CN106888494A

CN106888494A - A kind of methods, devices and systems for selecting relaying UE

Info

Publication number: CN106888494A
Application number: CN201510945433.9A
Authority: CN
Inventors: 邓云; 刘勇; 李栋
Original assignee: Alcatel Lucent Shanghai Bell Co Ltd
Current assignee: Nokia Shanghai Bell Co Ltd
Priority date: 2015-12-15
Filing date: 2015-12-15
Publication date: 2017-06-23
Anticipated expiration: 2035-12-15
Also published as: CN106888494B

Abstract

The invention provides a kind of method for selecting relaying UE in long-range UE, wherein, the method includes：A. long-range UE broadcast or multicast relayings in network coverage extroversion network coverage find request message；B. receive at least one candidate relay UE feedbacks finds the corresponding response message of request message with the relaying, wherein, the frequency information for being used between wireless access network connection state information and/or candidate relay UE and its Serving cell of the response message including candidate relay UE；C. according to the response message, and the remotely link-quality between the described long-range UE and at least one candidate relay UE measured by UE, a candidate relay UE is selected from least one candidate relay UE as the relaying UE of the long-range UE；D. set up and the direct communication between the relaying UE, so that the long-range UE is communicated by the relaying UE with network.

Description

A kind of methods, devices and systems for selecting relaying UE

Technical field

The present invention relates to communication technical field, more particularly to a kind of side for selecting relaying UE Method, device and system.

Background technology

In the prior art, operator generally needs to dispose repeater at selected position in advance (being similar to small base station in UE), so that the long-range UE outside network coverage (User Equipment) can pass through disposed repeater to be communicated with network, should Scheme needs to spend great lower deployment cost, and flexibility extreme difference, once long-range UE is connected Repeaters fail, the long-range UE will be unable to be communicated with network again, or, must Must complicated switching flow be passed through to switch repeater.

The content of the invention

It is an object of the invention to provide a kind of methods, devices and systems for selecting relaying UE.

According to an aspect of the present invention, there is provided a kind of for selecting relaying UE's in long-range UE First device, wherein, the first device includes：

First dispensing device, for broadcast or group in network coverage extroversion network coverage Broadcast relaying and find request message；

First receiving device, for reception at least one candidate relay UE feedbacks and the relaying It was found that the corresponding response message of request message, wherein, the response message includes candidate relay UE Wireless access network connection state information and/or candidate relay UE and its Serving cell between used Frequency information；

Selection device, for according to the response message and described remote measured by long-range UE Link-quality between journey UE and at least one candidate relay UE, from described at least one A candidate relay UE is selected in candidate relay UE as the relaying UE of the long-range UE；

First sets up device, for the direct communication set up and between the relaying UE, so that institute Long-range UE is stated to be communicated with network by the relaying UE.

According to another aspect of the present invention, additionally provide a kind of for aided remote UE selections The second device of UE is relayed, wherein, the second device includes：

4th reception device, request message is found for receiving the relaying from long-range UE；

Second dispensing device, it is anti-to the long-range UE for when predetermined relay condition is met Present and find the corresponding response message of request message with the relaying, wherein, the response message Wireless access network connection state information and/or candidate relay UE including candidate relay UE and its The frequency information used between Serving cell；

Wherein, the second device is additionally included in after the feedback device the following dress for performing operation Put：

Second sets up device, for the direct communication set up and between the long-range UE, and builds The data cube computation of vertical and Cellular Networks and core net, the relaying UE as the long-range UE comes So that the long-range UE is communicated by relaying UE with network.

According to another aspect of the present invention, there is provided one kind is used to select relaying in long-range UE The method of UE, wherein, the method includes：

A. long-range UE broadcast or multicasts in network coverage extroversion network coverage are relayed It was found that request message；

B. receive at least one candidate relay UE feedbacks finds request message phase with the relaying Corresponding response message, wherein, the response message includes the wireless access of candidate relay UE The frequency used between net connection state information and/or candidate relay UE and its Serving cell is believed Breath；

C. according to the response message, and the described long-range UE measured by long-range UE and institute The link-quality between at least one candidate relay UE is stated, from least one candidate relay A candidate relay UE is selected in UE as the relaying UE of the long-range UE；

D. set up and the direct communication between the relaying UE, so that the long-range UE passes through The relaying UE is communicated with network.

According to another aspect of the present invention, there is provided one kind selects relaying for aided remote UE The method of UE, wherein, the method includes：

A receives the relaying from long-range UE and finds request message；

B has found to the long-range UE feedbacks when predetermined relay condition is met with the relaying The corresponding response message of request message, wherein, the response message includes candidate relay UE Wireless access network connection state information and/or candidate relay UE and its Serving cell between made Frequency information；

Wherein, after the step B, the method also includes：

X sets up and the direct communication between the long-range UE, and sets up and Cellular Networks and core The data cube computation of net, the long-range UE is caused as the relaying UE of the long-range UE Communicated with network by relaying UE.

According to another aspect of the present invention, there is provided it is a kind of for select relaying UE system, its In, the system includes the long-range UE being located at outside network coverage and positioned at network coverage Interior candidate relay UE, the long-range UE includes first device of the present invention, the candidate Relaying UE includes second device of the present invention.

Compared with prior art, the present invention has advantages below：1) long-range UE can be according at least One the wireless access network connection state information and/or frequency information of candidate relay UE, from this A most suitable candidate relay UE is selected to be used as this at least one candidate relay UE remote The relaying UE of journey UE；2) made by candidate relay UE of the selection in RRC connection status Avoid being connected due to RRC cannot be successfully established after UE in selecting for relaying UE And cause service delay；3) by being selected to carry out cellular communication using different frequency simultaneously The candidate relay UE communicated with D2D avoids selected relaying UE as relaying UE The middle conflict occurred between cellular communication and D2D communications；4) long-range UE can be according to coming from The relaying monitoring information of selected relaying UE determines the need for reselecting relaying UE；5) selected relaying UE, can be by MAC when being not suitable for continuing as relaying Layer sends relaying UE gravity treatment configured informations to long-range UE, to advise or notify long-range UE weights Choose after UE, the gravity treatment mechanism can largely save Radio Resource, long-range UE can work as Preceding relaying UE can in time trigger relaying UE when being not suitable anymore for as the relaying UE of long-range UE Gravity treatment mechanism.

Brief description of the drawings

The detailed description made to non-limiting example made with reference to the following drawings by reading, Other features, objects and advantages of the invention will become more apparent upon：

Fig. 1 illustrates for the flow of the method for selecting relaying UE of one embodiment of the invention Figure；

Fig. 2 shows for the flow of the method for selecting relaying UE of another embodiment of the present invention It is intended to；

Fig. 3 is the structural representation of the system for selecting relaying UE of one embodiment of the invention Figure；

Fig. 4 is the structural representation of the system for selecting relaying UE of one embodiment of the invention Figure；

Fig. 5 is the schematic diagram of a scenario of the long-range UE selection relayings UE of one example of the present invention；

Fig. 6 is the schematic diagram of the MAC PDU forms in one SL-SCH of example of the present invention；

Fig. 7 is a schematic diagram for the SL-SCH MAC heads of example.

Same or analogous reference represents same or analogous part in accompanying drawing.

Specific embodiment

The present invention is described in further detail below in conjunction with the accompanying drawings.

Fig. 1 illustrates for the flow of the method for selecting relaying UE of one embodiment of the invention Figure.The method according to the invention is mainly realized by long-range UE and relay candidate UE；Its In, the long-range UE is used to represent the user equipment outside network coverage；Wherein, The candidate relay UE is used to represent in network coverage and the use with relay capabilities Family equipment, the candidate relay UE should have is used for the interface being connected with long-range UE (such as PC5 interfaces) and interface (such as Uu interfaces) for being connected with its Serving cell.For example, Fig. 5 is the schematic diagram of a scenario of the long-range UE selection relayings UE of one example of the present invention, wherein, UE1 and UE2 is located in the network coverage of eNB, and UE1 and UE2 are respectively provided with PC5 , there is long-range UE outside network coverage in interface and Uu interfaces, therefore, UE1 and UE2 Can be used as candidate relay UE.

Method according to the present embodiment includes step S101, step S102, step S103, step Rapid S04, step S105, step S106 and step S107.

In step S101, long-range UE is in network coverage extroversion network coverage Broadcast or multicast relaying finds request message.

Wherein, the relaying finds that request message includes that any relaying with long-range UE finds to ask Seek related information；Preferably, the relaying finds that request message is included but is not limited to：Message Type, the identification information (such as ID) of long-range UE, group identification information (such as group of long-range UE ID) etc..

As an example, when long-range UE monitors that the long-range UE is located at network coverage Outward, and when the long-range UE wishes to be communicated with network, the long-range UE is to network coverage model Enclose interior broadcast relay and find request message, relaying is found that request message is sent to the network coverage In the range of all user equipmenies.

As another example, when long-range UE monitors that the long-range UE is located at network coverage model Enclose outer, and the long-range UE, when wishing to be communicated with network, the long-range UE is to the network coverage In the range of multicast relaying find request message, relaying is found that request message sends to network and covers One group of user equipment in the range of lid.

It should be noted that for simplicity, although in illustrate only a candidate in Fig. 1 After UE, but those skilled in the art will be understood that in network coverage there may be multiple times Choose after UE.

It should be noted that the above-mentioned examples are merely illustrative of the technical solutions of the present invention, and Non- limitation of the present invention, it should be appreciated by those skilled in the art that any in network coverage Broadcast or multicast relaying finds the implementation of request message in export-oriented network coverage, all should Within the scope of the present invention.

In step s 102, candidate relay UE receives the relaying from long-range UE and finds request Message.

Although it should be noted that illustrate only a candidate relay UE, ability in Fig. 1 Field technique personnel will be understood that when long-range UE has found to ask to broadcast relay in network coverage When seeking message, all user equipmenies in network coverage can receive the relaying and find to ask Seek message；When long-range UE is to multicast relaying discovery request message in network coverage, net Belong in network coverage the user equipment of multicast group can receive the relaying find request disappear Breath.It should be further stated that, receive the user equipment of relaying discovery request message not Necessarily can be used as candidate relay UE, it is impossible to will not as the user equipment of candidate relay UE The secondary existing request message of centering responds.

As an example, based on the scene shown in Fig. 5, in step S101, long-range UE Broadcast relay finds request message in network coverage extroversion network coverage；In step In S102, UE1 and UE2 in network coverage receive the relaying from long-range UE It was found that request message.

In step s 103, when predetermined relay condition is met, candidate relay UE is to described Long-range UE feedbacks find the corresponding response message of request message with the relaying.

Wherein, the predetermined relay condition sets including any user for judging in coverage The standby condition for whether possessing relay capabilities；For example, predetermined relay condition is indicated when in coverage User equipment there is PC5 interfaces and Uu interfaces simultaneously, and the electricity of the user equipment is higher than During predetermined threshold, the user equipment possesses relay capabilities.It should be noted that pre- when being unsatisfactory for When determining relay condition, it is not necessary to which the secondary existing request message of centering responds.

Wherein, the response message is used to indicate candidate relay UE to be directed to from long-range UE's Relaying finds the response done by request message.

Wherein, the response message includes that the wireless access network connection status of candidate relay UE is believed The frequency information used between breath and/or candidate relay UE and its Serving cell.Wherein, it is described Wireless access network connection state information includes any wireless access for indicating candidate relay UE The information of net connection status；For example, during wireless access network connection state information is used to indicate candidate RRC connection status (RRC_Connected) or idle condition (RRC_Idle) are in after UE. Wherein, the frequency information is used to indicate what is used between candidate relay UE and its Serving cell Whether the carrier frequency used between carrier frequency and candidate relay UE and long-range UE is identical； For example, candidate relay UE have for be connected with long-range UE PC5 interfaces and for The Uu interfaces that its Serving cell is connected, the frequency information is used to indicate candidate relay UE institutes Whether the Uu link frequencies for using are identical with PC5 link frequencies.It should be noted that elected Need to consider what is used between candidate relay UE and its Serving cell during selecting relaying UE During frequency information, it is assumed that candidate relay UE can support that the honeycomb for processing different frequency simultaneously leads to Letter and D2D (Device-to-Device) communications.

Preferably, the response message also mark including candidate relay UE and long-range UE is believed Breath, such as ID of the ID of candidate relay UE and long-range UE.Preferably, the response message Also include the information of the relay capabilities for indicating candidate relay UE, such as backhaul link quality Remaining trunking capacity in (backhaul link quality), the link supported etc..

It should be noted that the response message can be used selected or scheduling resource with wide Broadcast, the form of unicast or multicast is transmitted.

Although it should be noted that illustrate only a candidate relay UE, ability in Fig. 1 Field technique personnel will be understood that when exist multiple candidate relay UE when, the plurality of candidate relay UE can perform step S103 to be come to long-range UE feedback response messages.

Used as an example, based on the scene shown in Fig. 5, UE1 determines that it meets predetermined relaying Condition, and the corresponding response message of request message is found to long-range UE feedbacks and relaying, should Response message includes the wireless access network connection state information of UE1, wireless access network connection Status information indicates UE1 to be in RRC connection status；UE2 determines that it meets predetermined relaying bar Part, and find the corresponding response message of request message, the sound to long-range UE feedbacks and relaying The wireless access network connection state information for answering message to include UE2, wireless access network connection shape State information indicates UE2 to be in idle condition.

As another example, based on the scene shown in Fig. 5, during UE1 determines that its satisfaction is predetermined After condition, and the corresponding response message of request message is found to long-range UE feedbacks and relaying, The response message includes the frequency information used between UE1 and eNB, and the frequency information is indicated The Uu link frequencies that UE1 is used are different with PC5 link frequencies；It is pre- that UE2 determines that it meets Determine relay condition, and find that the corresponding response of request message disappears to long-range UE feedbacks and relaying Breath, the response message includes the frequency information used between UE2 and eNB, the frequency information The Uu link frequencies for indicating UE2 to be used are identical with PC5 link frequencies.

As another example, based on the scene shown in Fig. 5, during UE1 determines that its satisfaction is predetermined After condition, and the corresponding response message of request message is found to long-range UE feedbacks and relaying, The response message is included between the wireless access network connection state information and UE1 and eNB of UE1 The frequency information for being used, the wireless access network connection state information indicates UE1 to be in RRC Connection status, the frequency information indicates the Uu link frequencies that are used of UE1 and PC5 links frequently Rate is different；UE2 determines that it meets predetermined relay condition, and feeds back secondary with long-range UE The corresponding response message of existing request message, the response message includes the wireless access network of UE2 The frequency information used between connection state information and UE2 and eNB, the wireless access network Connection state information indicates UE2 to be in idle condition, and the frequency information indicates UE2 to be used Uu link frequencies it is identical with PC5 link frequencies.

It should be noted that the above-mentioned examples are merely illustrative of the technical solutions of the present invention, and Non- limitation of the present invention, it should be appreciated by those skilled in the art that any when the predetermined relaying of satisfaction During condition, the corresponding response of request message is found with the relaying to the long-range UE feedbacks The implementation of message, should be included in the scope of the present invention.

In step S104, long-range UE receive at least one candidate relay UE feedbacks with institute State relaying and find the corresponding response message of request message.

It should be noted that work as in network coverage having multiple candidate relay UE to long-range UE During feedback response message, long-range UE receives each time in the plurality of candidate relay UE respectively Choose and find the corresponding response message of request message with relaying after what UE was fed back.

In step S105, long-range UE is according to the response message, and long-range UE is surveyed Link-quality between the described long-range UE and at least one candidate relay UE of amount, from A candidate relay UE is selected at least one candidate relay UE as the long-range UE Relaying UE.

Wherein, the D2D chains between the link-quality namely long-range UE and candidate relay UE Road quality；When candidate relay UE is connected using PC5 interfaces with long-range UE, the link Quality is PC5 link-qualities.

Used as an example, based on scene shown in Fig. 5, the response message of UE1 feedbacks includes The wireless access network connection state information of UE1, the wireless access network connection state information is indicated UE1 is in RRC connection status；The response message of UE2 feedbacks includes the wireless access of UE2 Net connection state information, the wireless access network connection state information indicates UE2 to be in idle shape State；In step S105, long-range UE determines the long-range UE and UE1 measured by it Between link-quality and the link-quality between the long-range UE and UE2 be satisfied by predetermined link matter Amount condition (such as link-quality be higher than predetermined quality threshold value), then long-range UE according to UE1 and The response message that UE2 is fed back, selection is in RRC connection status from UE1 and UE2 UE1 as long-range UE intermediate UE.If it should be noted that the relaying of long-range UE selections UE is in idle condition, then relaying UE needs to initiate random access procedure to set up RRC Connection, due to the feelings that random access procedure is broken down or serving BS refusal is accessed may occur Shape, the situation such as this can cause the relaying UE cannot to be successfully established the RRC between serving BS Connection, this causes that long-range UE must reselect relaying UE, so as to service delay can be caused； It is therefore preferred that in the case where link-quality meets predetermined link quality conditions, remotely UE prioritizing selections are currently at the candidate relay UE of RRC connection status, and to be used as this long-range The relaying UE of UE, this can be prevented effectively from the service delay caused due to RRC connection failures.

As another example, it is assumed that UE1 and UE2 can support to process different frequency simultaneously Cellular communication and D2D communication；Based on scene shown in Fig. 5, the response message of UE1 feedbacks Including the frequency information used between UE1 and eNB, the frequency information indicates UE1 to be used Uu link frequencies it is different with PC5 link frequencies；The response message of UE2 feedbacks includes UE2 The frequency information used between eNB, the frequency information indicates the Uu chains that UE2 is used Road frequency is identical with PC5 link frequencies；In step S105, long-range UE determines that it is surveyed The chain between link-quality and the long-range UE and UE2 between the long-range UE and UE1 for measuring Road quality is satisfied by predetermined link quality conditions (such as link-quality is higher than predetermined quality threshold value), The response message that then long-range UE is fed back according to UE1 and UE2, selects from UE1 and UE2 The used Uu link frequencies UE1 different with PC5 link frequencies is selected as long-range UE's Intermediate UE.It should be noted that selected relaying UE is divided using different frequency simultaneously Cellular communication and D2D communications are not carried out, and this can be prevented effectively from the cellular communication in relaying UE And the conflict between D2D communications.

Used as a kind of preferred scheme, the response message of candidate relay UE feedbacks also includes backhaul chain Road quality, in step S105, backhauls of the long-range UE according at least one candidate relay UE Link-quality, wireless access network connection state information and/or frequency information, and long-range UE institutes Link-quality between the long-range UE and at least one candidate relay UE of measurement, from this A candidate relay UE is selected at least one candidate relay UE as the long-range UE's Relaying UE.

As an example, based on scene shown in Fig. 5, when UE1 and UE2 are satisfied by making a reservation for Link quality conditions, and UE1 has similar backhaul link quality (in the scene with UE2 In backhaul link quality namely Uu link-qualities) when, long-range UE prioritizing selections be in RRC The UE1 of connection status as the long-range UE relaying UE.

It should be noted that when during this discovery, long-range UE does not choose suitably (such as predetermined quality threshold value is below during relaying UE with the link-quality between candidate relay UE), Long-range UE will step S101 carrys out the relaying of broadcast or multicast again again during next discovery It was found that request message.

It should be noted that the example above be only be better described it is of the invention state response message, And described long-range UE and at least one technical scheme measured by long-range UE, rather than Limitation of the present invention, it should be appreciated by those skilled in the art that any according to institute's candidate relay Link-quality between UE, selects a candidate from least one candidate relay UE Relaying UE should be included in this hair as the implementation of the relaying UE of the long-range UE In bright scope.

After the relaying UE that have selected long-range UE, long-range UE performs step S106, and Relaying UE performs step S107 so that long-range UE can by selected relaying UE and Network is communicated.

In step s 106, long-range UE sets up and the direct communication between the relaying UE, So that the long-range UE is communicated by the relaying UE with network.

Direct communication (direct communication) between long-range UE foundation and relaying UE During, cross validation and D2D links can be carried out between long-range UE and relaying UE first Security setting.

Specifically, long-range UE initiates the direct communication request to relaying U1, and based on in Direct communication between being set up after the interaction of UE and relaying UE.

In step s 107, the selected relaying UE of long-range UE set up and the long-range UE Between direct communication, and the data cube computation with Cellular Networks and core net is set up, as described The relaying UE of long-range UE causes that the long-range UE is led to by relaying UE with network Letter.

It should be noted that not showing that selected relaying UE for the sake of simplicity, in Fig. 1 Set up the process of the data cube computation with Cellular Networks and core net.

After step S107, between long-range UE and network by selected relaying UE come Carry out data transmission.The selected relaying UE can be relayed between long-range UE and network Unicast traffic (including uplink and downlink flow).

Used as a kind of preferred scheme, after step S107, the method for the present embodiment also includes Following steps：Selected relaying UE sends relaying monitoring information to long-range UE；Long-range UE The relaying monitoring information from the relaying UE is received, and is surveyed according to the relaying monitoring information Measure the channel quality between the long-range UE and the relaying UE.

Preferably, the relaying monitoring information is discovery message.

Preferably, selected relaying UE periodically sends relaying monitoring letter to long-range UE Breath, long-range UE periodically its relaying monitoring informations of reception from relaying UE, and according to The relaying monitoring information for receiving measure the long-range UE and relaying UE between channel quality (such as D2D link-qualities).

It should be noted that long-range UE can estimate long-range UE by decoding relaying monitoring information With the link-quality between relaying UE, and understanding other information, the backhaul of UE is such as relayed Link-quality etc..

Preferably, the preferred scheme is further comprising the steps of：When monitoring that the channel quality is low When predetermined threshold, long-range UE repeat steps S101 comes again to wide in network coverage Broadcast or multicast relaying finds request message, to reselect relaying UE.

Specifically, when detecting the channel quality between long-range UE and selected relaying UE During the predetermined threshold of region, long-range UE determine relaying UE be not suitable anymore for as long-range UE with Relaying between network, long-range UE terminates it and services and discharge straight and between current hop UE Communication connection is connect, and repeat step S101 comes again to broadcast or multicast in network coverage Relaying finds request message, to reselect a relaying UE.

In the prior art, operator generally disposes repeater and (is seen in UE in advance in ad-hoc location To be similar to small base station) come enable be located at network coverage outside long-range UE pass through Repeater is communicated with network, and the program needs great lower deployment cost, and once relays Device breaks down, and long-range UE will be unable to be communicated with network again.

At present, it has been proposed that introduce UE-to-network relayings (relay) to support that covering is prolonged The scheme stretched, that is, the user equipment that long-range UE may be selected in network coverage comes As the relaying UE of the long-range UE, so as to be communicated with network；However, in existing skill In art, long-range UE considers between long-range UE and relaying UE when UE, only in selecting Whether link meets condition, and how to trigger long-range UE gravity treatments relaying UE still under study for action. Present invention finds there is problems with the prior art：1) long-range UE is in selecting after UE During do not consider the wireless access network connection status of candidate relay UE, therefore, it is selected The relaying UE for selecting is likely to be at idle condition, and under the situation, selected relaying UE needs First initiate random access procedure to set up RRC connections, if relaying UE cannot be successfully established RRC between serving BS is connected, then long-range UE must reselect relaying UE, from And service delay can be caused；2) after relaying UE starts service and long-range UE, may be by Link-quality between relaying UE and serving BS is poor, or, due to relaying UE The limitation of itself and cannot continue to serve as the relaying UE of long-range UE, but prior art is not Support the relaying UE gravity treatments under the situation such as this.

According to the scheme of the present embodiment, long-range UE can be according at least one candidate relay UE's Wireless access network connection state information and/or frequency information, from least one candidate relay A most suitable candidate relay UE is selected to be used as the relaying UE of the long-range UE in UE； Can be used as relaying UE by candidate relay UE of the selection in RRC connection status to avoid Cause service delay due to RRC connections cannot be successfully established after UE in selecting； Can be by being selected to carry out the candidate that cellular communication and D2D communicate using different frequency simultaneously Relaying UE avoid occurring in selected relaying UE as relaying UE cellular communication with Conflict between D2D communications；Long-range UE is from the candidate relay UE in network coverage One relaying UE of selection, the selection mechanism disposes repeater in advance without operator, and great Flexibility, greatlys save operation cost, and is particularly suited for geographically being inconvenient to dispose relaying The region of device there occurs the region of disaster；A kind of weight of relaying UE is provided in the present embodiment Select mechanism, long-range UE can according to the relaying monitoring information from selected relaying UE, To determine the need for reselecting relaying UE, that is, long-range UE can be supervised by relaying Control information know relaying UE itself state (such as electricity or power) and/or relaying UE with Link-quality between serving BS, so as to be not suitable anymore for as long-range UE in current hop UE Relaying UE when can trigger in time relaying UE gravity treatment mechanism.

Fig. 2 shows for the flow of the method for selecting relaying UE of another embodiment of the present invention It is intended to.Method according to the present embodiment include step S101, step S102, step S103, Step S04, step S105, step S106, step S107, step S108, step S109, Step S110；Wherein, the step S101, step S102, step S103, step S04, Step S105, step S106 and step S107 are described in detail in reference picture 1, herein Repeat no more.

In the present embodiment, after step S107, long-range UE and selected relaying UE leads to Cross and perform step S108, step S109, step S110 and reselect relaying UE's triggering Operation.

In step S108, when relaying UE gravity treatment trigger conditions are met, relaying UE ( It is selected as relaying the candidate relay UE of UE) send relaying UE to the long-range UE Gravity treatment configured information, relaying UE gravity treatments configured information is by direct communication packet MAC layer control information is carried.

Wherein, the relaying UE gravity treatments trigger condition includes any and is used to trigger current hop UE reselects the condition of its relaying UE to long-range UE suggestions, and such as current electric quantity is less than predetermined Link-quality between charge value and serving BS is less than predetermined power less than predetermined threshold, power Value etc..It should be noted that when relaying UE gravity treatment trigger conditions are met, illustrating current Relaying UE has been not suitable for being re-used as the relaying UE of long-range UE.

Wherein, the relaying UE gravity treatments configured information includes any for indicating re eligible to relay The information of UE；Preferably, the relaying UE gravity treatment configured informations are included but is not limited to：Should The information about power of current hop UE, the link quality information between power information and serving BS, Or directly represent the information of suggestion gravity treatment relaying UE (as " 1 " represents suggestion gravity treatment relaying UE)。

Preferably, the relaying UE gravity treatment configured informations are added into the MAC layer control Filler in the head of information, and/or, the MAC controls of the MAC layer control information In unit.

For example, Fig. 6 is the MAC PDU forms in one SL-SCH of example of the present invention Schematic diagram, wherein, " MAC Control element 1 " is that a newly-increased MAC controls are single Unit, when relaying UE detects its electricity less than predetermined charge value, relaying UE is to long-range UE sends relaying UE gravity treatment configured informations, and relaying UE gravity treatments configured information is added to Fig. 6 In shown " MAC Control element 1 ".

Again for example, Fig. 7 is a schematic diagram for the SL-SCH MAC heads of example, its In, " R " represents filler, there is four reserved bits in the sub- head；When relaying UE is detected When its Uu link-quality is less than predetermined threshold, relaying UE sends relaying UE to long-range UE Gravity treatment configured information, relaying UE gravity treatments configured information is added in the filler shown in Fig. 7.

Again for example, its Uu link-quality to be added to relaying UE the head of MAC control information Filler in, and by its current electric quantity added to the MAC increased newly in MAC control information In control unit, and sent to long-range UE by MAC layer.

It should be noted that the above-mentioned examples are merely illustrative of the technical solutions of the present invention, and Non- limitation of the present invention, it should be appreciated by those skilled in the art that any as satisfaction relaying UE During gravity treatment trigger condition, relaying UE gravity treatment configured informations are sent to the long-range UE, in this MAC layer control information in UE gravity treatments configured information passes through direct communication packet is carried Implementation, should be included in the scope of the present invention.

In step 109, long-range UE receives the direct communication from selected relaying UE MAC layer control information in packet, comprising relaying UE in the MAC layer control information Gravity treatment configured information.

Specifically, long-range UE receives the direct communication packet from selected relaying UE In MAC layer control information, and extract the relaying entrained by the MAC layer control information UE gravity treatment configured informations.

For example, in step S108, relaying UE is added to UE gravity treatment configured informations are relayed In " MAC Control element 1 " shown in Fig. 6, and sent to remote by MAC layer Journey UE；In step S109, long-range UE is received shown in the Fig. 6 from relaying UE MAC layer control information, and extract the relaying entrained by " MAC Control element 1 " UE gravity treatment configured informations.

Again for example, in step S108, relaying UE will relay the addition of UE gravity treatments configured information Into first filler shown in Fig. 7, and sent to long-range UE by MAC layer； In step S109, long-range UE receives the MAC layer control shown in the Fig. 7 from relaying UE Information, and extract entrained relaying UE gravity treatment configured informations in first filler.

It should be noted that the above-mentioned examples are merely illustrative of the technical solutions of the present invention, and Non- limitation of the present invention, it should be appreciated by those skilled in the art that any receive from selected Relaying UE direct communication packet in MAC layer control information, the MAC layer control Comprising the implementation of relaying UE gravity treatment configured informations in information processed, the present invention is should be included in In the range of.

In step s 110, needed again when according to relaying UE gravity treatments configured information determination During new selection relaying UE, long-range UE repeat steps S101 to be broadcasted in network range again Or multicast relaying finds request message.

Wherein, long-range UE can be determined the need for using various ways according to gravity treatment configured information Reselect relaying UE.

For example, after long-range UE receives the relaying UE gravity treatment configured informations from relaying UE, Directly determine to need selection relaying UE.

Again for example, long-range UE is according to the relaying UE gravity treatment configured informations for receiving, and in advance (the D2D link-qualities between such as long-range UE and relaying UE are less than predetermined door to determine Rule of judgment Limit), it is determined whether needs reselect relaying UE.

Again for example, relaying UE gravity treatment configured informations of the long-range UE according to received by and in After monitoring information, it is determined whether needs reselect relaying UE.

It should be noted that when long-range UE determines to reselect relaying UE, far Journey UE does not perform operation.

It should be noted that the above-mentioned examples are merely illustrative of the technical solutions of the present invention, rather than Limitation of the present invention, it should be appreciated by those skilled in the art that any when according to the relaying UE When gravity treatment configured information determines that needs reselect relaying UE, long-range UE repeat steps S101's Implementation, should be included in the scope of the present invention.

According to the scheme of the present embodiment, there is provided another kind is directed to the gravity treatment mechanism of relaying UE, Selected relaying UE, can be by MAC layer to remote when being not suitable for continuing as relaying Journey UE sends relaying UE gravity treatment configured informations, to advise or notify that long-range UE gravity treatments are relayed UE, the gravity treatment mechanism can largely save Radio Resource, and long-range UE can be in current hop UE is not suitable anymore for as to be triggered in time during the relaying UE of long-range UE the gravity treatment of relaying UE Mechanism；May include to relay the link between UE and serving BS in relaying UE gravity treatment configured informations Quality related information, so that long-range UE can more timely and accurately judge whether to need to select again Select relaying UE.

Fig. 3 is the structural representation of the system for selecting relaying UE of one embodiment of the invention Figure.The system includes the long-range UE being located at outside the network coverage and in network coverage Candidate relay UE；Wherein, the long-range UE includes the first device for selecting relaying UE, The first device includes the first dispensing device 101, first receiving device 104, selection device 105 Device 106 is set up with first；Wherein, the candidate relay UE includes being used for aided remote UE The second device of selection relaying UE, the second device includes the 4th reception device 102, second Dispensing device 103 and second sets up device 107.It should be noted that for simplicity, A candidate relay UE is illustrate only in Fig. 3, those skilled in the art will be understood that network Multiple candidate relay UE are there may be in coverage.

First dispensing device 101 of long-range UE is used in the network coverage extroversion network coverage In the range of broadcast or multicast relaying find request message.

As an example, when long-range UE monitors that the long-range UE is located at network coverage Outward, and when the long-range UE wishes to be communicated with network, the first transmission dress of the long-range UE Put 101 and find request message to broadcast relay in network coverage, relaying is found into request Message sends all user equipmenies to network coverage.

As another example, when long-range UE monitors that the long-range UE is located at network coverage model Enclose outer, and the long-range UE is when wishing to be communicated with network, first transmission of the long-range UE Device 101 finds request message to multicast relaying in network coverage, and relaying is found please Message is asked to send one group of user equipment to network coverage.

4th reception device 102 of candidate relay UE receives the relaying from long-range UE and finds Request message.

Although it should be noted that illustrate only a candidate relay UE, ability in Fig. 3 Field technique personnel will be understood that the first dispensing device 101 as long-range UE to network coverage model When enclosing interior broadcast relay discovery request message, in all user equipmenies in network coverage 4th reception device 102 can receive the relaying and find request message；When the of long-range UE To when multicast relaying finds request message in network coverage, network covers one dispensing device 101 The 4th reception device 102 belonged in the range of lid in the user equipment of multicast group can receive this Relaying finds request message.It should be further stated that, receive relaying and find request message User equipment might not be used as candidate relay UE, it is impossible to as candidate relay UE User equipment will misalign secondary existing request message and respond.

As an example, based on the scene shown in Fig. 5, first dispensing device of long-range UE 101 network coverage extroversion network coverage in broadcast relay find request message；Net 4th reception device 102 and the 4th reception device 102 of UE2 of the UE1 in network coverage Receive the relaying from long-range UE and find request message.

When predetermined relay condition is met, second dispensing device 103 of candidate relay UE is to institute State long-range UE feedbacks and find the corresponding response message of request message with the relaying.

Wherein, the response message includes that the wireless access network connection status of candidate relay UE is believed The frequency information used between breath and/or candidate relay UE and its Serving cell.Wherein, it is described Wireless access network connection state information includes any wireless access for indicating candidate relay UE The information of net connection status；For example, during wireless access network connection state information is used to indicate candidate RRC connection status (RRC_Connected) or idle condition (RRC_Idle) are in after UE. Wherein, the frequency information is used to indicate what is used between candidate relay UE and its Serving cell Whether the carrier frequency used between carrier frequency and candidate relay UE and long-range UE is identical； For example, candidate relay UE have for be connected with long-range UE PC5 interfaces and for The Uu interfaces that its Serving cell is connected, the frequency information is used to indicate candidate relay UE institutes Whether the Uu link frequencies for using are identical with PC5 link frequencies.It should be noted that elected Need to consider what is used between candidate relay UE and its Serving cell during selecting relaying UE During frequency information, it is assumed that candidate relay UE can support that the honeycomb for processing different frequency simultaneously leads to Letter and D2D communications.

Although it should be noted that illustrate only a candidate relay UE, ability in Fig. 3 Field technique personnel will be understood that when exist multiple candidate relay UE when, the plurality of candidate relay Second dispensing device 103 of UE can perform operation to be come to long-range UE feedback response messages.

As an example, based on the scene shown in Fig. 5, second dispensing device 103 of UE1 Determine that it meets predetermined relay condition, and request message phase is found to long-range UE feedbacks and relaying Corresponding response message, the response message includes the wireless access network connection state information of UE1, The wireless access network connection state information indicates UE1 to be in RRC connection status；The of UE2 Two dispensing device 103 determines that it meets predetermined relay condition, and is fed back and relaying to long-range UE It was found that the corresponding response message of request message, wireless access of the response message including UE2 Net connection state information, the wireless access network connection state information indicates UE2 to be in idle shape State.

As another example, based on the scene shown in Fig. 5, second dispensing device of UE1 103 determine that it meets predetermined relay condition, and find that request disappears to long-range UE feedbacks and relaying The corresponding response message of manner of breathing, the response message includes the frequency used between UE1 and eNB Information, the frequency information indicates the Uu link frequencies that are used of UE1 and PC5 link frequencies not Together；Second dispensing device 103 of UE2 determines that it meets predetermined relay condition, and to long-range UE feeds back and finds the corresponding response message of request message with relaying, and the response message includes The frequency information used between UE2 and eNB, the frequency information indicates the Uu that UE2 is used Link frequency is identical with PC5 link frequencies.

As another example, based on the scene shown in Fig. 5, second dispensing device of UE1 103 determine that it meets predetermined relay condition, and find that request disappears to long-range UE feedbacks and relaying The corresponding response message of manner of breathing, the response message includes the wireless access network connection status of UE1 The frequency information used between information and UE1 and eNB, the wireless access network connection status Information indicates UE1 to be in RRC connection status, and the frequency information indicates what UE1 was used Uu link frequencies are different with PC5 link frequencies；Second dispensing device 103 of UE2 determines it Meet predetermined relay condition, and find that request message is corresponding to long-range UE feedbacks and relaying Response message, the response message includes the wireless access network connection state information and UE2 of UE2 The frequency information used between eNB, the wireless access network connection state information indicates UE2 In idle condition, the frequency information indicates the Uu link frequencies and PC5 that UE2 is used Link frequency is identical.

The first receiving device 104 of long-range UE receives at least one candidate relay UE feedbacks The corresponding response message of request message is found with the relaying.

It should be noted that work as in network coverage having multiple candidate relay UE to long-range UE During feedback response message, the first receiving device 104 of long-range UE is performed a plurality of times operation to distinguish Receive that each candidate relay UE in the plurality of candidate relay UE fed back finds with relaying The corresponding response message of request message.

The selection device 105 of long-range UE is according to the response message, and long-range UE is surveyed Link-quality between the described long-range UE and at least one candidate relay UE of amount, from A candidate relay UE is selected at least one candidate relay UE as the long-range UE Relaying UE.

Used as an example, based on scene shown in Fig. 5, the response message of UE1 feedbacks includes The wireless access network connection state information of UE1, the wireless access network connection state information is indicated UE1 is in RRC connection status；The response message of UE2 feedbacks includes the wireless access of UE2 Net connection state information, the wireless access network connection state information indicates UE2 to be in idle shape State；Between the selection device 105 of long-range UE determines the long-range UE and UE1 measured by it Link-quality and the long-range UE and UE2 between link-quality be satisfied by predetermined link-quality Condition (such as link-quality be higher than predetermined quality threshold value), the then selection device 105 of long-range UE According to the response message that UE1 and UE2 are fed back, selection is in RRC from UE1 and UE2 The UE1 of connection status as long-range UE intermediate UE.If it should be noted that selection dress The relaying UE for putting 105 selections is in idle condition, then relaying UE needs to initiate to connect at random Enter program to set up RRC connections, broken down or clothes due to random access procedure may occur Business base station refusal access situation, the situation such as this can cause relaying UE cannot be successfully established with RRC connections between serving BS, this causes that long-range UE must reselect relaying UE, So as to service delay can be caused；It is therefore preferred that meeting predetermined link-quality in link-quality In the case of condition, long-range UE prioritizing selections are currently in the candidate of RRC connection status It is used as the relaying UE of the long-range UE after UE, this can be prevented effectively from and be lost because RRC is connected The service delay for losing and causing.

As another example, it is assumed that UE1 and UE2 can support to process different frequency simultaneously Cellular communication and D2D communication；Based on scene shown in Fig. 5, the response message of UE1 feedbacks Including the frequency information used between UE1 and eNB, the frequency information indicates UE1 to be used Uu link frequencies it is different with PC5 link frequencies；The response message of UE2 feedbacks includes UE2 The frequency information used between eNB, the frequency information indicates the Uu chains that UE2 is used Road frequency is identical with PC5 link frequencies；The selection device 105 of long-range UE is determined measured by it The link between link-quality and the long-range UE and UE2 between the long-range UE and UE1 for arriving Quality is satisfied by predetermined link quality conditions (such as link-quality is higher than predetermined quality threshold value), then The response message that selection device 105 is fed back according to UE1 and UE2, from UE1 and UE2 The used Uu link frequencies of the middle selection UE1 different with PC5 link frequencies is used as long-range The intermediate UE of UE.It should be noted that selected relaying UE uses different frequency simultaneously To carry out cellular communication and D2D communications respectively, this can be prevented effectively from the honeycomb in relaying UE Conflict between communication and D2D communications.

Used as a kind of preferred scheme, the response message of candidate relay UE feedbacks also includes backhaul chain Road quality, the backhaul of the selection device 105 of long-range UE according at least one candidate relay UE Link-quality, wireless access network connection state information and/or frequency information, and long-range UE institutes Link-quality between the long-range UE and at least one candidate relay UE of measurement, from this A candidate relay UE is selected at least one candidate relay UE as the long-range UE's Relaying UE.

As an example, based on scene shown in Fig. 5, when UE1 and UE2 are satisfied by making a reservation for Link quality conditions, and UE1 has similar backhaul link quality (in the scene with UE2 In backhaul link quality namely Uu link-qualities) when, the selection device 105 of long-range UE Prioritizing selection is in the UE1 of RRC connection status as the relaying UE of the long-range UE.

It should be noted that when during this discovery, not choosing for long-range UE is suitable Relaying UE when (be such as below predetermined quality threshold value with the link-quality between candidate relay UE), Long-range UE will step S101 carrys out the relaying of broadcast or multicast again again during next discovery It was found that request message.

After the relaying UE that have selected long-range UE, the first of long-range UE sets up device 106 Perform operation, and relaying UE second sets up device 107 and performs operation, so that remotely UE Can be communicated with network by selected relaying UE.

The first of long-range UE is set up device 106 and sets up directly logical and the relaying UE between Letter, so that the long-range UE is communicated by the relaying UE with network.

Specifically, the first of long-range UE is set up device 106 and initiates to the directly logical of relaying U1 Letter request, and based on interacting to set up and relay the direct communication between UE with relaying UE.

In the selected relaying UE of long-range UE second sets up device 107 sets up remote with described Direct communication between journey UE, and the data cube computation with Cellular Networks and core net is set up, to make Cause that the long-range UE passes through relaying UE and network for the relaying UE of the long-range UE Communicated.

After second sets up the execution operation of device 107, quilt is passed through between long-range UE and network The relaying UE of selection carries out data transmission.The selected relaying UE can be relayed remotely Unicast traffic (including uplink and downlink flow) between UE and network.

As a kind of preferred scheme, after second sets up the execution operation of device 107, this implementation The second device of example also includes the 4th dispensing device (not shown), and first device also includes the Three reception device (not shown).The 4th dispensing device in selected relaying UE is to long-range UE sends relaying monitoring information；3rd reception device of long-range UE is received and comes from the relaying The relaying monitoring information of UE, and according to the relaying monitoring information measure the long-range UE and Channel quality between the relaying UE.

Preferably, the relaying monitoring information is discovery message.

Preferably, the 4th dispensing device of selected relaying UE is periodically to long-range UE Relaying monitoring information is sent, the 3rd reception device periodically its reception of long-range UE is from this After the relaying monitoring information of UE, and the long-range UE is measured according to the relaying monitoring information for receiving With the channel quality (such as D2D link-qualities) between relaying UE.

Preferably, the first device in the preferred scheme also includes that the second gravity concentration apparatus (is schemed not Show).When monitoring that the channel quality is less than predetermined threshold, second gravity treatment of long-range UE Device the first dispensing device 101 of triggering repeats operation to be come again to wide in network coverage Broadcast or multicast relaying finds request message, to reselect relaying UE.

Specifically, when detecting the channel quality between long-range UE and selected relaying UE During the predetermined threshold of region, second gravity concentration apparatus of long-range UE determines that relaying UE is no longer appropriate for As the relaying between long-range UE and network, the second gravity concentration apparatus terminate its service and discharge with Direct communication between current hop UE is connected, and the first dispensing device 101 of triggering is repeated Operation to find request message to broadcast or multicast relaying in network coverage again, with again One relaying UE of selection.

At present, it has been proposed that introduce UE-to-network relayings (relay) to support that covering is prolonged The scheme stretched, that is, the user equipment that long-range UE may be selected in network coverage comes As the relaying UE of the long-range UE, so as to be communicated with network；However, in existing skill In art, long-range UE considers between long-range UE and relaying UE when UE, only in selecting Whether link meets condition, and how to trigger long-range UE gravity treatments relaying UE still under study for action. Present invention finds there is problems with the prior art：1) long-range UE is in selecting after UE During do not consider the wireless access network connection status of candidate relay UE, therefore, it is selected The relaying UE for selecting is likely to be at idle condition, and under the situation, selected relaying UE needs First initiate random access procedure to set up RRC connections, if relaying UE cannot be successfully established RRC between serving BS is connected, then long-range UE must reselect relaying UE, from And service delay can be caused；2) after relaying UE starts service and long-range UE, may be by Link-quality between relaying UE and serving BS is poor, or, due to relaying UE The limitation of itself and cannot continue to serve as the relaying UE of long-range UE, but in the prior art simultaneously The relaying UE gravity treatments under the situation such as this are not supported.

Fig. 4 shows for the structure of the system for selecting relaying UE of another embodiment of the present invention It is intended to.The system includes the long-range UE being located at outside the network coverage and in network coverage Candidate relay UE；Wherein, the long-range UE includes the first dress for selecting relaying UE Put, the first device includes the first dispensing device 101, first receiving device 104, selection dress Put 105, first and set up device 106, the second reception device 109 and the first gravity concentration apparatus 110； Wherein, the candidate relay UE includes second for aided remote UE selection relayings UE Device, the second device includes the 4th reception device 102, the second dispensing device 103, second Set up the dispensing device 108 of device 107 and the 3rd.Wherein, first dispensing device 101, First receiving device 104, selection device 105, first set up device 106, and the 4th receives Device 102, the second dispensing device 103, second are set up device 107 and are given in reference picture 3 To describe in detail, will not be repeated here.

In the present embodiment, set up device 106 and second first and set up device 107 and perform operation Afterwards, the 3rd dispensing device 108 of candidate relay UE, and remotely second reception of UE 109 and first gravity concentration apparatus of device 110 performs the behaviour that operation reselects relaying UE to trigger Make.

When relaying UE gravity treatment trigger conditions are met, relaying UE (namely in being selected as After the candidate relay UE of UE) the 3rd dispensing device 108 send relaying to the long-range UE UE gravity treatment configured informations, relaying UE gravity treatments configured information is by direct communication packet MAC layer control information carry.

For example, Fig. 6 is the MAC PDU forms in one SL-SCH of example of the present invention Schematic diagram, wherein, " MAC Control element 1 " is a newly-increased MAC controls Unit, when relaying UE and detecting its electricity less than predetermined charge value, the of relaying UE Three dispensing devices 108 send relaying UE gravity treatment configured informations, relaying UE to long-range UE Gravity treatment configured information is added in " the MAC Control element 1 " shown in Fig. 6.

Again for example, Fig. 7 is a schematic diagram for the SL-SCH MAC heads of example, its In, " R " represents filler, there is four reserved bits in the sub- head；When relaying UE detections When being less than predetermined threshold to its Uu link-quality, the 3rd dispensing device 108 of relaying UE Relaying UE gravity treatment configured informations are sent to long-range UE, relaying UE gravity treatment configured informations add In adding to the filler shown in Fig. 7.

Again for example, be added to for its Uu link-quality by the 3rd dispensing device 108 of relaying UE In the filler of the head of MAC control information, and by its current electric quantity added to MAC controls In the MAC Control Element increased newly in information, and sent to long-range UE by MAC layer.

Second reception device 109 of long-range UE is received from the direct of selected relaying UE MAC layer control information in communication data packet, comprising relaying in the MAC layer control information UE gravity treatment configured informations.

Specifically, second reception device 109 of long-range UE is received and comes from selected relaying UE Direct communication packet in MAC layer control information, and extract the MAC layer control Relaying UE gravity treatment configured informations entrained by information.

For example, the 3rd dispensing device of relaying UE is added to UE gravity treatment configured informations are relayed In " MAC Control element 1 " shown in Fig. 6, and sent to remote by MAC layer Journey UE；Second reception device 109 of long-range UE is received shown in the Fig. 6 from relaying UE MAC layer control information, and extract the relaying entrained by " MAC Control element 1 " UE gravity treatment configured informations.

Again for example, the 3rd dispensing device 108 of relaying UE will relay UE gravity treatment configured informations Added in first filler shown in Fig. 7, and sent to long-range UE by MAC layer； Second reception device 109 of long-range UE receives the MAC shown in the Fig. 7 from relaying UE Layer control information, and extract entrained relaying UE gravity treatments in first filler and indicate letter Breath.

When determining that needs reselect relaying UE according to the relaying UE gravity treatment configured informations, First gravity concentration apparatus 110 of long-range UE triggers the first dispensing device 101 and repeats to operate Again request message is found to broadcast or multicast relaying in network range.

Wherein, first gravity concentration apparatus 110 of long-range UE can be referred to using various ways according to gravity treatment Show that information determines the need for reselecting relaying UE.

For example, the first gravity concentration apparatus 110 is received from relaying in the second reception device 109 After the relaying UE gravity treatment configured informations of UE, directly determine to need selection relaying UE.

Again for example, first gravity concentration apparatus 110 of long-range UE is according to the relaying UE weights for receiving Select configured information, and preset judgment condition (the D2D chains between such as long-range UE and relaying UE Road quality is less than predetermined threshold), it is determined whether needs reselect relaying UE.

Again for example, first gravity concentration apparatus 110 of long-range UE is according to received relaying UE Gravity treatment configured information and relaying monitoring information, it is determined whether needs reselect relaying UE.

It should be noted that the above-mentioned examples are merely illustrative of the technical solutions of the present invention, and Non- limitation of the present invention, it should be appreciated by those skilled in the art that any when according to the relaying When UE gravity treatment configured informations determine that needs reselect relaying UE, long-range UE repeat steps The implementation of S101, should be included in the scope of the present invention.

It should be noted that the present invention can be in the assembly of software and/or software with hardware by reality Apply, for example, each device of the invention can using application specific integrated circuit (ASIC) or it is any its He is similar to hardware device to realize.In one embodiment, software program of the invention can lead to Computing device is crossed to realize steps described above or function.Similarly, software journey of the invention Sequence (including related data structure) can be stored in computer readable recording medium storing program for performing, example Such as, RAM memory, magnetically or optically driver or floppy disc and similar devices.In addition, this hair Some bright steps or function can employ hardware to realize, for example, as with processor coordinate from And perform the circuit of each step or function.

It is obvious to a person skilled in the art that the invention is not restricted to above-mentioned one exemplary embodiment Details, and without departing from the spirit or essential characteristics of the present invention, can be with it His concrete form realizes the present invention.Therefore, no matter from the point of view of which point, all should be by embodiment Regard exemplary as, and be nonrestrictive, the scope of the present invention is by appended claims Rather than described above limit, it is intended that by fall the equivalency of claim implication and In the range of all changes be included in the present invention.Should not be by any accompanying drawing mark in claim Note is considered as the claim involved by limitation.Furthermore, it is to be understood that " including " word is not excluded for other lists Unit or step, odd number are not excluded for plural number.The multiple units or device stated in system claims Can also be realized by software or hardware by a unit or device.The first, the second grade word Pragmatic represents title, and is not offered as any specific order.

Claims

1. it is a kind of in long-range UE select relaying UE first device, wherein, this first Device includes：

2. first device according to claim 1, wherein, the first device is additionally included in One sets up after device the following device for performing operation：

Second reception device, for receiving the direct communication packet from the relaying UE in MAC layer control information, comprising relaying UE gravity treatment configured informations in the MAC layer control information；

First gravity concentration apparatus, needs to select again when according to relaying UE gravity treatments configured information determination When selecting relaying UE, the first dispensing device of triggering repeats operation.

3. first device according to claim 2, wherein, the relaying UE gravity treatments are indicated Information is added into the filler in the head of the MAC layer control information, and/or, it is described In the MAC Control Element of MAC layer control information.

4. first device according to any one of claim 1 to 3, wherein, first dress Put and be additionally included in first and set up after device the following device for performing operation：

3rd reception device, for receiving the relaying monitoring information from the relaying UE, and root The channel quality between the long-range UE and relaying UE is measured according to the relaying monitoring information；

Wherein, the first device also includes：

Second gravity concentration apparatus, when monitoring that the channel quality is less than predetermined threshold, triggering first Dispensing device repeats operation.

5. it is a kind of to select to relay the second device of UE for aided remote UE, wherein, this second Device includes：

Second dispensing device, for when predetermined relay condition is met, being fed back to the long-range UE The corresponding response message of request message is found with the relaying, wherein, the response message includes The wireless access network connection state information and/or candidate relay UE of candidate relay UE service small with it The frequency information that interval is used；

Wherein, the second device is additionally included in after the feedback device the following device for performing operation：

Second sets up device, for the direct communication set up and between the long-range UE, and sets up With Cellular Networks and the data cube computation of core net, caused as the relaying UE of the long-range UE The long-range UE is communicated by relaying UE with network.

6. second device according to claim 5, wherein, the second device is additionally included in Two set up after device the following device for performing operation：

3rd dispensing device, for when relaying UE gravity treatment trigger conditions are met, to described long-range UE sends relaying UE gravity treatment configured informations, and relaying UE gravity treatments configured information passes through direct communication MAC layer control information in packet is carried.

7. second device according to claim 6, wherein, the relaying UE gravity treatments are indicated Information is added into the filler in the head of the MAC layer control information, and/or, it is described In the MAC Control Element of MAC layer control information.

8. the second device according to any one of claim 5 to 7, wherein, second dress Put and be additionally included in second and set up after device the following device for performing operation：

4th dispensing device, for sending relaying monitoring information to the long-range UE.

9. a kind of for selecting the method for relaying UE in long-range UE, wherein, the method includes：

A. long-range UE is secondary in broadcast or multicast in network coverage extroversion network coverage Existing request message；

B. receive at least one candidate relay UE feedbacks finds that request message is relative with the relaying The response message answered, wherein, the response message includes that the wireless access network of candidate relay UE connects Connect the frequency information used between status information and/or candidate relay UE and its Serving cell；

C. according to the response message, and described long-range UE measured by long-range UE with it is described Link-quality between at least one candidate relay UE, from least one candidate relay UE One candidate relay UE of middle selection as the long-range UE relaying UE；

D. set up and the direct communication between the relaying UE, so that the long-range UE passes through institute Relaying UE is stated to be communicated with network.

10. method according to claim 9, wherein, after the step d, the party Method also includes：

The MAC layer control information in the direct communication packet from the relaying UE is received, Comprising relaying UE gravity treatment configured informations in the MAC layer control information；

When determining that needs reselect relaying UE according to the relaying UE gravity treatment configured informations, Repeating said steps a.

11. methods according to claim 10, wherein, the relaying UE gravity treatments indicate letter Breath is added into the filler in the head of the MAC layer control information, and/or, the MAC In the MAC Control Element of layer control information.

A kind of 12. methods for aided remote UE selection relayings UE, wherein, the method includes：

A receives the relaying from long-range UE and finds request message；

, when predetermined relay condition is met, being found with the relaying to the long-range UE feedbacks please for B The response message that message is corresponding is sought, wherein, the response message includes the nothing of candidate relay UE The frequency used between line access connection state information and/or candidate relay UE and its Serving cell Information；

Wherein, after the step B, the method also includes：

X sets up and the direct communication between the long-range UE, and sets up and Cellular Networks and core net Data cube computation, cause that the long-range UE passes through as the relaying UE of the long-range UE Relaying UE is communicated with network.

13. methods according to claim 12, wherein, after step X, the method is also Including：

When relaying UE gravity treatment trigger conditions are met, relaying UE gravity treatments are sent to the long-range UE Configured information, relaying UE gravity treatments configured information is by the MAC layer in direct communication packet Control information is carried.

14. methods according to claim 13, wherein, the relaying UE gravity treatments indicate letter Breath is added into the filler in the head of the MAC layer control information, and/or, the MAC In the MAC Control Element of layer control information.

A kind of 15. systems for selecting relaying UE, wherein, the system includes being located at the network coverage Long-range UE outside the scope and candidate relay UE in network coverage, it is described long-range UE includes the first device as any one of Claims 1-4, the candidate relay UE Including the second device as any one of claim 5 to 8.