CN107079441A - Method, access point and terminal that resource is indicated - Google Patents

Method, access point and terminal that resource is indicated Download PDF

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Publication number
CN107079441A
CN107079441A CN201580060913.5A CN201580060913A CN107079441A CN 107079441 A CN107079441 A CN 107079441A CN 201580060913 A CN201580060913 A CN 201580060913A CN 107079441 A CN107079441 A CN 107079441A
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CN
China
Prior art keywords
d2d
terminal
ap
field
running time
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CN201580060913.5A
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Chinese (zh)
Inventor
朱俊
林英沛
罗俊
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华为技术有限公司
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Priority to PCT/CN2015/070632 priority Critical patent/WO2016112499A1/en
Publication of CN107079441A publication Critical patent/CN107079441A/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
    • H04W72/04Wireless resource allocation

Abstract

The embodiment of the present invention provides method, access point and the terminal that a kind of resource is indicated, can reduce expense, raising system throughput that the resource transmitted for D2D is indicated.This method includes:Access point AP generations carry the radio frames of resource allocation information and D2D marks, wherein resource allocation information is used for the first running time-frequency resource communicated for D2D for indicating that AP distributes for first terminal and second terminal, and D2D is identified for indicating the first D2D marks that AP distributes for first terminal and second terminal.AP sends radio frames to first terminal and second terminal, to cause first terminal and second terminal to carry out D2D communications by the first running time-frequency resource.The D2D resources of the embodiment of the present invention indicate not including the information based on D2D terminals such as modulation system, coded format, space-time flow amount, so as to save the resource overhead of D2D resource distribution instructions.

Description

Method, access point and the terminal of resource instruction Technical field

The present invention relates to the communications fields, and more particularly, to method, access point and the terminal of resource instruction.

Background technique

Compared to wired data transfer, wireless transmission has lower Bit Transmission Rate.With the continuous growth of communication equipment quantity, signal transmission frequency spectrum used becomes more and more crowded, and air interface will become the key constraints of communication system at this time.Device-to-device (D2D, Device to Device), which transmits, to be referred in the wireless network, the direct communication between two communication equipments.The introducing of the D2D communication technology, can be improved the spectrum utilization efficiency of mobile network, and be able to ascend the capacity of air interface.When a plurality of D2D communication link uses same asset, the promotion of spectrum efficiency is particularly evident.

However, still lacking effective D2D resource distribution instruction mechanism at present.

Summary of the invention

The embodiment of the present invention provides method, access point and the terminal of a kind of resource instruction, can reduce the expense of the resource instruction for D2D transmission, improves system throughput.

First aspect, provide a kind of method of resource instruction, it include: that access point AP generates the radio frames for carrying resource allocation information and D2D mark, wherein the resource allocation information is used to indicate the first running time-frequency resource for D2D communication that the AP is first terminal and second terminal is distributed, and the D2D mark is used to indicate the first D2D mark that the AP is the first terminal and the second terminal is distributed;The AP sends the radio frames to the first terminal and the second terminal, so that the first terminal and the second terminal carry out D2D communication by first running time-frequency resource.

With reference to first aspect, in the first implementation of first aspect, the radio frames include D2D configuration field and D2D map field, the D2D configuration field is used to indicate the location information that the radio frames include the D2D map field and the D2D map field, the D2D map field includes the location information and the first D2D mark of first running time-frequency resource, wherein first running time-frequency resource is located at the subsequent upstream frame of the radio frames.

With reference to first aspect and its above-mentioned implementation, in second of implementation of first aspect, the D2D configuration field and the D2D map field are located at after the legacy preamble field of the radio frames Non-traditional signaling field.

With reference to first aspect and its above-mentioned implementation, in the third implementation of first aspect, the D2D configuration field is located at the HEW-SIG part A of the non-traditional signaling field or the HEW-SIG part B of the non-traditional signaling field, and the D2D map field is located at the HEW-SIG part B of the non-traditional signaling field.

With reference to first aspect and its above-mentioned implementation, in the 4th kind of implementation of first aspect, the D2D configuration field is located at the non-traditional signaling field of the radio frames or the data portion of the radio frames, and the D2D map field is located at the data portion of the radio frames.

With reference to first aspect and its above-mentioned implementation, in the 5th kind of implementation of first aspect, the radio frames include map field, the map field is located at the HEW-SIG part B of the radio frames or the data portion of the radio frames, at least one bit of the starting of the map field is D2D map field for identifying the map field, the D2D map field includes the location information and the first D2D mark of first running time-frequency resource, wherein first running time-frequency resource is located at the subsequent upstream frame of the radio frames.

With reference to first aspect and its above-mentioned implementation, in the 6th kind of implementation of first aspect, the D2D map field only includes the resource allocation information and D2D mark.

With reference to first aspect and its above-mentioned implementation, in the 7th kind of implementation of first aspect, the D2D map field only includes the resource allocation information, D2D mark and D2D power control information.

With reference to first aspect and its above-mentioned implementation, in the 8th kind of implementation of first aspect, described access point AP is generated before the radio frames for carrying resource allocation information and D2D mark, further include: the request message that the first terminal is sent is received, the request message is used for the D2D communication link for requesting to establish between the second terminal;The request message is sent to the second terminal;The response message that the second terminal is sent is received, the response message is used to indicate the second terminal and agrees to establish D2D communication link with the first terminal.

With reference to first aspect and its above-mentioned implementation, in the 9th kind of implementation of first aspect, the request message carries the first information list for the adjacent terminals that the first terminal detects, the response message carries the second information list of the adjacent terminals that the second terminal detects, after the response message for receiving the second terminal transmission, further include: determine the running time-frequency resource and D2D mark in the existing D2D list of the AP, whether occupied by the terminal in the first information list and second information list, wherein, the existing D2D list of the AP includes having been established what D2D was communicated to connect The occupied running time-frequency resource of terminal and D2D mark;When the running time-frequency resource and D2D mark in the existing D2D list of the AP, when all being occupied by the terminal in the first information list and second information list, for the first terminal and second terminal distribution in the existing D2D list of the AP running time-frequency resource and D2D identifies different first running time-frequency resource and the first D2D is identified;When the running time-frequency resource and D2D mark in the existing D2D list of the AP, when part is occupied by the terminal in the first information list and second information list, it is identified for one that the first terminal and the second terminal are distributed in the running time-frequency resource not occupied by the terminal in the first information list and second information list in the existing D2D list of the AP and D2D mark as first running time-frequency resource and the first D2D, or for the first terminal and second terminal distribution in the existing D2D list of the AP running time-frequency resource and D2D identifies different first running time-frequency resource and the first D2D is identified;When the running time-frequency resource and D2D mark in the existing D2D list of the AP, when not occupied by the terminal in the first information list and second information list, for the first terminal and second terminal distribution in the existing D2D list of the AP running time-frequency resource and D2D identifies identical or different first running time-frequency resource and the first D2D is identified.

With reference to first aspect and its above-mentioned implementation, in the tenth kind of implementation of first aspect, described access point AP determination is established after the D2D communication link between first terminal and second terminal, further include: D2D link establishment confirmation message is sent to the first terminal and the second terminal respectively, wherein, the D2D link establishment confirmation message includes the first D2D mark.

With reference to first aspect and its above-mentioned implementation, in a kind of the tenth implementation of first aspect, the method also includes: it receives the first terminal or D2D link that the second terminal is sent releases request;D2D link, which is sent, to the first terminal and the second terminal releases message.

With reference to first aspect and its above-mentioned implementation, in the 12nd kind of implementation of first aspect, the method also includes: when the AP determines that the first terminal or the second terminal are disconnected with the AP, or it is long when reaching threshold value in the presence of the D2D link between the first terminal and the second terminal, Xiang Suoshu first terminal and the second terminal send D2D link and release message.

Second aspect, provide a kind of method of resource instruction, it include: that first terminal receives the radio frames for carrying resource allocation information and D2D mark that access point AP is sent, wherein the resource allocation information is used to indicate the first running time-frequency resource for D2D communication that the AP is the first terminal and second terminal is distributed, and the D2D mark is used to indicate the first D2D mark that the AP is the first terminal and the second terminal is distributed;The first terminal negotiates code modulation mode by first running time-frequency resource and the second terminal;The first terminal passes through the time-frequency according to the code modulation mode Resource and the second terminal carry out D2D communication.

In conjunction with second aspect, in the first implementation of second aspect, the radio frames include D2D configuration field and D2D map field, the D2D configuration field is used to indicate the location information that the radio frames include the D2D map field and the D2D map field, the D2D map field includes the location information and the first D2D mark of first running time-frequency resource, wherein first running time-frequency resource is located at the subsequent upstream frame of the radio frames.

In conjunction with second aspect and its above-mentioned implementation, in second of implementation of second aspect, the D2D configuration field and the D2D map field are located at the non-traditional signaling field after the legacy preamble field of the radio frames.

In conjunction with second aspect and its above-mentioned implementation, in the third implementation of second aspect, the D2D configuration field is located at the HEW-SIG part A of the non-traditional signaling field or the HEW-SIG part B of the non-traditional signaling field, and the D2D map field is located at the HEW-SIG part B of the non-traditional signaling field.

In conjunction with second aspect and its above-mentioned implementation, in the 4th kind of implementation of second aspect, the D2D configuration field is located at the non-traditional signaling field of the radio frames or the data portion of the radio frames, and the D2D map field is located at the data portion of the radio frames.

In conjunction with second aspect and its above-mentioned implementation, in the 5th kind of implementation of second aspect, the radio frames include map field, the map field is located at the HEW-SIG part B of the radio frames or the data portion of the radio frames, at least one bit of the starting of the map field is D2D map field for identifying the map field, the D2D map field includes the location information and the first D2D mark of first running time-frequency resource, wherein first running time-frequency resource is located at the subsequent upstream frame of the radio frames.

In conjunction with second aspect and its above-mentioned implementation, in the 6th kind of implementation of second aspect, the D2D map field only includes the resource allocation information and D2D mark.

In conjunction with second aspect and its above-mentioned implementation, in the 7th kind of implementation of second aspect, the D2D map field only includes the resource allocation information, D2D mark and D2D power control information.

In conjunction with second aspect and its above-mentioned implementation, in the 8th kind of implementation of second aspect, the first terminal receives before the radio frames that access point AP is sent, further include: Xiang Suoshu AP sends the request message for requesting the D2D communication link established between the second terminal, so that the AP sends the request message to the second terminal, and the second terminal is received according to the request The response message that message is sent, the response message are used to indicate the second terminal and agree to establish D2D communication link with the first terminal.

In conjunction with second aspect and its above-mentioned implementation, in the 9th kind of implementation of second aspect, the request message carries the first information list for the adjacent terminals that the first terminal detects, the response message carries the second information list of the adjacent terminals that the second terminal detects, in order to which the AP is according to the first information list, the existing D2D list of second information list and the AP, first running time-frequency resource and the first D2D mark for the first terminal and second terminal distribution for D2D communication, wherein, the existing D2D list of the AP includes the occupied running time-frequency resource of terminal and D2D mark that D2D communication connection has been established.

In conjunction with second aspect and its above-mentioned implementation, in the tenth kind of implementation of second aspect, the first terminal receives before the radio frames that access point AP is sent, further include: receive the D2D link establishment confirmation message that the AP is sent, wherein, the D2D link establishment confirmation message carries the first D2D mark.

The third aspect, provide a kind of access point AP, it include: generation unit, for generating the radio frames for carrying resource allocation information and D2D mark, wherein the resource allocation information is used to indicate the first running time-frequency resource for D2D communication that the AP is first terminal and second terminal is distributed, and the D2D mark is used to indicate the first D2D mark that the AP is the first terminal and the second terminal is distributed;Transmission unit, for sending the radio frames to the first terminal and the second terminal, so that the first terminal and the second terminal carry out D2D communication by first time-frequency.

In conjunction with the third aspect, in the first implementation of the third aspect, the radio frames include D2D configuration field and D2D map field, the D2D configuration field is used to indicate the location information that the radio frames include the D2D map field and the D2D map field, the D2D map field includes the location information and the first D2D mark of first running time-frequency resource, wherein first running time-frequency resource is located at the subsequent upstream frame of the radio frames.

In conjunction with the third aspect and its above-mentioned implementation, in second of implementation of the third aspect, the D2D configuration field and the D2D map field are located at the non-traditional signaling field after the legacy preamble field of the radio frames.

In conjunction with the third aspect and its above-mentioned implementation, in the third implementation of the third aspect, the D2D configuration field is located at the HEW-SIG part A of the non-traditional signaling field or the HEW-SIG part B of the non-traditional signaling field, and the D2D map field is located at the HEW-SIG part B of the non-traditional signaling field.

In conjunction with the third aspect and its above-mentioned implementation, in the 4th kind of implementation of the third aspect, the D2D configuration field is located at the non-traditional signaling field of the radio frames or the data portion of the radio frames, and the D2D map field is located at the data portion of the radio frames.

In conjunction with the third aspect and its above-mentioned implementation, in the 5th kind of implementation of the third aspect, the radio frames include map field, the map field is located at the HEW-SIG part B of the radio frames or the data portion of the radio frames, at least one bit of the starting of the map field is D2D map field for identifying the map field, the D2D map field includes the location information and the first D2D mark of first running time-frequency resource, wherein first running time-frequency resource is located at the subsequent upstream frame of the radio frames.

In conjunction with the third aspect and its above-mentioned implementation, in the 6th kind of implementation of the third aspect, the D2D map field only includes the resource allocation information and D2D mark.

In conjunction with the third aspect and its above-mentioned implementation, in the 7th kind of implementation of the third aspect, the D2D map field only includes the resource allocation information, D2D mark and D2D power control information.

In conjunction with the third aspect and its above-mentioned implementation, in the 8th kind of implementation of the third aspect, the AP further includes receiving unit, the determination unit is specifically used for: passing through the receiving unit, the request message that the first terminal is sent is received, the request message is used for the D2D communication link for requesting to establish between the second terminal;By the transmission unit, Xiang Suoshu second terminal sends the request message;By the receiving unit, the response message that the second terminal is sent is received, the response message is used to indicate the second terminal and agrees to establish D2D communication link with the first terminal.

In conjunction with the third aspect and its above-mentioned implementation, in the 9th kind of implementation of the third aspect, the request message carries the first information list for the adjacent terminals that the first terminal detects, the response message carries the second information list of the adjacent terminals that the second terminal detects, the determination unit is also used to: determining the running time-frequency resource and D2D mark in the existing D2D list of the AP, whether occupied by the terminal in the first information list and second information list, wherein, the existing D2D list of the AP includes the occupied running time-frequency resource of terminal and D2D mark that D2D communication connection has been established;When the running time-frequency resource and D2D mark in the existing D2D list of the AP, when all being occupied by the terminal in the first information list and second information list, for the first terminal and second terminal distribution in the existing D2D list of the AP running time-frequency resource and D2D identifies different first running time-frequency resource and the first D2D is identified;When the running time-frequency resource and D2D mark in the existing D2D list of the AP, partially by the first information list and second information list When terminal occupies, identified for one that the first terminal and the second terminal are distributed in the existing D2D list of the AP in the running time-frequency resource not occupied by the terminal in the first information list and second information list and D2D mark as first running time-frequency resource and the first D2D, or for the first terminal and second terminal distribution in the existing D2D list of the AP running time-frequency resource and D2D identifies different first running time-frequency resource and the first D2D is identified;When the running time-frequency resource and D2D mark in the existing D2D list of the AP, when not occupied by the terminal in the first information list and second information list, for the first terminal and second terminal distribution in the existing D2D list of the AP running time-frequency resource and D2D identifies identical or different first running time-frequency resource and the first D2D is identified.

In conjunction with the third aspect and its above-mentioned implementation, in the tenth kind of implementation of the third aspect, the transmission unit is also used to: sending D2D link establishment confirmation message to the first terminal and the second terminal respectively, wherein, the D2D link establishment confirmation message includes the first D2D mark.

In conjunction with the third aspect and its above-mentioned implementation, in a kind of the tenth implementation of the third aspect, the AP further includes receiving unit, and the receiving unit is used for: receiving the first terminal or D2D link that the second terminal is sent releases request;The transmission unit is also used to, and Xiang Suoshu first terminal and the second terminal send D2D link and release message.

In conjunction with the third aspect and its above-mentioned implementation, in the 12nd kind of implementation of the third aspect, the transmission unit is also used to: when the AP determines that the first terminal or the second terminal are disconnected with the AP, or it is long when reaching threshold value in the presence of the D2D link between the first terminal and the second terminal, Xiang Suoshu first terminal and the second terminal send D2D link and release message.

Fourth aspect, provide a kind of terminal, it include: receiving unit, for receiving the radio frames for carrying resource allocation information and D2D mark of access point AP transmission, it is the first running time-frequency resource for D2D communication that the terminal and second terminal are distributed that wherein the resource allocation information, which is used to indicate the AP, and it is the first D2D mark that the terminal and the second terminal are distributed that the D2D mark, which is used to indicate the AP,;Negotiation element, for negotiating code modulation mode by first running time-frequency resource and the second terminal;Communication unit, for carrying out D2D communication by the running time-frequency resource and the second terminal according to the code modulation mode.

In conjunction with fourth aspect, in the first implementation of fourth aspect, the radio frames include D2D configuration field and D2D map field, the D2D configuration field is used to indicate the location information that the radio frames include the D2D map field and the D2D map field, the D2D map field includes the location information and the first D2D mark of first running time-frequency resource, wherein when described first Frequency resource is located at the subsequent upstream frame of the radio frames.

In conjunction with fourth aspect and its above-mentioned implementation, in second of implementation of fourth aspect, the D2D configuration field and the D2D map field are located at the non-traditional signaling field after the legacy preamble field of the radio frames.

In conjunction with fourth aspect and its above-mentioned implementation, in the third implementation of fourth aspect, the D2D configuration field is located at the HEW-SIG part A of the non-traditional signaling field or the HEW-SIG part B of the non-traditional signaling field, and the D2D map field is located at the HEW-SIG part B of the non-traditional signaling field.

In conjunction with fourth aspect and its above-mentioned implementation, in the 4th kind of implementation of fourth aspect, the D2D configuration field is located at the non-traditional signaling field of the radio frames or the data portion of the radio frames, and the D2D map field is located at the data portion of the radio frames.

In conjunction with fourth aspect and its above-mentioned implementation, in the 5th kind of implementation of fourth aspect, the radio frames include map field, the map field is located at the HEW-SIG part B of the radio frames or the data portion of the radio frames, at least one bit of the starting of the map field is D2D map field for identifying the map field, the D2D map field includes the location information and the first D2D mark of first running time-frequency resource, wherein first running time-frequency resource is located at the subsequent upstream frame of the radio frames.

In conjunction with fourth aspect and its above-mentioned implementation, in the 6th kind of implementation of fourth aspect, the D2D map field only includes the resource allocation information and D2D mark.

In conjunction with fourth aspect and its above-mentioned implementation, in the 7th kind of implementation of fourth aspect, the D2D map field only includes the resource allocation information, D2D mark and D2D power control information.

In conjunction with fourth aspect and its above-mentioned implementation, in the 8th kind of implementation of fourth aspect, the communication unit is also used to: Xiang Suoshu AP sends the request message for requesting the D2D communication link established between the second terminal, so that the AP sends the request message to the second terminal, and the response message that the second terminal is sent according to the request message is received, the response message is used to indicate the second terminal and agrees to establish D2D communication link with the first terminal.

In conjunction with fourth aspect and its above-mentioned implementation, in the 9th kind of implementation of fourth aspect, the request message carries the first information list for the adjacent terminals that the terminal detects, the response message carries the second information list of the adjacent terminals that the second terminal detects, in order to which the AP is according to the existing D2D list of the first information list, second information list and the AP, it is First running time-frequency resource and the first D2D mark of the terminal and second terminal distribution for D2D communication, wherein the existing D2D list of the AP includes the occupied running time-frequency resource of terminal and D2D mark that D2D communication connection has been established.

In conjunction with fourth aspect and its above-mentioned implementation, in the tenth kind of implementation of fourth aspect, the communication unit is also used to: receiving the D2D link establishment confirmation message that the AP is sent, wherein the D2D link establishment confirmation message carries the first D2D mark.

The embodiment of the present invention generates the radio frames for carrying resource allocation information and D2D mark by access point AP, wherein resource allocation information is used to indicate the first running time-frequency resource for D2D communication that AP is first terminal and second terminal is distributed, D2D mark is used to indicate the first D2D mark that AP is first terminal and second terminal is distributed, AP sends the radio frames to first terminal and second terminal, so that first terminal and second terminal negotiate code modulation mode by the first running time-frequency resource and carry out D2D communication, to provide a kind of feasible resource distribution instruction mechanism.

Detailed description of the invention

To describe the technical solutions in the embodiments of the present invention more clearly, attached drawing needed in the embodiment of the present invention will be briefly described below, apparently, drawings described below is only some embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is the flow chart of the method for the resource instruction of one embodiment of the invention.

Fig. 2 is the flow chart of the method for the resource instruction of one embodiment of the invention.

Fig. 3 is the structure chart of the radio frames of one embodiment of the invention.

Fig. 4 is the structure chart of the radio frames of another embodiment of the present invention.

Fig. 5 is the structure chart of the radio frames of another embodiment of the present invention.

Fig. 6 is the flow chart of the D2D link establishment of one embodiment of the invention.

Fig. 7 is the flow chart that the D2D link of one embodiment of the invention releases.

Fig. 8 is the flow chart that the D2D link of another embodiment of the present invention releases.

Fig. 9 is the schematic block diagram of the access point of one embodiment of the invention.

Figure 10 is the schematic block diagram of the terminal of one embodiment of the invention.

Figure 11 is the schematic block diagram of the access point of another embodiment of the present invention.

Figure 12 is the schematic block diagram of the terminal of another embodiment of the present invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is a part of the embodiments of the present invention, rather than whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art's every other embodiment obtained without making creative work, all should belong to the scope of protection of the invention.

Technical solution of the present invention, it can be applied to various communication systems, such as: global system for mobile communications (GSM, Global System of Mobile communication), CDMA (CDMA, Code Division Multiple Access) system, wideband code division multiple access (WCDMA, Wideband Code Division Multiple Access Wireless), General Packet Radio Service (GPRS, General Packet Radio Service), long term evolution (LTE, Long Term Evolution) etc..

User equipment (UE, User Equipment), also referred to as mobile terminal (Mobile Terminal), mobile subscriber equipment etc., can through wireless access network (such as, RAN, Radio Access Network) it is communicated with one or more core nets, user equipment can be mobile terminal, such as mobile phone (or be " honeycomb " phone) and the computer with mobile terminal, such as, it can be portable, pocket, hand-held, built-in computer or vehicle-mounted mobile device, they exchange language and/or data with wireless access network.

In technical solution of the present invention, terminal can be user site (STA in WLAN, Station), the user site is referred to as system, subscriber unit, access terminal, movement station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless telecom equipment, user agent, user apparatus or UE (User Equipment, user equipment).The STA can be cellular phone, wireless phone, SIP (Session Initiation Protocol, session initiation protocol) phone, WLL (Wireless Local Loop, wireless local loop) it stands, PDA (Personal Digital Assistant, personal digital assistant), the handheld device with WLAN (such as Wi-Fi) communication function, calculate equipment or be connected to other processing equipments of radio modem.Access point (AP, Access Point) can be used for being communicated with access terminal by WLAN, and the data that the data of access terminal are transmitted to network side or automatic network in future side are transmitted to access terminal.

Hereinafter, in order to facilitate understanding and explanation, it is non-limiting as example, implementation procedure and movement of the method and apparatus of transmission data of the invention in Wi-Fi system are illustrated.

Wi-Fi system frame structure is mainly by lead code, service field, data field, the composition such as trailer field.Wherein lead code mainly realizes that frame detects, automatic growth control, offset estimation, time synchronization, the functions such as channel estimation.Lead code can be divided into legacy fields part and non-traditional field portions.

Usually, the legacy fields part of lead code includes three fields, that is: Legacy Short Training Field (L-STF, Legacy-Short Training Field), traditional long training field (L-LTF, Legacy-Long Training Field) and traditional signaling message (L-SIG, Legacy-Signal) field.Wherein, L-STF field is for frame starting detection, automatic growth control (AGC, Auto Gain Control) setting, initial frequency drift estimation and initial time synchronization;L-LTF is used for more accurate Frequency offset estimation and time synchronization, is also used to generate channel estimation for reception and even weighing apparatus L-SIG;L-SIG field is mainly used for carrying data-rate information and data length information, so that receiving device can be according to the data-rate information and data length information, the length of the determining data that same frame is carried on the lead code, and then can determine the appropriate time for keeping idle.

Non-traditional field portions can be other fields in lead code other than above-mentioned conventional part.Unconventional parts specifically include the version which field depends on 802.11 standards.Currently, the version of 802.11 standards has evolved to the 802.11ax of 802.11g, 802.11n, 802.11ac and newest proposition from 802.11a/b.Backwards compatibility between product and interoperability in order to guarantee different 802.11 Standard Editions define mixed format (MF, Mixed Format) lead code (hereinafter referred to as lead code) since 802.11n.The legacy fields part of lead code is identical as the preamble field of 802.11a, all includes Legacy Short Training Field, traditional long training field and legacy signaling field.Lead code after 802.11n further includes non-traditional field portions other than legacy fields part, specifically includes non-traditional signaling field, non-traditional short training field and non-traditional long training field etc..Wherein for the non-traditional field portions of 802.11n with high-throughput (HT, High Throughput) name, i.e., non-traditional field portions include high-throughput signaling field, high-throughput short training field and high-throughput long training field.The non-traditional field portions of 802.11ac are with very high-throughput (VHT, Very High Throughput) name, i.e. non-traditional field portions include, very high-throughput signaling field A, very high-throughput short training field, very high-throughput long training field and very high-throughput signaling field B.In several versions of existing 802.11 standard, the differentiation of diversity of protocol versions and the automatic detection of receiving end can be realized by the modulation system of the symbol after lead code legacy fields.

Fig. 1 is the flow chart of the method for the resource instruction of one embodiment of the invention.The method of Fig. 1 can be executed by the access point AP in wlan system.

101, AP generates the radio frames for carrying resource allocation information and D2D mark, wherein resource allocation information is used to indicate the first running time-frequency resource for D2D communication that AP is first terminal and second terminal is distributed, and D2D mark is used to indicate the first D2D mark that AP is first terminal and second terminal is distributed.

102, AP send radio frames to first terminal and second terminal, so that first terminal and second is eventually Code modulation mode is negotiated by the first running time-frequency resource and carries out D2D communication in end.

The embodiment of the present invention generates the radio frames for carrying resource allocation information and D2D mark by access point AP, wherein resource allocation information is used to indicate the first running time-frequency resource for D2D communication that AP is first terminal and second terminal is distributed, D2D mark is used to indicate the first D2D mark that AP is first terminal and second terminal is distributed, AP sends radio frames to first terminal and second terminal, so that first terminal and second terminal negotiate code modulation mode by the first running time-frequency resource and carry out D2D communication, so as to reduce the expense of the resource instruction for D2D transmission, improve system throughput.

Optionally, as one embodiment, radio frames include D2D configuration field and D2D map field, D2D configuration field is used to indicate the location information that radio frames include D2D map field and D2D map field, D2D map field includes the location information and the first D2D mark of the first running time-frequency resource, wherein the first running time-frequency resource is located at the subsequent upstream frame of radio frames.

Specifically, the radio frames of wlan system are mainly made of legacy preamble part, non-traditional leading part, sub-frame of uplink and downlink subframe.Wherein legacy preamble part can be made of tri- fields of L-STF, L-LTF and L-SIG, and non-traditional leading part can be made of non-traditional signaling field, non-traditional short training field and non-traditional long training field.In the embodiment of the present invention, D2D configuration field and D2D map field can be carried by above-mentioned non-traditional signaling field.It should be understood that the specific name and structure of non-traditional leading part can be determined that the present invention does not limit this by Wi-Fi protocol version.

D2D configuration field can specifically include two subfields, be respectively intended to indicate in the radio frames with the presence or absence of the location information of D2D map field and D2D map field in the radio frames.Such as, first bit of D2D configuration field can be used to refer in the radio frames with the presence or absence of D2D map field, as a specific example, first bit of D2D configuration field can be set as to " 1 " indicates that being set as " 0 " in the radio frames there are D2D map field indicates that there is no D2D map fields in the radio frames;Subsequent multiple bits of D2D configuration field can be used to refer to location information of the D2D map field in the radio frames, and the specific location of D2D map field can specifically be explicitly indicated by the position and offset of initial bits position of the instruction D2D map field in radio frames.

D2D map field may include one or more in resource allocation information, D2D mark and D2D power control information.But the information based on D2D terminal such as modulation system, coded format, empty time stream number are not included.Specifically, resource allocation information can be by subframe index (SF index) bit, starting resource block (Start RB) bit and offset (offset) bit composition.Wherein subframe index bit, which is used to indicate, distributes to the running time-frequency resource of D2D transmission and is located at which subframe of radio frames, starting resource block bit be used to indicate distribute to the running time-frequency resource that D2D is transmitted initial position be located at the subframe which Resource block, offset bit are used to indicate the running time-frequency resource for distributing to D2D transmission in temporal duration and in the bandwidth information of frequency domain.

Radio frames in the present embodiment are uplink and downlink concatenated sub frames structure, that is to say, that the running time-frequency resource that D2D transmission is distributed to indicated by D2D map field is located in sub-frame of uplink.

Optionally, it is located at the non-traditional signaling field after the legacy preamble field of radio frames as one embodiment, D2D configuration field and D2D map field.

D2D configuration field and D2D map field can be carried by non-traditional signaling field, more specifically, can be carried by the first part (HEW-SIG A) of its non-traditional signaling field and second part (HEW-SIG B) by taking 802.11ax as an example.It should be understood that, for 802.11ax lead code, its non-traditional field can be with high efficiency WLAN (HEW, High Efficiency WLAN), or high efficiency (HE, High Efficiency) name, i.e. non-traditional field portions include, high efficiency WLAN signaling (HEW-SIG) field, high efficiency WLAN Short Training (HEW-STF) field and long training (HEW-LTF) field of high efficiency WLAN, or high efficiency signaling (HE-SIG) field, high efficiency Short Training (HE-STF) field and long training (HE-LTF) field of high efficiency.The present invention does not limit the name of the non-traditional field of 802.11ax lead code, for the convenience of description, following embodiment is mainly illustrated by taking HEW-SIG as an example.

Optionally, as one embodiment, D2D configuration field is located at the HEW-SIG part A of non-traditional signaling field or the HEW-SIG part B of non-traditional signaling field, and D2D map field is located at the HEW-SIG part B of non-traditional signaling field.

In one embodiment, D2D configuration field can be located at HEW-SIG part A, and D2D map field can be located at HEW-SIG part B.

In another embodiment, D2D configuration field and D2D map field position can be all located at HEW-SIG part B.

Optionally, as one embodiment, D2D configuration field is located at the non-traditional signaling field of radio frames or the data portion of radio frames, and D2D map field is located at the data portion of radio frames.Specifically, under the scene for establishing uplink by the way of trigger frame, D2D configuration field can both be located at the non-traditional signaling field of trigger frame, the data portion that can also be located at after trigger frame, and D2D map field can be located at the data portion of radio frames.Analogously with above-described embodiment, D2D configuration field be used to indicate trigger frame whether include D2D map field and D2D map field location information, D2D map field is used to indicate the position for distributing to the running time-frequency resource of D2D transmission and D2D mark, and wherein running time-frequency resource indicated by D2D map field is located at the subsequent uplink frame of trigger frame.Similarly, D2D map field can To include one or more in resource allocation information, D2D mark and D2D power control information.But the information based on D2D terminal such as modulation system, coded format, empty time stream number are not included.

Optionally, as one embodiment, radio frames include map field, map field is located at the HEW-SIG part B of radio frames or the data portion of radio frames, at least one bit of the starting of map field is D2D map field for identity map field, D2D map field includes the location information and the first D2D mark of the first running time-frequency resource, wherein the first running time-frequency resource is located at the subsequent upstream frame of radio frames.

Specifically, radio frames can also only include D2D map field, and not include D2D configuration field.Wherein D2D map field can be used as a subclass, is identified by one or more bits that field originates.As an example, being specifically identified method can be as shown in Table 1:

Table one

Identification bit Map field subclass 00 Downlink map 01 Uplink mapping 10 D2D mapping 11 It is reserved

When receiving end reads identification bit, it can then identify the map field specifically subclass, such as when D2D equipment reads " 10 " identification bit, then it is confirmed as D2D map field, it can continue the specific location that reading subsequent bits know the D2D resource of distribution, if D2D equipment reads " 00 " identification bit, discarding can choose.It should be understood that illustrating for convenience, table one is only an example, and the mode of being specifically identified is not limited to this.

Optionally, as one embodiment, D2D map field only includes resource allocation information and D2D mark.But the information based on D2D terminal such as modulation system, coded format, empty time stream number are not included, specifically modulation system, coded format etc. can voluntarily be negotiated to determine after D2D connection foundation by D2D communication terminal, so as to save the resource overhead of D2D resource distribution instruction, and it can be improved D2D terminal and read the speed of D2D map field (D2D resource impact information), to improve the speed of D2D connection foundation.

Optionally, as one embodiment, D2D map field only includes resource allocation information, D2D mark and D2D power control information.But the information based on D2D terminal such as modulation system, coded format, empty time stream number are not included, specifically modulation system, coded format etc. can voluntarily be negotiated to determine after D2D connection foundation by D2D communication terminal, so as to save the resource overhead of D2D resource distribution instruction, and it can be improved D2D terminal and read D2D map field (D2D resource impact information) Speed, to improve the speed of D2D connection foundation.

Optionally, as one embodiment, AP is generated before the radio frames for carrying resource allocation information and D2D mark, further includes: receives the request message that first terminal is sent, request message is used for the D2D communication link for requesting to establish between second terminal;Request message is sent to second terminal;The response message that second terminal is sent is received, response message is used to indicate second terminal and agrees to establish D2D communication link with first terminal.

First terminal (STA1) is needing to carry out D2D communication with second terminal (STA2), and when STA1 detects that STA2 meets condition (distance, the signal quality etc.) for carrying out D2D communication with it, then STA1 can send the request message that D2D link is established with STA2 to AP, which may include STA1 in the metrical information (lists of such as adjacent terminals) of D2D discovery phase.After AP receives the D2D request for building link message of STA1 transmission, the request message that STA1 and STA2 establishes D2D link is sent to D2D targeted sites STA2.

STA2 is after receiving the request message, it is determined whether agrees to establish D2D link with STA1, and replys response message to AP.Specifically, if STA2 agrees to and STA1 establishes D2D link, then the response message may include STA2 in the metrical information (such as adjacent terminals list) of D2D discovery phase, otherwise not include STA2 in the metrical information (such as adjacent terminals list) of D2D discovery phase.

AP judges whether STA2 agrees to establish D2D communication link with STA1 after receiving the response message of STA2.If it is determined that STA2 is disagreed, then AP replys D2D link establishment response to STA1 to refuse the D2D link request of STA1.If it is determined that STA1 agrees to, then whether AP checks STA of the AP locally in existing D2D list in the adjacent terminals list that STA1 and STA2 are reported according to the metrical information (such as adjacent terminals list) of STA1 and STA2.

Optionally, as one embodiment, request message carries the first information list for the adjacent terminals that first terminal detects, response message carries the second information list of the adjacent terminals that second terminal detects, after the response message for receiving second terminal transmission, further include: determine the running time-frequency resource and D2D mark in the existing D2D list of AP, whether occupied by the terminal in first information list and the second information list, wherein, the existing D2D list of AP includes the occupied running time-frequency resource of terminal and D2D mark that D2D communication connection has been established;When the running time-frequency resource and D2D mark in the existing D2D list of AP, when all being occupied by the terminal in first information list and the second information list, for first terminal and second terminal distribution in the existing D2D list of AP running time-frequency resource and D2D identify different the first running time-frequency resource and the first D2D and identify;It is first terminal and second terminal when partially being occupied by the terminal in first information list and the second information list when the running time-frequency resource and D2D mark in the existing D2D list of AP Distribute the running time-frequency resource not occupied by the terminal in first information list and the second information list in the existing D2D list of AP and D2D mark identified as the first running time-frequency resource and the first D2D, or for first terminal and second terminal distribution in the existing D2D list of AP running time-frequency resource and D2D identify different the first running time-frequency resource and the first D2D and identify;When the running time-frequency resource and D2D mark in the existing D2D list of AP, when not occupied by the terminal in first information list and the second information list, for first terminal and second terminal distribution in the existing D2D list of AP running time-frequency resource and D2D identify identical or different the first running time-frequency resource and the first D2D and identify.

Specifically, first information list and the second information list are respectively the neighbor list information of STA1 and STA2, its information for recording the website adjacent with STA1 and STA2 respectively, if any website carries out D2D communication using identical running time-frequency resource in STA1 or STA2 and first information list and the second information list, larger interference can be all caused.

Locally existing D2D list may include D2D connection having been established, and do not discharge the information of the terminal of the D2D communication pair of connection, the D2D mark of occupancy and corresponding running time-frequency resource also to AP.

Whether the STA in the local existing D2D list of AP detection is in the adjacent terminals list (first information list and the second information list) that STA1 and STA2 are reported, it is also to determine in the existing D2D list of AP which D2D mark and corresponding running time-frequency resource occupied by the terminal in first information list and the second information list, so as to ensure that occupied D2D mark and running time-frequency resource have been not assigned to STA1 and STA2 to cause D2D Communication Jamming for these.

As a preferred embodiment, for in AP locally existing D2D list, not by the occupied D2D mark of terminal and running time-frequency resource in first information list and the second information list, STA1 and STA2 can preferentially be distributed to, so as to improve frequency spectrum resource utilization rate, so that throughput of system is promoted.

Optionally, as one embodiment, access point AP determination is established after the D2D communication link between first terminal and second terminal, further includes: sends D2D link establishment confirmation message to first terminal and second terminal respectively, wherein, D2D link establishment confirmation message is identified including the first D2D.

It should be understood that, the D2D link between STA1 and STA2 is established in AP confirmation, and after completing D2D mark and time-frequency resource allocating, it can be by D2D identification notification to STA1 and STA2, it, being capable of D2D mark in match cognization radio frames so that STA1 and STA2 is when receiving the radio frames for being used to indicate D2D transfer resource location information.

Optionally, as one embodiment, method further include: the D2D link for receiving first terminal or second terminal transmission releases request;D2D link, which is sent, to first terminal and second terminal releases message.

The releasing of D2D link can be initiated by terminal side.When the one party (STA1 or STA2) of D2D link is not desired to receive D2D data again, which can initiate D2D link and release request.AP after receiving the request, sends D2D link to STA1 and STA2 and releases message, inform the D2D link failure between STA1 and STA2, discharges corresponding running time-frequency resource and D2D mark.Correspondingly, AP can delete the relevant information of the D2D link of STA1 and STA2 in its local D2D list.

Optionally, as one embodiment, method further include: when AP determine first terminal or second terminal disconnected with AP or D2D link between first terminal and second terminal in the presence of it is long reach threshold value when, send D2D link to first terminal and second terminal and release message.

It should be understood that the releasing of D2D link can also be initiated by the side AP.When a side (STA1 or STA2) for AP discovery D2D communication has left, current BSS is perhaps disconnected with current AP or when D2D link has reached threshold value (maximum duration) there are duration, AP can initiate the releasing of D2D link.

The embodiment of the present invention generates the radio frames for carrying resource allocation information and D2D mark by access point AP, wherein resource allocation information is used to indicate the first running time-frequency resource for D2D communication that AP is first terminal and second terminal is distributed, D2D mark is used to indicate the first D2D mark that AP is first terminal and second terminal is distributed, AP sends radio frames to first terminal and second terminal, so that first terminal and second terminal negotiate code modulation mode by the first running time-frequency resource and carry out D2D communication, so as to reduce the expense of the resource instruction for D2D transmission, improve system throughput.And, since the instruction of D2D resource does not include the information based on D2D terminal such as modulation system, coded format, empty time stream number, specifically modulation system, coded format etc. can voluntarily be negotiated to determine after D2D connection foundation by D2D communication terminal, so as to save the resource overhead of D2D resource distribution instruction, and it can be improved D2D terminal and read the speed of D2D map field (D2D resource impact information), to improve the speed of D2D connection foundation.In addition, preferential multiplexing has been used the running time-frequency resource that will not still interfere when distributing D2D resource, frequency spectrum resource utilization rate can be improved significantly, so that throughput of system is promoted.

Fig. 2 is the flow chart of the method for the resource instruction of one embodiment of the invention.

201, first terminal receives the radio frames for carrying resource allocation information and D2D mark that access point AP is sent, wherein resource allocation information is used to indicate the first running time-frequency resource for D2D communication that AP is first terminal and second terminal is distributed, and D2D mark is used to indicate the first D2D mark that AP is first terminal and second terminal is distributed.

202, first terminal negotiates code modulation mode by the first running time-frequency resource and second terminal.

203, first terminal carries out D2D according to code modulation mode, by running time-frequency resource and second terminal Communication.

The embodiment of the present invention generates the radio frames for carrying resource allocation information and D2D mark by access point AP, wherein resource allocation information is used to indicate the first running time-frequency resource for D2D communication that AP is first terminal and second terminal is distributed, D2D mark is used to indicate the first D2D mark that AP is first terminal and second terminal is distributed, AP sends radio frames to first terminal and second terminal, so that first terminal and second terminal negotiate code modulation mode by the first running time-frequency resource and carry out D2D communication, so as to reduce the expense of the resource instruction for D2D transmission, improve system throughput.

Optionally, as one embodiment, radio frames include D2D configuration field and D2D map field, D2D configuration field is used to indicate the location information that radio frames include D2D map field and D2D map field, D2D map field includes the location information and the first D2D mark of the first running time-frequency resource, wherein the first running time-frequency resource is located at the subsequent upstream frame of radio frames.

Specifically, the radio frames of wlan system are mainly made of legacy preamble part, non-traditional leading part, sub-frame of uplink and downlink subframe.Wherein legacy preamble part can be made of tri- fields of L-STF, L-LTF and L-SIG, and non-traditional leading part can be made of non-traditional signaling field, non-traditional short training field and non-traditional long training field.In the embodiment of the present invention, D2D configuration field and D2D map field can be carried by above-mentioned non-traditional signaling field.It should be understood that the specific name and structure of non-traditional leading part can be determined that the present invention does not limit this by Wi-Fi protocol version.

D2D configuration field can specifically include two subfields, be respectively intended to indicate in the radio frames with the presence or absence of the location information of D2D map field and D2D map field in radio frames.Such as, such as, first bit of D2D configuration field can be used to refer in the radio frames with the presence or absence of D2D map field, as a specific example, first bit of D2D configuration field can be set as to " 1 " indicates that being set as " 0 " in the radio frames there are D2D map field indicates that there is no D2D map fields in the radio frames;Subsequent multiple bits of D2D configuration field can be used to refer to location information of the D2D map field in radio frames, and the specific location of D2D map field can specifically be explicitly indicated by the position and offset of initial bits position of the instruction D2D map field in radio frames.

D2D map field may include one or more in resource allocation information, D2D mark and D2D power control information.But the information based on D2D terminal such as modulation system, coded format, empty time stream number are not included.Specifically, resource allocation information can be by subframe index (SF index) bit, starting resource block (Start RB) bit and offset (offset) bit composition.Wherein subframe index bit, which is used to indicate, distributes to the running time-frequency resource of D2D transmission and is located at which subframe of radio frames, starting resource block bit be used to indicate distribute to the running time-frequency resource that D2D is transmitted initial position be located at the subframe which Resource block, offset bit are used to indicate the running time-frequency resource for distributing to D2D transmission in temporal duration and in the bandwidth information of frequency domain.

Radio frames in the present embodiment are uplink and downlink concatenated sub frames structure, that is to say, that the running time-frequency resource that D2D transmission is distributed to indicated by D2D map field is located in sub-frame of uplink.

Optionally, it is located at the non-traditional signaling field after the legacy preamble field of radio frames as one embodiment, D2D configuration field and D2D map field.

D2D configuration field and D2D map field can be carried by non-traditional signaling field, more specifically, can be carried by the first part (HEW-SIG A) of its non-traditional signaling field and second part (HEW-SIG B) by taking 802.11ax as an example.It should be understood that, for 802.11ax lead code, its non-traditional field can be with high efficiency WLAN (HEW, High Efficiency WLAN), or high efficiency (HE, High Efficiency) name, i.e. non-traditional field portions include, high efficiency WLAN signaling (HEW-SIG) field, high efficiency WLAN Short Training (HEW-STF) field and long training (HEW-LTF) field of high efficiency WLAN, or high efficiency signaling (HE-SIG) field, high efficiency Short Training (HE-STF) field and long training (HE-LTF) field of high efficiency.The present invention does not limit the name of the non-traditional field of 802.11ax lead code, for the convenience of description, following embodiment is mainly illustrated by taking HEW-SIG as an example.

Optionally, as one embodiment, which is characterized in that D2D configuration field is located at the HEW-SIG part A of non-traditional signaling field or the HEW-SIG part B of non-traditional signaling field, and D2D map field is located at the HEW-SIG part B of non-traditional signaling field.

In one embodiment, D2D configuration field can be located at HEW-SIG part A, and D2D map field can be located at HEW-SIG part B.

In another embodiment, D2D configuration field and D2D map field position can be all located at HEW-SIG part B.

Optionally, as one embodiment, D2D configuration field is located at the non-traditional signaling field of radio frames or the data portion of radio frames, and D2D map field is located at the data portion of radio frames.Specifically, under the scene for establishing uplink by the way of trigger frame, D2D configuration field can be located at the non-traditional signaling field or data portion of radio frames, and D2D map field can be located at the data portion of radio frames.Analogously with above-described embodiment, D2D configuration field be used to indicate trigger frame whether include D2D map field and D2D map field location information, D2D map field is used to indicate the position for distributing to the running time-frequency resource of D2D transmission and D2D mark, and wherein running time-frequency resource indicated by D2D map field is located at the subsequent uplink frame of trigger frame.Similarly, D2D map field may include resource allocation information, It is one or more in D2D mark and D2D power control information.But the information based on D2D terminal such as modulation system, coded format, empty time stream number are not included.

Optionally, as one embodiment, radio frames include map field, map field is located at the HEW-SIG part B of radio frames or the data portion of radio frames, at least one bit of the starting of map field is D2D map field for identity map field, D2D map field includes the location information and the first D2D mark of the first running time-frequency resource, wherein the first running time-frequency resource is located at the subsequent upstream frame of radio frames.

Specifically, radio frames can also only include D2D map field, and not include D2D configuration field.Wherein D2D map field can be used as a subclass, is identified by one or more bits that field originates.As an example, being specifically identified method can be as shown in above-mentioned table one.When receiving end reads identification bit, it can then identify the map field specifically subclass, such as when D2D equipment reads " 10 " identification bit, then it is confirmed as D2D map field, it can continue the specific location that reading subsequent bits know the D2D resource of distribution, if D2D equipment reads " 00 " identification bit, discarding can choose.It should be understood that illustrating for convenience, table one is only an example, and the mode of being specifically identified is not limited to this.

Optionally, as one embodiment, D2D map field only includes resource allocation information and D2D mark.But the information based on D2D terminal such as modulation system, coded format, empty time stream number are not included, specifically modulation system, coded format etc. can voluntarily be negotiated to determine after D2D connection foundation by D2D communication terminal, so as to save the resource overhead of D2D resource distribution instruction, and it can be improved D2D terminal and read the speed of D2D map field (D2D resource impact information), to improve the speed of D2D connection foundation.

Optionally, as one embodiment, D2D map field only includes resource allocation information, D2D mark and D2D power control information.But the information based on D2D terminal such as modulation system, coded format, empty time stream number are not included, specifically modulation system, coded format etc. can voluntarily be negotiated to determine after D2D connection foundation by D2D communication terminal, so as to save the resource overhead of D2D resource distribution instruction, and it can be improved D2D terminal and read the speed of D2D map field (D2D resource impact information), to improve the speed of D2D connection foundation.

Optionally, as one embodiment, first terminal receives before the radio frames that access point AP is sent, further include: the request message for requesting the D2D communication link established between second terminal is sent to AP, so that AP sends request message to second terminal, and the response message that second terminal is sent according to request message is received, response message is used to indicate second terminal and agrees to establish D2D communication link with first terminal.

First terminal (STA1) is needing to carry out D2D communication with second terminal (STA2), and When STA1 detects that STA2 meets condition (distance, the signal quality etc.) for carrying out D2D communication with it, then STA1 can send the request message that D2D link is established with STA2 to AP, which may include STA1 in the metrical information (lists of such as adjacent terminals) of D2D discovery phase.After AP receives the D2D request for building link message of STA1 transmission, the request message that STA1 and STA2 establishes D2D link is sent to D2D targeted sites STA2.

STA2 is after receiving the request message, it is determined whether agrees to establish D2D link with STA1, and replys response message.Specifically, if STA2 agrees to and STA1 establishes D2D link, then the response message may include STA2 in the metrical information (such as adjacent terminals list) of D2D discovery phase, otherwise not include STA2 in the metrical information (such as adjacent terminals list) of D2D discovery phase.

AP judges whether STA2 agrees to establish D2D communication link with STA1 after receiving the response message of STA2.If it is determined that STA2 is disagreed, then AP replys D2D link establishment response to STA1 to refuse the D2D link request of STA1.If it is determined that STA1 agrees to, then whether AP checks STA of the AP locally in existing D2D list in the adjacent terminals list that STA1 and STA2 are reported according to the metrical information (such as adjacent terminals list) of STA1 and STA2.

Optionally, as one embodiment, request message carries the first information list for the adjacent terminals that first terminal detects, response message carries the second information list of the adjacent terminals that second terminal detects, in order to the existing D2D list of AP list, the second information list and AP according to the first information, the first running time-frequency resource and the first D2D mark for first terminal and second terminal distribution for D2D communication, wherein, the existing D2D list of AP includes the occupied running time-frequency resource of terminal and D2D mark that D2D communication connection has been established.

Specifically, first information list and the second information list are respectively the neighbor list information of STA1 and STA2, its information for recording the website adjacent with STA1 and STA2 respectively, if any website carries out D2D communication using identical running time-frequency resource in STA1 or STA2 and first information list and the second information list, larger interference can be all caused.

Locally existing D2D list may include D2D connection having been established, and do not discharge the information of the terminal of the D2D communication pair of connection, the D2D mark of occupancy and corresponding running time-frequency resource also to AP.

Whether the STA in the local existing D2D list of AP detection is in the adjacent terminals list (first information list and the second information list) that STA1 and STA2 are reported, it is also to determine in the existing D2D list of AP which D2D mark and corresponding running time-frequency resource occupied by the terminal in first information list and the second information list, so as to ensure that occupied D2D mark and running time-frequency resource have been not assigned to STA1 and STA2 to cause D2D Communication Jamming for these.

As a preferred embodiment, for in AP locally existing D2D list, not by the occupied D2D mark of terminal and running time-frequency resource in first information list and the second information list, STA1 and STA2 can preferentially be distributed to, so as to improve frequency spectrum resource utilization rate, so that throughput of system is promoted.

Optionally, as one embodiment, first terminal is received before the radio frames that access point AP is sent, further includes: receives the D2D link establishment confirmation message that AP is sent, wherein D2D link establishment confirmation message carries the first D2D mark.It should be understood that, the D2D link between STA1 and STA2 is established in AP confirmation, and after completing D2D mark and time-frequency resource allocating, it can be by D2D identification notification to STA1 and STA2, it, being capable of D2D mark in match cognization radio frames so that STA1 and STA2 is when receiving the radio frames for being used to indicate D2D transfer resource location information.

The embodiment of the present invention generates the radio frames for carrying resource allocation information and D2D mark by access point AP, wherein resource allocation information is used to indicate the first running time-frequency resource for D2D communication that AP is first terminal and second terminal is distributed, D2D mark is used to indicate the first D2D mark that AP is first terminal and second terminal is distributed, AP sends radio frames to first terminal and second terminal, so that first terminal and second terminal negotiate code modulation mode by the first running time-frequency resource and carry out D2D communication, so as to reduce the expense of the resource instruction for D2D transmission, improve system throughput.And, since the instruction of D2D resource does not include the information based on D2D terminal such as modulation system, coded format, empty time stream number, specifically modulation system, coded format etc. can voluntarily be negotiated to determine after D2D connection foundation by D2D communication terminal, so as to save the resource overhead of D2D resource distribution instruction, and it can be improved D2D terminal and read the speed of D2D map field (D2D resource impact information), to improve the speed of D2D connection foundation.In addition, preferential multiplexing has been used the running time-frequency resource that will not still interfere when distributing D2D resource, frequency spectrum resource utilization rate can be improved significantly, so that throughput of system is promoted.

Fig. 3 is the structure chart of the radio frames of one embodiment of the invention.

As shown in figure 3, radio frames are mainly made of legacy preamble part, non-traditional leading part, sub-frame of uplink and downlink subframe.Wherein, D2D configuration field is located at the HEW-SIG A field of non-traditional leading part;D2D map field is located at the HEW-SIG B field of non-traditional leading part.

D2D configuration field can specifically include two subfields, be respectively intended to indicate in the radio frames location information with the presence or absence of D2D map field and D2D map field.

D2D map field may include resource allocation information, D2D mark and D2D power control information, and wherein D2D power control information is optional.Specifically, resource allocation information can be by subframe index (SF Index) bit, starting resource block (Start RB) bit and offset (offset) bit composition.Wherein subframe index bit, which is used to indicate, distributes to which subframe that the running time-frequency resource that D2D is transmitted is located at radio frames, starting resource block bit, which is used to indicate, to be distributed to the initial position of the running time-frequency resource of D2D transmission and is located at which resource block of the subframe, and offset bit, which is used to indicate, distributes to running time-frequency resource that D2D is transmitted in temporal duration and in the bandwidth information of frequency domain.

Fig. 4 is the structure chart of the radio frames of another embodiment of the present invention.

As shown in figure 4, radio frames are mainly made of legacy preamble part, non-traditional leading part, sub-frame of uplink and downlink subframe.Wherein, D2D configuration field and D2D map field are all located at the HEW-SIG B field of non-traditional leading part.The specific format of field is referred to above-mentioned Fig. 3, and details are not described herein again.

Fig. 5 is the structure chart of the radio frames of another embodiment of the present invention.

As shown in Figure 5, the data portion (trigger frame) and above-described embodiment that D2D configuration field and D2D map field are located at radio frames are analogously, D2D configuration field be used to indicate trigger frame whether include D2D map field and D2D map field location information, D2D map field is used to indicate the position for distributing to the running time-frequency resource of D2D transmission and D2D mark, and wherein running time-frequency resource indicated by D2D map field is located at the subsequent uplink frame of trigger frame.

Fig. 6 is the flow chart of the D2D link establishment of one embodiment of the invention.

S601, first terminal send request message to access point AP.

First terminal (STA1) is needing to carry out D2D communication with second terminal (STA2), and when STA1 detects that STA2 meets condition (distance, the signal quality etc.) for carrying out D2D communication with it, then STA1 can send the request message that D2D link is established with STA2 to AP, which may include STA1 in the metrical information (lists of such as adjacent terminals) of D2D discovery phase.

After AP receives the D2D request for building link message of STA1 transmission, the request message that STA1 and STA2 establishes D2D link is sent to D2D targeted sites STA2.

S602, second terminal send response message to AP.

STA2 is after receiving the request message, it is determined whether agrees to establish D2D link with STA1, and replys response message.Specifically, if STA2 agrees to and STA1 establishes D2D link, then the response message may include STA2 in the metrical information (such as adjacent terminals list) of D2D discovery phase, otherwise not include STA2 in the metrical information (such as adjacent terminals list) of D2D discovery phase.

AP judges whether STA2 agrees to establish D2D communication link with STA1 after receiving the response message of STA2.If it is determined that STA2 is disagreed, then AP replys D2D link establishment response to STA1 to refuse the D2D link request of STA1.If it is determined that STA1 agreement is then transferred to S603.

S603 determines running time-frequency resource and D2D mark in the existing D2D list of AP, if occupied by the terminal in first information list and the second information list.

The existing D2D list of AP includes the occupied running time-frequency resource of terminal and D2D mark that D2D communication connection has been established.

Judging result can be divided into following three kinds of situations:

1) running time-frequency resource in the existing D2D list of AP and D2D mark, are all occupied by the terminal in first information list and the second information list;

2) running time-frequency resource in the existing D2D list of AP and D2D mark, are partially occupied by the terminal in first information list and the second information list;

3) running time-frequency resource in the existing D2D list of AP and D2D mark, are not occupied by the terminal in first information list and the second information list.

S604, AP are that STA1 and STA2 distributes running time-frequency resource and D2D mark.

AP is determined as the strategy of STA1 and STA2 distribution running time-frequency resource and D2D mark, is specifically as follows according to the judging result of step S603:

1) when the running time-frequency resource and D2D mark in the existing D2D list of AP, when all being occupied by the terminal in first information list and the second information list, for first terminal and second terminal distribution in the existing D2D list of AP running time-frequency resource and D2D identify different the first running time-frequency resource and the first D2D and identify;

2) when the running time-frequency resource and D2D mark in the existing D2D list of AP, when part is occupied by the terminal in first information list and the second information list, distribute the running time-frequency resource not occupied by the terminal in first information list and the second information list in the existing D2D list of AP for first terminal and second terminal and D2D mark identified as the first running time-frequency resource and the first D2D, or for first terminal and second terminal distribution in the existing D2D list of AP running time-frequency resource and D2D identify different the first running time-frequency resource and the first D2D and identify;

3) when the running time-frequency resource and D2D mark in the existing D2D list of AP, when not occupied by the terminal in first information list and the second information list, for first terminal and second terminal distribution in the existing D2D list of AP running time-frequency resource and D2D identify identical or different the first running time-frequency resource and the first D2D and identify.

S605 sends D2D link establishment confirmation message to first terminal and second terminal respectively.

D2D link between STA1 and STA2 is established in AP confirmation, and after completing D2D mark and time-frequency resource allocating, it can be by D2D identification notification to STA1 and STA2, so that STA1 and STA2 It, being capable of D2D mark in match cognization radio frames when receiving the radio frames for being used to indicate D2D transfer resource location information.

S606, AP send radio frames to first terminal and second terminal.

Radio frames include D2D configuration field and D2D map field, D2D configuration field be used to indicate radio frames whether include D2D map field and D2D map field location information, D2D map field includes the location information and the first D2D mark of the first running time-frequency resource, wherein the first running time-frequency resource is located at the subsequent upstream frame of radio frames.

S607, first terminal and second terminal negotiate code modulation mode by the first running time-frequency resource and carry out D2D communication.

The embodiment of the present invention generates the radio frames for carrying resource allocation information and D2D mark by access point AP, wherein resource allocation information is used to indicate the first running time-frequency resource for D2D communication that AP is first terminal and second terminal is distributed, D2D mark is used to indicate the first D2D mark that AP is first terminal and second terminal is distributed, AP sends radio frames to first terminal and second terminal, so that first terminal and second terminal negotiate code modulation mode by the first running time-frequency resource and carry out D2D communication, so as to reduce the expense of the resource instruction for D2D transmission, improve system throughput.And, since the instruction of D2D resource does not include the information based on D2D terminal such as modulation system, coded format, empty time stream number, specifically modulation system, coded format etc. can voluntarily be negotiated to determine after D2D connection foundation by D2D communication terminal, so as to save the resource overhead of D2D resource distribution instruction, and it can be improved D2D terminal and read the speed of D2D map field (D2D resource impact information), to improve the speed of D2D connection foundation.In addition, preferential multiplexing has been used the running time-frequency resource that will not still interfere when distributing D2D resource, frequency spectrum resource utilization rate can be improved significantly, so that throughput of system is promoted.

Fig. 7 is the flow chart that the D2D link of one embodiment of the invention releases.

The releasing of D2D link can be initiated by terminal side.When the one party (STA1 or STA2) of D2D link is not desired to receive D2D data again, which can initiate D2D link and release request.AP after receiving the request, sends D2D link to STA1 and STA2 and releases message, inform the D2D link failure between STA1 and STA2, discharges corresponding running time-frequency resource and D2D mark.Correspondingly, AP can delete the relevant information of the D2D link of STA1 and STA2 in its local D2D list.

Fig. 8 is the flow chart that the D2D link of another embodiment of the present invention releases.

The releasing of D2D link can also be initiated by the side AP.When AP discovery D2D communication a side (STA1 or STA2) have left current BSS perhaps disconnected with current AP or D2D link in the presence of When length has reached threshold value (maximum duration), AP can initiate the releasing of D2D link.D2D link is sent to STA1 and STA2 and releases message, informs the D2D link failure between STA1 and STA2, discharges corresponding running time-frequency resource and D2D mark.Correspondingly, AP can delete the relevant information of the D2D link of STA1 and STA2 in its local D2D list.

Fig. 9 is the schematic block diagram of the access point of one embodiment of the invention.The access point AP 90 of Fig. 9 includes generation unit 91 and transmission unit 92.

Generation unit 91 generates the radio frames for carrying resource allocation information and D2D mark, wherein resource allocation information is used to indicate the first running time-frequency resource for D2D communication that AP is first terminal and second terminal is distributed, and D2D mark is used to indicate the first D2D mark that AP 90 is first terminal and second terminal is distributed;Transmission unit 92 sends radio frames to first terminal and second terminal, so that first terminal and second terminal carry out D2D communication by the first running time-frequency resource.

The access point AP 90 of the embodiment of the present invention generates the radio frames for carrying resource allocation information and D2D mark, wherein resource allocation information is used to indicate the first running time-frequency resource for D2D communication that AP 90 is first terminal and second terminal is distributed, D2D mark is used to indicate the first D2D mark that AP 90 is first terminal and second terminal is distributed, AP 90 sends radio frames to first terminal and second terminal, so that first terminal and second terminal negotiate code modulation mode by the first running time-frequency resource and carry out D2D communication, so as to reduce the expense of the resource instruction for D2D transmission, improve system throughput.

Optionally, as one embodiment, radio frames include D2D configuration field and D2D map field, D2D configuration field is used to indicate the location information that radio frames include D2D map field and D2D map field, D2D map field includes the location information and the first D2D mark of the first running time-frequency resource, wherein the first running time-frequency resource is located at the subsequent upstream frame of radio frames.

Specifically, the radio frames of wlan system are mainly made of legacy preamble part, non-traditional leading part, sub-frame of uplink and downlink subframe.Wherein legacy preamble part can be made of tri- fields of L-STF, L-LTF and L-SIG, and non-traditional leading part can be made of non-traditional signaling field, non-traditional short training field and non-traditional long training field.In the embodiment of the present invention, D2D configuration field and D2D map field can be carried by above-mentioned non-traditional signaling field.It should be understood that the specific name and structure of non-traditional leading part can be determined that the present invention does not limit this by Wi-Fi protocol version.

D2D configuration field can specifically include two subfields, be respectively intended to indicate in the radio frames location information with the presence or absence of D2D map field and D2D map field.For example, first bit of D2D configuration field can be used to refer in the radio frames with the presence or absence of D2D map field, as a specific example, first bit of D2D configuration field can be set as to " 1 " indicates that this is wireless There are D2D map field in frame, being set as " 0 " indicates that there is no D2D map fields in the radio frames;Subsequent multiple bits of D2D configuration field can be used to refer to the location information of D2D map field, and the specific location of D2D map field can specifically be explicitly indicated by the position and offset of initial bits position of the instruction D2D map field in radio frames.

D2D map field may include one or more in resource allocation information, D2D mark and D2D power control information.But the information based on D2D terminal such as modulation system, coded format, empty time stream number are not included.Specifically, resource allocation information can be by subframe index (SF index) bit, starting resource block (Start RB) bit and offset (offset) bit composition.Wherein subframe index bit, which is used to indicate, distributes to which subframe that the running time-frequency resource that D2D is transmitted is located at radio frames, starting resource block bit, which is used to indicate, to be distributed to the initial position of the running time-frequency resource of D2D transmission and is located at which resource block of the subframe, and offset bit, which is used to indicate, distributes to running time-frequency resource that D2D is transmitted in temporal duration and in the bandwidth information of frequency domain.

Radio frames in the present embodiment are uplink and downlink concatenated sub frames structure, that is to say, that the running time-frequency resource that D2D transmission is distributed to indicated by D2D map field is located in sub-frame of uplink.

Optionally, it is located at the non-traditional signaling field after the legacy preamble field of radio frames as one embodiment, D2D configuration field and D2D map field.

D2D configuration field and D2D map field can be carried by non-traditional signaling field, more specifically, can be carried by the first part (HEW-SIG A) of its non-traditional signaling field and second part (HEW-SIG B) by taking 802.11ax as an example.It should be understood that, for 802.11ax lead code, its non-traditional field can be with high efficiency WLAN (HEW, High Efficiency WLAN), or high efficiency (HE, High Efficiency) name, i.e. non-traditional field portions include, high efficiency WLAN signaling (HEW-SIG) field, high efficiency WLAN Short Training (HEW-STF) field and long training (HEW-LTF) field of high efficiency WLAN, or high efficiency signaling (HE-SIG) field, high efficiency Short Training (HE-STF) field and long training (HE-LTF) field of high efficiency.The present invention does not limit the name of the non-traditional field of 802.11ax lead code, for the convenience of description, following embodiment is mainly illustrated by taking HEW-SIG as an example.

Optionally, as one embodiment, D2D configuration field is located at the HEW-SIG part A of non-traditional signaling field or the HEW-SIG part B of non-traditional signaling field, and D2D map field is located at the HEW-SIG part B of non-traditional signaling field.

In one embodiment, D2D configuration field can be located at HEW-SIG part A, and D2D map field can be located at HEW-SIG part B.

In another embodiment, D2D configuration field and D2D map field position can be all located at HEW-SIG part B.

Optionally, as one embodiment, D2D configuration field is located at the non-traditional signaling field of radio frames or the data portion of radio frames, and D2D map field is located at the data portion of radio frames.Specifically, under the scene for establishing uplink by the way of trigger frame, D2D configuration field can both be located at the non-traditional signaling field of trigger frame, the data portion that can also be located at after trigger frame, and D2D map field can be located at the data portion of radio frames.Analogously with above-described embodiment, D2D configuration field be used to indicate trigger frame whether include D2D map field and D2D map field location information, D2D map field is used to indicate the position for distributing to the running time-frequency resource of D2D transmission and D2D mark, and wherein running time-frequency resource indicated by D2D map field is located at the subsequent uplink frame of trigger frame.Similarly, D2D map field may include one or more in resource allocation information, D2D mark and D2D power control information.But the information based on D2D terminal such as modulation system, coded format, empty time stream number are not included.

Optionally, as one embodiment, radio frames include map field, map field is located at the HEW-SIG part B of radio frames or the data portion of radio frames, at least one bit of the starting of map field is D2D map field for identity map field, D2D map field includes the location information and the first D2D mark of the first running time-frequency resource, wherein the first running time-frequency resource is located at the subsequent upstream frame of radio frames.

Specifically, radio frames can also only include D2D map field, and not include D2D configuration field.Wherein D2D map field can be used as a subclass, is identified by one or more bits that field originates.Specific example is referred to above-mentioned table one, and details are not described herein again.

Optionally, as one embodiment, D2D map field only includes resource allocation information and D2D mark.But the information based on D2D terminal such as modulation system, coded format, empty time stream number are not included, specifically modulation system, coded format etc. can voluntarily be negotiated to determine after D2D connection foundation by D2D communication terminal, so as to save the resource overhead of D2D resource distribution instruction, and it can be improved D2D terminal and read the speed of D2D map field (D2D resource impact information), to improve the speed of D2D connection foundation.

Optionally, as one embodiment, D2D map field only includes resource allocation information, D2D mark and D2D power control information.But the information based on D2D terminal such as modulation system, coded format, empty time stream number are not included, specifically modulation system, coded format etc. can voluntarily be negotiated to determine after D2D connection foundation by D2D communication terminal, so as to save the resource overhead of D2D resource distribution instruction, and it can be improved D2D terminal and read the speed of D2D map field (D2D resource impact information), to improve the speed of D2D connection foundation.

Optionally, as one embodiment, AP 90 further includes receiving unit, and receiving unit is specifically used for: receiving the request message that first terminal is sent, request message is used for the D2D communication link for requesting to establish between second terminal;Request message is sent to second terminal by transmission unit 92;The response message that second terminal is sent is received, response message is used to indicate second terminal and agrees to establish D2D communication link with first terminal.

First terminal (STA1) is needing to carry out D2D communication with second terminal (STA2), and when STA1 detects that STA2 meets condition (distance, the signal quality etc.) for carrying out D2D communication with it, then STA1 can send the request message that D2D link is established with STA2 to AP 90, which may include STA1 in the metrical information (lists of such as adjacent terminals) of D2D discovery phase.After AP 90 receives the D2D request for building link message of STA1 transmission, the request message that STA1 and STA2 establishes D2D link is sent to D2D targeted sites STA2.

STA2 is after receiving the request message, it is determined whether agrees to establish D2D link with STA1, and replys response message.Specifically, if STA2 agrees to and STA1 establishes D2D link, then the response message may include STA2 in the metrical information (such as adjacent terminals list) of D2D discovery phase, otherwise not include STA2 in the metrical information (such as adjacent terminals list) of D2D discovery phase.

AP 90 judges whether STA2 agrees to establish D2D communication link with STA1 after receiving the response message of STA2.If it is determined that STA2 is disagreed, then AP 90 replys D2D link establishment response to STA1 to refuse the D2D link request of STA1.If it is determined that STA1 agrees to, then whether AP 90 checks the STA in the local existing D2D list of AP 90 in the adjacent terminals list that STA1 and STA2 are reported according to the metrical information (such as adjacent terminals list) of STA1 and STA2.

Optionally, as one embodiment, request message carries the first information list for the adjacent terminals that first terminal detects, response message carries the second information list of the adjacent terminals that second terminal detects, AP further includes determination unit, determination unit is used for: determining the running time-frequency resource and D2D mark in the existing D2D list of AP 90, whether occupied by the terminal in first information list and the second information list, wherein, the existing D2D list of AP 90 includes the occupied running time-frequency resource of terminal and D2D mark that D2D communication connection has been established;When the running time-frequency resource and D2D mark in the existing D2D list of AP 90, when all being occupied by the terminal in first information list and the second information list, for first terminal and second terminal distribution in the existing D2D list of AP 90 running time-frequency resource and D2D identify different the first running time-frequency resource and the first D2D and identify;When the running time-frequency resource and D2D mark in the existing D2D list of AP 90, it is that first terminal and second terminal are distributed in the existing D2D list of AP 90 not by first information list and the second information list when part is occupied by the terminal in first information list and the second information list The terminal running time-frequency resource and D2D mark that occupy in one identified as the first running time-frequency resource and the first D2D, or for first terminal and second terminal distribution in the existing D2D list of AP 90 running time-frequency resource and D2D identify different the first running time-frequency resource and the first D2D and identify;When the running time-frequency resource and D2D mark in the existing D2D list of AP 90, when not occupied by the terminal in first information list and the second information list, for first terminal and second terminal distribution in the existing D2D list of AP 90 running time-frequency resource and D2D identify identical or different the first running time-frequency resource and the first D2D and identify.

Specifically, first information list and the second information list are respectively the neighbor list information of STA1 and STA2, its information for recording the website adjacent with STA1 and STA2 respectively, if any website carries out D2D communication using identical running time-frequency resource in STA1 or STA2 and first information list and the second information list, larger interference can be all caused.

The local existing D2D list of AP 90 may include D2D connection having been established, and do not discharge the information of the terminal of the D2D communication pair of connection, the D2D mark of occupancy and corresponding running time-frequency resource also.

AP 90 detects the STA in local existing D2D list whether in the adjacent terminals list (first information list and the second information list) that STA1 and STA2 are reported, it is also to determine in the existing D2D list of AP 90 which D2D mark and corresponding running time-frequency resource occupied by the terminal in first information list and the second information list, so as to ensure that occupied D2D mark and running time-frequency resource have been not assigned to STA1 and STA2 to cause D2D Communication Jamming for these.

As a preferred embodiment, in existing D2D list local for AP 90, not by the occupied D2D mark of terminal and running time-frequency resource in first information list and the second information list, STA1 and STA2 can preferentially be distributed to, so as to improve frequency spectrum resource utilization rate, so that throughput of system is promoted.

Optionally, as one embodiment, transmission unit 92 is also used to: sending D2D link establishment confirmation message to first terminal and second terminal respectively, wherein D2D link establishment confirmation message is identified including the first D2D.It should be understood that, the D2D link established between STA1 and STA2 is confirmed in AP 90, and after completing D2D mark and time-frequency resource allocating, it can be by D2D identification notification to STA1 and STA2, it, being capable of D2D mark in match cognization radio frames so that STA1 and STA2 is when receiving the radio frames for being used to indicate D2D transfer resource location information.

Optionally, as one embodiment, AP 90 further includes receiving unit, and receiving unit is used for: the D2D link for receiving first terminal or second terminal transmission releases request;Transmission unit 92 is also used to, and is sent D2D link to first terminal and second terminal and is released message.

The releasing of D2D link can be initiated by terminal side.When D2D link one party (STA1 or When STA2) being not desired to receive D2D data again, which can initiate D2D link and release request.AP 90 after receiving the request, sends D2D link to STA1 and STA2 and releases message, inform the D2D link failure between STA1 and STA2, discharges corresponding running time-frequency resource and D2D mark.Correspondingly, AP 90 can delete the relevant information of the D2D link of STA1 and STA2 in its local D2D list.

Optionally, as one embodiment, transmission unit 92 is also used to: when AP 90 determine first terminal or second terminal disconnected with AP 90 or D2D link between first terminal and second terminal in the presence of it is long reach threshold value when, send D2D link releasing message to first terminal and second terminal.It should be understood that the releasing of D2D link can also be initiated by 90 side AP.When a side (STA1 or STA2) for the discovery D2D communication of AP 90 has left current BSS or disconnects with current AP 90, or D2D link, when having reached threshold value (maximum duration) there are duration, AP 90 can initiate the releasing of D2D link.

The embodiment of the present invention generates the radio frames for carrying resource allocation information and D2D mark by access point AP 90, wherein resource allocation information is used to indicate the first running time-frequency resource for D2D communication that AP 90 is first terminal and second terminal is distributed, D2D mark is used to indicate the first D2D mark that AP 90 is first terminal and second terminal is distributed, AP 90 sends radio frames to first terminal and second terminal, so that first terminal and second terminal negotiate code modulation mode by the first running time-frequency resource and carry out D2D communication, so as to reduce the expense of the resource instruction for D2D transmission, improve system throughput.And, since the instruction of D2D resource does not include the information based on D2D terminal such as modulation system, coded format, empty time stream number, specifically modulation system, coded format etc. can voluntarily be negotiated to determine after D2D connection foundation by D2D communication terminal, so as to save the resource overhead of D2D resource distribution instruction, and it can be improved D2D terminal and read the speed of D2D map field (D2D resource impact information), to improve the speed of D2D connection foundation.In addition, preferential multiplexing has been used the running time-frequency resource that will not still interfere when distributing D2D resource, frequency spectrum resource utilization rate can be improved significantly, so that throughput of system is promoted.

Figure 10 is the schematic block diagram of the terminal of one embodiment of the invention.The terminal 100 of Figure 10 includes receiving unit 101, negotiation element 102 and communication unit 103.

Receiving unit 101 receives the radio frames for carrying resource allocation information and D2D mark that access point AP is sent, it is the first running time-frequency resource for D2D communication that terminal and second terminal are distributed that wherein resource allocation information, which is used to indicate AP, and it is the first D2D mark that terminal and second terminal are distributed that D2D mark, which is used to indicate AP,;Negotiation element 102 negotiates code modulation mode by the first running time-frequency resource and second terminal;Communication unit 103 carries out D2D communication according to code modulation mode, by running time-frequency resource and second terminal.

Wherein, terminal 100 can be the first terminal that D2D communication connection is established with second terminal.

The embodiment of the present invention generates the radio frames for carrying resource allocation information and D2D mark by access point AP, wherein resource allocation information is used to indicate the first running time-frequency resource for D2D communication that AP is first terminal and second terminal is distributed, D2D mark is used to indicate the first D2D mark that AP is first terminal and second terminal is distributed, AP sends radio frames to first terminal and second terminal, so that first terminal and second terminal negotiate code modulation mode by the first running time-frequency resource and carry out D2D communication, so as to reduce the expense of the resource instruction for D2D transmission, improve system throughput.

Optionally, as one embodiment, radio frames include D2D configuration field and D2D map field, D2D configuration field is used to indicate the location information that radio frames include D2D map field and D2D map field, D2D map field includes the location information and the first D2D mark of the first running time-frequency resource, wherein the first running time-frequency resource is located at the subsequent upstream frame of radio frames.

Specifically, the radio frames of wlan system are mainly made of legacy preamble part, non-traditional leading part, sub-frame of uplink and downlink subframe.Wherein legacy preamble part can be made of tri- fields of L-STF, L-LTF and L-SIG, and non-traditional leading part can be made of non-traditional signaling field, non-traditional short training field and non-traditional long training field.In the embodiment of the present invention, D2D configuration field and D2D map field can be carried by above-mentioned non-traditional signaling field.It should be understood that the specific name and structure of non-traditional leading part can be determined that the present invention does not limit this by Wi-Fi protocol version.

D2D configuration field can specifically include two subfields, be respectively intended to indicate in the radio frames location information with the presence or absence of D2D map field and D2D map field.Such as, such as, first bit of D2D configuration field can be used to refer in the radio frames with the presence or absence of D2D map field, as a specific example, first bit of D2D configuration field can be set as to " 1 " indicates that being set as " 0 " in the radio frames there are D2D map field indicates that there is no D2D map fields in the radio frames;Subsequent multiple bits of D2D configuration field can be used to refer to the location information of D2D map field, and the specific location of D2D map field can specifically be explicitly indicated by the position and offset of initial bits position of the instruction D2D map field in radio frames.

D2D map field may include one or more in resource allocation information, D2D mark and D2D power control information.But the information based on D2D terminal such as modulation system, coded format, empty time stream number are not included.Specifically, resource allocation information can be by subframe index (SF index) bit, starting resource block (Start RB) bit and offset (offset) bit composition.Wherein subframe index bit, which is used to indicate, distributes to the running time-frequency resource of D2D transmission and is located at which subframe of radio frames, starting resource block bit be used to indicate distribute to the running time-frequency resource that D2D is transmitted initial position be located at the subframe which Resource block, offset bit are used to indicate the running time-frequency resource for distributing to D2D transmission in temporal duration and in the bandwidth information of frequency domain.

Radio frames in the present embodiment are uplink and downlink concatenated sub frames structure, that is to say, that the running time-frequency resource that D2D transmission is distributed to indicated by D2D map field is located in sub-frame of uplink.

Optionally, it is located at the non-traditional signaling field after the legacy preamble field of radio frames as one embodiment, D2D configuration field and D2D map field.D2D configuration field and D2D map field can be carried by non-traditional signaling field, more specifically, can be carried by the first part (HEW-SIG A) of its non-traditional signaling field and second part (HEW-SIG B) by taking 802.11ax as an example.It should be understood that, for 802.11ax lead code, its non-traditional field can be with high efficiency WLAN (HEW, High Efficiency WLAN), or high efficiency (HE, High Efficiency) name, i.e. non-traditional field portions include, high efficiency WLAN signaling (HEW-SIG) field, high efficiency WLAN Short Training (HEW-STF) field and long training (HEW-LTF) field of high efficiency WLAN, or high efficiency signaling (HE-SIG) field, high efficiency Short Training (HE-STF) field and long training (HE-LTF) field of high efficiency.The present invention does not limit the name of the non-traditional field of 802.11ax lead code, for the convenience of description, following embodiment is mainly illustrated by taking HEW-SIG as an example.

Optionally, as one embodiment, D2D configuration field is located at the HEW-SIG part A of non-traditional signaling field or the HEW-SIG part B of non-traditional signaling field, and D2D map field is located at the HEW-SIG part B of non-traditional signaling field.

In one embodiment, D2D configuration field can be located at HEW-SIG part A, and D2D map field can be located at HEW-SIG part B.

In another embodiment, D2D configuration field and D2D map field position can be all located at HEW-SIG part B.

Optionally, as one embodiment, D2D configuration field is located at the non-traditional signaling field of radio frames or the data portion of radio frames, and D2D map field is located at the data portion of radio frames.

Specifically, under the scene for establishing uplink by the way of trigger frame, D2D configuration field can be located at the non-traditional signaling field or data portion of radio frames, and D2D map field can be located at the data portion of radio frames.Analogously with above-described embodiment, D2D configuration field be used to indicate trigger frame whether include D2D map field and D2D map field location information, D2D map field is used to indicate the position for distributing to the running time-frequency resource of D2D transmission and D2D mark, and wherein running time-frequency resource indicated by D2D map field is located at the subsequent uplink frame of trigger frame.Similarly, D2D map field may include one or more in resource allocation information, D2D mark and D2D power control information.But does not include and adjust The information based on D2D terminal such as mode processed, coded format, empty time stream number.

Optionally, as one embodiment, radio frames include map field, map field is located at the HEW-SIG part B of radio frames or the data portion of radio frames, at least one bit of the starting of map field is D2D map field for identity map field, D2D map field includes the location information and the first D2D mark of the first running time-frequency resource, wherein the first running time-frequency resource is located at the subsequent upstream frame of radio frames.

Specifically, radio frames can also only include D2D map field, and not include D2D configuration field.Wherein D2D map field can be used as a subclass, is identified by one or more bits that field originates.As an example, being specifically identified method can be as shown in above-mentioned table one.When receiving end reads identification bit, it can then identify the map field specifically subclass, such as when D2D equipment reads " 10 " identification bit, then it is confirmed as D2D map field, it can continue the specific location that reading subsequent bits know the D2D resource of distribution, if D2D equipment reads " 00 " identification bit, discarding can choose.It should be understood that illustrating for convenience, table one is only an example, and the mode of being specifically identified is not limited to this.

Optionally, as one embodiment, D2D map field only includes resource allocation information and D2D mark.But the information based on D2D terminal such as modulation system, coded format, empty time stream number are not included, specifically modulation system, coded format etc. can voluntarily be negotiated to determine after D2D connection foundation by D2D communication terminal, so as to save the resource overhead of D2D resource distribution instruction, and it can be improved D2D terminal and read the speed of D2D map field (D2D resource impact information), to improve the speed of D2D connection foundation.

Optionally, as one embodiment, D2D map field only includes resource allocation information, D2D mark and D2D power control information.But the information based on D2D terminal such as modulation system, coded format, empty time stream number are not included, specifically modulation system, coded format etc. can voluntarily be negotiated to determine after D2D connection foundation by D2D communication terminal, so as to save the resource overhead of D2D resource distribution instruction, and it can be improved D2D terminal and read the speed of D2D map field (D2D resource impact information), to improve the speed of D2D connection foundation.

Optionally, as one embodiment, communication unit 103 is also used to: sending the request message for requesting the D2D communication link established between second terminal to AP, so that AP sends request message to second terminal, and the response message that second terminal is sent according to request message is received, response message is used to indicate second terminal and agrees to establish D2D communication link with first terminal.

First terminal 101 (STA1) is needing to carry out D2D communication with second terminal (STA2), and when STA1 detects that STA2 meets condition (distance, the signal quality etc.) for carrying out D2D communication with it, then STA1 can send the request message that D2D link is established with STA2 to AP, which disappears Breath may include STA1 in the metrical information (lists of such as adjacent terminals) of D2D discovery phase.After AP receives the D2D request for building link message of STA1 transmission, the request message that STA1 and STA2 establishes D2D link is sent to D2D targeted sites STA2.

STA2 is after receiving the request message, it is determined whether agrees to establish D2D link with STA1, and replys response message.Specifically, if STA2 agrees to and STA1 establishes D2D link, then the response message may include STA2 in the metrical information (such as adjacent terminals list) of D2D discovery phase, otherwise not include STA2 in the metrical information (such as adjacent terminals list) of D2D discovery phase.

AP judges whether STA2 agrees to establish D2D communication link with STA1 after receiving the response message of STA2.If it is determined that STA2 is disagreed, then AP replys D2D link establishment response to STA1 to refuse the D2D link request of STA1.If it is determined that STA1 agrees to, then whether AP checks STA of the AP locally in existing D2D list in the adjacent terminals list that STA1 and STA2 are reported according to the metrical information (such as adjacent terminals list) of STA1 and STA2.

Optionally, as one embodiment, request message carries the first information list for the adjacent terminals that terminal detects, response message carries the second information list of the adjacent terminals that second terminal detects, in order to the existing D2D list of AP list, the second information list and AP according to the first information, the first running time-frequency resource and the first D2D mark for terminal and second terminal distribution for D2D communication, wherein, the existing D2D list of AP includes the occupied running time-frequency resource of terminal and D2D mark that D2D communication connection has been established.

Specifically, first information list and the second information list are respectively the neighbor list information of STA1 and STA2, its information for recording the website adjacent with STA1 and STA2 respectively, if any website carries out D2D communication using identical running time-frequency resource in STA1 or STA2 and first information list and the second information list, larger interference can be all caused.

Locally existing D2D list may include D2D connection having been established, and do not discharge the information of the terminal of the D2D communication pair of connection, the D2D mark of occupancy and corresponding running time-frequency resource also to AP.

Whether the STA in the local existing D2D list of AP detection is in the adjacent terminals list (first information list and the second information list) that STA1 and STA2 are reported, it is also to determine in the existing D2D list of AP which D2D mark and corresponding running time-frequency resource occupied by the terminal in first information list and the second information list, so as to ensure that occupied D2D mark and running time-frequency resource have been not assigned to STA1 and STA2 to cause D2D Communication Jamming for these.

It,, can be preferential not by the occupied D2D mark of terminal and running time-frequency resource in first information list and the second information list in AP locally existing D2D list as a preferred embodiment STA1 and STA2 are distributed to, so as to improve frequency spectrum resource utilization rate, so that throughput of system is promoted.

Optionally, as one embodiment, communication unit 103 is also used to: receiving the D2D link establishment confirmation message that AP is sent, wherein D2D link establishment confirmation message carries the first D2D mark.

It should be understood that, the D2D link between STA1 and STA2 is established in AP confirmation, and after completing D2D mark and time-frequency resource allocating, it can be by D2D identification notification to STA1 and STA2, it, being capable of D2D mark in match cognization radio frames so that STA1 and STA2 is when receiving the radio frames for being used to indicate D2D transfer resource location information.

The embodiment of the present invention generates the radio frames for carrying resource allocation information and D2D mark by access point AP, wherein resource allocation information is used to indicate the first running time-frequency resource for D2D communication that AP is first terminal and second terminal is distributed, D2D mark is used to indicate the first D2D mark that AP is first terminal and second terminal is distributed, AP sends radio frames to first terminal and second terminal, so that first terminal and second terminal negotiate code modulation mode by the first running time-frequency resource and carry out D2D communication, so as to reduce the expense of the resource instruction for D2D transmission, improve system throughput.And, since the instruction of D2D resource does not include the information based on D2D terminal such as modulation system, coded format, empty time stream number, specifically modulation system, coded format etc. can voluntarily be negotiated to determine after D2D connection foundation by D2D communication terminal, so as to save the resource overhead of D2D resource distribution instruction, and it can be improved D2D terminal and read the speed of D2D map field (D2D resource impact information), to improve the speed of D2D connection foundation.In addition, preferential multiplexing has been used the running time-frequency resource that will not still interfere when distributing D2D resource, frequency spectrum resource utilization rate can be improved significantly, so that throughput of system is promoted.

Figure 11 is the schematic block diagram of the access point of another embodiment of the present invention.The access point AP 110 of Figure 11 includes processor 111 and memory 112.Processor 111 is connected with memory 112 by bus system 113.

Memory 112 is used to store so that processor 111 executes the instruction operated below: generating the radio frames for carrying resource allocation information and D2D mark, wherein resource allocation information is used to indicate the first running time-frequency resource for D2D communication that AP is first terminal and second terminal is distributed, and D2D mark is used to indicate the first D2D mark that AP is first terminal and second terminal is distributed.Radio frames are sent to first terminal and second terminal, so that first terminal and second terminal carry out D2D communication by the first running time-frequency resource.

The embodiment of the present invention generates the radio frames for carrying resource allocation information and D2D mark by access point AP 110, and wherein resource allocation information is used to indicate the use that AP is first terminal and second terminal is distributed In the first running time-frequency resource of D2D communication, D2D mark is used to indicate the first D2D mark that AP is first terminal and second terminal is distributed, AP sends radio frames to first terminal and second terminal, so that first terminal and second terminal negotiate code modulation mode by the first running time-frequency resource and carry out D2D communication, so as to reduce the expense of the resource instruction for D2D transmission, improve system throughput.

In addition, AP 110 can also include transmit circuit 114, receive circuit 115 and antenna 116 etc..Processor 111 controls the operation of AP 110, and processor 111 can also be known as CPU (Central Processing Unit, central processing unit).Memory 112 may include read-only memory and random access memory, and provide instruction and data to processor 111.The a part of of memory 112 can also include nonvolatile RAM (NVRAM).In specific application, transmit circuit 114 and reception circuit 115 may be coupled to antenna 116.The various components of AP 110 are coupled by bus system 113, and wherein bus system 113 can also include power bus, control bus and status signal bus in addition etc. in addition to including data/address bus.But for the sake of clear explanation, various buses are all designated as bus system 113 in figure.

The method that the embodiments of the present invention disclose can be applied in processor 111, or be realized by processor 111.Processor 111 may be a kind of IC chip, the processing capacity with signal.During realization, each step of the above method can be completed by the integrated logic circuit of the hardware in processor 111 or the instruction of software form.Above-mentioned processor 111 can be general processor, digital signal processor (DSP), specific integrated circuit (ASIC), ready-made programmable gate array (FPGA) either other programmable logic device, discrete gate or transistor logic, discrete hardware components.It may be implemented or execute disclosed each method, step and the logic diagram in the embodiment of the present invention.General processor can be microprocessor or the processor is also possible to any conventional processor etc..The step of method in conjunction with disclosed in the embodiment of the present invention, can be embodied directly in hardware decoding processor and execute completion, or in decoding processor hardware and software module combination execute completion.Software module can be located at random access memory, flash memory, read-only memory, in the storage medium of this fields such as programmable read only memory or electrically erasable programmable memory, register maturation.The step of storage medium is located at memory 112, and processor 111 reads the information in memory 112, completes the above method in conjunction with its hardware.

Optionally, as one embodiment, radio frames include D2D configuration field and D2D map field, D2D configuration field is used to indicate the location information that radio frames include D2D map field and D2D map field, D2D map field includes the location information and the first D2D mark of the first running time-frequency resource, wherein the first running time-frequency resource is located at the subsequent upstream frame of radio frames.

Optionally, it is located at radio frames as one embodiment, D2D configuration field and D2D map field Legacy preamble field after non-traditional signaling field.

Optionally, as one embodiment, D2D configuration field is located at the HEW-SIG part A of non-traditional signaling field or the HEW-SIG part B of non-traditional signaling field, and D2D map field is located at the HEW-SIG part B of non-traditional signaling field.

Optionally, as one embodiment, D2D configuration field is located at the non-traditional signaling field of radio frames or the data portion of radio frames, and D2D map field is located at the data portion of radio frames.

Optionally, as one embodiment, radio frames include map field, map field is located at the HEW-SIG part B of radio frames or the data portion of radio frames, at least one bit of the starting of map field is D2D map field for identity map field, D2D map field includes the location information and the first D2D mark of the first running time-frequency resource, wherein the first running time-frequency resource is located at the subsequent upstream frame of radio frames.

Optionally, as one embodiment, it generates before carrying the radio frames that resource allocation information and D2D are identified, further includes: receive the request message that first terminal is sent by receiving circuit 115, request message is used to request the D2D communication link between foundation and second terminal;Request message is sent to second terminal by transmit circuit 114;The response message that second terminal is sent is received by receiving circuit 115, response message is used to indicate second terminal and agrees to establish D2D communication link with first terminal.

Optionally, as one embodiment, request message carries the first information list for the adjacent terminals that first terminal detects, response message carries the second information list of the adjacent terminals that second terminal detects, after the response message for receiving the reception second terminal transmission of circuit 115, further includes:

Pass through processor 111, determine the running time-frequency resource and D2D mark in the existing D2D list of AP 110, whether occupied by the terminal in first information list and the second information list, wherein, the existing D2D list of AP 110 includes the occupied running time-frequency resource of terminal and D2D mark that D2D communication connection has been established;

When the running time-frequency resource and D2D mark in the existing D2D list of AP110, when all being occupied by the terminal in first information list and the second information list, processor 111 be first terminal and second terminal distribution in the existing D2D list of AP running time-frequency resource and D2D identify different the first running time-frequency resource and the first D2D and identify;

When the running time-frequency resource and D2D mark in the existing D2D list of AP 110, when part is occupied by the terminal in first information list and the second information list, processor 111 is that distribute in the running time-frequency resource not occupied by the terminal in first information list and the second information list in the existing D2D list of AP 110 and D2D mark one of first terminal and second terminal identifies as the first running time-frequency resource and the first D2D, or for first terminal and second terminal distribution in the existing D2D list of AP 110 running time-frequency resource and D2D identifies different the first running time-frequency resource and the first D2D mark;

When the running time-frequency resource and D2D mark in the existing D2D list of AP 110, when not occupied by the terminal in first information list and the second information list, processor 111 be first terminal and second terminal distribution in the existing D2D list of AP 110 running time-frequency resource and D2D identify identical or different the first running time-frequency resource and the first D2D and identify.

Optionally, as one embodiment, the determination of access point AP 110 is established after the D2D communication link between first terminal and second terminal, further include: pass through transmit circuit 115, D2D link establishment confirmation message is sent to first terminal and second terminal respectively, wherein, D2D link establishment confirmation message is identified including the first D2D.

Optionally, as one embodiment, further includes: by receiving the D2D link releasing request that circuit 115 receives first terminal or second terminal is sent;D2D link, which is sent, to first terminal and second terminal by transmit circuit 114 releases message.

Optionally, as one embodiment, further include: when AP 110 determines that first terminal or second terminal are disconnected with AP, or it is long when reaching threshold value in the presence of the D2D link between first terminal and second terminal, D2D link is sent to first terminal and second terminal by transmit circuit 114 and releases message.

The embodiment of the present invention generates the radio frames for carrying resource allocation information and D2D mark by access point AP 110, wherein resource allocation information is used to indicate the first running time-frequency resource for D2D communication that AP 110 is first terminal and second terminal is distributed, D2D mark is used to indicate the first D2D mark that AP 110 is first terminal and second terminal is distributed, AP 110 sends radio frames to first terminal and second terminal, so that first terminal and second terminal negotiate code modulation mode by the first running time-frequency resource and carry out D2D communication, so as to reduce the expense of the resource instruction for D2D transmission, improve system throughput.And, since the instruction of D2D resource does not include the information based on D2D terminal such as modulation system, coded format, empty time stream number, specifically modulation system, coded format etc. can voluntarily be negotiated to determine after D2D connection foundation by D2D communication terminal, so as to save the resource overhead of D2D resource distribution instruction, and it can be improved D2D terminal and read the speed of D2D map field (D2D resource impact information), to improve the speed of D2D connection foundation.In addition, preferential multiplexing has been used the running time-frequency resource that will not still interfere when distributing D2D resource, frequency spectrum resource utilization rate can be improved significantly, so that throughput of system is promoted.

Figure 12 is the schematic block diagram of the terminal of another embodiment of the present invention.The terminal 120 of Figure 12 includes processor 121 and memory 122.Processor 121 is connected with memory 122 by bus system 123.

Memory 122 is for storing so that processor 121 executes the instruction operated below: receiving access point What AP was sent carries the radio frames of resource allocation information and D2D mark, wherein resource allocation information is used to indicate the first running time-frequency resource for D2D communication that AP is first terminal and second terminal is distributed, and D2D mark is used to indicate the first D2D mark that AP is first terminal and second terminal is distributed;Negotiate code modulation mode by the first running time-frequency resource and second terminal;According to code modulation mode, D2D communication is carried out by running time-frequency resource and second terminal.Wherein first terminal is terminal 120.

The embodiment of the present invention generates the radio frames for carrying resource allocation information and D2D mark by access point AP, wherein resource allocation information is used to indicate the first running time-frequency resource for D2D communication that AP is first terminal 120 and second terminal is distributed, D2D mark is used to indicate the first D2D mark that AP is first terminal and second terminal is distributed, AP sends radio frames to first terminal and second terminal, so that first terminal and second terminal negotiate code modulation mode by the first running time-frequency resource and carry out D2D communication, so as to reduce the expense of the resource instruction for D2D transmission, improve system throughput.

In addition, terminal 120 can also include transmit circuit 124, receive circuit 125 and antenna 126 etc..The operation of 121 controlling terminal 120 of processor, processor 121 can also be known as CPU (Central Processing Unit, central processing unit).Memory 122 may include read-only memory and random access memory, and provide instruction and data to processor 121.The a part of of memory 122 can also include nonvolatile RAM (NVRAM).In specific application, transmit circuit 124 and reception circuit 125 may be coupled to antenna 126.The various components of terminal 120 are coupled by bus system 123, and wherein bus system 123 can also include power bus, control bus and status signal bus in addition etc. in addition to including data/address bus.But for the sake of clear explanation, various buses are all designated as bus system 123 in figure.

The method that the embodiments of the present invention disclose can be applied in processor 121, or be realized by processor 121.Processor 121 may be a kind of IC chip, the processing capacity with signal.During realization, each step of the above method can be completed by the integrated logic circuit of the hardware in processor 121 or the instruction of software form.Above-mentioned processor 121 can be general processor, digital signal processor (DSP), specific integrated circuit (ASIC), ready-made programmable gate array (FPGA) either other programmable logic device, discrete gate or transistor logic, discrete hardware components.It may be implemented or execute disclosed each method, step and the logic diagram in the embodiment of the present invention.General processor can be microprocessor or the processor is also possible to any conventional processor etc..The step of method in conjunction with disclosed in the embodiment of the present invention, can be embodied directly in hardware decoding processor and execute completion, or in decoding processor hardware and software module combination execute completion.Software module can be located at random access memory, flash memory, read-only memory, programmable read only memory or electrically erasable programmable memory, In the storage medium of this fields such as register maturation.The step of storage medium is located at memory 122, and processor 121 reads the information in memory 122, completes the above method in conjunction with its hardware.

Optionally, as one embodiment, radio frames include D2D configuration field and D2D map field, D2D configuration field is used to indicate the location information that radio frames include D2D map field and D2D map field, D2D map field includes the location information and the first D2D mark of the first running time-frequency resource, wherein the first running time-frequency resource is located at the subsequent upstream frame of radio frames.

Optionally, it is located at the non-traditional signaling field after the legacy preamble field of radio frames as one embodiment, D2D configuration field and D2D map field.

Optionally, as one embodiment, D2D configuration field is located at the HEW-SIG part A of non-traditional signaling field or the HEW-SIG part B of non-traditional signaling field, and D2D map field is located at the HEW-SIG part B of non-traditional signaling field.

Optionally, as one embodiment, D2D configuration field is located at the non-traditional signaling field of radio frames or the data portion of radio frames, and D2D map field is located at the data portion of radio frames.

Optionally, as one embodiment, radio frames include map field, map field is located at the HEW-SIG part B of radio frames or the data portion of radio frames, at least one bit of the starting of map field is D2D map field for identity map field, D2D map field includes the location information and the first D2D mark of the first running time-frequency resource, wherein the first running time-frequency resource is located at the subsequent upstream frame of radio frames.

Optionally, as one embodiment, first terminal is received before the radio frames that access point AP is sent, further includes: sends the request message for being used for requesting the D2D communication link established between second terminal to AP by transmit circuit 124.

Optionally, as one embodiment, request message carries the first information list for the adjacent terminals that first terminal detects, response message carries the second information list of the adjacent terminals that second terminal detects, in order to the existing D2D list of AP list, the second information list and AP according to the first information, the first running time-frequency resource and the first D2D mark for first terminal and second terminal distribution for D2D communication, wherein, the existing D2D list of AP includes the occupied running time-frequency resource of terminal and D2D mark that D2D communication connection has been established.

Optionally, as one embodiment, first terminal is received before the radio frames that access point AP is sent, further includes: receives the D2D link establishment confirmation message that AP is sent by receiving circuit 125, wherein D2D link establishment confirmation message carries the first D2D mark.

The embodiment of the present invention generates the radio frames for carrying resource allocation information and D2D mark by access point AP, and it is being used for of distributing of first terminal and second terminal that wherein resource allocation information, which is used to indicate AP, First running time-frequency resource of D2D communication, D2D mark is used to indicate the first D2D mark that AP is first terminal and second terminal is distributed, AP sends radio frames to first terminal and second terminal, so that first terminal and second terminal negotiate code modulation mode by the first running time-frequency resource and carry out D2D communication, so as to reduce the expense of the resource instruction for D2D transmission, improve system throughput.And, since the instruction of D2D resource does not include the information based on D2D terminal such as modulation system, coded format, empty time stream number, specifically modulation system, coded format etc. can voluntarily be negotiated to determine after D2D connection foundation by D2D communication terminal, so as to save the resource overhead of D2D resource distribution instruction, and it can be improved D2D terminal and read the speed of D2D map field (D2D resource impact information), to improve the speed of D2D connection foundation.In addition, preferential multiplexing has been used the running time-frequency resource that will not still interfere when distributing D2D resource, frequency spectrum resource utilization rate can be improved significantly, so that throughput of system is promoted.

It should be understood that the terms "and/or", only a kind of incidence relation for describing affiliated partner, indicates may exist three kinds of relationships, for example, A and/or B, can indicate: individualism A exists simultaneously A and B, these three situations of individualism B.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".

It should be understood that, in various embodiments of the present invention, magnitude of the sequence numbers of the above procedures are not meant that the order of the execution order, and the execution sequence of each process should be determined by its function and internal logic, and the implementation process of the embodiments of the invention shall not be constituted with any limitation.

Those of ordinary skill in the art may be aware that unit described in conjunction with the examples disclosed in the embodiments of the present disclosure and algorithm steps, can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Professional technician can use different methods to achieve the described function each specific application, but such implementation should not be considered as beyond the scope of the present invention.

It is apparent to those skilled in the art that for convenience and simplicity of description, system, the specific work process of device and unit of foregoing description can refer to corresponding processes in the foregoing method embodiment, details are not described herein.

In several embodiments provided herein, it should be understood that disclosed systems, devices and methods may be implemented in other ways.Such as, the apparatus embodiments described above are merely exemplary, such as, the division of the unit, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual Coupling, direct-coupling or communication connection can be through some interfaces, the indirect coupling or communication connection of device or unit can be electrical property, mechanical or other forms.

The unit as illustrated by the separation member may or may not be physically separated, and component shown as a unit may or may not be physical unit, it can and it is in one place, or may be distributed over multiple network units.It can some or all of the units may be selected to achieve the purpose of the solution of this embodiment according to the actual needs.

In addition, the functional units in various embodiments of the present invention may be integrated into one processing unit, it is also possible to each unit and physically exists alone, can also be integrated in one unit with two or more units.

If the function is realized in the form of SFU software functional unit and when sold or used as an independent product, can store in a computer readable storage medium.Based on this understanding, substantially the part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products technical solution of the present invention in other words, the computer software product is stored in a storage medium, it uses including some instructions so that a computer equipment (can be personal computer, server or the network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), the various media that can store program code such as magnetic or disk.

It is described above; only a specific embodiment of the invention, but scope of protection of the present invention is not limited thereto, and anyone skilled in the art is in the technical scope disclosed by the present invention; it can easily think of the change or the replacement, should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.

Claims (48)

  1. A kind of method of resource instruction characterized by comprising
    Access point AP generates the radio frames for carrying resource allocation information and D2D mark, wherein the resource allocation information is used to indicate the first running time-frequency resource for D2D communication that the AP is first terminal and second terminal is distributed, and the D2D mark is used to indicate the first D2D mark that the AP is the first terminal and the second terminal is distributed;
    The AP sends the radio frames to the first terminal and the second terminal, so that the first terminal and the second terminal carry out D2D communication by first running time-frequency resource.
  2. According to the method for claim 1, it is characterized in that, the radio frames include D2D configuration field and D2D map field, the D2D configuration field is used to indicate the location information that the radio frames include the D2D map field and the D2D map field, the D2D map field includes the location information and the first D2D mark of first running time-frequency resource, wherein first running time-frequency resource is located at the subsequent upstream frame of the radio frames.
  3. According to the method described in claim 2, it is characterized in that, the D2D configuration field and the D2D map field are located at the non-traditional signaling field after the legacy preamble field of the radio frames.
  4. According to the method for claim 3, it is characterized in that, the D2D configuration field is located at the HEW-SIG part A of the non-traditional signaling field or the HEW-SIG part B of the non-traditional signaling field, and the D2D map field is located at the HEW-SIG part B of the non-traditional signaling field.
  5. According to the method described in claim 2, the D2D map field is located at the data portion of the radio frames it is characterized in that, the D2D configuration field is located at the non-traditional signaling field of the radio frames or the data portion of the radio frames.
  6. According to the method for claim 1, it is characterized in that, the radio frames include map field, the map field is located at the HEW-SIG part B of the radio frames or the data portion of the radio frames, at least one bit of the starting of the map field is D2D map field for identifying the map field, and the D2D map field includes the location information and described first of first running time-frequency resource D2D mark, wherein first running time-frequency resource is located at the subsequent upstream frame of the radio frames.
  7. The method according to claim 2 or 6, which is characterized in that the D2D map field only includes the resource allocation information and D2D mark.
  8. The method according to claim 2 or 6, which is characterized in that the D2D map field only includes the resource allocation information, D2D mark and D2D power control information.
  9. The method according to claim 1, wherein described access point AP is generated before carrying the radio frames that resource allocation information and D2D are identified, further includes:
    The request message that the first terminal is sent is received, the request message is used for the D2D communication link for requesting to establish between the second terminal;
    The request message is sent to the second terminal;
    The response message that the second terminal is sent is received, the response message is used to indicate the second terminal and agrees to establish D2D communication link with the first terminal.
  10. According to the method described in claim 9, the response message carries the second information list of the adjacent terminals that the second terminal detects it is characterized in that, the request message carries the first information list for the adjacent terminals that the first terminal detects,
    After the response message for receiving the second terminal transmission, further includes:
    Determine the running time-frequency resource and D2D mark in the existing D2D list of the AP, whether occupied by the terminal in the first information list and second information list, wherein, the existing D2D list of the AP includes the occupied running time-frequency resource of terminal and D2D mark that D2D communication connection has been established;
    When the running time-frequency resource and D2D mark in the existing D2D list of the AP, when all being occupied by the terminal in the first information list and second information list, for the first terminal and second terminal distribution in the existing D2D list of the AP running time-frequency resource and D2D identifies different first running time-frequency resource and the first D2D is identified;
    When the running time-frequency resource and D2D mark in the existing D2D list of the AP, when part is occupied by the terminal in the first information list and second information list, distributes in the existing D2D list of the AP and do not provided by one in the running time-frequency resource and D2D mark of the terminal occupancy in the first information list and second information list as first time-frequency for the first terminal and the second terminal Source and the first D2D mark, or for the first terminal and second terminal distribution in the existing D2D list of the AP running time-frequency resource and D2D identifies different first running time-frequency resource and the first D2D is identified;
    When the running time-frequency resource and D2D mark in the existing D2D list of the AP, when not occupied by the terminal in the first information list and second information list, for the first terminal and second terminal distribution in the existing D2D list of the AP running time-frequency resource and D2D identifies identical or different first running time-frequency resource and the first D2D is identified.
  11. According to the method for claim 10, it is characterized in that, described access point AP determination is established after the D2D communication link between first terminal and second terminal, further include: D2D link establishment confirmation message is sent to the first terminal and the second terminal respectively, wherein, the D2D link establishment confirmation message includes the first D2D mark.
  12. The method according to claim 1, wherein the method also includes:
    The D2D link for receiving the first terminal or second terminal transmission releases request;
    D2D link, which is sent, to the first terminal and the second terminal releases message.
  13. The method according to claim 1, wherein the method also includes:
    When the AP determines that the first terminal or the second terminal are disconnected with the AP, or it is long when reaching threshold value in the presence of the D2D link between the first terminal and the second terminal, Xiang Suoshu first terminal and the second terminal send D2D link and release message.
  14. A kind of method of resource instruction characterized by comprising
    First terminal receives the radio frames for carrying resource allocation information and D2D mark that access point AP is sent, wherein the resource allocation information is used to indicate the first running time-frequency resource for D2D communication that the AP is the first terminal and second terminal is distributed, and the D2D mark is used to indicate the first D2D mark that the AP is the first terminal and the second terminal is distributed;
    The first terminal negotiates code modulation mode by first running time-frequency resource and the second terminal;
    The first terminal carries out D2D communication according to the code modulation mode, by the running time-frequency resource and the second terminal.
  15. According to the method for claim 14, it is characterized in that, the radio frames include D2D configuration field and D2D map field, the D2D configuration field is used to indicate the location information that the radio frames include the D2D map field and the D2D map field, the D2D map field includes the location information and the first D2D mark of first running time-frequency resource, wherein first running time-frequency resource is located at the subsequent upstream frame of the radio frames.
  16. According to the method for claim 14, which is characterized in that the D2D configuration field and the D2D map field are located at the non-traditional signaling field after the legacy preamble field of the radio frames.
  17. According to the method for claim 16, it is characterized in that, the D2D configuration field is located at the HEW-SIG part A of the non-traditional signaling field or the HEW-SIG part B of the non-traditional signaling field, and the D2D map field is located at the HEW-SIG part B of the non-traditional signaling field.
  18. According to the method for claim 15, which is characterized in that the D2D configuration field is located at the non-traditional signaling field of the radio frames or the data portion of the radio frames, and the D2D map field is located at the data portion of the radio frames.
  19. According to the method for claim 14, it is characterized in that, the radio frames include map field, the map field is located at the HEW-SIG part B of the radio frames or the data portion of the radio frames, at least one bit of the starting of the map field is D2D map field for identifying the map field, the D2D map field includes the location information and the first D2D mark of first running time-frequency resource, wherein first running time-frequency resource is located at the subsequent upstream frame of the radio frames.
  20. Method described in 5 or 19 according to claim 1, which is characterized in that the D2D map field only includes the resource allocation information and D2D mark.
  21. Method described in 5 or 19 according to claim 1, which is characterized in that the D2D map field only includes the resource allocation information, D2D mark and D2D power control information.
  22. According to the method for claim 14, it is characterized in that, the first terminal receives before the radio frames that access point AP is sent, further include: Xiang Suoshu AP sends the request message for requesting the D2D communication link established between the second terminal, so that the AP sends the request message to the second terminal, and the response message that the second terminal is sent according to the request message is received, the response message is used to indicate the second terminal and agrees to establish D2D communication link with the first terminal.
  23. According to the method for claim 22, it is characterized in that, the request message carries the first information list for the adjacent terminals that the first terminal detects, the response message carries the second information list of the adjacent terminals that the second terminal detects, in order to which the AP is according to the first information list, the existing D2D list of second information list and the AP, first running time-frequency resource and the first D2D mark for the first terminal and second terminal distribution for D2D communication, wherein, the existing D2D list of the AP includes the occupied running time-frequency resource of terminal and D2D mark that D2D communication connection has been established.
  24. According to the method for claim 23, which is characterized in that the first terminal receives before the radio frames that access point AP is sent, further includes:
    Receive the D2D link establishment confirmation message that the AP is sent, wherein the D2D link establishment confirmation message carries the first D2D mark.
  25. A kind of access point AP characterized by comprising
    Generation unit, for generating the radio frames for carrying resource allocation information and D2D mark, wherein the resource allocation information is used to indicate the first running time-frequency resource for D2D communication that the AP is first terminal and second terminal is distributed, and the D2D mark is used to indicate the first D2D mark that the AP is the first terminal and the second terminal is distributed;
    Transmission unit, for sending the radio frames to the first terminal and the second terminal, so that the first terminal and the second terminal carry out D2D communication by first running time-frequency resource.
  26. AP according to claim 25, it is characterized in that, the radio frames include D2D configuration field and D2D map field, and the D2D configuration field is used to indicate the location information that the radio frames include the D2D map field and the D2D map field, and the D2D map field includes The location information of first running time-frequency resource and the first D2D mark, wherein first running time-frequency resource is located at the subsequent upstream frame of the radio frames.
  27. AP according to claim 26, which is characterized in that the D2D configuration field and the D2D map field are located at the non-traditional signaling field after the legacy preamble field of the radio frames.
  28. AP according to claim 27, it is characterized in that, the D2D configuration field is located at the HEW-SIG part A of the non-traditional signaling field or the HEW-SIG part B of the non-traditional signaling field, and the D2D map field is located at the HEW-SIG part B of the non-traditional signaling field.
  29. AP according to claim 26, which is characterized in that the D2D configuration field is located at the non-traditional signaling field of the radio frames or the data portion of the radio frames, and the D2D map field is located at the data portion of the radio frames.
  30. AP according to claim 25, it is characterized in that, the radio frames include map field, the map field is located at the HEW-SIG part B of the radio frames or the data portion of the radio frames, at least one bit of the starting of the map field is D2D map field for identifying the map field, the D2D map field includes the location information and the first D2D mark of first running time-frequency resource, wherein first running time-frequency resource is located at the subsequent upstream frame of the radio frames.
  31. The AP according to claim 26 or 28, which is characterized in that the D2D map field only includes the resource allocation information and D2D mark.
  32. The AP according to claim 26 or 30, which is characterized in that the D2D map field only includes the resource allocation information, D2D mark and D2D power control information.
  33. AP according to claim 25, which is characterized in that the AP further includes receiving unit, and the receiving unit is specifically used for:
    The request message that the first terminal is sent is received, the request message is used for the D2D communication link for requesting to establish between the second terminal;
    By the transmission unit, Xiang Suoshu second terminal sends the request message;
    The response message that the second terminal is sent is received, the response message is used to indicate the second terminal and agrees to establish D2D communication link with the first terminal.
  34. AP according to claim 33, which is characterized in that the request message carries the first information list for the adjacent terminals that the first terminal detects, the response message carries the second information list of the adjacent terminals that the second terminal detects,
    The AP further includes determination unit, and the determination unit is used for:
    Determine the running time-frequency resource and D2D mark in the existing D2D list of the AP, whether occupied by the terminal in the first information list and second information list, wherein, the existing D2D list of the AP includes the occupied running time-frequency resource of terminal and D2D mark that D2D communication connection has been established;
    When the running time-frequency resource and D2D mark in the existing D2D list of the AP, when all being occupied by the terminal in the first information list and second information list, for the first terminal and second terminal distribution in the existing D2D list of the AP running time-frequency resource and D2D identifies different first running time-frequency resource and the first D2D is identified;
    When the running time-frequency resource and D2D mark in the existing D2D list of the AP, when part is occupied by the terminal in the first information list and second information list, it is identified for one that the first terminal and the second terminal are distributed in the running time-frequency resource not occupied by the terminal in the first information list and second information list in the existing D2D list of the AP and D2D mark as first running time-frequency resource and the first D2D, or for the first terminal and second terminal distribution in the existing D2D list of the AP running time-frequency resource and D2D identifies different first running time-frequency resource and the first D2D is identified;
    When the running time-frequency resource and D2D mark in the existing D2D list of the AP, when not occupied by the terminal in the first information list and second information list, for the first terminal and second terminal distribution in the existing D2D list of the AP running time-frequency resource and D2D identifies identical or different first running time-frequency resource and the first D2D is identified.
  35. AP according to claim 34, which is characterized in that the transmission unit is also used to: D2D link establishment confirmation message is sent to the first terminal and the second terminal respectively, wherein the D2D link establishment confirmation message includes the first D2D mark.
  36. AP according to claim 25, which is characterized in that the AP further includes receiving unit, and the receiving unit is used for:
    The D2D link for receiving the first terminal or second terminal transmission releases request;
    The transmission unit is also used to, and Xiang Suoshu first terminal and the second terminal send D2D link and release message.
  37. AP according to claim 25, which is characterized in that the transmission unit is also used to:
    When the AP determines that the first terminal or the second terminal are disconnected with the AP, or it is long when reaching threshold value in the presence of the D2D link between the first terminal and the second terminal, Xiang Suoshu first terminal and the second terminal send D2D link and release message.
  38. A kind of terminal characterized by comprising
    Receiving unit, for receiving the radio frames for carrying resource allocation information and D2D mark of access point AP transmission, it is the first running time-frequency resource for D2D communication that the terminal and second terminal are distributed that wherein the resource allocation information, which is used to indicate the AP, and it is the first D2D mark that the terminal and the second terminal are distributed that the D2D mark, which is used to indicate the AP,;
    Negotiation element, for negotiating code modulation mode by first running time-frequency resource and the second terminal;
    Communication unit, for carrying out D2D communication by the running time-frequency resource and the second terminal according to the code modulation mode.
  39. The terminal according to claim 38, it is characterized in that, the radio frames include D2D configuration field and D2D map field, the D2D configuration field is used to indicate the location information that the radio frames include the D2D map field and the D2D map field, the D2D map field includes the location information and the first D2D mark of first running time-frequency resource, wherein first running time-frequency resource is located at the subsequent upstream frame of the radio frames.
  40. The terminal according to claim 38, which is characterized in that the D2D configuration field and the D2D map field are located at the non-traditional signaling field after the legacy preamble field of the radio frames.
  41. Terminal according to claim 40, which is characterized in that the D2D configuration words section In the HEW-SIG part A of the non-traditional signaling field or the HEW-SIG part B of the non-traditional signaling field, the D2D map field is located at the part HEW-SIGB of the non-traditional signaling field.
  42. Terminal according to claim 39, which is characterized in that the D2D configuration field is located at the non-traditional signaling field of the radio frames or the data portion of the radio frames, and the D2D map field is located at the data portion of the radio frames.
  43. The terminal according to claim 38, it is characterized in that, the radio frames include map field, the map field is located at the HEW-SIG part B of the radio frames or the data portion of the radio frames, at least one bit of the starting of the map field is D2D map field for identifying the map field, the D2D map field includes the location information and the first D2D mark of first running time-frequency resource, wherein first running time-frequency resource is located at the subsequent upstream frame of the radio frames.
  44. The terminal according to claim 39 or 43, which is characterized in that the D2D map field only includes the resource allocation information and D2D mark.
  45. The terminal according to claim 39 or 43, which is characterized in that the D2D map field only includes the resource allocation information, D2D mark and D2D power control information.
  46. The terminal according to claim 38, which is characterized in that the communication unit is also used to:
    The request message for requesting the D2D communication link established between the second terminal is sent to the AP, so that the AP sends the request message to the second terminal, and the response message that the second terminal is sent according to the request message is received, the response message is used to indicate the second terminal and agrees to establish D2D communication link with the first terminal.
  47. Terminal according to claim 46, it is characterized in that, the request message carries the first information list for the adjacent terminals that the terminal detects, the response message carries the second information list of the adjacent terminals that the second terminal detects, in order to which the AP is according to the existing D2D list of the first information list, second information list and the AP, first running time-frequency resource and the first D2D mark for the terminal and second terminal distribution for D2D communication, wherein The existing D2D list of the AP includes the occupied running time-frequency resource of terminal and D2D mark that D2D communication connection has been established.
  48. Terminal according to claim 47, which is characterized in that the communication unit is also used to:
    Receive the D2D link establishment confirmation message that the AP is sent, wherein the D2D link establishment confirmation message carries the first D2D mark.
CN201580060913.5A 2015-01-13 2015-01-13 Method, access point and terminal that resource is indicated CN107079441A (en)

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