CN110972295B

CN110972295B - Communication method and device

Info

Publication number: CN110972295B
Application number: CN201811155726.7A
Authority: CN
Inventors: 黎超
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-09-29
Filing date: 2018-09-29
Publication date: 2022-10-28
Anticipated expiration: 2038-09-29
Also published as: WO2020063387A1; CN110972295A

Abstract

The embodiment of the application discloses a communication method and equipment, relates to the field of communication, and can indicate the frequency domain resources of a direct link based on a frequency domain reference point to realize the communication of the direct link between the equipment. The method comprises the following steps: the method comprises the steps that a first device determines a frequency domain reference point of frequency domain resources of a direct connection link, wherein the frequency domain reference point is a first resource unit of the frequency domain resources of the direct connection link; the first device determines frequency domain resources of a first link; the first link is a direct link of a first device, and the first device sends data on frequency domain resources of the first link or receives data on the frequency domain resources of the first link.

Description

Communication method and device

Technical Field

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

Background

With the development of communication technology, intelligent transportation technology represented by the internet of vehicles has been rapidly developed. With this, vehicle to any object (V2X) communication technology has emerged. V2X may be vehicle to vehicle (V2V), vehicle to human (V2P), or vehicle to infrastructure (V2I). The V2X link is one of direct links, and direct communication between terminal devices may be performed through the V2X link.

Currently, long Term Evolution (LTE) based on 3rd generation partnership project (3 gpp) has started research on the fifth generation communication technology (5G) system, and in the 5G system, it is necessary to configure appropriate time-frequency resources for V2X for terminal devices located in different cells to ensure that the terminal devices between multiple different cells can effectively implement direct communication. However, under the 5G technical framework, direct communication between a plurality of different terminal devices located in different cells cannot be achieved, which greatly affects the development of intelligent transportation.

Disclosure of Invention

The embodiment of the application provides a communication method and equipment, which can indicate the frequency domain resources of a direct connection link based on a frequency domain reference point, and realize direct connection communication between terminal equipment.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect, a communication method is disclosed, which includes: the first device first determines a frequency domain reference point of a frequency domain resource of a direct connection link. And the frequency domain reference point of the direct connection link is a first resource unit of the frequency domain resource of the direct connection link. Subsequently, the first device may further determine a frequency domain resource of a first link, where the first link is a direct link of the first device; further, the first device transmits data on the frequency domain resources of the first link, or the first device receives data on the frequency domain resources of the first link.

In the method provided by the embodiment of the invention, the transceiver on the direct link can determine the frequency domain reference point of the direct link, and further the transceiver on the direct link can determine the frequency domain resource of the direct link. In the prior art, each terminal device configures transmission resources of a direct link according to a frequency domain reference point of a cell in which the terminal device resides, which may cause misalignment of the transmission resources configured on the direct link by each terminal device, and further cause that the terminal devices cannot communicate with each other through the direct link. In contrast, in the embodiment of the present invention, frequency domain reference points of the direct link may be uniformly configured in different cells, and the sending end device and the receiving end device of the direct link may determine the frequency domain reference points of the direct link, so that transmission resources configured for the direct link by the sending end device and the receiving end device are aligned, and the sending end device and the receiving end device may also perform direct communication through the direct link, thereby improving the efficiency of the direct link communication.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the determining, by the first device, the frequency domain reference point of the direct connection link includes: the first device receives a first offset parameter sent by a network device, where the first offset parameter is the number of resource units offset between a frequency domain reference point and a frequency domain reference point of a cellular link, or the first offset parameter is used to indicate an offset between the frequency domain reference point and the frequency domain reference point of the cellular link, and the offset is at least one of: m Resource Elements (REs), N Resource Blocks (RBs), wherein M, N is a non-negative integer. Further, the first device may determine a frequency domain reference point based on the frequency domain reference point of the cellular link and the received first offset parameter. It should be noted that the resource element may be an RE, an RB, or a subcarrier spacing.

In the embodiment of the present invention, the network device may configure a frequency domain reference point for the direct link with reference to the frequency domain reference point of the cellular link, and specifically, may configure a frequency domain position, which is frequency-shifted from the frequency domain reference point of the cellular link by several resource units, as the frequency domain reference point of the direct link. Further, the network device may indicate an offset (i.e., the first offset parameter according to the embodiment of the present invention) between the frequency domain reference point and the frequency domain reference point of the cellular link to the transceiver device on the direct link, and the transceiver device on the direct link may determine the frequency domain reference point of the direct link according to the first offset parameter sent by the network device. As can be seen, in the method provided by the embodiment of the present invention, the transceiver device of the direct connection link may determine the frequency domain reference point of the direct connection link according to the first offset parameter sent by the network device, and further determine the frequency domain resource of the first link of the direct connection communication performed by the transceiver device.

With reference to the first aspect, in a second possible implementation manner of the first aspect, the determining, by the first device, the frequency domain reference point includes: the first equipment receives the absolute radio channel number ARFCN sent by the network equipment, and determines the frequency domain position indicated by the ARFCN as a frequency domain reference point.

In the embodiment of the present invention, the ARFCN is a number indicating a fixed frequency domain location, and may be a fixed radio channel. The network device may also configure one of the frequency domain locations indicated by the ARFCN as a direct link frequency domain reference point. Further, the network device may indicate the number ARFCN to the transceiver device on the direct link, and the transceiver device on the direct link may determine a frequency domain position according to the ARFCN sent by the network device, and then use the frequency domain position as a frequency domain reference point of the direct link. As can be seen, in the method provided by the embodiment of the present invention, the transceiver device of the direct connection link may determine the frequency domain reference point of the direct connection link according to the ARFCN sent by the network device, and further determine the frequency domain resource of the first link in which the transceiver device performs direct connection communication.

With reference to the first aspect or the first or second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the method further includes: the first device receives a second offset parameter sent by the network device, where the second offset parameter is used to indicate the number of resource units between a frequency domain reference point of a direct connection link and a frequency domain position of frequency domain resources of the first link, or the second offset parameter is used to indicate an offset between the frequency domain reference point and the frequency domain position of the frequency domain resources of the first link, where the frequency domain position is a first resource unit of a carrier where the first link is located, or a first resource unit of a resource pool of the direct connection link. It should be noted that, the resource pool of the direct link described herein may be a resource pool of direct links of all terminal devices, such as: the resource pool of the direct link described herein may be a direct link of the first device — a resource pool of the first link.

In the embodiment of the present invention, the network device may further configure, with reference to the frequency domain reference point of the direct connection link, a carrier where the first link is located or a resource pool of the direct connection link. Specifically, a frequency domain position offset from a frequency domain reference point of the direct connection link by several resource units may be determined, where the frequency domain position may be a starting position of a carrier where the first link is located, or may be a starting position of a resource pool of the direct connection link. Further, the network device may indicate the number of resource units (the second offset parameter according to the basic embodiment of the present invention) of the frequency domain position offset from the frequency domain reference point of the direct connection link to the transceiver device on the direct connection link, and the transceiver device on the direct connection link may determine a frequency domain position according to the second offset parameter sent by the network device, and then use the frequency domain position as a first resource unit of a resource pool of the direct connection link or a first resource unit of a carrier where the first link is located. As can be seen, in the method provided by the embodiment of the present invention, the transceiver device of the direct connection link may determine the frequency domain resource of the first link performing the direct connection communication according to the second offset parameter sent by the network device.

With reference to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the offset indicated by the second offset parameter is Q common subcarrier intervals, or the offset indicated by the second offset parameter is at least one of: m REs, N RBs; wherein M, N, Q are all non-negative integers.

In the embodiment of the present invention, a frequency domain position (the starting position of the carrier where the first link is located or the starting position of the resource pool of the direct link) configured by the network device with reference to the frequency domain reference point of the direct link may be spaced by M REs or N RBs from the frequency domain reference point of the direct link, may be spaced by M REs plus N RBs from the frequency domain reference point of the direct link, and may be spaced by a plurality of subcarrier intervals from the frequency domain reference point of the direct link.

With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the offset between the frequency domain reference point and the frequency domain position indicated by the second offset parameter is (12 × m + n) REs.

With reference to the third, fourth, or fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the determining, by the first device, the frequency domain resource of the first link according to the frequency domain reference point includes: and the first equipment determines a first resource unit of a carrier where the first link is located according to the frequency domain reference point and the second offset parameter, or determines a first resource unit of a resource pool of the direct link according to the frequency domain reference point and the second offset parameter.

In the embodiment of the present invention, the transceiver device on the direct link may determine, according to the frequency domain reference point of the direct link indicated by the network device and the second offset parameter, the first resource unit of the carrier where the first link is located or the first resource unit of the resource pool of the direct link, and further may perform direct communication on the first link according to the frequency domain resource configured for transmission of the direct link according to the determined resource.

With reference to the fourth, fifth, or sixth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, when the frequency domain resource of the first link belongs to the first frequency range, the common subcarrier interval is a first subcarrier interval; when the frequency domain resource of the first link belongs to a second frequency range, the common subcarrier interval is a second subcarrier interval; wherein the first frequency domain range is a frequency domain range not greater than 6 GHz and the second frequency domain range is a frequency domain range greater than 6 GHz.

With reference to the seventh possible implementation manner of the first aspect, in an eighth possible implementation manner of the first aspect, the first subcarrier interval is 15kHz, and the second subcarrier interval is 60kHz.

With reference to the first aspect or any one of the first to eighth possible implementation manners of the first aspect, in a ninth possible implementation manner of the first aspect, the frequency domain reference point is a specific frequency domain reference point of the direct connection link.

In the embodiment of the present invention, the frequency domain reference point of the direct connection link is different from the frequency domain reference point of the cellular link and is a frequency domain reference point dedicated for the direct connection link, that is, the frequency domain reference point is only applicable to the direct connection link. Of course, the frequency domain reference point of the cellular link is also dedicated, only for the cellular link.

With reference to the first aspect or any one of the first to eighth possible implementation manners of the first aspect, in a tenth possible implementation manner of the first aspect, the frequency domain reference point is a frequency domain reference point common to the cells, or the frequency domain reference point is a frequency domain reference point of a cell where the first device resides.

In the embodiment of the invention, the frequency domain reference point of the direct connection link is a frequency domain reference point common to all cells, and the terminal equipment residing under any cell can determine the frequency domain resource of the direct connection link according to the common frequency domain reference point. Of course, different cells may have dedicated frequency domain reference points, which may be different for different cells. The terminal equipment needs to determine the frequency domain resource of the direct link according to the dedicated frequency domain reference point of the cell where the terminal equipment resides.

With reference to the first aspect or any one of the first to eighth possible implementation manners of the first aspect, in an eleventh possible implementation manner of the first aspect, the frequency domain reference point is a frequency domain reference point dedicated to a sending end of the direct connection link, or the frequency domain reference point is a frequency domain reference point dedicated to a receiving end of the direct connection link.

In the embodiment of the invention, a sending end and a receiving end on the direct connection link use different frequency domain reference points, the sending end uses a special frequency domain reference point for the sending end of the direct connection link, and the frequency domain reference point is only suitable for a terminal device to determine the transmission resource of the direct connection link when sending data. The receiving end uses a frequency domain reference point dedicated for the receiving end of the direct link, and the frequency domain reference point is only suitable for the terminal equipment to determine the transmission resource of the direct link when receiving data.

In a second aspect, a communication method is disclosed, including: the network device may determine a frequency domain reference point of the direct connection link, where the frequency domain reference point is a first resource unit of the frequency domain resource of the first link. Further, the network equipment sends first indication information; the first indication information is used for indicating a frequency domain reference point of the direct connection link. It should be noted that the network device may broadcast the first indication information, or may indicate the first indication information through an RRC message.

In the method provided by the embodiment of the invention, the network device can configure the frequency domain reference point for the direct link, so that the transceiver device on the direct link can determine the frequency domain resource of the direct link according to the frequency domain reference point configured for the direct link by the network device. In the prior art, each terminal device configures transmission resources of a direct link according to a frequency domain reference point of a cell in which the terminal device resides, which may cause misalignment of the transmission resources configured on the direct link by each terminal device, and further cause that the terminal devices cannot communicate with each other through the direct link. In the embodiment of the invention, the frequency domain reference points of the direct link can be uniformly configured in different cells, and the transmitting terminal equipment and the receiving terminal equipment of the direct link can determine the frequency domain reference points of the direct link, so that the transmission resources configured for the direct link by the transmitting terminal equipment and the receiving terminal equipment are aligned, and the transmitting terminal equipment and the receiving terminal equipment can directly communicate through the direct link, thereby improving the communication efficiency of the direct link.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the first indication information is a first offset parameter, and the first offset parameter is a number of resource units offset between a frequency domain reference point and a frequency domain reference point of the cellular link.

With reference to the second aspect, in a second possible implementation manner of the second aspect, the first indication information is an absolute radio channel number ARFCN.

With reference to the second aspect or the first or second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the method further includes: the network equipment sends an offset parameter; the second offset parameter is the number of resource units between the frequency domain reference point of the direct connection link and the frequency domain position of the frequency domain resource of the first link, or the second offset parameter is used for indicating the offset between the frequency domain reference point and the frequency domain position of the frequency domain resource of the direct connection link; the frequency domain position is the first resource unit of the carrier where the direct connection link is located, or the first resource unit of the resource pool of the direct connection link.

With reference to the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the offset indicated by the second offset parameter is Q common subcarrier intervals; or, the second offset parameter indicates an offset amount of at least one of: m REs, N RBs; wherein M, N, Q are all non-negative integers.

With reference to the fourth possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, the offset between the frequency domain reference point and the frequency domain position indicated by the second offset parameter is (12 × m + n) REs.

With reference to the fourth or fifth possible implementation manner of the second aspect, in a sixth possible implementation manner of the second aspect, when the frequency domain resource of the first link belongs to the first frequency range, the common subcarrier interval is a first subcarrier interval; when the frequency domain resource of the first link belongs to a second frequency range, the common subcarrier interval is a second subcarrier interval; wherein the first frequency domain range is a frequency domain range not greater than 6 GHz and the second frequency domain range is a frequency domain range greater than 6 GHz.

With reference to the sixth possible implementation manner of the second aspect, in a seventh possible implementation manner of the second aspect, the first subcarrier interval is 15kHz, and the second subcarrier interval is 60kHz.

With reference to the second aspect or any one of the first to seventh possible implementation manners of the second aspect, in an eighth possible implementation manner of the second aspect, the frequency domain reference point is a specific frequency domain reference point of the direct connection link.

With reference to the second aspect or any one of the first to seventh possible implementation manners of the second aspect, in a ninth possible implementation manner of the second aspect, the frequency domain reference point is a cell common frequency domain reference point, or the frequency domain reference point is a frequency domain reference point of a cell where the first device resides.

With reference to the second aspect or any one of the first to seventh possible implementation manners of the second aspect, in a tenth possible implementation manner of the second aspect, the frequency domain reference point is a frequency domain reference point dedicated to a sending end of the direct connection link, or the frequency domain reference point is a frequency domain reference point dedicated to a receiving end of the direct connection link.

In a third aspect, a communication device is disclosed, comprising: the processing unit is used for determining a frequency domain reference point of the frequency domain resource of the direct connection link, wherein the frequency domain reference point of the direct connection link is a first resource unit of the frequency domain resource of the direct connection link; the processing unit is further configured to determine a frequency domain resource of the first link, where the first link is a direct link of the communication device; a communication unit, configured to transmit data on the frequency domain resource of the first link or receive data on the frequency domain resource of the first link. It should be noted that the communication device may be a terminal device, such as: user Equipment (UE), which may also be a network device, such as: and a base station. Wherein the processing unit may be a processor of the communication device and the communication unit may be a transceiver of the communication device.

In some embodiments, the communication device may also be a separate component, which may be a component in a terminal device or a component in a network device. Wherein the processing unit may be a processor of the component and the communication unit may be a communication interface of the component.

In some embodiments, the communication device may also be a chip, which may be one running in a network device or a terminal device. Wherein, the processing unit may be a processor of the chip, and the communication unit may be a communication interface of the chip, such as: a pin of the chip.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the communication unit is further configured to receive a first offset parameter sent by the network device, where the first offset parameter is a number of resource units offset between a frequency domain reference point and a frequency domain reference point of a cellular link, or the first offset parameter is used to indicate an offset between the frequency domain reference point and the frequency domain reference point of the cellular link, and the offset is at least one of: m resource elements RE and N resource blocks RB, wherein M, N is a non-negative integer; the processing unit is specifically configured to determine a frequency domain reference point according to the frequency domain reference point of the cellular link and the first offset parameter.

With reference to the third aspect, in a second possible implementation manner of the third aspect, the communication unit is further configured to receive an absolute radio channel number ARFCN sent by the network device; the processing unit is specifically configured to determine the frequency domain position indicated by the ARFCN as a frequency domain reference point.

With reference to the third aspect or the first or second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the communication unit is further configured to receive a second offset parameter sent by the network device, where the second offset parameter is a number of resource units between a frequency domain reference point of the direct connection link and a frequency domain position of the frequency domain resource of the first link, or the second offset parameter is used to indicate an offset between the frequency domain reference point and the frequency domain position of the frequency domain resource of the first link, where the frequency domain position is a first resource unit of a carrier where the first link is located, or a first resource unit of a resource pool of the direct connection link.

With reference to the third possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, the offset indicated by the second offset parameter is Q common subcarrier intervals, or the offset indicated by the second offset parameter is at least one of: m resource elements RE and N resource blocks RB; wherein M, N, Q are all non-negative integers.

With reference to the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, the offset between the frequency domain reference point and the frequency domain position, which is indicated by the second offset parameter, is (12 × m + n) REs.

With reference to the third aspect or the third, fourth, or fifth possible implementation manner of the third aspect, in a sixth possible implementation manner of the third aspect, the processing unit is specifically configured to determine, according to the frequency domain reference point and the second offset parameter, a first resource unit of a carrier where the first link is located, or determine, according to the frequency domain reference point and the second offset parameter, a first resource unit of a resource pool of the direct link.

With reference to the third aspect or any one of the first to sixth possible implementation manners of the third aspect, in a seventh possible implementation manner of the third aspect, the frequency domain reference point is a specific frequency domain reference point of the direct connection link.

With reference to the third aspect or any one of the first to sixth possible implementation manners of the third aspect, in an eighth possible implementation manner of the third aspect, the frequency domain reference point is a frequency domain reference point dedicated to a sending end of the direct connection link, or the frequency domain reference point is a frequency domain reference point dedicated to a receiving end of the direct connection link.

In a fourth aspect, a network device, comprising: the processing unit is used for determining a frequency domain reference point of the direct connection link, wherein the frequency domain reference point is a first resource unit of frequency domain resources of the first link; the communication unit is used for sending indication information; the first indication information is used for indicating a frequency domain reference point of the direct connection link.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the first indication information is a first offset parameter, and the first offset parameter is a number of resource units offset between a frequency domain reference point and a frequency domain reference point of the cellular link.

With reference to the fourth aspect, in a second possible implementation manner of the fourth aspect, the first indication information is an absolute radio channel number ARFCN.

With reference to the fourth aspect or the first or second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the communication unit is further configured to send a second offset parameter; the second offset parameter is the number of resource units between the frequency domain reference point of the direct connection link and the frequency domain position of the frequency domain resource of the first link, or the second offset parameter is used for indicating the offset between the frequency domain reference point and the frequency domain position of the frequency domain resource of the direct connection link; the frequency domain position is the first resource unit of the carrier where the direct connection link is located, or the first resource unit of the resource pool of the direct connection link.

With reference to the third possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the offset indicated by the second offset parameter is Q common subcarrier intervals; or, the second offset parameter indicates an offset amount of at least one of: m REs, N RBs; wherein M, N, Q are all non-negative integers.

With reference to the fourth possible implementation manner of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the offset between the frequency domain reference point and the frequency domain position indicated by the second offset parameter is (12 × m + n) REs.

With reference to the fourth aspect or any one of the first to fifth possible implementation manners of the fourth aspect, in a sixth possible implementation manner of the fourth aspect, the frequency domain reference point is a specific frequency domain reference point of the direct connection link.

With reference to the fourth aspect or any one of the first to fifth possible implementation manners of the fourth aspect, in a seventh possible implementation manner of the fourth aspect, the frequency domain reference point is a frequency domain reference point dedicated to a sending end of the direct connection link, or the frequency domain reference point is a frequency domain reference point dedicated to a receiving end of the direct connection link.

In a fifth aspect, a network device includes: the processor is configured to determine a frequency domain reference point of a direct connection link, where the frequency domain reference point is a first resource unit of frequency domain resources of a first link; the transceiver is used for transmitting indication information; the first indication information is used for indicating a frequency domain reference point of the direct connection link.

With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, the first indication information is a first offset parameter, and the first offset parameter is a number of resource units offset between a frequency domain reference point and a frequency domain reference point of the cellular link.

With reference to the fifth aspect, in a second possible implementation manner of the fifth aspect, the first indication information is an absolute radio channel number ARFCN.

With reference to the fifth aspect or the first or second possible implementation manner of the fifth aspect, in a third possible implementation manner of the fifth aspect, the transceiver is further configured to transmit a second offset parameter; the second offset parameter is the number of resource units between the frequency domain reference point of the direct connection link and the frequency domain position of the frequency domain resource of the first link, or the second offset parameter is used for indicating the offset between the frequency domain reference point and the frequency domain position of the frequency domain resource of the direct connection link; the frequency domain position is the first resource unit of the carrier where the direct connection link is located, or the first resource unit of the resource pool of the direct connection link.

With reference to the third possible implementation manner of the fifth aspect, in a fourth possible implementation manner of the fifth aspect, the offset indicated by the second offset parameter is Q common subcarrier intervals; or, the second offset parameter indicates an offset amount of at least one of: m REs, N RBs; wherein M, N, Q are all non-negative integers.

With reference to the fourth possible implementation manner of the fifth aspect, in a fifth possible implementation manner of the fifth aspect, the offset between the frequency domain reference point and the frequency domain position indicated by the second offset parameter is (12 × m + n) REs.

With reference to the fifth aspect or any one of the first to fifth possible implementation manners of the fifth aspect, in a sixth possible implementation manner of the fifth aspect, the frequency domain reference point is a specific frequency domain reference point of the direct connection link.

With reference to the fifth aspect or any one of the first to fifth possible implementation manners of the fifth aspect, in a seventh possible implementation manner of the fifth aspect, the frequency domain reference point is a frequency domain reference point dedicated to a sending end of the direct connection link, or the frequency domain reference point is a frequency domain reference point dedicated to a receiving end of the direct connection link.

In a sixth aspect, a computer-readable storage medium is disclosed, comprising: the computer readable storage medium has instructions stored therein; when the computer readable storage medium runs on the first device according to any one of the third aspect and any one of the implementation manners of the third aspect, the fifth aspect and any one of the implementation manners of the fifth aspect, the first device is caused to perform the communication method according to any one of the first aspect and any one of the implementation manners of the first aspect.

In a seventh aspect, a computer-readable storage medium is disclosed, comprising: the computer readable storage medium has instructions stored therein; when the computer-readable storage medium is run on the network device according to any one of the above-mentioned fourth aspect and any one of the above-mentioned implementation manners of the fourth aspect, and the above-mentioned sixth aspect and any one of the above-mentioned implementation manners of the sixth aspect, the network device is caused to perform the communication method according to any one of the above-mentioned implementation manners of the second aspect and the second aspect.

In an eighth aspect, a wireless communications apparatus is disclosed that includes: instructions are stored in the wireless communication device; when the wireless communication apparatus is operated on the network device according to any one of the foregoing implementation manners of the fourth aspect and the fourth aspect, and any one of the foregoing implementation manners of the sixth aspect and the sixth aspect, the wireless communication apparatus is a chip, and the network device is caused to perform the communication method according to any one of the foregoing implementation manners of the second aspect and the second aspect.

Drawings

Fig. 1 is a schematic time-frequency diagram of a resource unit according to an embodiment of the present application;

fig. 2 is an architecture diagram of a communication system provided in an embodiment of the present application;

fig. 3 is another architecture diagram of a communication system provided by an embodiment of the present invention;

fig. 4 is another architecture diagram of a communication system provided by an embodiment of the present invention;

fig. 5 is a block diagram of a first device according to an embodiment of the present invention;

fig. 6 is a flowchart illustrating a communication method according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a frequency domain reference point provided by an embodiment of the present invention;

FIG. 8 is another diagram of a frequency domain reference point according to an embodiment of the present invention;

FIG. 9 is another diagram of a frequency domain reference point according to an embodiment of the present invention;

fig. 10 is a schematic diagram illustrating a method for determining a direct link according to an embodiment of the present invention;

fig. 11 is a schematic diagram illustrating another method for determining a direct link according to an embodiment of the present invention;

fig. 12 is another block diagram of the first device according to the embodiment of the present invention;

fig. 13 is another block diagram of the first device according to the embodiment of the present invention;

fig. 14 is a block diagram of a network device according to an embodiment of the present invention;

fig. 15 is another block diagram of a network device according to an embodiment of the present invention;

fig. 16 is another block diagram of a network device according to an embodiment of the present invention.

Detailed Description

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

First, a resource unit according to an embodiment of the present invention will be explained. The resource unit may be composed of a segment of resources continuous in a frequency domain and a time interval in a time domain, and may be a Resource Block (RB), a Resource Element (RE), or a subcarrier interval, or may be a radio channel indicated by an radio channel number (ARFCN). An RB may also be referred to as a Physical Resource Block (PRB). Fig. 1 is a schematic diagram of a time-frequency resource, in which an abscissa represents a time domain and an ordinate represents a frequency domain. Referring to fig. 1, a time-frequency resource composed of one subcarrier in the frequency domain and one symbol in the time domain is one RE, a time-frequency resource composed of 12 consecutive subcarriers in the frequency domain and one slot in the time domain is one RB, and referring to fig. 1, one slot is composed of 7 symbols in the time domain. It should be noted that the number of symbols in one time slot is a predetermined number, and fig. 1 is only an example. The number of symbols in a slot may be 7, 14, 6 or 12, and the like, and the number of symbols in a slot may also be different when the normal cyclic prefix and the extended cyclic prefix are used. ARFCN is a number indicating a fixed radio channel. The subcarrier spacing indicates the size of the interval between two subcarriers, and referring to fig. 1, the subcarrier spacing can be regarded as the distance between the center frequency points of two adjacent subcarriers in the frequency domain.

It should be noted that the "symbol" in the embodiment of the present invention may include, but is not limited to, any of the following: orthogonal Frequency Division Multiplexing (OFDM) symbols, universal filtered multi-carrier (UFMC) symbols, filter bank multi-carrier (FBMC) symbols, generalized Frequency Division Multiplexing (GFDM) symbols, and so forth.

Fig. 2 is a communication system according to an embodiment of the present invention, and referring to fig. 2, the communication system includes a first device, a second device, and a third device. The first device and the second device can communicate through a direct link, the first device and the third device can communicate through the direct link, and the third device and the second device cannot communicate directly. The communication between the linear links may be unicast communication performed between a pair of User Equipments (UEs), multicast or multicast communication performed between one UE and a group of UEs, or broadcast communication performed between one UE and an unlimited user. The embodiment of the present invention does not limit the specific manner in which the device communicates through the direct link.

Referring to fig. 2, the first device, the second device, and the third device may all be network devices, such as: the first device, the second device and the third device are different types of base stations, or the first device, the second device and the third device are the same type of base stations. Specifically, the first device is a donor base station and can directly communicate with a core network, and the first device is a relay base station and can directly communicate with the donor base station. The second device cannot communicate with the host base station, and needs to be forwarded by the relay base station to communicate with the host base station. For example, the first device receives uplink data sent by the second device to the third device and forwards the uplink data to the third device, or the first device receives downlink data sent by the third device to the second device and forwards the downlink data to the second device. The transmission method provided by the embodiment of the invention can allocate transmission resources to the backhaul link between the first device and the second device, and ensure that the first device and the second device can transmit data through the backhaul link. The backhaul link is the first link according to the embodiment of the present invention, and includes: the link between the macro base station and the macro base station, the link between the micro base station and the micro base station, and the link between the macro base station and the micro base station.

Referring to fig. 3, the third device is a network device, which may be a base station, a relay base station, or the like; the first device and the second device are both terminal devices, and may be a vehicle, a User Equipment (UE), or the like. The link between the first device and the third device is a cellular link, and the first device can directly communicate with the third device through the cellular link; the link between the first device and the second device may be a device-to-device (D2D) link or a sidelink (sidelink), and the first device and the second device may directly communicate through the D2D link or the sidelink without forwarding through the base station. The transmission method provided by the embodiment of the invention can allocate transmission resources to the D2D link or sidelink between the first device and the second device, and ensure that data transmission can be carried out between the first device and the second device through the D2D link or sidelink. The D2D link or sidelink is the first link according to the embodiment of the present invention. It should be noted that, in the communication system shown in fig. 2, if the first device and the second device are terminal devices and the third device is a network device, the first device and the second device are both terminal devices that reside in the coverage area of the serving cell of the third device.

Of course, the first device and the second device may also reside in different cells, for example, referring to fig. 4, the first device resides in the coverage area of the serving cell of the third device, and the second device resides in the coverage area of the serving cell of the fourth device. The first device and the third device are in a cellular link, the first device and the third device can directly communicate through the cellular link, the second device and the fourth device are in a cellular link, and the second device can directly communicate with the fourth device through the cellular link with the fourth device. In order to achieve flexibility of the system and flexible application of spectrum resources, different frequency domain reference points (referred to as point a in the protocol) may be configured for different cells respectively.

It should be noted that the network device involved in the embodiment of the present invention may be a Base Station (BS), and the base station may have various forms, such as a macro base station, a micro base station, a relay station, an access point, and the like. For example, the base station related to the embodiment of the present invention may be a base station in a New Radio (NR), where the base station in the NR may also be referred to as a Transmission Reception Point (TRP) or a Next generation Node B (gNB), may also be a Base Transceiver Station (BTS) in a global system for mobile communication (GSM) or Code Division Multiple Access (CDMA), may also be a Node B (NB) in a Wideband Code Division Multiple Access (WCDMA) system, may also be an evolved Node B (evolved Node B, or eNodeB) in a Long Term Evolution (LTE) system, and may also be a future 5G network of an eNB. The network device related to the embodiment of the present invention may also include a device that is deployed in a radio access network and is capable of performing wireless communication with a terminal, and for example, the device may be a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or the network device may be a network device in a relay station, an access point, and a future 5G network, or a network device in a future evolved Public Land Mobile Network (PLMN), and the like, for example, an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (Node B, NB), a network device controller (base station controller, BSC), a network device transceiver station (base transceiver station, BTS), a home network device (e.g., a home evolved Node B, or a home Node B, a base band unit (base band), and the like. In the embodiment of the present invention, the apparatus for implementing the function of the network device may be a network device, or may be an apparatus, such as a chip, a circuit, or another apparatus, which supports the network device to implement the function. In the embodiment of the present invention, a device for implementing a function of a network device is taken as an example of a network device, and a technical solution provided in the embodiment of the present invention is described.

The terminal equipment related to the embodiment of the invention can also be called as a terminal, can be equipment with a wireless transceiving function, can be deployed on land and comprises indoor or outdoor equipment, handheld equipment, wearable equipment, automobiles or vehicle-mounted equipment; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal equipment may be User Equipment (UE). Wherein the UE comprises a handheld device, an in-vehicle device, a wearable device, or a computing device with wireless communication capabilities. Illustratively, the UE may be a mobile phone (mobile phone), a tablet computer, or a computer with wireless transceiving function. The terminal device may also be a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, a wireless terminal in smart grid, a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and so on. In the embodiment of the present invention, the apparatus for implementing the function of the terminal may be the terminal, or may be an apparatus, such as a chip, a circuit, or another apparatus, which supports the terminal to implement the function. In the embodiment of the present invention, a device for implementing a function of a terminal is taken as an example, and a technical solution provided in the embodiment of the present invention is described.

In the embodiment of the present invention, the frequency domain reference point of the direct connection link may be regarded as a starting position of the frequency domain resource of the direct connection link, where the starting position may be regarded as a first resource unit of the frequency domain resource. A first resource unit of the frequency domain resources of the direct link may be determined according to the frequency domain reference point, for example: the first RB on the direct link resource, RB0, or the position of the frequency domain reference point is the position of the first subcarrier in the first RB0 of the common resource block. Optionally, the common resource blocks are numbered from RB0 to up at certain subcarrier intervals. The common resource block means that when a value is taken for a specified subcarrier interval on one carrier, the allocation, scheduling and signal generation of resources are all uniformly indicated by the common resource block. Optionally, in the present invention, the frequency domain reference point used on the direct link (e.g. sidelink) may be the same as or different from the frequency domain reference point used on the cellular link. Optionally, in the present invention, the frequency domain reference point of the resource used for transmitting the signal on the direct link (e.g. sidelink) and the frequency domain reference point of the resource used for receiving the signal may be the same or different.

Alternatively, the frequency domain reference point may be base station configurable, or may be indicated by preconfigured information when the device conducting the sidleink communication is outside the network.

In the system shown in fig. 4, if the first device and the second device need to perform direct communication through sidelink, and the cell of the third device are configured with different point a. The first device configures transmission resources for the sidelink according to the point a of the cell where the first device resides, and the second device configures transmission resources for the sidelink according to the point a of the cell where the second device resides.

In the scenario shown in fig. 4, the transmission method provided in the embodiment of the present invention can allocate transmission resources to a direct link (for example, sidelink) between a first device and a second device, and ensure that the first device and the second device can communicate via the direct link.

The embodiment of the invention provides a communication method.A first device firstly determines a frequency domain reference point of a direct connection link, wherein the frequency domain reference point of the direct connection link is a first resource unit of frequency domain resources of the direct connection link. The first device may also determine frequency domain resources of a first link according to a frequency domain reference point of the direct link, where the first link is the direct link. Further, the first device may transmit data on frequency domain resources of the first link or receive data on frequency domain resources of the first link. In one possibility, each terminal device configures transmission resources of the direct link according to a frequency domain reference point of a cell in which the terminal device resides, which may cause misalignment of the transmission resources configured on the direct link by each terminal device, and further cause that the terminal devices cannot communicate with each other through the direct link. In contrast, in the embodiment of the present invention, frequency domain reference points of the direct link may be uniformly configured in different cells, and the sending end device and the receiving end device of the direct link may determine the frequency domain reference points of the direct link, so that transmission resources configured for the direct link by the sending end device and the receiving end device are aligned, and the sending end device and the receiving end device may also perform direct communication through the direct link, thereby improving the efficiency of the direct link communication.

The communication method provided by the embodiment of the present invention may be applied to the communication device shown in fig. 5, and the communication device may be a network device or a terminal device. As shown in fig. 5, the communication device may include at least one processor 501, memory 502, transceiver 503, and communication bus 504.

The following describes each constituent element of the communication apparatus in detail with reference to fig. 5:

the processor 501 is a control center of the communication device, and may be a single processor or a collective term for multiple processing elements. For example, processor 501 is a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present invention, such as: one or more microprocessors (digital signal processors, DSPs), or one or more Field Programmable Gate Arrays (FPGAs).

The processor 501 may perform various functions of the communication device by running or executing software programs stored in the memory 502, and calling data stored in the memory 502, among other things.

In particular implementations, processor 501 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. 5, for example, as an embodiment.

In particular implementations, a communication device may include multiple processors, such as processor 501 and processor 505 shown in fig. 5, for example, as an embodiment. Each of these processors may be a single-Core Processor (CPU) or a multi-Core Processor (CPU). A processor herein may refer to one or more communication devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

The Memory 502 may be, but is not limited to, a Read-Only Memory (ROM) or other type of static storage communication device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage communication device that can store information and instructions, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), a magnetic disk storage medium or other magnetic storage communication device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 502 may be separate and coupled to the processor 501 via a communication bus 504. The memory 502 may also be integrated with the processor 501.

The memory 502 is used for storing software programs for implementing the present invention, and is controlled by the processor 501 for execution.

A transceiver 503 for communication with a second device. Of course, the transceiver 503 may also be used for communication with a communication network, such as an ethernet, a Radio Access Network (RAN), a Wireless Local Area Network (WLAN), and so on. The transceiver 503 may include a receiving unit to implement a receiving function and a transmitting unit to implement a transmitting function.

The communication bus 504 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 5, but this is not intended to represent only one bus or type of bus.

The communication device configuration shown in fig. 5 does not constitute a limitation of the communication device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

An embodiment of the present invention provides a communication method, as shown in fig. 6, the method includes the following steps:

601. the network equipment determines a frequency domain reference point of a direct connection link, wherein the frequency domain reference point of the direct connection link is a first resource unit of frequency domain resources of the direct connection link.

Referring to fig. 7, in the embodiment of the present invention, a frequency domain reference point of a direct link may be regarded as a starting position of a frequency domain resource of the direct link, where the starting position may be regarded as a first resource unit of the frequency domain resource of the direct link. For example, the frequency domain reference point may be a frequency domain reference point of a system-defined carrier, or the frequency domain reference point may also be a frequency domain reference point of a bandwidth part (BWP) used for transmission, or the frequency domain reference point may also be a frequency domain reference point of a resource pool for direct link-to-link communication. The resource unit may be an RB, a resource element RE, a common subcarrier spacing, or an ARFCN.

The direct link in the embodiment of the present invention may be a backhaul link between network devices and a terminal device, or an inter-device direct link between a terminal device and a terminal device, such as: D2D link, sidelink, etc., and the direct link may also be a backhaul link between base stations. The network device may configure a frequency domain reference point for the direct link, the sending device on each link may send data using the frequency domain reference point configured for the direct link by the network device, and the receiving device on each link may receive data using the frequency domain reference point configured for the direct link by the network device.

It should be noted that the frequency domain reference point of the direct link may be a frequency domain reference point specific to the direct link. That is, the network device may configure one frequency domain reference point common to all the direct links, and this frequency domain reference point is a frequency domain reference point dedicated to the direct links, distinct from the frequency domain reference point of the cellular link. That is, the network device may configure a specific frequency domain reference point for the cellular link, and the transceiver device of the cellular link may determine the frequency domain resource of the cellular link according to the frequency domain reference point of the cellular link; the network device may also configure a specific frequency domain reference point for the direct link, and the transceiver device of the direct link may determine the frequency domain resource of the direct link according to the frequency domain reference point of the direct link. The transceiver device of the direct link may be the communication device according to the embodiment of the present invention, such as: in the first device according to the embodiment of the present invention, the communication device according to the embodiment of the present invention may be a terminal device or a network device.

In some embodiments, the frequency domain reference point of the direct link is a frequency domain reference point common to the cells. That is to say, the network device may configure a common frequency domain reference point for all cells, and the terminal devices in different cells may use the frequency domain reference point to determine resources of the direct link, and then receive and transmit data through the direct link. Alternatively, the frequency domain reference point common to the cells may be used on a dedicated spectrum or carrier of V2X, such as a carrier on the smart traffic service band at 5.9 GHz. On these carriers, the transceiver devices of the direct links determine the frequency domain resources of the direct links using the frequency domain reference point common to the cells. Optionally, the frequency domain reference point of the direct link may be configured or indicated by a cell in which the transceiver device of the direct link resides, to the transceiver device of the direct link through signaling.

In other embodiments, the network device may configure different frequency domain reference points or cell-specific frequency domain reference points for different cells, and the terminal device determines the frequency domain resources of the direct link using the frequency domain reference points of the respective camped cells. For example, a frequency domain reference point configured for a cell 1 by a network device is RB0, a frequency domain reference point configured for a cell 2 is RB2, a terminal device 1 resides in the cell 1, and a terminal device 2 resides in the cell 2, when the terminal device 1 and the terminal device 2 need to perform direct connection communication through a direct connection link, the terminal device 1 determines a frequency domain resource of the direct connection link according to the frequency domain reference point RB0 of the cell 1, and the terminal device 2 determines the frequency domain resource of the direct connection link according to the frequency domain reference point RB2 of the cell 2. Although different cells are configured with different frequency domain reference points or cell-specific frequency domain reference points, different cells can align time-frequency resources of direct links configured between different cells through an operation, administration, and Maintenance (OAM) system or an X2 interface, thereby implementing direct communication (e.g., V2X communication) of users between different cells. For example, the cell 1 indicates the frequency domain reference point of the cell 1 to the cell 2 through an X2 interface, the cell 2 may determine an offset between the frequency domain reference point of the cell 1 and the frequency domain reference point of the cell 2, and may also indicate the offset to the communication device residing under the cell 2, when the communication devices perform direct connection communication with the communication device residing under the cell 1, the communication device may configure the frequency domain resource of the direct connection link based on the offset, and may finally perform direct connection communication with the communication device residing under the cell 1 on the aligned frequency domain resource. In addition, the frequency reference point for configuring the cell-specific direct link is mainly based on the subcarrier spacing on different cells, and the size of the band and the starting position of the available spectrum in the coexistence field are guaranteed. It is also because the starting positions of the available frequency spectrums of different cells are different, and therefore, the alignment of the transmission resources of the direct links between multiple cells needs to be realized by configuring the frequency domain reference points specific to the cells.

In some embodiments, the frequency domain reference point of the direct link is a frequency domain reference point dedicated to a transmitting end of the direct link, or the frequency domain reference point of the direct link is a frequency domain reference point dedicated to a receiving end of the direct link. That is to say, the network device may configure different frequency domain reference points for the transceiver device on the direct link, the transmitter device on the direct link determines the frequency domain resource of the direct link according to the frequency domain reference point dedicated for the transmitter end of the direct link, and the receiver device on the direct link determines the frequency domain resource of the direct link according to the frequency domain reference point dedicated for the receiver end of the direct link.

In a specific implementation, the ARFCN may indicate a determined location in the frequency domain, and therefore, the network device may use the ARFCN to indicate a frequency domain reference point of the direct link for the direct link, where the frequency domain location indicated by the ARFCN is the first resource unit of the direct link. For example, the frequency domain reference point of the direct link is an ARFCN value of 32000, that is, the frequency position indicated when the ARFCN value of the first resource unit of the direct link is 32000.

In some embodiments, the network device may also configure the frequency domain reference point for the direct link with reference to the frequency domain reference point of the cellular link. In particular, an offset of the frequency domain reference point of the cellular link from the frequency domain reference point of the cellular link may be indicated by the first offset parameter. For example, the first offset parameter may be one or more resource units that are offset between the frequency domain reference point and the frequency domain reference point of the cellular link. The first offset parameter may also indicate an offset between a frequency domain reference point of the cellular link and the frequency domain reference point, the offset being at least one of: m resource elements RE, N resource blocks RB, where M, N is a non-negative integer. In one possible implementation manner, the first offset parameter indicates an offset between a frequency domain reference point of the direct link and a frequency domain reference point of the cellular link, which is (12 × m + n) REs.

For example, referring to fig. 8, the frequency domain reference point of the cellular link is resource block RB0 in fig. 7, and RB4, which is 3 RBs away from the frequency domain reference point of the cellular link, may be determined as the frequency domain reference point of the direct link. And the first offset parameter of the frequency domain reference point of the cellular link and the frequency domain reference point of the direct link is 3 RBs. Of course, the first offset parameter between the frequency domain reference point of the cellular link and the frequency domain reference point of the direct link is not limited to a plurality of RBs, but may be a plurality of REs, or may include the first offset parameters of M RBs and N REs at the same time, where M and N are non-negative integers, or may be a plurality of subcarrier intervals, etc. That is, the frequency domain reference point of the direct link may be one resource unit that is offset from the frequency domain reference point of the cellular link by one or more REs, one resource unit that is offset from the frequency domain reference point of the cellular link by one or more RBs, or one resource unit that is offset from the frequency domain reference point of the cellular link by one or more common subcarrier spacings.

602. The network equipment sends first indication information; the first indication information is used for indicating a frequency domain reference point of the direct connection link.

In a specific implementation, the network device may send the first indication information through broadcast signaling or a Radio Resource Control (RRC) message. That is, the network device may add the first indication information in broadcast signaling, and broadcast the broadcast signaling to indicate the frequency domain reference point of the direct link through the broadcast signaling. The network device may also add the first indication information in an RRC message, and send the RRC message to a receiving device or a sending device on the direct link to indicate the frequency domain reference point of the direct link through the RRC message. Of course, the network device may also send the first indication information separately, which is not limited in this embodiment of the present invention.

In addition, when the network device configures a frequency domain reference point for the direct link with reference to the frequency domain reference point of the cellular link, the network device needs to indicate a first offset parameter between the frequency domain reference point of the reference cellular link and the frequency domain reference point of the direct link. That is to say, the first indication information in the embodiment of the present invention may be a first offset parameter, where the first offset parameter is a first offset parameter between a frequency domain reference point of a cellular link and a frequency domain reference point of a direct link. In some embodiments, the first offset parameter may be a number of resource units offset between a frequency domain reference point of a cellular link and a frequency domain reference point of the direct link. Wherein the resource element may be an RE, an RB, or a subcarrier spacing. For example, the first indication information is N REs offset between the frequency domain reference point of the cellular link and the frequency domain reference point of the direct link, or the first indication information is N RBs offset between the frequency domain reference point of the cellular link and the frequency domain reference point of the direct link, or the first indication information is N common subcarrier spacings offset between the frequency domain reference point of the cellular link and the frequency domain reference point of the direct link.

In some embodiments, when the network device configures the frequency domain reference point of the direct link as an ARFCN, the network device may directly transmit the ARFCN to indicate the frequency domain reference point of the direct link. That is, the first indication information may be an ARFCN. That is, the frequency domain reference point of the direct link is the frequency domain position indicated by ARFCN, such as: the frequency domain reference point of the direct link is the wireless channel indicated by the ARFCN.

603. The first device determines a frequency domain reference point of the direct link.

It should be noted that the first link is a direct link of the first device, such as: the first link is a direct link between the first device and the second device in the system shown in fig. 2 to 4. In addition, the first link may be a unicast link, a multicast link, or a broadcast link, and the specific form of the first link is not limited in the embodiment of the present invention. In this embodiment of the present invention, the first device is a sending device or a receiving device on the first link, and may send data to the second device through the first link, or may receive data sent by the second device through the first link. The first device may be a terminal device or a network device.

In some embodiments, the first device may receive an RRC message or broadcast signaling sent by the network device to obtain the first indication, and may also receive first indication information sent by the network device. Further, the first device may determine a frequency domain reference point of the direct connection link according to the first indication information. It should be noted that the first indication information sent by the network device indicates the frequency domain reference point of the direct connection link. In addition, the frequency domain reference point of the direct connection link may also be predefined, and the first device may determine the frequency domain reference point of the direct connection link without receiving the first indication information sent by the network device.

604. The first device determines frequency domain resources of a first link.

In the embodiment of the present invention, the frequency domain reference points of the direct links are frequency domain reference points of all the direct links, such as: the frequency domain reference point of the direct link may be used as the frequency domain reference point of the direct link of the first device (i.e., the first link according to the embodiment of the present invention). Further, the first device may determine, according to the frequency domain reference point of the direct connection link, a first resource unit of the frequency domain resource of the first link, such as: the first RB of the frequency domain resource of the first link, or the first RE in the first RB of the frequency domain resource of the first link.

In some embodiments, the network device may also send a second offset parameter prior to step 604; the second offset parameter is the number of resource units between the frequency domain reference point of the direct connection link and the frequency domain position of the frequency domain resource of the first link, or the second offset parameter is used for indicating the offset between the frequency domain reference point of the direct connection link and the frequency domain position of the frequency domain resource of the direct connection link; the frequency domain position is a first resource unit of a carrier where the direct connection link is located, or a first resource unit of a resource pool of the direct connection link. The resource pool includes a resource set in BWP or BWP for direct link transmission, or a resource set in a carrier.

Since the first link is a direct link, after receiving the second offset parameter sent by the network device, the first device may determine the frequency domain position of the first link according to the frequency domain reference point of the direct link and the obtained second offset parameter. For example, referring to fig. 9, the first device may determine the first resource unit of the carrier where the first link is located according to the frequency domain reference point of the direct link and the second offset parameter. Or, the first resource unit of the resource pool of the direct link may also be determined according to the frequency domain reference point of the direct link and the second offset parameter, and since the resource pool of the direct link may be the resource pool of the direct link of the terminal device, the first resource unit of the resource pool of the first link of the first device may also be considered to be determined.

The RE is a resource element (resource element), and is indicated as each element in a resource grid at a specific subcarrier interval, and it may be numbered in the whole carrier or in each RB. An RB refers to a resource unit occupying a plurality of consecutive REs by a predefined length in the frequency domain. For example, there may be 12 REs in one RB. A PRB is a resource unit defined to occupy a plurality of consecutive REs by a predefined length on a frequency domain in a carrier or a Bandwidth Part (BWP).

In a specific implementation, the offset indicated by the second offset parameter is Q common subcarrier intervals; or, the offset indicated by the second offset parameter is at least one of the following parameters: m REs, N RBs; wherein M, N, Q are all non-negative integers.

In one possible implementation manner, the second offset parameter indicates an offset between a frequency domain reference point of the direct link and the frequency domain position, which is (12 × m + n) REs. It can be understood that, assuming that the frequency domain reference point of the direct link is RE0, the first RE of the carrier where the first link is located may be one RE that is separated from RE0 by (12 × m + n) REs.

605. The first device transmits data on the frequency domain resources of the first link, or the first device receives data on the frequency domain resources of the first link.

Specifically, when the first device needs to perform direct connection communication with the second device, the first device may further determine the frequency domain resource of the first link after determining the frequency domain reference point of the direct connection link, and then may send or receive data on the frequency domain resource of the first link. The second device may be a terminal device or a network device.

Of course, the second device may also determine the frequency domain reference point of the direct connection link by receiving the first indication information sent by the base station, further determine the frequency domain resource of the first link, and then may send data or receive data on the frequency domain resource of the first link.

Alternatively, the base station may define the location of a common resource block by a frequency domain reference point and then indicate the frequency domain resources for communication over a direct link (e.g., sidelink) on the common resources.

Optionally, the configuration information of the frequency domain reference point may be obtained through broadcast signaling or preconfigured information at the first device and/or the second device performing the direct link communication. The first device and/or the second device receives configuration information of frequency domain resources for communication on the direct link or selects resources for transmission of the direct link according to rules defined by a protocol, and the configuration information is configured by the base station according to the frequency domain reference point. And then the first device and/or the second device acquire frequency domain resources for communication on the direct link according to the configuration information.

Since the network devices configure the frequency domain reference point for the direct connection link in a unified manner, the frequency domain resources configured for the first link by the first device and the second device according to the frequency domain reference point are aligned, and the first device and the second device can perform direct connection communication through the first link.

It should be noted that, when the frequency domain resource of the first link (or the direct link according to the embodiment of the present invention) belongs to the first frequency range, the common subcarrier interval according to the embodiment of the present invention is the first subcarrier interval. Wherein the first frequency domain range may be a frequency domain range of not less than 0 and not more than 6 GHz, and the first subcarrier spacing may be 15kHz.

When the frequency domain resource of the first link (or the direct link according to the embodiment of the present invention) belongs to the second frequency range, the common subcarrier interval is the second subcarrier interval. Wherein the second frequency domain range may be a frequency domain range greater than 6 GHz and the second subcarrier spacing may be 60kHz.

In some embodiments, the network device also sends at least one of the following parameters: a subcarrier spacing of frequency domain resources of the first link; a bandwidth of a frequency domain resource of the first link; BWP configuration information on the first link.

The first device may receive at least one of a subcarrier spacing of frequency-domain resources of the first link, a bandwidth of the frequency-domain resources of the first link, and BWP configuration information on the first link, which is transmitted by a network device.

Further, the first device may also determine the frequency domain resource of the first link according to a frequency domain reference point of a direct connection link, a subcarrier interval of the frequency domain resource of the first link, and a bandwidth of the frequency domain resource of the first link; and/or the presence of a gas in the atmosphere,

the first device determines the frequency domain resource of the first link according to the frequency domain reference point of the direct link, the BWP configuration information on the first link, and the bandwidth of the frequency domain resource of the first link.

It should be noted that, if the transceiver device of the direct link resides in different cells and the direct link resource pools of different cells are still misaligned on the REs, the network device needs to indicate the difference between the second offset parameters of the cells, so that the receiving device on the direct link can determine, according to the information indicated by the network device, the frequency domain resource where the sending device on the direct link really sends data, and further, can receive the data. Specifically, the network device may send an inter-cell bias information table through SIB or RRC message, where the inter-cell bias information table records: an identity of at least one cell; a deviation indication information between the second offset parameter of each of the at least one cell and the second offset parameter of the serving cell. Wherein, the deviation indication information may indicate a plurality of resource units, such as: multiple REs, multiple RBs, multiple common subcarrier spacings, or ARFCNs.

When the first link is a direct link between the first device and the second device, the first device and the second device can perform direct communication through the first link. When the first device needs to send data through the frequency domain resource of the first link, before the first device sends data through the frequency domain resource of the first link, the identifier of the cell where the first device is located may also be sent to the second device through the first link. In this way, the second device may determine, according to the obtained deviation indication information, the first RE of the first device that really transmits data, and ensure that the transceiver devices are aligned on the REs.

Accordingly, the second device first receives the identifier of the first cell sent by the first device before receiving the data sent by the first device through the first link. Further, according to the identification of the first cell, a deviation information table between the cells is queried, and deviation indication information between the second deviation parameter of the first cell and the second deviation parameter of the serving cell is determined. And then, inquiring a deviation information table between the cells according to the cell identification of the second equipment, and determining deviation indication information between the second deviation parameter of the second cell and the second deviation parameter of the service cell. And then obtaining deviation indication information between the second deviation parameter of the first cell and the second deviation parameter of the second cell. Illustratively, a first device resides in cell 1 and a second device resides in cell 2. The first device sends the identity of cell 1 to the second device over the first link. After receiving the identifier of the cell 1 sent by the first device, the second device queries the offset information table between the cells according to the identifier of the cell 1 to obtain that the offset indication information between the cell 1 and the serving cell is X REs. Further, the second device queries the inter-cell deviation information table according to the identity of the cell 2, which is the identity of the cell where the second device resides, to obtain that the deviation indication information between the cell 2 and the serving cell is Y REs; then the frequency domain location of cell 1 differs from the frequency domain location of cell 2 by X-Y REs. The second device may determine, according to the determined difference (| X-Y | REs), an RE to which the first device transmits data, and further, the second device may align received data on the RE to which the first device transmits data, thereby reducing out-of-band interference.

In some embodiments, the direct link and the cellular link may share one carrier. Illustratively, a link between the first device and the second device is referred to as a first link, a link between the first device and the third device is referred to as a second link, and in addition, the first device resides in cell 1 and the second device resides in cell 2. In the embodiment of the present invention, the first link and the second link may operate on the same carrier, that is, data on the cellular link and data on the direct link may be transmitted on one carrier. The data on the cellular link and the data on the direct link may be transmitted in a frequency division manner or in a time division manner. According to different configurations of frequency domain resources of different cells, the configuration of the frequency domain reference point of the direct connection link by the network device may be implemented as follows:

in a first method, aligned resource units exist in frequency domain resources of different cells, a network device may configure an originally aligned resource unit between cells as a frequency domain reference point of a direct link, and the network device further needs to indicate the originally aligned resource unit between cells through a specific signaling.

For example, the subcarrier intervals on the frequency domain resources of different cells are aligned, but the PRBs are not aligned, and the network device may configure the aligned subcarrier intervals between the cells as a frequency domain reference point of the direct link; alternatively, ARFCNs on different cell frequency domain resources are aligned, such as: when the transmission resource of the direct connection link belongs to FR1 (frequency domain range not greater than 6 GHz), the frequency domain resources of different cells are aligned by taking the subcarrier interval of 15kHz as a unit; the transmission resources of the direct link belong to FR2 (frequency domain range larger than 6 ghz) and the frequency domains of different cells are aligned in units of 60kHz. The network device may configure the inter-cell aligned ARFCNs as frequency domain reference points for the direct links.

Or, the REs on the frequency-domain resources of different cells are aligned, but the PRBs are not aligned, and the network device may configure the aligned REs between cells as the frequency-domain reference point of the direct link.

Referring to fig. 10, point a of cell 1 and cell 2 are not aligned, REs of frequency domain resources of cell 1 and cell 2 may be aligned, and resource units of other granularities are not aligned, such as: the PRBs of cell 1 and cell 2 are not aligned. To implement communication between a first device and a second device via a direct link, it is necessary to ensure that frequency domain resources of the direct link configured by the first device are aligned with frequency domain resources of the direct link configured by the second device. In the scenario shown in fig. 10, REs of frequency domain resources of cell 1 and cell 2 are aligned, and the first device and the second device may perform direct connection communication based on the aligned REs. Further, the network device needs to indicate the aligned REs of cell 1 and cell 2 through specific signaling.

It should be noted that the resource units shown in fig. 10 are only an example given to help understanding the present solution, such as: the inclusion of two REs in the frequency domain for one PRB is merely an example, and the relation between the resource units in a specific implementation refers to fig. 1.

In a first implementation, the network device may indicate the aligned resource units between cells through broadcast signaling or an RRC message. Taking RE alignment between cells as an example, the information that the network device may indicate through broadcast signaling or RRC message includes the following:

a1: PRB indication information and RE indication information. The PRB indication information is used to indicate a first PRB starting from frequency domain resources of a direct link, and the RE indication information is used to indicate a first RE used for the direct link in the first PRB. For example, when the PRB includes 12 REs, the RE indication information may take the value of {0,1,2,. . . ,11}.

It should be noted that, if the frequency domain reference point configured by the network device for the direct link is ARFCN, RB, or subcarrier spacing, it is not necessary to indicate a resource unit with a smaller granularity in the first resource unit of the direct link, for example: if the frequency domain reference point configured for the direct link by the network device is an ARFCN, the REs in the ARFCN need not be indicated.

A2: bandwidth indication information, where the bandwidth indication information is used to indicate a bandwidth of a resource pool for direct link transmission and/or a bandwidth of a BWP for direct link transmission, and in some embodiments, the bandwidth indicated by the bandwidth indication information may be multiple PRBs.

Through the bandwidth indication information, the network device may indicate a continuous segment of frequency domain resources for direct link transmission.

A3: subcarrier spacing indication information indicating subcarrier spacing for direct link transmission.

It should be noted that the subcarrier spacing transmitted by the direct link may be different from the subcarrier spacing transmitted by the cellular link, and therefore the subcarrier spacing used for the direct link transmission needs to be indicated, otherwise, the terminal device cannot determine the subcarrier spacing (SCS) transmitted on the direct link.

It should be noted that, if the frequency domain reference point configured by the network device for the direct link is not an RE, that is, the configured direct link resource pool cannot be aligned with REs among different cells, the network device may further indicate an inter-cell offset information table in an SIB or an RRC message, where the inter-cell offset information table may include at least one cell identifier and offset indication information between the second offset parameter of each cell and the second offset parameter of the serving cell. Table 1 below is a possible inter-cell bias information table:

TABLE 1

Cell identity	Deviation indication information
		Identification of cell 1	X1
Identification of cell 2	X2
		Identification of cell 3	X3
……	……
		Identification of cell n	Xn

Referring to table 1, X1 is deviation indication information between the second offset parameter of cell 1 and the second offset parameter of the serving cell, and X1 is deviation indication information between the second offset parameter of cell 2 and the second offset parameter of the serving cell; xn is the deviation indication information between the second offset parameter of cell N and the second offset parameter of the serving cell. The unit of the deviation indication information is RE or common subcarrier spacing or ARFCN, that is, the deviation indication information indicates that the second offset parameter of a certain cell differs from the second offset parameter of the serving cell by a radio channel indicated by multiple REs or multiple common subcarrier spacings or multiple ARFCNs.

In addition, the deviation information table between cells may also be predefined, and the identities of different cells may be the same, or each cell may have its own identity. When a group of cells shares a cell identity, the group of cells has the same deviation indication information.

The second, different cell frequency domain resources do not have aligned resource units, the network device may divide a segment of frequency domain resources as the frequency domain resources of the first link, further, the network device configures the first resource unit of the divided segment of frequency domain resources as the frequency domain reference point of the direct link, and the network device needs to indicate the first resource unit of the divided frequency domain resources through a specific signaling.

For example, referring to fig. 11, the network device divides a segment of aligned frequency domain resources on the frequency domain resources of different cells, i.e. a segment of frequency domain resources marked by dashed lines in fig. 11. The resource may be used as a transmission of a direct link, and the network device needs to indicate a starting position of the resource, i.e. a first resource unit on the resource, such as: the first RE on the segment of resources, or the first RB on the segment of resources, or the first subcarrier spacing on the segment of resources. Of course, the first resource unit on the segment of resources may also be a radio channel indicated by the ARFCN.

Referring to fig. 11, there may be no alignment between different cells such as PRBs or REs on the partitioned resource segment, for example, in fig. 11, where a rectangular box represents one RE, the boundary of the partitioned resource is just aligned with the boundary of one RE on the resource of cell 1, but the boundary of the partitioned resource is not aligned with the boundary of the RE on the resource of cell 1. In this scenario, the network device may indicate a first resource unit of the segment of frequency-domain resources, and specifically may indicate a real position of a boundary of the segment of frequency-domain resources on the frequency domain. For example, referring to fig. 11, the boundary of the frequency domain resource is aligned with the boundary of the radio channel indicated by the ARFCN, and the network device may determine that the frequency domain reference point of the direct link is the radio channel indicated by the ARFCN, and then send the ARFCN through broadcast signaling or RRC message.

It should be noted that, because PRBs or REs between different cells may not be aligned on the divided resource, a sending device of a direct link needs to use a certain filter to suppress out-of-band interference caused by misalignment of REs between different cells when sending data.

In a first implementation, the network device may indicate the resource units aligned between the cells through broadcast signaling or an RRC message. Taking RE alignment between cells as an example, the information that the network device may indicate through broadcast signaling or RRC message includes the following:

a1: the frequency domain reference point of the direct link is the first resource unit of a segment of frequency domain resources divided on the frequency domain resources of different cells, and the resource unit may be an RE, an RB, or a common subcarrier spacing instance, and may also be a radio channel indicated by the ARFCN.

A2: bandwidth indication information for indicating a bandwidth of a resource pool for direct link transmission and/or a bandwidth of a BWP for direct link transmission, and in some embodiments, the bandwidth indicated by the bandwidth indication information may be a plurality of PRBs.

In some embodiments, the direct link and the cellular link have dedicated carriers, i.e., the direct link and the cellular link operate on different carriers. Illustratively, a link between the first device and the second device is referred to as a first link, a link between the first device and the third device is referred to as a second link, and in addition, the first device resides in cell 1 and the second device resides in cell 2. The first link may be a cellular link, the second link may be a direct link, and the network device may configure different frequency domain reference points for the cellular link and the direct link, which specifically includes:

the network device may configure the frequency domain reference point of the direct connection link according to the frequency domain reference point of the cellular link, and specifically, determine one frequency domain location of the plurality of resource units in the frequency domain with the frequency domain reference point of the cellular link as the frequency domain reference point of the direct connection link. The network device further needs to indicate the frequency domain position determined according to the frequency domain reference point of the cellular link as the frequency domain reference point of the direct link through a specific signaling.

a1: the frequency domain reference point indication information, that is, the first indication information according to the embodiment of the present invention, is used to indicate a frequency domain reference point of the direct link, that is, a first resource unit on a frequency domain resource configured for the direct link, where the resource unit may be an RE, an RB, or a common subcarrier spacing example, and may also be a radio channel indicated by an ARFCN.

Fig. 12 shows a schematic diagram of a possible structure of the communication device according to the above embodiment, in the case of dividing each functional module by corresponding functions. As shown in fig. 12, the communication apparatus includes a processing unit 1201 and a communication unit 1202.

A processing unit 1201 for enabling the communication device to perform steps 603, 604 in the above-described embodiments, and/or other processes for the techniques described herein.

A communication unit 1202 for enabling the communication device to perform steps 602, 605 in the above embodiments, and/or other processes for the techniques described herein.

It should be noted that all relevant contents of each step related to the method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

For example, in the case of using an integrated unit, a schematic structural diagram of a communication device provided in an embodiment of the present application is shown in fig. 13. In fig. 13, the communication apparatus includes: a processing module 1301 and a communication module 1302. Processing module 1301 is used to control and manage the actions of the communication device, e.g., to perform the steps performed by processing unit 1201 described above, and/or other processes for performing the techniques described herein. The communication module 1302 is configured to perform the steps performed by the communication unit 1202, and support interaction between the communication device and other devices, such as interaction with a second device and a communication device. As shown in fig. 13, the communication device may further include a storage module 1303, and the storage module 1303 is used for storing program codes and data of the communication device.

When the processing module 1301 is a processor, the communication module 1302 is a transceiver, and the storage module 1303 is a memory, the communication device is the communication device shown in fig. 5.

Fig. 14 shows a schematic diagram of a possible structure of the network device in the above embodiment, in the case of dividing each functional module according to each function. As shown in fig. 14, the network device includes a processing unit 1401 and a communication unit 1402.

A processing unit 1401 for enabling the network device to perform step 601 in the above embodiments, and/or other processes for the techniques described herein.

A communication unit 1402 for enabling the network device to perform step 602 in the above embodiments, and/or other processes for the techniques described herein.

It should be noted that all relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

For example, in the case of using an integrated unit, a schematic structural diagram of a network device provided in an embodiment of the present application is shown in fig. 15. In fig. 15, the network device includes: a processing module 1501 and a communication module 1502. Processing module 1501 is used to control and manage the actions of the network device, e.g., to perform the steps performed by processing unit 1401 described above, and/or to perform other processes for the techniques described herein. The communication module 1502 is configured to perform the steps performed by the communication unit 1402, and support interaction between the network device and other devices, such as interaction with a second device and a network device. As shown in fig. 15, the network device may further include a storage module 1503 for storing program codes and data of the network device.

When the processing module 1501 is a processor, the communication module 1502 is a transceiver, and the storage module 1503 is a memory, the network device is the network device shown in fig. 16.

The following describes each component of the network device in detail with reference to fig. 16:

the processor 1601 is a control center of a network device, and may be a single processor or a combination of multiple processing elements. For example, the processor 1601 is a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present invention, such as: one or more microprocessors (digital signal processors, DSPs), or one or more Field Programmable Gate Arrays (FPGAs).

The processor 1601 may perform various functions of the network device by running or executing software programs stored in the memory 1602 and invoking data stored in the memory 1602, among other things.

In a particular implementation, processor 1601 may include one or more CPUs, such as CPU0 and CPU1 shown in fig. 16, as an example.

In particular implementations, the network device may include multiple processors, such as processor 1601 and processor 1605 shown in FIG. 16, for example, as an embodiment. Each of these processors may be a single-Core Processor (CPU) or a multi-Core Processor (CPU). A processor herein may refer to one or more network devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

The Memory 1602 may be a Read-Only Memory (ROM) or other type of static storage network device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage network device that can store information and instructions, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), a magnetic disk storage medium or other magnetic storage network device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to. The memory 1602 may be separate and coupled to the processor 1601 by a communication bus 1604. The memory 1602 may also be integrated with the processor 1601.

The memory 1602 is used for storing software programs for implementing the present invention, and is controlled by the processor 1601.

A transceiver 1603 for communication with a second device. The transceiver 1603 may be an antenna array of a network device. Of course, the transceiver 1603 may also be used to communicate with a communication network, such as an ethernet, a Radio Access Network (RAN), a Wireless Local Area Network (WLAN), and the like. The transceiver 1603 may include a receiving unit implementing a receiving function and a transmitting unit implementing a transmitting function.

The communication bus 1604 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 16, but this is not intended to represent only one bus or type of bus.

The network device architecture shown in fig. 16 does not constitute a limitation of network devices and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components.

Through the description of the above embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above functions may be distributed by different functional modules according to needs, that is, the internal structure of the database access apparatus may be divided into different functional modules to complete all or part of the above described functions.

In the several embodiments provided in the present application, it should be understood that the disclosed database access apparatus and method may be implemented in other ways. For example, the above-described database access device embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, multiple units or components may be combined or integrated into another device, or some features may be omitted, or not executed. In addition, the shown or discussed coupling or direct coupling or communication connection between each other may be an indirect coupling or communication connection through some interfaces, database access devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, that is, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially or partially contributed to by the prior art, or all or part of the technical solutions may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip microcomputer, a chip, or the like) or a processor to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of communication, comprising:

the method comprises the steps that a first device determines a frequency domain reference point of frequency domain resources of a direct connection link, wherein the frequency domain reference point is a first resource unit of the frequency domain resources of the direct connection link;

the first device determines frequency domain resources of a first link; the first link is a direct link of the first device;

the first device transmits data on the frequency domain resources of the first link, or the first device receives data on the frequency domain resources of the first link;

the first device determining frequency domain resources of a first link, comprising:

the first device receives a second offset parameter sent by a network device, where the second offset parameter is the number of resource units between the frequency domain reference point of the direct connection link and the frequency domain position of the frequency domain resource of the first link, or the second offset parameter is used to indicate an offset between the frequency domain reference point of the direct connection link and the frequency domain position of the frequency domain resource of the first link, where the frequency domain position is a first resource unit of a carrier where the first link is located, or a first resource unit of a resource pool of the direct connection link.

2. The method of claim 1, wherein the first device determining a frequency domain reference point for a direct link comprises:

the first device receives a first offset parameter sent by a network device, where the first offset parameter is the number of resource units offset between a frequency domain reference point of a cellular link and a frequency domain reference point of the direct link, or the first offset parameter is used to indicate an offset between the frequency domain reference point of the cellular link and the frequency domain reference point of the direct link, and the offset is at least one of: m resource elements RE and N resource blocks RB, wherein M, N is a non-negative integer;

the first device determines the frequency domain reference point from a frequency domain reference point of the cellular link and the first offset parameter.

3. The method of claim 1, wherein the first device determining a frequency domain reference point for the direct link comprises:

the first equipment receives an absolute radio channel number ARFCN sent by network equipment, and determines a frequency domain position indicated by the ARFCN as a frequency domain reference point of the direct connection link.

4. The method according to any of claims 1-3, wherein the second offset parameter indicates an offset of Q common subcarrier intervals, or wherein the second offset parameter indicates an offset of at least one of: m resource elements RE and N resource blocks RB;

wherein, M, N, Q are all nonnegative integers.

5. The method of claim 4, wherein the second offset parameter indicates an offset between the frequency domain reference point of the direct link and the frequency domain location of (12 x M + N) REs.

6. The method of any of claims 1-5, wherein the determining, by the first device, the frequency domain resources of the first link from the frequency domain reference point of the direct link comprises:

the first device determines, according to the frequency domain reference point of the direct connection link and the second offset parameter, a first resource unit of a carrier where the first link is located, or,

and determining a first resource unit of a resource pool of the direct link according to the frequency domain reference point of the direct link and the second offset parameter.

7. The method according to any of claims 1-6, wherein the frequency domain reference point of the direct link is a direct link specific frequency domain reference point.

8. The method according to any of claims 1-6, wherein the frequency domain reference point of the direct link is a frequency domain reference point dedicated to a transmitting end of the direct link, or the frequency domain reference point of the direct link is a frequency domain reference point dedicated to a receiving end of the direct link.

9. A method of communication, comprising:

the network equipment determines a frequency domain reference point of a direct connection link, wherein the frequency domain reference point of the direct connection link is a first resource unit of frequency domain resources of the direct connection link;

the network equipment sends first indication information; the first indication information is used for indicating a frequency domain reference point of the direct connection link;

the network equipment sends a second offset parameter; the second offset parameter is the number of resource units between the frequency domain reference point of the direct connection link and the frequency domain position of the frequency domain resource of the first link, or the second offset parameter is used for indicating the offset between the frequency domain reference point of the direct connection link and the frequency domain position of the frequency domain resource of the direct connection link; the frequency domain position is a first resource unit of a carrier where the direct connection link is located, or a first resource unit of a resource pool of the direct connection link.

10. The method of claim 9, wherein the first indication information is a first offset parameter, and wherein the first offset parameter is a number of resource units offset between a frequency domain reference point of a cellular link and a frequency domain reference point of the direct link.

11. The method according to claim 9, wherein the first indication information is an absolute radio channel number, ARFCN.

12. The method according to any of claims 9-11, wherein the second offset parameter indicates an offset of Q common subcarrier spacings; or, the offset indicated by the second offset parameter is at least one of: m resource elements RE and N resource blocks RB;

wherein M, N, Q are all non-negative integers.

13. The method of claim 12, wherein the second offset parameter indicates an offset between the frequency domain reference point of the direct link and the frequency domain location of (12 x m + n) REs.

14. The method according to any of the claims 9-13, wherein the frequency domain reference point of the direct link is a direct link specific frequency domain reference point.

15. The method according to any of claims 9-13, characterized in that the frequency domain reference point of the direct link is a frequency domain reference point dedicated to a transmit end of the direct link or the frequency domain reference point of the direct link is a frequency domain reference point dedicated to a receive end of the direct link.

16. A communication device, comprising:

a processing unit, configured to determine a frequency domain reference point of a frequency domain resource of a direct connection link, where the frequency domain reference point is a first resource unit of the frequency domain resource of the direct connection link;

the processing unit is further configured to determine a frequency domain resource of the first link; the first link is a direct link of the communication device;

a communication unit, configured to transmit data on frequency domain resources of the first link or receive data on frequency domain resources of the first link;

the communication unit is further configured to receive a second offset parameter sent by a network device, where the second offset parameter is a number of resource units between the frequency domain reference point of the direct connection link and the frequency domain position of the frequency domain resource of the first link, or the second offset parameter is used to indicate an offset between the frequency domain reference point of the direct connection link and the frequency domain position of the frequency domain resource of the first link, where the frequency domain position is a first resource unit of a carrier where the first link is located, or a first resource unit of a resource pool of the direct connection link.

17. The device of claim 16, wherein the communication unit is further configured to receive a first offset parameter sent by a network device, where the first offset parameter is a number of resource units offset between a frequency domain reference point of a cellular link and a frequency domain reference point of the direct link, or the first offset parameter is used to indicate an offset between the frequency domain reference point of the cellular link and the frequency domain reference point of the direct link, and the offset is at least one of: m resource elements RE and N resource blocks RB, wherein M, N is a non-negative integer;

the processing unit is specifically configured to determine the frequency domain reference point of the direct connection link according to the frequency domain reference point of the cellular link and the first offset parameter.

18. The device of claim 16, wherein the communication unit is further configured to receive an absolute radio channel number (ARFCN) transmitted by a network device;

the processing unit is specifically configured to determine a frequency domain position indicated by the ARFCN as the frequency domain reference point.

19. The apparatus according to any of claims 16-18, wherein the second offset parameter indicates an offset of Q common subcarrier spacings or an offset of at least one of: m resource elements RE and N resource blocks RB;

wherein, M, N, Q are all nonnegative integers.

20. The apparatus of claim 19, wherein the second offset parameter indicates an offset between a frequency domain reference point of the direct link and the frequency domain location of (12 × m + n) REs.

21. The device according to any of claims 16 to 20, wherein the processing unit is specifically configured to determine, according to the frequency domain reference point of the direct link and the second offset parameter, a first resource unit of a carrier where the first link is located, or,

22. The apparatus according to any of the claims 16-21, wherein the frequency domain reference point of the direct link is a direct link specific frequency domain reference point.

23. The device according to any of claims 16-21, wherein the frequency domain reference point of the direct link is a frequency domain reference point dedicated to a transmitting end of the direct link, or wherein the frequency domain reference point of the direct link is a frequency domain reference point dedicated to a receiving end of the direct link.

24. A network device, comprising:

a processing unit, configured to determine a frequency domain reference point of a direct link, where the frequency domain reference point of the direct link is a first resource unit of frequency domain resources of the direct link;

a communication unit configured to transmit first indication information; the first indication information is used for indicating a frequency domain reference point of the direct connection link;

the communication unit is further configured to send a second offset parameter; the second offset parameter is the number of resource units between the frequency domain reference point of the direct connection link and the frequency domain position of the frequency domain resource of the first link, or the second offset parameter is used for indicating the offset between the frequency domain reference point of the direct connection link and the frequency domain position of the frequency domain resource of the direct connection link; the frequency domain position is a first resource unit of a carrier where the direct connection link is located, or a first resource unit of a resource pool of the direct connection link.

25. The network device of claim 24, wherein the first indication information is a first offset parameter, and wherein the first offset parameter is a number of resource units offset between a frequency domain reference point of a cellular link and a frequency domain reference point of the direct link.

26. The network device of claim 24, wherein the first indication information is an absolute radio channel number (ARFCN).

27. The network device of any of claims 24-26, wherein the second offset parameter indicates an offset of Q common subcarrier spacings; or, the offset indicated by the second offset parameter is at least one of: m resource elements RE and N resource blocks RB;

wherein, M, N, Q are all nonnegative integers.

28. The network device of claim 27, wherein the second offset parameter indicates an offset between the frequency domain reference point of the direct link and the frequency domain location of (12 x m + n) REs.

29. The network device of any of claims 24-28, wherein the frequency domain reference point of the direct link is a direct link specific frequency domain reference point.

30. The network device of any of claims 24-28, wherein the frequency domain reference point of the direct link is a frequency domain reference point dedicated to a sending end of the direct link, or wherein the frequency domain reference point of the direct link is a frequency domain reference point dedicated to a receiving end of the direct link.