CN104902579A - Method for direct-connect communication between terminals in wireless network communication system - Google Patents
Method for direct-connect communication between terminals in wireless network communication system Download PDFInfo
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- CN104902579A CN104902579A CN201310648075.6A CN201310648075A CN104902579A CN 104902579 A CN104902579 A CN 104902579A CN 201310648075 A CN201310648075 A CN 201310648075A CN 104902579 A CN104902579 A CN 104902579A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0215—Traffic management, e.g. flow control or congestion control based on user or device properties, e.g. MTC-capable devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/14—Direct-mode setup
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention provides a method for direct-connect communication between terminals in a wireless network communication system. The method comprises the steps that a server assigns direct-connect communication resources to the authorized terminals in a direct-connect communication scenario; direct-connect communication is performed between terminals and terminals by the terminals in a terminal group according to the assigned direct-connect communication resources; partial terminals with capacity of establishing a bidirectional link with a base station in the terminal group can feed back measurement statistical information to the server; and resource assignment is adjusted by the server according to the back-fed direct-connect communication measurement statistical information and the current system state. According to the method for direct-connect communication between the terminals in the wireless network communication system, power consumption of connection-oriented communication process is avoided; a time division multiplexing mode is adopted and the method is compatible with existing wireless communication systems; meanwhile, system time slot resources used by direct-connect communication between the terminals are configured by the set server, and time slot resource allocation can be adjusted by the server according to the measurement statistical information so that utilization rate of the system resources is enhanced.
Description
Technical field
The present invention relates to the technical field of wireless communication, the method for particularly direct-connected communication between terminal in a kind of wireless network communications system.
Background technology
In wireless network communications system, the direct-connected communication technology of the low-power consumption of terminal room take Bluetooth technology as typical case.Bluetooth is the radiotechnics of short haul connection between a kind of support equipment (general 10m in), can carry out wireless messages exchange comprising between numerous equipment such as mobile phone, PDA, wireless headset, notebook computer, related peripherals.Utilize Bluetooth technology effectively can simplify communication between mobile communication terminal device, also can communication successfully between simplified apparatus and internet, thus make transfer of data become efficient more rapidly, for radio communication has widened road.Bluetooth adopts distributed network structure and fast frequency hopping and short packet technology, support point-to-point and point-to-multipoint delivery, be operated in the 2.4GHz industry of global general-use, science, medical science (Industrial Scientific Medical, ISM) frequency range, its data rate is 1Mbps, and adopts time division duplex transmission scheme to realize full duplex transmission.
Along with the development of technology of Internet of things, the low-power consumption direct communication between terminal and terminal and data interaction technology more and more come into one's own.The characteristic feature of Internet of Things application scenarios assembles a large amount of equipment in limited region.According to estimates, to the year two thousand twenty, in typical thing connection application scenarios, the quantity of the InterWorking Equipment of every square kilometre will more than 400,000.Therefore, Bluetooth technology can not deal with this application scenarios when the time comes.
For traditional wireless communication technology, under the control of wireless base station, the communication between terminal and terminal realizes the data interaction between terminal and terminal by the data relay of wireless network.The primary goal of wireless communication technology is to provide the wireless network of the seamless coverage of a wide area.For ensureing the continuity of data communication of terminal room, the terminal of movement to perform with certain frequency various measurement and and wireless base station between information interaction, and to need in communication process and wireless base station maintenance connection status.But this process can cause the consumption of terminal electric power, the interconnected requirement of Internet of Things of low-power consumption can not be adapted to.
But traditional wireless communication technology, has feature controlled and capacious, communication frequency is the proprietary frequency spectrum of authorizing, and interference level is in controllable state.How the feature of two kinds of communication technologys is combined, provide a kind of controlled Large Copacity low-power consumption direct-connecting technology to become current popular research topic.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide the method for direct-connected communication between terminal in a kind of wireless network communications system, existing mobile radio communication network can be compatible with, can the Capability Requirement of the load of comprehensive consideration system, transmission bandwidth and terminal.
For achieving the above object and other relevant objects, the invention provides the method for direct-connected communication between terminal in a kind of wireless network communications system, at least comprise: server is the direct-connected communication resource of terminal assignments authorized in direct-connected communication scenes; Wherein the direct-connected communication resource is time interval resource; According to the direct-connected communication resource of assigning, the terminal in set of terminal carries out the direct-connected communication between terminal and terminal; Possess the part terminal setting up two-way link ability between base station in set of terminal and can measure statistical information to server feedback; Server is according to the direct communication measurement statistical information of feedback and current system conditions, and adjustresources is assigned.
According to the method for direct-connected communication between terminal in above-mentioned wireless network communications system, wherein: the terminal of only obtaining the authorization could be decoded to the direct-connected communication resource and direct-connected information; In direct-connected communication scenes, all authorized terminals can receive the resource assignment that direct-connected communication scenes identifies.
According to the method for direct-connected communication between terminal in above-mentioned wireless network communications system, wherein: the uplink carrier frequencies that the carrier frequency that direct-connected communication uses is system.
According to the method for direct-connected communication between terminal in above-mentioned wireless network communications system, wherein: described measurement statistical information comprises direct-connected communication channel quality, resource utilization.
According to the method for direct-connected communication between terminal in above-mentioned wireless network communications system, wherein: if a terminal take part in multiple direct-connected communication scenes, then this terminal can to the multiple measurement statistical information of base station feedback.
According to the method for direct-connected communication between terminal in above-mentioned wireless network communications system, wherein: described direct-connected communication is divided into controlled mode and free schema, the direct-connected communication of terminal room is the communication pattern towards non-link, does not require to keep connection status between terminal and wireless base station.
Further, according to the method for direct-connected communication between terminal in above-mentioned wireless network communications system, wherein: when realizing the direct-connected communication of controlled mode in LTE system, the direct-connected communication resource is LTE ascending time slot resource, wherein,
Server is that in direct-connected communication scenes, all authorized terminals send resource allocation message, and wherein, described resource allocation message is encrypted NAS message;
Server sends signaling to base station, and for direct-connected communication scenes reserves ascending time slot resource, wherein, the content in reserved time interval resource and NAS message is consistent;
Server chooses the interim instruction of D-RNTI as wireless network; NAS message is carried on PDSCH by base station, and sends to terminal authorized in set of terminal; The PDSCH resource of carrying NAS message is indicated by PDCCH, and PDCCH is identified by D-RNTI;
Terminal detects the PDCCH of D-RNTI mark, obtains the PDSCH resource mapping information of NAS message, and recycling private key is decoded to NAS message, obtains the resource information that set of terminal is authorized.
Further, according to the method for direct-connected communication between terminal in above-mentioned wireless network communications system, wherein: when realizing the direct-connected communication of free schema in LTE system, the direct-connected communication resource is LTE ascending time slot resource, wherein,
The direct-connected communication resource of server-assignment; Direct-connected communication resource information, with the pattern of system broadcast message, is broadcasted by base station in community;
Terminal receives the direct-connected communication resource and assigns broadcast, and adopts the mode that the direct-connected communication resource is competed, and carries out the direct-connected communication between terminal and terminal.
According to the method for direct-connected communication between terminal in above-mentioned wireless network communications system, wherein: under direct-connected communication scenes, the method for Resourse Distribute comprises:
Data receiver is measured the operable direct-connected communication resource, will meet the resource information alternatively resource information of quality requirement, in random access guiding response message, send to data sending terminal;
Data sending terminal is measured the operable direct-connected communication resource, according to measurement result, screens candidate resource, and the resource information filtered out is sent to data receiver in data sending request message;
The resource that data receiver filters out according to data sending terminal, in data sending request response message, sends the direct-connected communication resource of data transmission to data sending terminal.
According to the method for direct-connected communication between terminal in above-mentioned wireless network communications system, wherein: when realizing the direct-connected communication between terminal in LTE system, the direct-connected communication resource is LTE ascending time slot resource, and carrier frequency is LTE system up channel carrier frequency; Wherein,
Data sending terminal carries out following operation:
Data sending terminal sends random access guiding in Random Access Channel;
Data sending terminal is after sending random access guiding, and in window, wait for random access guiding response instruction, random access guiding response is designated as the PUCCH of RA-RNTI mark, and window size is configured by LTE system;
If data sending terminal detects random access guiding response instruction in wait window, then indicate according to random access guiding response the PUSCH resource identified, receive random access guiding response, otherwise, after waiting for certain interval, again send random access guiding;
The PUSCH of data sending terminal represented by random access guiding response instruction, carrying random access guiding response message, receives random access guiding response data, and judges whether following condition is set up:
A, data sending terminal are successfully decoded random access guiding response data packet;
B, random access guiding mark is consistent with the random access guiding sent before data sending terminal;
C, data receiver authentication are passed through;
The data that d, data receiver distribute send resource and meet the requirements;
The temporary identifications that e, data receiver distribute to data sending terminal meets the requirements;
If condition is set up, the PUSCH resource distribution of data sending terminal indicated by random access guiding response, sends the instruction of data sending request message and data sending request message; If be false, then after certain interval of time, continue to send random access guiding;
Data sending terminal, after transmission data sending request message, waits for that in window the PUCCH message that C-RNTI indicates, PUCCH message are data sending request response instruction; If receive data sending request response instruction, according to the PUSCH resource mapping rule entrained by data sending request response instruction, receive data sending request response message; If do not receive data sending request response instruction in window, so after certain interval of time, again send random access guiding;
The PUSCH resource that data sending terminal distributes according to data sending request response message and time interval resource, send data;
Data receiver comprises following operation:
Data receiver sends rule according to the predefined random access guiding of LTE system, detects random access guiding;
After data receiver correctly detects random access guiding, identify PUCCH with RA-RNTI, send random access guiding response instruction, and indicate the PUSCH channel identified to send random access guiding response message in response;
After data receiver sends random access guiding response, the data sending request instruction of data sending terminal is detected in window, if receive the data sending request instruction of data sending terminal, according to the PUSCH channel information entrained by the data sending request Indication message of data sending terminal, receive data sending request message, and according to data sending request message content, send data sending request response to data sending terminal; Otherwise flow process terminates;
Data receiver receives the data that data sending terminal sends on the PUSCH channel resource distributed.
As mentioned above, the method for direct-connected communication between terminal in wireless network communications system of the present invention, has following beneficial effect:
(1) in the direct-connected communication process between terminal and terminal, connection status is kept not to be a condition that must possess with wireless base station, direct-connected communication process between terminal and terminal is a disconnected communication process, and connection-oriented communication process can be avoided the consumption of electric power;
(2) the direct-connected communication between terminal and terminal and the communication between terminal and base station, adopt time-multiplexed mode, coexists, be compatible with existing wireless communications system among a system;
(3) the system time gap resource that between terminal and terminal, direct-connected communication uses, is configured by the server arranged, and server can according to measurement statistical information, and adjustment distributing slot resources, improves resource utilization ratio.
Accompanying drawing explanation
Fig. 1 is shown as the process schematic of direct-connected communication between terminal in wireless network communications system in the present invention;
Fig. 2 is shown as the process schematic of the identical direct-connected communication scenes of multiple Intra-cell administration in the present invention under controlled mode;
Fig. 3 is shown as the schematic flow sheet of the identical direct-connected communication scenes of multiple Intra-cell administration in the present invention under controlled mode;
Fig. 4 is shown as the process schematic of direct-connected communication between terminal and terminal under free schema in the present invention
Fig. 5 is shown as in the present invention based on the competition flow chart that communicate direct-connected with the terminal room of handshake method;
Fig. 6 to be shown as in the present invention resource allocation negotiation flow chart under direct-connected communication scenes;
Fig. 7 is shown as the schematic diagram realizing the direct-connected communication of controlled mode in the present invention in LTE system.
Embodiment
Below by way of specific instantiation, embodiments of the present invention are described, those skilled in the art the content disclosed by this specification can understand other advantages of the present invention and effect easily.The present invention can also be implemented or be applied by embodiments different in addition, and the every details in this specification also can based on different viewpoints and application, carries out various modification or change not deviating under spirit of the present invention.
It should be noted that, the diagram provided in the present embodiment only illustrates basic conception of the present invention in a schematic way, then only the assembly relevant with the present invention is shown in graphic but not component count, shape and size when implementing according to reality is drawn, it is actual when implementing, and the kenel of each assembly, quantity and ratio can be a kind of change arbitrarily, and its assembly layout kenel also may be more complicated.
The present invention, by time-multiplexed mode, realizes the direct-connected communication pattern of terminal room in existing wireless communication system.Direct-connected communication pattern is divided into controlled mode and free schema.Under controlled mode, a kind of direct-connected communication service of ensuring the quality of products can be provided for authorized terminal.Under free schema, can by operator as required, be the public direct-connected communication service that all terminals in wireless coverage area provide non-mass to ensure.The direct-connected communication of terminal room, for a kind of towards the communication pattern of non-link, does not require to keep connection status between terminal and wireless base station.
Refer to Fig. 1, in wireless network communications system of the present invention, between terminal, the method for direct-connected communication comprises:
Server is the direct-connected communication resource of terminal assignments authorized in direct-connected communication scenes, and wherein, resource assignment identifies with direct-connected communication scenes mark D2DcaseID.There are 2 groups of terminals to carry out direct-connected communication in Fig. 1, are respectively scene D2DCaseIDA and D2DCaseID B, represent with region shown in region and pecked line shown in dotted line respectively.The terminal of only obtaining the authorization could be decoded to the direct-connected communication resource and direct-connected information.Wherein, the direct-connected communication resource is time interval resource.
In set of terminal in community, all authorized terminals can receive the resource assignment that direct-connected communication scenes D2DCaseID identifies.According to the direct-connected communication resource of assigning, the terminal in set of terminal carries out the direct-connected communication between terminal and terminal.
In set of terminal, part terminal possesses the ability setting up two-way link between base station.These terminals can be fed back to server Y and measure statistical information, comprise direct-connected communication channel quality, resource utilization.The direct-connected communication scenes D2DCaseID that measurement statistical information terminal participates in identifies.If a terminal take part in multiple direct-connected communication scenes, so, terminal to the multiple measurement statistical information of base station feedback, can identify with D2DCaseID respectively.
Server Y, according to direct communication measurement statistical information and the current system conditions of feedback, adjustresources is assigned.
Embodiment one
Refer to Fig. 2 and Fig. 3, the present embodiment is the identical direct-connected communication scenes process of multiple Intra-cell administration under controlled mode.Wherein, base station A and base station B corresponding Liang Ge community Cell A and Cell B respectively.Authorization terminal in direct-connected communication scenes D2DCaseX is distributed in Cell A and Cell B.Server assigns resource assignment ResourceAllotA and ResourceAllotB of the D2DCaseX of Cell A and Cell B respectively.Authorization terminal in D2DCaseX, according to intensity and the quality of the pilot signal of Cell A and Cell B, determines that resident community is Cell A and Cell B.Reside in the D2DCaseX terminal in Cell, utilize the resource assignment of current area, carry out direct-connected communication.
Embodiment two
Refer to Fig. 4, the present embodiment is direct-connected communication process between terminal and terminal under free schema.Wherein, under the control of server, the public direct-connected communication resource is broadcasted in base station in community.Terminal in persistent district, receiving slot resource assignment broadcast.Terminal adopts the mode of resource contention, carries out the direct-connected communication between terminal and terminal.
Embodiment three
Refer to Fig. 5, the present embodiment is based on the competition method that communicate direct-connected with the terminal room of handshake method, and all information mutual between transmitting terminal and receiving terminal, are all carried on the direct-connected communication resource that is assigned with in community.Specifically comprise the following steps:
Step 1, data sending terminal, the Random Access Channel in the direct-connected communication resource sends random access guiding, after sending random access guiding, and the random access guiding response instruction of monitored data receiving terminal in a window pre-set.
Step 2, data receiver monitor random access guiding on a random access channel, and to leadingly responding of listening to, leading response comprises following content:
A, random access guiding response instruction, the control channel in the direct-connected communication resource sends, carries out scrambling by predefined code, instruction random access guiding response data packet resource mapping on a traffic channel;
B, random access guiding response data packet, comprising: the random access guiding mark received, data receiver identify label, the spendable Resourse Distribute of transmitting terminal channel and data sending terminal temporary identifications;
The pattern that c, random access guiding response data packet can be selected to encrypt sends.
If step 3, data sending terminal listen to the random access guiding response instruction of data receiver in a window pre-set, then indicate according to leading response the traffic channel resource identified, receive random access guiding response data, and judge whether following content is set up:
A, data sending terminal are successfully decoded random access guiding response data packet;
B, random access guiding mark is consistent with the random access guiding mark sent before data sending terminal;
C, data receiver authentication are passed through;
The data that d, data receiver distribute send resource and meet the requirements;
The temporary identifications that e, data receiver distribute to data sending terminal meets the requirements.
If all judgements are all set up, so perform step 4, otherwise according to predefined rule, after certain interval of time, resend random access guiding.
Step 4, data sending terminal send data on special control channel, the instruction that sends a request message, send message instruction control channel.Wherein, control channel carries out scrambling by data sending terminal temporary identifications.Data sending request message bearing indicates in data sending request message on the traffic channel resource that identifies, and data sending request message comprises:
A, data sending terminal identification information;
B, terminal send the type identification of data;
C, transmission Information Security mark;
D, spendable candidate resource;
E, data volume size;
The pattern that f, packet can be selected to encrypt sends.
After step 5, data receiver send random access guiding response message, in a window preset, Monitoring Data sends a request message instruction, performs following decision operation:
A, according to data sending request message instruction corresponding to message bearing resource, successful decoded data sends a request message;
B, the identity of transmitting terminal to be differentiated, confirm that transmitting terminal identity information meets the requirements;
C, check Information Security mark and meet and ask;
D, check data type identifier close requirement;
E, can be data sending terminal send resource;
If all operations judgement is all successful, then perform step 6, otherwise flow process terminates.
Step 6, the data receiver data sending request message to data sending terminal responds, send request of data response instruction and request of data response data packet, request of data response instruction is carried on the special control channel in the direct-connected communication resource, the temporary identity ID that control channel is assigned with by data sending terminal identifies, and response message comprises following content:
A, receiving terminal identify label;
B, data send Resourse Distribute;
C, data send the resource repetition period;
The pattern that d, packet can be selected to encrypt sends.
After step 7, data sending terminal have sent data sending request message, in a window preset, Monitoring Data sends request response message instruction, performs following decision operation:
A, receiving terminal identify label checking;
B, Resourse Distribute are verified.
When after all operations judgement all success, the resource of distributing sends data.
Step 8, data sending terminal send data in the resource of distributing.
If step 9 data sending terminal also has data to need to send after last transmission data in the resource be assigned with, in the resource request flag position 1 of data packet head, incidentally go up data sending request message, after Packet Generation, start and wait for window, if in window phase, receive the response message of receiving terminal, so according to newly assigned resource, continue to send data.Otherwise re-execute from step 1.
Step 10, data receiver respond new data sending request message.
Step 11, data sending terminal send data in newly assigned resource.
Embodiment four
Refer to Fig. 6, the present embodiment is the method for resource allocation negotiation under direct-connected communication scenes, and the present embodiment comprises following content:
Data receiver, measures the operable direct-connected communication resource, will meet the resource information alternatively resource information of quality requirement, in random access guiding response message, send to data sending terminal;
Data sending terminal, measures the operable direct-connected communication resource, according to measurement result, screens candidate resource, by the resource information filtered out, in data sending request message, sends to data receiver;
The resource that data receiver filters out according to data sending terminal, in data sending request response message, sends the time interval resource of data transmission to data sending terminal.
Embodiment five
Refer to Fig. 7, the present embodiment is the method realizing the direct-connected communication of controlled mode in LTE system.Wherein: the direct-connected communication resource is LTE ascending time slot resource.Specifically comprise the following steps:
Server is all authorized terminals in D2DCase group, sends resource allocation message through base station.Resource allocation message is encrypted Non-Access Stratum (Non Access Stratum, NAS) packet.
Server sends signaling to base station, is the reserved ascending time slot resource of D2DCase group, and the content in reserved time interval resource and Resourse Distribute NAS message is consistent.
From reserved RNTI FFF4 ~ FFFC, choose a value, be called D-RNTI, indicate as wireless network D2D temporarily.
Base station, by NAS message, is carried on Physical Downlink Shared Channel (Physical Downlink Shared Chanel, PDSCH), sends to terminal authorized in D2DCase group.
The PDSCH resource of carrying NAS message, indicated by Physical Downlink Control Channel (Physical Downlink Control Chanel, PDCCH), PDCCH is identified by D-RNTI.
Terminal detects the PDCCH channel of D-RNTI mark, obtains the PDSCH resource mapping information of NAS message.
Terminal utilizes private key, decodes to NAS message, obtains the resource information that D2DCase group is authorized.
Embodiment six
The present embodiment is the method realizing the direct-connected communication of free schema in LTE system, and the present embodiment comprises following content:
The direct-connected communication resource of server-assignment free schema; Direct-connected communication resource information, with the pattern of system broadcast message, is broadcasted by base station in community.Terminal in persistent district, receiving slot resource assignment broadcast.Terminal adopts the mode of resource contention, carries out the direct-connected communication between terminal and terminal.Wherein, the direct-connected communication resource is LTE ascending time slot resource.
Embodiment seven
The present embodiment is the method realizing direct-connected communication in LTE system between terminal, suppose that terminal is according to embodiment five and six, known the available direct-connected communication resource, all operations are all the LTE ascending time slot resource operations be assigned with, and carrier frequency is LTE system up channel carrier frequency.
Wherein, data sending terminal comprises following operation:
1, data sending terminal sends random access guiding in Random Access Channel.
2, data sending terminal is after sending random access guiding, random access guiding response instruction is waited in window, random access guiding response is designated as Physical Uplink Control Channel (the Physical Uplink Control Chanel of RA-RNTI mark, PUCCH), window size is configured by LTE system.
If 3 data sending terminals detect random access guiding response instruction in wait window, so, Physical Uplink Shared Channel (the Physical Uplink Shared Chanel identified is indicated according to random access guiding response, PUSCH) resource, reception random access guiding responds, otherwise, after waiting for certain interval, again send random access guiding.
4, the PUSCH channel bearing random access guiding response message of data sending terminal represented by random access guiding response instruction, performs the associative operation of step 3 in embodiment four.If judgement is passed through, perform step 5, otherwise after certain interval of time, continue to send random access guiding.
5, the PUSCH resource distribution of data sending terminal indicated by random access guiding response, sends the instruction of data sending request message and data sending request message, wherein
It is the C-RNTI(Temporary Radio Network identity instruction that data receiver distributes that a, data sending request message are designated as data sending terminal) PUCCH that identifies, the information carried in PUCCH is the PUSCH resource information of carrying data sending request message;
B, data sending request message comprise: data sending terminal identification information, terminal send data type identification, send Information Security mark, spendable candidate resource and data volume size.
6, data sending terminal is after transmission data sending request message, waits for that the PUCCH message that C-RNTI indicates, this message are data sending request response instruction in window; If receive response instruction, the PUSCH resource mapping rule entrained by response instruction, receive data sending request response message, window size is configured by LTE system.If do not receive response instruction in window, so after certain interval of time, again send random access guiding.
7, the data sending terminal PUSCH resource of distributing according to data sending request response message and time interval resource, send data.
Data receiver comprises following operation:
1, data receiver sends rule according to the predefined random access guiding of LTE system, detects random access guiding.
2, after data receiver correctly detects random access guiding, identify PUCCH with RA-RNTI, send random access guiding response instruction, and indicate the PUSCH channel identified to send random access guiding response message in response, preamble response message comprises:
A, the random access guiding mark received;
B, data receiver identify label;
C, the spendable Resourse Distribute of transmitting terminal channel;
D, data sending terminal temporary identifications C-RNTI.
3, after data receiver sends random access guiding response, in window, detect the data sending request instruction of data sending terminal, if receive the data sending request instruction of data sending terminal, perform step 4, otherwise flow process terminates.
4, the PUSCH channel information of data receiver entrained by the data sending request Indication message of data sending terminal, receives data sending request message, according to message content, sends data sending request response to data sending terminal.
5, data receiver receives the data that data sending terminal sends on the PUSCH channel resource distributed.
In sum, in the method for direct-connected communication between terminal in wireless network communications system of the present invention, the direct-connected communication process between terminal and terminal is a disconnected communication process, and connection-oriented communication process can be avoided the consumption of electric power; Direct-connected communication between terminal and terminal and the communication between terminal and base station, adopt time-multiplexed mode, coexists, be compatible with existing wireless communications system among a system; The system time gap resource that between terminal and terminal, direct-connected communication uses, is configured by the server arranged, and server can according to measurement statistical information, and adjustment distributing slot resources, improves resource utilization ratio.So the present invention effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (10)
1. a method for direct-connected communication between terminal in wireless network communications system, is characterized in that, at least comprises:
Server is the direct-connected communication resource of terminal assignments authorized in direct-connected communication scenes; Wherein the direct-connected communication resource is time interval resource;
According to the direct-connected communication resource of assigning, the terminal in set of terminal carries out the direct-connected communication between terminal and terminal;
Possess the part terminal setting up two-way link ability between base station in set of terminal and can measure statistical information to server feedback;
Server is according to the direct communication measurement statistical information of feedback and current system conditions, and adjustresources is assigned.
2. the method for direct-connected communication between terminal in wireless network communications system according to claim 1, is characterized in that: the terminal of only obtaining the authorization could be decoded to the direct-connected communication resource and direct-connected information; In direct-connected communication scenes, all authorized terminals can receive the resource assignment that direct-connected communication scenes identifies.
3. the method for direct-connected communication between terminal in wireless network communications system according to claim 1, is characterized in that: the uplink carrier frequencies that the carrier frequency that direct-connected communication uses is system.
4. the method for direct-connected communication between terminal in wireless network communications system according to claim 1, is characterized in that: described measurement statistical information comprises direct-connected communication channel quality, resource utilization.
5. the method for direct-connected communication between terminal in wireless network communications system according to claim 1, is characterized in that: if a terminal take part in multiple direct-connected communication scenes, then this terminal can to the multiple measurement statistical information of base station feedback.
6. the method for direct-connected communication between terminal in wireless network communications system according to claim 1, it is characterized in that: described direct-connected communication is divided into controlled mode and free schema, the direct-connected communication of terminal room is the communication pattern towards non-link, does not require to keep connection status between terminal and wireless base station.
7. the method for direct-connected communication between terminal in wireless network communications system according to claim 6, is characterized in that: when realizing the direct-connected communication of controlled mode in LTE system, and the direct-connected communication resource is LTE ascending time slot resource, wherein,
Server is that in direct-connected communication scenes, all authorized terminals send resource allocation message, and wherein, described resource allocation message is encrypted NAS message;
Server sends signaling to base station, and for direct-connected communication scenes reserves ascending time slot resource, wherein, the content in reserved time interval resource and NAS message is consistent;
Server chooses the interim instruction of D-RNTI as wireless network; NAS message is carried on PDSCH by base station, and sends to terminal authorized in set of terminal; The PDSCH resource of carrying NAS message is indicated by PDCCH, and PDCCH is identified by D-RNTI;
Terminal detects the PDCCH of D-RNTI mark, obtains the PDSCH resource mapping information of NAS message, and recycling private key is decoded to NAS message, obtains the resource information that set of terminal is authorized.
8. the method for direct-connected communication between terminal in wireless network communications system according to claim 6, is characterized in that: when realizing the direct-connected communication of free schema in LTE system, and the direct-connected communication resource is LTE ascending time slot resource, wherein,
The direct-connected communication resource of server-assignment; Direct-connected communication resource information, with the pattern of system broadcast message, is broadcasted by base station in community;
Terminal receives the direct-connected communication resource and assigns broadcast, and adopts the mode that the direct-connected communication resource is competed, and carries out the direct-connected communication between terminal and terminal.
9. the method for direct-connected communication between terminal in wireless network communications system according to claim 1, is characterized in that: under direct-connected communication scenes, the method for Resourse Distribute comprises:
Data receiver is measured the operable direct-connected communication resource, will meet the resource information alternatively resource information of quality requirement, in random access guiding response message, send to data sending terminal;
Data sending terminal is measured the operable direct-connected communication resource, according to measurement result, screens candidate resource, and the resource information filtered out is sent to data receiver in data sending request message;
The resource that data receiver filters out according to data sending terminal, in data sending request response message, sends the direct-connected communication resource of data transmission to data sending terminal.
10. the method for direct-connected communication between terminal in wireless network communications system according to claim 1, it is characterized in that: when realizing the direct-connected communication between terminal in LTE system, the direct-connected communication resource is LTE ascending time slot resource, and carrier frequency is LTE system up channel carrier frequency; Wherein,
Data sending terminal carries out following operation:
Data sending terminal sends random access guiding in Random Access Channel;
Data sending terminal is after sending random access guiding, and in window, wait for random access guiding response instruction, random access guiding response is designated as the PUCCH of RA-RNTI mark, and window size is configured by LTE system;
If data sending terminal detects random access guiding response instruction in wait window, then indicate according to random access guiding response the PUSCH resource identified, receive random access guiding response, otherwise, after waiting for certain interval, again send random access guiding;
The PUSCH of data sending terminal represented by random access guiding response instruction, carrying random access guiding response message, receives random access guiding response data, and judges whether following condition is set up:
A, data sending terminal are successfully decoded random access guiding response data packet;
B, random access guiding mark is consistent with the random access guiding sent before data sending terminal;
C, data receiver authentication are passed through;
The data that d, data receiver distribute send resource and meet the requirements;
The temporary identifications that e, data receiver distribute to data sending terminal meets the requirements;
If condition is set up, the PUSCH resource distribution of data sending terminal indicated by random access guiding response, sends the instruction of data sending request message and data sending request message; If be false, then after certain interval of time, continue to send random access guiding;
Data sending terminal, after transmission data sending request message, waits for that in window the PUCCH message that C-RNTI indicates, PUCCH message are data sending request response instruction; If receive data sending request response instruction, according to the PUSCH resource mapping rule entrained by data sending request response instruction, receive data sending request response message; If do not receive data sending request response instruction in window, so after certain interval of time, again send random access guiding;
The PUSCH resource that data sending terminal distributes according to data sending request response message and time interval resource, send data;
Data receiver comprises following operation:
Data receiver sends rule according to the predefined random access guiding of LTE system, detects random access guiding;
After data receiver correctly detects random access guiding, identify PUCCH with RA-RNTI, send random access guiding response instruction, and indicate the PUSCH channel identified to send random access guiding response message in response;
After data receiver sends random access guiding response, the data sending request instruction of data sending terminal is detected in window, if receive the data sending request instruction of data sending terminal, according to the PUSCH channel information entrained by the data sending request Indication message of data sending terminal, receive data sending request message, and according to data sending request message content, send data sending request response to data sending terminal; Otherwise flow process terminates;
Data receiver receives the data that data sending terminal sends on the PUSCH channel resource distributed.
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