CN104144519A - Method and device for device-to-device communication - Google Patents
Method and device for device-to-device communication Download PDFInfo
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- CN104144519A CN104144519A CN201310172979.6A CN201310172979A CN104144519A CN 104144519 A CN104144519 A CN 104144519A CN 201310172979 A CN201310172979 A CN 201310172979A CN 104144519 A CN104144519 A CN 104144519A
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Abstract
The embodiment of the invention relates to a method and device for device-to-device communication. When two sets of user equipment in a cellular communication system need to execute D2D communication with each other, a base station of the cellular communication system can distribute resources originally used for cellular communication as the resources for D2D communication, for example, communication bandwidth and carrier frequency, and then the user equipment can utilize the resources distributed by the base station to execute D2D communication. In this way, a D2D link and a cellular link can be multiplexed flexibly in a frequency domain, and the problems of power imbalance, in-band interference and the like in D2D communication are solved while compatibility and cost are taken into consideration.
Description
Technical field
Embodiments of the invention relate to the communication technology, more specifically, relate to equipment in the cellular communication system method and apparatus to devices communicating.
Background technology
The equipment that proposed to equipment (Device-to-Device, D2D) communication mechanism using the enhancing as to cellular communication systems such as such as Long Term Evolutions (Long Term Evolution).In D2D communication, between the subscriber equipment (UE) closing on each other, conventionally there is high-quality communication channel, and therefore can be with higher data transfer rate direct communication.D2D communication can realize many benefits, such as the live load that alleviates base station (BS).
The transmission mechanism of frequency division multiplexing is provided such as a lot of cellular communications networks of LTE, for to multiple subscriber equipmenies the transfer of data on cellular link multiplexing at frequency domain.In D2D communication is attached to this type of communication system time, expectation be the superperformance that can retain frequency division multiplexing.But the power imbalances between D2D link and cellular link may cause the two effectively to coexist.Taking LTE system as example, frequency domain can be divided into multiple Resource Block (RB).For example, the band width of each RB can be 180Kz, and can have 12 subcarriers.The channel width of supposing cellular communication system is 20MHz, and each subscriber equipment can utilize 1 to 100 RB to carry out transfer of data.In the ideal case, different subcarriers is orthogonal, and making to be assigned to can phase mutual interference between the subscriber equipment of different RB in frequency.But in practice, due to the problem such as the frequency shift (FS) that may exist in the hardware in transceiver, PA be non-linear, the orthogonality of distributing between the subcarrier of different user devices may be destroyed.This situation is called as Power leakage.May disturb closing on the subscriber equipment in RB from the power leakage of a subscriber equipment, this phenomenon is called in band to be disturbed.
In the time that D2D link is incorporated to cellular communication system, base station may be for carrying out the larger power of user equipment allocation of uplink, the power that it may use considerably beyond D2D link on cellular link.This power imbalances may cause disturbing in serious band, thus make desired signal in D2D link by cellular link the signal with the subscriber equipment of high-power communication flood.Therefore,, even if be that D2D link and cellular link distribute the orthogonal resource in frequency domain, be also difficult to ensure effectively coexisting of D2D link and cellular link.
Based on above-mentioned discussion, in this area, need a kind of more efficiently scheme of the communication of the D2D for supporting cellular communication system.
Summary of the invention
In order to overcome the problems referred to above of the prior art, the present invention proposes a kind of method and apparatus for D2D communication.
In one aspect of the invention, provide a kind of first user equipment place in cellular communication system for carrying out the method for equipment (D2D) being communicated by letter with the equipment of the second subscriber equipment of this cellular communication system.The method comprises: obtain the resource allocation information for this D2D communication, this resource allocation information is determined by the base station in this cellular communication system and at least instruction is used for this D2D communication dedicated channel bandwidth and carrier frequency; And utilize the indicated resource of this resource allocation information to carry out this D2D communication.
In another aspect of this invention, a kind of method that provides base station place in cellular communication system for the equipment of supporting between first user equipment and second subscriber equipment of this cellular communication system, equipment (D2D) to be communicated by letter.The method comprises: receive the request for this D2D communication from this first user equipment; In response to this request, determine whether to allow this D2D between this first user equipment and this second subscriber equipment to communicate by letter; And be allowed in response to this D2D communication, sending the resource allocation information for this D2D communication to this first user equipment, this resource allocation information is at least indicated dedicated channel bandwidth and the carrier frequency for this D2D communication.
In still another aspect of the invention, provide a kind of first user equipment place in cellular communication system for carrying out the device of equipment (D2D) being communicated by letter with the equipment of the second subscriber equipment of this cellular communication system.This device comprises: acquiring unit, is configured to obtain the resource allocation information for this D2D communication, this resource allocation information is determined by the base station in this cellular communication system and at least instruction is used for this D2D communication dedicated channel bandwidth and carrier frequency; And D2D communication unit, be configured to utilize the indicated resource of this resource allocation information to carry out this D2D communication.The embodiment of this respect also comprises the subscriber equipment that comprises this device.
Of the present invention more on the one hand, the device that provides a kind of base station place in cellular communication system for the equipment of supporting between first user equipment and second subscriber equipment of this cellular communication system, equipment (D2D) to be communicated by letter.This device comprises: receiving element, is configured to receive the request for this D2D communication from this first user equipment; Check and approve unit, be configured in response to this request, determine whether to allow this D2D between this first user equipment and this second subscriber equipment to communicate by letter; And resource allocation unit, be configured to be allowed in response to this D2D communication, send the resource allocation information for this D2D communication to this first user equipment, this resource allocation information is at least indicated dedicated channel bandwidth and the carrier frequency for this D2D communication.The embodiment of this respect also comprises the base station that comprises this device.
By below describing and will be understood that, according to embodiments of the invention, in the time will carrying out D2D communication between two subscriber equipmenies in the radio honeycomb communication system such as LTE, can be used in from original resource for cellular communication point the resource (for example, communication bandwidth and carrier frequency) that this D2D communicates by letter by the base station of cellular communication system.Subscriber equipment can utilize the resource that base station is distributed to carry out D2D communication then.In this way, can in frequency domain, carry out multiplexing to D2D link and cellular link neatly.Especially, according to some embodiment, the communication bandwidth that base station is distributed can be for example the predetermined channel bandwidth specifying in cellular system.Because subscriber equipment is equipped with the filter for these predetermined channel bandwidth conventionally, therefore can carry out effective switching and multiplexing to these filters, to eliminate the problem such as power imbalances and the interior interference of band in D2D communication.And embodiments of the invention and existing base station and subscriber equipment have good compatibility, and be that cost is effective.
Brief description of the drawings
Read detailed description below by reference to accompanying drawing, above-mentioned and other objects of the embodiment of the present invention, feature and advantage will become easy to understand.In the accompanying drawings, show some embodiment of the present invention in exemplary and nonrestrictive mode, wherein:
Fig. 1 shows embodiments of the invention and can be implemented in the schematic block diagram of environment wherein;
Fig. 2-Fig. 4 shows the schematic diagram distributing according to the resource for D2D communication of the embodiment of the present invention;
Fig. 5 shows according to the indicative flowchart of the method for D2D communication of exemplary embodiment of the present invention;
Fig. 6 shows according to the indicative flowchart of the method for D2D communication of exemplary embodiment of the present invention;
Fig. 7 shows according to the schematic block diagram of the device for D2D communication of exemplary embodiment of the present invention; And
Fig. 8 shows according to the schematic block diagram of the device for D2D communication of exemplary embodiment of the present invention.
In each accompanying drawing, identical or corresponding label represents identical or corresponding part.
Embodiment
Some exemplary embodiments are below with reference to the accompanying drawings described principle of the present invention and spirit.Should be appreciated that describing these embodiment is only used to make those skilled in the art can understand better and then realize the present invention, and not limit the scope of the invention by any way.
General thought of the present invention is: in the time will carrying out D2D communication between two subscriber equipmenies in the radio honeycomb communication system such as LTE, can be used in from original resource for cellular communication point the resource (for example, private communication bandwidth and carrier frequency) that this D2D communicates by letter by the base station of cellular communication system.Subscriber equipment can utilize the resource that base station is distributed to carry out D2D communication then.In this way, can in frequency domain, carry out multiplexing to D2D link and cellular link neatly.Especially, according to some embodiment, the communication bandwidth that base station is distributed can be for example the predetermined channel bandwidth specifying in cellular system.Because subscriber equipment is equipped with the filter for these predetermined channel bandwidth conventionally, therefore can carry out effective switching and multiplexing to these filters, to eliminate the problem such as power imbalances and the interior interference of band in D2D communication.And embodiments of the invention and existing base station and subscriber equipment have good compatibility, and be that cost is effective.
Below first with reference to figure 1, it shows embodiments of the invention and can be implemented in the schematic block diagram of cellular communication system 100 wherein.As shown in Figure 1, cellular communication system can comprise one or more subscriber equipment 101-1,101-2 ... 101-n (can be referred to as below " subscriber equipment 101 ") and one or more base station 102.Note, although only show in the drawings a base station 102, scope of the present invention is not limited to the number of base station.Subscriber equipment 101 can be carried out cellular communication according to the various suitable agreements such as such as LTE or standard with base station 102.
Traditionally, when two subscriber equipmenies in system 100 (for example, subscriber equipment 101-1 and subscriber equipment 101-2) carry out D2D while communicating by letter, for example, if other subscriber equipment (, subscriber equipment 101-3) larger with the power of communications of base station 102 on cellular link, may cause the interference to D2D link.According to embodiments of the invention, this defect can be overcome effectively.
Particularly, according to embodiments of the invention, two subscriber equipmenies (for example subscriber equipment 101-1 and subscriber equipment 101-2) that close on are each other wished direct communication each other now, and any one in these two subscriber equipmenies can be sent D2D communication request to base station 102.For the purpose of discussing conveniently, suppose in the following description to initiate D2D communication request by subscriber equipment 101-1.According to embodiments of the invention, this D2D communication request can comprise subscriber equipment 101-1 and subscriber equipment 101-2 unique identifier separately.Alternatively, this D2D communication request can also comprise the data volume that expection will be transmitted on the D2D link between subscriber equipment 101-1 and subscriber equipment 101-2.D2D communication request can also comprise other any and D2D relevant information of communicating by letter, and scope of the present invention is unrestricted in this regard.
After receiving D2D request, first base station 102 can determine whether subscriber equipment 101-1 and subscriber equipment 101-2 are applicable to carrying out D2D and communicate by letter.For example, can one or morely communicate by letter because usually determining whether to allow subscriber equipment 101-1 and subscriber equipment 101-2 to carry out D2D based on following in base station 102: the transmitted data amount whether enough closely characteristic of distance (), subscriber equipment 101-1 and/or subscriber equipment 101-2 between subscriber equipment 101-1 and subscriber equipment 101-2 and/or state, D2D comprise in asking, etc.
Allow D2D communication if base station 102 is determined, the resource that is used in this D2D communication can correspondingly be divided in base station 102.According to some embodiment of the present invention, the resource that can communicate by letter for D2D according to predetermined regular allocation in base station 102.For example, taking LTE Frequency Division Duplexing (FDD) (FDD) pattern as example, can communicate by letter with allocation of carriers some specific bandwidth of selecting in advance in up link (UL) channel width in base station 102 to D2D.Alternatively or additionally, the resource that is used in D2D communication also can dynamically be divided according to the current communication conditions in cellular communication system 100 for example in base station 102.For example, in certain embodiments, in the D2D request from subscriber equipment, can comprise anticipatory data transmission quantity.In these embodiments, resource can dynamically be selected according to this transmitted data amount in base station 102.For example, at present channel width and the corresponding carrier frequency of available the most applicable this volume of transmitted data can be selected in base station 102.The device characteristics of subscriber equipment 101-1 and/or subscriber equipment 101-2 and/or current state can be included into consideration equally.
According to some embodiment of the present invention, the channel width of distributing to D2D communication can be from UL bandwidth, for example UL bandwidth in LTE fdd mode.Especially, according to some embodiment of the present invention, the channel width of distributing to D2D communication is special.In other words, it will only be used to D2D communication and is no longer used to any communication on cellular link.Other channel widths in cellular system still can be used for cellular communication.
According to some embodiment of the present invention, the channel width of being distributed to D2D communication by base station 102 can be one of preset channel bandwidth of regulation in cellular communication system 100.As an example, in LTE system, specify at present six available different channels bandwidth, as shown in the table.In order to communicate by letter in LTE system, each subscriber equipment is equipped with corresponding simulation and/or digital filter conventionally, for for these six channel widths, the data of sending and receiving being processed, thereby reduces to disturb in power leakage and band.According to some embodiment of the present invention, can be used in to point in these predetermined channel bandwidth D2D communication, this will be explained below.
| Channel width (MHz) | Resource block number |
| 1.4 | 6 |
| 3 | 15 |
| 5 | 25 |
| 10 | 50 |
| 15 | 75 |
| 20 | 100 |
Alternatively, base station 102 can also be identified for execution cycle and/or the number of times of D2D communication.For example, according to some embodiment of the present invention, the D2D communication of base station 102 between can designated user equipment was regularly carried out according to the specific cycle.In this way, contribute to reduce the expense of control signal.
Next, base station 102 generates resource allocation information, and this resource allocation message is for being distributed to the resource of D2D communication by base station 102 to subscriber equipment instruction.This resource allocation information is for example sent in the mode of signaling message the subscriber equipment 101-1 that initiates D2D communication request from base station 102.As mentioned above, according to embodiments of the invention, the resource allocation message that base station 102 generates at least can be indicated private communication bandwidth and the carrier frequency for D2D communication.According to some optional embodiment, this resource allocation information can also be indicated execution cycle and the number of times of D2D communication, etc.
According to some embodiment of the present invention, except sending resource allocation message to subscriber equipment 101-1, base station 102 can also send to resource allocation information subscriber equipment 101-2.Alternatively or additionally, this resource allocation information also can be forwarded to subscriber equipment 101-2 by subscriber equipment 101-1, instead of directly sends to subscriber equipment 101-2 by base station 102.
After base station 102 receives resource allocation information, subscriber equipment 101-1 utilizes resource indicated in resource allocation information directly to carry out D2D with subscriber equipment 101-2 and communicates by letter.Especially, as mentioned above, the channel width of distributing can be one of predetermined channel bandwidth of regulation in cellular communication system 100.Now, the subscriber equipment in D2D communication can utilize the various simulations and/or the digital filter that originally design for cellular communication to process the data that will transmit on D2D link.Still consider LTE system, as mentioned above, the subscriber equipment moving in this type systematic is all equipped with for example, filter for the predetermined channel bandwidth of LTE system defined (, six predetermined frequency bands shown in upper table) conventionally.In this case, subscriber equipment 101-1 and subscriber equipment 101-2 can be respectively to previously switching for the filter of cellular communication.Filter after switching is used to process the data of transmission in D2D communication.For example, when send data on D2D link time, subscriber equipment can utilize the filter after switching to reduce less desirable transmitting; When receive data on D2D link time, can utilize the power leakage in the filter refusal adjacent channel after switching.In this way, can effectively utilize the existing hardware device of subscriber equipment and eliminate the interference that the power leakage on cellular link causes D2D link, and without increasing too much hardware cost.Therefore, embodiments of the invention and existing base station and subscriber equipment have good compatibility, and are that cost is effective.
According to embodiments of the invention, in the channel width of utilizing base station 102 to distribute at subscriber equipment 101-1 and subscriber equipment 101-2 communicates, other channel widths in cellular communication system 100 are still preserved for cellular link.In other words, the subscriber equipment including subscriber equipment 101-1 and subscriber equipment 101-2 still can carry out normal cellular communication with base station 102.Below with reference to Fig. 2, a concrete example is described.
In the embodiment shown in Figure 2, suppose that available uplink (UL) and down link (DL) channel width in cellular system 100 are respectively 20MHz.According to the D2D communication request from subscriber equipment 101-1, the 3MHz in UL channel width for example can be distributed to D2D communication in base station 102.Now, in D2D communication cycle, subscriber equipment 101-1 can utilize the channel width of this 3MHz to carry out D2D with subscriber equipment 101-2 and communicate by letter.Now, each subscriber equipment still can utilize the UL channel width of other 17MHz to carry out and the cellular communication of base station 102.And former DL channel width (20MHz) is unaffected.In other words, each subscriber equipment including the subscriber equipment in D2D communication can be monitored the communication from base station 102, the message of for example signaling and so on cellular link.
Note that in cellular communication system 100, can exist arbitrarily subscriber equipment is carried out to D2D communication.For example, carry out in D2D communicates by letter at subscriber equipment 101-1 and subscriber equipment 101-2, subscriber equipment 101-3 can carry out D2D to base station 102 requests with 101-4 and communicate by letter.Now, subscriber equipment 101-3 and 101-4 can be according to above communicating by letter with base station 102 for the described similar fashion of subscriber equipment 101-1 and 101-2, and obtain the corresponding D2D communication resource.For example, base station 102 can be the D2D allocation of communications carrier frequency f between subscriber equipment 101-1 and 101-2
1, and the channel width of distributing 3MHz.Meanwhile, base station 102 is also the D2D allocation of communications carrier frequency f between subscriber equipment 101-3 and subscriber equipment 101-4
2and the channel width of 5MHz.
Now, subscriber equipment 101-1 uses the 3MHz channel width of distributing to carry out D2D with 101-2 and communicates by letter, and uses the 5MHz channel width of distributing to communicate by letter between subscriber equipment 101-3 and subscriber equipment 101-4.If still suppose that the available channel bandwidth of the FDD UL in cellular communication system is 20MHz, in D2D communication cycle, in cellular communication system 100, each subscriber equipment can use the FDD UL bandwidth of remaining 12MHz (=20MHz-3MHz-5MHz) to retain for cellular communication, as shown in Figure 3.
Especially, according to some embodiment of the present invention, the resource of distributing to D2D communication can take whole channel width.For example, continue in above-described example, can for subscriber equipment 101-1 communicate by letter with the D2D of 101-2 and subscriber equipment 101-3 and 101-4 between D2D communicate by letter and distribute respectively the FDD DL bandwidth of 10MHz.Thus, as shown in Figure 4, in D2D communication cycle, all channel widths of the FDD UL of LTE are all used to D2D communication, do not have remaining bandwidth to can be used for cellular communication.Certainly, FDD DL frequency band still can be used for monitoring the communication from base station 102 by subscriber equipment.
Note that in the embodiment shown in Fig. 2-Fig. 4, the D2D communication between subscriber equipment is regularly to carry out according to definite cycle of base station 102.It is useful doing like this, for example, can reduce signaling consumption, but is not necessary.According to some alternative, the interval between the D2D communication execution cycle can be different.For example, base station 102 can when can carry out between explicitly control appliance D2D communication by signaling.Scope of the present invention is unrestricted in this regard.
It shall yet further be noted that it is only exemplary describing above.In the situation that not departing from spirit of the present invention and thought, can make various amendments and replacement to embodiments of the invention.For example, thought proposed by the invention and principle are equally applicable to time division duplex (TDD) communication system.For example, D2D communication can be carried out at the ascending time slot of LTE TDD, for example, use the some or all of bandwidth of a time slot.
With reference now to Fig. 5,, it shows according to the flow chart of the method 500 for D2D communication of the embodiment of the present invention.According to embodiments of the invention, method 500 can be carried out in user equipment side.For set forth clear for the purpose of, carry out the subscriber equipment of the method and be called as first user equipment, and be called as the second subscriber equipment with another subscriber equipment that first user equipment communicates based on D2D link.
As shown in Figure 5, after method 500 starts, at step S501, obtain the resource allocation information for communicating by letter with the D2D of the second subscriber equipment.According to embodiments of the invention, this resource allocation information is determined by the base station in cellular communication system, and dedicated channel bandwidth and carrier frequency that at least instruction is communicated by letter for D2D.Alternatively, according to some embodiment, this resource allocation information can also be indicated the execution cycle of D2D communication and be carried out at least one in number of times.
In the time that first user equipment is the initiator of D2D request, the described Gains resources assignment information in step S501 place can comprise: send the request for D2D communication to base station; And receive base station in response from base station in request and definite resource allocation information.Alternatively, in the time that D2D request is initiated by the second subscriber equipment, first user equipment can directly receive from base station the resource allocation information for D2D communication; Or, alternatively receive this resource allocation information from the second subscriber equipment.
Especially, according to some embodiment of the present invention, the D2D communication request sending to base station can comprise the anticipatory data transmission quantity of D2D communication.Now, resource allocation information can be determined by base station based on volume of transmitted data.
Next, method 500 proceeds to step S502, utilizes the indicated resource of resource allocation information at this, and the D2D carrying out between first user equipment and the second subscriber equipment communicates by letter.Especially, in certain embodiments, the dedicated channel bandwidth for D2D communication of being determined by base station is one of preset channel bandwidth of specifying of cellular communication system, and for example, preset channel bandwidth can be six preset channel bandwidth in FDD or the tdd mode of LTE system.Now, method 500 can also proceed to optional step S503, and the filter at this to the cellular communication for cellular communication system switches, for process the data that will receive and dispatch in D2D communication.For example, when send data on D2D link time, subscriber equipment can utilize the filter after switching to reduce less desirable transmitting; When receive data on D2D link time, can utilize the power leakage in the filter refusal adjacent channel after switching, etc.
Method 500 finishes after step S503.
Next with reference to figure 6, it shows according to an exemplary embodiment of the present invention the flow chart of the method 600 for supporting D2D communication.According to embodiments of the invention, method 600 can be carried out in base station side.With above describe similar, for set forth clear for the purpose of, two subscriber equipmenies that participate in D2D communication are called first user equipment and the second subscriber equipment.
After method 600 starts, at step S601, receive the request of communicating by letter for the D2D between first user equipment and the second subscriber equipment from first user equipment.Next,, at step S602, base station determines whether to allow this D2D communication (detail of this respect is describing in detail) above.Allow this D2D communication in response to determining, at step S603, send the resource allocation information for D2D communication to first user equipment, this resource allocation information is at least indicated dedicated channel bandwidth and the carrier frequency for D2D communication.
According to some embodiment of the present invention, above-mentioned request can comprise the anticipatory data transmission quantity of D2D communication, and wherein resource allocation information is determined based on volume of transmitted data.Alternatively or additionally, resource allocation information can also be indicated the execution cycle of D2D communication and be carried out at least one in number of times.
According to some embodiment of the present invention, can be one of preset channel bandwidth of specifying of cellular communication system for the dedicated channel bandwidth of D2D communication.For example, preset channel bandwidth can be the preset channel bandwidth of Long Term Evolution LTE FDD or tdd mode.
According to some optional embodiment of the present invention, method 600, resource allocation information can also be sent to from base station the second subscriber equipment.Note, this is optional, because resource allocation information for example also can be given the second subscriber equipment by first user device forwards.
Method 600 finishes after step S603.
With reference now to Fig. 7,, it shows the block diagram of the device 700 of communicating by letter according to the D2D between first user equipment and the second subscriber equipment of the embodiment of the present invention.Device 700 resides in user equipment side, and can be configured to carry out above-described method 500.
As shown in the figure, according to embodiments of the invention, device 700 comprises: acquiring unit 701, is configured to obtain the resource allocation information for D2D communication, resource allocation information is determined by the base station in cellular communication system and at least instruction is used for D2D communication dedicated channel bandwidth and carrier frequency.Device 700 also comprises D2D communication unit 702, is configured to utilize the indicated resource of resource allocation information to carry out D2D communication.
According to some embodiment, acquiring unit 701 can comprise: be configured to from the unit of the second subscriber equipment Gains resources assignment information.Alternatively or additionally, acquiring unit 701 can comprise: be configured to from the unit of base station receiving resource allocation information.Now, device 700 can also comprise request unit, is configured to send the request for D2D communication to base station, so that base station in response is determined in request and transmission resource allocation information.In such embodiments, this request can comprise the anticipatory data transmission quantity of D2D communication, and wherein resource allocation information can be determined by base station based on volume of transmitted data.
According to some embodiment, resource allocation information can also be indicated the execution cycle of D2D communication and be carried out at least one in number of times.In addition, according to some embodiment, can be one of preset channel bandwidth of specifying of cellular communication system for the dedicated channel bandwidth of D2D communication.For example, the preset channel bandwidth that this preset channel bandwidth can be Long Term Evolution LTE FDD or tdd mode.Now, device 700 can comprise optional filter switch unit 703, is configured to the filter of the cellular communication for cellular communication system to switch, for process the data that will transmit in D2D communication.
Next with reference to figure 8, it shows the block diagram of the device 800 of communicating by letter for the D2D between first user equipment and second subscriber equipment of supporting cellular communication system according to a kind of base station place in cellular communication system of the embodiment of the present invention.Device 800 resides in base station side, and can be configured to carry out above-described method 600.
As shown in Figure 8, according to embodiments of the invention, device 800 comprises: receiving element 801, is configured to receive the request for D2D communication from first user equipment; Check and approve unit 802, be configured in response to request, determine whether to allow the D2D between first user equipment and the second subscriber equipment to communicate by letter; And resource allocation unit 803, be configured to be allowed in response to D2D communication, send the resource allocation information for D2D communication to first user equipment, resource allocation information is at least indicated dedicated channel bandwidth and the carrier frequency for D2D communication.
According to some embodiment of the present invention, request can comprise the anticipatory data transmission quantity of D2D communication, and wherein resource allocation unit can be configured to based on volume of transmitted data and definite resource allocation information.According to some embodiment of the present invention, resource allocation information can also be indicated the execution cycle of D2D communication and be carried out at least one in number of times.According to some embodiment of the present invention, can be one of preset channel bandwidth of specifying of cellular communication system for the dedicated channel bandwidth of D2D communication.For example, preset channel bandwidth can be the preset channel bandwidth of Long Term Evolution LTE FDD or tdd mode.According to some embodiment of the present invention, device 800 can also comprise: the unit that is configured to send to the second subscriber equipment resource allocation information.
Should be appreciated that for clarity, some selectable unit and the subelement of device 700 and 800 is not shown in Fig. 7 and Fig. 8.But, should be appreciated that above and be equally applicable to device 700 and 800 with reference to described each feature of figure 1-Fig. 6.And terminology used here " unit " can be both hardware module, it can be also software unit module.Correspondingly, device 700 can be realized by variety of way.For example, in certain embodiments, device can some or all ofly utilize software and/or firmware to realize, for example, be implemented as the computer program being included on computer-readable medium.Alternatively or additionally, device can some or all ofly be realized based on hardware, for example, be implemented as integrated circuit (IC), application-specific integrated circuit (ASIC) (ASIC), SOC (system on a chip) (SOC), field programmable gate array (FPGA) etc.Scope of the present invention is unrestricted in this regard.
In addition, embodiments of the invention can comprise the entity device that comprises said apparatus.For example, the present invention can be implemented as the subscriber equipment that comprises above-described device 700, includes but not limited to cell phone, mobile phone, personal digital assistant (PDA), has flat computer or any suitable fixing and/or mobile device of communication capacity.And the present invention also can be implemented as the base station that comprises above-described device 800.
Only for purpose of explanation, some exemplary embodiments of the present invention have been described above.Embodiments of the invention can be realized by the combination of hardware, software or software and hardware.Hardware components can utilize special logic to realize; Software section can be stored in memory, and by suitable instruction execution system, for example microprocessor or special designs hardware are carried out.Those having ordinary skill in the art will appreciate that above-mentioned system and method can and/or be included in processor control routine with computer executable instructions realizes, for example, at the mounting medium such as disk, CD or DVD-ROM, provide such code on such as the programmable memory of read-only memory (firmware) or the data medium such as optics or electronic signal carrier.System of the present invention can be by such as very lagre scale integrated circuit (VLSIC) or gate array, realize such as the semiconductor of logic chip, transistor etc. or such as the hardware circuit of the programmable hardware device of field programmable gate array, programmable logic device etc., also can use the software of being carried out by various types of processors to realize, also can be realized by for example firmware of the combination of above-mentioned hardware circuit and software.
Although it should be noted that some devices or the sub-device of having mentioned system in above-detailed, this division is only not enforceable.In fact,, according to embodiments of the invention, the feature of above-described two or more devices and function can be specialized in a device.Otherwise, the feature of an above-described device and function can Further Division for to be specialized by multiple devices.Similarly, although described in the accompanying drawings the operation of the inventive method with particular order, this not requires or hint must be carried out these operations according to this particular order, or the operation shown in must carrying out all could realize the result of expecting.On the contrary, the step of describing in flow chart can change execution sequence.Additionally or alternatively, can omit some step, multiple steps be merged into a step and carry out, and/or a step is decomposed into multiple steps carries out.
Although described the present invention with reference to some specific embodiments, should be appreciated that, the present invention is not limited to disclosed specific embodiment.The present invention is intended to contain interior included various amendments and the equivalent arrangements of spirit and scope of claims.The scope of claims meets the most wide in range explanation, thereby comprises all such amendments and equivalent structure and function.
Claims (32)
1. the first user equipment place in cellular communication system is for carrying out a method of equipment D2D being communicated by letter with the equipment of the second subscriber equipment of described cellular communication system, and described method comprises:
Obtain the resource allocation information for described D2D communication, described resource allocation information is determined by the base station in described cellular communication system and at least instruction is used for described D2D communication dedicated channel bandwidth and carrier frequency; And
Utilize the indicated resource of described resource allocation information to carry out described D2D communication.
2. method according to claim 1, wherein obtains for the resource allocation information of described D2D communication and comprises: obtain described resource allocation information from described the second subscriber equipment.
3. method according to claim 1, wherein obtains for the resource allocation information of described D2D communication and comprises: receive described resource allocation information from described base station.
4. method according to claim 3, also comprises:
Send the request for described D2D communication to described base station, so that described base station in response is determined in described request and sent described resource allocation information.
5. method according to claim 4, wherein said request comprises the anticipatory data transmission quantity of described D2D communication, and wherein said resource allocation information is determined by described base station based on described volume of transmitted data.
6. method according to claim 1, wherein said resource allocation information is also indicated the execution cycle of described D2D communication and is carried out at least one in number of times.
7. method according to claim 1 is wherein one of preset channel bandwidth of specifying of described cellular communication system for the described dedicated channel bandwidth of described D2D communication.
8. method according to claim 7, wherein said preset channel bandwidth is the preset channel bandwidth of Long Term Evolution LTE FDD pattern or TDD pattern.
9. according to the method described in claim 7 or 8, also comprise:
Filter to the cellular communication for described cellular communication system switches, for process the data that will transmit in described D2D communication.
10. the method that the base station place in cellular communication system communicates by letter to equipment D2D for the equipment of supporting between first user equipment and second subscriber equipment of described cellular communication system, described method comprises:
Receive the request for described D2D communication from described first user equipment;
In response to described request, determine whether to allow the described D2D between described first user equipment and described the second subscriber equipment to communicate by letter; And
Be allowed in response to described D2D communication, send the resource allocation information for described D2D communication to described first user equipment, described resource allocation information is at least indicated dedicated channel bandwidth and the carrier frequency for described D2D communication.
11. methods according to claim 10, wherein said request comprises the anticipatory data transmission quantity of described D2D communication, and wherein said resource allocation information is determined based on described volume of transmitted data.
12. methods according to claim 10, wherein said resource allocation information is also indicated the execution cycle of described D2D communication and is carried out at least one in number of times.
13. methods according to claim 10 are wherein one of preset channel bandwidth of specifying of described cellular communication system for the described dedicated channel bandwidth of described D2D communication.
14. methods according to claim 13, wherein said preset channel bandwidth is the preset channel bandwidth of Long Term Evolution LTE FDD pattern or TDD pattern.
15. according to the method described in right 10, also comprises:
Send described resource allocation information to described the second subscriber equipment.
16. 1 kinds of first user equipment places in cellular communication system are for carrying out the device of equipment D2D being communicated by letter with the equipment of the second subscriber equipment of described cellular communication system, and described device comprises:
Acquiring unit, is configured to obtain the resource allocation information for described D2D communication, described resource allocation information is determined by the base station in described cellular communication system and at least instruction is used for described D2D communication dedicated channel bandwidth and carrier frequency; And
D2D communication unit, is configured to utilize the indicated resource of described resource allocation information to carry out described D2D communication.
17. devices according to claim 16, wherein said acquiring unit comprises: the unit that is configured to obtain from described the second subscriber equipment described resource allocation information.
18. devices according to claim 16, wherein said acquiring unit comprises: the unit that is configured to receive from described base station described resource allocation information.
19. devices according to claim 18, also comprise:
Request unit, is configured to send the request for described D2D communication to described base station, so that described base station in response is determined in described request and sent described resource allocation information.
20. devices according to claim 19, wherein said request comprises the anticipatory data transmission quantity of described D2D communication, and wherein said resource allocation information is determined by described base station based on described volume of transmitted data.
21. devices according to claim 16, wherein said resource allocation information is also indicated the execution cycle of described D2D communication and is carried out at least one in number of times.
22. devices according to claim 16 are wherein one of preset channel bandwidth of specifying of described cellular communication system for the described dedicated channel bandwidth of described D2D communication.
23. devices according to claim 22, wherein said preset channel bandwidth is the preset channel bandwidth of Long Term Evolution LTE FDD pattern or TDD pattern.
24. according to the device described in claim 22 or 23, also comprises:
Filter switch unit, is configured to the filter of the cellular communication for described cellular communication system to switch, for process the data that will transmit in described D2D communication.
The device that 25. 1 kinds of base station places in cellular communication system communicate by letter to equipment D2D for the equipment of supporting between first user equipment and second subscriber equipment of described cellular communication system, described device comprises:
Receiving element, is configured to receive the request for described D2D communication from described first user equipment;
Check and approve unit, be configured in response to described request, determine whether to allow the described D2D between described first user equipment and described the second subscriber equipment to communicate by letter; And
Resource allocation unit, be configured to be allowed in response to described D2D communication, send the resource allocation information for described D2D communication to described first user equipment, described resource allocation information is at least indicated dedicated channel bandwidth and the carrier frequency for described D2D communication.
26. devices according to claim 25, wherein said request comprises the anticipatory data transmission quantity of described D2D communication, and wherein said resource allocation unit is configured to based on described volume of transmitted data and definite described resource allocation information.
27. devices according to claim 25, wherein said resource allocation information is also indicated the execution cycle of described D2D communication and is carried out at least one in number of times.
28. devices according to claim 25 are wherein one of preset channel bandwidth of specifying of described cellular communication system for the described dedicated channel bandwidth of described D2D communication.
29. devices according to claim 28, wherein said preset channel bandwidth is the preset channel bandwidth of Long Term Evolution LTE FDD pattern or TDD pattern.
30. according to the device described in right 25, also comprises:
Be configured to send to described the second subscriber equipment the unit of described resource allocation information.
31. 1 kinds of subscriber equipmenies, comprise according to the device described in claim 16 to 24 any one.
32. 1 kinds of base stations, comprise according to the device described in claim 25 to 30 any one.
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