CN105992298A - D2D communication relay node selection method - Google Patents
D2D communication relay node selection method Download PDFInfo
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- CN105992298A CN105992298A CN201510053446.5A CN201510053446A CN105992298A CN 105992298 A CN105992298 A CN 105992298A CN 201510053446 A CN201510053446 A CN 201510053446A CN 105992298 A CN105992298 A CN 105992298A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The present invention provides a D2D communication relay node selection method. The method comprises: if the D2D UE satisfies a condition 1, the D2D UE becomes an alternative D2D relay node, wherein the condition 1 includes a capacity of communication with eNB in a network covering range and a capacity of undertaking the relay task; the alternative D2D relay node obtains the D2D UE information out of the network covering range, and it is determined whether a request of becoming a D2D relay node to the eNB or not according to the self condition; and if the request obtains the permission of the eNB, and the alternative D2D relay node becomes a D2D relay node and broadcasts and forwards the information related to the eNB. The D2D communication relay node selection method can allow the UE incapable of receiving eNB signals to connect with the network through relay D2D nodes so as to obtain the effect of enlarging the network covering range.
Description
Technical field
The present invention relates to wireless communication field, particularly relate to the side of the trunk node selection of a kind of D2D communication
Method.
Background technology
In traditional cellular network, the communication of any terminal room must complete with core net via base station, logical
Cross centralized scheduling of resource and realize interference control.But when communicating pair UE is close together, centralized tune
Degree will result in the poor efficiency of frequency spectrum resource.Along with the development of communication network, frequency spectrum resource presents nervous trend,
The demand of localization business is growing；Meanwhile, public safety field needs communication in reliability and peace
Full property aspect exists and ensures, when network paralysis or covering are unsatisfactory for requiring, terminal room possesses and should directly communicate
Function.Under this present situation, phase has been carried out in terminal direct connection (Device to Device, D2D) direction by 3GPP
Close research.D2D belongs to distributed system, uses the UE (User Equipment) of D2D technology permissible
Not via base station and core net, other user directly and in UE communication range carries out data communication.
D2D technology can combine with relay forwarding technology, and the source node in communication introduces in destination node
D2D relays UE, to realize the lifting of communication performance.When communicating pair is eNB and UE, relaying
The use of D2D UE is referred to as UE-to-Network Relay, contributes to strengthening communication quality, and when communication
When UE is in outside network coverage, network coverage can be expanded, make to receive eNB signal
UE can by relaying D2D UE be connected to network；When communicating pair is the D2D UE (network coverage
In the range of or network coverage outer) time, the use of relaying D2D UE is referred to as UE-to-UE Relay, can
Make mobile terminal remain to the D2D multi-hop between realizing relatively at a distance in the case of maximum transmission power is relatively low to lead to
Letter.
Trunking traffic research based on D2D technology is concentrated mainly on communicating pair node is in net at present
In network coverage, or the scene that communicating pair is eNB and network coverage interior nodes, not yet relate to
For expanding the D2D relaying technique of network coverage.
Summary of the invention
In order to solve the problems referred to above, the present invention proposes the method for the trunk node selection of a kind of D2D communication,
Including: if D2D UE meets condition 1, become alternative D2D via node；Described condition 1 includes:
There is in network coverage the ability communicated with eNB and there is the ability undertaking relay task；
Described alternative D2D via node obtains the outer D2D UE information of network coverage, determines according to own situation
Determine whether to become the request of D2D via node to eNB transmission；If described request obtains the permission of eNB,
The most described alternative D2D via node becomes D2D via node, and broadcasts the relevant information forwarding eNB.
Preferably, the factor of judgment described in the ability undertaking relay task at least includes: described alternative
The operation of relays of D2D via node does not affect itself and the communication of UE in described eNB and other net；Enter one
Step also includes: the dump energy of described alternative D2D via node and the link-quality with described eNB.
Preferably, described alternative D2D via node is configured to UE outer to network coverage by described eNB
Carry out D2D discovery, or described alternative D2D via node self selects UE outer to network coverage to enter
Row D2D finds；The outer D2D UE information of described network coverage is by UE outer to network coverage
Carry out D2D to find to obtain.
Or, the message that the outer D2D UE information of described network coverage sends from the outer D2D UE of net,
D2D UE described in described message declaration is in outside network coverage and wishes described alternative D2D relaying joint
Point is as via node.Further, also outer to the described net D2D UE of described alternative D2D via node
The message sent carries out response.After described alternative D2D via node is allowed to become D2D via node,
Communication for the outer D2D UE of described net to network carries out relaying and applying for resource.
Preferably, described alternative D2D via node becomes in the request of D2D via node to what eNB sent
Also carrying the identity of the outer D2D UE of described net, the approach of described request includes that RRC connects.
Preferably, described eNB allows the basis for estimation of described request to include:
The position of existing each D2D via node and offered load；
Ask to become position and the offered load of each alternative D2D via node of D2D via node；
Whether existing D2D via node and request become the alternative D2D via node of D2D via node
Exist for the node that the outer D2D UE of described network coverage carries out relaying；
Send the offered load of the alternative D2D via node of described request；
The interference of the alternative D2D via node self and the interior neighbours UE of net thereof that send described request controls.
Preferably, described eNB is connected by RRC or SIB broadcast replies whether allow described alternative D2D
The request of via node, and use single via node communication pattern or multiple relay node cooperation diversity communication
Pattern.
The method that the present invention proposes can make the UE that cannot receive eNB signal by relaying D2D node
It is connected to network, thus obtains the effect expanding network coverage.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement
In example or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, retouch below
Accompanying drawing in stating is some embodiments of the present invention, for those of ordinary skill in the art, is not paying
On the premise of creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the communication scenes schematic diagram of present example 1；
Fig. 2 is the process flow block diagram of the embodiment of the present invention 1；
Fig. 3 is the communication scenes schematic diagram of present example 2；
Fig. 4 is the process flow block diagram of the embodiment of the present invention 2.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the present invention
Accompanying drawing in embodiment, is clearly and completely described the technical scheme in the embodiment of the present invention, it is clear that
Described embodiment is a part of embodiment of the present invention rather than whole embodiments；It should be noted that
In the case of not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined.Based on
Embodiment in the present invention, those of ordinary skill in the art are obtained under not making creative work premise
Every other embodiment, broadly fall into the scope of protection of the invention.
The method of the trunk node selection of the D2D communication that the present invention proposes, including: if D2D UE meets
Condition 1 then becomes alternative D2D via node；Its conditional 1 includes: have in network coverage
The ability that communicates with eNB and there is the ability undertaking relay task；Described alternative D2D via node
Obtain the outer D2D UE information of network coverage, decide whether to send to eNB to become according to own situation
D2D via node is asked；If described request obtains the permission of eNB, the most described alternative D2D relays joint
Point becomes D2D via node, and broadcasts the relevant information forwarding eNB.
In above-mentioned method, the factor of judgment with the ability undertaking relay task at least includes: described alternative
The operation of relays of D2D via node does not affect itself and the communication of UE in described eNB and other net；Enter one
Step can also include described alternative D2D via node dump energy and with the link-quality of described eNB.
Outside alternative D2D via node in above-mentioned method is configured to network coverage by described eNB
UE carries out D2D discovery, or described alternative D2D via node self selects UE outer to network coverage
Carry out D2D discovery；Further, the outer D2D UE information of described network coverage is by covering network
The outer UE of lid scope carries out D2D and finds to obtain.
Additionally, the outer D2D UE information of described network coverage can be from netting what outer D2D UE sent
Message, described message can be stated that described D2D UE is in outside network coverage, and wish described standby
Select D2D via node as via node.Further, described alternative D2D via node can also be right
The message that the outer D2D UE of described net sends carries out response.Further, described alternative D2D relaying joint
After point is allowed to become D2D via node, it is also possible to the communication for the outer D2D UE of described net to network is entered
Row relaying also applies for resource.
In said method, described alternative D2D via node please to the D2D via node that becomes that eNB sends
Can carry the identity of the outer D2D UE of described net in asking, the approach of described request includes that RRC connects.
Further, described eNB allows the basis for estimation of described request to include:
The position of existing each D2D via node and offered load；
Ask to become position and the offered load of each alternative D2D via node of D2D via node；
Whether existing D2D via node and request become the alternative D2D via node of D2D via node
Exist for the node that the outer D2D UE of described network coverage carries out relaying；
Send the offered load of the alternative D2D via node of described request；
The interference of the alternative D2D via node self and the interior neighbours UE of net thereof that send described request controls.
Further, described eNB can also be connected by RRC or SIB broadcast replies whether allow institute
State the request of alternative D2D via node, and use single via node communication pattern or multiple via node
Collaboration diversity communication pattern.
For said method, this part content provides following two implementations.
Scheme one:
1, when D2D UE meets following condition, become alternative D2D relay UE:
A (), in network coverage, has the ability communicated with eNB；
B () is had the ability to become UE-to-Network Relay node；
C () is configured to UE outer to network coverage by eNB and carries out D2D discovery, or this UE self
UE outer to network coverage is selected to carry out D2D discovery；
2, alternative D2D relaying UE is in D2D discovery procedure, listens to the D2D outside network coverage
UE；
3, alternative D2D relaying UE is according to the busy situation of self, decides whether to propose to become to eNB
The request of UE-to-Network Relay node；
If alternative D2D relaying UE determines to file a request to eNB, portability or do not carry step in request
The identity (e.g.UE ID) of the outer UE of net listened in rapid 2；Request approach includes: RRC connects；
4, eNB judges whether to agree to the request of this alternative D2D relaying UE, it is judged that do not limit according to including
In:
A () existing UE-to-Network Relay node listing, at least considers the position of each node in list
Put and offered load；
B () has requested that the alternative D2D becoming UE-to-Network Relay node relays UE list,
At least consider position and the offered load of each node in list；
(c) a) and b) in existed for the step 2 that this alternative D2D relaying UE reports is intercepted
To the outer UE of net carry out the node that relays；
The Network load status of (d) alternative D2D relaying UE；
E in () alternative D2D relaying UE self and net thereof, the interference of neighbours UE controls；
ENB is connected by RRC or SIB broadcast replies whether alternative relaying UE becomes UE-to-Network
Relay node, and use single via node communication pattern or multiple relay node cooperation diversity communication pattern；
If 5 eNB allow this alternative D2D in step 4, relaying UE becomes UE-to-Network Relay
Node, this alternative D2D relaying UE becomes UE-to-Network Relay node, and broadcast is forwarded eNB
Relevant information, broadcast including: SIB.
Embodiment 1: communication scenes based on scheme one and flow process refer to accompanying drawing 1 and accompanying drawing 2, specifically walk
Rapid as follows:
1, UE1 is that alternative D2D relays UE, in network coverage, has the ability communicated with eNB,
Carry out the D2D to netting outer UE to find；
2, D2D UE, UE1 outside UE2 is network coverage listen in D2D discovery procedure
UE2；
3, UE1 connects the request proposing to become UE-to-Network Relay node to eNB by RRC,
Carry the UE ID of UE2；
4, eNB thinks that there is no via node is that UE2 relays, and there is no other in the nearby sphere of UE1
UE-to-Network Relay node, the relay forwarding behavior of UE1 does not interferes with neighbours' joint in the net of UE1
The proper communication of point；ENB connects mandate UE1 by RRC becomes UE-to-Network Relay node；
5, UE1 broadcast forwards the SIB broadcast of eNB.
Scheme two:
1, when D2D UE meets following condition, become alternative D2D relay UE:
A (), in network coverage, has the ability communicated with eNB；
B () is had the ability to become UE-to-Network Relay node；
C () can carry out or not carry out the D2D of UE outer to network coverage and find；
2, alternative D2D relaying UE receives certain or the message of multiple neighbours D2D UE, states neighbours
D2D UE is in outside network coverage, and wishes that alternative D2D relaying UE can be as neighbours D2D UE
Via node to eNB；
3, alternative D2D relaying UE is according to the busy situation of self, decides whether that agreement becomes step 2)
The via node of middle neighbours D2D UE；
If alternative D2D relaying UE agrees to become step 2) in the via node of neighbours D2D UE, can
Can reply or not return phase 2) in neighbours D2D UE, propose to become with backward eNB
The request of UE-to-Network Relay node；
If alternative D2D relaying UE determines to file a request to eNB, portability or do not carry step in request
The identity (e.g.UE ID) of the neighbours D2D UE in rapid 2；Request approach includes: RRC connects；
4, eNB judges whether to agree to the request of this alternative D2D relaying UE, it is judged that do not limit according to including
In:
A () existing UE-to-Network Relay node listing, at least considers the position of each node in list
Put and offered load；
B () has requested that the alternative D2D becoming UE-to-Network Relay node relays UE list,
At least consider position and the offered load of each node in list；
(c) a) and b) in existed for the node that the neighbours D2D UE in step 2 carries out relaying；
The Network load status of (d) alternative D2D relaying UE；
E in () alternative D2D relaying UE self and net thereof, the interference of neighbours UE controls；
ENB is connected by RRC or SIB broadcast replies whether alternative relaying UE becomes UE-to-Network
Relay node, and use single via node communication pattern or multiple relay node cooperation diversity communication pattern；
If 5 eNB allow this alternative D2D in step 4, relaying UE becomes UE-to-Network Relay
Node, this alternative D2D relaying UE becomes UE-to-Network Relay node, and broadcast is forwarded eNB
Relevant information, broadcast including: SIB；
This UE-to-Network Relay node is by the communication for the neighbours D2D UE in step 2 to network
Relay, and be the communication application resource to network of the neighbours D2D UE in step 2.
Embodiment 2: communication scenes based on scheme two and flow process refer to accompanying drawing 3 and accompanying drawing 4, specifically walk
Rapid as follows:
1, UE1 is D2D UE, in network coverage, has the ability communicated with eNB；
2, UE1 receives the message of UE2, and statement UE2 is in outside network coverage, and wishes UE1
Can be as the communication relay node of UE2 to eNB；
3, UE1 agrees to become the via node of UE2, replies UE2 and is asked by it；By RRC even
Connect the request proposing to become UE-to-Network Relay node to eNB, carry the UE ID of UE2；
4, eNB thinks that there is no via node is that UE2 relays, and the relay forwarding behavior of UE1 will not shadow
Ring neighbor node in the net of UE1；ENB connects mandate UE1 by RRC becomes UE-to-Network
Relay node；
5, UE1 broadcast forwards the SIB broadcast of eNB, and UE1 is the data communication of UE2 and eNB
Relay, and for the communication application resource of UE2 to network；
One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can
Completing with the hardware relevant by programmed instruction, aforesaid program can be stored in an embodied on computer readable and deposit
In storage media, this program upon execution, performs to include the step of said method embodiment；And aforesaid storage
Medium includes: the various media that can store program code such as ROM, RAM, magnetic disc or CD.
Last it is noted that above example is only in order to illustrate technical scheme, rather than it is limited
System；Although the present invention being described in detail with reference to previous embodiment, those of ordinary skill in the art
It is understood that the technical scheme described in foregoing embodiments still can be modified by it, or to it
Middle part technical characteristic carries out equivalent；And these amendments or replacement, do not make appropriate technical solution
Essence departs from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (11)
1. the method for the trunk node selection of a D2D communication, it is characterised in that including:
If D2D UE meets condition 1, become alternative D2D via node；Described condition 1 includes:
There is in network coverage the ability communicated with eNB and there is the ability undertaking relay task；
Described alternative D2D via node obtains the outer D2D UE information of network coverage, according to self feelings
Condition decides whether to send to eNB to become the request of D2D via node；
If described request obtains the permission of eNB, the most described alternative D2D via node becomes D2D relaying
Node, and broadcast the relevant information forwarding eNB.
Method the most according to claim 1, it is characterised in that described in have and undertake relay task
The factor of judgment of ability at least includes: the operation of relays of described alternative D2D via node does not affect itself and institute
State communicating of eNB and other interior UE of net.
Method the most according to claim 2, it is characterised in that described in have and undertake relay task
The factor of judgment of ability also includes: the dump energy of described alternative D2D via node and with described eNB's
Link-quality.
4. according to the method described in claims 1 to 3 any one, it is characterised in that also include: described
Alternative D2D via node is configured to UE outer to network coverage by described eNB and carries out D2D discovery,
Or described alternative D2D via node self selects UE outer to network coverage to carry out D2D discovery.
Method the most according to claim 4, it is characterised in that the outer D2D UE of described network coverage
Information carries out D2D by UE outer to network coverage and finds to obtain.
6. according to the method described in Claims 1 to 4 any one, it is characterised in that also include:
The outer D2D UE information of described network coverage from netting the message of outer D2D UE transmission, described in disappear
Breath states that described D2D UE is in outside network coverage and wishes described alternative D2D via node conduct
Via node.
Method the most according to claim 6, it is characterised in that described method also includes: described standby
The message selecting also outer to the described net D2D UE of D2D via node to send carries out response.
Method the most according to claim 7, it is characterised in that described method also includes: described standby
After selecting D2D via node to be allowed to become D2D via node, for the outer D2D UE of described net to network
Communication carries out relaying and applying for resource.
9. according to the method described in claims 1 to 3 any one, it is characterised in that described alternative D2D
Via node to eNB send become D2D via node request in also carry D2D UE outside described net
Identity, the approach of described request includes that RRC connects.
10. according to the method described in claim 1～9 any one, it is characterised in that described eNB permits
The basis for estimation being permitted described request includes:
The position of existing each D2D via node and offered load；
Ask to become position and the offered load of each alternative D2D via node of D2D via node；
Whether existing D2D via node and request become the alternative D2D via node of D2D via node
Exist for the node that the outer D2D UE of described network coverage carries out relaying；
Send the offered load of the alternative D2D via node of described request；
The interference of the alternative D2D via node self and the interior neighbours UE of net thereof that send described request controls.
11. methods according to claim 10, it is characterised in that the method also includes: described eNB
Connected by RRC or SIB broadcast replies the request whether allowing described alternative D2D via node, and adopt
By single via node communication pattern or multiple relay node cooperation diversity communication pattern.
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| CN201510053446.5A CN105992298A (en) | 2015-02-02 | 2015-02-02 | D2D communication relay node selection method |
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| CN113271134A (en) * | 2020-02-17 | 2021-08-17 | 北京紫光展锐通信技术有限公司 | Relay communication method of UE and related product |
| WO2022088826A1 (en) * | 2020-10-28 | 2022-05-05 | 华为技术有限公司 | Computing service discovery method and communication apparatus |
| WO2022147695A1 (en) * | 2021-01-06 | 2022-07-14 | 北京小米移动软件有限公司 | Relay ue selection method and apparatus, information processing method and apparatus, and device and medium |
| CN114760596A (en) * | 2021-01-11 | 2022-07-15 | 维沃移动通信有限公司 | Data transmission method and device and network side equipment |
| CN114760596B (en) * | 2021-01-11 | 2023-08-25 | 维沃移动通信有限公司 | Data transmission method and device and network side equipment |
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