CN115396976A

CN115396976A - Communication method, link selection method, user equipment and network side equipment

Info

Publication number: CN115396976A
Application number: CN202110565044.9A
Authority: CN
Inventors: 徐晓东
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2021-05-24
Filing date: 2021-05-24
Publication date: 2022-11-25

Abstract

The invention provides a communication method, a link selection method, user equipment and network side equipment, belonging to the technical field of communication, wherein the communication method is used for the first user equipment and comprises the following steps: measuring link quality between first user equipment and network side equipment and link quality between the first user equipment and second equipment through a first link and a second link respectively; and carrying out communication by utilizing an operating link selected from the first link and the second link, wherein the operating link is determined jointly according to the measured different link quality metrics and the qualification judgment standard of the link quality metrics corresponding to the first link and the second link respectively. The invention can enable the user equipment to select the working link with higher reliability.

Description

Communication method, link selection method, user equipment and network side equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a communication method, a link selection method, a user equipment, and a network side device.

Background

With the advancement of communication technologies, current User Equipment (UE) supports communication via a first link (which may be referred to as a Uu link) between a base station and the UE and a second link (which may be referred to as a Sidelink link or a SL link) between the UE or a class of UE.

For the above-mentioned user equipment supporting communication via the first link and the second link, when performing communication service, an operating link for communication needs to be selected between the first link and the second link.

In the related art, the criterion for the ue to select the working link may be downlink and/or uplink, and the operation for selecting the working link may be an autonomous decision of the ue or a network decision with the assistance of the ue, which is described below respectively.

The criterion for the user equipment to select the working link may be an uplink optimal principle, and the judgment parameter of the link quality metric of the user equipment on the SL link may include at least one of the following parameters: channel State Information (CSI) of the receiving-end user equipment, reference Signal Received Power (RSRP) of the receiving-end user equipment, the number of antennas of the receiving-end user equipment, and the like; the link quality judgment parameter of the user equipment on the Uu link may include at least one of the following parameters: RSRP and CSI of Sounding Reference Signal (SRS).

The criterion for the user equipment to select the working link may be a downlink optimization principle, and the judgment parameter of the link quality metric of the user equipment on the SL link may include at least one of the following parameters: side link CSI and RSRP of user equipment at a receiving end; the link quality judgment parameter of the user equipment on the Uu link may include at least one of the following parameters: uu link CSI and RSRP.

However, the working link selected by the above scheme cannot guarantee the normal operation of the user equipment, and the main reason is that there often exists a certain difference in the aspects of the transmission power of the base station equipment and the class terminal equipment, the number of antennas, and the like, and it is difficult to guarantee the link selection to be reliable enough only by comparing the uplink or only the downlink, and the downlink may be poor when the selection is often based on the uplink optimum; while the uplink may be degraded when selected based on the downlink optimum.

Disclosure of Invention

The invention provides a communication method, a link selection method, user equipment and network side equipment, which can enable the user equipment to select a working link with higher reliability.

In order to solve the technical problem, the invention is realized as follows:

in a first aspect, the present invention provides a communication method, used for a first user equipment, the communication method including:

measuring link quality between first user equipment and network side equipment and link quality between the first user equipment and second equipment through a first link and a second link respectively;

and carrying out communication by utilizing an operating link selected from the first link and the second link, wherein the operating link is determined jointly according to the measured link quality and a link quality qualification judgment standard corresponding to each of the first link and the second link.

In a second aspect, the present invention provides a link selection method, which is used for a network side device, and the link selection method includes:

receiving a measurement result of a qualified judgment parameter of respective link quality metrics of a first link and a second link, which is sent by first user equipment;

and sending indication information to the first user equipment, wherein the indication information is used for indicating an operating link selected from the first link and the second link.

In a third aspect, the present invention provides a user equipment, including:

a measurement module, configured to measure, through a first link and a second link, link quality between the first user equipment and a network side device and link quality between the first user equipment and a second device, respectively;

the communication module is used for carrying out communication by utilizing a working link selected from the first link and the second link, and the working link is determined jointly according to the measured different link quality metrics and the qualification judgment standard of the link quality metrics corresponding to the first link and the second link respectively.

In a fourth aspect, the present invention provides a network side device, including:

a first receiving module, configured to receive a measurement result of a qualification judgment parameter of a link quality metric of each of a first link and a second link sent by a first user equipment;

a first sending module, configured to send indication information to the first user equipment, where the indication information is used to indicate an operating link selected from the first link and the second link.

In a fifth aspect, the present invention provides a user equipment, including: a processor and a transceiver;

the processor is configured to measure, through a first link and a second link, a link quality between the first user equipment and a network side device and a link quality between the first user equipment and a second device;

the transceiver for communicating using an operating link selected from a first link and a second link, and the working link is determined jointly according to the measured different link quality metrics and the qualification judgment standard of the link quality metrics corresponding to the first link and the second link respectively.

In a sixth aspect, the present invention provides a network side device, including: a processor and a transceiver;

the transceiver is configured to receive a measurement result of a qualification judgment parameter of a link quality metric of each of a first link and a second link sent by a first user equipment;

the transceiver is further configured to send indication information to the first user equipment, where the indication information is used to indicate an operating link selected from the first link and the second link.

In a seventh aspect, the present invention provides a user equipment, comprising a processor, a memory and a computer program stored on the memory and operable on the processor, wherein the computer program, when executed by the processor, implements the steps in the communication method according to the first aspect.

In an eighth aspect, the present invention provides a network-side device, including a processor, a memory, and a computer program stored in the memory and executable on the processor, where the computer program, when executed by the processor, implements the steps in the link selection method according to the second aspect.

In a ninth aspect, the present invention provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps in the communication method according to the first aspect or implements the steps in the link selection method according to the second aspect.

In the embodiment of the invention, the link quality between first user equipment and network side equipment and the link quality between the first user equipment and second equipment are measured through a first link and a second link respectively; and carrying out communication by utilizing an operating link selected from the first link and the second link, wherein the operating link is determined jointly according to the measured different link quality metrics and the qualification judgment standard of the link quality metrics corresponding to the first link and the second link respectively. In this way, the first user equipment can first obtain the correct result of whether the link quality of the first link and the second link is qualified, so that the reliability of the working link selected based on the correct result of whether the link quality of the first link and the second link is qualified is improved.

Drawings

Fig. 1 is a flowchart of a communication method according to an embodiment of the present invention;

fig. 2 is a flowchart of a link selection method according to an embodiment of the present invention;

fig. 3 is a structural diagram of a user equipment according to an embodiment of the present invention;

fig. 4 is a structural diagram of a network side device according to an embodiment of the present invention;

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

fig. 6 is a block diagram of another network-side device according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help the full understanding of the embodiments of the present invention. It will therefore be apparent to those skilled in the art that various changes and modifications can be made in the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

In the related art, the criterion for the ue to select the working link may be downlink and/or uplink, and the operation for selecting the working link may be an autonomous decision of the ue or a network decision assisted by the ue. However, regardless of the decision method or criterion, the decision for both links is based on the same parameters (e.g., CSI and RSRP) and/or the same threshold available for link quality decision parameters.

However, because there is a certain difference between the base station equipment and the similar user equipment in terms of the upper limit of the transmission power, the number of antennas, etc., it cannot be guaranteed that the selected working link can work normally by using the same parameter and/or the same threshold.

For example, due to the great advantage of the base station in the upper limit of the transmission power, even at the cell edge, it is possible that the signal strength of a signal received by a user equipment from the base station is much higher than the signal strength of a signal received from another user equipment. But it may be the case that the communication quality between the user equipment at the cell edge and the base station is much worse than the communication quality between the user equipment and another user equipment.

Therefore, the working link selected based on the related technical scheme cannot ensure the normal operation of the user equipment, and the main reason is that certain differences often exist in the aspects of the transmission power of the base station equipment and the class terminal equipment, the number of antennas and the like, only uplink comparison or only downlink comparison is difficult to ensure that the link selection is reliable enough, and when the selection is often based on the uplink optimization, the downlink may be poor; while the uplink may be degraded when selected based on the downlink optimum.

In the embodiment of the present invention, a new determination mechanism is introduced, for example, a quality metric is set for each link, and the metrics for evaluating the quality of each link are different, for example, the metric used for uulink is RSRP of Rx UE (decision UE), but the metric used for SL link is Pathloss, or the metric used for Peer UE (Peer UE) of decision UE, and another link is selected only when the current link quality metric cannot meet a preset requirement and the other link meets the preset requirement. In this way, the purpose of determining whether other links need to be selected based on whether the links can maintain the necessary service and the necessary link quality can be achieved.

In the communication method according to the specific embodiment of the present invention, a conventional method of selecting an operating link based on the same standard/the same metric (e.g., the same parameter threshold, etc.) is changed, but from the viewpoint of reliability, a unique criterion or policy of each link is set for each link, the criterion or policy of each link being used for determining whether the link can operate normally or avoiding uncertainty of the quality of the selected link (e.g., maintaining a necessary service or maintaining a necessary link quality). At this time, since the criterion or policy for determining whether the link can work normally or avoiding uncertainty of the quality of the selected link (for example, maintaining necessary traffic or maintaining necessary link quality, etc.) is set for the link, the influence of the criterion or policy of other links is avoided.

In other words, in the method according to the embodiment of the present invention, communication is performed using an operating link selected from a first link and a second link, and the operating link is determined jointly according to the measured link quality and the qualification criterion of the link quality metric corresponding to each of the first link and the second link. Because the qualification judgment standards of the respective link quality metrics of the first link and the second link are independent of each other, whether the quality of each link is qualified or not is determined by considering the upper limit of the transmission power of each link, the number of antennas and the like, and the qualification judgment standards are not influenced by the upper limit of the transmission power of the other link, the number of antennas and the like, so that the reliability of selecting the working link can be improved.

As shown in fig. 1, a communication method according to an embodiment of the present invention is used for a first user equipment, and the communication method includes:

step 101, measuring link quality between a first user equipment and a network side device and link quality between the first user equipment and a second device through a first link and a second link respectively;

step 102, a working link selected from a first link and a second link is used for communication, and the working link is determined according to the measured different link quality metrics and the qualification judgment standard of the link quality metrics corresponding to the first link and the second link.

In the method of the embodiment of the invention, the first link and the second link adopt different link quality metrics, and the working link selected from the first link and the second link is used for communication, and the working link is determined jointly according to the measured different link quality metrics and the qualification judgment standard of the link quality metrics corresponding to the first link and the second link respectively. Therefore, the method of the embodiment of the invention can firstly obtain the correct result of whether the link quality of the first link and the second link is qualified, and the reliability of the working link selected based on the correct result of whether the link quality of the first link and the second link is qualified is improved.

Different from the related methods in the prior art, in the communication method according to the embodiment of the present invention, a criterion or a policy for determining whether the link can operate normally (i.e., determining whether the link quality is qualified, or determining whether the link quality can maintain a necessary service, etc.) is set for each link. The difference of the criterion or policy for each link to determine whether the link quality is qualified can be represented as follows:

judging whether the link can work normally or not, wherein the judging parameters of the quality of the link are different; for example, the parameter selected for the first link is a signal strength parameter and the parameter selected for the second link is a signal propagation loss parameter.

Optionally, on the basis of the signal propagation loss parameter, terminal transmission power and number of receive antennas parameters may be further considered, because at sidelink, the calculation of the signal propagation loss by the sending UE is obtained based on the receiving UE feeding back to the sending UE the RSRP signaled by the sending UE by itself, where this RSRP is obtained based on a single antenna assumption, and if this RSRP is referred to as a reference or reference RSRP, if the receiving UE has more receive antennas, it is equivalent to the RSRP received by a single antenna, and its value may be equivalent to an additional receive gain obtained by adding the number of antennas as a conversion factor to the reference or reference RSRP.

That is to say, the link quality metrics corresponding to the first link and the second link may be a signal strength parameter measured by the first link and a signal propagation loss parameter measured by the second link, respectively. For example: the used metric for the first link is the RSRP of itself, but the used metric for the second link is the path loss Pathloss or the received RSRP of the peer user equipment.

In summary, in the embodiment of the present invention, the qualification criterion of the link quality metrics corresponding to the first link and the second link at least includes different link quality metrics, and a qualification determination parameter and/or a determination threshold thereof.

Thus, whether the communication quality of the first link is qualified or not can be determined based on the link quality metric of the first link and a qualification judgment parameter and/or a judgment threshold for judging whether the link quality metric is qualified or not; whether the communication quality of the second link is qualified or not can be further determined based on the link quality metric of the second link and a qualification judgment parameter and/or a judgment threshold for judging whether the link quality metric is qualified or not.

In the embodiment of the present invention, whether the link quality of the link is qualified or not is respectively determined for different links, and it is not necessary to consider the quality comparison between the first link quality and the second link quality under the same metric condition, so that different results can be obtained, and a suitable working link can be selected based on the result of the qualification determination of the link quality, and the following detailed description is provided for the strategy how to determine the working link.

< policy one >

And selecting the second link as the working link when the first user equipment works in the first link currently and the first link does not meet the link quality requirement according to the link quality qualification judgment standard corresponding to the first link and the second link respectively and the second link meets the link quality requirement.

The policy one may indicate: the first user equipment takes one link with qualified link quality as the working link, and avoids communication by utilizing the link with unqualified link quality, thereby improving the reliability of communication. That is, the above-mentioned policy prioritizes reliability of communication quality.

< strategy two >

And selecting the first link as the working link under the condition that the first user equipment works in the first link currently and the first link meets the link quality requirement according to the link quality qualification judgment standard corresponding to the first link and the second link respectively.

The second policy may represent: whatever the second link, the Uu link is selected as long as its link quality is qualified. That is, the second policy prioritizes the use of Uu links for communication.

Whereas the Uu link is a link communicating with a fixed base station and the SL link is a link communicating with another user equipment, mobility and unreliability (e.g. shutdown, setting of flight mode, etc.) of the user equipment may lead to instability of the SL link, which results in a reliability of the Uu link being higher than that of the SL link. The strategy preferentially utilizes the Uu link for communication, and can not perform link switching no matter whether the link quality of the SL link is qualified or not under the condition that the link quality of the Uu link is qualified, so that the communication stability of the first user equipment can be improved, and the link switching frequency can be reduced.

< strategy three >

And when the first user equipment works in the first link currently, judging that the first link and the second link do not meet the link quality requirement according to the link quality qualification judgment standard corresponding to the first link and the second link respectively, and selecting the first link as the working link.

The third policy may represent: and under the condition that the link quality of the first link and the link quality of the second link are not qualified, the link switching is not carried out, so that the link switching frequency is reduced, and unnecessary operation is avoided.

< strategy four >

And when the first user equipment works in the first link currently, judging that the first link and the second link both meet the link quality requirement according to the link quality qualification judgment standard corresponding to the first link and the second link respectively, and selecting the first link as the working link.

The fourth strategy can reduce the link switching frequency and can preferentially utilize the Uu link for communication.

< strategy five >

And when the first user equipment works in the second link currently and the second link does not meet the link quality requirement according to the link quality qualification judgment standard corresponding to the first link and the second link respectively, and the first link is selected as the working link under the condition that the first link meets the link quality requirement.

The policy five may switch the first user equipment from the second link with the unqualified link quality to the first link with the qualified link quality, thereby improving the reliability of the communication of the first user equipment.

< strategy six >

When the first user equipment works in the second link currently and the first link meets the link quality requirement according to the link quality qualification judgment standard corresponding to the first link and the second link, selecting the first link as the working link;

the difference between the strategy six and the strategy five is that: in the sixth policy, regardless of whether the link quality of the second link is qualified, only the link quality of the first link is qualified, and the first link is used as a working link, so that the first link is preferentially utilized for communication.

In this way, in view of the fact that the stability of the first link is higher than that of the second link, the above-mentioned policy six may improve the stability of the communication of the first user equipment.

< strategy seven >

When the first user equipment works in the second link currently, judging that the first link and the second link do not meet the link quality requirement according to the link quality qualification judgment standard corresponding to the first link and the second link respectively, and selecting the second link as the working link;

the seventh strategy is similar to the third strategy, and both strategies can reduce the link switching frequency.

< strategy eight >

And when the first user equipment works in the second link currently, judging that the first link and the second link both meet the link quality requirement according to the link quality qualification judgment standard corresponding to the first link and the second link respectively, and selecting the second link as the working link.

The above strategy eight can reduce the link switching frequency.

Compared with the existing scheme of setting the same criterion, the method of the embodiment of the present invention determines whether to select another link based on whether the link can maintain the necessary service and the necessary link quality, for example, a quality metric (i.e., a link quality qualification judgment parameter) is set for each link, and the metrics evaluated by each link quality are different (e.g., the metric used for the first link is its own RSRP, but the metric used for the second link is a path loss Pathloss, or a received RSRP of the peer user equipment).

Meanwhile, according to the link quality evaluation result, a proper working link can be selected according to different requirements. For example, another link is selected only if the quality metric of the currently operating link cannot meet the preset requirement and the other link meets the preset requirement.

The above-mentioned link quality qualification parameters and/or thresholds may be configured by the network side, for example: respectively configuring the user equipment with: a Uu link quality eligibility metric and/or metric threshold, and a SL link quality eligibility metric and metric threshold. The quality metric of the Uu link may include a signal strength of a signal received by the UE, and the quality metric of the SL link at least includes a signal loss or a signal strength of a signal sent by the UE and received by the UE at the opposite end.

Of course, the signal loss may be obtained directly, or may be obtained indirectly based on the transmission power of the ue and the reception power of the peer ue.

In the embodiment of the present invention, the selection of the working link may be decided by the user equipment, but may also be decided by the network side.

In the case that the selection of the working link is decided by the network side, in an embodiment of the present invention, before performing communication by using the working link selected from the first link and the second link, the method further includes:

sending the measurement result of the qualified judgment parameter of the link quality metric of the first link and the second link to the network side equipment;

and receiving indication information sent by the network side equipment, wherein the indication information is used for indicating the working link determined by the network side equipment.

As shown in fig. 2, the embodiment of the present invention further includes a link selection method for a network device, where the link selection method includes:

step 201, receiving a measurement result of a qualification parameter of the respective link quality metrics of the first link and the second link sent by the first user equipment.

Step 202, sending indication information to the first user equipment, where the indication information is used to indicate an operating link selected from the first link and the second link.

The strategy for determining the working link at the network side is the same as that for determining the working link at the terminal side, and is not described in detail herein.

In addition, in the case that the selection of the working link is decided by the user equipment, before the communication using the working link selected from the first link and the second link, the method further includes:

determining the working link according to the measurement result of the qualified judgment parameter of the link quality metric corresponding to the first link and the second link and the qualified judgment standard of the link quality metric corresponding to the first link and the second link;

and sending a switching request to the network side equipment under the condition that the working link is different from the current working link.

The methods of the examples of the present invention are further described below.

The network side device configures at least one of a metric and a threshold related to the qualification of the Uu link quality and a metric and a threshold related to the qualification of the SL link quality for the terminal, wherein the quality metric of the Uu link may be the signal strength of a signal received by the UE, the quality metric of the SL link may be the signal propagation loss, and the propagation loss may be indirectly calculated through the signal strength of a signal received by the UE at the opposite end.

After the network side is configured, when the UE works on the Uu link, firstly, whether the signal strength of a signal received on the Uu link meets the link quality requirement is judged, and if not, whether the SL link quality meets the link quality requirement is judged. If the quality of the SL link meets the link quality requirement, the UE reports the evaluation results of the two links to the network, and the results can be a switching request (the UE decides to switch to the SL link by itself) or the measurement values of the two links (for the network side to judge whether to switch to the SL or not). Of course, the UE may also decide by itself and select directly to the SL link.

When the UE is on the SL link, if the UE determines that the signal strength of the signal received by the UE on the Uu link meets the link quality requirement, the UE reports the evaluation result of the two links to the network regardless of whether the SL link quality still meets the requirement, where the result may be a handover request or a metric value of the two links; alternatively, the UE selects the link to the Uu link by itself.

In the embodiment of the invention, the link quality between first user equipment and network side equipment and the link quality between the first user equipment and second equipment are measured through a first link and a second link respectively; and carrying out communication by utilizing an operating link selected from the first link and the second link, wherein the operating link is determined jointly according to the measured link quality and a link quality qualification judgment standard corresponding to each of the first link and the second link. In this way, the first user equipment can first obtain the correct result of whether the link quality of the first link and the second link is qualified, so that the reliability of the working link selected based on the correct result of whether the link quality of the first link and the second link is qualified is improved.

Referring to fig. 3, a structural diagram of a first user equipment according to an embodiment of the present invention is shown in fig. 3, where the first user equipment 300 includes:

a measuring module 301, configured to measure, through a first link and a second link, a link quality between the first user equipment and a network side device and a link quality between the first user equipment and a second device;

a communication module 302, configured to perform communication by using an operating link selected from a first link and a second link, where the operating link is determined jointly according to the measured different link quality metrics and the qualification criteria of the link quality metrics corresponding to the first link and the second link.

Optionally, the qualification criterion of the link quality metrics corresponding to the first link and the second link at least includes different link quality metrics, qualification judgment parameters thereof, and/or a judgment threshold thereof.

Optionally, the link quality metrics corresponding to the first link and the second link are a signal strength parameter and a signal propagation loss parameter, respectively, or a signal strength parameter measured by the first link and a signal strength parameter measured by an opposite terminal, respectively.

Optionally, the working link is determined according to at least one of the following policies:

when the first user equipment works in the first link currently and the first link does not meet the link quality requirement according to the link quality qualification judgment standard corresponding to the first link and the second link respectively, selecting the second link as the working link under the condition that the second link meets the link quality requirement;

when the first user equipment works in the first link currently and the first link meets the link quality requirement according to the link quality qualification judgment standard corresponding to the first link and the second link, selecting the first link as the working link;

when the first user equipment works in the first link at present, judging that the first link and the second link do not meet the link quality requirement according to the link quality qualification judgment standard corresponding to the first link and the second link respectively, and selecting the first link as the working link;

when the first user equipment works in the first link at present, judging that the first link and the second link both meet the link quality requirement according to the link quality qualification judgment standard corresponding to the first link and the second link respectively, and selecting the first link as the working link;

when the first user equipment works in the second link currently and the second link does not meet the link quality requirement according to the link quality qualification judgment standard corresponding to the first link and the second link respectively, and the first link is selected as the working link under the condition that the first link meets the link quality requirement;

when the first user equipment works in the second link at present, judging that the first link and the second link do not meet the link quality requirement according to the link quality qualification judgment standard corresponding to the first link and the second link respectively, and selecting the second link as the working link;

Optionally, the first user equipment 300 further includes:

a second sending module, configured to send a measurement result of a qualification judgment parameter of the link quality metric of each of the first link and the second link to the network side device;

and the second receiving module is used for receiving indication information sent by the network side equipment, wherein the indication information is used for indicating the working link determined by the network side equipment.

Optionally, the first user equipment 300 further includes:

a determining module, configured to determine the working link according to a measurement result of a qualification judgment parameter of a link quality metric corresponding to each of a first link and a second link and a qualification judgment standard of a link quality metric corresponding to each of the first link and the second link;

and a third sending module, configured to send a handover request to the network side device when the working link is different from the currently working link.

The first user equipment 300 provided in the embodiment of the present invention may specifically be the first user equipment applying the communication method shown in fig. 1, and the first user equipment 300 can obtain the same beneficial effects as the method embodiment shown in fig. 1, which are not specifically described herein.

Referring to fig. 4, a structural diagram of a network-side device according to an embodiment of the present invention is shown in fig. 4, where the network-side device 400 includes:

a first receiving module 401, configured to receive a measurement result of a qualification judgment parameter of a link quality metric of a first link and a second link sent by a first user equipment;

a first sending module 402, configured to send indication information to the first user equipment, where the indication information is used to indicate an operating link selected from the first link and the second link.

The network side device 400 provided in the embodiment of the present invention may specifically be a network side device applying the link selection method shown in fig. 2, and the network side device 400 can obtain the same beneficial effects as the method embodiment shown in fig. 2, which are not specifically described herein.

Please refer to fig. 5, which is a structural diagram of another first user equipment according to an embodiment of the present application, and as shown in fig. 5, the first user equipment includes: a bus 501, a transceiver 502, an antenna 503, a bus interface 504, a processor 505, and a memory 506.

A processor 505, configured to measure, through a first link and a second link, a link quality between a first user equipment and a network side device and a link quality between the first user equipment and a second device;

a transceiver 502, configured to perform communication by using an operating link selected from a first link and a second link, where the operating link is determined according to different measured link quality metrics and a qualification criterion of the link quality metrics corresponding to the first link and the second link.

when the first user equipment works in the second link at present and the first link is judged to meet the link quality requirement according to the link quality qualified judgment standard corresponding to the first link and the second link, the first link is selected as the working link;

Optionally, before performing the communication using the working link selected from the first link and the second link, the transceiver 502 is further configured to:

Optionally, before the transceiver 502 performs the communication using the working link selected from the first link and the second link:

the processor 505 is further configured to determine the working link jointly according to the measurement result of the qualification judgment parameter of the link quality metric corresponding to each of the first link and the second link and the qualification judgment standard of the link quality metric corresponding to each of the first link and the second link;

the transceiver 502 is further configured to send a handover request to the network side device when the working link is different from the currently working link.

In this embodiment, the first user equipment can implement each process implemented by the first user equipment in the method embodiment shown in fig. 1, and has the same beneficial effects, and for avoiding repetition, details are not repeated here.

In fig. 5, a bus architecture (represented by bus 501), bus 501 may include any number of interconnected buses and bridges, with bus 501 linking various circuits including one or more processors, represented by processor 505, and memory, represented by memory 506. The bus 501 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 504 provides an interface between the bus 501 and the transceiver 502. The transceiver 502 may be one element or may be multiple elements, such as multiple receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the processor 505 is transmitted over a wireless medium via the antenna 503, and further, the antenna 503 receives the data and transmits the data to the processor 505.

The processor 505 is responsible for managing the bus 501 and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And the memory 606 may be used to store data used by the processor 505 in performing operations.

Alternatively, the processor 505 may be a CPU, ASIC, FPGA or CPLD.

Preferably, an embodiment of the present invention further provides a first user equipment, which includes a processor 505, a memory 506, and a computer program that is stored in the memory 506 and is executable on the processor 505, and when the computer program is executed by the processor 505, the computer program implements each process of the communication method embodiment shown in fig. 1, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

Please refer to fig. 6, which is a structural diagram of another network-side device according to an embodiment of the present application, and as shown in fig. 6, the network-side device includes: bus 601, transceiver 602, antenna 603, bus interface 604, processor 605, and memory 606.

A transceiver 602, configured to receive a measurement result of a qualification judgment parameter of a link quality metric of each of a first link and a second link sent by a first user equipment;

the transceiver 602 is further configured to send indication information to the first user equipment, where the indication information indicates an operating link selected from the first link and the second link.

In this embodiment, the network side device can implement each process implemented by the network side device in the method embodiment shown in fig. 2, and has the same beneficial effects, and for avoiding repetition, details are not described here again.

In fig. 6, a bus architecture (represented by bus 601), where bus 601 may include any number of interconnected buses and bridges, where bus 601 links together various circuits including one or more processors, represented by processor 605, and memory, represented by memory 606. The bus 601 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 604 provides an interface between the bus 601 and the transceiver 602. The transceiver 602 may be one element or may be multiple elements, such as multiple receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the processor 605 is transmitted over a wireless medium via the antenna 603, and further, the antenna 603 receives the data and transmits the data to the processor 605.

The processor 605 is responsible for managing the bus 601 and general processing, and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And memory 606 may be used to store data used by processor 605 in performing operations.

Alternatively, processor 605 may be a CPU, ASIC, FPGA or CPLD.

Preferably, an embodiment of the present invention further provides a network-side device, which includes a processor 605, a memory 606, and a computer program stored in the memory 606 and capable of running on the processor 605, where the computer program, when executed by the processor 605, implements each process of the link selection method embodiment shown in fig. 2, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the communication method embodiment shown in fig. 1, or implements each process of the link selection method embodiment shown in fig. 2, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

The computer readable storage medium is, for example, ROM, RAM, magnetic disk or optical disk.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

Through the description of the foregoing embodiments, it is clear to those skilled in the art that the method of the foregoing embodiments may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better implementation. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A communication method for a first user equipment, the communication method comprising:

and carrying out communication by utilizing an operating link selected from the first link and the second link, wherein the operating link is determined jointly according to the measured different link quality metrics and the qualification judgment standard of the link quality metrics corresponding to the first link and the second link respectively.

2. The communication method according to claim 1, wherein:

the qualification judgment standard of the link quality measurement corresponding to each of the first link and the second link at least comprises different link quality measurement, qualification judgment parameters and/or judgment thresholds thereof.

3. The communication method according to claim 2, wherein the link quality metrics corresponding to the first link and the second link are a signal strength parameter and a signal propagation loss parameter, respectively, or a signal strength parameter measured by itself and a signal strength parameter measured by an opposite terminal, respectively.

4. The communication method according to claim 2, wherein the working link is determined according to at least one of the following policies:

5. The communication method according to claim 2, wherein before the communicating using the working link selected from the first link and the second link, further comprising:

6. The communication method according to claim 2, wherein before the communicating using the working link selected from the first link and the second link, further comprising:

7. A link selection method, used in a network side device, the link selection method comprising:

8. A first user device, comprising:

9. A network-side device, comprising:

a first sending module, configured to send indication information to the first user equipment, where the indication information is used to indicate an operating link selected from a first link and a second link.

10. A first user device, comprising: a processor and a transceiver;

the transceiver is configured to perform communication using an operating link selected from a first link and a second link, where the operating link is determined jointly according to different measured link quality metrics and a qualification criterion of the link quality metrics corresponding to the first link and the second link.

11. A network-side device, comprising: a processor and a transceiver;

12. User equipment, characterized in that it comprises a processor, a memory and a computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps in the communication method according to any of claims 1-6.

13. A network-side device comprising a processor, a memory, and a computer program stored on the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps in the link selection method according to claim 7.

14. A computer-readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, carries out the steps in the communication method according to any one of claims 1-6 or the steps in the link selection method according to claim 7.