CN105188099B - Trunking reselecting method based on D2D communication - Google Patents
Trunking reselecting method based on D2D communication Download PDFInfo
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- CN105188099B CN105188099B CN201510518908.6A CN201510518908A CN105188099B CN 105188099 B CN105188099 B CN 105188099B CN 201510518908 A CN201510518908 A CN 201510518908A CN 105188099 B CN105188099 B CN 105188099B
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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
The embodiment of the present invention provides a kind of trunking reselecting method based on D2D communication.This method comprises: outlying UE obtains the channel quality, characteristic parameter and multiple alternative channel qualities for relaying UE of current hop UE, wherein, the characteristic parameter of each alternative relaying UE meets parameter preset condition, and current hop UE is provides the UE of relay services for outlying UE；Outlying UE is in multiple alternative relaying UE, using the highest alternative relaying UE of channel quality as object relay UE, when the characteristic parameter for judging current hop UE is unsatisfactory for default characteristic parameter, and/or, it will for the outlying UE UE gravity treatment for providing relay services be currently object relay UE when the channel quality of object relay UE is greater than the channel quality of current hop UE.By the above method, so that the outlying UE higher transfer service of available service quality at any time, and then improve the communication quality between outlying UE and base station.
Description
Technical field
The present embodiments relate to field of communication technology more particularly to a kind of trunking gravity treatment sides based on D2D communication
Method.
Background technique
In mobile communications, in order to enable in cell edge user equipment (User Equipment, UE) with
And the good communication between base station may be implemented in the UE (the outlying UE of hereinafter referred) except cellular cell, outlying UE is in bee
Select a UE as trunking in UE in nest cell, by the communication between the transfer realization of trunking and base station,
Wherein, communication is realized by terminal-to-terminal service (Device to Device, D2D) technology between outlying UE and trunking.
Outlying UE by trunking and base station during being communicated, when the position of outlying UE and trunking is closed
When system changes or the characteristic parameter of trunking changes, trunking is the transfer service quality that outlying UE is provided
It may decline, and then lead to the poor communications quality between outlying UE and base station；However, in the prior art, when relaying is set
When lower for the transfer service quality provided for outlying UE, trunking remains as the outlying UE and provides relay services, until by
When the more low reason of the electricity of trunking disconnects trunking and outlying UE, outlying UE ability gravity treatment selects other
UE provide relay services as trunking for it.
From the foregoing, it will be observed that in the prior art, during outlying UE is communicated by trunking and base station, relaying
Equipment is that the transfer service quality that outlying UE is provided may be lower, so cause communication quality between outlying UE and base station compared with
It is low.
Summary of the invention
The embodiment of the present invention provides a kind of trunking reselecting method based on D2D communication, to improve outlying UE and base
Communication quality between standing.
In a 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, characteristic parameter and multiple alternative letters for relaying UE of current hop UE
Road quality, wherein the characteristic parameter of each alternative relaying UE meets parameter preset condition, and the current hop UE is being
The outlying UE provides the UE of relay services；
The outlying UE is in the multiple alternative relaying UE, using the highest alternative relaying UE of channel quality as in target
After UE；
The outlying UE judges whether the characteristic parameter of current hop UE meets the parameter preset condition, in the target
Whether the channel quality after UE is greater than the channel quality of the current hop UE；
In judging result are as follows: the characteristic parameter of the current hop UE is unsatisfactory for the default characteristic parameter, and/or, institute
When stating channel quality of the channel quality of object relay UE greater than the current hop UE, the outlying UE will currently be the side
The UE gravity treatment that remote UE provides relay services is the object relay UE.
Second aspect, the embodiment of the present invention provide a kind of trunking reselecting method based on D2D communication, comprising:
Alternative relaying UE receives the channel quality request message that outlying UE is sent, and the characteristic parameter of the alternative relaying UE is full
Sufficient parameter preset condition, and the channel quality of the alternative relaying UE is greater than the channel quality of other alternative relaying UE；
The alternative relaying UE obtains the channel quality of the alternative relaying UE, the channel quality of the alternative relaying UE
Are as follows: the quality of the alternative relaying UE and the outlying UE channel for being used to communicate, alternatively, the alternative relaying UE and base station are used
The channel quality in the quality and the alternative quality for relaying UE and the outlying UE for the channel communicated of the channel of communication
Lower channel quality；
The alternative relaying UE sends the response message including channel quality to the outlying UE, so that the outlying UE will
The alternative relaying UE is determined as object relay UE, and makes the outlying UE in the characteristic parameter for judging the current hop UE
It is unsatisfactory for the default characteristic parameter, and/or, the channel quality of the object relay UE is greater than the channel of the current hop UE
It will for the outlying UE UE gravity treatment for providing relay services be currently the object relay UE when quality.
Trunking reselecting method provided in an embodiment of the present invention based on D2D communication, outlying UE obtain current hop UE
Channel quality, characteristic parameter and multiple alternative relaying UE channel quality, and in multiple alternative relaying UE, by channel matter
Highest alternative relaying UE is measured as object relay UE；When the characteristic parameter for judging current hop UE is unsatisfactory for default feature ginseng
Number, and/or, when the channel quality of object relay UE is greater than the channel quality of current hop UE, outlying UE will currently be outlying UE
The UE gravity treatment for providing relay services is object relay UE, so that can to obtain service quality at any time higher by outlying UE
Transfer service, and then improve the communication quality between outlying UE and base station.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is communication scenes of embodiment of the present invention schematic diagram；
Fig. 2 is that the present invention is based on one flow charts of trunking reselecting method embodiment that D2D is communicated；
Fig. 3 is that the present invention is based on two flow charts of trunking reselecting method embodiment that D2D is communicated；
Fig. 4 is that the present invention is based on three flow charts of trunking reselecting method embodiment that D2D is communicated；
Fig. 5 A is that the present invention is based on the trunking reselecting method example IV flow charts that D2D is communicated；
Fig. 5 B is that the present invention is based on five flow charts of trunking reselecting method embodiment that D2D is communicated；
Fig. 5 C is that the present invention is based on six flow charts of trunking reselecting method embodiment that D2D is communicated.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Fig. 1 is communication scenes of embodiment of the present invention schematic diagram, please refers to Fig. 1, at least deposits in the coverage area of base station 101
In UE 102, UE 104, at least there is UE 103 outside the coverage area of base station 101；During communication, UE 103 is by UE
102 as relaying UE, the communication between transfer realization and base station 101 by relaying UE 102；In actual application, when
The position of UE102 or UE103 changes or characteristic parameter changes, so that UE103 is no longer appropriate for providing for UE102
When relay services, in order to guarantee that the communication quality between UE 102 and base station, UE102 can select in other UE that base station services
UE (such as UE 104) is selected as relaying UE.Specific embodiment is used below, to the trunking gravity treatment side communicated based on D2D
The process of method is described in detail.
Fig. 2 is that the present invention is based on one flow charts of trunking reselecting method embodiment that D2D is communicated；The execution master of this method
Body is arbitrary UE, which can be by software and or hardware realization, in the present embodiment, according to the positional relationship of UE, to UE
It is divided, in the present embodiment, the technical program, referred to as outlying by the executing subject UE of the present embodiment for ease of description
UE, referring to figure 2., this method may include:
S201, outlying UE obtain the channel quality, characteristic parameter and multiple alternative channels for relaying UE of current hop UE
Quality, wherein the characteristic parameter of each alternative relaying UE meets parameter preset condition, and current hop UE is provides for outlying UE
The UE of relay services；
S202, outlying UE are in multiple alternative relaying UE, using the highest alternative relaying UE of channel quality as object relay
UE；
S203, outlying UE judge whether the characteristic parameter of current hop UE meets parameter preset condition, object relay UE
Whether channel quality is greater than the channel quality of current hop UE；
S204, in judging result are as follows: the characteristic parameter of current hop UE is unsatisfactory for default characteristic parameter, and/or, in target
When the channel quality of UE is greater than the channel quality of current hop UE, outlying UE currently will provide the UE of relay services for outlying UE
Gravity treatment is object relay UE.
In the embodiment shown in Figure 2, optionally, the channel quality of UE (current hop UE or alternatively relaying UE) can wrap
It includes: Reference Signal Received Power (Reference Signal Receiving Power, RSRP), and/or receive reference signal
The quality of reception (Reference Signal Receiving Quality, RSRQ), correspondingly, require can be with for preset quality are as follows:
The RSRP that signal is transmitted between UE and base station meets default receive and transmits signal between power requirement and/or UE and base station
RSRQ meets preset reference signal receiving quality requirement；Optionally, the characteristic parameter of UE may include remaining capacity and mobile speed
Degree, correspondingly, the parameter preset condition that the characteristic parameter of UE meets may include: the condition that remaining capacity is greater than default charge value
And the condition of default movement speed of the movement speed of UE less than UE, further, the characteristic parameter of UE can also include UE
Energy consumption index, correspondingly, the condition that the characteristic parameter of UE meets further include: the energy consumption index of UE meets default horsepower requirements
Condition.
In the embodiment shown in Figure 2, optionally, the channel quality of current hop UE can be with are as follows: current hop UE and side
The quality of channel of the remote UE for communication, alternatively, the quality and current hop of channel of the current hop UE with base station for communicating
UE is with outlying UE for the lower channel quality of channel quality in the quality of the channel communicated；Optionally, the letter of UE is alternatively relayed
Road quality can be with are as follows: the quality of alternative relaying UE and the outlying UE channel for being used to communicate, alternatively, the alternative UE that relays is used for base station
The quality of the channel of communication and alternative UE and the outlying UE of relaying are for the lower channel of channel quality in the quality of the channel communicated
Quality.
Optionally, outlying UE can obtain the letter of current hop UE and alternative relaying UE by following possible implementation
Road quality:
A kind of feasible implementation: outlying UE sends channel quality request and disappears to current hop UE and alternative relaying UE
Breath, with the channel quality of request current hop UE and alternative relaying UE；Preferably, outlying UE can be periodically to current
It relays UE and alternative relaying UE sends channel quality request message.
Another feasible implementation: current hop UE and alternative relaying UE actively send its channel matter to outlying UE
Amount；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 following possible implementation:
A kind of feasible implementation: outlying UE sends characteristic parameter request message to current hop UE, with request
The characteristic parameter of current hop UE；Preferably, outlying UE periodically sends characteristic parameter request message to current hop UE.
Another feasible implementation: current hop UE actively sends its characteristic parameter to outlying UE；Preferably, currently
Relaying UE periodically sends its characteristic parameter to outlying UE.
In actual use, it before the channel quality that outlying UE obtains multiple alternative relaying UE, needs in base station
Multiple alternative relaying UE are determined in the UE of service, specific: outlying UE obtains the characteristic parameter of the UE of base station service；Outlying UE root
According to the characteristic parameter of the UE of base station service, characteristic parameter in the UE of base station service is met into the UE of parameter preset condition alternately
Relay UE；Wherein, as the characteristic parameter of UE changes, outlying UE, which can in real time or periodically update, determines alternative relaying
UE。
After determination obtains alternatively relaying UE, in order to guarantee to lead between transfer realization and base station of the outlying UE by relaying UE
The communication quality of letter, outlying UE need in real time or periodically in alternatively relaying UE, and acquisition can substitute current hop UE's
Object relay UE, specific: outlying UE obtains the channel quality of multiple alternative relaying UE, and selects channel in alternatively relaying UE
The highest UE of quality is as object relay UE.
After outlying UE obtains object relay UE, outlying UE obtains the channel quality and characteristic parameter of current hop UE,
And judges whether the characteristic parameter of current hop UE meets parameter preset condition, whether the channel quality of object relay UE is greater than and work as
The channel quality of preceding relaying UE；If it is determined that result are as follows: the characteristic parameter of current hop UE is unsatisfactory for default 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 object relay UE as side
The relaying UE of remote UE.
During above-mentioned realization, during outlying UE is communicated by current hop UE with base station, outlying UE
In real time or periodically in base station service, alternative relaying UE that characteristic parameter meets parameter preset condition, channel is determined
Quality highest UE is object relay UE, and being not suitable anymore for as relaying UE in current hop UE, (characteristic parameter of current hop UE is not
Meet parameter preset condition), and/or there are the higher UE of channel quality (the channel matter of object relay UE in alternatively relaying UE
Amount is greater than the channel quality of current hop UE) when, outlying UE reselects relaying UE of the object relay UE as outlying UE, so that
Outlying UE can obtain the higher transfer service of service quality at any time, and then improve between outlying UE and base station
Communication quality.
Trunking reselecting method provided in an embodiment of the present invention based on D2D communication, outlying UE obtain current hop UE
Channel quality, characteristic parameter and multiple alternative relaying UE channel quality, and in multiple alternative relaying UE, by channel matter
Highest alternative relaying UE is measured as object relay UE；When the characteristic parameter for judging current hop UE is unsatisfactory for default feature ginseng
Number, and/or, when the channel quality of object relay UE is greater than the channel quality of current hop UE, outlying UE will currently be outlying UE
The UE gravity treatment for providing relay services is object relay UE；By the above method, so that outlying UE is available at any time
The higher transfer service of service quality, and then improve the communication quality between outlying UE and base station.
During actual use, outlying UE can in real time or periodically execute the S201- in embodiment illustrated in fig. 2
S204 further in order to reduce the energy consumption of outlying UE, obtains channel quality, the characteristic parameter of current hop UE in outlying UE
And before the channel quality of multiple alternative relaying UE, outlying UE can first according to conditions present, (feature of current hop UE be joined
Several or channel quality of current hop UE etc.) judge whether to need to be implemented S201-S204, optionally, outlying UE can by with
Under feasible implementation judge whether to need to be implemented S201-S204,
A kind of feasible implementation: outlying UE receives the refusal service message that current hop UE is sent, and refusal service disappears
Breath, which is used to indicate current hop UE, can not continue as outlying UE offer relay services.
In this kind of implementation, when outlying UE receives the refusal service message of current hop UE transmission, show current
UE due to unique characteristics parameter (for example, electricity is less than default power threshold) is relayed, and the outlying UE can not be continued as and mentioned
For relay services, in that case, outlying UE is by starting trunking reselecting method (executing S201-S204), to obtain
Characteristic parameter meets parameter preset condition and the preferable object relay UE of channel quality, and is replaced in current by object relay UE
There is provided relay services after UE for outlying UE, avoid due to current hop UE since characteristic parameter is unsatisfactory for parameter preset condition and
The phenomenon of communication quality difference between caused outlying UE and base station, so that the UE for currently providing relay services for outlying UE is in office
When quarter all can be outlying UE the preferable transfer service of service quality is provided, and then improve the communication between outlying UE and base station
Quality.
Another feasible implementation:
Fig. 3 is that the present invention is based on two flow charts of trunking reselecting method embodiment that D2D is communicated, referring to figure 3., the party
Method may include:
S301, outlying UE obtain channel quality of the current hop UE at the first moment and current time, and the first moment was to work as
Predetermined time before the preceding moment；
S302, outlying UE judge whether current hop UE is lower than the channel at the first moment in the channel quality at current time
Quality；
If so, S303 is executed, if it is not, process terminates；
S303, outlying UE judge that the difference of channel quality of the current UE at the first moment and the channel quality at current time is
It is no to be greater than preset threshold；
If so, S304 is executed, if it is not, process terminates；
S304, outlying UE obtain the channel quality, characteristic parameter and multiple alternative channels for relaying UE of current hop UE
Quality, wherein the characteristic parameter of each alternative relaying UE meets parameter preset condition, and current hop UE is provides for outlying UE
The UE of relay services.
It should be noted that S304 is identical with S201, after executing S304, it is also necessary to execute in embodiment illustrated in fig. 2
S202-S204, no longer repeated herein.
In the embodiment shown in fig. 3, optionally, the first moment can be the predetermined time before current time, for example,
At the time of first moment was before 10 minutes before current time；In actual application, it can set according to actual needs
The size of the relationship and preset threshold at the first moment and current time, the present invention are not specifically limited in this embodiment.
During actual use, outlying UE is by judging whether the channel quality of current hop UE is declining, when sentencing
The disconnected channel quality for obtaining current hop UE is declining, and when fall is greater than preset threshold, outlying UE starts trunking
Reselecting method (executes S201-S204), is met in parameter preset condition and the preferable target of channel quality with obtaining characteristic parameter
It replaces current hop UE to provide relay services for outlying UE after UE, and by object relay UE, avoids since current hop UE believes
The phenomenon of communication quality difference caused by road is of poor quality between outlying UE and base station, so that currently providing middle following the service for outlying UE
The UE of business at any time all can be outlying UE the preferable transfer service of service quality is provided, and then improve outlying UE and base station
Between communication quality.
It will be appreciated by persons skilled in the art that in the embodiment shown in fig. 3, outlying UE exists according to current hop UE
The channel quality at current time and the first moment judges whether starting trunking gravity treatment (executing S201-S204), can be with root
Judge whether starting relaying according to the channel quality of multiple predetermined times of the current hop before current time and current time
Equipment gravity treatment (executes S201-S204).
In any of the above-described embodiment, outlying UE will currently can be that outlying UE is mentioned by following feasible implementation
UE gravity treatment for relay services is object relay UE.
A kind of feasible implementation: outlying UE sends service request information to object relay UE, so that object relay UE
It obtains the authorization object relay UE that base station is sent and provides the authorization response message of relay services for outlying UE；Outlying UE receives target
The object relay UE that is used to indicate that relaying UE is sent provides the service response message of relay services for outlying UE.
Outlying UE sends to current hop UE and terminates service request information, so that current hop UE obtains the end that base station is sent
Only current hop UE is authorized to provide the termination authorization response message of relay services for outlying UE；Outlying UE receives current hop UE hair
The termination service response message for being used to indicate current hop UE and outlying UE offer relay services being provided sent.
In this kind of implementation, outlying UE makes object relay UE provide relay services for it first, then makes again
Current hop UE stops providing relay services for it, this ensure that the communication between outlying UE and base station is not in interrupt.
Another feasible implementation: outlying UE sends to current hop UE and terminates service request information, so that currently
Relaying UE obtains the termination authorization current hop UE that base station is sent and provides the termination authorization response message of relay services for outlying UE；
Outlying UE receives the termination clothes for being used to indicate current hop UE and terminating as outlying UE offer relay services that current hop UE is sent
Business response message.
Outlying UE sends service request information to object relay UE, so that object relay UE obtains the authorization mesh that base station is sent
Mark relaying UE provides the authorization response message of relay services for outlying UE；Outlying UE receives being used to indicate for object relay UE transmission
Object relay UE provides the service response message of relay services for outlying UE.
In this kind of implementation, outlying UE makes current hop UE stop providing relay services for it first, then again
So that object relay UE provides relay services for it, this avoid provide middle following the service simultaneously due to two relaying UE for outlying UE
Business, caused by the wasting of resources.
Fig. 4 is that the present invention is based on three flow chart of trunking reselecting method embodiment that D2D is communicated, the execution masters of this method
Body is arbitrary UE, which can be by software and or hardware realization, in the present embodiment, according to the positional relationship of UE, to UE
It is divided, in the present embodiment, the technical program, referred to as alternative by the executing subject UE of the present embodiment for ease of description
UE is relayed, referring to figure 4., this method may include:
S401, alternative relaying UE receive the channel quality request message that outlying UE is sent, the alternative characteristic parameter for relaying UE
Meet 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 UE is alternatively relayed are as follows: the quality for the channel that alternative relaying UE and outlying UE is used to communicate, or
The matter for the channel that person, the quality of channel of the alternative relaying UE with base station for communicating and alternative relaying UE and outlying UE are used to communicate
The lower channel quality of channel quality in amount；
S403, alternative relaying UE sent to outlying UE include channel quality response message so that outlying UE will it is alternative in
It is determined as object relay UE after UE, and outlying UE is made to be unsatisfactory for default feature ginseng in the characteristic parameter for judging current hop UE
Number, and/or, when the channel quality of object relay UE is greater than the channel quality of current hop UE, in currently providing for outlying UE
After service UE gravity treatment be object relay UE.
Channel quality, characteristic parameter and the parameter preset condition of embodiment shown in Fig. 4, in embodiment illustrated in fig. 2
Channel quality, characteristic parameter and parameter preset condition it is identical, no longer repeated herein.
During actual use, for any one alternative relaying UE, when alternatively relaying UE receives outlying UE hair
After the channel quality request message sent, the alternative UE that relays obtains its channel quality, and sends its channel quality to base station, so that
Outlying UE can determine that the highest alternative relaying UE of channel quality is object relay UE in multiple alternative relaying UE, so that
Outlying UE can be unsatisfactory for characteristic parameter judging the characteristic parameter of current hop UE, and/or, the channel quality of object relay UE
When channel quality greater than current hop UE, relaying UE of the object relay UE as outlying UE is reselected, so that outlying UE exists
The higher transfer service of service quality whenever can be obtained, and then improves the communication matter between outlying UE and base station
Amount.
It will be appreciated by persons skilled in the art that alternatively relaying UE can be asked in the channel quality for receiving base station transmission
When seeking message, obtain and simultaneously send alternative relaying UE channel quality to base station, can also active, periodically to base station send it
Channel quality, the present invention are not especially limited this.
Trunking reselecting method provided in an embodiment of the present invention based on D2D communication, the alternative UE that relays are receiving side
It after the channel quality request message that remote UE is sent, obtains and simultaneously sends its channel quality to outlying UE, so that outlying UE can be
Determine that the highest alternative relaying UE of channel quality is object relay UE in multiple alternative relaying UE, and no longer suitable in current hop UE
When outlying UE offer relay services are provided, current hop UE is replaced with into object relay UE, so that object relay UE provides for it
Relay services, so that the outlying UE higher transfer service of available service quality at any time, and then improve outlying
Communication quality between UE and base station.
In actual application, it can realize that outlying UE determines trunking by executing following three processes.
Process one: outlying UE determines alternative relaying UE in the UE that base station services.
Process two: outlying UE determines the need for carrying out relaying UE gravity treatment.
Process three: outlying UE will for the outlying UE UE gravity treatment for providing relay services be currently object relay UE.
In the following, being described in detail respectively for above three process.
Process one:
Fig. 5 A is that the present invention is based on the trunking reselecting method example IV flow charts that D2D is communicated, referring to figure 5., should
Method may include:
The UE that S501, outlying UE are serviced to base station sends characteristic parameter request message；
Corresponding, the UE of base station service receives the characteristic parameter request message that outlying UE is sent, characteristic parameter request message
Characteristic parameter for requesting alternatively to relay UE；
The UE that S502, base station service sends the response message including characteristic parameter to outlying UE；
The characteristic parameter for the UE that S503, outlying UE are serviced according to base station meets characteristic parameter in the UE of base station service pre-
The UE of setting parameter condition alternately relays UE；
S504, outlying UE send channel quality request message to alternative relaying UE；
Corresponding, the alternative UE that relays receives the channel quality request message that outlying UE is sent；
S505, alternative relaying UE obtain the channel quality of alternative relaying UE；
Wherein, the channel quality of UE is alternatively relayed are as follows: the quality for the channel that alternative relaying UE and outlying UE is used to communicate, or
The matter for the channel that person, the quality of channel of the alternative relaying UE with base station for communicating and alternative relaying UE and outlying UE are used to communicate
The lower channel quality of channel quality in amount；
S506, alternative relaying UE send the response message including channel quality to outlying UE；
S507, outlying UE are in multiple alternative relaying UE, using the highest alternative relaying UE of channel quality as object relay
UE。
Process two:
Fig. 5 B is that the present invention is based on five flow charts of trunking reselecting method embodiment that D2D is communicated, real shown in Fig. 5 A
On the basis of applying example, B, this method may include: referring to figure 5.
S508, outlying UE send channel quality request message to current hop UE；
S509, current hop UE send the response message of the channel quality including 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 of the characteristic parameter including current hop UE to outlying UE；
S512, outlying UE judge whether the characteristic parameter of current hop UE meets parameter preset condition；
If so, S513 is executed, if it is not, then executing 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, S514 is executed, if it is not, then executing S512；
S514, outlying UE, which are determined, for the outlying UE UE gravity treatment for providing relay services to be currently object relay UE.
It should be noted that there is no sequential relationship between S506-S507 and S508-S509, S506-S507 and S508-
S509 can be executed sequentially, also may be performed simultaneously；There is no sequential relationship between S512 and S513, S512 can be first carried out,
S513 can be first carried out.
Process three:
Fig. 5 C is that the present invention is based on six flow charts of trunking reselecting method embodiment that D2D is communicated, in Fig. 5 A and Fig. 5 B
On the basis of illustrated embodiment, C, this method may include: referring to figure 5.
S515, outlying UE send service request information to object relay UE；
S516, object relay UE send authorization request message to base station according to service request information；
Wherein, authorization request message includes the mark of outlying UE, and authorization object relay UE in request base station provides for outlying UE
Relay services；
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 and provides relay services for outlying UE；
S519, outlying UE send to current hop UE and terminate service request information；
S520, current hop UE send to base station according to termination service request information and terminate authorization request message；
Wherein, the mark that authorization request message includes outlying UE is terminated, it is side that request base station, which terminates authorization current hop UE,
Remote UE provides relay services；
S521, base station are sent to current hop UE terminates authorization response message；
S522, current hop UE send to outlying UE and terminate service response message；
Wherein, termination service response message is used to indicate current hop UE and terminates as outlying UE offer relay services.
It should be noted that not having sequential relationship between S515-S518 and S519-S522, S515- can be first carried out
S518 can also first carry out S519-S522.
It will be appreciated by persons skilled in the art that when executing above three process for the first time, the above process one, process
Two, three needs of process sequence executes, and in intermediate implementation procedure, above three process can be executed individually.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above-mentioned each method embodiment can lead to
The relevant hardware of program instruction is crossed to complete.Program above-mentioned can be stored in a computer readable storage medium.The journey
When being executed, execution includes the steps that above-mentioned each method embodiment to sequence；And storage medium above-mentioned include: ROM, RAM, magnetic disk or
The various media that can store program code such as person's CD.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (8)
1. a kind of trunking reselecting method based on D2D communication characterized by comprising
Current hop user equipment (UE) current time channel quality lower than channel quality at the first moment, and described the
When the difference of the channel quality at one moment and the channel quality at the current time is greater than preset threshold, outlying UE is obtained in current
After the channel quality of the channel quality of UE, characteristic parameter and multiple alternative relaying UE, wherein the spy of each alternative relaying UE
Sign parameter meets parameter preset condition, and the current hop UE is provides the UE of relay services for the outlying UE；
The outlying UE is in the multiple alternative relaying UE, using the highest alternative relaying UE of channel quality as object relay
UE；
The outlying UE judges whether the characteristic parameter of current hop UE meets the parameter preset condition, the object relay UE
Channel quality whether be greater than the channel quality of the current hop UE；
In judging result are as follows: the characteristic parameter of the current hop UE is unsatisfactory for the parameter preset condition, and/or, the mesh
When the channel quality of mark relaying UE is greater than the channel quality of the current hop UE, the outlying UE will currently be the outlying UE
The UE gravity treatment for providing relay services is the object relay UE；
Wherein, the outlying user equipment (UE) obtain the channel quality of current hop UE, characteristic parameter and it is multiple it is alternative in
Before the channel quality of UE, further includes:
The outlying UE obtains channel quality of the current hop UE at the first moment and current time, and first moment is
Predetermined time before the current time；
The outlying UE judges the current hop UE when whether the channel quality at the current time is lower than described first
The channel quality at quarter, and whether the difference of the channel quality at first moment and the channel quality at the current time is greater than
Preset threshold.
2. the method according to claim 1, wherein obtaining the channel of multiple alternative relaying UE in the outlying UE
Before quality, further includes:
The outlying UE obtains the characteristic parameter of the UE of base station service；
The characteristic parameter for the UE that the outlying UE is serviced according to the base station, characteristic parameter meets in the UE that the base station is serviced
The UE of the parameter preset condition alternately relays UE；
The outlying UE obtains the channel quality of multiple alternative relaying UE, comprising:
The outlying UE sends channel quality request message to each alternative relaying UE, and receives each alternative relaying UE hair
The response message including channel quality sent.
3. the method according to claim 1, wherein the outlying UE currently will provide relaying for the outlying UE
The UE gravity treatment of service is the object relay UE, comprising:
The outlying UE sends service request information to the object relay UE, so that the object relay UE obtains base station and sends
The authorization object relay UE provide the authorization response message of relay services for the outlying UE；
The outlying UE receives the object relay UE that is used to indicate that the object relay UE is sent and provides for the outlying UE
The service response message of relay services；
The outlying UE sends to the current hop UE and terminates service request information, so that described in current hop UE acquisition
The termination that base station is sent authorizes the current hop UE to provide the termination authorization response message of relay services for the outlying UE；
The outlying UE receives the current hop UE that is used to indicate that the current hop UE is sent and terminates as the outlying UE
The termination service response message of relay services is provided.
4. the method according to claim 1, wherein obtaining current hop UE's in the outlying user equipment (UE)
Before the channel quality of channel quality, characteristic parameter and multiple alternative relaying UE, further includes:
Receive current hop UE send refusal service message, the refusal service message be used to indicate the current hop UE without
Method continues as the outlying UE and provides relay services.
5. the method according to claim 1, wherein the characteristic parameter includes remaining capacity and movement speed；
The parameter preset condition includes: that remaining capacity is greater than the condition of default charge value and the movement speed of UE less than UE
The condition of default movement speed.
6. method according to claim 1-5, which is characterized in that
The channel quality of current hop UE are as follows: the quality of current hop UE and the outlying UE channel for being used to communicate, alternatively, institute
What the quality and the current hop UE for stating channel of the current hop UE with base station for communicating were used to communicate with the outlying UE
The lower channel quality of channel quality in the quality of channel；
The channel quality of alternative relaying UE are as follows: the quality of the alternative relaying UE and the outlying UE channel for being used to communicate, or
Person, the quality and the alternative relaying UE and outlying UE of channel of the alternative relaying UE with base station for communicating are for leading to
The lower channel quality of channel quality in the quality of the channel of letter.
7. a kind of trunking reselecting method based on D2D communication characterized by comprising
Alternative relaying UE receives the channel quality request message that outlying UE is sent, and the characteristic parameter of the alternative relaying UE meets pre-
Setting parameter condition；
The alternative relaying UE obtains the channel quality of the alternative relaying UE, the channel quality of the alternative relaying UE are as follows: institute
The quality of alternative relaying UE with the outlying UE channel for being used to communicate are stated, alternatively, the alternative relaying UE is with base station for leading to
The quality of the channel of letter and the alternative relaying UE and channel quality in the quality of the outlying UE channel for being used to communicate are lower
Channel quality；
The alternative relaying UE sends the response message including channel quality to the outlying UE, so that outlying UE is multiple alternative
It relays in UE, using the highest alternative relaying UE of channel quality as object relay UE, and makes the outlying UE current in judgement
The characteristic parameter of relaying UE is unsatisfactory for the parameter preset condition, and/or, the channel quality of the object relay UE is greater than described
It will for the outlying UE UE gravity treatment for providing relay services be currently the object relay when channel quality of current hop UE
UE, wherein the current hop UE is currently provides the UE of relay services for the outlying UE；Wherein, in the alternative relaying
UE is sent to the outlying UE after the response message including channel quality, further includes:
The alternative relaying UE receives the service request information that the outlying UE is sent, and the service request information is for requesting institute
It states alternative relaying UE and provides relay services for the outlying UE；
The alternative relaying UE sends the authorization request message identified including the outlying UE to base station, and receives base station transmission
Authorization response message, the authorization response message indicate that the alternative relaying UE provides relay services for the outlying UE；
The alternative relaying UE is used to indicate the alternative relaying UE to the outlying UE transmission and provides relaying for the outlying UE
The service response message of service.
8. the method according to the description of claim 7 is characterized in that the alternative relaying UE receives the channel matter that outlying UE is sent
Before amount request message, further includes:
The alternative relaying UE receives the characteristic parameter request message that outlying UE is sent, and the characteristic parameter request message is for asking
Seek the characteristic parameter of the alternative relaying UE；
The alternative relaying UE sends the response message including characteristic parameter to the outlying UE.
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