CN102547984A - Method and device for paging in device-to-device communication - Google Patents
Method and device for paging in device-to-device communication Download PDFInfo
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- CN102547984A CN102547984A CN2012100420390A CN201210042039A CN102547984A CN 102547984 A CN102547984 A CN 102547984A CN 2012100420390 A CN2012100420390 A CN 2012100420390A CN 201210042039 A CN201210042039 A CN 201210042039A CN 102547984 A CN102547984 A CN 102547984A
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Abstract
The invention discloses a method and a device for paging in device-to-device communication, relating to the technical field of communications and being capable of improving the paging efficiency and reducing error rate. In the embodiments of the invention, the method comprises the following steps of: discovering the paging destination UE (User Equipment) in the D2D (Device-to-Device) communication through a discovery subframe, and determining an equipment identifier of the paging destination UE; determining a paging time frequency resource corresponding to a paging subframe of the paging destination UE according to the equipment identifier of the paging destination UE and the current Cell of Origin frame timing; and transmitting a paging request message for D2D communication to the paging destination UE at the paging time frequency resource. The scheme provided by the embodiments of the invention is suitable for being used in the D2D communication.
Description
Technical field
The present invention relates to communication technical field, relate in particular to the method and the device of paging in a kind of device-to-device communication.
Background technology
At present, Cellular Networks is main cordless communication network, in this communication; If two terminal equipment distances are far away; Two terminal equipment communications need be transmitted through the base station, and promptly packet sends to the base station from a terminal equipment, and the base station is transmitted to another terminal equipment with this packet again; Two terminal equipment close together, in the other side's communication range, then packet directly transmits between communication terminal device each other, without the forwarding of base station, can save half the interface-free resources.
Direct communication can be called D2D (Device to Device, device-to-device) between two terminal equipments.Prior art adopts and is operated in the D2D paging under the synchronous mode; Can the paging time interval be divided into a series of son at interval; The terminal equipment of D2D need be confirmed the priority that current time receives or sends; According to the identifier or the timing information of priority and terminal equipment, select to send the perhaps time interval of paging receiving message then.If, carve the terminal equipment judgement of D2D at a time and might receive a beep-page message, the priority of paging receiving message is just than higher like this, and terminal equipment is just monitored beep-page message in this time interval so.
In addition, the paging time interval can be divided into the paging request time interval and paging acknowledging time interval two sections, and the paging time interval can comprise the chronon interval of any amount.The time interval of parameter amount at this moment, possibly can both listen to this beep-page message by a plurality of terminal equipments, yet have only a UE (User Equipment, subscriber equipment) paged when the terminal equipment of each D2D can be monitored according to identifier separately.Paged terminal equipment is confirmed at interval or is responded beep-page message at the paging acknowledging time.
Yet, when adopting prior art to carry out the D2D paging, UE miss paging and paged probability higher.
Summary of the invention
Embodiments of the invention provide the method and the device of paging in a kind of device-to-device communication, can improve paging efficiency, reduce error rate.
For achieving the above object, embodiments of the invention adopt following technical scheme:
The method of paging in a kind of device-to-device D2D communication comprises:
Find the device identification of the also definite said paging purpose UE of paging purpose UE in the D2D communication through finding subframe;
According to device identification and the timing of current cellular cell frame of said paging purpose UE, confirm the corresponding paging running time-frequency resource of paging subframe of said paging purpose UE;
Send the paging request message that is used for D2D communication to said paging purpose UE at said paging running time-frequency resource.
The method of paging in a kind of device-to-device D2D communication comprises:
Receive the paging request message that is used for D2D communication that the paging source UE in the D2D communication sends to said paging purpose UE at the corresponding paging running time-frequency resource of the paging subframe of paging purpose UE;
Resolve said paging request message, obtain the device identification of said paging source UE;
According to device identification and the timing of current cellular cell frame of said paging source UE, confirm the corresponding paging running time-frequency resource of paging subframe of said paging source UE;
Send page-response message at the corresponding paging running time-frequency resource of the paging subframe of said paging source UE to said paging source UE.
The device of paging in a kind of device-to-device D2D communication comprises:
First confirms the unit, is used for through paging purpose UE that finds subframe discovery D2D communication and the device identification of confirming said paging purpose UE;
Second confirms the unit, is used for device identification and the timing of current cellular cell frame according to said paging purpose UE, confirms the corresponding paging running time-frequency resource of paging subframe of said paging purpose UE;
Transmitting element is used for sending the paging request message that is used for D2D communication to said paging purpose UE at said paging running time-frequency resource.
The device of paging in a kind of device-to-device D2D communication comprises:
Receiving element, the paging source UE that is used for receiving D2D communication is in the paging request message that be used for D2D communication of the corresponding paging running time-frequency resource of the paging subframe of paging purpose UE to said paging purpose UE transmission;
Acquiring unit is used to resolve said paging request message, obtains the device identification of said paging source UE;
Confirm the unit, be used for device identification and the timing of current cellular cell frame, confirm the corresponding paging running time-frequency resource of paging subframe of said paging source UE according to said paging source UE;
Transmitting element is used for sending page-response message at the corresponding paging running time-frequency resource of the paging subframe of said paging source UE to said paging source UE.
The embodiment of the invention provides the method and the device of paging in a kind of device-to-device D2D communication, also confirms the device identification of said paging purpose UE through the paging purpose UE in the discovery subframe discovery D2D communication; According to device identification and the timing of current cellular cell frame of said paging purpose UE, confirm the corresponding paging running time-frequency resource of paging subframe of said paging purpose UE; The corresponding paging running time-frequency resource of said paging subframe at said paging purpose UE sends the paging request message that is used for D2D communication to said paging purpose UE.Compare with adopting prior art, the scheme that the embodiment of the invention provides can be carried out paging according to the paging running time-frequency resource of paging purpose UE, can improve paging efficiency, reduces error rate.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
The flow chart of the method for paging in a kind of D2D communication that Fig. 1 provides for the embodiment of the invention 1;
The flow chart of the method for paging in the another kind of D2D communication that Fig. 2 provides for the embodiment of the invention 1;
The block diagram of the device of paging in a kind of D2D communication that Fig. 3 provides for the embodiment of the invention 1;
The block diagram of the device of paging in the another kind of D2D communication that Fig. 4 provides for the embodiment of the invention 1;
The flow chart of the method for paging in a kind of D2D communication that Fig. 5 provides for the embodiment of the invention 2;
The structural representation of the system-frame that Fig. 6 provides for the embodiment of the invention 2;
The UE that Fig. 7 provides for the embodiment of the invention 2 is at the sketch map of the timing position of cellular cell;
The sketch map of the SN of definite paging purpose UE that Fig. 8 provides for the embodiment of the invention 2;
The sketch map of the FN of definite paging purpose UE that Fig. 9 provides for the embodiment of the invention 2;
The paging resource sketch map that Figure 10 provides for the embodiment of the invention 2;
The paging request of a D2D communication of the completion that Figure 11 provides for the embodiment of the invention 2 and the sketch map of page response process;
The block diagram of the device of paging in a kind of D2D communication that Figure 12 provides for the embodiment of the invention 2;
The block diagram of the device of paging in the another kind of D2D communication that Figure 13 provides for the embodiment of the invention 2.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The embodiment of the invention provides the method for paging in a kind of D2D communication, and the executive agent of this method is paging source UE, and is as shown in Figure 1, and this method comprises:
Terminal equipment around the discovery subframe is used to find, paging source UE finds other the neighbouring device and the relevant information of neighbouring device through finding subframe, for further D2D communication provides condition, wherein relevant information can be device identification.
Optional, said paging running time-frequency resource comprises the symbol number (SN) of paging subframe in the System Frame Number (SFN) of system-frame, the said system-frame and the frequency resource unit number (FN) in the said symbol;
Optional, according to device identification and the timing of current cellular cell frame of said paging purpose UE, confirm the SFN of said paging purpose UE;
According to the device identification of said paging purpose UE or according to the device identification of SFN and the said paging purpose UE of said paging purpose UE, confirm the SN of said paging purpose UE;
According to the device identification of SFN and the said paging purpose UE of said paging purpose UE, confirm the FN of said paging purpose UE.
Optional, said paging subframe comprises the paging request time slot and pages reply time slot; On the FN of said paging purpose UE in said paging request time slot, send paging request message to paging purpose UE.
Present embodiment also comprises, when the page response time slot of paging source UE in the paging subframe of said paging source UE, when receiving the page-response message of said paging purpose UE transmission, sets up communication link with said paging purpose UE.
The embodiment of the invention provides the method for paging in a kind of D2D communication, also confirms the device identification of said paging purpose UE through the paging purpose UE in the discovery subframe discovery D2D communication; According to device identification and the timing of current cellular cell frame of said paging purpose UE, confirm the corresponding paging running time-frequency resource of paging subframe of said paging purpose UE; Send paging request message at said paging running time-frequency resource to said paging purpose UE.When carrying out the D2D paging with the employing prior art; UE is in possible paging of each time interval or paged; Confirm UE transmission beep-page message or monitor beep-page message that through judging priority make that missing paging compares with paged probability is higher, the scheme that the embodiment of the invention provides can be carried out paging according to the paging running time-frequency resource of paging purpose UE; Can improve paging efficiency, reduce error rate.
The embodiment of the invention provides the method for paging in the another kind of D2D communication, and the executive agent of this method is paging purpose UE, and is as shown in Figure 2, and this method comprises:
Optional, resolve said paging request message, obtain the device identification of said paging source UE and the device identification of said paging purpose UE; The device identification of said paging source UE is used for the corresponding paging running time-frequency resource of paging subframe that said paging purpose UE confirms said paging source UE; The device identification of said paging purpose UE is used for said paging purpose UE and confirms whether said paging request message sends to said paging purpose UE.
Optional, said paging running time-frequency resource comprises the symbol number (SN) of paging subframe in the System Frame Number (SFN) of system-frame, the said system-frame and the frequency resource unit number (FN) in the said symbol;
Optional, according to device identification and the timing of current cellular cell frame of said paging source UE, confirm the SFN of said paging source UE;
According to the device identification of said paging source UE or according to the device identification of SFN and the said paging source UE of said paging purpose UE, confirm the SN of said paging source UE;
According to the device identification of SFN and the said paging source UE of said paging source UE, confirm the FN of said paging source UE.
Step 204 is sent page-response message at the corresponding paging running time-frequency resource of the paging subframe of said paging source UE to said paging source UE.
Optional, said paging subframe comprises the paging request time slot and pages reply time slot; On the FN of the said paging source UE of the said time slot that pages reply, send page-response message to paging source UE.
The embodiment of the invention provides the method for paging in a kind of D2D communication; The paging request message that is used for D2D communication of sending to said paging purpose UE at the corresponding paging running time-frequency resource of the paging subframe of paging purpose UE through the paging source UE that receives in the D2D communication; Resolve said paging request message, obtain the device identification of said paging source UE; According to device identification and the timing of current cellular cell frame of said paging source UE, confirm the corresponding paging running time-frequency resource of paging subframe of said paging source UE; Send page-response message at the corresponding paging running time-frequency resource of the paging subframe of said paging source UE to said paging source UE.When carrying out the D2D paging with the employing prior art; UE is in possible paging of each time interval or paged; Confirm UE transmission beep-page message or monitor beep-page message that through judging priority make that missing paging compares with paged probability is higher, the scheme that the embodiment of the invention provides can be carried out page response according to the paging running time-frequency resource of paging source UE; Can improve paging efficiency, reduce error rate.
The embodiment of the invention provides the device of paging in a kind of D2D communication, and this device can be for paging source UE, and as shown in Figure 3, this device comprises: first confirms 301, the second definite unit 302, unit, transmitting element 303.
First confirms unit 301, is used for through paging purpose UE that finds subframe discovery D2D communication and the device identification of confirming said paging purpose UE;
Second confirms unit 302, is used for device identification and the timing of current cellular cell frame according to said paging purpose UE, confirms the corresponding paging running time-frequency resource of paging subframe of said paging purpose UE;
Transmitting element 303 is used for sending the paging request message that is used for D2D communication to said paging purpose UE at said paging running time-frequency resource.
The embodiment of the invention provides the device of paging in a kind of D2D communication, also confirms the device identification of said paging purpose UE through the paging purpose UE in the discovery subframe discovery D2D communication through first definite unit; Second confirms device identification and the current cellular cell frame timing of unit according to said paging purpose UE, confirms the corresponding paging running time-frequency resource of paging subframe of said paging purpose UE; Transmitting element sends paging request message at said paging running time-frequency resource to said paging purpose UE.When carrying out the D2D paging with the employing prior art; UE is in possible paging of each time interval or paged; Confirm UE transmission beep-page message or monitor beep-page message that through judging priority make that missing paging compares with paged probability is higher, the scheme that the embodiment of the invention provides can be carried out paging according to the paging running time-frequency resource of paging purpose UE; Can improve paging efficiency, reduce error rate.
The embodiment of the invention provides the device of paging in the another kind of D2D communication, and this device can be for paging purpose UE, and as shown in Figure 4, this device comprises: receiving element 401, acquiring unit 402 is confirmed unit 403, transmitting element 404.
Receiving element 401, the paging source UE that is used for receiving D2D communication is in the paging request message that be used for D2D communication of the corresponding paging running time-frequency resource of the paging subframe of paging purpose UE to said paging purpose UE transmission;
Acquiring unit 402 is used to resolve said paging request message, obtains the device identification of said paging source UE;
Transmitting element 404 is used for sending page-response message at the corresponding paging running time-frequency resource of the paging subframe of said paging source UE to said paging source UE.
The embodiment of the invention provides the device of paging in a kind of D2D communication; Receive the paging request message that the paging source UE in the D2D communication sends through receiving element; Acquiring unit is resolved said paging request message then; And the device identification of obtaining said paging source UE, according to the device identification of said paging source UE and current cellular cell frame regularly, confirm that the unit confirms the corresponding paging running time-frequency resource of paging subframe of said paging source UE; Transmitting element sends page-response message to said paging source UE.When carrying out the D2D paging with the employing prior art; UE is in possible paging of each time interval or paged; Confirm UE transmission beep-page message or monitor beep-page message that through judging priority make that missing paging compares with paged probability is higher, the scheme that the embodiment of the invention provides can be carried out paging according to the paging running time-frequency resource of paging purpose UE; Can improve paging efficiency, reduce error rate.
The embodiment of the invention provides the method for paging in a kind of D2D communication, and as shown in Figure 5, this method comprises:
Step 501, paging source UE finds the paging purpose UE in the D2D communication through the discovery subframe and confirms the device identification of said paging purpose UE;
Need to prove that disturb and system compatible in order to control, the present invention program has adopted the timing architecture that is similar to the LTE Cellular Networks; System-frame as shown in Figure 6, that the embodiment of the invention provides, each system-frame comprise the subframe of preset number; For example, each system-frame is made up of 10 sub-frame, and each system-frame length is 10ms; Each subframe lengths is 1ms; Time slot by 2 0.5ms is formed, and each time slot is made up of 7 OFDM (Orthogonal Frequency Division Multiplexing, OFDM) symbol.Each subframe is divided into three kinds substantially according to purposes: find subframe, the paging subframe and the subframe of communicating by letter.
Terminal equipment around the discovery subframe is used to find, paging source UE finds other the neighbouring device and the relevant information of neighbouring device through finding subframe, for further D2D communication provides condition, wherein relevant information can be device identification.
Step 502, said paging source UE confirms the corresponding paging running time-frequency resource of paging subframe of said paging purpose UE according to device identification and the timing of current cellular cell frame of said paging purpose UE;
Direct paging during paging subframe main users D2D communication between paging source UE and the paging purpose UE.The paging subframe is mainly used in the device identification of bearing call purpose UE (being paging purpose UE); Also can be used for the device identification of bearing call source UE (being paging source UE), the device identification of bearing call source UE is used for paging purpose UE and confirms paging source UE, and sends page response information; Also can be used to carry the information such as communication frequency resource and power of communication subframe, so that paging source UE and paging purpose UE set up communication link, for the transfer of data that realizes next step provides safeguard.
As shown in Figure 6, the paging subframe be positioned at find after the subframe and the paging subframe with find that subframe is adjacent, can improve the efficient of communication like this; After paging source UE is finding paging purpose UE that subframe finds to want to communicate by letter; Just this paging purpose of paging immediately UE sets up communication link and begins communication, and carries out paging again after needn't waiting until the paging subframe again; Thereby can reduce time delay, improve communication quality; In addition, help the consideration of UE economize on electricity, avoid UE frequently to be waken up.
Further, find that subframe and paging subframe are not to have on each system-frame, but every at a distance from N said system-frame, a system-frame that comprises said discovery subframe and said paging subframe is arranged.N=1 ..., the value of N will be confirmed according to communicate by letter with the D2D loading condition of UE of honeycomb UE in the economize on electricity of UE and the sub-district.This parameter of N needs eNB to carry out all D2D communication UE of dynamic or semi-static configuration notification through the mode of broadcasting.Be the interference between avoiding cellular communication and D2D communicating by letter, cellular communication can further not dispatched in discovery subframe and paging subframe position in cell resource control centre (base station).
As shown in Figure 6, each said paging subframe comprises the paging request time slot and pages reply time slot.Wherein, paging source UE sent paging request message to paging purpose UE when the paging request time slot was used for D2D communication, and the time slot subscriber paging purpose that pages reply UE receives or respond paging request message.Each time slot comprises some OFDM symbols, and for example each time slot comprises 7 OFDM symbols, and each OFDM symbol is divided into M frequency resource unit at frequency domain, and each frequency resource unit comprises the experimental process carrier wave.Some frequency resources unit of several symbols is as the carrier of a D2D UE beep-page message; For example 6 of 1 symbol frequency resource unit are as the carrier of a D2D UE beep-page message; Wherein, 6 of 1 symbol frequency resource unit can be called paging unit.The UE of each D2D communication receives the beep-page message from the UE of other D2D communications in fixing paging unit.
Need to prove that the paging running time-frequency resource comprises the symbol SN of paging subframe in the system frame number SFN at paging resource place, the said System Frame Number and the frequency resource unit number FN in the said symbol in the said paging subframe.Here symbol is the OFDM symbol.
Said paging source UE confirms the corresponding paging running time-frequency resource of paging subframe of said paging purpose UE according to device identification and the timing of current cellular cell frame of said paging purpose UE, comprises following substep:
A, according to the device identification of said paging purpose UE and current cellular cell frame regularly confirms the SFN of said paging purpose U;
Optional, through formula (1) SFN=((n*K+UE_ID mod K) * T+SFN
0) mod1024 calculates the System Frame Number at paging resource place, wherein, n is a natural number; K is the packet count of D2D communication UE in the sub-district, and K can be through the dynamic or semi-static configuration of broadcast of eNB; In the cycle that T occurs for paging subframe place system-frame, unit is a system frame number; SFN
0Be the initial offset of the radio frames at paging subframe place, SFN
0Can be through the dynamic or semi-static configuration of broadcast of eNB; UE_ID is the device identification of each UE.
For example, work as K=3, T=2, SFN
0=0 o'clock, it was that 1 UE1 and device identification are that the System Frame Number at the paging resource place of 2 UE2 is that computing equipment is designated 0 UE0, device identification:
UE0, UE1 and the UE2 timing position in cellular cell is as shown in Figure 7; For example; The timing position of the paging subframe place system-frame of UE0 is system-frame #0, system-frame #6 ..., the timing position of the paging subframe place system-frame of UE1 is system-frame # 2, system-frame # 4 ...
B, according to the device identification of said paging purpose UE or according to the SFN of the corresponding paging running time-frequency resource of said paging purpose UE unit and the device identification of said paging purpose UE, confirm the SN of said paging purpose UE;
Confirm the System Frame Number at paging resource place as paging source UE after, can confirm the SN of the corresponding paging running time-frequency resource of paging purpose UE unit.Wherein, the SN that confirms the corresponding paging running time-frequency resource of paging purpose UE unit can adopt following dual mode:
Mode one:, confirm the SN of paging purpose UE according to the SFN of the corresponding paging running time-frequency resource of paging purpose UE unit and the device identification of paging purpose UE;
Through formula (2) SN=f
1(UE_ID SFN) confirms the SN of the corresponding paging running time-frequency resource of paging purpose UE unit; Wherein, UE_ID is the device identification of each UE; The System Frame Number that SFN belongs to for the UE paging resource of being calculated by formula (1); f
1() is the pseudo random sequence generating function on the GF (7), is used to generate 0 to 6 numeral, and be as shown in Figure 8, and the functional value that generates according to UE_ID and SFN is a SFN+1 number in the pseudo random sequence, wherein, and a
N-1, a
N-2, a
N-3, a
N-4... a
1, a
0For 7 systems of UE_ID are represented.For example, according to UE_ID and f
1The pseudo random sequence that () generates is 0,1,2,3,4,5,6 ... If, the SFN=5 at paging resource place, SN is the 6th number of pseudo random sequence so, is 5.
Mode two: the SN that confirms paging purpose UE according to the device identification of paging purpose UE;
Confirm the SN of paging purpose UE through formula (3) SN=UE_ID mod7; Wherein, UE_ID is the device identification of each UE.
C, according to the device identification of SFN and the said paging purpose UE of said paging purpose UE, confirm the FN of said paging purpose UE.
Through formula (4) FN=f
2(wherein, UE_ID is the device identification of each UE for UE_ID, SFN) the frequency resource unit number in the symbol in the calculating paging subframe; The System Frame Number that SFN belongs to for the UE paging resource of being calculated by formula (1); f
2() is the pseudo random sequence generating function on the GF (M), is used to generate the numeral of 0 to M-1 (M is the number of the frequency resource unit of each OFDM symbol), and as shown in Figure 9, functional value is a SFN+1 number in the pseudo random sequence, wherein, and b
N-1, b
N-2, b
N-3, b
N-4... b
1, b
0For the M system of UE_ID is represented.For example, according to UE_ID and f
2The pseudo random sequence that () generates is 0,1,2,3,4,5,6 ... If, the SFN=5 at paging resource place, FN is the 6th number of pseudo random sequence so, is 5.
Step 503, said paging source UE sends the paging request message that is used for D2D communication at the paging running time-frequency resource of said paging purpose UE to said paging purpose UE;
According to SFN, the SN of said paging purpose UE and the FN of said paging purpose UE of the said paging purpose UE that confirms, on the said FN of said paging request time slot, send paging request message to paging purpose UE.
Wherein, said paging request message comprises the device identification of paging source UE and the device identification of said paging purpose UE; The device identification of said paging source UE is used for the corresponding paging running time-frequency resource of paging subframe that said paging purpose UE confirms said paging source UE; The device identification of said paging purpose UE is used for said paging purpose UE and confirms whether said paging request message sends to said paging purpose UE.
Step 504, said paging purpose UE receives the paging request message that is used for D2D communication that the paging source UE in the D2D communication sends to said paging purpose UE at the corresponding paging running time-frequency resource of the paging subframe of paging purpose UE;
When the page response time slot of paging purpose UE, when receiving the page-response message that said paging purpose UE sends, set up communication link and at the enterprising row communication of said communication subframe in the paging subframe of said paging purpose UE.For example shown in Figure 10, optional, at frame number the paging request message of receiving paging source UE on FN the frequency resource unit of SN symbol of SFN, be to monitor page response on FN+1 the frequency resource unit of SN+1 symbol of SFN at frame number.
Step 5 05, said paging purpose UE resolves said paging request message, obtains the device identification of said paging source UE;
Optional, resolve said paging request message, obtain the device identification of said paging source UE and the device identification of said paging purpose UE; The device identification of said paging source UE is used for the corresponding paging running time-frequency resource of paging subframe that said paging purpose UE confirms said paging source UE; The device identification of said paging purpose UE is used for said paging purpose UE and confirms whether said paging request message sends to said paging purpose UE.
Step 506, said paging purpose UE confirms the corresponding paging running time-frequency resource of paging subframe of said paging source UE according to device identification and the timing of current cellular cell frame of said paging source UE;
Said paging purpose UE confirms that method and the source UE of paging described in the step 502 of the corresponding paging video resource of paging subframe of said paging source UE confirm that the method for the corresponding paging video resource of paging subframe of said paging purpose UE is identical; Do not give unnecessary details one by one at this; Different is, and what to confirm in the step 502 is the corresponding paging video resource of paging subframe of paging purpose UE, is the corresponding paging running time-frequency resource of paging subframe of paging source UE and this step is confirmed.
Step 507, said paging source UE sends page-response message at the corresponding paging running time-frequency resource of the paging subframe of said paging source UE to said paging source UE.
Optional; SFN, the SN of the corresponding paging running time-frequency resource of said paging source UE unit and the FN of the corresponding paging running time-frequency resource of said paging source UE unit according to the corresponding paging running time-frequency resource of the said paging source UE unit of confirming; On the said FN of the said time slot that pages reply, send page-response message to paging source UE.
The paging request of a D2D communication of completion shown in figure 11 and the sketch map of page response process, UE1 is paging purpose UE, and UE2 is paging source UE, and wherein, paging purpose UE also can be called paged UE.UE2 is that the paging request time slot of SFN1 sends paging request to UE1 at the System Frame Number of UE1; UE1 is that the paging request time slot of SFN1 receives the paging request that UE2 sends at System Frame Number; And at page response time slot monitoring page response; Wherein, SFN1 regularly confirms according to device identification and the current cellular cell frame of UE1.After UE1 receives paging request; Carry out analytical analysis; And confirm regularly that according to the device identification of UE2 and current cellular cell frame the System Frame Number of UE2 is SFN2; At System Frame Number is that the page response time slot of SFN2 sends page response to UE2, and UE2 is that the paging request time slot of SFN2 is monitored paging request at System Frame Number, and receives the page response of UE1 at the page response time slot.
The method of paging in a kind of D2D communication that the embodiment of the invention provides only on the paging resource of oneself, monitors beep-page message or send beep-page message through paging source UE and paging purpose UE, and beep-page message distinguishes on time domain and frequency domain; Thereby reduce conflict effectively; Improve paging efficiency, and UE only needs on the paging subframe of oneself, monitor beep-page message, other times can be in non operating state; For example resting state helps the economize on electricity of UE.
The embodiment of the invention provides the device of paging in a kind of D2D communication, and this device can be for paging source UE, and is shown in figure 12; This device comprises: first confirms 1201, the second definite unit 1202, unit, confirms SFN module 12021; Confirm SN module 12022; Confirm FN module 12023, transmitting element 1203, receiving element 1204.
First confirms unit 1201, is used for through paging purpose UE that finds subframe discovery D2D communication and the device identification of confirming said paging purpose UE;
Terminal equipment around the discovery subframe is used to find, paging source UE finds other the neighbouring device and the relevant information of neighbouring device through finding subframe, for further D2D communication provides condition, wherein relevant information can be device identification.Paging purpose UE also can be called paged UE.
Need to prove that each system-frame comprises the subframe of preset number, said subframe comprises finds subframe, the paging subframe and the subframe of communicating by letter.For example, each system-frame comprises 10 sub-frame.
According to device identification and the timing of current cellular cell frame of said paging purpose UE, second confirms unit 1202, is used for confirming the corresponding paging running time-frequency resource of paging subframe of said paging purpose UE;
Direct paging during paging subframe main users D2D communication between paging source UE and the paging purpose UE.The paging subframe be positioned at find after the subframe and the paging subframe with find that subframe is adjacent; Can improve the efficient of communication like this, after paging source UE is finding paging purpose UE that subframe finds to want to communicate by letter, this paging purpose of paging immediately UE just; Set up communication link and begin communication; And carry out paging again after needn't waiting until the paging subframe again, thus can reduce time delay, improve communication quality; In addition, help the consideration of UE economize on electricity, avoid UE frequently to be waken up.Find that subframe and paging subframe are not to have on each system-frame, but every at a distance from N said system-frame, a system-frame that comprises said discovery subframe and said paging subframe is arranged.N=1 ..., the value of N will be confirmed according to communicate by letter with the D2D loading condition of UE of honeycomb UE in the economize on electricity of UE and the sub-district.
Said paging running time-frequency resource comprises the symbol SN of paging subframe in the system frame number SFN of system-frame, the said system-frame and the frequency resource unit number FN in the said symbol.
Optional; Said second when confirming that the corresponding paging running time-frequency resource of the paging subframe of said paging purpose UE is confirmed in unit 1202; Said second confirms the definite SFN module 12021 in the unit 1202; Be used for device identification and the timing of current cellular cell frame, confirm the SFN of said paging purpose UE according to said paging purpose UE;
Said second confirms the definite SN module 12022 in the unit 1202, is used for confirming the SN of said paging purpose UE according to the device identification of said paging purpose UE or according to the device identification of SFN and the said paging purpose UE of said paging purpose UE;
Said second confirms the definite FN module 12023 in the unit 1202, is used for the device identification according to SFN and the said paging purpose UE of said paging purpose UE, confirms the FN of said paging purpose UE.
According to the corresponding paging video resource of paging subframe of the paging purpose UE that confirms, transmitting element 1203 is used for sending the beep-page message that is used for D2D communication to said paging purpose UE at the corresponding paging running time-frequency resource of said paging subframe of said paging purpose UE.
Said paging subframe comprises the paging request time slot and pages reply time slot.Said transmitting element 1203 specifically is used for: at the said FN of the said paging purpose UE of said paging request time slot, send paging request message to paging purpose UE.
Said paging request message comprises the device identification of paging source UE and the device identification of said paging purpose UE; Wherein, the device identification of said paging source UE is used for the corresponding paging running time-frequency resource of paging subframe that said paging purpose UE confirms said paging source UE; The device identification of said paging purpose UE is used for said paging purpose UE and confirms whether said paging request message sends to said paging purpose UE.
Receiving element 1204 is at the page response time slot of the paging subframe of said paging source UE, when receiving the page-response message that said paging purpose UE sends, sets up communication link with said paging purpose UE and at the enterprising row communication of the said subframe of communicating by letter.
The embodiment of the invention provides the device of paging in a kind of D2D communication, also confirms the device identification of said paging purpose UE through the paging purpose UE in the discovery subframe discovery D2D communication through first definite unit; Second confirms device identification and the current cellular cell frame timing of unit according to said paging purpose UE, confirms the corresponding paging running time-frequency resource of paging subframe of said paging purpose UE; Transmitting element sends the paging request message that is used for D2D communication at said paging running time-frequency resource to said paging purpose UE.The scheme that the embodiment of the invention provides can be carried out paging according to the paging running time-frequency resource of paging purpose UE, can improve paging efficiency, reduces error rate.
The embodiment of the invention provides the device of paging in the another kind of D2D communication, and this device can be for paging purpose UE, and is shown in figure 13; This device comprises: receiving element 1301, and acquiring unit 1302 is confirmed unit 1303; Confirm SFN module 13031; Confirm SN module 13032, confirm FN module 13033, transmitting element 1304.
Receiving element 1301, the paging source UE that is used for receiving D2D communication is in the paging request message that be used for D2D communication of the corresponding paging running time-frequency resource of the paging subframe of paging purpose UE to said paging purpose UE transmission;
Said paging request message comprises the device identification of said paging source UE and the device identification of said paging purpose UE.
Acquiring unit 1302 is used to resolve said paging request message, obtains the device identification of said paging source UE;
Said acquiring unit 1302 specifically is used for: resolve said paging request message, obtain the device identification of said paging source UE and the device identification of said paging purpose UE; The device identification of said paging source UE is used for the corresponding paging running time-frequency resource of paging subframe that said paging purpose UE confirms said paging source UE; The device identification of said paging purpose UE is used for said paging purpose UE and confirms whether said paging request message sends to said paging purpose UE.
Said acquiring unit 1302 obtains after the device identification of said paging source UE, confirms unit 1303, is used for device identification and the timing of current cellular cell frame according to said paging source UE, confirms the corresponding paging running time-frequency resource of paging subframe of said paging source UE;
Said paging running time-frequency resource comprises the symbol SN of paging subframe in the system frame number SFN of system-frame, the said system-frame and the frequency resource unit number FN in the said symbol.
Optional; When the corresponding paging running time-frequency resource of the paging subframe of said paging source UE is confirmed in said definite unit 1303; Definite SFN module 13031 in said definite unit 1303; Be used for device identification and the timing of current cellular cell frame, confirm the SFN of said paging source UE according to said paging source UE;
Definite SN module 13032 in said definite unit 1303 is used for confirming the SN of said paging source UE according to the device identification of said paging source UE or according to the device identification of SFN and the said paging source UE of said paging purpose UE;
Definite FN module 13033 in said definite unit 1303 is used for the device identification according to SFN and the said paging source UE of said paging source UE, confirms the FN of said paging source UE.
Said definite unit 1303 confirms after the corresponding paging running time-frequency resource of paging subframe of said paging source UE that transmitting element 1304 is used for sending page-response message at the corresponding paging running time-frequency resource of the paging subframe of said paging source UE to said paging source UE.
Each said paging subframe comprises the paging request time slot and pages reply time slot.Said transmitting element 1304 specifically is used for SFN, the SN of said paging source UE and the FN of said paging source UE according to the said paging source UE that confirms, on the FN of the said paging source UE of the said time slot that pages reply, sends page-response message to paging source UE.
The embodiment of the invention provides the device of paging in a kind of D2D communication; Receive the paging request message that is used for D2D communication that the paging source UE in the D2D communication sends through receiving element; Acquiring unit is resolved said paging request message then; And the device identification of obtaining said paging source UE, according to the device identification of said paging source UE and current cellular cell frame regularly, confirm that the unit confirms the corresponding paging running time-frequency resource of paging subframe of said paging source UE; Transmitting element sends page-response message to said paging source UE.The scheme that the embodiment of the invention provides can be carried out paging according to the paging running time-frequency resource of paging purpose UE, can improve paging efficiency, reduces error rate.
Need to prove that paging source UE in the embodiment of the invention and paging purpose UE can be UE arbitrarily.
The above; Be merely embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; Can expect easily changing or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by said protection range with claim.
Claims (24)
1. the method for paging is characterized in that during a device-to-device D2D communicated by letter, and comprising:
Find the device identification of the also definite said paging purpose UE of paging purpose UE in the D2D communication through finding subframe;
According to device identification and the timing of current cellular cell frame of said paging purpose UE, confirm the corresponding paging running time-frequency resource of paging subframe of said paging purpose UE;
Send the paging request message that is used for D2D communication to said paging purpose UE at said paging running time-frequency resource.
2. method according to claim 1 is characterized in that, said paging running time-frequency resource comprises the symbol SN of paging subframe in the system frame number SFN of system-frame, the said system-frame and the frequency resource unit number FN in the said symbol.
3. method according to claim 2 is characterized in that, said device identification and the timing of current cellular cell frame according to said paging purpose UE confirm that the corresponding paging running time-frequency resource of paging subframe of said paging purpose UE comprises:
According to device identification and the timing of current cellular cell frame of said paging purpose UE, confirm the SFN of said paging purpose UE;
According to the device identification of said paging purpose UE or according to the device identification of SFN and the said paging purpose UE of said paging purpose UE, confirm the SN of said paging purpose UE;
According to the device identification of SFN and the said paging purpose UE of said paging purpose UE, confirm the FN of said paging purpose UE.
4. method according to claim 2 is characterized in that, the paging subframe of said paging purpose UE comprises the paging request time slot and pages reply time slot;
Saidly send the paging request message that is used for D2D communication at said paging running time-frequency resource to said paging purpose UE and comprise:
On the FN of said paging purpose UE in said paging request time slot, send said paging request message to said paging purpose UE.
5. according to each described method of claim 1-4, every at a distance from N said system-frame, a system-frame that comprises said discovery subframe and said paging subframe is arranged;
Said paging subframe be positioned at after the said discovery subframe and said paging subframe adjacent with said discovery subframe.
6. method according to claim 1 is characterized in that, said paging request message comprises the device identification of paging source UE and the device identification of said paging purpose UE;
The device identification of said paging source UE is used for the corresponding paging running time-frequency resource of paging subframe that said paging purpose UE confirms said paging source UE;
The device identification of said paging purpose UE is used for said paging purpose UE and confirms whether said paging request message sends to said paging purpose UE.
7. method according to claim 6 is characterized in that,, after said paging purpose UE sends the paging request message that is used for D2D communication, also comprises at said paging running time-frequency resource:
Said paging source UE when receiving the page-response message of said paging purpose UE transmission, sets up communication link with said paging purpose UE at the page response time slot of the paging subframe of said paging source UE.
8. the method for paging is characterized in that during a device-to-device D2D communicated by letter, and comprising:
Receive the paging request message that is used for D2D communication that the paging source UE in the D2D communication sends to said paging purpose UE at the corresponding paging running time-frequency resource of the paging subframe of paging purpose UE;
Resolve said paging request message, obtain the device identification of said paging source UE;
According to device identification and the timing of current cellular cell frame of said paging source UE, confirm the corresponding paging running time-frequency resource of paging subframe of said paging source UE;
Send page-response message at the corresponding paging running time-frequency resource of the paging subframe of said paging source UE to said paging source UE.
9. method according to claim 8 is characterized in that, the said paging request message of said parsing, and the device identification of obtaining said paging source UE comprises:
Resolve said paging request message, obtain the device identification of said paging source UE and the device identification of said paging purpose UE; The device identification of said paging source UE is used for the corresponding paging running time-frequency resource of paging subframe that said paging purpose UE confirms said paging source UE; The device identification of said paging purpose UE is used for said paging purpose UE and confirms whether said paging request message sends to said paging purpose UE.
10. method according to claim 8; It is characterized in that the corresponding paging running time-frequency resource of the paging subframe of said paging source UE comprises the symbol SN of paging subframe in the system frame number SFN of system-frame, the said system-frame and the frequency resource unit number FN in the said symbol.
11. method according to claim 10 is characterized in that, said device identification and the timing of current cellular cell frame according to said paging source UE confirm that the corresponding paging running time-frequency resource of paging subframe of said paging source UE comprises:
According to device identification and the timing of current cellular cell frame of said paging source UE, confirm the SFN of said paging source UE;
According to the device identification of said paging source UE or according to the device identification of SFN and the said paging source UE of said paging purpose UE, confirm the SN of said paging source UE;
According to the device identification of SFN and the said paging source UE of said paging source UE, confirm the FN of said paging source UE.
12. method according to claim 10 is characterized in that, the paging subframe of said paging source UE comprises the paging request time slot and pages reply time slot;
The corresponding paging running time-frequency resource of said paging subframe at said paging source UE sends page-response message to said paging source UE and comprises:
On the FN of the said paging source UE of the said time slot that pages reply, send page-response message to paging source UE.
13. the device of paging is characterized in that during a device-to-device D2D communicated by letter, and comprising:
First confirms the unit, is used for through paging purpose UE that finds subframe discovery D2D communication and the device identification of confirming said paging purpose UE;
Second confirms the unit, is used for device identification and the timing of current cellular cell frame according to said paging purpose UE, confirms the corresponding paging running time-frequency resource of paging subframe of said paging purpose UE;
Transmitting element is used for sending the paging request message that is used for D2D communication to said paging purpose UE at said paging running time-frequency resource.
14. device according to claim 13 is characterized in that, said paging running time-frequency resource comprises the symbol SN of paging subframe in the system frame number SFN of system-frame, the said system-frame and the frequency resource unit number FN in the said symbol.
15. device according to claim 14 is characterized in that, said second confirms that the unit comprises:
Confirm the SFN module, be used for device identification and the timing of current cellular cell frame, confirm the SFN of said paging purpose UE according to said paging purpose UE;
Confirm the SN module, be used for confirming the SN of said paging purpose UE according to the device identification of said paging purpose UE or according to the device identification of SFN and the said paging purpose UE of said paging purpose UE;
Confirm the FN module, be used for device identification, confirm the FN of said paging purpose UE according to SFN and the said paging purpose UE of said paging purpose UE.
16. device according to claim 14 is characterized in that, the paging subframe of said paging purpose UE comprises the paging request time slot and pages reply time slot;
Said transmitting element specifically is used for:
On the FN of said paging purpose UE in said paging request time slot, send said paging request message to said paging purpose UE.
17. according to each described device of claim 13-16, it is characterized in that, every at a distance from N said system-frame, a system-frame that comprises said discovery subframe and said paging subframe is arranged;
Said paging subframe be positioned at after the said discovery subframe and said paging subframe adjacent with said discovery subframe.
18. device according to claim 13 is characterized in that, said paging request message comprises the device identification of paging source UE and the device identification of said paging purpose UE;
The device identification of said paging source UE is used for the corresponding paging running time-frequency resource of paging subframe that said paging purpose UE confirms said paging source UE;
The device identification of said paging purpose UE is used for said paging purpose UE and confirms whether said paging request message sends to said paging purpose UE.
19. device according to claim 18 is characterized in that, said device also comprises:
Receiving element is used for the page response time slot in the paging subframe of said paging source UE, when receiving the page-response message of said paging purpose UE transmission, sets up communication link with said paging purpose UE.
20. the device of paging is characterized in that during a device-to-device D2D communicated by letter, and comprising:
Receiving element, the paging source UE that is used for receiving D2D communication is in the paging request message that be used for D2D communication of the corresponding paging running time-frequency resource of the paging subframe of paging purpose UE to said paging purpose UE transmission;
Acquiring unit is used to resolve said paging request message, obtains the device identification of said paging source UE;
Confirm the unit, be used for device identification and the timing of current cellular cell frame, confirm the corresponding paging running time-frequency resource of paging subframe of said paging source UE according to said paging source UE;
Transmitting element is used for sending page-response message at the corresponding paging running time-frequency resource of the paging subframe of said paging source UE to said paging source UE.
21. device according to claim 20 is characterized in that, said acquiring unit specifically is used for:
Resolve said paging request message, obtain the device identification of said paging source UE and the device identification of said paging purpose UE; The device identification of said paging source UE is used for the corresponding paging running time-frequency resource of paging subframe that said paging purpose UE confirms said paging source UE; The device identification of said paging purpose UE is used for said paging purpose UE and confirms whether said paging request message sends to said paging purpose UE.
22. device according to claim 20; It is characterized in that the corresponding paging running time-frequency resource of the paging subframe of said paging source UE comprises the symbol SN of paging subframe in the system frame number SFN of system-frame, the said system-frame and the frequency resource unit number FN in the said symbol.
23. device according to claim 22 is characterized in that, said definite unit comprises:
Confirm the SFN module, be used for device identification and the timing of current cellular cell frame, confirm the SFN of said paging source UE according to said paging source UE;
Confirm the SN module, be used for confirming the SN of said paging source UE according to the device identification of said paging source UE or according to the device identification of SFN and the said paging source UE of said paging purpose UE;
Confirm the FN module, be used for device identification, confirm the FN of said paging source UE according to SFN and the said paging source UE of said paging source UE.
24. device according to claim 22 is characterized in that, the paging subframe of said paging source UE comprises the paging request time slot and pages reply time slot;
Said transmitting element specifically is used for:
On the FN of the said paging source UE of the said time slot that pages reply, send page-response message to paging source UE.
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