the second configuration information is obtained from a base station; or obtained from a terminal device; or from a roadside device; or obtained from an application server.

The communication apparatus comprises a second device in which a processor 701 is arranged to read computer program code stored in a memory 702, performing the following operations:

and sending first configuration information and/or second configuration information, wherein the first configuration information is used for indicating the side-link transmission parameters and the first area information, and the second configuration information is used for indicating the second area information and the side-link communication frequency.

In one possible example, the second device comprises a network device, a terminal device, a roadside device, or an application server.

In this example, the processor 701 of the roadside device and/or the terminal device is specifically configured to perform the following operations:

Receiving first configuration information and/or second configuration information sent by network equipment or an application server;

and determining that the distance between the first configuration information and the other communication device is smaller than or equal to a preset threshold value, and sending the first configuration information and/or the second configuration information to the other communication device.

In one possible example, the first region information is used to indicate at least one of: the method comprises the steps of a first area, road side equipment in the first area, a first signal quality threshold or a first distance threshold; the second area information is used to indicate at least one of: a second region, a roadside device within the second region, a second signal quality threshold, or a second distance threshold.

In one possible example, the first region information is further used to indicate a first sub-region and a second sub-region, the first region including the first sub-region and the second sub-region, the at least one transmit power value including a first transmit power value corresponding to the first sub-region and a second transmit power value corresponding to the second sub-region.

In one possible example, the first configuration information is further used to indicate second region information, the second region information being used to determine a second region, the second region including the first region and the second region being larger than the first region.

In one possible example, the first region information includes geographic location information, number, or identification of the first region, and the second region information includes geographic location information, number, or identification of the second region.

In one possible example, the side-link communication frequency is different from the cellular-link communication frequency of the second area determined by the second area information.

It should be noted that the implementation of the respective operations may also correspond to the respective descriptions of the method embodiments shown with reference to fig. 2, 4 and 5.

In the communication apparatus described in fig. 7, the first device or the first device may acquire configuration information of the second device, and perform, in an area corresponding to the configuration information, side-uplink communication based on side-uplink transmission parameters of the configuration information, so that unnecessary transmission and potential interference to eMBB services may be reduced, and communication quality may be improved.

The embodiment of the application also provides a communication device, which is used for executing any method and function related to the first equipment or the second equipment in any of the above embodiments.

The embodiment of the application also provides a communication system, which comprises at least one first device and at least one second device, wherein the at least one first device and the at least one second device are related in any embodiment.

The embodiment of the application also provides a chip system, which comprises at least one processor, a memory and an interface circuit, wherein the memory, the transceiver and the at least one processor are interconnected through a circuit, and a computer program is stored in the at least one memory; the method flows shown in fig. 2, 4 and 5 are implemented when the computer program is executed by a processor.

Embodiments of the present application also provide a computer readable storage medium having a computer program stored therein, which when run on a communication device, implements the method flows shown in fig. 2, 4 and 5.

The embodiments of the present application also provide a computer program product, which when run on a communication device, implements the method flows shown in fig. 2, 4 and 5.

In summary, by implementing the embodiment of the present application, the first device may obtain the configuration information of the second device, and perform the side uplink communication based on the side uplink transmission parameter of the configuration information in the area corresponding to the configuration information, so as to reduce unnecessary transmission and potential interference to eMBB services, and improve the communication quality.

Those of ordinary skill in the art will appreciate that implementing all or part of the above-described embodiment methods may be accomplished by a computer program in hardware associated with the computer program, which may be stored on a computer readable storage medium, which when executed may comprise the above-described embodiment methods. And the aforementioned storage medium includes: various media capable of storing computer program code, such as ROM or random access memory RAM, magnetic or optical disk.

Claims

1. A data transmission method, comprising:

The method comprises the steps that first equipment obtains first configuration information, wherein the first configuration information is used for indicating side uplink transmission parameters and first area information;

The first device determines that the first device is located in a first area according to the first area information;

the first device transmits sidelink data based on the sidelink transmission parameters, wherein the sidelink transmission parameters comprise a sidelink transmission power parameter and a sidelink communication frequency, the sidelink transmission power parameter comprises a transmission power value, the transmission power value of the first device at the edge of the first region is smaller than the transmission power value of the first device at the center of the first region, and the sidelink communication frequency is different from the cellular link communication frequency.

2. The method of claim 1, wherein the first region information is used to indicate at least one of:

The first region, a roadside device within the first region, a first signal quality threshold, or a first distance threshold.

3. The method of claim 2, wherein the first region comprises a first sub-region and a second sub-region, the sidelink transmit power parameter comprises a first transmit power value corresponding to the first sub-region and a second transmit power value corresponding to the second sub-region, the first device transmitting sidelink data based on the sidelink transmit parameter, comprising:

the first device transmits sidelink data based on the first transmission power value and/or the sidelink communication frequency in the first sub-region; and/or the number of the groups of groups,

The first device transmits sidelink data based on the second transmit power value and/or the sidelink communication frequency at the second sub-region.

4. A method according to claim 3, wherein the first region information is further used to indicate the first and second sub-regions, the method further comprising:

the first device determines whether the first device is located in the first subarea or the second subarea according to the first area information.

5. The method of any of claims 1 to 4, wherein the first configuration information is further used to indicate second region information, the second region information being used to determine a second region, the second region including the first region and the second region being larger than the first region, the method further comprising:

In response to the first device determining to be located in the second region, the first device receives sidelink data on the sidelink communication frequency.

6. The method of claim 2, wherein the first device determining that the first device is located in the first region based on the first region information comprises:

The first equipment receives a first message sent by the road side equipment;

the first device obtains the signal quality of the first message;

and if the signal quality of the first message is greater than or equal to the first signal quality threshold, the first device determines that the first message is located in a first area.

7. The method according to claim 2, wherein the method further comprises:

The first equipment determines the distance between the first equipment and the road side equipment according to the geographic position of the road side equipment and the geographic position of the first equipment;

and if the distance is smaller than or equal to the first distance threshold, the first device determines that the first device is located in a first area.

8. The method of claim 1, wherein the side-link communication frequency is different from a cellular-link communication frequency of the first region.

9. The method of claim 1, wherein the first configuration information is

Acquired from a network device; or alternatively

Acquiring from a terminal device; or alternatively

Acquired from road side equipment; or alternatively

Obtained from an application server.

10. A data transmission method, comprising:

The method comprises the steps that a first device obtains second configuration information, wherein the second configuration information is used for indicating second area information, a side-link transmission parameter and first area information, the first area information is used for determining a first area, the side-link transmission parameter comprises a side-link transmission power parameter and a side-link communication frequency, the side-link transmission power parameter comprises a transmission power value, the transmission power value of the first device at the edge of the first area is smaller than the transmission power value of the first device at the center of the first area, and the side-link communication frequency is different from a cellular link communication frequency;

the first device determines that the first device is positioned in a second area according to the second area information;

the first device receives sidelink data on the sidelink communication frequency.

11. The method of claim 10, wherein the second region comprises the first region and the second region is larger than the first region, the method further comprising:

the first device determines that the first device is located in the first area according to the first area information;

The first device transmits sidelink data based on the sidelink transmission parameters.

12. The method of claim 10, wherein the side-link communication frequency is different from a cellular-link communication frequency of the second region.

13. A data transmission method, comprising:

The second device sends first configuration information and second configuration information, wherein the first configuration information is used for indicating a side-link transmission parameter and first area information, the second configuration information is used for indicating second area information and a side-link communication frequency, the side-link transmission parameter comprises a side-link transmission power parameter and the side-link communication frequency, the side-link transmission power parameter comprises a transmission power value, the transmission power value of the first device at the edge of the first area is smaller than the transmission power value of the first device at the center of the first area, and the side-link communication frequency is different from the cellular link communication frequency.

14. The method of claim 13, wherein the side-link communication frequency is different from a cellular-link communication frequency of a second area determined by the second area information.

15. The method of claim 13 or 14, wherein the second device comprises at least one of: network equipment, terminal equipment, road side equipment and an application server.

16. The method of claim 15, wherein the second device transmitting the first configuration information and the second configuration information comprises:

The road side equipment and/or the terminal equipment receives the first configuration information and the second configuration information sent by the network equipment and/or the application server;

the road side equipment and/or the terminal equipment determine that the distance between the road side equipment and the first equipment is smaller than or equal to a preset threshold value, and send first configuration information and second configuration information to the first equipment.

17. A communication apparatus for use in a first device, comprising:

a transceiver unit, configured to obtain first configuration information, where the first configuration information is used to indicate a side uplink transmission parameter and first area information;

The processing unit is used for determining that the first equipment is located in a first area according to the first area information;

The transceiver unit is further configured to send side uplink data based on the side uplink transmission parameter, where the side uplink transmission parameter includes a side uplink transmission power parameter and a side uplink communication frequency, and the side uplink transmission power parameter includes a transmission power value, where the transmission power value of the first device at the edge of the first area is smaller than the transmission power value of the first device at the center of the first area, and the side uplink communication frequency is different from the cellular link communication frequency.

18. The apparatus of claim 17, wherein the first region information is used to indicate at least one of:

19. The apparatus according to claim 18, wherein the first region comprises a first sub-region and a second sub-region, the sidelink transmit power parameter comprises a first transmit power value corresponding to the first sub-region and a second transmit power value corresponding to the second sub-region, the transceiving unit being specifically configured to transmit sidelink data at the first sub-region based on the first transmit power value and/or the sidelink communication frequency; and/or transmitting sidelink data at the second sub-region based on the second transmit power value and/or the sidelink communication frequency.

20. The apparatus of claim 19, wherein the first region information is further for indicating the first sub-region and the second sub-region, and wherein the transceiver unit is further for determining whether to locate at the first sub-region or the second sub-region based on the first region information.

21. The apparatus of any of claims 17 to 20, wherein the first configuration information is further configured to indicate second region information, the second region information being configured to determine a second region, the second region including the first region and the second region being larger than the first region, the transceiver unit being further configured to receive side row data on the side-link communication frequency in response to determining to be located in the second region.

22. The apparatus of claim 18, wherein the transceiver unit is further configured to receive a first message sent by the roadside device; the processing unit is specifically configured to obtain signal quality of the first message; and if the signal quality of the first message is greater than or equal to the first signal quality threshold, determining that the first message is located in a first area.

23. The apparatus of claim 18, wherein the processing unit is further configured to determine a distance to the roadside device based on a geographic location of the roadside device and a geographic location of the communication apparatus; and if the distance is smaller than or equal to the first distance threshold, determining that the first region is located.

24. The apparatus of claim 17, wherein the side-link communication frequency is different from a cellular-link communication frequency of the first region.

25. The apparatus of claim 17, wherein the first configuration information is obtained from a network device; or obtained from a terminal device; or from a roadside device; or obtained from an application server.

26. A communication apparatus for use in a first device, comprising:

A transceiver unit, configured to obtain second configuration information, where the second configuration information is used to indicate second area information and side link transmission parameters and first area information, where the first area information is used to determine a first area, the side link transmission parameters include side link transmission power parameters and side link communication frequencies, the side link transmission power parameters include transmission power values, where the transmission power values of the first device at the edge of the first area are smaller than the transmission power values of the first device at the center of the first area, and the side link communication frequencies are different from cellular link communication frequencies;

the processing unit is used for determining that the second region is located according to the second region information;

the transceiver unit is further configured to receive sidelink data on the sidelink communication frequency.

27. The apparatus of claim 26, wherein the second region comprises the first region and the second region is larger than the first region, the transceiver unit further configured to determine that the second region is located in the first region based on the first region information, and to transmit sideline data based on the sideline transmission parameters.

28. The apparatus of claim 26, wherein the side-link communication frequency is different from a cellular-link communication frequency of the second region.

29. A communication device, comprising:

The device comprises a receiving and transmitting unit, a transmitting unit and a receiving unit, wherein the receiving unit is used for transmitting first configuration information and second configuration information, the first configuration information is used for indicating a side link transmission parameter, the second configuration information is used for indicating second area information and a side link communication frequency, the side link transmission parameter comprises a side link transmission power parameter and the side link communication frequency, the side link transmission power parameter comprises a transmission power value, wherein the transmission power value of a first device at the edge of a first area is smaller than the transmission power value of the first device at the center of the first area, and the side link communication frequency is different from a cellular link communication frequency.

30. The apparatus of claim 29, wherein the side-link communication frequency is different from a cellular-link communication frequency of a second region determined by the second region information.

31. The apparatus according to claim 29 or 30, wherein the communication means comprises at least one of: network equipment, terminal equipment, road side equipment and an application server.

32. The apparatus according to claim 31, wherein the transceiver unit of the roadside device and/or the terminal device is specifically configured to receive the first configuration information and the second configuration information sent by the network device and/or the application server; and determining that the distance between the first configuration information and the other communication devices is smaller than or equal to a preset threshold value, and sending the first configuration information and the second configuration information to the other communication devices.

33. A communication device comprising a processor and a memory and a communication interface connected to the processor, wherein the memory is configured to store one or more programs and is configured to be executed by the processor, the programs comprising instructions for performing the steps of the method of any of claims 1-9, or the programs comprising instructions for performing the steps of the method of any of claims 10-12, or the programs comprising instructions for performing the steps of the method of any of claims 13-16.

34. A computer readable storage medium, for storing a computer program, wherein the computer program causes a computer to perform the method according to any one of claims 1-9, or the computer program causes a computer to perform the method according to any one of claims 10-12, or the computer program causes a computer to perform the method according to any one of claims 13-16.

35. A computer program product for storing a computer program which, when run on a computer, causes the computer to perform the method of any one of claims 1 to 9 or causes the computer to perform the method of any one of claims 10 to 12 or causes the computer to perform the method of any one of claims 13 to 16.

36. A communication system comprising a communication device according to any one of claims 17 to 25 and a communication device according to any one of claims 26 to 28, and a communication device according to any one of claims 29 to 32.