CN103002594A - Establishment method, device and system for direct communication channel - Google Patents
Establishment method, device and system for direct communication channel Download PDFInfo
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- CN103002594A CN103002594A CN2012105167098A CN201210516709A CN103002594A CN 103002594 A CN103002594 A CN 103002594A CN 2012105167098 A CN2012105167098 A CN 2012105167098A CN 201210516709 A CN201210516709 A CN 201210516709A CN 103002594 A CN103002594 A CN 103002594A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The invention discloses an establishment method, device and system for a direct communication channel. The method comprises enabling a first terminal to send a first request for performing direct communication with a second terminal to the second terminal; and enabling the first terminal to receive indications of the second terminal for confirming direct communication, and establishing the wireless communication channel for direct communication between the first terminal and the second terminal. According to the establishment method, device and system for the direct communication channel, the problems occurring when the communication channel for direct communication is established through a relay controller in the prior art are solved, and flexibility and reliability of direct communication are improved.
Description
Technical field
The present invention relates to the communications field, particularly, relate to a kind of direct communication (Device-to-Device, referred to as D2D, abbreviation is straight-through, also claims terminal to lead directly to technology, claims again the equipment room direct communication, its corresponding network can be referred to as straight-forward network, and its corresponding information can be referred to as straight-through information) channel establishing method, Apparatus and system.
Background technology
Wireless communication world has occurred such as local area network (LAN) along with the development of wireless technology is maked rapid progress, the latticed form of the various news such as Internet of Things, and networking is also more and more freely random, is subjected to the time, and the constraint of space and network quality is more and more less.But in the existing communication network architecture, no matter using communication network architecture and the communication pattern of which kind of mode, substantially, all is traditional communication mode.That is to say that terminal follows the external world to carry out any communication activity, send any instruction and all must by system side, carry out to realize alternately with system side.Equipment room direct communication (Device-to-Device abridges straight-through, also claims terminal to lead directly to technology, and corresponding network is called straight-forward network, and corresponding information is referred to as straight-through information) mode is different from traditional radio communication.When adopting equipment room direct communication technology, the wireless signal of transmitting terminal (wireless terminal) directly arrives receiving terminal (another wireless terminal), and does not need the route through core network.Equipment room direct communication technology is not because by the base station interactive information, to greatly save Internet resources, and flexible networking at any time between the terminal, cost reduced, and implement the change of hardware and standard lessly, and will be LTE+(radio communication Long Term Evolution) the most competitive technology.
In two terminal close proximity, if can realize direct communication between the terminal, that is to say that the communication between the terminal directly realizes by " terminal-terminal " a kind of like this direct communication pattern, to shorten call duration time undoubtedly, simplify communication process, significantly conserve network resources is the core network shunting.Particularly when needing to transmit the data of large flow between the terminal of two direct communications, this direct communication pattern just seems more meaningful.In addition, at public safety field, during such as natural calamities such as generation earthquake, tsunamis; covering from the wireless base station has not existed, if at this moment can directly communicate between wireless terminal and the wireless terminal, search-and-rescue work will be more efficient; mean the more property of protection, save more life.
But in the process of the direct communication between apparatus for establishing, in correlation technique, still need to set up by other window machine controllers of base station or similar base station the channel of above-mentioned direct communication, and be its Resources allocation, and in the situation that natural calamity occurs, because the covering from the wireless base station does not exist, so direct communication also just can't be set up at all.
The existing problem of channel for set up direct communication in the correlation technique by window machine controller not yet proposes effective solution at present.
Summary of the invention
The existing problem of channel for set up direct communication in the correlation technique by window machine controller the invention provides a kind of direct access communication channel and sets up scheme, to address the above problem at least.
According to an aspect of the present invention, provide a kind of direct access communication channel method for building up, having comprised: first terminal sends the first request of carrying out direct communication with described the second terminal to the second terminal; Described first terminal receives the indication that described the second terminal check carries out direct communication, and sets up the wireless channel that is used for direct communication between described first terminal and described the second terminal.
Preferably, described first terminal is set up after the channel that is used for described first terminal and described the second terminal direct communication, and also comprise: described first terminal is judged in the coverage of the cellular network that self whether is in normal operation; If so, described first terminal sends the second request to serving BS, and wherein, it is described radio channel allocation physical layer resources that described the second request is used for asking described serving BS; If not, described first terminal selects all or part of physical layer resources corresponding to hardware configuration to distribute to described wireless channel.
Preferably, described serving BS is that the described physical layer resources of described radio channel allocation comprises: described serving BS is the fixing physical layer resources of described radio channel allocation; Perhaps, described serving BS is described radio channel allocation physical layer resources according to scheduling situation and/or resource operating position.
Preferably, described serving BS is according to scheduling situation and/or resource operating position, for the mode of described radio channel allocation physical layer resources comprise following one of at least: described serving BS is distributed to described wireless channel with remaining physical layer resources; Described serving BS with all physical layer resources according to default pro rate to cellular network and described wireless channel; Described serving BS distributes physical layer resources to described wireless channel according to the traffic demand of described wireless channel; Described serving BS is given described wireless channel according to default algorithm assigns physical layer resources.
Preferably, described wireless channel comprises: special uplink channel and downlink dedicated channels.
Preferably, described physical layer resources comprise following one of at least: time interval resource, frequency spectrum resource, time-frequency combined resource.
According to a further aspect in the invention, a kind of direct access communication channel method for building up is provided, comprise: the second terminal receives the first request that first terminal is sent, and wherein, described the first request is used for asking described the second terminal and described first terminal to carry out direct communication; Described the second terminal sends the indication that is used for confirming to carry out direct communication to described first terminal, and sets up the wireless channel that is used for direct communication between described first terminal and described the second terminal.
Preferably, described the second terminal is set up after the wireless channel that is used for described first terminal and described the second terminal direct communication, also comprises: whether described the second terminal judges self is in the coverage of cellular network of normal operation; If so, described the second terminal sends the second request to serving BS, and wherein, it is described radio channel allocation physical layer resources that described the second request is used for asking described serving BS; If not, described the second terminal selects all or part of physical layer resources corresponding to hardware configuration to distribute to described wireless channel.
Preferably, described serving BS is that the described physical layer resources of described radio channel allocation comprises: described serving BS is the fixing physical layer resources of described radio channel allocation; Perhaps, described serving BS is described radio channel allocation physical layer resources according to scheduling situation and/or resource operating position.
Preferably, described serving BS is according to scheduling situation and/or resource operating position, for the mode of described radio channel allocation physical layer resources comprise following one of at least: described serving BS is distributed to described wireless channel with remaining physical layer resources; Described serving BS with all physical layer resources according to default pro rate to cellular network and described wireless channel; Described serving BS distributes physical layer resources to described wireless channel according to the traffic demand of described wireless channel; Described serving BS is given described wireless channel according to default algorithm assigns physical layer resources.
Preferably, described wireless channel comprises: special uplink channel and downlink dedicated channels.
Preferably, described physical layer resources comprise following one of at least: time interval resource, frequency spectrum resource, time-frequency combined resource.
In accordance with a further aspect of the present invention, provide a kind of direct access communication channel apparatus for establishing, be arranged in first terminal, having comprised: the first sending module is used for sending the first request of carrying out direct communication with described the second terminal to the second terminal; The first receiver module is used for receiving the indication that described the second terminal check carries out direct communication; First sets up module, is used for setting up the wireless channel that is used for direct communication between described first terminal and described the second terminal.
Preferably, described device comprises: the first judge module is used for judging in the coverage of the cellular network that self whether is in normal operation; The second sending module, the judged result that is used at described the first judge module is in the situation that is, sends the second request to serving BS, wherein, it is described radio channel allocation physical layer resources that described the second request is used for asking described serving BS; The first distribution module is used in described the first judge module situation that the determination result is NO, selects all or part of physical layer resources corresponding to hardware configuration to distribute to described wireless channel.
In accordance with a further aspect of the present invention, a kind of direct access communication channel apparatus for establishing also is provided, be arranged in the second terminal, comprise: the second receiver module, be used for receiving the first request that first terminal is sent, wherein, described the first request is used for asking described the second terminal and described first terminal to carry out direct communication; The 3rd sending module is used for sending the indication that is used for confirming to carry out direct communication to described first terminal; Second sets up module, is used for setting up the wireless channel that is used for direct communication between described first terminal and described the second terminal.
Preferably, described device also comprises: the second judge module is used for judging in the coverage of the cellular network that self whether is in normal operation; The 4th sending module, the judged result that is used at described the second judge module is in the situation that is, sends the second request to serving BS, wherein, it is described radio channel allocation physical layer resources that described the second request is used for asking described serving BS; The second distribution module is used in described the second judge module situation that the determination result is NO, and described the second terminal selects all or part of physical layer resources corresponding to hardware configuration to distribute to described wireless channel.
Provide a kind of direct access communication channel to set up system also on the one hand according to of the present invention, comprised the above-mentioned direct access communication channel apparatus for establishing that is arranged in first terminal, also comprised the above-mentioned direct access communication channel apparatus for establishing that is arranged in the second terminal.
By the present invention, adopt first terminal to send the first request of carrying out direct communication with the second terminal to the second terminal; First terminal receives the indication that the second terminal check carries out direct communication, and foundation is used for the mode of the wireless channel of direct communication between first terminal and the second terminal, solve the existing problem of channel of setting up direct communication in the correlation technique by window machine controller, improved flexibility and the reliability of direct communication.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the direct access communication channel method for building up of the embodiment of the invention;
Fig. 2 is the structured flowchart according to the direct access communication channel apparatus for establishing of the embodiment of the invention;
Fig. 3 is the preferred structure block diagram according to the direct access communication channel apparatus for establishing of the embodiment of the invention;
Fig. 4 is the flow chart according to the another kind of direct access communication channel method for building up of the embodiment of the invention;
Fig. 5 is the structured flowchart according to the another kind of direct access communication channel apparatus for establishing of the embodiment of the invention;
Fig. 6 is the preferred structure block diagram according to the another kind of direct access communication channel apparatus for establishing of the embodiment of the invention;
Fig. 7 is the structured flowchart of setting up system according to the direct access communication channel of the embodiment of the invention;
Fig. 8 is the network diagram during according to the operation of the cellular network of the embodiment of the invention one;
Fig. 9 is the straight-forward network schematic diagram of the cellular network according to the embodiment of the invention two when not moving;
Figure 10 is the method flow diagram according to the direct communication of the embodiment of the invention three.
Embodiment
Hereinafter also describe in conjunction with the embodiments the present invention in detail with reference to accompanying drawing.Need to prove, in the situation that do not conflict, embodiment and the feature among the embodiment among the application can make up mutually.
Will realize smoothly the equipment room direct communication, primary problem is the assignment problem that will solve channel resource.Be the channel of multiplexing legacy network, still increase new channel and be used for the equipment room direct communication.In order to address this problem, to have proposed to realize the dedicated channel of equipment room direct communication, and used the apparatus and method that this dedicated channel realizes the equipment room direct communication.Thereby solved the channel resource allocation problem of direct communication between UE, direct communication can be carried out in the normal operation of cellular network and the non-existent situation of cellular network smoothly.
A kind of direct communication (D2D) channel establishing method is provided in the present embodiment, and Fig. 1 is that as shown in Figure 1, the method comprises the steps: according to the flow chart of the direct access communication channel method for building up of the embodiment of the invention
Step S102, first terminal send the first request of carrying out direct communication with the second terminal to the second terminal;
Step S104, first terminal receive the indication that the second terminal check carries out direct communication, and set up the wireless channel that is used for direct communication between first terminal and the second terminal.
The present embodiment passes through above-mentioned steps, first terminal another terminal in searching preset range (is described for convenient in the present embodiment, be referred to as the second terminal) after, send the request (being above-mentioned the first request) of carrying out direct communication to this second terminal, after the indication of direct communication is carried out in the affirmation that receives the second terminal, then directly set up wireless channel between first terminal and the second terminal, the mode of setting up of this channel is not passed through the relay and control of core net or even base station, even thereby in the situation that do not exist cellular network to cover, still can set up direct access communication channel, solve the existing problem of channel of setting up direct communication in the correlation technique by window machine controller, improved flexibility and the reliability of direct communication.
Wherein, above-mentioned wireless channel has comprised uplink wireless channel and downlink wireless channel, for example in the situation that send data as up with first terminal to the second terminal, then this wireless channel comprises by first terminal and carries out the up dedicated wireless channel of direct communication and the downlink dedicated wireless channel that is carried out direct communication by the second terminal to first terminal to the second terminal; And in the situation that send data as up with the second terminal to first terminal, then this wireless channel comprises by first terminal and carries out the downlink dedicated wireless channel of direct communication and the up dedicated wireless channel of being carried out direct communication by the second terminal to first terminal to the second terminal.
Preferably, after the direct access communication channel of having set up between first terminal and the second terminal, can cover the distribution of direct access communication channel being carried out physical layer resources according to the current cellular network that whether exists, for example, in the situation in first terminal is judged the coverage of the cellular network self be in normal operation, first terminal can send to its serving BS that to be used for the request service base station be the request (being above-mentioned the second request) that above-mentioned direct access communication channel distributes physical layer resources; Again for example, in the situation in first terminal is judged the coverage of the cellular network self be not in normal operation, (also be hardware configuration corresponding all or part of) physical layer resources that first terminal can be selected to use is distributed to above-mentioned direct access communication channel, for example, first terminal can be with all physical layer resources all for the communication of above-mentioned direct access communication channel.Wherein, the hardware configuration correspondence of terminal corresponding frequency range, the corresponding corresponding physical layer resources of certain frequency range and time domain and flexible configuration thereof.The physical layer resources here has allocation optimum and a general configuration, that is to say that physical layer resources corresponding to UE has dividing of quality.When cellular network did not exist, terminal can preferentially be selected the optimal scheme physical layer resources for above-mentioned wireless channel (also claiming dedicated channel).
First terminal sends the inquiry instruction to base station corresponding to cellular network, as obtains the answer of base station, then can determine self to be in the coverage of cellular network of normal operation; As do not obtain the base station answer, then be not in the cellular network coverage of normal operation.Preferably, serving BS is that the mode of radio channel allocation physical layer resources can be static, also be that serving BS can be that above-mentioned direct access communication channel distributes fixing physical layer resources, also, with fixing frequency and/or fixedly the physical layer resources of time slot distribute to wireless channel; Perhaps, serving BS is that the mode of radio channel allocation physical layer resources can also be dynamic, also is that serving BS can according to scheduling situation and/or resource operating position etc., be the radio channel allocation physical layer resources of above-mentioned direct communication.
Preferably, serving BS dynamically can comprise that for above-mentioned direct access communication channel distributes the mode of physical layer resources following mode one of at least: serving BS is distributed to wireless channel with remaining physical layer resources; Serving BS with all physical layer resources according to default pro rate to cellular network and wireless channel; Serving BS distributes physical layer resources to wireless channel according to the traffic demand of wireless channel; Serving BS according to default algorithm assigns physical layer resources to wireless channel.
Preferably, more convenient with communicating by letter of the second terminal for the ease of first terminal, can be in advance the wireless channel of above-mentioned direct communication be divided into special uplink channel (Physical D2D Uplink Channel, referred to as PDUCH) and downlink dedicated channels (Physical D2D Downlink Channel is referred to as PDDCH).In this way, first terminal and the second terminal can use respectively special uplink channel or downlink dedicated channels to communicate according to the mode of agreement in communication process, thereby can not produce contradiction.
Preferably, for the physical layer resources of radio channel allocation can comprise time slot, frequency spectrum resource, and by the combined resource of any both between time, frequency and the space three, also claim the resource of the types such as time-frequency combined resource.Time interval resource is wherein mainly considered time shaft, and frequency spectrum resource is mainly considered frequency axis, and the time-frequency combined resource is considered the combined resource of time and frequency etc.
Corresponding to said method, a kind of direct communication (D2D) channel apparatus for establishing is provided in the present embodiment, be arranged in first terminal, this device is used for realizing above-described embodiment and preferred implementation, had carried out repeating no more of explanation.As used below, the combination of software and/or the hardware of predetermined function can be realized in term " module ".Although the described device of following examples is preferably realized with software, hardware, perhaps the realization of the combination of software and hardware also may and be conceived.
Fig. 2 is the structured flowchart according to the direct access communication channel apparatus for establishing of the embodiment of the invention, and as shown in Figure 2, this device comprises: the first sending module 22, the first receiver module 24 and first are set up module 26, and the below is elaborated to modules.
The first sending module 22 is used for sending the first request of carrying out direct communication with the second terminal to the second terminal; The first receiver module 24 links to each other with the first sending module 22, is used for receiving the indication that the second terminal check carries out direct communication; First sets up module 26, links to each other with the first receiver module 24, is used for setting up the wireless channel that is used for direct communication between first terminal and the second terminal.
The present embodiment is by above-mentioned module, first terminal another terminal in searching preset range (is described for convenient in the present embodiment, be referred to as the second terminal) after, send the request (being above-mentioned the first request) of carrying out direct communication to this second terminal by the first sending module 22, after the indication of direct communication is carried out in the affirmation that the first receiver module 24 receives the second terminal, then first terminal and the second terminal are set up by first and are directly set up wireless channel between the module 26, the mode of setting up of this channel is not passed through the relay and control of core net or even base station, even thereby in the situation that do not exist cellular network to cover, still can set up direct access communication channel, solve the existing problem of channel of setting up direct communication in the correlation technique by window machine controller, improved flexibility and the reliability of direct communication.
Fig. 3 is the preferred structure block diagram according to the direct access communication channel apparatus for establishing of the embodiment of the invention, as shown in Figure 3, this device can also comprise: the first judge module 32, and set up module 26 and link to each other with first, be used for judging in the coverage of the cellular network that self whether is in normal operation; The second sending module 34 links to each other with the first judge module 32, and the judged result that is used at the first judge module 32 is in the situation that is, sends the second request to serving BS, and wherein, it is the radio channel allocation physical layer resources that the second request is used for the request service base station; The first distribution module 36 links to each other with the first judge module 32, is used in the first judge module 32 situation that the determination result is NO, selects all or part of physical layer resources corresponding to hardware configuration to distribute to wireless channel.
In the present embodiment, also provide another kind of direct communication (D2D) channel establishing method, Fig. 4 is that as shown in Figure 4, the method comprises the steps: according to the flow chart of the another kind of direct access communication channel method for building up of the embodiment of the invention
Step S402, the second terminal receives the first request that first terminal is sent, and wherein, the first request is used for request the second terminal and first terminal carries out direct communication;
Step S404, the second terminal sends the indication that is used for confirming to carry out direct communication to first terminal, and sets up the wireless channel that is used for direct communication between first terminal and the second terminal.
The present embodiment passes through above-mentioned steps, after the second terminal another terminal (routine first terminal described above) in receiving preset range is carried out the request (being above-mentioned the first request) of direct communication, send the indication of confirming to carry out direct communication to this first terminal, then directly set up wireless channel between first terminal and the second terminal, the mode of setting up of this channel is not passed through the relay and control of core net or even base station, even thereby in the situation that do not exist cellular network to cover, still can set up direct access communication channel, solve the existing problem of channel of setting up direct communication in the correlation technique by window machine controller, improved flexibility and the reliability of direct communication.
Preferably, after the direct access communication channel of having set up between first terminal and the second terminal, can cover the distribution of direct access communication channel being carried out physical layer resources according to the current cellular network that whether exists, for example, in the situation in the second terminal judges self is in the coverage of cellular network of normal operation, the second terminal can send to its serving BS that to be used for the request service base station be the request (being above-mentioned the second request) that above-mentioned direct access communication channel distributes physical layer resources; Again for example, in the situation in the second terminal judges self is not in the coverage of cellular network of normal operation, (also be hardware configuration corresponding all or part of) physical layer resources that the second terminal can be selected to use is distributed to above-mentioned direct access communication channel, for example, the second terminal can be with all physical layer resources all for the communication of above-mentioned direct access communication channel.Wherein, the hardware configuration correspondence of terminal corresponding frequency range, the corresponding corresponding physical layer resources of certain frequency range and time domain and flexible configuration thereof.The physical layer resources here has allocation optimum and a general configuration, that is to say that physical layer resources corresponding to UE has dividing of quality.When cellular network did not exist, terminal can preferentially be selected the optimal scheme physical layer resources for above-mentioned wireless channel.
First terminal sends the inquiry instruction to base station corresponding to cellular network, as obtains the answer of base station, then can determine self to be in the coverage of cellular network of normal operation; As do not obtain the base station answer, then be not in the cellular network coverage of normal operation.Preferably, serving BS is that the mode of radio channel allocation physical layer resources can be static, also be that serving BS can be that above-mentioned direct access communication channel distributes fixing physical layer resources, also, with fixing frequency and/or fixedly the physical layer resources of time slot distribute to wireless channel; Perhaps, serving BS is that the mode of radio channel allocation physical layer resources can also be dynamic, also is that serving BS can according to scheduling situation and/or resource operating position etc., be the radio channel allocation physical layer resources of above-mentioned direct communication.
Preferably, serving BS dynamically can comprise that for above-mentioned direct access communication channel distributes the mode of physical layer resources following mode one of at least: serving BS is distributed to wireless channel with remaining physical layer resources; Serving BS with all physical layer resources according to default pro rate to cellular network and wireless channel; Serving BS distributes physical layer resources to wireless channel according to the traffic demand of wireless channel; Serving BS according to default algorithm assigns physical layer resources to wireless channel.
Preferably, more convenient with communicating by letter of the second terminal for the ease of first terminal, can be in advance the wireless channel of above-mentioned direct communication be divided into special uplink channel (PDUCH) and downlink dedicated channels (PDDCH).In this way, first terminal and the second terminal can use respectively special uplink channel or downlink dedicated channels to communicate according to the mode of agreement in communication process, thereby can not produce contradiction.
Preferably, for the physical layer resources of radio channel allocation can comprise time slot, frequency spectrum resource, and by the combined resource of any both between time, frequency and the space three, also claim the resource of the types such as time-frequency combined resource.Time interval resource is wherein mainly considered time shaft, and frequency spectrum resource is mainly considered frequency axis, and the time-frequency combined resource is considered the combined resource of time and frequency etc.
Corresponding to above-mentioned another kind of direct access communication channel method for building up, another kind of direct access communication channel apparatus for establishing also is provided in the present embodiment, be arranged in the second terminal, this device is used for realizing above-described embodiment and preferred implementation, had carried out repeating no more of explanation.As used below, the combination of software and/or the hardware of predetermined function can be realized in term " module ".Although the described device of following examples is preferably realized with software, hardware, perhaps the realization of the combination of software and hardware also may and be conceived.
Fig. 5 is the structured flowchart according to the another kind of direct access communication channel apparatus for establishing of the embodiment of the invention, and as shown in Figure 5, this device comprises: the second receiver module 52, the 3rd sending module 54 and second are set up module 56, and the below is elaborated to modules.
The second receiver module 52 is used for receiving the first request that first terminal is sent, and wherein, the first request is used for request the second terminal and first terminal carries out direct communication; The 3rd sending module 54 links to each other with the second receiver module 52, is used for sending the indication that is used for confirming to carry out direct communication to first terminal; Second sets up module 56, links to each other with the 3rd sending module 54, is used for setting up the wireless channel that is used for direct communication between first terminal and the second terminal.
The present embodiment is by above-mentioned module, the second terminal is after the second receiver module 52 receives another terminal (routine first terminal described above) in the preset range and carries out the request of direct communication (being above-mentioned the first request), send the indication of confirming to carry out direct communication to this first terminal by the 3rd sending module 54, then first terminal and the second terminal are set up by second and are directly set up wireless channel between the module 56, the mode of setting up of this channel is not passed through the relay and control of core net or even base station, even thereby in the situation that do not exist cellular network to cover, still can set up direct access communication channel, solve the existing problem of channel of setting up direct communication in the correlation technique by window machine controller, improved flexibility and the reliability of direct communication.
Fig. 6 is the preferred structure block diagram according to the another kind of direct access communication channel apparatus for establishing of the embodiment of the invention, and as shown in Figure 6, this device can also comprise:
The second judge module 62 is set up module 56 and is linked to each other with second, is used for judging in the coverage of the cellular network that self whether is in normal operation; The 4th sending module 64 links to each other with the second judge module 62, and the judged result that is used at the second judge module 62 is in the situation that is, sends the second request to serving BS, and wherein, it is the radio channel allocation physical layer resources that the second request is used for the request service base station; The second distribution module 66 links to each other with the second judge module 62, is used in the second judge module 62 situation that the determination result is NO, and the second terminal selects all or part of physical layer resources corresponding to hardware configuration to distribute to wireless channel.
In the present embodiment, also provide a kind of direct communication (D2D) channel to set up system, Fig. 7 is the structured flowchart of setting up system according to the direct access communication channel of the embodiment of the invention, as shown in Figure 7, this system comprises the direct access communication channel apparatus for establishing that is arranged in first terminal 20 (describing as an example of Fig. 2 example at Fig. 7) shown in Fig. 2 or 3, also comprises the direct access communication channel apparatus for establishing that is arranged in the second terminal 50 (describing as an example of Fig. 5 example at Fig. 7) shown in Fig. 5 or 6.
Describe below in conjunction with preferred embodiment, following preferred embodiment combines above-described embodiment and preferred implementation thereof.
In following preferred embodiment, a kind of dedicated channel and implementation thereof of terminal direct communication is provided, especially in radio communication, realize the method and apparatus of the dedicated channel allocation of equipment room direct communication during channel resource allocation.By the dedicated channel of equipment room direct communication, and use the apparatus and method that this dedicated channel realizes the equipment room direct communication.Thereby solved the channel resource allocation problem of direct communication between UE.
In following preferred embodiment, at first can set up the dedicated channel of straight-forward network, comprise special uplink channel and downlink dedicated channels.Straight-forward network is used straight-forward network in communication dedicated channel sends and receives information.
Then, if exist cellular network to cover in the communication, then when moving, straight-forward network can dispatch physical layer resources to the channel use of straight-forward network by system side; If cellular network covers and do not exist in the communication, the dedicated channel that then can directly use straight-forward network sends and receives information.
Embodiment one
Fig. 8 is the network diagram during according to the operation of the cellular network of the embodiment of the invention one, and as shown in Figure 8, UE1 and eNB consist of respectively cellular network between UE2 and the eNB; UE1 and UE2 consist of straight-forward network, can directly carry out direct communication each other.Packet domain core network (Evolved Packet Core is referred to as EPC) is core net.ENB and EPC general designation system side.The present embodiment carries out describing as example under the prerequisite that operates in cellular network maintenance proper communication of straight-forward network.
Straight-forward network is used straight-forward network in communication dedicated channel sends and receives information.The dedicated channel of straight-forward network comprises straight-forward network special uplink channel (PDUCH) and straight-forward network downlink dedicated channels (PDDCH).The flow process of setting up can for:
Discovery procedure (can be realized by above-mentioned the first sending module 22 and/or the second receiver module 52): the UE equipment that UE search and finding nearby can carry out direct communication; Receive that perhaps wish that other UE send sets up the request of direct communication.
Affirmation process (can be realized by above-mentioned the first receiver module 24 and/or the 3rd sending module 54): UE finds the direct communication object, confirms the direct communication requirement.
After UE confirmed that direct communication requires, because cellular network keeps proper communication, so UE can send direct communication request (namely above the second request) to eNB.
ENB is after straight-forward network distributes physical layer resources: eNB to receive the request of UE, is straight-through special uplink channel (PDUCH) and straight-through downlink dedicated channels (PDDCH) distribution physical layer resources.
Wherein, above-mentioned distribution physical layer resources can be carried out in the following manner:
Mode one: for direct channel distributes special-purpose fixing frequency spectrum and time slot.This way is applicable in the situation that communication flows is relatively more fixing or flow is less of cellular network.At this moment PUSCH is relative less with the physical layer resources that PDSCH takies, and eNB can distribute more fixing physical layer resources for direct communication.
Mode two: according to scheduling situation and resource operating position, dynamically distribute physical layer resources for straight-forward network.The method of dynamic assignment has multiple, the residue physical layer resources can be distributed to straight-forward network; Such as surplus resources very little, then take with the cellular network mean allocation or the principle of distributing according to a certain percentage; Perhaps the traffic demand according to straight-forward network comes Resources allocation; Also can distribute with certain algorithm.
Straight-through process: UE is under time slot and frequency spectrum condition that eNB distributes, carry out direct communication with other corresponding UE, also be, UE uses the physical layer resources that eNB distributes, set up straight-forward network, carry out direct communication by straight-through special uplink channel (PDUCH) and straight-through downlink dedicated channels (PDDCH).
Embodiment two
Fig. 9 is the straight-forward network schematic diagram of the cellular network according to the embodiment of the invention two when not moving, and as shown in Figure 9, UE1 and eNB consist of respectively cellular network between UE2 and the eNB; UE1 and UE2 consist of straight-forward network, can directly carry out direct communication each other.Packet domain core network (Evolved Packet Core is referred to as EPC) is core net.ENB and EPC general designation system side.When the present embodiment moved with straight-forward network, cellular network communication did not exist or can not carry out describing for example under the prerequisite of proper communication (proper communication interruption) (dotting in the drawings).
The flow process of setting up can for:
Discovery procedure (can be realized by above-mentioned the first sending module 22 and/or the second receiver module 52): the UE equipment that UE search and finding nearby can carry out direct communication.Receive that perhaps wish that other UE send sets up the request of direct communication.
Affirmation process (can be realized by above-mentioned the first receiver module 24 and/or the 3rd sending module 54): after UE finds the direct communication object, send the affirmation request according to the demand of self to the direct communication object, until receive the other side's affirmation request; Perhaps UE directly confirms the direct communication request of the other side UE.Do not exist at cellular network to need not in this case again specific assigned physical layer resources, UE is application specific channel and existing all physical layer resources directly.The hardware configuration correspondence of UE corresponding frequency range, the corresponding corresponding physical layer resources of certain frequency range.The physical layer resources here has allocation optimum and a general configuration, that is to say that physical layer resources corresponding to UE has dividing of quality.UE can preferentially select the optimal scheme physical layer resources for dedicated channel when cellular network does not exist.
Straight-through process: by straight-through dedicated channel, comprise that straight-through special uplink channel (PDUCH) and straight-through downlink dedicated channels (PDDCH) carry out up-downgoing and lead directly to communication between the UE.
Embodiment three
Figure 10 is the method flow diagram according to the direct communication of the embodiment of the invention three, and as shown in figure 10, the method comprises the steps:
Step S1002(discovery procedure), finds other UE, or receive the direct communication request of other UE.
Step S1004(confirms process), confirm direct communication, distribute physical layer resources or use special-purpose physical layer resources corresponding to channel by eNB.
Step S1006(straight-through process), the physical layer resources that the application specific channel is corresponding is carried out direct communication.
In another embodiment, also provide a kind of software, this software be used for to be carried out the technical scheme that above-described embodiment and preferred embodiment are described.
In another embodiment, also provide a kind of storage medium, stored above-mentioned software in this storage medium, this storage medium includes but not limited to CD, floppy disk, hard disk, scratch pad memory etc.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and be carried out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (17)
1. a direct communication D2D channel establishing method is characterized in that, comprising:
First terminal sends the first request of carrying out direct communication with described the second terminal to the second terminal;
Described first terminal receives the indication that described the second terminal check carries out direct communication, and sets up the wireless channel that is used for direct communication between described first terminal and described the second terminal.
2. method according to claim 1 is characterized in that, described first terminal is set up after the channel that is used for described first terminal and described the second terminal direct communication, also comprises:
Described first terminal is judged in the coverage of the cellular network that self whether is in normal operation;
If so, described first terminal sends the second request to serving BS, and wherein, it is described radio channel allocation physical layer resources that described the second request is used for asking described serving BS;
If not, described first terminal selects all or part of physical layer resources corresponding to hardware configuration to distribute to described wireless channel.
3. method according to claim 2 is characterized in that, described serving BS is that the described physical layer resources of described radio channel allocation comprises:
Described serving BS is the fixing physical layer resources of described radio channel allocation; Perhaps,
Described serving BS is described radio channel allocation physical layer resources according to scheduling situation and/or resource operating position.
4. method according to claim 3 is characterized in that, described serving BS is according to scheduling situation and/or resource operating position, for the mode of described radio channel allocation physical layer resources comprise following one of at least:
Described serving BS is distributed to described wireless channel with remaining physical layer resources;
Described serving BS with all physical layer resources according to default pro rate to cellular network and described wireless channel;
Described serving BS distributes physical layer resources to described wireless channel according to the traffic demand of described wireless channel;
Described serving BS is given described wireless channel according to default algorithm assigns physical layer resources.
5. each described method in 4 according to claim 1 is characterized in that, described wireless channel comprises:
Special uplink channel and downlink dedicated channels.
6. each described method in 4 according to claim 1 is characterized in that, described physical layer resources comprise following one of at least: time interval resource, frequency spectrum resource, time-frequency combined resource.
7. a direct communication D2D channel establishing method is characterized in that, comprising:
The second terminal receives the first request that first terminal is sent, and wherein, described the first request is used for asking described the second terminal and described first terminal to carry out direct communication;
Described the second terminal sends the indication that is used for confirming to carry out direct communication to described first terminal, and sets up the wireless channel that is used for direct communication between described first terminal and described the second terminal.
8. method according to claim 7 is characterized in that, described the second terminal is set up after the wireless channel that is used for described first terminal and described the second terminal direct communication, also comprises:
Whether described the second terminal judges self is in the coverage of cellular network of normal operation;
If so, described the second terminal sends the second request to serving BS, and wherein, it is described radio channel allocation physical layer resources that described the second request is used for asking described serving BS;
If not, described the second terminal selects all or part of physical layer resources corresponding to hardware configuration to distribute to described wireless channel.
9. method according to claim 8 is characterized in that, described serving BS is that the described physical layer resources of described radio channel allocation comprises:
Described serving BS is the fixing physical layer resources of described radio channel allocation; Perhaps,
Described serving BS is described radio channel allocation physical layer resources according to scheduling situation and/or resource operating position.
10. method according to claim 9 is characterized in that, described serving BS is according to scheduling situation and/or resource operating position, for the mode of described radio channel allocation physical layer resources comprise following one of at least:
Described serving BS is distributed to described wireless channel with remaining physical layer resources;
Described serving BS with all physical layer resources according to default pro rate to cellular network and described wireless channel;
Described serving BS distributes physical layer resources to described wireless channel according to the traffic demand of described wireless channel;
Described serving BS is given described wireless channel according to default algorithm assigns physical layer resources.
11. each described method in 10 is characterized in that according to claim 7, described wireless channel comprises:
Special uplink channel and downlink dedicated channels.
12. each described method in 10 is characterized in that according to claim 7, described physical layer resources comprise following one of at least: time interval resource, frequency spectrum resource, time-frequency combined resource.
13. a direct communication D2D channel apparatus for establishing is arranged in first terminal, it is characterized in that, comprising:
The first sending module is used for sending the first request of carrying out direct communication with described the second terminal to the second terminal;
The first receiver module is used for receiving the indication that described the second terminal check carries out direct communication;
First sets up module, is used for setting up the wireless channel that is used for direct communication between described first terminal and described the second terminal.
14. device according to claim 13 is characterized in that, described device comprises:
The first judge module is used for judging in the coverage of the cellular network that self whether is in normal operation;
The second sending module, the judged result that is used at described the first judge module is in the situation that is, sends the second request to serving BS, wherein, it is described radio channel allocation physical layer resources that described the second request is used for asking described serving BS;
The first distribution module is used in described the first judge module situation that the determination result is NO, selects all or part of physical layer resources corresponding to hardware configuration to distribute to described wireless channel.
15. a direct communication D2D channel apparatus for establishing is arranged in the second terminal, it is characterized in that, comprising:
The second receiver module is used for receiving the first request that first terminal is sent, and wherein, described the first request is used for asking described the second terminal and described first terminal to carry out direct communication;
The 3rd sending module is used for sending the indication that is used for confirming to carry out direct communication to described first terminal;
Second sets up module, is used for setting up the wireless channel that is used for direct communication between described first terminal and described the second terminal.
16. device according to claim 15 is characterized in that, described device also comprises:
The second judge module is used for judging in the coverage of the cellular network that self whether is in normal operation;
The 4th sending module, the judged result that is used at described the second judge module is in the situation that is, sends the second request to serving BS, wherein, it is described radio channel allocation physical layer resources that described the second request is used for asking described serving BS;
The second distribution module is used in described the second judge module situation that the determination result is NO, and described the second terminal selects all or part of physical layer resources corresponding to hardware configuration to distribute to described wireless channel.
17. a direct communication D2D channel is set up system, comprise such as claim 13 or the 14 described direct access communication channel apparatus for establishing that are arranged in first terminal, also comprise such as claim 15 or the 16 described direct access communication channel apparatus for establishing that are arranged in the second terminal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210516709.8A CN103002594B (en) | 2012-12-05 | 2012-12-05 | Direct access communication channel method for building up, apparatus and system |
| PCT/CN2013/085135 WO2014086204A1 (en) | 2012-12-05 | 2013-10-12 | Method, device and system for establishing device-to-device communication channel |
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| CN201210516709.8A CN103002594B (en) | 2012-12-05 | 2012-12-05 | Direct access communication channel method for building up, apparatus and system |
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| CN103002594B CN103002594B (en) | 2018-10-09 |
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| WO2014086204A1 (en) | 2014-06-12 |
| CN103002594B (en) | 2018-10-09 |
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