CN104936247A

CN104936247A - Method, base station and system used for reselecting relay system

Info

Publication number: CN104936247A
Application number: CN201410103659.XA
Authority: CN
Inventors: 毕奇; 洪伟; 陈鹏; 韩斌
Original assignee: China Telecom Corp Ltd
Current assignee: China Telecom Corp Ltd
Priority date: 2014-03-20
Filing date: 2014-03-20
Publication date: 2015-09-23
Anticipated expiration: 2034-03-20
Also published as: CN104936247B

Abstract

The invention discloses a method, a base station and a system for reselecting a relay system, wherein the base station sends a relay terminal reselection message to a user terminal when the base station determines that the user terminal needs to reselect a relay terminal, and the user terminal is enabled to broadcast a relay request message to adjacent areas; a relay candidate terminal receiving the relay request message sends a relay receiving message to the base station when determining that the relay candidate terminal itself can forward data for the user terminal; the base station select one from the relay candidate terminals sending the relay receiving message as a new relay terminal; and the base station sends a relay connection establishing message to the new relay terminal so as to enable the new relay terminal and the user terminal to establish D2D communication. In addition, the user terminal sends a relay termination request to the base station when determining that the relay service is not needed, direct connection is established between the user terminal and the base station when a relay service termination message is received, and the D2D communication established between the user terminal and the relay terminal is switched off. In this way, the network covering performance is improved, and the user experience is improved.

Description

For the method for gravity treatment link terminal, base station and system

Technical field

The present invention relates to the communications field, particularly a kind of method for gravity treatment link terminal, base station and system.

Background technology

Along with the develop rapidly of wireless communication technology, radio spectrum resources is more and more rare, but meanwhile, user to the speed of network and the successional requirement of the network coverage more and more higher, in limited bandwidth resources, therefore how to realize two-forty and wide covering becomes very important concerning operator.3GPP(3rd Generation Partnership Project, third generation partner program) a kind of novel D2D(Device-to-Device is being discussed, device-to-device) communication technology.By this technology, as shown in Figure 1, directly can communicate under the control of base station between the mobile terminal of close together, avoid the forwarding of base station, thus improve system effectiveness.

But the D2D technology that current 3GPP discusses only simply is limited to a terminal and another one terminal direct communication, can not improve the covering performance of network, and the covering performance of network is for particularly important edge customer.

LTE(Long Term Evolution, Long Term Evolution) introduce relaying (Relay) node to promote the covering performance of network.This via node possesses all functions of base station, but disposing such via node, to need to carry out addressing, cloth station, plant maintenance etc. a series of concerning work that is loaded down with trivial details operator and high expense.

The covering performance that trunk subscriber technology improves network further can also be introduced further based on D2D technology.And avoid above-mentioned loaded down with trivial details work.But because trunk subscriber may move, this trunk subscriber therefore may be caused no longer to be suitably for by trunk subscriber forwarding data, to cause D2D communication quality to decline further, and finally cause systematic function to decline.

Summary of the invention

The embodiment of the present invention provides a kind of method for gravity treatment link terminal, base station and system.When the link-quality of user terminal and current hop terminal is deteriorated, by gravity treatment link terminal, can network covering property be improved, improve the Consumer's Experience of user.

According to an aspect of the present invention, a kind of method for gravity treatment link terminal is provided, comprises:

Base station sends link terminal reselection message to user terminal, so as described user terminal after receiving described link terminal reselection message to neighborhood broadcast relay request message, wherein said user terminal and current hop terminal apparatus for establishing are to devices communicating;

The relaying that described base station receives from relay candidate terminal accepts message, and wherein said relay candidate terminal sends described relaying and accepts message after receiving the described relay request message from described user terminal;

Described base station accepts message according to relaying and selects new link terminal;

Described base station sends relay connection to described new link terminal and sets up message, so as described new link terminal receive described relay connection set up message after with described user terminal apparatus for establishing to devices communicating.

In one embodiment, described base station also comprises after setting up message to described new link terminal transmission relay connection:

Described base station sends relay services end to current hop terminal, communicates with the device-to-device of described user terminal so that current hop terminal disconnects.

In one embodiment, the step that base station sends link terminal reselection message to user terminal comprises:

Described base station, when judging that described user terminal needs gravity treatment link terminal, sends link terminal reselection message to described user terminal.

In one embodiment, relay candidate terminal sends the step that described relaying accepts message and comprises after receiving the described relay request message from described user terminal:

Relay candidate terminal, after receiving described relay request message, according to the judgment criterion preset, judges whether self can be described user terminal forwarding data;

Self can as described user terminal forwarding data if judge, then described relay candidate terminal sends relaying to described base station and accepts message.

In one embodiment, described base station accepts message according to relaying and selects the step of new link terminal to comprise:

When the described base station relaying received from multiple candidate relay terminal accepts message, described base station, according to the Criterion of Selecting preset, selects a relay candidate terminal as new link terminal from described multiple relay candidate terminal.

In one embodiment, described base station is when judging that described user terminal needs gravity treatment link terminal, and the step sending link terminal reselection message to described user terminal comprises:

Described user terminal judge the wireless link signals intensity between self and current hop terminal lower than the relaying gravity treatment threshold value pre-set and the duration exceedes the relaying reselection time window pre-set time, send relaying reselection request to described base station, wherein relaying reselection request comprise the mark of described user terminal, current hop terminal mark, need the type of service of relaying, the wireless link signals intensity between described user terminal and current hop terminal, the speed of described user terminal, the speed of current hop terminal;

After described base station receives relaying reselection request, the parameter comprised according to relaying reselection request and community current network state, judge that described user terminal is the need of gravity treatment link terminal;

If judge, described user terminal needs gravity treatment link terminal, then described base station sends link terminal reselection message to described user terminal.

Current hop terminal judge the wireless link signals intensity between self and described user terminal lower than the relaying gravity treatment threshold value pre-set and the duration exceedes the relaying reselection time window pre-set time, send relaying reselection request to described base station, wherein relaying reselection request comprise the mark of described user terminal, current hop terminal mark, need the type of service of relaying, the wireless link signals intensity between described user terminal and current hop terminal, the speed of described user terminal, the speed of current hop terminal;

Base station judge the wireless link signals intensity between self and current hop terminal lower than the relaying gravity treatment threshold value pre-set and the duration exceedes the relaying reselection time window pre-set time, send link terminal reselection message to described user terminal.

In one embodiment, wireless link signals intensity between described user terminal and current hop equipment is only when being less than the relaying gravity treatment threshold value pre-set, and the wireless link between described user terminal and current hop equipment just can affect the service quality of teleservice;

Wireless link signals intensity between described base station and current hop equipment is only when being less than the relaying gravity treatment threshold value pre-set, and the wireless link between described base station and current hop equipment just can affect the service quality of teleservice.

In one embodiment, relay request message comprise described user terminal mark, need the link signal strength of the type of service of relaying, described user terminal and current hop terminal room, the translational speed of described user terminal.

In one embodiment, relay candidate terminal, after receiving described relay request message, according to the judgment criterion preset, judges whether self can comprise for the step of described user terminal forwarding data:

Relay candidate terminal, after receiving described relay request message, judges whether the battery electric quantity of self is greater than predetermined electricity thresholding;

If the battery electric quantity of self is greater than predetermined electricity thresholding, then described relay candidate terminal judges self can be described user terminal forwarding data; And/or

Relay candidate terminal, after receiving described relay request message, judges whether the translational speed of self is less than predetermined speed threshold;

If the translational speed of self is less than predetermined speed threshold, then described relay candidate terminal judges self can be described user terminal forwarding data; And/or

Relay candidate terminal, after receiving described relay request message, judges whether the wireless link signals intensity of self and described user terminal is greater than predetermined strength threshold;

If the wireless link signals intensity of self and described user terminal is greater than predetermined strength threshold, then described relay candidate terminal judges self can be described user terminal forwarding data.

In one embodiment, relaying accept message comprise the mark of described relay candidate terminal self, the mark of described user terminal, type of service that needs forward, link signal strength between described relay candidate terminal and described user terminal, forward required for resource, the translational speed of described relay candidate terminal self, the translational speed of described user terminal.

In one embodiment, described base station, according to the Criterion of Selecting preset, accepts to select a relay candidate terminal to comprise as the step of new link terminal in the relay candidate terminal of message at transmission relaying:

Described base station accepts according to relaying the parameter that message comprises, and accepts to select service quality the best relay candidate terminal as new link terminal in the relay candidate terminal of message at transmission relaying.

In one embodiment, relay connection set up message comprise forward resource requirement, described new link terminal and described user terminal apparatus for establishing to devices communicating resource requirement.

In one embodiment, described relay candidate terminal sends after relaying accepts message to described base station, also comprises:

The described relay connection whether described relay candidate terminal judges receives the transmission of described base station within predetermined time sets up message;

If the described relay connection not receiving the transmission of described base station within predetermined time sets up message, then described relay candidate terminal is abandoned as described user terminal carries out relaying.

In one embodiment, described user terminal, when judging that the wireless link signals intensity between self and described base station is greater than user's relaying threshold value of pre-setting and the duration exceedes the termination relaying time window pre-set, sends relaying to described base station and stops request;

Described base station, when receiving relaying and stopping request, sends relay services end to described user terminal, is directly connected so that described user terminal is set up with described base station, and disconnection communicates with the device-to-device set up between current hop terminal.

According to a further aspect in the invention, a kind of base station for gravity treatment link terminal is provided, comprises transmitting element, receiving element and selected cell, wherein:

Transmitting element, for sending link terminal reselection message to user terminal, so that described user terminal is to neighborhood broadcast relay request message after receiving described link terminal reselection message, wherein said user terminal and current hop terminal apparatus for establishing are to devices communicating;

Receiving element, accepts message for the relaying received from relay candidate terminal, and wherein relay candidate terminal sends described relaying and accepts message after receiving the described relay request message from described user terminal;

Selected cell, new link terminal is selected for accepting message according to relaying, and indicate transmitting element to send relay connection to described new link terminal to set up message so that described new link terminal receive described relay connection set up message after with described user terminal apparatus for establishing to devices communicating.

In one embodiment, transmitting element also for after setting up message to described new link terminal transmission relay connection, sends relay services end to current hop terminal, communicates so that current hop terminal disconnects with the device-to-device of described user terminal.

In one embodiment, above-mentioned base station also comprises recognition unit, wherein:

Recognition unit, for judging that described user terminal is the need of gravity treatment link terminal, if judge, described user terminal needs gravity treatment link terminal, then indicate transmitting element to send link terminal reselection message to described user terminal.

In one embodiment, selected cell is specifically when the receiving element relaying received from multiple candidate relay terminal accepts message, according to the Criterion of Selecting preset, from described multiple relay candidate terminal, select a relay candidate terminal as new link terminal.

In one embodiment, after the relaying reselection request that recognition unit specifically receives from described user terminal at receiving element, the parameter comprised according to relaying reselection request and community current network state, judge that described user terminal is the need of gravity treatment link terminal; Wherein said user terminal judge the wireless link signals intensity between self and current hop terminal lower than the relaying gravity treatment threshold value pre-set and the duration exceedes the relaying reselection time window pre-set time, send relaying reselection request to described base station, wherein relaying reselection request comprise the mark of described user terminal, current hop terminal mark, need the type of service of relaying, the wireless link signals intensity between described user terminal and current hop terminal, the speed of described user terminal, the speed of current hop terminal;

Transmitting element is also for the judged result according to recognition unit, if judge, described user terminal needs gravity treatment link terminal, then send link terminal reselection message to described user terminal.

In one embodiment, after the relaying reselection request that recognition unit specifically receives from current hop terminal at receiving element, the parameter comprised according to relaying reselection request and community current network state, judge that described user terminal is the need of gravity treatment link terminal; Wherein current hop terminal judge the wireless link signals intensity between self and described user terminal lower than the relaying gravity treatment threshold value pre-set and the duration exceedes the relaying reselection time window pre-set time, send relaying reselection request to described base station, wherein relaying reselection request comprise the mark of described user terminal, current hop terminal mark, need the type of service of relaying, the wireless link signals intensity between described user terminal and current hop terminal, the speed of described user terminal, the speed of current hop terminal;

In one embodiment, recognition unit judge the wireless link signals intensity between base station self and current hop terminal lower than the relaying gravity treatment threshold value pre-set and the duration exceedes the relaying reselection time window pre-set time, instruction transmitting element sends link terminal reselection message to described user terminal.

In one embodiment, selected cell specifically accepts according to relaying the parameter that message comprises, and accepts to select service quality the best relay candidate terminal as new link terminal in the relay candidate terminal of message at transmission relaying.

In one embodiment, transmitting element is also for receiving relaying termination request during at receiving element, relay services end is sent to described user terminal, directly be connected so that described user terminal is set up with described base station, and disconnection communicates with the device-to-device set up between current hop terminal; Wherein said user terminal, when judging that the wireless link signals intensity between self and described base station is greater than user's relaying threshold value of pre-setting and the duration exceedes the termination relaying time window pre-set, sends relaying to described base station and stops request.

According to a further aspect in the invention, provide a kind of system for gravity treatment link terminal, comprise base station, user terminal, current hop terminal and relay candidate terminal, wherein:

Base station, for sending link terminal reselection message to user terminal, accepting message according to the relaying from relay candidate terminal and selecting new link terminal, sends relay connection set up message to described new link terminal;

User terminal, for after receiving the link terminal reselection message from described base station to neighborhood broadcast relay request message;

Current hop terminal, for described user terminal apparatus for establishing to devices communicating;

Relay candidate terminal, accepts message for sending relaying after receiving the relay request message from described user terminal; After receiving and setting up message from the relay connection of described base station, with described user terminal apparatus for establishing to devices communicating.

In one embodiment, base station is the base station that above-mentioned any embodiment relates to.

In one embodiment, current hop terminal also for after the relay services end receiving the transmission of described base station, disconnects and communicating with the device-to-device of described user terminal.

In one embodiment, relay candidate terminal, specifically after receiving described relay request message, according to the judgment criterion preset, judges whether self can be described user terminal forwarding data; If judge, self as described user terminal forwarding data, then can send relaying to described base station and accepts message.

In one embodiment, described user terminal specifically judge the wireless link signals intensity between self and current hop terminal lower than the relaying gravity treatment threshold value pre-set and the duration exceedes the relaying reselection time window pre-set time, send relaying reselection request to described base station, wherein relaying reselection request comprise the mark of described user terminal, current hop terminal mark, need the type of service of relaying, the wireless link signals intensity between described user terminal and current hop terminal, the speed of described user terminal, the speed of current hop terminal.

In one embodiment, current hop terminal specifically judge the wireless link signals intensity between self and described user terminal lower than the relaying gravity treatment threshold value pre-set and the duration exceedes the relaying reselection time window pre-set time, send relaying reselection request to described base station, wherein relaying reselection request comprise the mark of described user terminal, current hop terminal mark, need the type of service of relaying, the wireless link signals intensity between described user terminal and current hop terminal, the speed of described user terminal, the speed of current hop terminal.

In one embodiment, relay candidate terminal, specifically after receiving described relay request message, judges whether the battery electric quantity of self is greater than predetermined electricity thresholding; If the battery electric quantity of self is greater than predetermined electricity thresholding, then judging self can as described user terminal forwarding data; And/or after receiving described relay request message, judge whether the translational speed of self is less than predetermined speed threshold; If the translational speed of self is less than predetermined speed threshold, then judging self can as described user terminal forwarding data; And/or after receiving described relay request message, judge whether the wireless link signals intensity of self and described user terminal is greater than predetermined strength threshold; If the wireless link signals intensity of self and described user terminal is greater than predetermined strength threshold, then judging self can as described user terminal forwarding data.

In one embodiment, described relay candidate terminal also for after accepting message to described base station transmission relaying, judges whether that the described relay connection receiving the transmission of described base station within predetermined time sets up message; If the described relay connection not receiving the transmission of described base station within predetermined time sets up message, then abandon as described user terminal carries out relaying.

In one embodiment, described user terminal also for when judging that the wireless link signals intensity between self and described base station is greater than user's relaying threshold value of pre-setting and the duration exceedes the termination relaying time window pre-set, sending relaying to described base station and stopping request;

Described base station also for when receiving relaying and stopping request, sends relay services end to described user terminal, is directly connected so that described user terminal is set up with described base station, and disconnection communicates with the device-to-device set up between current hop terminal.

The present invention, by when user terminal current hop Terminal Service quality cannot be guaranteed, is user terminal gravity treatment link terminal, thus can improves network covering property, improves the Consumer's Experience of user.

Description of the invention provides in order to example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is in order to principle of the present invention and practical application are better described, and enables those of ordinary skill in the art understand the present invention thus design the various embodiments with various amendment being suitable for special-purpose.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is that in prior art, device-to-device communicates the schematic diagram of an embodiment.

Fig. 2 is the schematic diagram of the present invention for a method embodiment of gravity treatment link terminal.

Fig. 3 is the schematic diagram of the present invention for another embodiment of method of gravity treatment link terminal.

Fig. 4 is the schematic diagram of the present invention for the embodiment in base station of gravity treatment link terminal.

Fig. 5 is the schematic diagram of the present invention for another embodiment of base station of gravity treatment link terminal.

Fig. 6 is the schematic diagram of the present invention for a system embodiment of gravity treatment link terminal.

Fig. 7 a-7c is the schematic diagram of a link terminal gravity treatment of the present invention embodiment.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the present invention and application or use.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

Unless specifically stated otherwise, otherwise positioned opposite, the numerical expression of the parts of setting forth in these embodiments and step and numerical value do not limit the scope of the invention.

Meanwhile, it should be understood that for convenience of description, the size of the various piece shown in accompanying drawing is not draw according to the proportionate relationship of reality.

May not discuss in detail for the known technology of person of ordinary skill in the relevant, method and apparatus, but in the appropriate case, described technology, method and apparatus should be regarded as a part of authorizing specification.

In all examples with discussing shown here, any occurrence should be construed as merely exemplary, instead of as restriction.Therefore, other example of exemplary embodiment can have different values.

It should be noted that: represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to be further discussed it in accompanying drawing subsequently.

Fig. 2 is the schematic diagram of the present invention for a method embodiment of gravity treatment link terminal.Wherein:

Step 201, base station sends link terminal reselection message to user terminal so that described user terminal after receiving described link terminal reselection message to neighborhood broadcast relay request message.

Wherein said user terminal and current hop terminal are set up device-to-device and are communicated.

Preferably, described base station, when judging that described user terminal needs gravity treatment link terminal, sends link terminal reselection message to described user terminal.

Step 202, the relaying that described base station receives from relay candidate terminal accepts message, and wherein said relay candidate terminal sends described relaying and accepts message after receiving the described relay request message from described user terminal.

Preferably, relay candidate terminal, after receiving described relay request message, according to the judgment criterion preset, judges whether self can be described user terminal forwarding data.Self can as described user terminal forwarding data if judge, then described relay candidate terminal sends relaying to described base station and accepts message.

Step 203, described base station accepts message according to relaying and selects new link terminal.

Preferably, when the described base station relaying received from multiple candidate relay terminal accepts message, described base station, according to the Criterion of Selecting preset, selects a relay candidate terminal as new link terminal from described multiple relay candidate terminal.

Step 204, described base station sends relay connection to described new link terminal and sets up message so that described new link terminal receive described relay connection set up message after with described user terminal apparatus for establishing to devices communicating.

Preferably, described base station also comprises after setting up message to described new link terminal transmission relay connection:

Described base station sends relay services end to current hop terminal, communicates with the device-to-device of described user terminal so that current hop terminal disconnects.That is, new link terminal as new current hop terminal for described user terminal provides relay services.

Based on the method for gravity treatment link terminal that the above embodiment of the present invention provides, by when user terminal current hop Terminal Service quality cannot be guaranteed, for user terminal gravity treatment link terminal, thus can network covering property be improved, improve the Consumer's Experience of user.

Fig. 3 is the schematic diagram of the present invention for another embodiment of method of gravity treatment link terminal.Wherein:

Step 301, base station, when judging that user terminal needs gravity treatment link terminal, sends link terminal reselection message to described user terminal.Wherein said user terminal passes through current hop terminal to described base station forwarding service.

Preferably, link terminal reselection message is by L1, MAC(Media Access Control, media interviews control) CE (Control Element, control unit) or RRC(RadioResource Control, wireless heterogeneous networks) signaling sends.

Judge that user terminal is the need of gravity treatment relaying, can be judged by user terminal, current hop terminal or base station.Specific as follows:

In one embodiment, described user terminal judge the wireless link signals intensity between self and current hop terminal lower than the relaying gravity treatment threshold value pre-set and the duration exceedes the relaying reselection time window pre-set time, send relaying reselection request to described base station, wherein relaying reselection request comprise the mark of described user terminal, current hop terminal mark, need the type of service of relaying, the wireless link signals intensity between described user terminal and current hop terminal, the speed of described user terminal, the speed of current hop terminal.

After described base station receives relaying reselection request, the parameter comprised according to relaying reselection request and community current network state, judge that described user terminal is the need of gravity treatment link terminal.If judge, described user terminal needs gravity treatment link terminal, then described base station sends link terminal reselection message to described user terminal.

In another embodiment, current hop terminal judge the wireless link signals intensity between self and described user terminal lower than the relaying gravity treatment threshold value pre-set and the duration exceedes the relaying reselection time window pre-set time, send relaying reselection request to described base station, wherein relaying reselection request comprise the mark of described user terminal, current hop terminal mark, need the type of service of relaying, the wireless link signals intensity between described user terminal and current hop terminal, the speed of described user terminal, the speed of current hop terminal.

In another embodiment, base station judge the wireless link signals intensity between self and current hop terminal lower than the relaying gravity treatment threshold value pre-set and the duration exceedes the relaying reselection time window pre-set time, send link terminal reselection message to described user terminal.

Preferably, above-mentioned relaying gravity treatment threshold value and relaying reselection time window are configured by the RRC signaling of base station broadcast or clean culture.

Here it should be noted that, above-mentioned relaying gravity treatment threshold value can ensure that Radio Link Failure (Radio Link Failure is called for short: RLF), also can not affect the QoS(Quality of Service of customer service, service quality) does not occur user.That is, wireless link signals intensity between described user terminal and current hop equipment is only when being less than the relaying gravity treatment threshold value pre-set, wireless link between described user terminal and current hop equipment just can affect the service quality of teleservice, even Radio Link Failure occurs.Wireless link signals intensity between described base station and current hop equipment is only when being less than the relaying gravity treatment threshold value pre-set, wireless link between described base station and current hop equipment just can affect the service quality of teleservice, even Radio Link Failure occurs.Thus can guarantee that user just can complete relaying gravity treatment before service disruption.

Step 302, described user terminal after receiving link terminal reselection message, to neighborhood broadcast relay request message.

Preferably, relay request message is broadcasted by L1, RRC signaling.

Preferably, relay request message comprise described user terminal mark, need the link signal strength of the type of service of relaying, described user terminal and current hop terminal room, the translational speed of described user terminal.

Step 303, relay candidate terminal, after receiving relay request message, according to the judgment criterion preset, judges whether self can be described user terminal forwarding data.

Such as, relay candidate terminal, after receiving relay request message, judges whether the battery electric quantity of self is greater than predetermined electricity thresholding.If the battery electric quantity of self is greater than predetermined electricity thresholding, then described relay candidate terminal judges self can be described user terminal forwarding data.

Again such as, relay candidate terminal, after receiving relay request message, judges whether the translational speed of self is less than predetermined speed threshold.If the translational speed of self is less than predetermined speed threshold, then described relay candidate terminal judges self can be described user terminal forwarding data.

Again such as, relay candidate terminal, after receiving relay request message, judges whether the wireless link signals intensity of self and described user terminal is greater than predetermined strength threshold.If the wireless link signals intensity of self and described user terminal is greater than predetermined strength threshold, then described relay candidate terminal judges self can be described user terminal forwarding data.

Preferably, the combination of arbitrary form can be carried out to above-mentioned judgement.

In addition, no matter relay candidate terminal is in idle condition (IDLE) or connection status (CONNECTED), all can participate in above-mentioned judgement.

Step 304, self can as described user terminal forwarding data if judge, then described relay candidate terminal sends relaying to described base station and accepts message.

Preferably, relaying accepts message and sends by L1, MAC CE or RRC signaling.

Preferably, relaying accept message comprise the mark of described relay candidate terminal self, the mark of described user terminal, type of service that needs forward, link signal strength between described relay candidate terminal and described user terminal, forward required for resource, the translational speed of described relay candidate terminal self, the translational speed of described user terminal.

Step 305, described base station, according to the Criterion of Selecting preset, accepts to select a relay candidate terminal as new link terminal in the relay candidate terminal of message at transmission relaying.

Preferably, described base station accepts according to relaying the parameter that message comprises, the electricity of such as relay candidate terminal, translational speed, the link signal strength between relay candidate terminal and user terminal, the link signal strength etc. between relay candidate terminal and base station, accept to select service quality the best relay candidate terminal as new link terminal in the relay candidate terminal of message at transmission relaying.

Step 306, described base station sends relay connection to described new link terminal and sets up message, so that described new link terminal and described user terminal apparatus for establishing are to devices communicating, described user terminal passes through described new link terminal to described base station forwarding service.

Preferably, described base station also sends relay services end to the current hop terminal of described user terminal, communicates with the device-to-device of described user terminal so that current hop terminal disconnects.

Preferably, relay connection set up message comprise forward resource requirement, described new link terminal and described user terminal apparatus for establishing to devices communicating resource requirement.

Preferably, described relay candidate terminal sends after relaying accepts message to described base station, also comprises:

The described relay connection whether described relay candidate terminal judges receives the transmission of described base station within predetermined time sets up message.If the described relay connection not receiving the transmission of described base station within predetermined time sets up message, then described relay candidate terminal is abandoned as described user terminal carries out relaying.

That is, if do not receive the confirmation of base station in the given time, then think that oneself is not selected.

Preferably, described user terminal also when judging that the wireless link signals intensity between self and described base station is greater than user's relaying threshold value of pre-setting and the duration exceedes the termination relaying time window pre-set, sending relaying to described base station and stopping request.

That is, if the condition of directly carrying out between user terminal and base station communicating meets, then user terminal cancellation is connected with the D2D of link terminal, then uses common communication mode.

Fig. 4 is the schematic diagram of the present invention for the embodiment in base station of gravity treatment link terminal.As shown in Figure 4, base station can comprise transmitting element 401, receiving element 402 and selected cell 403.Wherein:

Transmitting element 401, for sending link terminal reselection message to user terminal, so that described user terminal is to neighborhood broadcast relay request message after receiving described link terminal reselection message, wherein said user terminal and current hop terminal apparatus for establishing are to devices communicating.

Receiving element 402, accepts message for the relaying received from relay candidate terminal, and wherein relay candidate terminal sends described relaying and accepts message after receiving the described relay request message from described user terminal.

Selected cell 403, new link terminal is selected for accepting message according to relaying, and indicate transmitting element 401 to send relay connection to described new link terminal to set up message so that described new link terminal receive described relay connection set up message after with described user terminal apparatus for establishing to devices communicating.

Based on the base station for gravity treatment link terminal that the above embodiment of the present invention provides, by when user terminal current hop Terminal Service quality cannot be guaranteed, for user terminal gravity treatment link terminal, thus can network covering property be improved, improve the Consumer's Experience of user.

Preferably, transmitting element 401 also for after setting up message to described new link terminal transmission relay connection, sends relay services end to current hop terminal, communicates so that current hop terminal disconnects with the device-to-device of described user terminal.

Fig. 5 is the schematic diagram of the present invention for another embodiment of base station of gravity treatment link terminal.Compared with embodiment illustrated in fig. 4, in the embodiment shown in fig. 5, base station also can comprise recognition unit 501.Wherein:

Recognition unit 501, for judging that described user terminal is the need of gravity treatment link terminal, if judge, described user terminal needs gravity treatment link terminal, then indicate transmitting element to send link terminal reselection message to described user terminal.

Preferably, selected cell 403, specifically when the receiving element relaying received from multiple candidate relay terminal accepts message, according to the Criterion of Selecting preset, selects a relay candidate terminal as new link terminal from described multiple relay candidate terminal.

Preferably, after the relaying reselection request that recognition unit 501 specifically receives from described user terminal at receiving element 402, the parameter comprised according to relaying reselection request and community current network state, judge that described user terminal is the need of gravity treatment link terminal.Wherein said user terminal judge the wireless link signals intensity between self and current hop terminal lower than the relaying gravity treatment threshold value pre-set and the duration exceedes the relaying reselection time window pre-set time, send relaying reselection request to described base station, wherein relaying reselection request comprise the mark of described user terminal, current hop terminal mark, need the type of service of relaying, the wireless link signals intensity between described user terminal and current hop terminal, the speed of described user terminal, the speed of current hop terminal.

Transmitting element 401 is also for the judged result according to recognition unit 501, if judge, described user terminal needs gravity treatment link terminal, then send link terminal reselection message to described user terminal.

Preferably, after the relaying reselection request that recognition unit 501 specifically receives from current hop terminal at receiving element 402, the parameter comprised according to relaying reselection request and community current network state, judge that described user terminal is the need of gravity treatment link terminal; Wherein current hop terminal judge the wireless link signals intensity between self and described user terminal lower than the relaying gravity treatment threshold value pre-set and the duration exceedes the relaying reselection time window pre-set time, send relaying reselection request to described base station, wherein relaying reselection request comprise the mark of described user terminal, current hop terminal mark, need the type of service of relaying, the wireless link signals intensity between described user terminal and current hop terminal, the speed of described user terminal, the speed of current hop terminal.

Preferably, recognition unit 501 judge the wireless link signals intensity between base station self and current hop terminal lower than the relaying gravity treatment threshold value pre-set and the duration exceedes the relaying reselection time window pre-set time, instruction transmitting element 401 sends link terminal reselection message to described user terminal.

Preferably, wireless link signals intensity between described user terminal and current hop equipment is only when being less than the relaying gravity treatment threshold value pre-set, wireless link between described user terminal and current hop equipment just can affect the service quality of teleservice, even Radio Link Failure occurs.

Wireless link signals intensity between described base station and current hop equipment is only when being less than the relaying gravity treatment threshold value pre-set, wireless link between described base station and current hop equipment just can affect the service quality of teleservice, even Radio Link Failure occurs.

Thus use new link terminal can't impact user.

Preferably, selected cell 403 specifically accepts according to relaying the parameter that message comprises, and accepts to select service quality the best relay candidate terminal as new link terminal in the relay candidate terminal of message at transmission relaying.

Preferably, transmitting element 401 is also for receiving relaying termination request during at receiving element 402, send relay services end to described user terminal, be directly connected so that described user terminal is set up with described base station, and disconnection communicates with the device-to-device set up between current hop terminal.Wherein said user terminal, when judging that the wireless link signals intensity between self and described base station is greater than user's relaying threshold value of pre-setting and the duration exceedes the termination relaying time window pre-set, sends relaying to described base station and stops request.

Fig. 6 is the schematic diagram of the present invention for a system embodiment of gravity treatment link terminal.As shown in Figure 6, resident in affiliated subdistrict, base station 601 have multiple user terminal, and wherein user terminal 602 adopts D2D to be connected with link terminal 603, and namely user terminal 302 passes through link terminal 303 to base station 601 forwarding service.Wherein:

Base station 601, for sending link terminal reselection message to user terminal 602, accepting message according to the relaying from relay candidate terminal 604-605 and selecting new link terminal, sends relay connection set up message to described new link terminal.

User terminal 602, for after receiving the link terminal reselection message from described base station 601 to neighborhood broadcast relay request message.

Current hop terminal 603, for described user terminal 602 apparatus for establishing to devices communicating.

Relay candidate terminal 604-605, accepts message for sending relaying after receiving the relay request message from described user terminal; After receiving and setting up message from the relay connection of described base station, with described user terminal apparatus for establishing to devices communicating.

Based on the system for gravity treatment link terminal that the above embodiment of the present invention provides, by when user terminal current hop Terminal Service quality cannot be guaranteed, for user terminal gravity treatment link terminal, thus can network covering property be improved, improve the Consumer's Experience of user.

For brevity, only give two relay candidate terminals in figure 6, those skilled in the art are scrutable, can there is multiple relay candidate terminal in community.

In one embodiment, base station is the base station that in Fig. 4 or Fig. 5, any embodiment relates to.

Preferably, current hop terminal 603 also for after the relay services end receiving the transmission of described base station 601, disconnects and communicating with the device-to-device of described user terminal.

Preferably, relay candidate terminal 604-605, specifically after receiving described relay request message, according to the judgment criterion preset, judges whether self can be described user terminal forwarding data; If judge, self as described user terminal forwarding data, then can send relaying to described base station 601 and accepts message.

Preferably, described user terminal 602 specifically judge the wireless link signals intensity between self and current hop terminal 603 lower than the relaying gravity treatment threshold value pre-set and the duration exceedes the relaying reselection time window pre-set time, send relaying reselection request to described base station 601, wherein relaying reselection request comprise the mark of described user terminal, current hop terminal mark, need the type of service of relaying, the wireless link signals intensity between described user terminal and current hop terminal, the speed of described user terminal, the speed of current hop terminal.

Preferably, current hop terminal 603 specifically judge the wireless link signals intensity between self and described user terminal 602 lower than the relaying gravity treatment threshold value pre-set and the duration exceedes the relaying reselection time window pre-set time, send relaying reselection request to described base station 601, wherein relaying reselection request comprise the mark of described user terminal, current hop terminal mark, need the type of service of relaying, the wireless link signals intensity between described user terminal and current hop terminal, the speed of described user terminal, the speed of current hop terminal.

Preferably, relay candidate terminal 604-605, specifically after receiving described relay request message, judges whether the battery electric quantity of self is greater than predetermined electricity thresholding; If the battery electric quantity of self is greater than predetermined electricity thresholding, then judging self can as described user terminal forwarding data; And/or after receiving described relay request message, judge whether the translational speed of self is less than predetermined speed threshold; If the translational speed of self is less than predetermined speed threshold, then judging self can as described user terminal forwarding data; And/or after receiving described relay request message, judge whether the wireless link signals intensity of self and described user terminal is greater than predetermined strength threshold; If the wireless link signals intensity of self and described user terminal is greater than predetermined strength threshold, then judging self can as described user terminal forwarding data.

Preferably, described relay candidate terminal 604-605 also for after accepting message to described base station transmission relaying, judges whether that the described relay connection receiving the transmission of described base station within predetermined time sets up message; If the described relay connection not receiving the transmission of described base station within predetermined time sets up message, then abandon as described user terminal carries out relaying.

Preferably, described user terminal 602 also for when judging that the wireless link signals intensity between self and described base station is greater than user's relaying threshold value of pre-setting and the duration exceedes the termination relaying time window pre-set, sending relaying and stopping request to described base station 601.

Described base station 601 is also for when receiving relaying and stopping request, relay services end is sent to described user terminal 602, directly be connected so that described user terminal 602 is set up with described base station 601, and the device-to-device set up between disconnect user terminal 602 with current hop terminal 603 communicates.

Below by concrete example, the present invention will be described.As shown in Figure 7a, in this first moment, user 2 forward the data to base station as the trunk subscriber of user 1 for user 1.

Step one: in the second moment, as shown in Figure 7b, because user 2 moves, itself and user 1 are apart from becoming large, therebetween D2D link-quality is deteriorated, and when exceeding the regular hour (T) lower than a threshold value (Threshold), user 2 sends " relaying reselection request " signaling to base station, content comprises active user-relaying (U-R) link-quality, user 2 translational speed etc.Threshold with T can be configured by the RRC signaling of clean culture when setting up D2D and being connected by base station or be configured by the RRC signaling of broadcast.

Step 2: after base station receives this demand signalling, triggers and is carried out trunk subscriber gravity treatment by trunk subscriber.

Step 3: after finding new trunk subscriber 3, base station can send " relay services terminates " signaled former trunk subscriber 2 and disconnect and being connected with the former D2D by trunk subscriber 1, and sends " relay connection foundation " new trunk subscriber of signaled 3 and set up new D2D by trunk subscriber 1 and be connected.

Step 4: in the 3rd moment, as shown in Figure 7 c, the D2D link-quality between user 1 and user 3 is poor compared with the link-quality between user 1 and base station, and user 1 sends to base station " relaying stops request ", and base station confirms that disconnecting D2D connects, then uses traditional approach communication.

By implementing the present invention, following beneficial effect can be obtained:

1, trunk subscriber, trunk subscriber gravity treatment can be triggered according to certain criterion, the stability of Deterministic service by trunk subscriber and base station.

2, trunk subscriber can be triggered according to certain criterion by trunk subscriber and stop request, ensure to be experienced by trunk subscriber performance.

3, there is control ability base station to user's relay selection and termination procedure, ensures the stable of system and performance.

4, the present invention's via node of not needing operator deployment traditional, thus save expense and the workload of operator.

One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can have been come by hardware, the hardware that also can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be read-only memory, disk or CD etc.

Claims

1. for a method for gravity treatment link terminal, it is characterized in that, comprising:

2. method according to claim 1, is characterized in that,

Described base station also comprises after setting up message to described new link terminal transmission relay connection:

3. method according to claim 1, is characterized in that,

The step that base station sends link terminal reselection message to user terminal comprises:

4. method according to claim 1, is characterized in that,

Relay candidate terminal sends the step that described relaying accepts message and comprises after receiving the described relay request message from described user terminal:

5. method according to claim 1, is characterized in that,

Described base station accepts message according to relaying and selects the step of new link terminal to comprise:

6. method according to claim 3, is characterized in that,

Described base station is when judging that described user terminal needs gravity treatment link terminal, and the step sending link terminal reselection message to described user terminal comprises:

7. method according to claim 3, is characterized in that,

8. method according to claim 3, is characterized in that,

9. the method according to any one of claim 6-8, is characterized in that,

Wireless link signals intensity between described user terminal and current hop equipment is only when being less than the relaying gravity treatment threshold value pre-set, and the wireless link between described user terminal and current hop equipment just can affect the service quality of teleservice;

10. method according to claim 4, is characterized in that,

Relay request message comprise described user terminal mark, need the link signal strength of the type of service of relaying, described user terminal and current hop terminal room, the translational speed of described user terminal.

11. methods according to claim 10, is characterized in that,

Relay candidate terminal, after receiving described relay request message, according to the judgment criterion preset, judges whether self can comprise for the step of described user terminal forwarding data:

12. methods according to claim 5, is characterized in that,

Relaying accepts message and comprises the mark of described relay candidate terminal self, the mark of described user terminal, the type of service of needs forwarding, the link signal strength between described relay candidate terminal and described user terminal, resource, the translational speed of described relay candidate terminal self, the translational speed of described user terminal required for forwarding.

13. methods according to claim 12, is characterized in that,

Described base station, according to the Criterion of Selecting preset, accepts to select a relay candidate terminal to comprise as the step of new link terminal in the relay candidate terminal of message at transmission relaying:

14. methods according to claim 1, is characterized in that,

Relay connection is set up message and is comprised forwarding resource requirement, described new link terminal and described user terminal apparatus for establishing to devices communicating resource requirement.

15. methods according to claim 1, is characterized in that,

Described relay candidate terminal sends after relaying accepts message to described base station, also comprises:

16. methods according to claim 1, is characterized in that, also comprise:

Described user terminal, when judging that the wireless link signals intensity between self and described base station is greater than user's relaying threshold value of pre-setting and the duration exceedes the termination relaying time window pre-set, sends relaying to described base station and stops request;

17. 1 kinds for the base station of gravity treatment link terminal, is characterized in that, comprise transmitting element, receiving element and selected cell, wherein:

18. base stations according to claim 17, is characterized in that,

Transmitting element also for after setting up message to described new link terminal transmission relay connection, sends relay services end to current hop terminal, communicates so that current hop terminal disconnects with the device-to-device of described user terminal.

19. base stations according to claim 17, is characterized in that, also comprise recognition unit, wherein:

20. base stations according to claim 17, is characterized in that,

Selected cell, specifically when the receiving element relaying received from multiple candidate relay terminal accepts message, according to the Criterion of Selecting preset, selects a relay candidate terminal as new link terminal from described multiple relay candidate terminal.

21. base stations according to claim 19, is characterized in that,

After the relaying reselection request that recognition unit specifically receives from described user terminal at receiving element, the parameter comprised according to relaying reselection request and community current network state, judge that described user terminal is the need of gravity treatment link terminal; Wherein said user terminal judge the wireless link signals intensity between self and current hop terminal lower than the relaying gravity treatment threshold value pre-set and the duration exceedes the relaying reselection time window pre-set time, send relaying reselection request to described base station, wherein relaying reselection request comprise the mark of described user terminal, current hop terminal mark, need the type of service of relaying, the wireless link signals intensity between described user terminal and current hop terminal, the speed of described user terminal, the speed of current hop terminal;

22. base stations according to claim 19, is characterized in that,

After the relaying reselection request that recognition unit specifically receives from current hop terminal at receiving element, the parameter comprised according to relaying reselection request and community current network state, judge that described user terminal is the need of gravity treatment link terminal; Wherein current hop terminal judge the wireless link signals intensity between self and described user terminal lower than the relaying gravity treatment threshold value pre-set and the duration exceedes the relaying reselection time window pre-set time, send relaying reselection request to described base station, wherein relaying reselection request comprise the mark of described user terminal, current hop terminal mark, need the type of service of relaying, the wireless link signals intensity between described user terminal and current hop terminal, the speed of described user terminal, the speed of current hop terminal;

23. base stations according to claim 19, is characterized in that,

Recognition unit judge the wireless link signals intensity between base station self and current hop terminal lower than the relaying gravity treatment threshold value pre-set and the duration exceedes the relaying reselection time window pre-set time, instruction transmitting element sends link terminal reselection message to described user terminal.

24. base stations according to any one of claim 21-23, is characterized in that,

25. base stations according to claim 17, is characterized in that,

26. base stations according to claim 25, is characterized in that,

Selected cell specifically accepts according to relaying the parameter that message comprises, and accepts to select service quality the best relay candidate terminal as new link terminal in the relay candidate terminal of message at transmission relaying.

27. base stations according to claim 17, is characterized in that,

28. base stations according to claim 17, is characterized in that,

Transmitting element is also for receiving relaying termination request during at receiving element, relay services end is sent to described user terminal, directly be connected so that described user terminal is set up with described base station, and disconnection communicates with the device-to-device set up between current hop terminal; Wherein said user terminal, when judging that the wireless link signals intensity between self and described base station is greater than user's relaying threshold value of pre-setting and the duration exceedes the termination relaying time window pre-set, sends relaying to described base station and stops request.

29. 1 kinds, for the system of gravity treatment link terminal, is characterized in that, comprise base station, user terminal, current hop terminal and relay candidate terminal, wherein:

30. systems according to claim 29, is characterized in that,

The base station that base station relates to any one of claim 17-28.

31. systems according to claim 30, is characterized in that,

Current hop terminal also for after the relay services end receiving the transmission of described base station, disconnects and communicating with the device-to-device of described user terminal.

32. systems according to claim 30, is characterized in that,

Relay candidate terminal, specifically after receiving described relay request message, according to the judgment criterion preset, judges whether self can be described user terminal forwarding data; If judge, self as described user terminal forwarding data, then can send relaying to described base station and accepts message.

33. systems according to claim 30, is characterized in that,

Described user terminal specifically judge the wireless link signals intensity between self and current hop terminal lower than the relaying gravity treatment threshold value pre-set and the duration exceedes the relaying reselection time window pre-set time, send relaying reselection request to described base station, wherein relaying reselection request comprise the mark of described user terminal, current hop terminal mark, need the type of service of relaying, the wireless link signals intensity between described user terminal and current hop terminal, the speed of described user terminal, the speed of current hop terminal.

34. systems according to claim 30, is characterized in that,

Current hop terminal specifically judge the wireless link signals intensity between self and described user terminal lower than the relaying gravity treatment threshold value pre-set and the duration exceedes the relaying reselection time window pre-set time, send relaying reselection request to described base station, wherein relaying reselection request comprise the mark of described user terminal, current hop terminal mark, need the type of service of relaying, the wireless link signals intensity between described user terminal and current hop terminal, the speed of described user terminal, the speed of current hop terminal.

35. systems according to claim 30, is characterized in that,

Relay candidate terminal, specifically after receiving described relay request message, judges whether the battery electric quantity of self is greater than predetermined electricity thresholding; If the battery electric quantity of self is greater than predetermined electricity thresholding, then judging self can as described user terminal forwarding data; And/or after receiving described relay request message, judge whether the translational speed of self is less than predetermined speed threshold; If the translational speed of self is less than predetermined speed threshold, then judging self can as described user terminal forwarding data; And/or after receiving described relay request message, judge whether the wireless link signals intensity of self and described user terminal is greater than predetermined strength threshold; If the wireless link signals intensity of self and described user terminal is greater than predetermined strength threshold, then judging self can as described user terminal forwarding data.

36. systems according to claim 30, is characterized in that,

Described relay candidate terminal also for after accepting message to described base station transmission relaying, judges whether that the described relay connection receiving the transmission of described base station within predetermined time sets up message; If the described relay connection not receiving the transmission of described base station within predetermined time sets up message, then abandon as described user terminal carries out relaying.

37. systems according to claim 30, is characterized in that, also comprise:

Described user terminal also for when judging that the wireless link signals intensity between self and described base station is greater than user's relaying threshold value of pre-setting and the duration exceedes the termination relaying time window pre-set, sending relaying to described base station and stopping request;