CN105188099A - Relay device reselection method based on D2D communication - Google Patents
Relay device reselection method based on D2D communication Download PDFInfo
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- CN105188099A CN105188099A CN201510518908.6A CN201510518908A CN105188099A CN 105188099 A CN105188099 A CN 105188099A CN 201510518908 A CN201510518908 A CN 201510518908A CN 105188099 A CN105188099 A CN 105188099A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/26—Reselection being triggered by specific parameters by agreed or negotiated communication parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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Abstract
Embodiments of the invention provide a relay device reselection method based on D2D communication. The method comprises: a remote UE obtains channel quality and characteristic parameters of a current relay UE and the channel quality of a plurality of alternative relay UEs, wherein the characteristic parameters of the alternative relay UEs meet preset parameter conditions, and the current relay UE is a UE which is providing relay service to the remote UE at the moment; the remote UE uses the alternative relay UE having the highest channel quality among the plurality of alternative relay UEs as a target relay UE, when judging that the characteristic parameters of the current relay UE cannot meet preset characteristic parameters, and/or, when the channel quality of the target relay UE is higher than the channel quality of the current relay UE, the UE which is providing the relay service to the remote UE at the moment is reselected as the target relay UE. By adopting the method, the remote UE can obtain the transfer service with higher quality of service at any time, and thus the communication quality between the remote UE and a base station is improved.
Description
Technical field
The embodiment of the present invention relates to communication technical field, particularly relates to a kind of trunking reselecting method based on D2D communication.
Background technology
In mobile communications, in order to make the subscriber equipment (UserEquipment being in cell edge, UE) and the UE (the outlying UE of hereinafter referred) be in outside cellular cell can realize between base station good communication, select a UE as trunking in the UE of outlying UE in cellular cell, by the communication between the transfer realization of trunking and base station, wherein, realize communicating by terminal-to-terminal service (DevicetoDevice, D2D) technology between outlying UE and trunking.
Outlying UE is being undertaken in the process communicated by trunking and base station, when the position relationship of outlying UE and trunking changes or the characteristic parameter of trunking changes, the transfer service quality that trunking provides for outlying UE may decline, and then causes the poor communications quality between outlying UE and base station; But, in the prior art, when the transfer service quality that trunking provides for outlying UE is lower, trunking is still for this outlying UE provides relay services, until due to the reasons such as the electricity of trunking is lower trunking and outlying UE are disconnected time, outlying UE just gravity treatment selects other UE as trunking for it provides relay services.
As from the foregoing, in the prior art, undertaken in the process communicated at outlying UE by trunking and base station, trunking may be lower for the transfer service quality that outlying UE provides, and then causes the communication quality between outlying UE and base station lower.
Summary of the invention
The embodiment of the present invention provides a kind of trunking reselecting method based on D2D communication, in order to improve the communication quality between outlying UE and base station.
First aspect, the embodiment of the present invention provides a kind of trunking reselecting method based on D2D communication, comprising:
Outlying user equipment (UE) obtains the channel quality of the channel quality of current hop UE, characteristic parameter and multiple alternative relaying UE, wherein, the characteristic parameter of each described alternative relaying UE meets parameter preset condition, and described current hop UE is for for described outlying UE provides the UE of relay services;
Described outlying UE in described multiple alternative relaying UE, using alternative relaying UE the highest for channel quality as object relay UE;
Described outlying UE judges the channel quality that whether characteristic parameter of current hop UE meets described parameter preset condition, whether the channel quality of described object relay UE is greater than described current hop UE;
In judged result be: the characteristic parameter of described current hop UE does not meet described default characteristic parameter, and/or, when the channel quality of described object relay UE is greater than the channel quality of described current hop UE, described outlying UE provides the UE gravity treatment of relay services to be described object relay UE by current for described outlying UE.
Second aspect, the embodiment of the present invention provides a kind of trunking reselecting method based on D2D communication, comprising:
Alternative relaying UE receives the channel quality request message that outlying UE sends, and the characteristic parameter of described alternative relaying UE meets parameter preset condition, and the channel quality of described alternative relaying UE is greater than the channel quality of other alternative relaying UE;
Described alternative relaying UE obtains the channel quality of described alternative relaying UE, the channel quality of described alternative relaying UE is: described alternative relaying UE and the described outlying UE quality of channel for communicating, or, described alternative relaying UE and base station for the quality of channel that communicates and described alternative relaying UE and described outlying UE for the lower channel quality of channel quality in the quality of channel that communicates;
Described alternative relaying UE sends to described outlying UE the response message comprising channel quality, to make described outlying UE, described alternative relaying UE is defined as object relay UE, and make described outlying UE judge that the characteristic parameter of described current hop UE does not meet described default characteristic parameter, and/or, when the channel quality of described object relay UE is greater than the channel quality of described current hop UE, the UE gravity treatment of relay services is provided to be described object relay UE by current for described outlying UE.
The trunking reselecting method based on D2D communication that the embodiment of the present invention provides, outlying UE obtains the channel quality of the channel quality of current hop UE, characteristic parameter and multiple alternative relaying UE, and in multiple alternative relaying UE, using alternative relaying UE the highest for channel quality as object relay UE; Characteristic parameter is preset when judging that the characteristic parameter of current hop UE does not meet, and/or, when the channel quality of object relay UE is greater than the channel quality of current hop UE, outlying UE provides the UE gravity treatment of relay services to be object relay UE by current for outlying UE, make outlying UE at any time can obtain the higher transfer service of service quality, and then improve the communication quality between outlying UE and base station.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is embodiment of the present invention communication scenes schematic diagram;
Fig. 2 is trunking reselecting method embodiment one flow chart that the present invention is based on D2D communication;
Fig. 3 is trunking reselecting method embodiment two flow chart that the present invention is based on D2D communication;
Fig. 4 is trunking reselecting method embodiment three flow chart that the present invention is based on D2D communication;
Fig. 5 A is trunking reselecting method embodiment four flow chart that the present invention is based on D2D communication;
Fig. 5 B is trunking reselecting method embodiment five flow chart that the present invention is based on D2D communication;
Fig. 5 C is trunking reselecting method embodiment six flow chart that the present invention is based on D2D communication.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is embodiment of the present invention communication scenes schematic diagram, please refer to Fig. 1, in the coverage of base station 101, at least there is UE102, UE104, at least there is UE103 outward in the coverage of base station 101; In the process of communication, UE103 using UE102 as relaying UE, by the communication between the transfer realization of relaying UE102 and base station 101; In actual application, when the position of UE102 or UE103 changes or characteristic parameter changes, UE103 is made no longer to be suitably for UE102 when providing relay services, in order to ensure the communication quality between UE102 and base station, UE102 can select UE (such as UE104) as relaying UE in other UE of base station service.Adopt specific embodiment below, the flow process of the trunking reselecting method communicated based on D2D is described in detail.
Fig. 2 is trunking reselecting method embodiment one flow chart that the present invention is based on D2D communication; The executive agent of the method is arbitrary UE, this UE can pass through software and/or hardware implementing, in the present embodiment, according to the position relationship of UE, UE is divided, in the present embodiment, the technical program for convenience of description, the executive agent UE of the present embodiment is called outlying UE, please refer to Fig. 2, the method can comprise:
S201, outlying UE obtain the channel quality of the channel quality of current hop UE, characteristic parameter and multiple alternative relaying UE, wherein, the characteristic parameter of each alternative relaying UE meets parameter preset condition, and current hop UE is for for outlying UE provides the UE of relay services;
S202, outlying UE in multiple alternative relaying UE, using alternative relaying UE the highest for channel quality as object relay UE;
S203, outlying UE judge the channel quality that whether characteristic parameter of current hop UE meets parameter preset condition, whether the channel quality of object relay UE is greater than current hop UE;
S204, in judged result be: the characteristic parameter of current hop UE does not meet presets characteristic parameter, and/or, when the channel quality of object relay UE is greater than the channel quality of current hop UE, outlying UE provides the UE gravity treatment of relay services to be object relay UE by current for outlying UE.
In the embodiment shown in Figure 2, optionally, the channel quality of UE (current hop UE or alternative relaying UE) can comprise: Reference Signal Received Power (ReferenceSignalReceivingPower, RSRP), and/or receive Reference Signal Received Quality (ReferenceSignalReceivingQuality, RSRQ), accordingly, preset quality requires: between UE and base station, the RSRP of signal transmission meets default received power requirement, and/or between UE and base station, the RSRQ of signal transmission meets the requirement of preset reference signal receiving quality; Optionally, the characteristic parameter of UE can comprise dump energy and translational speed, accordingly, the parameter preset condition that the characteristic parameter of UE meets can comprise: the translational speed of condition and UE that dump energy is greater than default charge value is less than the condition of the default translational speed of UE, further, the characteristic parameter of UE can also comprise the energy consumption index of UE, and accordingly, the condition that the characteristic parameter of UE meets also comprises: the energy consumption index of UE meets the condition of default horsepower requirements.
In the embodiment shown in Figure 2, optionally, the channel quality of current hop UE can be: current hop UE and the outlying UE quality of channel for communicating, or, current hop UE and base station for the quality of channel that communicates and current hop UE and outlying UE for the lower channel quality of channel quality in the quality of channel that communicates; Optionally, the channel quality of alternative relaying UE can be: alternative relaying UE and the outlying UE quality of channel for communicating, or, alternative relaying UE and base station for the quality of channel that communicates and alternative relaying UE and outlying UE for the lower channel quality of channel quality in the quality of channel that communicates.
Optionally, outlying UE can obtain the channel quality of current hop UE and alternative relaying UE by implementation possible as follows:
Feasible implementation: outlying UE to current hop UE and an alternative relaying UE transmitting channel quality request message, with the channel quality of acquisition request current hop UE and alternative relaying UE; Preferably, outlying UE can periodically to current hop UE and alternative relaying UE transmitting channel quality request message.
Another kind of feasible implementation: current hop UE and alternative relaying UE initiatively sends its channel quality to outlying UE; Preferably, current hop UE and alternative relaying UE periodically can send its channel quality to outlying UE.
Optionally, outlying UE can obtain the characteristic parameter of current hop UE by implementation possible as follows:
Feasible implementation: outlying UE sends a characteristic parameter request message, with the characteristic parameter of acquisition request current hop UE to current hop UE; Preferably, outlying UE periodically sends characteristic parameter request message to current hop UE.
Another kind of feasible implementation: current hop UE initiatively sends its characteristic parameter to outlying UE; Preferably, current hop UE periodically sends its characteristic parameter to outlying UE.
In actual use, obtain the channel quality of multiple alternative relaying UE at outlying UE before, need to determine multiple alternative relaying UE in the UE of base station service, concrete: outlying UE obtains the characteristic parameter of the UE of base station service; The characteristic parameter of the UE that outlying UE serves according to base station, in the UE serve base station, characteristic parameter meets the UE of parameter preset condition as alternative relaying UE; Wherein, along with the characteristic parameter of UE changes, outlying UE can upgrade in real time or periodically and determine alternative relaying UE.
After determining to obtain alternative relaying UE, in order to ensure that outlying UE is by the transfer realization of relaying UE and the communication quality communicated between base station, outlying UE needs real-time or periodic in alternative relaying UE, acquisition can substitute the object relay UE of current hop UE, concrete: outlying UE obtains the channel quality of multiple alternative relaying UE, and the UE that selective channel quality is the highest in alternative relaying UE is as object relay UE.
After outlying UE obtains object relay UE, outlying UE obtains channel quality and the characteristic parameter of current hop UE, and judges the channel quality that whether characteristic parameter of current hop UE meets parameter preset condition, whether the channel quality of object relay UE is greater than current hop UE; If result of determination is: the characteristic parameter of current hop UE does not meet presets characteristic parameter, and/or when the channel quality of object relay UE is greater than the channel quality of current hop UE, outlying UE reselects the relaying UE of object relay UE as outlying UE.
In above-mentioned implementation procedure, carry out in the process that communicate by current hop UE with base station at outlying UE, outlying UE real-time or periodically in base station service, characteristic parameter meets in the alternative relaying UE of parameter preset condition, determine that the highest UE of channel quality is object relay UE, relaying UE (characteristic parameter of current hop UE does not meet parameter preset condition) is no longer suitable as at current hop UE, and/or when there is the higher UE of channel quality (channel quality of object relay UE is greater than the channel quality of current hop UE) in alternative relaying UE, outlying UE reselects the relaying UE of object relay UE as outlying UE, make outlying UE at any time can obtain the higher transfer service of service quality, and then the communication quality that improve between outlying UE and base station.
The trunking reselecting method based on D2D communication that the embodiment of the present invention provides, outlying UE obtains the channel quality of the channel quality of current hop UE, characteristic parameter and multiple alternative relaying UE, and in multiple alternative relaying UE, using alternative relaying UE the highest for channel quality as object relay UE; Preset characteristic parameter when the characteristic parameter judging current hop UE does not meet, and/or when the channel quality of object relay UE is greater than the channel quality of current hop UE, outlying UE provides the UE gravity treatment of relay services to be object relay UE by current for outlying UE; By said method, make outlying UE at any time can obtain the higher transfer service of service quality, and then improve the communication quality between outlying UE and base station.
In the process that reality uses, outlying UE can perform in real time or periodically embodiment illustrated in fig. 2 in S201-S204, further, in order to reduce the energy consumption of outlying UE, the channel quality of current hop UE is obtained at outlying UE, before the channel quality of characteristic parameter and multiple alternative relaying UE, outlying UE can first judge whether to need to perform S201-S204 according to conditions present (characteristic parameter of current hop UE or the channel quality etc. of current hop UE), optionally, outlying UE can judge whether to need to perform S201-S204 by following feasible implementation,
Feasible implementation: outlying UE receives the denial of service message that current hop UE sends, denial of service message is used to indicate current hop UE and cannot continues as outlying UE and provide relay services.
In this kind of implementation, when outlying UE receives the denial of service message of current hop UE transmission, show current hop UE due to unique characteristics parameter reason (such as, electricity is less than default power threshold), and this outlying UE cannot be continued as relay services is provided, in that case, outlying UE is by starting trunking reselecting method (performing S201-S204), parameter preset condition is met to obtain characteristic parameter, and the good object relay UE of channel quality, and by object relay UE replacement current hop UE for outlying UE provides relay services, avoid the phenomenon of the communication quality difference between outlying UE because current hop UE causes because characteristic parameter does not meet parameter preset condition and base station, make currently to provide the UE of relay services all can provide service quality good transfer service for outlying UE at any time for outlying UE, and then the communication quality improved between outlying UE and base station.
Another kind of feasible implementation:
Fig. 3 is trunking reselecting method embodiment two flow chart that the present invention is based on D2D communication, and please refer to Fig. 3, the method can comprise:
S301, outlying UE obtain the current hop UE channel quality at the first moment and current time, and the first moment was the predetermined time before current time;
S302, outlying UE judge that whether the channel quality of current hop UE at current time be lower than the channel quality in the first moment;
If so, then perform S303, if not, flow process terminates;
S303, outlying UE judge whether the channel quality of current UE in the first moment is greater than predetermined threshold value with the difference of the channel quality at current time;
If so, then perform S304, if not, flow process terminates;
S304, outlying UE obtain the channel quality of the channel quality of current hop UE, characteristic parameter and multiple alternative relaying UE, wherein, the characteristic parameter of each alternative relaying UE meets parameter preset condition, and current hop UE is for for outlying UE provides the UE of relay services.
It should be noted that, S304 with S201 is identical, and after execution S304, the S202-S204 in also needing execution embodiment illustrated in fig. 2, no longer repeats herein.
In the embodiment shown in fig. 3, optionally, the first moment can be the predetermined time before current time, such as, the first moment be current time before moment before 10 minutes; In actual application, can set the relation of the first moment and current time and the size of predetermined threshold value according to actual needs, the present invention is not specifically limited this.
In the process that reality uses, outlying UE is by judging that whether the channel quality of current hop UE is in decline, when judging that the channel quality obtaining current hop UE is in decline, and fall is when being greater than predetermined threshold value, outlying UE starts trunking reselecting method (performing S201-S204), parameter preset condition is met to obtain characteristic parameter, and the good object relay UE of channel quality, and by object relay UE replacement current hop UE for outlying UE provides relay services, avoid the phenomenon of the communication quality difference between outlying UE and base station caused due to current hop UE bad channel quality, make currently to provide the UE of relay services all can provide service quality good transfer service for outlying UE at any time for outlying UE, and then the communication quality improved between outlying UE and base station.
It will be understood by those skilled in the art that, in the embodiment shown in fig. 3, outlying UE judges whether to start trunking gravity treatment (performing S201-S204) at current time and the channel quality in the first moment according to current hop UE, can also judge whether to start trunking gravity treatment (performing S201-S204) according to the channel quality of the multiple predetermined time of current hop before current time and current time.
In above-mentioned any embodiment, outlying UE can by following feasible implementation, provides the UE gravity treatment of relay services to be object relay UE by current for outlying UE.
Feasible implementation: outlying UE sends a service request information to object relay UE, obtains mandate object relay UE that base station sends for outlying UE and provides the authorization response message of relay services to make object relay UE; What outlying UE receiving target relaying UE sent be used to indicate object relay UE provides the service response message of relay services for outlying UE.
Outlying UE sends to current hop UE and stops service request information, obtains termination mandate current hop UE that base station sends for outlying UE provide the termination authorization response message of relay services to make current hop UE; The current hop UE that is used to indicate that outlying UE receives current hop UE transmission terminates as the termination service response message that outlying UE provides relay services.
In this kind of implementation, first outlying UE makes object relay UE provide relay services for it, and then makes current hop UE stop providing relay services for it, this ensure that the communication between outlying UE and base station there will not be interruption.
Another kind of feasible implementation: outlying UE sends to current hop UE and stops service request information, obtains termination mandate current hop UE that base station sends for outlying UE and provides the termination authorization response message of relay services to make current hop UE; The current hop UE that is used to indicate that outlying UE receives current hop UE transmission terminates as the termination service response message that outlying UE provides relay services.
Outlying UE sends service request information to object relay UE, obtains mandate object relay UE that base station sends for outlying UE provide the authorization response message of relay services to make object relay UE; What outlying UE receiving target relaying UE sent be used to indicate object relay UE provides the service response message of relay services for outlying UE.
In this kind of implementation, first outlying UE makes current hop UE stop providing relay services for it, and then make object relay UE provide relay services for it, this avoid because two relaying UE are simultaneously for outlying UE provides relay services, and the wasting of resources caused.
Fig. 4 is trunking reselecting method embodiment three flow chart that the present invention is based on D2D communication, the executive agent of the method is arbitrary UE, this UE can pass through software and/or hardware implementing, in the present embodiment, according to the position relationship of UE, UE is divided, in the present embodiment, the technical program for convenience of description, is called alternative relaying UE by the executive agent UE of the present embodiment, please refer to Fig. 4, the method can comprise:
S401, alternative relaying UE receive the channel quality request message that outlying UE sends, and the characteristic parameter of alternative relaying UE meets parameter preset condition, and the channel quality of alternative relaying UE is greater than the channel quality of other alternative relaying UE;
S402, alternative relaying UE obtain the channel quality of alternative relaying UE;
Wherein, the channel quality of alternative relaying UE is: alternative relaying UE and the outlying UE quality of channel for communicating, or, alternative relaying UE and base station for the quality of channel that communicates and alternative relaying UE and outlying UE for the lower channel quality of channel quality in the quality of channel that communicates;
S403, alternative relaying UE send the response message comprising channel quality to outlying UE, to make outlying UE, alternative relaying UE is defined as object relay UE, and make outlying UE judge that the characteristic parameter of current hop UE does not meet default characteristic parameter, and/or, when the channel quality of object relay UE is greater than the channel quality of current hop UE, the UE gravity treatment of relay services is provided to be object relay UE by current for outlying UE.
The channel quality of the embodiment shown in Fig. 4, characteristic parameter and parameter preset condition, identical with channel quality, characteristic parameter and parameter preset condition in embodiment illustrated in fig. 2, no longer repeat herein.
In the process that reality uses, for any one alternative relaying UE, after alternative relaying UE receives the channel quality request message of outlying UE transmission, alternative relaying UE obtains its channel quality, and send its channel quality to base station, the alternative relaying UE that can determine in multiple alternative relaying UE that channel quality is the highest to make outlying UE is for object relay UE, and then make outlying UE judging that the characteristic parameter of current hop UE does not meet characteristic parameter, and/or, when the channel quality of object relay UE is greater than the channel quality of current hop UE, reselect the relaying UE of object relay UE as outlying UE, make outlying UE at any time can obtain the higher transfer service of service quality, and then the communication quality that improve between outlying UE and base station.
It will be understood by those skilled in the art that, alternative relaying UE can when receiving the channel quality request message that base station sends, obtain and send alternative relaying UE channel quality to base station, also can initiatively, periodically send its channel quality to base station, the present invention does not do concrete restriction to this.
The trunking reselecting method based on D2D communication that the embodiment of the present invention provides, alternative relaying UE is after the channel quality request message receiving outlying UE transmission, obtain and send its channel quality to outlying UE, the alternative relaying UE that can determine in multiple alternative relaying UE that channel quality is the highest to make outlying UE is for object relay UE, and current hop UE be no longer suitably for outlying UE relay services is provided time, current hop UE is replaced with object relay UE, relay services is provided for it to make object relay UE, make outlying UE at any time can obtain the higher transfer service of service quality, and then the communication quality that improve between outlying UE and base station.
In actual application, by performing following three processes, outlying UE can be realized and determines trunking.
Process one: determine alternative relaying UE in the UE that outlying UE serves in base station.
Process two: outlying UE determines whether to need to carry out relaying UE gravity treatment.
Process three: outlying UE provides the UE gravity treatment of relay services to be object relay UE by current for outlying UE.
Below, be described in detail for above-mentioned three processes respectively.
Process one:
Fig. 5 A is trunking reselecting method embodiment four flow chart that the present invention is based on D2D communication, and please refer to Fig. 5, the method can comprise:
The UE that S501, outlying UE serve to base station sends characteristic parameter request message;
Corresponding, the UE of base station service receives the characteristic parameter request message of outlying UE transmission, and characteristic parameter request message is for asking the characteristic parameter of alternative relaying UE;
The UE of S502, base station service sends the response message comprising characteristic parameter to outlying UE;
The characteristic parameter of the UE that S503, outlying UE serve according to base station, in the UE serve base station, characteristic parameter meets the UE of parameter preset condition as alternative relaying UE;
S504, outlying UE are to alternative relaying UE transmitting channel quality request message;
Corresponding, alternative relaying UE receives the channel quality request message that outlying UE sends;
S505, alternative relaying UE obtain the channel quality of alternative relaying UE;
Wherein, the channel quality of alternative relaying UE is: alternative relaying UE and the outlying UE quality of channel for communicating, or, alternative relaying UE and base station for the quality of channel that communicates and alternative relaying UE and outlying UE for the lower channel quality of channel quality in the quality of channel that communicates;
S506, alternative relaying UE send the response message comprising channel quality to outlying UE;
S507, outlying UE in multiple alternative relaying UE, using alternative relaying UE the highest for channel quality as object relay UE.
Process two:
Fig. 5 B is trunking reselecting method embodiment five flow chart that the present invention is based on D2D communication, and on the basis of Fig. 5 A illustrated embodiment, please refer to Fig. 5 B, the method can comprise:
S508, outlying UE are to current hop UE transmitting channel quality request message;
S509, current hop UE send the response message comprising the channel quality of current hop UE to outlying UE;
S510, outlying UE send characteristic parameter request message to current hop UE;
S511, current hop UE send the response message comprising the characteristic parameter of current hop UE to outlying UE;
S512, outlying UE judge whether the characteristic parameter of current hop UE meets parameter preset condition;
If so, then perform S513, if not, then perform S514;
S513, outlying UE judge whether the channel quality of object relay UE is greater than the channel quality of current hop UE;
If so, then perform S514, if not, then perform S512;
S514, outlying UE determine to provide the UE gravity treatment of relay services to be object relay UE by current for outlying UE.
It should be noted that do not have sequential relationship between S506-S507 and S508-S509, S506-S507 and S508-S509 can sequentially perform, and also can perform simultaneously; There is no sequential relationship between S512 and S513, first can perform S512, first can perform S513 yet.
Process three:
Fig. 5 C is trunking reselecting method embodiment six flow chart that the present invention is based on D2D communication, and on the basis of Fig. 5 A and Fig. 5 B illustrated embodiment, please refer to Fig. 5 C, the method can comprise:
S515, outlying UE send service request information to object relay UE;
S516, object relay UE send authorization request message according to service request information to base station;
Wherein, authorization request message comprises the mark of outlying UE, and request base station authorizes object relay UE to provide relay services for outlying UE;
S517, base station send authorization response message to object relay UE;
S518, object relay UE send service response message to outlying UE;
Wherein, service response message is used to indicate object relay UE for outlying UE provides relay services;
S519, outlying UE send to current hop UE and stop service request information;
S520, current hop UE send termination authorization request message according to termination service request information to base station;
Wherein, stop authorization request message and comprise the mark of outlying UE, request base-station ceases mandate current hop UE provides relay services for outlying UE;
S521, base station send to current hop UE and stop authorization response message;
S522, current hop UE send to outlying UE and stop service response message;
Wherein, stop service response message to be used to indicate current hop UE and to terminate as outlying UE relay services is provided.
It should be noted that there is no sequential relationship between S515-S518 and S519-S522, first can perform S515-S518, also first can perform S519-S522.
It will be appreciated by persons skilled in the art that when performing above-mentioned three processes first, said process one, process two, process three needs order performs, and in middle implementation, above-mentioned three processes can individually perform.
One of ordinary skill in the art will appreciate that: all or part of step realizing above-mentioned each embodiment of the method can have been come by the hardware that program command is relevant.Aforesaid program can be stored in a computer read/write memory medium.This program, when performing, performs the step comprising above-mentioned each embodiment of the method; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1., based on a trunking reselecting method for D2D communication, it is characterized in that, comprising:
Outlying user equipment (UE) obtains the channel quality of the channel quality of current hop UE, characteristic parameter and multiple alternative relaying UE, wherein, the characteristic parameter of each described alternative relaying UE meets parameter preset condition, and described current hop UE is for for described outlying UE provides the UE of relay services;
Described outlying UE in described multiple alternative relaying UE, using alternative relaying UE the highest for channel quality as object relay UE;
Described outlying UE judges the channel quality that whether characteristic parameter of current hop UE meets described parameter preset condition, whether the channel quality of described object relay UE is greater than described current hop UE;
In judged result be: the characteristic parameter of described current hop UE does not meet described default characteristic parameter, and/or, when the channel quality of described object relay UE is greater than the channel quality of described current hop UE, described outlying UE provides the UE gravity treatment of relay services to be described object relay UE by current for described outlying UE.
2. method according to claim 1, is characterized in that, before described outlying UE obtains the channel quality of multiple alternative relaying UE, also comprises:
Described outlying UE obtains the characteristic parameter of the UE of base station service;
The characteristic parameter of the UE that described outlying UE serves according to described base station, in the UE serve described base station, characteristic parameter meets the UE of described parameter preset condition as alternative relaying UE;
Described outlying UE obtains the channel quality of multiple alternative relaying UE, comprising:
Described outlying UE to each described alternative relaying UE transmitting channel quality request message, and receives the response message comprising channel quality of each described alternative relaying UE transmission.
3. method according to claim 1, is characterized in that, described outlying UE provides the UE gravity treatment of relay services to be described object relay UE by current for described outlying UE, comprising:
Described outlying UE sends service request information to described object relay UE, obtains mandate described object relay UE that described base station sends for described outlying UE provide the authorization response message of relay services to make described object relay UE;
What described outlying UE received that described object relay UE sends be used to indicate described object relay UE provides the service response message of relay services for described outlying UE;
Described outlying UE sends to described current hop UE and stops service request information, obtains termination that described base station sends authorize described current hop UE to provide the termination authorization response message of relay services for described outlying UE to make described current hop UE;
The described current hop UE that is used to indicate that described outlying UE receives described current hop UE transmission terminates as the termination service response message that described outlying UE provides relay services.
4. method according to claim 1, is characterized in that, before obtaining the channel quality of the channel quality of current hop UE, characteristic parameter and multiple alternative relaying UE, also comprises at described outlying user equipment (UE):
Described outlying UE obtains the channel quality of described current hop UE at the first moment and current time, and described first moment is the predetermined time before described current time;
Described outlying UE judges that the channel quality of described current hop UE at described current time is lower than the channel quality in described first moment, and described first moment channel quality be greater than predetermined threshold value in the difference of the channel quality of described current time.
5. method according to claim 1, is characterized in that, before obtaining the channel quality of the channel quality of current hop UE, characteristic parameter and multiple alternative relaying UE, also comprises at described outlying user equipment (UE):
Receive the denial of service message that current hop UE sends, described denial of service message is used to indicate described current hop UE and cannot continues as described outlying UE and provide relay services.
6. method according to claim 1, is characterized in that, described characteristic parameter comprises dump energy and translational speed;
Described parameter preset condition comprises: the translational speed of condition and UE that dump energy is greater than default charge value is less than the condition of the default translational speed of UE.
7. the method according to any one of claim 1-6, is characterized in that,
The channel quality of current hop UE is: current hop UE and the described outlying UE quality of channel for communicating, or, described current hop UE and base station for the quality of channel that communicates and described current hop UE and described outlying UE for the lower channel quality of channel quality in the quality of channel that communicates;
The channel quality of alternative relaying UE is: described alternative relaying UE and the described outlying UE quality of channel for communicating, or, described alternative relaying UE and base station for the quality of channel that communicates and described alternative relaying UE and described outlying UE for the lower channel quality of channel quality in the quality of channel that communicates.
8., based on a trunking reselecting method for D2D communication, it is characterized in that, comprising:
Alternative relaying UE receives the channel quality request message that outlying UE sends, and the characteristic parameter of described alternative relaying UE meets parameter preset condition, and the channel quality of described alternative relaying UE is greater than the channel quality of other alternative relaying UE;
Described alternative relaying UE obtains the channel quality of described alternative relaying UE, the channel quality of described alternative relaying UE is: described alternative relaying UE and the described outlying UE quality of channel for communicating, or, described alternative relaying UE and base station for the quality of channel that communicates and described alternative relaying UE and described outlying UE for the lower channel quality of channel quality in the quality of channel that communicates;
Described alternative relaying UE sends to described outlying UE the response message comprising channel quality, to make described outlying UE, described alternative relaying UE is defined as object relay UE, and make described outlying UE judge that the characteristic parameter of described current hop UE does not meet described default characteristic parameter, and/or, when the channel quality of described object relay UE is greater than the channel quality of described current hop UE, the UE gravity treatment of relay services is provided to be described object relay UE by current for described outlying UE.
9. method according to claim 8, is characterized in that, after described alternative relaying UE to send to described outlying UE and comprises the response message of channel quality, also comprises:
Described alternative relaying UE receives the service request information that described outlying UE sends, and described service request information provides relay services for asking described alternative relaying UE for described outlying UE;
Described alternative relaying UE sends the authorization request message comprising described outlying UE mark to base station, and receives the authorization response message that base station sends, and the described alternative relaying UE of described authorization response message instruction provides outlying service for described outlying UE;
Described alternative relaying UE sends to described outlying UE and is used to indicate described alternative relaying UE for described outlying UE and provides the service response message of relay services.
10. method according to claim 8 or claim 9, is characterized in that, described alternative relaying UE also comprises before receiving the channel quality request message that outlying UE sends:
Described alternative relaying UE receives the characteristic parameter request message that outlying UE sends, and described characteristic parameter request message is for asking the characteristic parameter of described alternative relaying UE;
Described alternative relaying UE sends to described outlying UE the response message comprising characteristic parameter.
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