CN104918330B - A kind of D2D sends the selection method and D2D transmissions UE of resource pool - Google Patents
A kind of D2D sends the selection method and D2D transmissions UE of resource pool Download PDFInfo
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- CN104918330B CN104918330B CN201410097698.3A CN201410097698A CN104918330B CN 104918330 B CN104918330 B CN 104918330B CN 201410097698 A CN201410097698 A CN 201410097698A CN 104918330 B CN104918330 B CN 104918330B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/02—Selection of wireless resources by user or terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/16—Interfaces between hierarchically similar devices
- H04W92/18—Interfaces between hierarchically similar devices between terminal devices
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Abstract
The selection method of resource pool is sent the invention discloses a kind of D2D and D2D sends UE.Its method includes：D2D sends UE and sends the reference signal strength of the corresponding information source of resource pool and/or the priority of information source, selection target information source according to D2D；The D2D sends the corresponding D2D of UE selection target information sources and sends resource pool.An embodiment of the present invention provides the selection schemes that D2D sends resource pool.It is selected according to the priority etc. of the reference signal strength of information source and/or information source, ensures that D2D sends UE when moving, suitable D2D can be selected to send the transmission that resource pool carries out D2D Discovery/Communication message.
Description
Technical field
The present invention relates to selection methods and D2D hairs that wireless communication technology field more particularly to a kind of D2D send resource pool
Send UE.
Background technology
In long term evolution（Long Term Evolution, LTE）In system, it is that network is central controlled to communicate take
Mode, i.e. user equipment（User Equipment, UE）Uplink and downlink data all sent and received under the control of a network.
Communication between UE and UE, is forwarded by network and is controlled, and direct communication link is not present between UE and UE, this
The data transmission of UE and network can be referred to as equipment to network under mode（Device to Network, D2N）Transmission.
With the development of the communication technology, it is proposed that device-to-device（Device to Device, D2D）Close to service.
Third generation partner program（3GPP）In, D2D includes following two major classes close to servicing：
Close to service discovery（D2D Discovery）：UE confirms another UE in its vicinity using E-UTRA.Example
Such as, user can using D2D UE using the service come the taxi of finding nearby, find friend etc. in its vicinity.
Close to communication for service（D2D Communication）：By directly establishing chain between two UE close to each other
Road converts script to local direct communication link by the communication link of network transmission, to save a large amount of bandwidth and
Network efficiency；Or two UE close to each other, the cheap communication clothes of stable high speed can be obtained using direct point-to-point data link
Business.It is usually to be carried out under network controls or auxiliary close to communication for service, evolved base station（eNB）Can be possibly even
It carries out dynamically distributing resource close to the UE of communication for service.
For ease of description, two kinds of Linktypes can be defined：
D2D links：Refer to the link directly communicated between equipment and equipment；
D2N links：The link communicated between equipment and network node.
In addition, it is two kinds of roles that the UE for participating in D2D Discovery/Communication, which is divided to,：
D2D sends UE：Send the UE of D2D Discovery/Communication message；
D2D receives UE：Receive the UE that D2D sends the D2D Discovery/Communication message that UE is sent.
D2D Discovery are directed to, 3GPP defines two spike-type cultivars distribution type at present：
Class1（Type1）：That is D2D sends UE voluntarily one money of selection in a D2D Discovery sends resource pool
Source carries out the transmission of D2D Discovery message；
Type 2（Type2）：That is D2D sends the hair that UE carries out D2D Discovery message in the resource that network distributes
It send.It is dynamic or semi-static to send resource according to the D2D Discovery message of network distribution, and Type2 can divide again
For Type2A and Type2B two spike-type cultivars distribution types.For Type2A, network can be that D2D sends UE dynamic allocation D2D
Discovery message transmits the resource used；For Type2B, network can be that D2D sends the semi-static distribution D2D of UE
Discovery message transmits the resource used.
For being in the D2N free time（IDLE）The UE of state does not establish RRC with base station due to it and connects, when IDLE UE make
When sending UE for D2D, D2D Discovery resource allocation types can only select Type1.
D2D Communication are directed to, 3GPP also defines two spike-type cultivars distribution type at present：
Pattern 1（Mode1）：That is network scheduling D2D sends UE and carries out the resource that D2D transmissions use.
Pattern 2（Mode2）：That is D2D sends UE voluntarily one money of selection in D2D Communication send resource pool
Source carries out the transmission of D2D Communication message.
For the UE in D2N IDLE states, RRC is not established with base station due to it and is connected, when IDLE UE are as D2D
When sending UE, D2D Communication resource allocation types can only select Mode2.
For the UE in RRC connected states, the resource allocation type of D2D Discovery/Communication be by
Network-control.But for UE or off-grid UE, D2D Discovery/Communication in RRC Idle state
Resource allocation type then can not be by network-control, for D2D Discovery scenes, D2D sends the resource allocation type of UE
It can only select Type1；For D2D Communication scenes, the resource allocation type that D2D sends UE can only select Mode2.
For these UE, the D2D that may receive serving cell simultaneously sends resource pool and the D2D of adjacent cell sends resource pool, very
To can also receive relaying（relay）The D2D of UE forwardings sends resource pool.In this case, it needs to consider how D2D sends UE
It carries out D2D and sends resource pool selection.
Wherein, for D2D Discovery scenes, it refers to that D2D Discovery send resource pool that D2D, which sends resource pool,；
For D2D Communication scenes, it refers to that D2D Communication send resource pool that D2D, which sends resource pool,.
Invention content
The object of the present invention is to provide a kind of D2D send resource pool selection method and D2D send UE, with solve how from
Multiple D2D send the problem of being selected in resource pool.
The purpose of the present invention is what is be achieved through the following technical solutions：
A kind of D2D sends the selection method of resource pool, including：
D2D sends UE and sends the reference signal strength of the corresponding information source of resource pool and/or the priority of information source according to D2D,
Selection target information source；
The D2D sends the corresponding D2D of UE selection target information sources and sends resource pool.
An embodiment of the present invention provides the selection schemes that D2D sends resource pool.According to the reference signal strength of information source and/or
The priority etc. of information source is selected, and ensures that D2D sends UE when moving, and suitable D2D can be selected to send resource pool and carried out
The transmission of D2D Discovery/Communication message.
In the embodiment of the present invention, D2D send resource pool information source can with but be not limited only to be that D2D sends the resident small of UE
Area, adjacent cell, relaying.
Wherein, relaying can with but be not limited only to be the relay node in cellular network, can also be relaying UE.
The priority of information source can be preconfigured, and the persistent district that can also be D2D transmissions UE passes through the side such as broadcast
Formula is sent to D2D and sends UE's.
In the embodiment of the present invention, several preferably priority ranking situations are as follows：
Persistent district>Adjacent cell>Relaying, alternatively,
Persistent district=adjacent cell>Relaying, alternatively,
Persistent district=adjacent cell=relaying
Wherein, by taking the priority relationship of persistent district and adjacent cell as an example, persistent district>Adjacent cell refers to persistent district
Priority be more than adjacent cell priority, persistent district=adjacent cell, refer to persistent district priority and adjacent cell it is preferential
Grade is identical.
The reference signal of information source can be some signal specific, which can embody the channel quality of information source, example
Such as the cell reference signals of D2N networks（CRS）Etc..
Below by taking the information source being able to detect that is persistent district and adjacent cell as an example, the preferred implementation to selection target information source
Mode is illustrated.
The mode one of selection target information source：
D2D sends reference signal strength the first predetermined condition of satisfaction that UE judges whether there is adjacent cell；
If there is adjacent cell reference signal strength meet the first predetermined condition, D2D send UE select the adjacent cell as
Target information source；
If the reference signal strength of adjacent cell does not meet the first predetermined condition, D2D sends UE selections persistent district and makees
For target information source.
Wherein, meeting the first predetermined condition refers to：Reference signal strength is more than the reference signal strength of persistent district, and poor
Value is more than first time threshold more than the duration of the second threshold value.
Wherein, the value of first time threshold is determined according to practical application request, under extreme case, first time threshold
Value can be 0.
Wherein, the value of the second threshold value is determined according to practical application request.Preferably, the second threshold value is D2D resources
Select corresponding signal strength deviant.
Wherein, it if there is the reference signal strength of multiple adjacent cells meets the first predetermined condition, can therefrom select to refer to
The maximum adjacent cell of signal strength can also therefrom randomly choose an adjacent cell as target information source, also as target information source
It can therefrom select an adjacent cell as target information source according to other rules.
The mode two of selection target information source：
D2D sends UE and judges whether the reference signal strength of persistent district is more than the first threshold value；
If the reference signal strength of persistent district is more than the first threshold value, D2D sends UE and selects persistent district as mesh
Mark information source；
If the reference signal strength of persistent district is not more than（It is less than or equal to）First threshold value, D2D send UE and press
According to one selection target information source of aforesaid way.
Wherein, the value of the first threshold value is determined according to practical application request.
The mode three of selection target information source：
D2D sends the priority that UE sends the corresponding information source of resource pool according to D2D, select the information source of highest priority as
Target information source.
Wherein, if there is the information source of multiple highest priorities, then the information source that can randomly choose a highest priority is made
For target information source, it can also therefrom select the highest information source of reference signal strength as target information source.
The mode four of selection target information source：
D2D sends UE and judges whether the priority of persistent district is more than the priority of adjacent cell；
If the priority of persistent district is more than the priority of adjacent cell, it is strong that D2D transmissions UE judges whether there is reference signal
Degree meets the adjacent cell of the second predetermined condition, if so, then selecting the adjacent cell of reference signal strength the second predetermined condition of satisfaction
As target information source, otherwise, select persistent district as target information source；
If the priority of persistent district is not more than the priority of adjacent cell, D2D sends UE and judges whether there is reference signal
Intensity meets the adjacent cell of third predetermined condition, if so, then selecting the neighbour that reference signal strength meets third predetermined condition small
Area is as target information source, otherwise, selects persistent district as target information source.
Wherein, it refers to that reference signal strength is more than the reference signal strength of persistent district, and poor to meet the second predetermined condition
Value is more than second time threshold more than the duration of third threshold value.
Wherein, meeting third predetermined condition refers to, reference signal strength is more than the reference signal strength of persistent district, and poor
Value is more than third time threshold more than the duration of the 4th threshold value.
Wherein, second time threshold and the value of third time threshold are determined according to practical application request, under extreme case,
The value of second time threshold can go 0, and the value of third time threshold can also take 0.
Wherein, the value of third threshold value and the 4th threshold value is determined according to practical application request.
Preferably, in practical application, third threshold value can be set and be more than the 4th threshold value.
Wherein, the case where priority of adjacent cell being more than for the priority of persistent district, if there is multiple adjacent cells
Reference signal strength meets the second predetermined condition, and the maximum adjacent cell of reference signal strength can therefrom be selected to believe as target
Source can also therefrom randomly choose an adjacent cell as target information source, can also therefrom select a neighbour according to other rules
Cell is as target information source.
Wherein, the case where priority of adjacent cell being not more than for the priority of persistent district, if there is multiple adjacent cells
Reference signal strength meet third predetermined condition, can therefrom select the maximum adjacent cell of reference signal strength as target believe
Source can also therefrom randomly choose an adjacent cell as target information source, can also therefrom select a neighbour according to other rules
Cell is as target information source.
The mode five of selection target information source：
D2D sends UE and judges whether the reference signal strength of persistent district is more than the first threshold value；
If the reference signal strength of persistent district is more than the first threshold value, D2D sends UE and selects persistent district as mesh
Mark information source；
If the reference signal strength of persistent district is not more than the first threshold value, D2D sends UE four choosings in the manner described above
Select target information source.
If the information source being able to detect that is persistent district and relaying, the realization method of selection target information source is referred to
The selection mode of each target information source is stated, which is not described herein again.
If the information source being able to detect that is persistent district, adjacent cell and relaying, and the priority phase of adjacent cell and relaying
Together, the realization method of selection target information source is referred to the selection mode of above-mentioned each target information source, and which is not described herein again.
If the information source being able to detect that is persistent district, adjacent cell and relaying, and the priority of adjacent cell is more than relaying
Priority.Aforesaid way one~tri- is referred to when selection target information source.It can also be with reference to above-mentioned side when selection target information source
Formula four, but when the priority of persistent district is more than the priority of adjacent cell, if no adjacent cell meets above-mentioned condition, sentence
It is disconnected whether have the reference signal strength of relaying be more than with the reference signal strength of persistent district compared with the 5th threshold value it is lasting when
Between more than the 4th time threshold relaying, if so, select the relaying as target information source, otherwise, select persistent district as
Target information source；When the priority of persistent district is not more than the priority of adjacent cell, if no adjacent cell meets above-mentioned condition,
The reference signal strength for then judging whether there is relaying is more than holding for the 6th threshold value compared with the reference signal strength of persistent district
The continuous time is more than the relaying of the 5th time threshold, if so, selecting the relaying as target information source, otherwise, selects persistent district
As target information source.It can also be with reference to aforesaid way five when selection target information source.
If the information source being able to detect that is persistent district, adjacent cell and relaying, and the priority relayed is more than adjacent cell
Priority.Aforesaid way one~tri- is referred to when selection target information source.It can also first judge to be resident when selection target information source
Whether the priority of cell is more than the priority of relaying, when the priority of persistent district is more than the priority of relaying, sentences successively
Whether disconnected relaying and adjacent cell meet predetermined condition, preferential that relaying is selected to believe as target if there is relaying meets predetermined condition
Source just selects persistent district as target information source only when relaying and adjacent cell are unsatisfactory for predetermined condition；In persistent district
Priority no more than relaying priority when, judge successively relaying and adjacent cell whether meet predetermined condition, if there is relay
Meet predetermined condition, it is preferential to select relaying as target information source, only when relaying and adjacent cell are unsatisfactory for predetermined condition,
Select persistent district as target information source.Before whether the priority for judging persistent district is more than the priority of relaying, also may be used
First to judge whether the reference signal strength of persistent district is more than the first threshold value, if it is greater than the first threshold value, selection is resident
Otherwise cell judges whether the priority of persistent district is more than the priority of relaying as target information source, and as procedure described above
Selection target information source.
Based on inventive concept same as method, the embodiment of the present invention also provides a kind of D2D transmissions UE, including：
Target information source selecting module, reference signal strength and/or letter for sending the corresponding information source of resource pool according to D2D
The priority in source, selection target information source；
Resource pool selecting module sends resource pool for the corresponding D2D of selection target information source.
An embodiment of the present invention provides the selection schemes that D2D sends resource pool.According to the reference signal strength of information source and/or
The priority etc. of information source is selected, and ensures that D2D sends UE when moving, and suitable D2D can be selected to send resource pool and carried out
The transmission of D2D Discovery/Communication message.
Preferably, target information source selecting module is used for：
The reference signal strength for judging whether there is adjacent cell or relaying meets the first predetermined condition, meets the first predetermined condition
Refer to：Reference signal strength is more than the reference signal strength of persistent district, and difference is super more than the duration of the second threshold value
Cross first time threshold；
If there is adjacent cell or the reference signal strength of relaying meet the first predetermined condition, the adjacent cell or relaying are selected
As target information source；
If meeting the first predetermined condition without adjacent cell or the reference signal strength of relaying, select persistent district as mesh
Mark information source.
Preferably, second threshold value is the corresponding signal strength deviant of D2D resource selections.
Preferably, when the reference signal strength for judging whether there is adjacent cell or relaying meets the first predetermined condition, the mesh
Mark information source selecting module is used for：
Judge whether the reference signal strength of persistent district is more than the first threshold value；
If the reference signal strength of persistent district is more than the first threshold value, the persistent district is selected to believe as target
Source；
If the reference signal strength of persistent district is less than or equal to the first threshold value, adjacent cell or relaying are judged whether there is
Reference signal strength meet the first predetermined condition.
Preferably, the target information source selecting module is used for：
The priority that the corresponding information source of resource pool is sent according to D2D, selects the information source of highest priority as target information source.
Preferably, the information source includes：Persistent district, adjacent cell and relaying.
Preferably, the priority of information source is pre-configured with or persistent district broadcast.
Preferably：The priority of persistent district is more than the priority of adjacent cell, and the priority of adjacent cell is more than the excellent of relaying
First grade；Alternatively, the priority of persistent district is equal to the priority of adjacent cell, it is more than the priority of relaying；Alternatively, persistent district,
Adjacent cell is identical with the priority of relaying.
Preferably, the target information source selecting module is used for：
Judge whether the priority of persistent district is more than the priority of adjacent cell and relaying；
If the priority of persistent district is more than the priority of adjacent cell and relaying, it is full to judge whether there is reference signal strength
The adjacent cell or relaying of the second predetermined condition of foot, if so, then selecting the neighbour that reference signal strength meets the second predetermined condition small
Otherwise area or relaying select persistent district as target information source as target information source；Meeting the second predetermined condition refers to, reference
Signal strength is more than the reference signal strength of persistent district, and difference was more than the second time more than the duration of third threshold value
Threshold value.
If the priority of persistent district is less than or equal to adjacent cell or the priority of relaying, reference signal is judged whether there is
Intensity meets the adjacent cell or relaying of third preset condition, if so, reference signal strength is then selected to meet third preset condition
Adjacent cell or relaying otherwise select persistent district as target information source as target information source.Meeting third preset condition is
Refer to, reference signal strength is more than the reference signal strength of persistent district, and difference is more than more than the duration of the 4th threshold value
Third time threshold.
Preferably, the third threshold value is more than the 4th threshold value.
Preferably, when whether judging the priority of persistent district more than adjacent cell and the priority of relaying, the target letter
Source selecting module is used for：
Judge whether the reference signal strength of persistent district is more than the first threshold value；
If the reference signal strength of persistent district is more than the first threshold value, select persistent district as target information source；
If the reference signal strength of persistent district is less than or equal to the first threshold value, judge that the priority of persistent district is
The no priority more than adjacent cell and relaying.
Preferably, the reference signal of information source includes：Cell reference signals.
Based on inventive concept same as method, the embodiment of the present invention also provides a kind of D2D and sends UE, including processor and
Memory.
Processor is configured as executing the computer program with following function：The corresponding letter of resource pool is sent according to D2D
The reference signal strength in source and/or the priority of information source, selection target information source；The corresponding D2D of selection target information source sends resource
Pond；
Memory is configured as the code of storage above computer program.
An embodiment of the present invention provides the selection schemes that D2D sends resource pool.According to the reference signal strength of information source and/or
The priority etc. of information source is selected, and ensures that D2D sends UE when moving, and suitable D2D can be selected to send resource pool and carried out
The transmission of D2D Discovery/Communication message.
Description of the drawings
Fig. 1 is method flow diagram provided in an embodiment of the present invention；
Fig. 2 is that a kind of D2D provided in an embodiment of the present invention sends UE schematic diagrames；
Fig. 3 is that another kind D2D provided in an embodiment of the present invention sends UE schematic diagrames.
Specific implementation mode
The core concept of the embodiment of the present invention is：Under D2D Discovery scenes or D2D Communication scenes
Under, D2D send multiple D2D that UE can be detected according to it send the corresponding information source of resource pool reference signal strength and/or
The priority of information source is determined sends resource pool using the D2D which information source is sent.
Below in conjunction with attached drawing, technical solution provided in an embodiment of the present invention is described in detail.
A kind of D2D provided in an embodiment of the present invention sends the selection method of resource pool as shown in Figure 1, specifically including following behaviour
Make：
Step 100, D2D send the reference signal strength and/or information source that UE sends the corresponding information source of resource pool according to D2D
Priority, selection target information source.
Step 110, the D2D send the corresponding D2D of UE selection target information sources and send resource pool.
An embodiment of the present invention provides the selection schemes that D2D sends resource pool.According to the reference signal strength of information source and/or
The priority etc. of information source is selected, and ensures that D2D sends UE when moving, and suitable D2D can be selected to send resource pool and carried out
The transmission of D2D Discovery/Communication message.
In the embodiment of the present invention, D2D send resource pool information source can with but be not limited only to be that D2D sends the resident small of UE
Area, adjacent cell, relaying.
Wherein, relaying can with but be not limited only to be the relay node in cellular network, can also be relaying UE.
The priority of information source can be preconfigured, and the persistent district that can also be D2D transmissions UE passes through the side such as broadcast
Formula is sent to D2D and sends UE's.
In the embodiment of the present invention, several preferably priority ranking situations are as follows：
Persistent district>Adjacent cell>Relaying, alternatively,
Persistent district=adjacent cell>Relaying, alternatively,
Persistent district=adjacent cell=relaying
Wherein, by taking the priority relationship of persistent district and adjacent cell as an example, persistent district>Adjacent cell refers to persistent district
Priority be more than adjacent cell priority, persistent district=adjacent cell, refer to persistent district priority and adjacent cell it is preferential
Grade is identical.
The reference signal of information source can be some signal specific, which can embody the channel quality of information source, example
Such as the cell reference signals of D2N networks（CRS, Cell-specific Reference Signal）Etc..
Wherein, reference signal strength can with but be not limited only to refer to the reference signal Reference Signal Received Power
（Reference Signal Receiving Power, RSRP）Or Reference Signal Received Quality（Reference Signal
Receiving Quality, RSRQ）.
Below by taking the information source being able to detect that is persistent district and adjacent cell as an example, the preferred implementation to selection target information source
Mode is illustrated.
The mode one of selection target information source：
D2D sends reference signal strength the first predetermined condition of satisfaction that UE judges whether there is adjacent cell；If there is adjacent cell
Reference signal strength meet the first predetermined condition, D2D send UE select the adjacent cell as target information source；If without adjacent small
The reference signal strength in area meets the first predetermined condition, and D2D sends UE and selects persistent district as target information source.
Wherein, it refers to that reference signal strength is more than the reference signal strength of persistent district, and poor to meet the first predetermined condition
Value is more than first time threshold more than the duration of the second threshold value.
Wherein, the value of first time threshold is determined according to practical application request, under extreme case, first time threshold
Value can be 0.
Wherein, the value of the second threshold value is determined according to practical application request.Preferably, the second threshold value is D2D resources
Select corresponding signal strength deviant.
Wherein, it if there is the reference signal strength of multiple adjacent cells meets the first predetermined condition, can therefrom select to refer to
The maximum adjacent cell of signal strength can also therefrom randomly choose an adjacent cell as target information source, also as target information source
It can therefrom select an adjacent cell as target information source according to other rules.
Under D2D Discovery scenes, it is assumed that the D2D in D2N IDLE states sends UE（Hereinafter referred to as UE）It resides in
Cell A（Cell A）, the realization method of a selection D2D Discovery transmission resource pools is as follows in the manner described above：
UE execute adjacent cell measurement, can with but be not limited only in CRS, the synchronizing signal etc. for detecting adjacent cell, determine
Detect adjacent cell, such as Cell B.
If the CRS signal strengths of the D2N links of Cell A are SServing_cell, the CRS of the D2N links of adjacent cell Cell B
Signal strength is Sneighbour_cell_B, offset is the corresponding signal strength deviant of D2D resource selections, once then Cell B
Meet with the CRS signal strengths of Cell A：Sneighbour_cell_B≥SServing_cell+ offset, and certain time（The
One time threshold）Afterwards, then UE selects the corresponding D2D Discovery of Cell B to send resource pool, i.e., believes from the system of Cell B
The D2D Discovery that Cell B are obtained in breath send resource pool, and the transmission of D2D Discovery message is therefrom selected to use
Resource.
The selection mode that D2D under D2D Communication scenes sends resource pool is referred to the above process, here
It repeats no more.
The mode two of selection target information source：
D2D sends UE and judges whether the reference signal strength of persistent district is more than the first threshold value；
If the reference signal strength of persistent district is more than the first threshold value, D2D sends UE and selects persistent district as mesh
Mark information source；
If the reference signal strength of persistent district is not more than（It is less than or equal to）First threshold value, D2D send UE and press
According to one selection target information source of aforesaid way.
Wherein, the value of the first threshold value is determined according to practical application request.
Under D2D Dicovery scenes, it is assumed that the D2D in D2N IDLE states sends UE（Hereinafter referred to as UE）It resides in
Cell A（Cell A）, the realization method of two selection D2D Dicovery transmission resource pools is as follows in the manner described above：
If the D2N link CRS signal strengths of Cell A（RSRP or RSRQ）More than the first threshold value, UE does not execute adjacent small
Region measurement, selection send resource pool using the corresponding D2D Dicovery of Cell A.Can be D2D Dicovery message needs
When transmission, UE sends selection resource in resource pool from the D2D Dicovery that Cell A are broadcasted and is sent.
With the movement of UE, when the D2N link CRS signal strengths of Cell A are less than or equal to the first threshold value, UE is executed
Adjacent cell measurement, can with but be not limited only to, in CRS, the synchronizing signal etc. for detecting adjacent cell, confirmly detect adjacent cell, example
Such as Cell B.
If the CRS signal strengths of the D2N links of Cell A are SServing_cell, the CRS of the D2N links of adjacent cell Cell B
Signal strength is Sneighbour_cell_B, offset is the corresponding signal strength deviant of D2D resource selections, once then Cell B
Meet with the CRS signal strengths of Cell A：Sneighbour_cell_B≥SServing_cell+ offset, and certain time（The
One time threshold）Afterwards, then UE judgements need to carry out the switching that D2D Dicovery send resource pool, that is, discharge the D2D of Cell A
Dicovery transmissions are speeded from cloud, and the D2D Dicovery that Cell B are obtained from the system information of Cell B send resource pool, and
Therefrom selection D2D Dicovery message sends the resource used.
The selection mode that D2D under D2D Communication scenes sends resource pool is referred to the above process, here
It repeats no more.
The mode three of selection target information source：
D2D sends the priority that UE sends the corresponding information source of resource pool according to D2D, select the information source of highest priority as
Target information source.
Wherein, if there is the information source of multiple highest priorities, then the information source that can randomly choose a highest priority is made
For target information source, it can also therefrom select the highest information source of reference signal strength as target information source.
Under D2D Dicovery scenes, it is assumed that the D2D in D2N IDLE states sends UE（Hereinafter referred to as UE）It resides in
Cell A（Cell A）, the realization method of three selection D2D Dicovery transmission resource pools is as follows in the manner described above：
If the D2N link CRS intensity of Cell A is higher than the first threshold value, UE does not execute adjacent cell measurement, D2D
When Discovery message needs to send, then UE from Cell A broadcasts D2D Discovery send selected in resource pool resource into
Row is sent.
As UE is moved, when the D2N link CRS signal strengths of Cell A are less than the first threshold value, UE starts to execute inspection
Survey other synchronizing signals.Assuming that detecting relaying（relay）The synchronizing signal of UE.
If information source priority is as follows：Persistent district>Relay UE, then UE preferentially selects the D2D of persistent district
Discovery sends resource pool；
If information source priority is as follows：Persistent district=relay UE, then UE can randomly choose one of information source
D2D Discovery send resource pool.
The selection mode that D2D under D2D Communication scenes sends resource pool is referred to the above process, here
It repeats no more.
The mode four of selection target information source：
D2D sends UE and judges whether the priority of persistent district is more than the priority of adjacent cell；
If the priority of persistent district is more than the priority of adjacent cell, it is strong that D2D transmissions UE judges whether there is reference signal
Degree meets the adjacent cell of the second predetermined condition, if so, then selecting the adjacent cell of reference signal strength the second predetermined condition of satisfaction
As target information source, otherwise, select persistent district as target information source；
If the priority of persistent district is not more than the priority of adjacent cell, D2D sends UE and judges whether there is reference signal
Intensity meets the adjacent cell of third predetermined condition, if so, then selecting the neighbour that reference signal strength meets third predetermined condition small
Area is as target information source, otherwise, selects persistent district as target information source.
Meeting the second predetermined condition refers to, reference signal strength is more than the reference signal strength of persistent district, and difference is big
It is more than second time threshold in the duration of third threshold value.
Meeting third predetermined condition refers to, reference signal strength is more than the reference signal strength of persistent district, and difference is big
It is more than third time threshold in the duration of the 4th threshold value.
Wherein, second time threshold and the value of third time threshold are determined according to practical application request, under extreme case,
The value of second time threshold can go 0, and the value of third time threshold can also take 0.
Wherein, the value of third threshold value and the 4th threshold value is determined according to practical application request.
When the highest priority of persistent district, it is desirable to which preferential persistent district of choosing is as Target cell.Preferably, practical
In, third threshold value can be set and be more than the 4th threshold value.
Wherein, the case where priority of adjacent cell being more than for the priority of persistent district, if there is multiple adjacent cells
The duration that reference signal strength is more than third threshold value is more than second time threshold, can therefrom select reference signal strength
Maximum adjacent cell can also therefrom randomly choose an adjacent cell as target information source as target information source, can also be according to
Other rules therefrom select an adjacent cell as target information source.
Wherein, the case where priority of adjacent cell being not more than for the priority of persistent district, if there is multiple adjacent cells
Reference signal strength be more than the 4th threshold value duration be more than third time threshold, can therefrom select reference signal strong
Maximum adjacent cell is spent as target information source, can also therefrom randomly choose an adjacent cell as target information source, it can also be by
Therefrom select an adjacent cell as target information source according to other rules.
Under D2D Discovery scenes, it is assumed that the D2D in D2N IDLE states sends UE（Hereinafter referred to as UE）It resides in
Cell A（Cell A）, the realization method of four selection D2D Discovery transmission resource pools is as follows in the manner described above：
UE execute adjacent cell measurement, can with but be not limited only in CRS, the synchronizing signal etc. for detecting adjacent cell, determine
Detect adjacent cell, such as Cell B.
UE judges whether the priority of Cell A is more than the priority of Cell B according to the precedence information of acquisition.
If the priority of Cell A is more than the priority of Cell B, only when the D2N link CRS signal strengths of Cell B
Compared with the D2N link CRS signal strengths of Cell A be more than third threshold value, and the duration be more than second time threshold when,
The D2D Discovery of Cell B can be just selected to send resource pool, other situations all select the D2D Discovery hairs of Cell A
Send resource pool.
If the priority of Cell A is equal to the priority of Cell B, it is only necessary to consider reference signal strength, i.e. Cell B
D2N link CRS signal strength of the D2N link CRS signal strengths compared to Cell A be more than the 4th threshold value, and the duration is super
When crossing third time threshold, the D2D Discovery of Cell B is selected to send resource pool, other situations select the D2D of C ell A
Discovery sends resource pool.
Preferably, third threshold value is more than the 4th threshold value.
Preferably, the 4th threshold value is identical as the second threshold value value, third time threshold and first time threshold value
It is identical.
The selection mode that D2D under D2D Communication scenes sends resource pool is referred to the above process, here
It repeats no more.
The mode five of selection target information source：
D2D sends UE and judges whether the reference signal strength of persistent district is more than the first threshold value；
If the reference signal strength of persistent district is more than the first threshold value, D2D sends UE and selects persistent district as mesh
Mark information source；
If the reference signal strength of persistent district is not more than the first threshold value, D2D sends UE four choosings in the manner described above
Select target information source.
Under D2D Dicovery scenes, it is assumed that the D2D in D2N IDLE states sends UE（Hereinafter referred to as UE）It resides in
Cell A（Cell A）, the realization method of five selection D2D Dicovery transmission resource pools is as follows in the manner described above：
If the D2N link CRS signal strengths of Cell A（RSRP or RSRQ）More than the first threshold value, UE does not execute adjacent small
Region measurement, selection send resource pool using the corresponding D2D Dicovery of Cell A.Can be D2D Dicovery message needs
When transmission, UE sends selection resource in resource pool from the D2D Dicovery that Cell A are broadcasted and is sent.
With the movement of UE, when the D2N link CRS signal strengths of Cell A are less than or equal to the first threshold value, UE is executed
Adjacent cell measurement, can with but be not limited only to, in CRS, the synchronizing signal etc. for detecting adjacent cell, confirmly detect adjacent cell, example
Such as Cell B.
UE judges whether the priority of Cell A is more than the priority of Cell B according to the precedence information of acquisition.
If the priority of Cell A is more than the priority of Cell B, only when the D2N link CRS signal strengths of Cell B
Compared with the D2N link CRS signal strengths of Cell A be more than third threshold value, and the duration be more than second time threshold when,
The D2D Discovery of Cell B can be just selected to send resource pool, other situations all select the D2D Discovery hairs of Cell A
Send resource pool.
If the priority of Cell A is equal to the priority of Cell B, it is only necessary to consider reference signal strength, i.e. Cell B
D2N link CRS signal strength of the D2N link CRS signal strengths compared to Cell A be more than the 4th threshold value, and the duration is super
When crossing third time threshold, the D2D Discovery of Cell B is selected to send resource pool, other situations select the D2D of C ell A
Discovery sends resource pool.
Preferably, third threshold value is more than the 4th threshold value.
Preferably, the 4th threshold value is identical as the second threshold value value, third time threshold and first time threshold value
It is identical.
The selection mode that D2D under D2D Communication scenes sends resource pool is referred to the above process, here
It repeats no more.
If the information source being able to detect that is persistent district and relaying, the realization method of selection target information source is referred to
The selection mode of each target information source is stated, which is not described herein again.
If the information source being able to detect that is persistent district, adjacent cell and relaying, and the priority phase of adjacent cell and relaying
Together, the realization method of selection target information source is referred to the selection mode of above-mentioned each target information source, and which is not described herein again.
If the information source being able to detect that is persistent district, adjacent cell and relaying, and the priority of adjacent cell is more than relaying
Priority.Aforesaid way one~tri- is referred to when selection target information source.It can also be with reference to above-mentioned side when selection target information source
Formula four, but when the priority of persistent district is more than the priority of adjacent cell, if no adjacent cell meets above-mentioned condition, sentence
It is disconnected whether have the reference signal strength of relaying be more than with the reference signal strength of persistent district compared with the 5th threshold value it is lasting when
Between more than the 4th time threshold relaying, if so, select the relaying as target information source, otherwise, select persistent district as
Target information source；When the priority of persistent district is not more than the priority of adjacent cell, if no adjacent cell meets above-mentioned condition,
The reference signal strength for then judging whether there is relaying is more than holding for the 6th threshold value compared with the reference signal strength of persistent district
The continuous time is more than the relaying of the 5th time threshold, if so, selecting the relaying as target information source, otherwise, selects persistent district
As target information source.It can also be with reference to aforesaid way five when selection target information source.
If the information source being able to detect that is persistent district, adjacent cell and relaying, and the priority relayed is more than adjacent cell
Priority.Aforesaid way one~tri- is referred to when selection target information source.It can also first judge to be resident when selection target information source
Whether the priority of cell is more than the priority of relaying, when the priority of persistent district is more than the priority of relaying, sentences successively
Whether disconnected relaying and adjacent cell meet predetermined condition, preferential that relaying is selected to believe as target if there is relaying meets predetermined condition
Source just selects persistent district as target information source only when relaying and adjacent cell are unsatisfactory for predetermined condition；In persistent district
Priority no more than relaying priority when, judge successively relaying and adjacent cell whether meet predetermined condition, if there is relay
Meet predetermined condition, it is preferential to select relaying as target information source, only when relaying and adjacent cell are unsatisfactory for predetermined condition,
Select persistent district as target information source.Before whether the priority for judging persistent district is more than the priority of relaying, also may be used
First to judge whether the reference signal strength of persistent district is more than the first threshold value, if it is greater than the first threshold value, selection is resident
Otherwise cell judges whether the priority of persistent district is more than the priority of relaying as target information source, and as procedure described above
Selection target information source.
Based on inventive concept same as method, the embodiment of the present invention also provides a kind of D2D transmissions UE, as shown in Fig. 2, packet
It includes：
Target information source selecting module 201, reference signal strength for sending the corresponding information source of resource pool according to D2D and/
Or the priority of information source, selection target information source；
Resource pool selecting module 202 sends resource pool for the corresponding D2D of selection target information source.
An embodiment of the present invention provides the selection schemes that D2D sends resource pool.According to the reference signal strength of information source and/or
The priority etc. of information source is selected, and ensures that D2D sends UE when moving, and suitable D2D can be selected to send resource pool and carried out
The transmission of D2D Discovery/Communication message.
Preferably, target information source selecting module 201 is used for：
The reference signal strength for judging whether there is adjacent cell or relaying meets the first predetermined condition, meets the first predetermined condition
Refer to：Reference signal strength is more than the reference signal strength of persistent district, and difference is super more than the duration of the second threshold value
Cross first time threshold；
If there is adjacent cell or the reference signal strength of relaying meet the first predetermined condition, the adjacent cell or relaying are selected
As target information source；
If meeting the first predetermined condition without adjacent cell or the reference signal strength of relaying, select persistent district as mesh
Mark information source.
Preferably, second threshold value is the corresponding signal strength deviant of D2D resource selections.
Preferably, when the reference signal strength for judging whether there is adjacent cell or relaying meets the first predetermined condition, the mesh
Mark information source selecting module 201 is used for：
Judge whether the reference signal strength of persistent district is more than the first threshold value；
If the reference signal strength of persistent district is more than the first threshold value, the persistent district is selected to believe as target
Source；
If the reference signal strength of persistent district is less than or equal to the first threshold value, adjacent cell or relaying are judged whether there is
Reference signal strength meet the first predetermined condition.
Preferably, the target information source selecting module 201 is used for：
The priority that the corresponding information source of resource pool is sent according to D2D, selects the information source of highest priority as target information source.
Preferably, the information source includes：Persistent district, adjacent cell and relaying.
Preferably, the priority of information source is pre-configured with or persistent district broadcast.
Preferably：The priority of persistent district is more than the priority of adjacent cell, and the priority of adjacent cell is more than the excellent of relaying
First grade；Alternatively, the priority of persistent district is equal to the priority of adjacent cell, it is more than the priority of relaying；Alternatively, persistent district,
Adjacent cell is identical with the priority of relaying.
Preferably, the target information source selecting module 201 is used for：
Judge whether the priority of persistent district is more than the priority of adjacent cell and relaying；
If the priority of persistent district is more than the priority of adjacent cell and relaying, it is full to judge whether there is reference signal strength
The adjacent cell or relaying of the second predetermined condition of foot, if so, then selecting the neighbour that reference signal strength meets the second predetermined condition small
Otherwise area or relaying select persistent district as target information source as target information source；Meeting the second predetermined condition refers to, reference
Signal strength is more than the reference signal strength of persistent district, and difference was more than the second time more than the duration of third threshold value
Threshold value.
If the priority of persistent district is less than or equal to adjacent cell or the priority of relaying, reference signal is judged whether there is
Intensity meets the adjacent cell or relaying of third preset condition, if so, reference signal strength is then selected to meet third preset condition
Adjacent cell or relaying otherwise select persistent district as target information source as target information source.Meeting third preset condition is
Refer to, reference signal strength is more than the reference signal strength of persistent district, and difference is more than more than the duration of the 4th threshold value
Third time threshold.
Preferably, the third threshold value is more than the 4th threshold value.
Preferably, when whether judging the priority of persistent district more than adjacent cell and the priority of relaying, the target letter
Source selecting module 201 is used for：
Judge whether the reference signal strength of persistent district is more than the first threshold value；
If the reference signal strength of persistent district is more than the first threshold value, select persistent district as target information source；
If the reference signal strength of persistent district is less than or equal to the first threshold value, judge that the priority of persistent district is
The no priority more than adjacent cell and relaying.
Preferably, the reference signal of information source includes：Cell reference signals.
Based on inventive concept same as method, the embodiment of the present invention also provides a kind of D2D transmissions UE, as shown in figure 3, packet
Include processor 301 and memory 302.
Processor 301 is configured as executing the computer program with following function：It is corresponding that resource pool is sent according to D2D
The reference signal strength of information source and/or the priority of information source, selection target information source；The corresponding D2D of selection target information source sends money
Source pond；
Memory 302 is configured as the code of storage above computer program.
An embodiment of the present invention provides the selection schemes that D2D sends resource pool.According to the reference signal strength of information source and/or
The priority etc. of information source is selected, and ensures that D2D sends UE when moving, and suitable D2D can be selected to send resource pool and carried out
The transmission of D2D Discovery/Communication message.
It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, the present invention can be used in one or more wherein include computer usable program code computer
Usable storage medium（Including but not limited to magnetic disk storage, CD-ROM, optical memory etc.）The computer program of upper implementation produces
The form of product.
The present invention be with reference to according to the method for the embodiment of the present invention, equipment（System）And the flow of computer program product
Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
Instruct the processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine so that the instruction executed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or
The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (24)
1. a kind of device-to-device D2D sends the selection method of resource pool, which is characterized in that including：
D2D send user equipment according to D2D send the corresponding information source of resource pool reference signal strength and/or information source it is preferential
Grade, selection target information source；
The D2D sends the corresponding D2D of user equipment selection target information source and sends resource pool.
2. according to the method described in claim 1, it is characterized in that, the D2D sends user equipment sends resource pool according to D2D
The reference signal strength of corresponding information source, selection target information source, including：
The D2D sends user equipment and judges whether there is adjacent cell or reference signal strength the first predetermined condition of satisfaction of relaying,
The first predetermined condition of the satisfaction refers to：Reference signal strength is more than the reference signal strength of persistent district, and difference is more than the
The duration of two threshold values is more than first time threshold；
If there is adjacent cell or the reference signal strength of relaying meet the first predetermined condition, the D2D sends user equipment selection
The adjacent cell or relaying are used as target information source；
If meeting the first predetermined condition without adjacent cell or the reference signal strength of relaying, the D2D sends user equipment choosing
Persistent district is selected as target information source.
3. according to the method described in claim 2, it is characterized in that, second threshold value is the corresponding letter of D2D resource selections
Number strength offsets value.
4. according to the method in claim 2 or 3, which is characterized in that the D2D transmissions user equipment judges whether there is adjacent small
The reference signal strength of area or relaying meets the first predetermined condition, including：
The D2D sends user equipment and meets the first predetermined condition in the reference signal strength for judging whether there is adjacent cell or relaying
Before, first judge whether the reference signal strength of persistent district is more than the first threshold value；
If the reference signal strength of persistent district is more than the first threshold value, it is described resident that the D2D sends user equipment selection
Cell is as target information source；
If the reference signal strength of persistent district is less than or equal to the first threshold value, the D2D sends user equipment and judges again
Whether there are adjacent cell or the reference signal strength of relaying to meet the first predetermined condition.
5. according to the method described in claim 1, it is characterized in that, the D2D sends user equipment sends resource pool according to D2D
The priority of corresponding information source, selection target information source, including：
The D2D sends the priority that user equipment sends the corresponding information source of resource pool according to D2D, selects the letter of highest priority
Source is as target information source.
6. according to the method described in claim 1, it is characterized in that, the D2D sends user equipment sends resource pool according to D2D
The reference signal strength of corresponding information source and the priority of information source, selection target information source, including：
The D2D sends user equipment and judges whether the priority of persistent district is more than the priority of adjacent cell and relaying；
If the priority of persistent district is more than the priority of adjacent cell and relaying, the D2D sends user equipment and judges whether
There is reference signal strength to meet the adjacent cell or relaying of the second predetermined condition, if so, then selecting to meet the second predetermined condition
Otherwise adjacent cell or relaying select persistent district as target information source as target information source；Meeting the second predetermined condition refers to：
Reference signal strength is more than the reference signal strength of persistent district, and difference is more than second more than the duration of third threshold value
Time threshold；
If the priority of persistent district is less than or equal to adjacent cell or the priority of relaying, the D2D sends user equipment and sentences
Whether disconnected have the adjacent cell or relaying that reference signal strength meets third predetermined condition, if so, then to meet third predetermined for selection
Otherwise the adjacent cell or relaying of condition select persistent district as target information source as target information source；Meet third predetermined condition
Refer to：Reference signal strength is more than the reference signal strength of persistent district, and difference is super more than the duration of the 4th threshold value
Cross third time threshold.
7. according to the method described in claim 6, it is characterized in that, the third threshold value is more than the 4th threshold value.
8. the method described according to claim 6 or 7, which is characterized in that the D2D sends user equipment and judges persistent district
Whether priority is more than the priority of adjacent cell and relaying, including：
The D2D sends user equipment and judges whether the reference signal strength of persistent district is more than the first threshold value；
If the reference signal strength of persistent district is more than the first threshold value, the D2D sends user equipment and selects persistent district
As target information source；
If the reference signal strength of persistent district is less than or equal to the first threshold value, the D2D sends user equipment judgement and stays
Stay whether the priority of cell is more than the priority of adjacent cell and relaying.
9. according to claims 1 to 3,5~7 any one of them methods, which is characterized in that the reference signal of information source includes：It is small
Area's reference signal.
10. according to claims 1 to 3,5~7 any one of them methods, which is characterized in that the information source includes：It is resident small
Area, adjacent cell and relaying.
11. according to the method described in claim 10, it is characterized in that, the priority of information source is to be pre-configured with or persistent district
Broadcast.
12. according to the method described in claim 10, it is characterized in that：
The priority of persistent district is more than the priority of adjacent cell, and the priority of adjacent cell is more than the priority of relaying；Alternatively,
The priority of persistent district is equal to the priority of adjacent cell, is more than the priority of relaying；Alternatively,
Persistent district, adjacent cell are identical with the priority of relaying.
13. a kind of D2D sends user equipment, which is characterized in that including：
Target information source selecting module, reference signal strength and/or information source for sending the corresponding information source of resource pool according to D2D
Priority, selection target information source；
Resource pool selecting module sends resource pool for the corresponding D2D of selection target information source.
14. D2D according to claim 13 sends user equipment, which is characterized in that the target information source selecting module is used
In：
The reference signal strength for judging whether there is adjacent cell or relaying meets the first predetermined condition, the first predetermined condition of the satisfaction
Refer to：Reference signal strength is more than the reference signal strength of persistent district, and difference is super more than the duration of the second threshold value
Cross first time threshold；
If there is adjacent cell or the reference signal strength of relaying meet the first predetermined condition, select the adjacent cell or relaying as
Target information source；
If meeting first without adjacent cell or the reference signal strength of relaying to impose a condition, persistent district is selected to believe as target
Source.
15. D2D according to claim 14 sends user equipment, which is characterized in that second threshold value is D2D resources
Select corresponding signal strength deviant.
16. D2D according to claims 14 or 15 sends user equipment, which is characterized in that judge whether there is adjacent cell or
When the reference signal strength of relaying meets the first predetermined condition, the target information source selecting module is used for：
Judge whether the reference signal strength of persistent district is more than the first threshold value；
If the reference signal strength of persistent district is more than the first threshold value, select the persistent district as target information source；
If the reference signal strength of persistent district is less than or equal to the first threshold value, adjacent cell or the ginseng of relaying are judged whether there is
It examines signal strength and meets the first predetermined condition.
17. D2D according to claim 13 sends user equipment, which is characterized in that the target information source selecting module is used
In：
The priority that the corresponding information source of resource pool is sent according to D2D, selects the information source of highest priority as target information source.
18. D2D according to claim 13 sends user equipment, which is characterized in that the target information source selecting module is used
In：
Judge whether the priority of persistent district is more than the priority of adjacent cell and relaying；
If the priority of persistent district is more than the priority of adjacent cell and relaying, judges whether there is reference signal strength and meet the
The adjacent cell or relaying of two predetermined conditions, if so, then select reference signal strength meet the second predetermined condition adjacent cell or
Otherwise relaying selects persistent district as target information source as target information source；Meet the instruction of the second predetermined condition：Reference signal
Intensity is more than the reference signal strength of persistent district, and difference is more than the second time threshold more than the duration of third threshold value
Value；
If the priority of persistent district is less than or equal to adjacent cell or the priority of relaying, reference signal strength is judged whether there is
Meet third predetermined condition, if so, then select reference signal strength meet third predetermined condition adjacent cell or relaying as
Otherwise target information source selects persistent district as target information source；It refers to that reference signal strength is more than to meet third predetermined condition
Persistent district reference signal strength, and difference is more than the duration of the 4th threshold value more than third time threshold.
19. D2D according to claim 18 sends user equipment, which is characterized in that the third threshold value is more than described
4th threshold value.
20. the D2D according to claim 18 or 19 sends user equipment, which is characterized in that judge the preferential of persistent district
When whether grade is more than adjacent cell and the priority of relaying, the target information source selecting module is used for：
Judge whether the reference signal strength of persistent district is more than the first threshold value；
If the reference signal strength of persistent district is more than the first threshold value, select persistent district as target information source；
If the reference signal strength of persistent district is less than or equal to the first threshold value, judge whether the priority of persistent district is big
In the priority of adjacent cell and relaying.
21. sending user equipment according to claim 13~15,17~19 any one of them D2D, which is characterized in that information source
Reference signal includes：Cell reference signals.
22. sending user equipment according to claim 13~15,17~19 any one of them D2D, which is characterized in that the letter
Source includes：Persistent district, adjacent cell and relaying.
23. D2D according to claim 22 sends user equipment, which is characterized in that the priority of information source is to be pre-configured with
Or persistent district broadcast.
24. D2D according to claim 22 sends user equipment, it is characterised in that：
The priority of persistent district is more than the priority of adjacent cell, and the priority of adjacent cell is more than the priority of relaying；Alternatively,
The priority of persistent district is equal to the priority of adjacent cell, is more than the priority of relaying；Alternatively,
Persistent district, adjacent cell are identical with the priority of relaying.
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| CN201410097698.3A CN104918330B (en) | 2014-03-14 | 2014-03-14 | A kind of D2D sends the selection method and D2D transmissions UE of resource pool |
| PCT/CN2015/073606 WO2015135431A1 (en) | 2014-03-14 | 2015-03-04 | Method for selecting d2d transmission resource pool and d2d transmission ue |
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| CN201410097698.3A CN104918330B (en) | 2014-03-14 | 2014-03-14 | A kind of D2D sends the selection method and D2D transmissions UE of resource pool |
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| WO2015065110A1 (en) * | 2013-10-31 | 2015-05-07 | 엘지전자(주) | Method for transmitting discovery message in wireless communication system and apparatus for same |
| CN105307234A (en) * | 2015-11-05 | 2016-02-03 | 东莞酷派软件技术有限公司 | Access control method and access control device for remote terminals, terminals and base station |
| CN108370575A (en) * | 2016-01-05 | 2018-08-03 | 富士通株式会社 | Information transferring method, device and system |
| EP3439388A4 (en) * | 2016-04-01 | 2019-10-23 | Fujitsu Limited | Resource allocation method, device, and communication system |
| TWI633803B (en) * | 2016-10-07 | 2018-08-21 | 宏碁股份有限公司 | Method of performing device-to-device communication and related communication system |
| CN111988772A (en) * | 2019-05-23 | 2020-11-24 | 北京邮电大学 | Terminal discovery method and equipment |
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| US8914054B2 (en) * | 2012-03-21 | 2014-12-16 | Telefonaktiebolaget L M Ericsson (Publ) | Dynamic resource selection to reduce interference resulting from direct device to device communications |
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| WO2011124015A1 (en) * | 2010-04-06 | 2011-10-13 | Nokia Corporation | Method and apparatus for managing inter-cell interference for device-to-device communications |
| CN103209492A (en) * | 2011-09-15 | 2013-07-17 | 华为技术有限公司 | Radio resource management method and communication device |
| CN103037450A (en) * | 2011-09-29 | 2013-04-10 | 华为技术有限公司 | Method and device for communication mode switching |
| CN103037448A (en) * | 2011-09-30 | 2013-04-10 | 华为技术有限公司 | Content publishing method and user device |
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