CN102547984B - Method and device for paging in device-to-device communication - Google Patents

Method and device for paging in device-to-device communication Download PDF

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Publication number
CN102547984B
CN102547984B CN201210042039.0A CN201210042039A CN102547984B CN 102547984 B CN102547984 B CN 102547984B CN 201210042039 A CN201210042039 A CN 201210042039A CN 102547984 B CN102547984 B CN 102547984B
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paging
described
ue
described paging
subframe
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CN201210042039.0A
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CN102547984A (en
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周晗
冯淑兰
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华为技术有限公司
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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

The method of paging in a kind of device-to-device communication and device

Technical field

The present invention relates to communication technical field, particularly relate to method and the device of paging in the communication of a kind of device-to-device.

Background technology

At present, Cellular Networks is main cordless communication network, in this communication, if two terminal equipments are distant, two terminal equipment in communication need to forward through base station, and namely packet is sent to base station from a terminal equipment, and this packet is transmitted to another terminal equipment by base station again; Two terminal equipment close together, mutually in the communication range of the other side, then packet directly transmits between communication terminal device, without the forwarding of base station, can save the interface-free resources of half.

Between two terminal equipments, direct communication can be called D2D (Device to Device, device-to-device).Prior art employing work D2D paging in synchronous mode, the paging time interval can be divided into a series of sub-interval, the terminal equipment of D2D need determine the priority that current time receives or sends, then according to identifier or the timing information of priority and terminal equipment, select to send or time interval of paging receiving message.If judge likely to receive a beep-page message at the terminal equipment of certain moment D2D, the priority of such paging receiving message is just higher, and so terminal equipment just monitors beep-page message in this time interval.

In addition, the paging time interval can be divided into the paging request time interval and two, paging acknowledging time interval section, and the paging time interval can comprise the chronon interval of any amount.The time interval of parameter amount when the terminal equipment of each D2D can be monitored according to respective identifier, now, may can listen to this beep-page message by multiple terminal equipment, but only have a UE (User Equipment, subscriber equipment) paged.Paged terminal equipment confirms at paging acknowledging time interval or response beep-page message.

But, adopt prior art when carrying out D2D paging, UE miss page and paged probability higher.

Summary of the invention

The method of paging during embodiments of the invention provide a kind of device-to-device to communicate and device, can improve paging efficiency, reduce error rate.

For achieving the above object, embodiments of the invention adopt following technical scheme:

A method for paging during device-to-device D2D communicates, comprising:

By finding that subframe finds paging object UE in D2D communication and determines the device identification of described paging object UE;

According to device identification and the timing of existing cellular community frame of described paging object UE, determine the corresponding paging running time-frequency resource of the paging subframe of described paging object UE;

Send the paging request message being used for D2D communication to described paging object UE at described paging running time-frequency resource.

A method for paging during device-to-device D2D communicates, comprising:

Receive the paging request message for D2D communication that the paging source UE in D2D communication sends to described paging object UE at the paging subframe corresponding paging running time-frequency resource of paging object UE;

Resolve described paging request message, obtain the device identification of described paging source UE;

According to device identification and the timing of existing cellular community frame of described paging source UE, determine the corresponding paging running time-frequency resource of paging subframe of described paging source UE;

Page-response message is sent to described paging source UE at the paging subframe corresponding paging running time-frequency resource of described paging source UE.

A device for paging during device-to-device D2D communicates, comprising:

First determining unit, for by finding that subframe finds paging object UE in D2D communication and determines the device identification of described paging object UE;

Second determining unit, for according to the device identification of described paging object UE and the timing of existing cellular community frame, determines the corresponding paging running time-frequency resource of the paging subframe of described paging object UE;

Transmitting element, for sending the paging request message being used for D2D communication to described paging object UE at described paging running time-frequency resource.

A device for paging during device-to-device D2D communicates, comprising:

Receiving element, for receiving the paging request message for D2D communication that the paging source UE in D2D communication sends to described paging object UE at the paging subframe corresponding paging running time-frequency resource of paging object UE;

Acquiring unit, for resolving described paging request message, obtains the device identification of described paging source UE;

Determining unit, for according to the device identification of described paging source UE and the timing of existing cellular community frame, determines the corresponding paging running time-frequency resource of paging subframe of described paging source UE;

Transmitting element, sends page-response message for the paging subframe corresponding paging running time-frequency resource at described paging source UE to described paging source UE.

The method of paging and device during the embodiment of the present invention provides a kind of device-to-device D2D to communicate, by finding that subframe finds paging object UE in D2D communication and determines the device identification of described paging object UE; According to device identification and the timing of existing cellular community frame of described paging object UE, determine the corresponding paging running time-frequency resource of the paging subframe of described paging object UE; The paging request message being used for D2D communication is sent to described paging object UE at the described paging subframe corresponding paging running time-frequency resource of described paging object UE.Compared with employing prior art, the scheme that the embodiment of the present invention provides can carry out paging according to the paging running time-frequency resource of paging object UE, can improve paging efficiency, reduces error rate.

Accompanying drawing explanation

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

The flow chart of the method for paging in a kind of D2D communication that Fig. 1 provides for the embodiment of the present 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 present 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 present 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 present 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 present invention 2;

The structural representation of the system-frame that Fig. 6 provides for the embodiment of the present invention 2;

The UE that Fig. 7 provides for the embodiment of the present invention 2 is at the schematic diagram of the timing position of cellular cell;

The schematic diagram of the SN of the determination paging object UE that Fig. 8 provides for the embodiment of the present invention 2;

The schematic diagram of the FN of the determination paging object UE that Fig. 9 provides for the embodiment of the present invention 2;

The paging resource schematic diagram that Figure 10 provides for the embodiment of the present invention 2;

What Figure 11 provided for the embodiment of the present invention 2 completes the paging request of a D2D communication and the schematic diagram 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 present 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 present invention 2.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

Embodiment 1

The method of paging during the embodiment of the present invention provides a kind of D2D to communicate, the executive agent of this method is paging source UE, and as shown in Figure 1, the method comprises:

Step 101, by finding that subframe finds paging object UE in D2D communication and determines the device identification of described paging object UE;

Find that subframe is for finding the terminal equipment of surrounding, paging source UE is by finding that subframe finds other neighbouring device and the relevant information of neighbouring device, and for further D2D communication provides condition, wherein relevant information can be device identification.

Step 102, according to device identification and the timing of existing cellular community frame of described paging object UE, determines the corresponding paging running time-frequency resource of the paging subframe of described paging object UE;

Optionally, described paging running time-frequency resource comprises the frequency resource unit number (FN) in the symbol number (SN) of paging subframe in the System Frame Number (SFN) of system-frame, described system-frame and described symbol;

Optionally, according to device identification and the timing of existing cellular community frame of described paging object UE, the SFN of described paging object UE is determined;

The device identification of the device identification according to described paging object UE or the SFN according to described paging object UE and described paging object UE, determines the SN of described paging object UE;

According to the SFN of described paging object UE and the device identification of described paging object UE, determine the FN of described paging object UE.

Step 103, sends the paging request message being used for D2D communication to described paging object UE at described paging running time-frequency resource.

Optionally, described paging subframe comprises paging request time slot and the time slot that pages reply; On the FN of the described paging object UE in described paging request time slot, send paging request message to paging object UE.

The present embodiment also comprises, and when paging source UE is at the page response time slot of the paging subframe of described paging source UE, when receiving the page-response message of described paging object UE transmission, sets up communication link with described paging object UE.

A kind of method of paging during the embodiment of the present invention provides D2D to communicate, by finding that subframe finds paging object UE in D2D communication and determines the device identification of described paging object UE; According to device identification and the timing of existing cellular community frame of described paging object UE, determine the corresponding paging running time-frequency resource of the paging subframe of described paging object UE; Paging request message is sent to described paging object UE at described paging running time-frequency resource.When carrying out D2D paging with employing prior art, UE is in the likely paging or paged of each time interval, by judging that priority determines that UE sends beep-page message or monitors beep-page message, miss page is compared with paged probability is higher, the scheme that the embodiment of the present invention provides can carry out paging according to the paging running time-frequency resource of paging object UE, can paging efficiency be improved, reduce error rate.

The method of paging during the embodiment of the present invention provides another kind of D2D to communicate, the executive agent of the method is paging object UE, and as shown in Figure 2, the method comprises:

Step 201, receives the paging request message for D2D communication that the paging source UE in D2D communication sends to described paging object UE at the paging subframe corresponding paging running time-frequency resource of paging object UE;

Step 202, resolves described paging request message, obtains the device identification of described paging source UE;

Optionally, resolve described paging request message, obtain the device identification of described paging source UE and the device identification of described paging object UE; The device identification of described paging source UE, determines the corresponding paging running time-frequency resource of paging subframe of described paging source UE for described paging object UE; For described paging object UE, the device identification of described paging object UE, determines whether described paging request message sends to described paging object UE.

Step 203, according to device identification and the timing of existing cellular community frame of described paging source UE, determines the corresponding paging running time-frequency resource of paging subframe of described paging source UE;

Optionally, described paging running time-frequency resource comprises the frequency resource unit number (FN) in the symbol number (SN) of paging subframe in the System Frame Number (SFN) of system-frame, described system-frame and described symbol;

Optionally, according to device identification and the timing of existing cellular community frame of described paging source UE, the SFN of described paging source UE is determined;

The device identification of the device identification according to described paging source UE or the SFN according to described paging object UE and described paging source UE, determines the SN of described paging source UE;

According to the SFN of described paging source UE and the device identification of described paging source UE, determine the FN of described paging source UE.

Step 204, sends page-response message at the paging subframe corresponding paging running time-frequency resource of described paging source UE to described paging source UE.

Optionally, described paging subframe comprises paging request time slot and the time slot that pages reply; On the FN of the described paging source UE of the described time slot that pages reply, send page-response message to paging source UE.

The method of paging during the embodiment of the present invention provides a kind of D2D to communicate, by receiving the paging request message for D2D communication that the paging source UE in D2D communication sends to described paging object UE at the paging subframe corresponding paging running time-frequency resource of paging object UE, resolve described paging request message, obtain the device identification of described paging source UE; According to device identification and the timing of existing cellular community frame of described paging source UE, determine the corresponding paging running time-frequency resource of paging subframe of described paging source UE; Page-response message is sent to described paging source UE at the paging subframe corresponding paging running time-frequency resource of described paging source UE.When carrying out D2D paging with employing prior art, UE is in the likely paging or paged of each time interval, by judging that priority determines that UE sends beep-page message or monitors beep-page message, miss page is compared with paged probability is higher, the scheme that the embodiment of the present invention provides can carry out page response according to the paging running time-frequency resource of paging source UE, can paging efficiency be improved, reduce error rate.

The device of paging during the embodiment of the present invention provides a kind of D2D to communicate, this device can be paging source UE, and as shown in Figure 3, this device comprises: the first determining unit 301, the second determining unit 302, transmitting element 303.

First determining unit 301, for by finding that subframe finds paging object UE in D2D communication and determines the device identification of described paging object UE;

Second determining unit 302, for according to the device identification of described paging object UE and the timing of existing cellular community frame, determines the corresponding paging running time-frequency resource of the paging subframe of described paging object UE;

Transmitting element 303, for sending the paging request message being used for D2D communication to described paging object UE at described paging running time-frequency resource.

The device of paging during the embodiment of the present invention provides a kind of D2D to communicate, passes through the paging object UE in discovery subframe discovery D2D communication by the first determining unit and determines the device identification of described paging object UE; Second determining unit, according to the device identification of described paging object UE and the timing of existing cellular community frame, determines the corresponding paging running time-frequency resource of the paging subframe of described paging object UE; Transmitting element sends paging request message at described paging running time-frequency resource to described paging object UE.When carrying out D2D paging with employing prior art, UE is in the likely paging or paged of each time interval, by judging that priority determines that UE sends beep-page message or monitors beep-page message, miss page is compared with paged probability is higher, the scheme that the embodiment of the present invention provides can carry out paging according to the paging running time-frequency resource of paging object UE, can paging efficiency be improved, reduce error rate.

The device of paging during the embodiment of the present invention provides another kind of D2D to communicate, this device can be paging object UE, and as shown in Figure 4, this device comprises: receiving element 401, acquiring unit 402, determining unit 403, transmitting element 404.

Receiving element 401, for receiving the paging request message for D2D communication that the paging source UE in D2D communication sends to described paging object UE at the paging subframe corresponding paging running time-frequency resource of paging object UE;

Acquiring unit 402, for resolving described paging request message, obtains the device identification of described paging source UE;

Determining unit 403, for according to the device identification of described paging source UE and the timing of existing cellular community frame, determines the corresponding paging running time-frequency resource of paging subframe of described paging source UE;

Transmitting element 404, sends page-response message for the paging subframe corresponding paging running time-frequency resource at described paging source UE to described paging source UE.

The device of paging during the embodiment of the present invention provides a kind of D2D to communicate, the paging request message of the paging source UE transmission in D2D communication is received by receiving element, then acquiring unit resolves described paging request message, and obtain the device identification of described paging source UE, according to device identification and the timing of existing cellular community frame of described paging source UE, determining unit determines the corresponding paging running time-frequency resource of paging subframe of described paging source UE; Transmitting element sends page-response message to described paging source UE.When carrying out D2D paging with employing prior art, UE is in the likely paging or paged of each time interval, by judging that priority determines that UE sends beep-page message or monitors beep-page message, miss page is compared with paged probability is higher, the scheme that the embodiment of the present invention provides can carry out paging according to the paging running time-frequency resource of paging object UE, can paging efficiency be improved, reduce error rate.

Embodiment 2

The method of paging during the embodiment of the present invention provides a kind of D2D to communicate, as shown in Figure 5, the method comprises:

Step 501, paging source UE passes through the paging object UE in discovery subframe discovery D2D communication and determines the device identification of described paging object UE;

It should be noted that, in order to control interference and system compatible, the present invention program have employed the timing architecture being similar to LTE Cellular Networks, as shown in Figure 6, the system-frame that the embodiment of the present invention provides, each system-frame comprises the subframe of predetermined number, such as, each system-frame is made up of 10 subframes, each system frame length is 10ms, and each subframe lengths is 1ms, is made up of the time slot of 2 0.5ms, 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, paging subframe and the subframe that communicates.

Find that subframe is for finding the terminal equipment of surrounding, paging source UE is by finding that subframe finds other neighbouring device and the relevant information of neighbouring device, and for further D2D communication provides condition, wherein relevant information can be device identification.

Step 502, described paging source UE, according to the device identification of described paging object UE and the timing of existing cellular community frame, determines the corresponding paging running time-frequency resource of the paging subframe of described paging object UE;

Direct paging when paging subframe main users D2D communicates between paging source UE and paging object UE.Paging subframe is mainly used in the device identification of bearing call object UE (i.e. paging object UE); Also may be used for the device identification of bearing call source UE (i.e. paging source UE), the device identification of bearing call source UE is used for paging object UE and confirms paging source UE, and sends page response information; Also may be used for carrying the information such as the communication communication frequency resource of subframe and power, so that paging source UE and paging object UE sets up communication link, for the transfer of data realizing next step provides safeguard.

As shown in Figure 6, paging subframe is positioned at and finds after subframe and paging subframe and find that subframe is adjacent, the efficiency of communication can be improved like this, when paging source UE is after finding that subframe finds the paging object UE wanting to communicate, just can this paging of paging immediately object UE, set up communication link and start communication, and after paging subframe need not be waited until again, carry out paging again, thus can time delay be reduced, improve communication quality; In addition, be conducive to the consideration of UE economize on electricity, avoid UE to be frequently waken up.

Further, find that subframe and paging subframe are not that each system-frame has, but every N number of described system-frame, have a system-frame comprising described discovery subframe and described paging subframe.N=1 ..., the value of N will be determined according to communicate with honeycomb UE with D2D in the community loading condition of UE of the economize on electricity of UE.This parameter of N needs eNB to carry out all D2D communication UE of dynamic or semi-static configuration notification by the mode of broadcast.For avoid cellular communication to communicate with D2D between interference, cell resource control centre (base station) further can not dispatch cellular communication in discovery subframe and paging subframe position.

As shown in Figure 6, each described paging subframe comprises paging request time slot and the time slot that pages reply.Wherein, paging request time slot is used for paging source UE when D2D communicates and sends paging request message to paging object UE, and the time slot user paging object UE that pages reply receives or response paging request message.Each time slot comprises some OFDM symbol, and such as each time slot comprises 7 OFDM symbol, and each OFDM symbol is divided into M frequency resource unit at frequency domain, and each frequency resource unit comprises several subcarriers.Some frequency resource unit of several symbols are as the carrier of a D2D UE beep-page message, 6 frequency resource unit of such as 1 symbol are as the carrier of a D2D UE beep-page message, wherein, 6 frequency resource unit of 1 symbol can be called paging unit.The UE of each D2D communication receives the beep-page message of the UE communicated from other D2D in fixing paging unit.

It should be noted that, paging running time-frequency resource comprises the frequency resource unit FN in the described symbol in the symbol SN of paging subframe in the system frame number SFN at paging resource place, described System Frame Number and described paging subframe.Here symbol is OFDM symbol.

Described paging source UE, according to the device identification of described paging object UE and the timing of existing cellular community frame, determines the corresponding paging running time-frequency resource of the paging subframe of described paging object UE, comprises following sub-step:

A, according to the device identification of described paging object UE and the timing of existing cellular community frame, determine the SFN of described paging object U;

Optionally, by 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 natural number; K is that in community, D2D communicates the packet count of UE, and K can by the dynamic or semi-static configuration of the broadcast of eNB; T is the cycle that paging subframe place system-frame occurs, unit is system frame number; SFN 0for the initial offset of the radio frames at paging subframe place, SFN 0the configuration that the broadcast of eNB is dynamic or semi-static can be passed through; UE_ID is the device identification of each UE.

Such as, work as K=3, T=2, SFN 0when=0, UE0, device identification that computing equipment is designated 0 be 1 UE1 and device identification to be the System Frame Number at the paging resource place of the UE2 of 2 be:

UE 0 : 0,6,12 · · · UE 1 : 2,8,14 · · · UE 2 : 4,10,16 · · ·

UE0, UE1 and UE2 timing position in cellular cell as shown in Figure 7, such as, 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 described paging object UE or according to the SFN of described paging object UE corresponding paging running time-frequency resource unit and the device identification of described paging object UE, determine the SN of described paging object UE;

After paging source UE determines the System Frame Number at paging resource place, the SN of paging object UE corresponding paging running time-frequency resource unit can be determined.Wherein, determine that the SN of paging object UE corresponding paging running time-frequency resource unit can adopt following two kinds of modes:

Mode one: according to the SFN of paging object UE corresponding paging running time-frequency resource unit and the device identification of paging object UE, determine the SN of paging object UE;

By formula (2) SN=f 1(UE_ID, SFN) determines the SN of paging object UE corresponding paging running time-frequency resource unit; Wherein, UE_ID is the device identification of each UE; SFN is the System Frame Number at the UE paging resource place of being calculated by formula (1); f 1() is the pseudo random sequence generating function on GF (7), for generating the numeral of 0 to 6, as shown in Figure 8, is SFN+1 number in pseudo random sequence according to the functional value that UE_ID and SFN generates, wherein, and a n-1, a n-2, a n-3, a n-4... a 1, a 0for 7 systems of UE_ID represent.Such as, 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, so SN is the 6th number of pseudo random sequence, is 5.

Mode two: according to the SN of the device identification determination paging object UE of paging object UE;

The SN of paging object UE is determined by formula (3) SN=UE_ID mod7; Wherein, UE_ID is the device identification of each UE.

C, according to the SFN of described paging object UE and the device identification of described paging object UE, determine the FN of described paging object UE.

By formula (4) FN=f 2(UE_ID, SFN) calculates the frequency resource unit number in the symbol in paging subframe, and wherein, UE_ID is the device identification of each UE; SFN is the System Frame Number at the UE paging resource place of being calculated by formula (1); f 2() is the pseudo random sequence generating function on GF (M), for generating the numeral of 0 to M-1 (M is the number of the frequency resource unit of each OFDM symbol), as shown in Figure 9, functional value is SFN+1 number in pseudo random sequence, wherein, b n-1, b n-2, b n-3, b n-4... b 1, b 0for the M system of UE_ID represents.Such as, 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, so FN is the 6th number of pseudo random sequence, is 5.

Step 503, described paging source UE sends at the paging running time-frequency resource of described paging object UE the paging request message being used for D2D communication to described paging object UE;

According to the FN of the SFN of the described paging object UE determined, the SN of described paging object UE and described paging object UE, on the described FN of described paging request time slot, send paging request message to paging object UE.

Wherein, described paging request message comprises the device identification of paging source UE and the device identification of described paging object UE; The device identification of described paging source UE, determines the corresponding paging running time-frequency resource of paging subframe of described paging source UE for described paging object UE; For described paging object UE, the device identification of described paging object UE, determines whether described paging request message sends to described paging object UE.

Step 504, described paging object UE receives the paging request message for D2D communication that the paging source UE in D2D communication sends to described paging object UE at the paging subframe corresponding paging running time-frequency resource of paging object UE;

When paging object UE is at the page response time slot of the paging subframe of described paging object UE, when receiving the page-response message that described paging object UE sends, set up communication link and at the enterprising Serial Communication of described communication subframe.Such as shown in Figure 10, optionally, at frame number be SN the symbol of SFN FN frequency resource unit on receive the paging request message of paging source UE, at frame number be SN+1 the symbol of SFN FN+1 frequency resource unit on monitor page response.

Step 5 05, described paging object UE resolves described paging request message, obtains the device identification of described paging source UE;

Optionally, resolve described paging request message, obtain the device identification of described paging source UE and the device identification of described paging object UE; The device identification of described paging source UE, determines the corresponding paging running time-frequency resource of paging subframe of described paging source UE for described paging object UE; For described paging object UE, the device identification of described paging object UE, determines whether described paging request message sends to described paging object UE.

Step 506, described paging object UE, according to the device identification of described paging source UE and the timing of existing cellular community frame, determines the corresponding paging running time-frequency resource of paging subframe of described paging source UE;

Described in the Methods and steps 502 that described paging object UE determines the paging subframe corresponding paging video resource of described paging source UE, paging source UE determines that the method for the paging subframe corresponding paging video resource of described paging object UE is identical, do not repeat one by one at this, be the corresponding paging video resource of paging subframe of paging object UE unlike what determine in step 502, and this step is determined is the corresponding paging running time-frequency resource of paging subframe of paging source UE.

Step 507, described paging source UE sends page-response message at the paging subframe corresponding paging running time-frequency resource of described paging source UE to described paging source UE.

Optionally, according to SFN, the SN of described paging source UE corresponding paging running time-frequency resource unit and the FN of described paging source UE corresponding paging running time-frequency resource unit of the described paging source UE corresponding paging running time-frequency resource unit determined, on the described FN of the described time slot that pages reply, send page-response message to paging source UE.

As shown in figure 11 complete the paging request of D2D communication and the schematic diagram of page response process, UE1 is paging object UE, UE2 is paging source UE, and wherein, paging object UE also can be called paged UE.The paging request time slot that UE2 is SFN1 at the System Frame Number of UE1 sends paging request to UE1, UE1 receives the paging request of UE2 transmission at the paging request time slot that System Frame Number is SFN1, and monitor page response at page response time slot, wherein, SFN1 determines according to the device identification of UE1 and the timing of existing cellular community frame.After UE1 receives paging request, carry out analytical analysis, and determine that the System Frame Number of UE2 is SFN2 according to the device identification of UE2 and the timing of existing cellular community frame, the page response time slot being SFN2 at System Frame Number sends page response to UE2, UE2 monitors paging request at the paging request time slot that System Frame Number is SFN2, and receives the page response of UE1 at page response time slot.

The method of paging in a kind of D2D communication that the embodiment of the present invention provides, in the paging resource of oneself, only monitor beep-page message by paging source UE and paging object UE or send beep-page message, and beep-page message distinguishes in time domain and frequency domain, thus effectively reduce conflict, improve paging efficiency, and UE only need monitor beep-page message in the paging subframe of oneself, other times can be in non operating state, such as resting state, is conducive to the economize on electricity of UE.

The device of paging during the embodiment of the present invention provides a kind of D2D to communicate, this device can be paging source UE, as shown in figure 12, this device comprises: the first determining unit 1201, second determining unit 1202, determines SFN module 12021, determine SN module 12022, determine FN module 12023, transmitting element 1203, receiving element 1204.

First determining unit 1201, for by finding that subframe finds paging object UE in D2D communication and determines the device identification of described paging object UE;

Find that subframe is for finding the terminal equipment of surrounding, paging source UE is by finding that subframe finds other neighbouring device and the relevant information of neighbouring device, and for further D2D communication provides condition, wherein relevant information can be device identification.Paging object UE also can be called paged UE.

It should be noted that, each system-frame comprises the subframe of predetermined number, and described subframe comprises discovery subframe, paging subframe and the subframe that communicates.Such as, each system-frame comprises 10 subframes.

According to device identification and the timing of existing cellular community frame of described paging object UE, the second determining unit 1202, for determining the corresponding paging running time-frequency resource of the paging subframe of described paging object UE;

Direct paging when paging subframe main users D2D communicates between paging source UE and paging object UE.Paging subframe is positioned at and finds after subframe and paging subframe and find that subframe is adjacent, the efficiency of communication can be improved like this, when paging source UE is after finding that subframe finds the paging object UE wanting to communicate, just can this paging of paging immediately object UE, set up communication link and start communication, and after paging subframe need not be waited until again, carry out paging again, thus can time delay be reduced, improve communication quality; In addition, be conducive to the consideration of UE economize on electricity, avoid UE to be frequently waken up.Find that subframe and paging subframe are not that each system-frame has, but every N number of described system-frame, have a system-frame comprising described discovery subframe and described paging subframe.N=1 ..., the value of N will be determined according to communicate with honeycomb UE with D2D in the community loading condition of UE of the economize on electricity of UE.

Described paging running time-frequency resource comprises the frequency resource unit FN in the symbol SN of paging subframe in the system frame number SFN of system-frame, described system-frame and described symbol.

Optionally, when described second determining unit 1202 determines the paging subframe of described paging object UE corresponding paging running time-frequency resource, determination SFN module 12021 in described second determining unit 1202, for according to the device identification of described paging object UE and the timing of existing cellular community frame, determine the SFN of described paging object UE;

Determination SN module 12022 in described second determining unit 1202, for the device identification of the device identification according to described paging object UE or the SFN according to described paging object UE and described paging object UE, determines the SN of described paging object UE;

Determination FN module 12023 in described second determining unit 1202, for according to the SFN of described paging object UE and the device identification of described paging object UE, determines the FN of described paging object UE.

According to the corresponding paging video resource of the paging subframe of the paging object UE determined, transmitting element 1203, sends for the described paging subframe corresponding paging running time-frequency resource at described paging object UE the beep-page message being used for D2D communication to described paging object UE.

Described paging subframe comprises paging request time slot and the time slot that pages reply.Described transmitting element 1203 specifically for: on the described FN of the described paging object UE in described paging request time slot, to paging object UE send paging request message.

Described paging request message comprises the device identification of paging source UE and the device identification of described paging object UE; Wherein, the device identification of described paging source UE, determines the corresponding paging running time-frequency resource of paging subframe of described paging source UE for described paging object UE; For described paging object UE, the device identification of described paging object UE, determines whether described paging request message sends to described paging object UE.

Receiving element 1204, at the page response time slot of the paging subframe of described paging source UE, when receiving the page-response message that described paging object UE sends, sets up communication link with described paging object UE and at the enterprising Serial Communication of described communication subframe.

The device of paging during the embodiment of the present invention provides a kind of D2D to communicate, passes through the paging object UE in discovery subframe discovery D2D communication by the first determining unit and determines the device identification of described paging object UE; Second determining unit, according to the device identification of described paging object UE and the timing of existing cellular community frame, determines the corresponding paging running time-frequency resource of the paging subframe of described paging object UE; Transmitting element sends the paging request message being used for D2D communication to described paging object UE at described paging running time-frequency resource.The scheme that the embodiment of the present invention provides can carry out paging according to the paging running time-frequency resource of paging object UE, can improve paging efficiency, reduces error rate.

The device of paging during the embodiment of the present invention provides another kind of D2D to communicate, this device can be paging object UE, as shown in figure 13, this device comprises: receiving element 1301, acquiring unit 1302, determining unit 1303, determine SFN module 13031, determine SN module 13032, determine FN module 13033, transmitting element 1304.

Receiving element 1301, for receiving the paging request message for D2D communication that the paging source UE in D2D communication sends to described paging object UE at the paging subframe corresponding paging running time-frequency resource of paging object UE;

Described paging request message comprises the device identification of described paging source UE and the device identification of described paging object UE.

Acquiring unit 1302, for resolving described paging request message, obtains the device identification of described paging source UE;

Described acquiring unit 1302 specifically for: resolve described paging request message, obtain the device identification of described paging source UE and the device identification of described paging object UE; The device identification of described paging source UE, determines the corresponding paging running time-frequency resource of paging subframe of described paging source UE for described paging object UE; For described paging object UE, the device identification of described paging object UE, determines whether described paging request message sends to described paging object UE.

After described acquiring unit 1302 obtains the device identification of described paging source UE, determining unit 1303, for according to the device identification of described paging source UE and the timing of existing cellular community frame, determines the corresponding paging running time-frequency resource of paging subframe of described paging source UE;

Described paging running time-frequency resource comprises the frequency resource unit FN in the symbol SN of paging subframe in the system frame number SFN of system-frame, described system-frame and described symbol.

Optionally, when described determining unit 1303 determines the paging subframe of described paging source UE corresponding paging running time-frequency resource, determination SFN module 13031 in described determining unit 1303, for according to the device identification of described paging source UE and the timing of existing cellular community frame, determine the SFN of described paging source UE;

Determination SN module 13032 in described determining unit 1303, for the device identification of the device identification according to described paging source UE or the SFN according to described paging object UE and described paging source UE, determines the SN of described paging source UE;

Determination FN module 13033 in described determining unit 1303, for according to the SFN of described paging source UE and the device identification of described paging source UE, determines the FN of described paging source UE.

After described determining unit 1303 determines the corresponding paging running time-frequency resource of paging subframe of described paging source UE, transmitting element 1304, sends page-response message for the paging subframe corresponding paging running time-frequency resource at described paging source UE to described paging source UE.

Each described paging subframe comprises paging request time slot and the time slot that pages reply.Described transmitting element 1304, specifically for the FN according to the SFN of the described paging source UE determined, the SN of described paging source UE and described paging source UE, on the FN of the described paging source UE of the described time slot that pages reply, sends page-response message to paging source UE.

The device of paging during the embodiment of the present invention provides a kind of D2D to communicate, the paging request message for D2D communication of the paging source UE transmission in D2D communication is received by receiving element, then acquiring unit resolves described paging request message, and obtain the device identification of described paging source UE, according to device identification and the timing of existing cellular community frame of described paging source UE, determining unit determines the corresponding paging running time-frequency resource of paging subframe of described paging source UE; Transmitting element sends page-response message to described paging source UE.The scheme that the embodiment of the present invention provides can carry out paging according to the paging running time-frequency resource of paging object UE, can improve paging efficiency, reduces error rate.

It should be noted that, the paging source UE in the embodiment of the present invention and paging object UE can be arbitrary UE.

The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection range of claim.

Claims (12)

1. a method for paging in device-to-device D2D communication, is characterized in that, comprising:
Paging source UE passes through the paging object UE in discovery subframe discovery D2D communication and determines the device identification of described paging object UE;
Described paging source UE is according to the device identification of described paging object UE and the timing of existing cellular community frame, determine the corresponding paging running time-frequency resource of the paging subframe of described paging object UE, described paging running time-frequency resource comprises the frequency resource unit FN in the symbol SN of paging subframe in the system frame number SFN of system-frame, described system-frame and described symbol;
The described device identification according to described paging object UE and the timing of existing cellular community frame, determine that the corresponding paging running time-frequency resource of the paging subframe of described paging object UE comprises:
According to device identification and the timing of existing cellular community frame of described paging object UE, determine the SFN of described paging object UE;
The device identification of the device identification according to described paging object UE or the SFN according to described paging object UE and described paging object UE, determines the SN of described paging object UE;
According to the SFN of described paging object UE and the device identification of described paging object UE, determine the FN of described paging object UE;
Described paging source UE sends the paging request message being used for D2D communication to described paging object UE at described paging running time-frequency resource;
The paging subframe of described paging object UE comprises paging request time slot and the time slot that pages reply;
The described paging request message sent for D2D communication to described paging object UE at described paging running time-frequency resource comprises:
On the FN of the described paging object UE in described paging request time slot, send described paging request message to described paging object UE.
2. method according to claim 1, every N number of described system-frame, has a system-frame comprising described discovery subframe and described paging subframe;
After described paging subframe is positioned at described discovery subframe and described paging subframe is adjacent with described discovery subframe.
3. method according to claim 1, is characterized in that, described paging request message comprises the device identification of paging source UE and the device identification of described paging object UE;
The device identification of described paging source UE, determines the corresponding paging running time-frequency resource of paging subframe of described paging source UE for described paging object UE;
For described paging object UE, the device identification of described paging object UE, determines whether described paging request message sends to described paging object UE.
4. method according to claim 3, is characterized in that, at described paging running time-frequency resource to after described paging object UE sends the paging request message being used for D2D communication, also comprises:
Described paging source UE, at the page response time slot of the paging subframe of described paging source UE, when receiving the page-response message of described paging object UE transmission, sets up communication link with described paging object UE.
5. a method for paging in device-to-device D2D communication, is characterized in that, comprising:
Paging object UE receives the paging request message for D2D communication that the paging source UE in D2D communication sends to described paging object UE at the paging subframe corresponding paging running time-frequency resource of paging object UE;
Described paging object UE resolves described paging request message, obtains the device identification of described paging source UE;
Described paging object UE is according to the device identification of described paging source UE and the timing of existing cellular community frame, determine the corresponding paging running time-frequency resource of paging subframe of described paging source UE, the paging subframe corresponding paging running time-frequency resource of described paging source UE comprises the frequency resource unit FN in the symbol SN of paging subframe in the system frame number SFN of system-frame, described system-frame and described symbol;
The described device identification according to described paging source UE and the timing of existing cellular community frame, determine that the corresponding paging running time-frequency resource of paging subframe of described paging source UE comprises:
According to device identification and the timing of existing cellular community frame of described paging source UE, determine the SFN of described paging source UE;
The device identification of the device identification according to described paging source UE or the SFN according to described paging object UE and described paging source UE, determines the SN of described paging source UE;
According to the SFN of described paging source UE and the device identification of described paging source UE, determine the FN of described paging source UE;
Described paging object UE sends page-response message at the paging subframe corresponding paging running time-frequency resource of described paging source UE to described paging source UE;
The paging subframe of described paging source UE comprises paging request time slot and the time slot that pages reply;
The described paging subframe corresponding paging running time-frequency resource at described paging source UE sends page-response message to described paging source UE and comprises:
On the FN of the described paging source UE of the described time slot that pages reply, send page-response message to paging source UE.
6. method according to claim 5, is characterized in that, the described paging request message of described parsing, and the device identification obtaining described paging source UE comprises:
Resolve described paging request message, obtain the device identification of described paging source UE and the device identification of described paging object UE; The device identification of described paging source UE, determines the corresponding paging running time-frequency resource of paging subframe of described paging source UE for described paging object UE; For described paging object UE, the device identification of described paging object UE, determines whether described paging request message sends to described paging object UE.
7. a device for paging in device-to-device D2D communication, is characterized in that, comprising:
First determining unit, for by finding that subframe finds paging object UE in D2D communication and determines the device identification of described paging object UE;
Second determining unit, for according to the device identification of described paging object UE and the timing of existing cellular community frame, determine the corresponding paging running time-frequency resource of the paging subframe of described paging object UE, described paging running time-frequency resource comprises the frequency resource unit FN in the symbol SN of paging subframe in the system frame number SFN of system-frame, described system-frame and described symbol;
Described second determining unit comprises:
Determine SFN module, for according to the device identification of described paging object UE and the timing of existing cellular community frame, determine the SFN of described paging object UE;
Determine SN module, for the device identification of the device identification according to described paging object UE or the SFN according to described paging object UE and described paging object UE, determine the SN of described paging object UE;
Determine FN module, for according to the SFN of described paging object UE and the device identification of described paging object UE, determine the FN of described paging object UE;
Transmitting element, for sending the paging request message being used for D2D communication to described paging object UE at described paging running time-frequency resource;
The paging subframe of described paging object UE comprises paging request time slot and the time slot that pages reply;
Described transmitting element specifically for:
On the FN of the described paging object UE in described paging request time slot, send described paging request message to described paging object UE.
8. device according to claim 7, is characterized in that, every N number of described system-frame, has a system-frame comprising described discovery subframe and described paging subframe;
After described paging subframe is positioned at described discovery subframe and described paging subframe is adjacent with described discovery subframe.
9. device according to claim 7, is characterized in that, described paging request message comprises the device identification of paging source UE and the device identification of described paging object UE;
The device identification of described paging source UE, determines the corresponding paging running time-frequency resource of paging subframe of described paging source UE for described paging object UE;
For described paging object UE, the device identification of described paging object UE, determines whether described paging request message sends to described paging object UE.
10. device according to claim 9, is characterized in that, described device also comprises:
Receiving element, for the page response time slot of the paging subframe at described paging source UE, when receiving the page-response message of described paging object UE transmission, sets up communication link with described paging object UE.
The device of paging during 11. 1 kinds of device-to-device D2D communicate, is characterized in that, comprising:
Receiving element, for receiving the paging request message for D2D communication that the paging source UE in D2D communication sends to described paging object UE at the paging subframe corresponding paging running time-frequency resource of paging object UE;
Acquiring unit, for resolving described paging request message, obtains the device identification of described paging source UE;
Determining unit, for according to the device identification of described paging source UE and the timing of existing cellular community frame, determine the corresponding paging running time-frequency resource of paging subframe of described paging source UE, the paging subframe corresponding paging running time-frequency resource of described paging source UE comprises the frequency resource unit FN in the symbol SN of paging subframe in the system frame number SFN of system-frame, described system-frame and described symbol;
Described determining unit comprises:
Determine SFN module, for according to the device identification of described paging source UE and the timing of existing cellular community frame, determine the SFN of described paging source UE;
Determine SN module, for the device identification of the device identification according to described paging source UE or the SFN according to described paging object UE and described paging source UE, determine the SN of described paging source UE;
Determine FN module, for according to the SFN of described paging source UE and the device identification of described paging source UE, determine the FN of described paging source UE;
Transmitting element, sends page-response message for the paging subframe corresponding paging running time-frequency resource at described paging source UE to described paging source UE;
The paging subframe of described paging source UE comprises paging request time slot and the time slot that pages reply;
Described transmitting element specifically for:
On the FN of the described paging source UE of the described time slot that pages reply, send page-response message to paging source UE.
12. devices according to claim 11, is characterized in that, described acquiring unit specifically for:
Resolve described paging request message, obtain the device identification of described paging source UE and the device identification of described paging object UE; The device identification of described paging source UE, determines the corresponding paging running time-frequency resource of paging subframe of described paging source UE for described paging object UE; For described paging object UE, the device identification of described paging object UE, determines whether described paging request message sends to described paging object UE.
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CN102098783A (en) * 2007-12-03 2011-06-15 华为技术有限公司 Equipment for determining paging moment

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US10536980B2 (en) 2013-04-03 2020-01-14 China Academy Of Telecommunications Technology Method, device and system for interacting link information

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