CN105657643A - D2D (Device-to-Device) relaying communication method and device and terminal - Google Patents
D2D (Device-to-Device) relaying communication method and device and terminal Download PDFInfo
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- CN105657643A CN105657643A CN201610013899.XA CN201610013899A CN105657643A CN 105657643 A CN105657643 A CN 105657643A CN 201610013899 A CN201610013899 A CN 201610013899A CN 105657643 A CN105657643 A CN 105657643A
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- trunking traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
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Abstract
The invention provides a D2D relaying communication method and device and a terminal. The D2D relaying communication method comprises steps as follows: obtaining the service cell information of to-be-selected at least one relaying terminal by a remote terminal, wherein the remote terminal is located in a network coverage range and builds an RRC (Radio Resource Control) connection with a base state; and selecting a relaying terminal for D2D relaying communication according to the current service cell information of the remote terminal and the service cell information of the at least one relaying terminal. According to the technical solution provided by the invention, the remote UE is ensured to select the most suitable relaying UE; the vicious circle problem resulted from blindly switching the service cell by the remote UE is avoided; and the problem of coordinating relaying selection and cell switching by the remote UE in a connection state in the D2D relaying communication is effectively solved.
Description
Technical field
The present invention relates to communication technical field, in particular to a kind of method of D2D trunking traffic, the device of a kind of D2D trunking traffic and a kind of terminal.
Background technology
3GPPRelease13 starts to introduce the discussion of part covering scene, and introduce D2D (Device-to-Device, equipment is to equipment, it it is the 3GPPRelease12 direct communication technology of equipment room introduced, realize by introducing secondary link, and up-link and downlink by beehive network system do not realize) concept that relays, namely carry out two or more terminals of D2D communication, what have is positioned at network coverage, and what have is positioned at outside network coverage. Specifically it is illustrated in figure 1 part covering scene schematic diagram, in this schematic diagram, relaying UE (UserEquipment, subscriber equipment) RRC (RadioResourceControl can be set up with base station, wireless heterogeneous networks) connect, base station can be that relaying (relaying) UE configures D2D transmission resource, and far-end (remote) UE then adopts pre-configured resource to communicate with relaying UE. Far-end UE can also be positioned at the network coverage, and in this case, base station directly can configure the D2D communication resource for far-end UE.
At present, the RRC state of RAN2#92 the far-end UE that is not exactly defined in covering. And far-end UE both can in idle (i.e. idle) state, it is also possible at connected state. If far-end UE has reselected a relaying UE, and this relays (being in different Serving cells from far-end UE) when UE is positioned at another Serving cell, if the need of the switching carrying out Serving cell, the far-end UE being in connected state can there is problems in that far-end UE does not carry out the switching of Serving cell, when then current serving BS is far-end UE scheduling D2D transfer resource, need the serving BS with relaying UE to carry out working in coordination with across local resource, and this efficiency consulted across local resource is compared same community and will necessarily be reduced; If carried out the switching of Serving cell, then bring the switching that relay selection is adjoint, and relay switching and may again lead to far-end UE and carry out the switching of Serving cell, and then vicious cycle can be caused.
Therefore, how to be able to ensure that the far-end UE being in connected state chooses suitable relaying UE, it is to avoid far-end UE blindly carries out the switching of Serving cell, it is achieved what far-end UE coordinated the selection of relaying and community is switching to technical problem urgently to be resolved hurrily.
Summary of the invention
The present invention be based on above-mentioned technical problem at least one, it is proposed that the scheme of a kind of new D2D trunking traffic, efficiently solve D2D trunking traffic is in connected state far-end UE coordinate relay selection and community switching problem.
In view of this, according to the first aspect of the invention, it is proposed that a kind of method of D2D trunking traffic, including: be in network coverage and set up the RRC distance terminal being connected with base station and obtain the service cell information of at least one link terminal to be selected; Current service cell information according to described distance terminal and the service cell information of at least one link terminal described, select to carry out the link terminal of D2D trunking traffic.
In this technical scheme, it is in the distance terminal of connected state by obtaining the service cell information of at least one link terminal to be selected, select to carry out the link terminal of D2D trunking traffic with the service cell information of the current service cell information according to distance terminal and at least one link terminal to be selected, make far-end UE continue in selecting UE time (include initial selected relaying UE and follow-up continue in the handover UE time selection again), the service cell information of self and the service cell information of relaying UE to be selected can be considered, to guarantee to choose most suitable relaying UE, as the relaying UE in same Serving cell can be in far-end UE by prioritizing selection, avoid far-end UE and blindly carry out the switching of Serving cell and the vicious cycle problem that causes, efficiently solve the far-end UE being in connected state in D2D trunking traffic and coordinate relay selection and the problem of community switching.
In technique scheme, preferably, current service cell information according to described distance terminal and the service cell information of at least one link terminal described, select to carry out the step of link terminal of D2D trunking traffic, specifically include: judge whether at least one link terminal described exists and be in the object relay terminal of same Serving cell with described distance terminal; When it is determined that the presence of described object relay terminal, described in selecting from described object relay terminal, carry out the link terminal of D2D trunking traffic.
In this technical scheme, by when it is determined that the presence of the object relay terminal being in same Serving cell with distance terminal, from object relay terminal, select to carry out the link terminal of D2D trunking traffic, make far-end UE continue in selecting UE time, can relaying UE in the same Serving cell of prioritizing selection, avoid when selecting the relaying UE in other Serving cell, the problem causing Allocation Efficiency low owing to needing to carry out the resource coordinating of minizone.
In any of the above-described technical scheme, it is preferable that also include: when judging to be absent from described object relay terminal, it may be judged whether RRC can be connected and switch to the Serving cell of arbitrary link terminal at least one link terminal described; If it is determined that RRC can be connected the Serving cell switching to described arbitrary link terminal, then perform the process of network switching, and select described arbitrary link terminal as the described link terminal carrying out D2D trunking traffic.
In this technical scheme, if being absent from above-mentioned target terminal, then far-end UE can be made whether RRC to be connected the Serving cell switching to arbitrary link terminal to be selected, to guarantee to be in same Serving cell with arbitrary link terminal, avoid when selecting the relaying UE being in other Serving cell, the problem causing Allocation Efficiency low owing to needing to carry out the resource coordinating of minizone.
In any of the above-described technical scheme, preferably, also include: if it is determined that RRC can not be connected the Serving cell switching at least one link terminal described, then select the appointment link terminal at least one link terminal described as the described link terminal carrying out D2D trunking traffic, and the Serving cell of the current service cell and described appointment link terminal triggering described distance terminal carries out resource coordinating.
In this technical scheme, if far-end UE judges RRC to be connected the Serving cell switching at least one link terminal to be selected, then can select to specify link terminal as the link terminal carrying out D2D trunking traffic in link terminal to be selected, and the Serving cell specifying link terminal of the Serving cell and selection triggering far-end UE carries out resource coordinating.
Wherein, if being configured with resource coordinating between the Serving cell of distance terminal and the Serving cell specifying link terminal, then can ignore the triggering request that distance terminal sends; If not configuring resource coordinating between the Serving cell of distance terminal and the Serving cell specifying link terminal, then the triggering request that response distance terminal sends, and set up the resource coordinating between two Serving cells at network side.
In any of the above-described technical scheme, it is preferable that obtain the step of the service cell information of at least one link terminal to be selected, specifically include:
The running time-frequency resource that broadcast according to arbitrary link terminal transmission to be selected adopts, determine the information of the Serving cell of described arbitrary link terminal, wherein, described running time-frequency resource is the resource in the repeat broadcast resource pool of the Serving cell of described arbitrary link terminal; And/or
The signal of the secondary link channel of the PCI scrambling of the Serving cell through described arbitrary link terminal according to arbitrary link terminal transmission to be selected, it is determined that the information of the Serving cell of described arbitrary link terminal; And/or
According to the instruction information comprised in the broadcast that arbitrary link terminal to be selected sends, it is determined that the information of the Serving cell of described arbitrary link terminal.
Wherein, the signal of scrambled secondary link channel can be synchronizing signal, reference signal or find signal.
In any of the above-described technical scheme, preferably, also include: when carrying out the link terminal of D2D trunking traffic described in described distance terminal selects first, and/or when carrying out the link terminal of D2D trunking traffic described in described distance terminal needs reselect, perform the step of the described service cell information obtaining at least one link terminal to be selected.
Specifically, above-mentioned technical scheme is applicable not only to the far-end UE scene when initial selected relays UE, is also applied for again selecting relaying UE, i.e. scene during switching relaying UE.
According to the second aspect of the invention, it is also proposed that the device of a kind of D2D trunking traffic, including: acquiring unit, for obtaining the service cell information of at least one link terminal to be selected; Processing unit, for according to being in network coverage and set up with base station the current service cell information of the RRC distance terminal being connected and the service cell information of at least one link terminal described, selecting to carry out the link terminal of D2D trunking traffic.
In this technical scheme, it is in the distance terminal of connected state by obtaining the service cell information of at least one link terminal to be selected, select to carry out the link terminal of D2D trunking traffic with the service cell information of the current service cell information according to distance terminal and at least one link terminal to be selected, make far-end UE continue in selecting UE time (include initial selected relaying UE and follow-up continue in the handover UE time selection again), the service cell information of self and the service cell information of relaying UE to be selected can be considered, to guarantee to choose most suitable relaying UE, as the relaying UE in same Serving cell can be in far-end UE by prioritizing selection, avoid far-end UE and blindly carry out the switching of Serving cell and the vicious cycle problem that causes, efficiently solve the far-end UE being in connected state in D2D trunking traffic and coordinate relay selection and the problem of community switching.
In technique scheme, it is preferable that described processing unit includes: the first judging unit, it is in the object relay terminal of same Serving cell for judging whether at least one link terminal described exists with described distance terminal; Select unit, for when described first judging unit it is determined that the presence of described object relay terminal, carrying out the link terminal of D2D trunking traffic described in selecting from described object relay terminal.
In this technical scheme, by when it is determined that the presence of the object relay terminal being in same Serving cell with distance terminal, from object relay terminal, select to carry out the link terminal of D2D trunking traffic, make far-end UE continue in selecting UE time, can relaying UE in the same Serving cell of prioritizing selection, avoid when selecting the relaying UE in other Serving cell, the problem causing Allocation Efficiency low owing to needing to carry out the resource coordinating of minizone.
In any of the above-described technical scheme, preferably, described processing unit also includes: the second judging unit, for when described first judging unit judges to be absent from described object relay terminal, it may be judged whether RRC can be connected and switch to the Serving cell of arbitrary link terminal at least one link terminal described; Network switch unit, for when described second judging unit judges RRC to be connected the Serving cell switching to described arbitrary link terminal, performing the process of network switching; Described selection unit is additionally operable to, and when described second judging unit judges RRC to be connected the Serving cell switching to described arbitrary link terminal, selects described arbitrary link terminal as the described link terminal carrying out D2D trunking traffic.
In this technical scheme, if being absent from above-mentioned target terminal, then far-end UE can be made whether RRC to be connected the Serving cell switching to arbitrary link terminal to be selected, to guarantee to be in same Serving cell with arbitrary link terminal, avoid when selecting the relaying UE being in other Serving cell, the problem causing Allocation Efficiency low owing to needing to carry out the resource coordinating of minizone.
In any of the above-described technical scheme, preferably, described selection unit is additionally operable to, when RRC can not be connected the Serving cell that switch at least one link terminal described by described second judging unit judgement, select the appointment link terminal at least one link terminal described as the described link terminal carrying out D2D trunking traffic;
Described processing unit also includes: trigger element, for when specifying link terminal as the described link terminal carrying out D2D trunking traffic described in described selection Unit selection, the Serving cell of the current service cell and described appointment link terminal of triggering described distance terminal carries out resource coordinating.
In this technical scheme, if far-end UE judges RRC to be connected the Serving cell switching at least one link terminal to be selected, then can select to specify link terminal as the link terminal carrying out D2D trunking traffic in link terminal to be selected, and the Serving cell specifying link terminal of the Serving cell and selection triggering far-end UE carries out resource coordinating.
Wherein, if being configured with resource coordinating between the Serving cell of distance terminal and the Serving cell specifying link terminal, then can ignore the triggering request that distance terminal sends; If not configuring resource coordinating between the Serving cell of distance terminal and the Serving cell specifying link terminal, then the triggering request that response distance terminal sends, and set up the resource coordinating between two Serving cells at network side.
In any of the above-described technical scheme, it is preferable that described acquiring unit specifically for:
The running time-frequency resource that broadcast according to arbitrary link terminal transmission to be selected adopts, determine the information of the Serving cell of described arbitrary link terminal, wherein, described running time-frequency resource is the resource in the repeat broadcast resource pool of the Serving cell of described arbitrary link terminal;And/or
The signal of the secondary link channel of the PCI scrambling of the Serving cell through described arbitrary link terminal according to arbitrary link terminal transmission to be selected, it is determined that the information of the Serving cell of described arbitrary link terminal; And/or
According to the instruction information comprised in the broadcast that arbitrary link terminal to be selected sends, it is determined that the information of the Serving cell of described arbitrary link terminal.
Wherein, the signal of scrambled secondary link channel can be synchronizing signal, reference signal or find signal.
In any of the above-described technical scheme, preferably, described acquiring unit specifically for: when carrying out the link terminal of D2D trunking traffic described in described distance terminal selects first, and/or when carrying out the link terminal of D2D trunking traffic described in described distance terminal needs reselect, perform the operation of the described service cell information obtaining at least one link terminal to be selected.
Specifically, above-mentioned technical scheme is applicable not only to the far-end UE scene when initial selected relays UE, is also applied for again selecting relaying UE, i.e. scene during switching relaying UE.
According to the third aspect of the invention we, it is also proposed that a kind of terminal, including the device of the D2D trunking traffic as described in above-mentioned any one technical scheme.
By above technical scheme, may insure that far-end UE chooses most suitable relaying UE, avoid far-end UE and blindly carry out the switching of Serving cell and the vicious cycle problem that causes, efficiently solve the far-end UE being in connected state in D2D trunking traffic and coordinate relay selection and the problem of community switching.
Accompanying drawing explanation
Fig. 1 illustrates the schematic diagram of part covering scene in D2D communication;
Fig. 2 illustrates the schematic flow diagram of the method for D2D trunking traffic according to an embodiment of the invention;
Fig. 3 illustrates the schematic block diagram of the device of D2D trunking traffic according to an embodiment of the invention;
Fig. 4 illustrates the schematic block diagram of terminal according to an embodiment of the invention;
Fig. 5 illustrates the schematic flow diagram of the method for D2D trunking traffic according to another embodiment of the invention.
Detailed description of the invention
In order to be more clearly understood that the above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail. It should be noted that when not conflicting, embodiments herein and the feature in embodiment can be mutually combined.
Elaborate a lot of detail in the following description so that fully understanding the present invention; but; the present invention can also adopt other to be different from other modes described here to implement, and therefore, protection scope of the present invention is by the restriction of following public specific embodiment.
Fig. 2 illustrates the schematic flow diagram of the method for D2D trunking traffic according to an embodiment of the invention.
As in figure 2 it is shown, the method for D2D trunking traffic according to an embodiment of the invention, including:
Step 202, is in network coverage and sets up the RRC distance terminal being connected with base station and obtain the service cell information of at least one link terminal to be selected;
Step 204, the service cell information according to the current service cell information of described distance terminal and at least one link terminal described, select to carry out the link terminal of D2D trunking traffic.
In this technical scheme, it is in the distance terminal of connected state by obtaining the service cell information of at least one link terminal to be selected, select to carry out the link terminal of D2D trunking traffic with the service cell information of the current service cell information according to distance terminal and at least one link terminal to be selected, make far-end UE continue in selecting UE time (include initial selected relaying UE and follow-up continue in the handover UE time selection again), the service cell information of self and the service cell information of relaying UE to be selected can be considered, to guarantee to choose most suitable relaying UE, as the relaying UE in same Serving cell can be in far-end UE by prioritizing selection, avoid far-end UE and blindly carry out the switching of Serving cell and the vicious cycle problem that causes, efficiently solve the far-end UE being in connected state in D2D trunking traffic and coordinate relay selection and the problem of community switching.
In technique scheme, preferably, current service cell information according to described distance terminal and the service cell information of at least one link terminal described, select to carry out the step of link terminal of D2D trunking traffic, specifically include: judge whether at least one link terminal described exists and be in the object relay terminal of same Serving cell with described distance terminal; When it is determined that the presence of described object relay terminal, described in selecting from described object relay terminal, carry out the link terminal of D2D trunking traffic.
In this technical scheme, by when it is determined that the presence of the object relay terminal being in same Serving cell with distance terminal, from object relay terminal, select to carry out the link terminal of D2D trunking traffic, make far-end UE continue in selecting UE time, can relaying UE in the same Serving cell of prioritizing selection, avoid when selecting the relaying UE in other Serving cell, the problem causing Allocation Efficiency low owing to needing to carry out the resource coordinating of minizone.
In any of the above-described technical scheme, it is preferable that also include: when judging to be absent from described object relay terminal, it may be judged whether RRC can be connected and switch to the Serving cell of arbitrary link terminal at least one link terminal described; If it is determined that RRC can be connected the Serving cell switching to described arbitrary link terminal, then perform the process of network switching, and select described arbitrary link terminal as the described link terminal carrying out D2D trunking traffic.
In this technical scheme, if being absent from above-mentioned target terminal, then far-end UE can be made whether RRC to be connected the Serving cell switching to arbitrary link terminal to be selected, to guarantee to be in same Serving cell with arbitrary link terminal, avoid when selecting the relaying UE being in other Serving cell, the problem causing Allocation Efficiency low owing to needing to carry out the resource coordinating of minizone.
In any of the above-described technical scheme, preferably, also include: if it is determined that RRC can not be connected the Serving cell switching at least one link terminal described, then select the appointment link terminal at least one link terminal described as the described link terminal carrying out D2D trunking traffic, and the Serving cell of the current service cell and described appointment link terminal triggering described distance terminal carries out resource coordinating.
In this technical scheme, if far-end UE judges RRC to be connected the Serving cell switching at least one link terminal to be selected, then can select to specify link terminal as the link terminal carrying out D2D trunking traffic in link terminal to be selected, and the Serving cell specifying link terminal of the Serving cell and selection triggering far-end UE carries out resource coordinating.
Wherein, if being configured with resource coordinating between the Serving cell of distance terminal and the Serving cell specifying link terminal, then can ignore the triggering request that distance terminal sends; If not configuring resource coordinating between the Serving cell of distance terminal and the Serving cell specifying link terminal, then the triggering request that response distance terminal sends, and set up the resource coordinating between two Serving cells at network side.
In any of the above-described technical scheme, it is preferable that obtain the step of the service cell information of at least one link terminal to be selected, specifically include:
The running time-frequency resource that broadcast according to arbitrary link terminal transmission to be selected adopts, determine the information of the Serving cell of described arbitrary link terminal, wherein, described running time-frequency resource is the resource in the repeat broadcast resource pool of the Serving cell of described arbitrary link terminal; And/or
The signal of the secondary link channel of the PCI scrambling of the Serving cell through described arbitrary link terminal according to arbitrary link terminal transmission to be selected, it is determined that the information of the Serving cell of described arbitrary link terminal;And/or
According to the instruction information comprised in the broadcast that arbitrary link terminal to be selected sends, it is determined that the information of the Serving cell of described arbitrary link terminal.
Wherein, the signal of scrambled secondary link channel can be synchronizing signal, reference signal or find signal.
In any of the above-described technical scheme, preferably, also include: when carrying out the link terminal of D2D trunking traffic described in described distance terminal selects first, and/or when carrying out the link terminal of D2D trunking traffic described in described distance terminal needs reselect, perform the step of the described service cell information obtaining at least one link terminal to be selected.
Specifically, above-mentioned technical scheme is applicable not only to the far-end UE scene when initial selected relays UE, is also applied for again selecting relaying UE, i.e. scene during switching relaying UE.
Fig. 3 illustrates the schematic block diagram of the device of D2D trunking traffic according to an embodiment of the invention.
As it is shown on figure 3, the device 300 of D2D trunking traffic according to an embodiment of the invention, including: acquiring unit 302 and processing unit 304.
Wherein, acquiring unit 302, for obtaining the service cell information of at least one link terminal to be selected; Processing unit 304, for according to being in network coverage and set up with base station the current service cell information of the RRC distance terminal being connected and the service cell information of at least one link terminal described, selecting to carry out the link terminal of D2D trunking traffic.
In this technical scheme, it is in the distance terminal of connected state by obtaining the service cell information of at least one link terminal to be selected, select to carry out the link terminal of D2D trunking traffic with the service cell information of the current service cell information according to distance terminal and at least one link terminal to be selected, make far-end UE continue in selecting UE time (include initial selected relaying UE and follow-up continue in the handover UE time selection again), the service cell information of self and the service cell information of relaying UE to be selected can be considered, to guarantee to choose most suitable relaying UE, as the relaying UE in same Serving cell can be in far-end UE by prioritizing selection, avoid far-end UE and blindly carry out the switching of Serving cell and the vicious cycle problem that causes, efficiently solve the far-end UE being in connected state in D2D trunking traffic and coordinate relay selection and the problem of community switching.
In technique scheme, it is preferable that described processing unit 304 includes: the first judging unit 304A, it is in the object relay terminal of same Serving cell for judging whether at least one link terminal described exists with described distance terminal; Select unit 304B, for when described first judging unit 304A it is determined that the presence of described object relay terminal, carrying out the link terminal of D2D trunking traffic described in selecting from described object relay terminal.
In this technical scheme, by when it is determined that the presence of the object relay terminal being in same Serving cell with distance terminal, from object relay terminal, select to carry out the link terminal of D2D trunking traffic, make far-end UE continue in selecting UE time, can relaying UE in the same Serving cell of prioritizing selection, avoid when selecting the relaying UE in other Serving cell, the problem causing Allocation Efficiency low owing to needing to carry out the resource coordinating of minizone.
In any of the above-described technical scheme, preferably, described processing unit 304 also includes: the second judging unit 304C, for when described first judging unit 304A judges to be absent from described object relay terminal, it may be judged whether RRC can be connected and switch to the Serving cell of arbitrary link terminal at least one link terminal described;Network switch unit 304D, for when described second judging unit 304C judges RRC to be connected the Serving cell switching to described arbitrary link terminal, performing the process of network switching; Described selection unit 304B is additionally operable to, and when described second judging unit 304C judges RRC to be connected the Serving cell switching to described arbitrary link terminal, selects described arbitrary link terminal as the described link terminal carrying out D2D trunking traffic.
In this technical scheme, if being absent from above-mentioned target terminal, then far-end UE can be made whether RRC to be connected the Serving cell switching to arbitrary link terminal to be selected, to guarantee to be in same Serving cell with arbitrary link terminal, avoid when selecting the relaying UE being in other Serving cell, the problem causing Allocation Efficiency low owing to needing to carry out the resource coordinating of minizone.
In any of the above-described technical scheme, preferably, described selection unit 304B is additionally operable to, when RRC can not be connected the Serving cell that switch at least one link terminal described by described second judging unit 304C judgement, select the appointment link terminal at least one link terminal described as the described link terminal carrying out D2D trunking traffic;
Described processing unit 304 also includes: trigger element 304E, for when described selection unit 304B selects described appointment link terminal as the described link terminal carrying out D2D trunking traffic, the Serving cell of the current service cell and described appointment link terminal of triggering described distance terminal carries out resource coordinating.
In this technical scheme, if far-end UE judges RRC to be connected the Serving cell switching at least one link terminal to be selected, then can select to specify link terminal as the link terminal carrying out D2D trunking traffic in link terminal to be selected, and the Serving cell specifying link terminal of the Serving cell and selection triggering far-end UE carries out resource coordinating.
Wherein, if being configured with resource coordinating between the Serving cell of distance terminal and the Serving cell specifying link terminal, then can ignore the triggering request that distance terminal sends; If not configuring resource coordinating between the Serving cell of distance terminal and the Serving cell specifying link terminal, then the triggering request that response distance terminal sends, and set up the resource coordinating between two Serving cells at network side.
In any of the above-described technical scheme, it is preferable that described acquiring unit 302 specifically for:
The running time-frequency resource that broadcast according to arbitrary link terminal transmission to be selected adopts, determine the information of the Serving cell of described arbitrary link terminal, wherein, described running time-frequency resource is the resource in the repeat broadcast resource pool of the Serving cell of described arbitrary link terminal; And/or
The signal of the secondary link channel of the PCI scrambling of the Serving cell through described arbitrary link terminal according to arbitrary link terminal transmission to be selected, it is determined that the information of the Serving cell of described arbitrary link terminal; And/or
According to the instruction information comprised in the broadcast that arbitrary link terminal to be selected sends, it is determined that the information of the Serving cell of described arbitrary link terminal.
Wherein, the signal of scrambled secondary link channel can be synchronizing signal, reference signal or find signal.
In any of the above-described technical scheme, preferably, described acquiring unit 302 specifically for: when carrying out the link terminal of D2D trunking traffic described in described distance terminal selects first, and/or when carrying out the link terminal of D2D trunking traffic described in described distance terminal needs reselect, perform the operation of the described service cell information obtaining at least one link terminal to be selected.
Specifically, above-mentioned technical scheme is applicable not only to the far-end UE scene when initial selected relays UE, is also applied for again selecting relaying UE, i.e. scene during switching relaying UE.
Fig. 4 illustrates the schematic block diagram of terminal according to an embodiment of the invention.
As shown in Figure 4, terminal 400 according to an embodiment of the invention, including: the device 300 of D2D trunking traffic as shown in Figure 3.
In sum, the present invention mainly solves to be in D2D trunking traffic how the far-end UE of connected state coordinates relay selection and the problem of community switching, specifically, for far-end UE:
Firstly the need of the service cell information getting relaying UE to be selected. Wherein, acquisition process mainly includes following three kinds of modes:
Mode one: relaying UE indicates service cell information by broadcast with explicit information, and then far-end UE obtains the service cell information of relaying UE according to the broadcast of relaying UE.
Mode two: relaying UE sends message by the physical layer running time-frequency resource adopted in the repeat broadcast resource pool of residing community, and then far-end UE can determine the service cell information of relaying UE according to the relaying UE running time-frequency resource used. Such as: community A use resource pool be X, community B use resource pool be Y, community C use resource pool be Z, if a relaying UE is in the B of community, then this relaying UE uses the resource in resource pool Y to send message, and then far-end UE can determine the service cell information of this relaying UE according to the resource that this relaying UE transmission message uses.
Mode three: relaying UE sends the PCI (PhysicalCellIdentifier using Serving cell, Physical Cell Identifier) synchronizing signal of scrambling pair link channel, reference signal or find signal, and then far-end UE receive synchronizing signal, reference signal or find signal time get relaying UE service cell information.
Far-end UE is after getting the service cell information of relaying UE to be selected, during the selection of the underway UE that continues, it is possible to have following operation:
If 1 has multiple relaying UE to wait to select, then prioritizing selection is in the relaying UE under same Serving cell, it means that add a kind of relaying UE selection criterion, namely whether under same Serving cell.
2, available if not in the relaying UE under same Serving cell, it is determined whether to allow hand over to the Serving cell of relaying UE, if can switch, then switch over, in order to be under same community with relaying UE; If (namely far-end UE is not in the coverage of the Serving cell of the relaying UE selected) cannot be switched, then trigger and carry out resource coordinating between current serving BS and the serving BS relaying UE of selection.
Wherein, network side has been configured with the community of resource coordinating for, this triggering request can be ignored in base station; Network side is not yet configured the community of resource coordinating for, base station needs to respond this triggering request, and sets up this collaborative at network side, in order to expeditiously the resource of relaying UE and far-end UE is scheduling.
Said process is as it is shown in figure 5, include:
Step 502, the far-end UE being in connected state obtains the service cell information of relaying UE to be selected.
Step 504, the far-end UE being in connected state needs to select relaying UE.
It should be noted that step 502 can also be after step 504 or simultaneous.
Step 506, far-end UE determines whether to be in the relaying UE of same Serving cell according to the service cell information of current service cell information and relaying UE, if having, then performs step 508;Otherwise, step 510 is performed.
Step 508, selects to be in the relaying UE of same Serving cell.
Step 510, far-end UE judges whether the Serving cell allowed hand over to arbitrary relaying UE, if so, then performs step 512; Otherwise, step 514 is performed.
Step 512, switches to the Serving cell of this arbitrary relaying UE, and selects this arbitrary relaying UE.
Step 514, the Serving cell specifying relaying UE of the Serving cell and selection that trigger far-end UE is worked in coordination with.
The problem that the technique scheme of the present invention can solve to be in the network switching of the UE of connected state and relay selection in D2D trunking traffic.
Technical scheme is described in detail above in association with accompanying drawing, the present invention proposes the scheme of a kind of new D2D trunking traffic, may insure that far-end UE chooses most suitable relaying UE, avoid far-end UE and blindly carry out the switching of Serving cell and the vicious cycle problem that causes, efficiently solve the far-end UE being in connected state in D2D trunking traffic and coordinate relay selection and the problem of community switching.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations. All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (13)
1. the method for a D2D trunking traffic, it is characterised in that including:
It is in network coverage and sets up the RRC distance terminal being connected with base station and obtain the service cell information of at least one link terminal to be selected;
Current service cell information according to described distance terminal and the service cell information of at least one link terminal described, select to carry out the link terminal of D2D trunking traffic.
2. the method for D2D trunking traffic according to claim 1, it is characterized in that, current service cell information according to described distance terminal and the service cell information of at least one link terminal described, select to carry out the step of the link terminal of D2D trunking traffic, specifically include:
Judge whether at least one link terminal described exists and be in the object relay terminal of same Serving cell with described distance terminal;
When it is determined that the presence of described object relay terminal, described in selecting from described object relay terminal, carry out the link terminal of D2D trunking traffic.
3. the method for D2D trunking traffic according to claim 2, it is characterised in that also include:
When judging to be absent from described object relay terminal, it may be judged whether RRC can be connected and switch to the Serving cell of arbitrary link terminal at least one link terminal described;
If it is determined that RRC can be connected the Serving cell switching to described arbitrary link terminal, then perform the process of network switching, and select described arbitrary link terminal as the described link terminal carrying out D2D trunking traffic.
4. the method for D2D trunking traffic according to claim 3, it is characterised in that also include:
If it is determined that RRC can not be connected the Serving cell switching at least one link terminal described, then select the appointment link terminal at least one link terminal described as the described link terminal carrying out D2D trunking traffic, and the Serving cell of the current service cell and described appointment link terminal triggering described distance terminal carries out resource coordinating.
5. the method for D2D trunking traffic according to any one of claim 1 to 4, it is characterised in that obtain the step of the service cell information of at least one link terminal to be selected, specifically include:
The running time-frequency resource that broadcast according to arbitrary link terminal transmission to be selected adopts, determine the information of the Serving cell of described arbitrary link terminal, wherein, described running time-frequency resource is the resource in the repeat broadcast resource pool of the Serving cell of described arbitrary link terminal;And/or
The signal of the secondary link channel of the PCI scrambling of the Serving cell through described arbitrary link terminal according to arbitrary link terminal transmission to be selected, it is determined that the information of the Serving cell of described arbitrary link terminal; And/or
According to the instruction information comprised in the broadcast that arbitrary link terminal to be selected sends, it is determined that the information of the Serving cell of described arbitrary link terminal.
6. the method for D2D trunking traffic according to any one of claim 1 to 4, it is characterised in that also include:
When carrying out the link terminal of D2D trunking traffic described in described distance terminal selects first, and/or when carrying out the link terminal of D2D trunking traffic described in described distance terminal needs reselect, perform the step of the described service cell information obtaining at least one link terminal to be selected.
7. the device of a D2D trunking traffic, it is characterised in that including:
Acquiring unit, for obtaining the service cell information of at least one link terminal to be selected;
Processing unit, for according to being in network coverage and set up with base station the current service cell information of the RRC distance terminal being connected and the service cell information of at least one link terminal described, selecting to carry out the link terminal of D2D trunking traffic.
8. the device of D2D trunking traffic according to claim 7, it is characterised in that described processing unit includes:
First judging unit, is in the object relay terminal of same Serving cell for judging whether to exist at least one link terminal described with described distance terminal;
Select unit, for when described first judging unit it is determined that the presence of described object relay terminal, carrying out the link terminal of D2D trunking traffic described in selecting from described object relay terminal.
9. the device of D2D trunking traffic according to claim 8, it is characterised in that described processing unit also includes:
Second judging unit, for when described first judging unit judges to be absent from described object relay terminal, it may be judged whether can be connected by RRC and switch to the Serving cell of arbitrary link terminal at least one link terminal described;
Network switch unit, for when described second judging unit judges RRC to be connected the Serving cell switching to described arbitrary link terminal, performing the process of network switching;
Described selection unit is additionally operable to, and when described second judging unit judges RRC to be connected the Serving cell switching to described arbitrary link terminal, selects described arbitrary link terminal as the described link terminal carrying out D2D trunking traffic.
10. the device of D2D trunking traffic according to claim 9, it is characterised in that:
Described selection unit is additionally operable to, when RRC can not be connected the Serving cell that switch at least one link terminal described by described second judging unit judgement, select the appointment link terminal at least one link terminal described as the described link terminal carrying out D2D trunking traffic;
Described processing unit also includes:
Trigger element, for when specifying link terminal as the described link terminal carrying out D2D trunking traffic described in described selection Unit selection, the Serving cell of the current service cell and described appointment link terminal of triggering described distance terminal carries out resource coordinating.
11. the device of the D2D trunking traffic according to any one of claim 7 to 10, it is characterised in that described acquiring unit specifically for:
The running time-frequency resource that broadcast according to arbitrary link terminal transmission to be selected adopts, determine the information of the Serving cell of described arbitrary link terminal, wherein, described running time-frequency resource is the resource in the repeat broadcast resource pool of the Serving cell of described arbitrary link terminal;And/or
The signal of the secondary link channel of the PCI scrambling of the Serving cell through described arbitrary link terminal according to arbitrary link terminal transmission to be selected, it is determined that the information of the Serving cell of described arbitrary link terminal; And/or
According to the instruction information comprised in the broadcast that arbitrary link terminal to be selected sends, it is determined that the information of the Serving cell of described arbitrary link terminal.
12. the device of the D2D trunking traffic according to any one of claim 7 to 10, it is characterised in that described acquiring unit specifically for:
When carrying out the link terminal of D2D trunking traffic described in described distance terminal selects first, and/or when carrying out the link terminal of D2D trunking traffic described in described distance terminal needs reselect, perform the operation of the described service cell information obtaining at least one link terminal to be selected.
13. a terminal, it is characterised in that including: the device of the D2D trunking traffic as according to any one of claim 7 to 12.
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| CN201610013899.XA CN105657643B (en) | 2016-01-07 | 2016-01-07 | The method, apparatus and terminal of D2D relayed communications |
| PCT/CN2016/087399 WO2017117925A1 (en) | 2016-01-07 | 2016-06-28 | D2d relay communication method, device and terminal |
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| CN201610013899.XA CN105657643B (en) | 2016-01-07 | 2016-01-07 | The method, apparatus and terminal of D2D relayed communications |
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| WO2017117925A1 (en) | 2017-07-13 |
| CN105657643B (en) | 2019-03-08 |
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