CN104902579B - In a kind of wireless network communications system between terminal direct-connected communication method - Google Patents
In a kind of wireless network communications system between terminal direct-connected communication method Download PDFInfo
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- CN104902579B CN104902579B CN201310648075.6A CN201310648075A CN104902579B CN 104902579 B CN104902579 B CN 104902579B CN 201310648075 A CN201310648075 A CN 201310648075A CN 104902579 B CN104902579 B CN 104902579B
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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
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Abstract
The present invention provides a kind of method of direct-connected communication between terminal in wireless network communications system, comprising: server is the direct-connected communication resource of terminal assignments being authorized in direct-connected communication scenes；According to the direct-connected communication resource of appointment, the terminal in set of terminal carries out the direct-connected communication between terminal and terminal；Have in set of terminal established between base station two-way link ability part terminal can to server feedback measure statistical information；Direct communication measurement statistical information and current system conditions of the server according to feedback, adjustresources appointment.In wireless network communications system of the invention between terminal direct-connected communication method, avoid consumption of the connection-oriented communication process to electric power；And time-multiplexed mode is used, it is compatible with existing wireless communications system；System time gap resource used in the direct-connected communication of terminal room simultaneously is configured by the server being arranged, and server can adjust distributing slot resources, improve resource utilization ratio according to measurement statistical information.
Description
Technical field
The present invention relates to the technical field of wireless communication, in particular in a kind of wireless network communications system terminal it
Between direct-connected communication method.
Background technique
In wireless network communications system, the direct-connected communication technology of the low-power consumption of terminal room is typical case with Bluetooth technology.Bluetooth
It is a kind of radio technology of short haul connection (in general 10m) between holding equipment, can is including mobile phone, PDA, wireless ear
Wireless messages exchange is carried out between numerous equipment such as machine, laptop, related peripherals.It can be effectively simple using Bluetooth technology
Change the communication between mobile communication terminal device, also can successfully simplify the communication between equipment and internet, so that
Data transmission becomes more efficient rapidly, has widened road for wireless communication.Bluetooth is using distributed network structure and fast jump
Frequency and short packet technology support point-to-point and point-to-multipoint delivery, work in the 2.4GHz industry of global general-use, science, medicine
(Industrial Scientific Medical, ISM) frequency range, data rate 1Mbps, and use time division duplex transmission
Scheme realizes full duplex transmission.
With the development of technology of Internet of things, the low-power consumption direct communication and data interaction technology between terminal and terminal are more next
More it is taken seriously.The characteristic feature of Internet of Things application scenarios, which is limited in region, assembles a large amount of equipment.It is estimated that 2020
Year, in typical Internet of Things application scenarios, the quantity of every square kilometre of InterWorking Equipment will be more than 400,000.Therefore, bluetooth skill at that time
Art cannot deal with this application scenarios.
For traditional wireless communication technique, under the control of wireless base station, the communication between terminal and terminal passes through nothing
The data relay of gauze network realizes the data interaction between terminal and terminal.The primary goal of wireless communication technique is to provide one
The wireless network of the seamless coverage of wide area.For the continuity of the data communication of guarantee terminal room, mobile terminal will be with certain
Frequency executes various measurements and the information exchange between wireless base station, and needs to keep connecting with wireless base station in communication process
Connect state.However, this process will cause the consumption of terminal electric power, the Internet of Things interconnection for not adapting to low-power consumption is required.
But traditional wireless communication technique, have the characteristics that controllable and capacity is big, communication frequency is the proprietary frequency of authorization
Spectrum, interference level are in controllable state.How the characteristics of two kinds of communication technologys, to be combined, a kind of controllable large capacity is provided
Low-power consumption direct-connecting technology becomes current hot research topic.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide in a kind of wireless network communications system
The method of direct-connected communication between terminal, can be compatible with existing mobile radio communication network, the load for the consideration system that can be integrated,
The Capability Requirement of transmission bandwidth and terminal.
In order to achieve the above objects and other related objects, the present invention is provided in a kind of wireless network communications system between terminal
The method of direct-connected communication, includes at least: server is the direct-connected communication resource of terminal assignments being authorized in direct-connected communication scenes；Its
In the direct-connected communication resource be time interval resource；According to the direct-connected communication resource of appointment, the terminal in set of terminal carries out terminal and terminal
Between direct-connected communication；Have in set of terminal the part terminal of two-way link ability is established between base station can be anti-to server
Feedback measurement statistical information；Server refers to according to the direct communication measurement statistical information and current system conditions of feedback, adjustresources
Group.
According in above-mentioned wireless network communications system between terminal direct-connected communication method, in which: only authorized
Terminal the direct-connected communication resource and direct-connected information could be decoded；All authorized terminals can in direct-connected communication scenes
Receive the resource assign that direct-connected communication scenes are identified.
According in above-mentioned wireless network communications system between terminal direct-connected communication method, in which: direct-connected communication is made
Carrier frequency is the uplink carrier frequencies of system.
According in above-mentioned wireless network communications system between terminal direct-connected communication method, in which: measurement statistics
Information includes including direct-connected communication channel quality, resource utilization.
According in above-mentioned wireless network communications system between terminal direct-connected communication method, in which: if a terminal
Multiple direct-connected communication scenes are taken part in, then the terminal can be to the multiple measurement statistical informations of base station feedback.
According in above-mentioned wireless network communications system between terminal direct-connected communication method, in which: the direct-connected communication
It 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 terminal and nothing
Line keeps connection status between base station.
Further, according in above-mentioned wireless network communications system between terminal direct-connected communication method, in which:
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 all authorized terminals send resource allocation message in direct-connected communication scenes, wherein the resource
Assignment messages are encrypted NAS message；
Server sends signaling to base station, reserves ascending time slot resource for direct-connected communication scenes, wherein reserved time slot money
Source is consistent with the content in NAS message；
Server chooses interim instruction of the D-RNTI as wireless network；NAS message is carried on PDSCH by base station, and
It is sent to the terminal being authorized in set of terminal；The PDSCH resource of carrying NAS message is indicated that PDCCH is marked by D-RNTI by PDCCH
Know；
Terminal detects the PDCCH of D-RNTI mark, obtains the PDSCH resource impact information of NAS message, recycles private key pair
NAS message is decoded, and obtains the authorized resource information of set of terminal.
Further, according in above-mentioned wireless network communications system between terminal direct-connected communication method, in which:
When realizing the direct-connected communication of free schema in LTE system, the direct-connected communication resource is LTE ascending time slot resource, wherein
Server distributes the direct-connected communication resource；Base station is existed direct-connected communication resource information with the mode of system broadcast message
It is broadcasted in cell；
Terminal receives the direct-connected communication resource and assigns broadcast message, and by the way of the competition of the direct-connected communication resource, carries out eventually
Direct-connected communication between end and terminal.
According in above-mentioned wireless network communications system between terminal direct-connected communication method, in which: direct-connected communication scenes
The method of lower resource allocation includes:
Data receiver measures the direct-connected communication resource that can be used, and the resource information for meeting quality requirement is made
For candidate resource information, data sending terminal is sent in random access preamble response message；
Data sending terminal measures the direct-connected communication resource that can be used, according to measurement result, to candidate resource into
Row screening, is sent to data receiver in data sending request message for the resource information filtered out；
The resource that data receiver is filtered out according to data sending terminal gives data in data sending request response message
Transmitting terminal sends the direct-connected communication resource that data are sent.
According in above-mentioned wireless network communications system between terminal direct-connected communication method, in which: it is real in LTE system
When showing the direct-connected communication between terminal, the direct-connected communication resource is LTE ascending time slot resource, and carrier frequency is LTE system up channel load
Frequently；Wherein,
Data sending terminal performs the following operation:
Data sending terminal sends random access preamble in random access channel；
Data sending terminal waits random access preamble response instruction after having sent random access preamble in window, with
The response of machine access lead is designated as the PUCCH of RA-RNTI mark, and window size is configured by LTE system；
If data sending terminal detects random access preamble response instruction in waiting window, according to random access preamble
Response indicates identified PUSCH resource, receives random access preamble response, otherwise, after waiting certain interval, sends out again
Send random access preamble；
The data sending terminal PUSCH represented according to random access preamble response instruction, carrying random access preamble response
Message receives random access preamble response data, and judges whether following condition is true:
A, random access preamble response data packet is successfully decoded in data sending terminal；
B, random access preamble mark and the random access preamble of data sending terminal sent before are consistent；
C, data receiver authentication passes through；
D, the data of data receiver distribution send resource and meet the requirements；
E, the temporary identifications that data receiver is distributed to data sending terminal meet the requirements；
If condition is set up, the data sending terminal PUSCH resource distribution indicated in random access preamble response sends number
Request message is sent according to request message instruction and data are sent；If invalid, after certain interval of time, continue to send random
Access lead；
Data sending terminal waits the PUCCH message of C-RNTI instruction after sending data sending request message in window,
PUCCH message is data sending request response instruction；If receiving data sending request response instruction, asked according to data transmission
The PUSCH resource impact rule that response instruction is entrained is sought, data sending request response message is received；If do not had in window
Data sending request response instruction is received, then sending random access preamble again after certain interval of time；
The PUSCH resource and time interval resource that data sending terminal is distributed according to data sending request response message, send number
According to；
Data receiver includes following operation:
Data receiver sends rule according to LTE system random access preamble predetermined, detects random access preamble；
After data receiver is correctly detecting random access preamble, PUCCH is identified with RA-RNTI, before sending random access
Response instruction is led, and indicates that identified PUSCH channel sends random access preamble response message in response；
After data receiver has sent random access preamble response, the data of detection data transmitting terminal are sent in window
Request instruction, if the data sending request instruction of data sending terminal is received, according to the data sending request of data sending terminal
PUSCH channel information entrained by instruction message receives data sending request message, and according in data sending request message
Hold, sends data sending request response to data sending terminal；Otherwise process terminates；
Data receiver receives the data of data sending terminal transmission on allocated PUSCH channel resource.
As described above, in wireless network communications system of the invention between terminal direct-connected communication method, having following has
Beneficial effect:
(1) in the direct-connected communication process between terminal and terminal, keeping connection status with wireless base station is not one necessary
The condition to be had, the direct-connected communication process between terminal and terminal are a disconnected communication process, can to avoid towards
Consumption of the communication process of connection to electric power；
(2) the direct-connected communication between terminal and terminal and the communication between terminal and base station, using time-multiplexed mode,
It is coexisted among a system, is compatible with existing wireless communications system；
(3) system time gap resource used in direct-connected communication between terminal and terminal is configured, service by the server being arranged
Device can adjust distributing slot resources, improve resource utilization ratio according to measurement statistical information.
Detailed description of the invention
Fig. 1 is shown as in the present invention process schematic of direct-connected communication between terminal in wireless network communications system；
Multiple Intra-cells that Fig. 2 is shown as in the present invention under controlled mode affix one's name to the process signal of identical direct-connected communication scenes
Figure；
Multiple Intra-cells that Fig. 3 is shown as in the present invention under controlled mode affix one's name to the process signal of identical direct-connected communication scenes
Figure；
Fig. 4 is shown as in the present invention process schematic of direct-connected communication between terminal and terminal under free schema
Fig. 5 is shown as the flow chart of the direct-connected communication of terminal room based on competition and handshake method in the present invention；
Fig. 6 is shown as in the present invention resource allocation negotiation flow chart under direct-connected communication scenes；
Fig. 7 is shown as realizing the schematic diagram of the direct-connected communication of controlled mode in the present invention in LTE system.
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.
It should be noted that the basic conception that only the invention is illustrated in a schematic way is illustrated provided in the present embodiment,
Then only shown in schema with it is of the invention in related component rather than component count, shape and size when according to actual implementation draw
System, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind, and its assembly layout kenel can also
It can be increasingly complex.
The present invention realizes the direct-connected communication mould of terminal room by time-multiplexed mode in existing wireless communication system
Formula.Direct-connected communication pattern is divided into controlled mode and free schema.Under controlled mode, one kind can be provided for authorized terminal
Guarantee the direct-connected communication service of quality., can be as needed by operator under free schema, it is all in wireless coverage area
Terminal provides the public direct-connected communication service that non-mass guarantees.The direct-connected communication of terminal room is a kind of communication towards non-link
Mode does not require to keep connection status between terminal and wireless base station.
Referring to Fig. 1, the method for direct-connected communication includes: between terminal in wireless network communications system of the invention
Server is the direct-connected communication resource of terminal assignments being authorized in direct-connected communication scenes, wherein resource assign is with straight
Connection believes scene identity D2DcaseID to be identified.There are 2 groups of terminals to carry out direct-connected communication, respectively scene in Fig. 1
D2DCaseIDA and D2DCaseID B, region shown in region and pecked line shown in dotted line indicates respectively.Only authorized
Terminal the direct-connected communication resource and direct-connected information could be decoded.Wherein, the direct-connected communication resource is time interval resource.
All authorized terminals can receive direct-connected communication scenes D2DCaseID and be identified in set of terminal in cell
Resource assign.According to the direct-connected communication resource of appointment, the terminal in set of terminal carries out the direct-connected communication between terminal and terminal.
In set of terminal, part terminal has the ability that two-way link is established between base station.These terminals can be to service
Device Y feedback measurement statistical information, including direct-connected communication channel quality, resource utilization.Measurement statistical information terminal is participated in
Direct-connected communication scenes D2DCaseID be identified.If a terminal takes part in multiple direct-connected communication scenes, terminal
It can be identified respectively with D2DCaseID to the multiple measurement statistical informations of base station feedback.
Server Y, according to the direct communication measurement statistical information and current system conditions of feedback, adjustresources are assigned.
Embodiment one
Fig. 2 and Fig. 3 are please referred to, the present embodiment is that multiple Intra-cells under controlled mode affix one's name to identical direct-connected communication scenes
Process.Wherein, base station A and base station B respectively corresponds two cell Cell A and Cell B.In direct-connected communication scenes D2DCaseX
Authorization terminal is distributed in Cell A and Cell B.Server assigns the resource of the D2DCaseX of Cell A and Cell B to refer to respectively
Send ResourceAllotA and ResourceAllotB.Authorization terminal in D2DCaseX, according to leading for Cell A and Cell B
The intensity and quality of frequency signal determine that the cell being resident is Cell A and Cell B.The D2DCaseX resided in Cell is whole
End, using the resource assign of current area, carries out direct-connected communication.
Embodiment two
Referring to Fig. 4, the present embodiment is direct-connected communication process between terminal and terminal under free schema.Wherein, it is servicing
Under the control of device, the public direct-connected communication resource is broadcasted in base station in cell.Terminal receives time interval resource and assigns in persistent district
Broadcast message.Terminal carries out the direct-connected communication between terminal and terminal by the way of resource contention.
Embodiment three
Referring to Fig. 5, the present embodiment be based on competition and handshake method the direct-connected communication of terminal room method, transmitting terminal and
All information of interaction between receiving end, are all carried on the direct-connected communication resource being assigned in cell.Specifically include following step
It is rapid:
Step 1, data sending terminal send random access preamble in the random access channel in the direct-connected communication resource, hair
After having sent random access preamble, the random access preamble response of monitored data receiving end refers in a pre-set window
Show.
Step 2, data receiver monitor random access preamble on a random access channel, leading ring to what is listened to
It answers, leading response includes following content:
A, random access preamble response instruction, sends in the control channel in the direct-connected communication resource, by predetermined
Code is scrambled, the resource impact of instruction random access preamble response data packet on a traffic channel；
B, random access preamble response data packet, comprising: random access preamble mark, the data receiver identity received
Resource allocation and data sending terminal temporary identifications workable for mark, transmitting terminal channel；
C, the mode transmission that random access preamble response data packet can choose with encryption.
If step 3, data sending terminal listen to the random access of data receiver in a pre-set window
Leading response instruction, then indicate identified traffic channel resource according to leading response, receive random access preamble response data,
And judge whether following content is true:
A, random access preamble response data packet is successfully decoded in data sending terminal；
B, random access preamble mark and the random access preamble mark of data sending terminal sent before are consistent；
C, data receiver authentication passes through；
D, the data of data receiver distribution send resource and meet the requirements；
E, the temporary identifications that data receiver is distributed to data sending terminal meet the requirements.
If all judgements are all set up, step 4 is executed, otherwise according to rule predetermined, when being spaced one section
Between after, retransmit random access preamble.
Step 4, data sending terminal send data in special control channel, send request message instruction, send message
The control channel of instruction.Wherein, control channel is scrambled by data sending terminal temporary identifications.Data sending request message
It is carried on data sending request message and indicates on identified traffic channel resource that data sending request message includes:
A, data sending terminal identification information；
B, terminal sends the type identification of data；
C, Information Security mark is sent；
D, workable candidate resource；
E, data volume size；
F, the mode transmission that data packet can choose with encryption.
After step 5, data receiver have sent random access preamble response message, in a preset window
Interior, monitoring data send request message instruction, execute following decision operation:
A, the message bearing resource corresponding according to the instruction of data sending request message, is successfully decoded data sending request and disappears
Breath；
B, the identity of transmitting terminal is identified, confirmation transmitting terminal identity information meets the requirements；
C, verification Information Security mark, which meets, asks；
D, verification data type identifier, which closes, requires；
E, resource can be sent for data sending terminal；
If all operation judgements are all successful, 6 are thened follow the steps, otherwise process terminates.
Step 6, data receiver respond the data sending request message of data sending terminal, send request of data and ring
It should indicate to be carried on the special control letter in the direct-connected communication resource with data request response data packet, request of data response instruction
On road, the temporary identity ID that control channel is assigned by data sending terminal is identified, and response message includes following content:
A, receiving end identity；
B, data send resource allocation；
C, data send the resource repetition period；
D, the mode transmission that data packet can choose with encryption.
After step 7, data sending terminal have sent data sending request message, in a preset window, monitoring
The instruction of data sending request response message, executes following decision operation:
A, receiving end identity is verified；
B, resource allocation is verified.
After all operations judgement is all successful, data are sent in the resource of distribution.
Step 8, data sending terminal send data in the resource of distribution.
If step 9, data sending terminal need to send out after sending data for the last time in assigned resource there are also data
It send, in the resource request flag position 1 of data packet head, incidentally upper data sending request message starts after data packet transmission
Window is waited, if receiving the response message of receiving end in window phase, then continuing to send number according to newly assigned resource
According to.Otherwise it is re-executed since step 1.
Step 10, data receiver respond new data sending request message.
Step 11, data sending terminal send data in newly assigned resource.
Example IV
Referring to Fig. 6, the present embodiment is the method for resource allocation negotiation under direct-connected communication scenes, the present embodiment includes following
Content:
Data receiver measures the direct-connected communication resource that can be used, and will meet the resource information of quality requirement
As candidate resource information, data sending terminal is sent in random access preamble response message；
Data sending terminal measures the direct-connected communication resource that can be used, according to measurement result, to candidate resource into
Row screening, the resource information that will be filtered out are sent to data receiver in data sending request message；
The resource that data receiver is filtered out according to data sending terminal gives data in data sending request response message
Transmitting terminal sends the time interval resource that data are sent.
Embodiment five
Referring to Fig. 7, the present embodiment is the method for realizing the direct-connected communication of controlled mode in LTE system.Wherein: direct-connected communication
Resource is LTE ascending time slot resource.Specifically includes the following steps:
Server is all authorized terminals in D2DCase group, sends resource allocation message through base station.Resource allocation disappears
Breath is encrypted Non-Access Stratum (Non Access Stratum, NAS) data packet.
Server sends signaling to base station, reserves ascending time slot resource, reserved time interval resource and resource for D2DCase group
Content in distribution NAS message is consistent.
A value is chosen from reserved RNTI FFF4~FFFC, referred to as D-RNTI temporarily refers to as wireless network D2D
Show.
Base station by NAS message, be carried on Physical Downlink Shared Channel (Physical Downlink Shared Chanel,
PDSCH on), it is sent to the terminal being authorized in D2DCase group.
The PDSCH resource for carrying NAS message, by Physical Downlink Control Channel (Physical Downlink Control
Chanel, PDCCH) it indicates, PDCCH is identified by D-RNTI.
Terminal detects the PDCCH channel of D-RNTI mark, obtains the PDSCH resource impact information of NAS message.
Terminal utilizes private key, is decoded to NAS message, obtains the authorized resource information of D2DCase group.
Embodiment six
The present embodiment is the method that the direct-connected communication of free schema is realized in LTE system, and the present embodiment includes the following contents:
Server distributes the direct-connected communication resource of free schema；Base station is provided direct-connected communication with the mode of system broadcast message
Source information is broadcasted in cell.Terminal receives time interval resource and assigns broadcast message in persistent district.Terminal uses resource
The mode of competition 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 for realizing direct-connected communication in LTE system between terminal, it is assumed that terminal is according to five He of embodiment
Six, have learned that the available direct-connected communication resource, all operations are carried in assigned LTE ascending time slot resource operation
Frequency is LTE system up channel carrier frequency.
Wherein, data sending terminal includes following operation:
1, data sending terminal sends random access preamble in random access channel.
2, data sending terminal waits random access preamble response to refer to after having sent random access preamble in window
Show, random access preamble response is designated as Physical Uplink Control Channel (the Physical Uplink of RA-RNTI mark
Control Chanel, PUCCH), window size is configured by LTE system.
If 3, data sending terminal detects random access preamble response instruction in waiting window, according to random
Access lead response indicates identified Physical Uplink Shared Channel (Physical Uplink Shared Chanel, PUSCH)
Resource receives random access preamble response, otherwise, after waiting certain interval, sends random access preamble again.
4, the data sending terminal PUSCH channel bearing random access preamble represented according to random access preamble response instruction
Response message executes the relevant operation of step 3 in example IV.If judgement passes through, step 5 is executed, when being otherwise spaced one section
Between after, continue send random access preamble.
5, the data sending terminal PUSCH resource distribution indicated in random access preamble response, sends data sending request
Message instruction and data send request message, wherein
A, data sending request message is designated as the interim wireless network of C-RNTI(that data sending terminal is data receiver distribution
The instruction of network identity) mark PUCCH, the information carried in PUCCH be to carry the PUSCH resource of data sending request message to believe
Breath；
B, data sending request message include: data sending terminal identification information, terminal send data type identification,
Send Information Security mark, workable candidate resource and data volume size.
6, data sending terminal waits the PUCCH of C-RNTI instruction to disappear after sending data sending request message in window
Breath, this message are data sending request response instruction；If receiving response instruction, entrained PUSCH is indicated according to response
Resource impact rule, receives data sending request response message, and window size is configured by LTE system.If do not had in window
Response instruction is received, then sending random access preamble again after certain interval of time.
7, the PUSCH resource and time interval resource that data sending terminal is distributed according to data sending request response message, send
Data.
Data receiver includes following operation:
1, data receiver sends rule according to LTE system random access preamble predetermined, before detecting random access
It leads.
2, after data receiver is correctly detecting random access preamble, PUCCH is identified with RA-RNTI, sends random access
Leading response instruction, and indicate that identified PUSCH channel sends random access preamble response message, leading response in response
Message includes:
A, the random access preamble mark received；
B, data receiver identity；
C, resource allocation workable for transmitting terminal channel；
D, data sending terminal temporary identifications C-RNTI.
3, after data receiver has sent random access preamble response, the data hair of detection data transmitting terminal in window
It send request to indicate, if receiving the data sending request instruction of data sending terminal, executes step 4, otherwise process terminates.
4, data receiver PUSCH channel according to entrained by the data sending request instruction message of data sending terminal is believed
Breath receives data sending request message, according to message content, sends data sending request response to data sending terminal.
5, data receiver receives the data of data sending terminal transmission on allocated PUSCH channel resource.
In conclusion in wireless network communications system of the invention between terminal in the method for direct-connected communication, terminal and end
Direct-connected communication process between end is a disconnected communication process, can be to avoid connection-oriented communication process to electric power
Consumption；Direct-connected communication between terminal and terminal and the communication between terminal and base station, using time-multiplexed mode, at one
It is coexisted among system, is compatible with existing wireless communications system；System time gap used in direct-connected communication provides between terminal and terminal
Source is configured by the server being arranged, and server can adjust distributing slot resources according to measurement statistical information, improves system money
Source utilization rate.So the present invention effectively overcomes various shortcoming in the prior art and has high industrial utilization value.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (7)
1. in a kind of wireless network communications system between terminal direct-connected communication method, which is characterized in that include at least:
Server is the direct-connected communication resource of terminal assignments being authorized in direct-connected communication scenes；Wherein the direct-connected communication resource is time slot
Resource；
According to the direct-connected communication resource of appointment, the terminal in set of terminal carries out the direct-connected communication between terminal and terminal；
Have in set of terminal established between base station two-way link ability part terminal can to server feedback measure count
Information；
Direct communication measurement statistical information and current system conditions of the server according to feedback, adjustresources appointment；
The direct-connected communication is divided into controlled mode and free schema, and the direct-connected communication of terminal room is the communication mould towards non-link
Formula does not require to keep connection status between terminal and wireless base station；
When realizing the direct-connected communication of controlled mode in LTE system, the direct-connected communication resource is LTE ascending time slot resource, wherein clothes
Device of being engaged in is that all authorized terminals send resource allocation messages in direct-connected communication scenes, wherein the resource allocation message is
Encrypted NAS message；Server sends signaling to base station, reserves ascending time slot resource for direct-connected communication scenes, wherein reserved
Time interval resource and NAS message in content be consistent；Server chooses interim instruction of the D-RNTI as wireless network；Base
It stands and NAS message is carried on PDSCH, and be sent to the terminal being authorized in set of terminal；Carry the PDSCH resource of NAS message
It is indicated by PDCCH, PDCCH is identified by D-RNTI；Terminal detects the PDCCH of D-RNTI mark, obtains the PDSCH money of NAS message
Source map information recycles private key to be decoded NAS message, obtains the authorized resource information of set of terminal；
When realizing the direct-connected communication of free schema in LTE system, the direct-connected communication resource is LTE ascending time slot resource, wherein clothes
Business device distributes the direct-connected communication resource；Base station is carried out direct-connected communication resource information with the mode of system broadcast message in cell
Broadcast；Terminal receives the direct-connected communication resource and assigns broadcast message, and using the competition of the direct-connected communication resource by the way of, carry out terminal with
Direct-connected communication between terminal.
2. in wireless network communications system according to claim 1 between terminal direct-connected communication method, it is characterised in that:
The terminal for only obtaining authorization could be decoded the direct-connected communication resource and direct-connected information；It is all in direct-connected communication scenes to be awarded
The terminal of power can receive the resource assign that direct-connected communication scenes are identified.
3. in wireless network communications system according to claim 1 between terminal direct-connected communication method, it is characterised in that:
Carrier frequency used in direct-connected communication is the uplink carrier frequencies of system.
4. in wireless network communications system according to claim 1 between terminal direct-connected communication method, it is characterised in that:
The measurement statistical information includes direct-connected communication channel quality, resource utilization.
5. in wireless network communications system according to claim 1 between terminal direct-connected communication method, it is characterised in that:
If a terminal takes part in multiple direct-connected communication scenes, which can be to the multiple measurement statistical informations of base station feedback.
6. in wireless network communications system according to claim 1 between terminal direct-connected communication method, it is characterised in that:
The method of resource allocation includes: under direct-connected communication scenes
Data receiver measures the direct-connected communication resource that can be used, and will meet the resource information of quality requirement as time
Resource information is selected, is sent to data sending terminal in random access preamble response message；
Data sending terminal measures the direct-connected communication resource that can be used, and according to measurement result, sieves to candidate resource
Choosing, is sent to data receiver in data sending request message for the resource information filtered out；
The resource that data receiver is filtered out according to data sending terminal is sent in data sending request response message to data
End sends the direct-connected communication resource that data are sent.
7. in wireless network communications system according to claim 1 between terminal direct-connected communication method, it is characterised 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
System up channel carrier frequency；Wherein,
Data sending terminal performs the following operation:
Data sending terminal sends random access preamble in random access channel；
Data sending terminal waits random access preamble response instruction in window, connects at random after having sent random access preamble
Enter the PUCCH that leading response is designated as RA-RNTI mark, window size is configured by LTE system；
If data sending terminal detects random access preamble response instruction in waiting window, responded according to random access preamble
Indicate identified PUSCH resource, receive random access preamble response, otherwise, after waiting certain interval, send again with
Machine access lead；
Data sending terminal indicates identified PUSCH according to random access preamble response, carries random access preamble response message,
Random access preamble response data is received, and judges whether following condition is true:
A, random access preamble response data packet is successfully decoded in data sending terminal；
B, random access preamble mark and the random access preamble of data sending terminal sent before are consistent；
C, data receiver authentication passes through；
D, the data of data receiver distribution send resource and meet the requirements；
E, the temporary identifications that data receiver is distributed to data sending terminal meet the requirements；
If condition is set up, the data sending terminal PUSCH resource distribution indicated in random access preamble response sends data hair
Request message instruction and data is sent to send request message；If invalid, after certain interval of time, continue to send random access
It is leading；
Data sending terminal waits the PUCCH message of C-RNTI instruction after sending data sending request message in window,
PUCCH message is data sending request response instruction；If receiving data sending request response instruction, asked according to data transmission
The PUSCH resource impact rule that response instruction is entrained is sought, data sending request response message is received；If do not had in window
Data sending request response instruction is received, then sending random access preamble again after certain interval of time；
The PUSCH resource and time interval resource that data sending terminal is distributed according to data sending request response message, send data；
Data receiver includes following operation:
Data receiver sends rule according to LTE system random access preamble predetermined, detects random access preamble；
After data receiver is correctly detecting random access preamble, PUCCH is identified with RA-RNTI, random access preamble is sent and rings
It should indicate, and indicate that identified PUSCH channel sends random access preamble response message in response；
After data receiver has sent random access preamble response, the data sending request of detection data transmitting terminal in window
Instruction indicates if receiving the data sending request instruction of data sending terminal according to the data sending request of data sending terminal
PUSCH channel information entrained by message receives data sending request message, and according to data sending request message content, gives
Data sending terminal sends data sending request response；Otherwise process terminates；
Data receiver receives the data of data sending terminal transmission on allocated PUSCH channel resource.
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