CN102695262B - Authorization method and system for realizing direct communication among terminals - Google Patents
Authorization method and system for realizing direct communication among terminals Download PDFInfo
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- CN102695262B CN102695262B CN201110069382.XA CN201110069382A CN102695262B CN 102695262 B CN102695262 B CN 102695262B CN 201110069382 A CN201110069382 A CN 201110069382A CN 102695262 B CN102695262 B CN 102695262B
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Abstract
The invention discloses an authorization method and a system for realizing direct communication among terminals. An access point conducts scheduling control to the terminals in scheduling including launching timing relationship and a same authorization. And each terminal, according to the scheduling control of the access point, communicates directly with each other instead of through the access point. The method and system of the invention relate to a connection method, a communication authorization, an authorization method and a timing relationship, enabling the terminals to communicate directly under the scheduling control of the access point.
Description
Technical field
The present invention relates to the communications field, and in particular to realize awarding for direction communication between terminal (MT) based on access point (AP)
Power method and system.
Background technology
According to the regulation of 3G (Third Generation) Moblie partner program (3GPP), directly can not lead between terminal and terminal
Letter, can not be forwarded by base station, and can only be by the packet-based core networks (EPC) of evolution.
At present, after base station sends the mandate of uplink scheduling to terminal, terminal is after K Transmission Time Interval (TTI)
Physical Uplink Shared Channel could be launched.Wherein K is the integer not less than 4.It can be seen, time delay is authorized (from sending
Time difference to coming into force) than larger, for application this to direction communication between the terminal and terminal of delay sensitive, time delay seems
It is slightly larger.
At present, base station sends the mandate of uplink scheduling just for single terminal end to terminal, not for the up of multiple terminals
Scheduling authorization.Between terminal and terminal in this application of direction communication, except carry out mandate will to the terminal for sending data
Outward, in addition it is also necessary to authorized to the terminal of receiving data so that the terminal of receiving data can feed back whether be properly received data.But
There presently does not exist correlation technical support, therefore Long Term Evolution (LTE) network there is no method support terminal between with it is less when
Prolonging carries out direct reliable communication.
The content of the invention
In view of this, present invention is primarily targeted at provide it is a kind of realize between terminal the authorization method of direction communication and
System, to ensure that terminal can direction communication under the scheduling controlling of access point.
To reach above-mentioned purpose, the technical scheme is that what is be achieved in that：
A kind of authorization method for realizing direction communication between terminal, the method include：
Access point is carried out to terminal including transmitting timing relationship and with the scheduling controlling including a mandate；Each terminal root
According to the scheduling controlling of access point, the direction communication without access point is carried out each other.
The special subframe in frame structure involved during the direction communication is carried out, by the scheduling controlling of access point
Become the subframe of direction communication between terminal.
The terminal iidentification of each terminal for including participating in direction communication with a content for authorizing.
Source mobile terminal and destination mobile terminal for participating in direction communication, the timing relationship include：
Launch to source mobile terminal from access point and authorize the timing relationship that data are sent to source mobile terminal；
Launch to destination mobile terminal from access point and authorize the reception number sent to destination mobile terminal for direction communication
According to confirmation timing relationship.
In the timing relationship of confirmation is related to,
When there is two special subframes in a radio frames, the timing relationship is：Confirmation difference is transmitted into from data
5ms；
When there is a special subframe in a radio frames, the timing relationship is：Confirmation difference is transmitted into from data
10ms。
The method is further included：Appoint the communications setting of direction communication between terminal before a communication in advance；
The communications setting includes at least one of：Data block size, modulation system, coded system, running time-frequency resource, day
Line is configured.
A kind of authoring system for realizing direction communication between terminal, the system include access point and at least two terminals；
Wherein,
Described access point, for carrying out to terminal including transmitting timing relationship and with the scheduling control including a mandate
System；
The terminal, for the scheduling controlling according to access point, is carried out among each other without the directly logical of access point
Letter.
Described access point, specifically for：By scheduling controlling, when will carry out the direction communication in involved frame structure
Special subframe, formed terminal between direction communication subframe.
The terminal iidentification of each terminal for including participating in direction communication with a content for authorizing.
Source mobile terminal and destination mobile terminal for participating in direction communication, the timing relationship include：
Launch to source mobile terminal from access point and authorize the timing relationship that data are sent to source mobile terminal；
Launch to destination mobile terminal from access point and authorize the reception number sent to destination mobile terminal for direction communication
According to confirmation timing relationship.
In the timing relationship of confirmation is related to,
When there is two special subframes in a radio frames, the timing relationship is：Confirmation difference is transmitted into from data
5ms；
When there is a special subframe in a radio frames, the timing relationship is：Confirmation difference is transmitted into from data
10ms。
The inventive method and system are related to method of attachment, Communications Authorization, authorization method, sequential relationship so that terminal is connecing
Can direction communication under the scheduling controlling of access point.
Description of the drawings
Wireless communication system architecture figures of the Fig. 1 for the embodiment of the present invention；
Frame structure schematic diagrams of the Fig. 2 for frame structure type 2 defined in 3GPP；
Fig. 3 is the sequential relationship schematic diagram for being transmitted into confirmation in up-downgoing 1 time direction communication of proportioning from data；
Fig. 4 is the sequential relationship schematic diagram for being transmitted into confirmation in up-downgoing 4 times direction communications of proportioning from data；
The general flow charts of realizing terminal between direction communication of the Fig. 5 for the embodiment of the present invention.
Specific embodiment
In actual applications, wireless communication system of the invention includes connected mode between following network element, network element, communication
Mandate, authorization method, sequential relationship：
The wireless communication system includes an access point.
The wireless communication system at least includes two mobile terminals.
Connected by air wireless interface between mobile terminal and access point.The frame structure of radio-interface physical layer is used
Frame structure type 2 defined in 3GPP TS36.211-a00, as shown in Figure 2.
As can be seen from Figure 2, the time span of a radio frames is 10 milliseconds, and 10 are divided into 10 subframes, each subframe when
Between length be 1 millisecond.Wherein, a subframe (that is, first subframe) of foremost is that conventional descending sub frame (is labeled as son
Frame #0)；Second subframe is special subframe (being labeled as subframe #1).Special subframe includes 3 parts：Part I is descending pilot frequency
Time slot (DwPTS), Part II are protection interval (GP), and Part III is uplink pilot time slot (UpPTS).
According to 3GPP TS36.211-a00, in up-downgoing proportioning 0,1,2,6, the 7th subframe (being labeled as subframe #6)
And special subframe.Its structure is completely the same with second subframe (special subframe).
Special subframe in the above-mentioned frame structure of the wireless communication system can be become by the scheduling controlling of access point
The subframe of direction communication between terminal.Between terminal during direction communication, the data between them need not move through access point.
For launching data to source mobile terminal, protection interval part does not have for the descending pilot frequency time slot part of above-mentioned special subframe
There is a transmitting of any signal, uplink pilot time slot part is for giving destination mobile terminal transmitting confirmation.
When the wireless communication system is configured with access point, a multiple mobile terminals, can access between mobile terminal
Direction communication under the scheduling controlling of point.
The scheduling controlling of access point includes access point to source mobile terminal and destination mobile terminal transmitting with a mandate.Award
The content of power includes the terminal iidentification of the terminal iidentification and destination mobile terminal of source mobile terminal.
The scheduling controlling of access point also includes that access point is authorized to the transmitting of source mobile terminal and sends data to source mobile terminal
Timing relationship.Source mobile terminal sends data to be carried out in the descending pilot frequency time slot of special subframe, and access point sends scheduling and awards
Power is carried out in the upper one conventional descending sub frame close to special subframe.
The scheduling controlling of access point also includes authorizing destination mobile terminal to send out to destination mobile terminal transmitting from access point
Go out the timing relationship of the confirmation of receiving data for direction communication.Confirmation be after scheduling authorization is received most
What the uplink pilot time slot of close next special subframe sent.
Of course, it is possible to appoint the communications setting of direction communication between terminal before a communication in advance；The communications setting
Including at least one of：Data block size, modulation system, coded system, running time-frequency resource, antenna configurations.
By said method, mobile terminal under control of access point, can carry out direction communication.
Specific embodiment one：
Below in conjunction with the accompanying drawings the preferred embodiment of technical scheme is described in further detail.
This embodiment describes its system by taking up-downgoing proportioning 1 (as shown in Figure 3) as an example and constructs and operating process：
The wireless communication system of the present invention includes an access point.
The wireless communication system includes two mobile terminals.
Connected by air wireless interface between mobile terminal and access point.The frame structure of radio-interface physical layer is used
Frame structure type 2 defined in 3GPP TS36.211-a00, as shown in Figure 2.
Special subframe in the above-mentioned frame structure of the wireless communication system can be become by the scheduling controlling of access point
The subframe of direction communication between terminal.Between terminal during direction communication, the data between them need not move through access point.
For launching data to source mobile terminal, protection interval part does not have for the descending pilot frequency time slot part of above-mentioned special subframe
There is a transmitting of any signal, uplink pilot time slot part is for giving destination mobile terminal transmitting confirmation.
When the wireless communication system is configured with an access point, two mobile terminals, can access between mobile terminal
Direction communication under the scheduling controlling of point.
The scheduling controlling of access point includes access point to source mobile terminal and destination mobile terminal transmitting with a mandate.Award
The content of power includes the terminal iidentification of the terminal iidentification and destination mobile terminal of source mobile terminal.
The scheduling controlling of access point also includes from access point authorizing to the transmitting of source mobile terminal sending number to source mobile terminal
According to timing relationship.Source mobile terminal sends data to be carried out in the descending pilot frequency time slot of special subframe, and access point sends tune
Degree is authorized to be carried out in the upper one conventional descending sub frame close to special subframe.As shown in figure 3, scheduling authorization is in a nothing
The conventional descending sub frame transmitting of first of line frame.It is in the descending pilot frequency of first special subframe that source mobile terminal sends data
Gap is launched.
The scheduling controlling of access point also includes authorizing destination mobile terminal to send out to destination mobile terminal transmitting from access point
Go out the timing relationship of the confirmation of receiving data for direction communication.Confirmation be after scheduling authorization is received most
The uplink pilot time slot of close next special subframe sends.As shown in figure 3, scheduling authorization is the first of a radio frames
Individual conventional descending sub frame transmitting.It is the uplink pilot time slot in second special subframe that destination mobile terminal sends confirmation
Penetrate.
The data block size of direction communication, modulation system, coded system, running time-frequency resource, antenna configurations etc. between terminal,
Appointed in advance before communication.
By said method, mobile terminal under control of access point, can carry out direction communication.
It can be seen that, method of attachment, Communications Authorization, authorization method, sequential relationship involved by the present embodiment etc. so that terminal exists
Can direction communication under the scheduling controlling of access point.Also, the time difference for being transmitted into confirmation from data is 5ms.As shown in Figure 3.
Specific embodiment two：
This embodiment describes its system by taking up-downgoing proportioning 4 (as shown in Figure 4) as an example and constructs and operating process：
The wireless communication system of the present invention includes an access point.
The wireless communication system includes two mobile terminals.
Connected by air wireless interface between mobile terminal and access point.The frame structure of radio-interface physical layer is used
Frame structure type 2 defined in 3GPP TS36.211-a00, as shown in Figure 2.
Special subframe in the above-mentioned frame structure of the wireless communication system can be become by the scheduling controlling of access point
The subframe of direction communication between terminal.Between terminal during direction communication, the data between them need not move through access point.
For launching data to source mobile terminal, protection interval part does not have for the descending pilot frequency time slot part of above-mentioned special subframe
There is a transmitting of any signal, uplink pilot time slot part is for giving destination mobile terminal transmitting confirmation.
When the wireless communication system is configured with an access point, two mobile terminals, can access between mobile terminal
Direction communication under the scheduling controlling of point.
The scheduling controlling of access point includes access point to source mobile terminal and destination mobile terminal transmitting with a mandate.Award
The content of power includes the terminal iidentification of the terminal iidentification and destination mobile terminal of source mobile terminal.
The scheduling controlling of access point also includes from access point authorizing to the transmitting of source mobile terminal sending number to source mobile terminal
According to timing relationship.Source mobile terminal sends data to be carried out in the descending pilot frequency time slot of special subframe, and access point sends tune
Degree is authorized to be carried out in the upper one conventional descending sub frame close to special subframe.As shown in figure 4, scheduling authorization is in a nothing
The conventional descending sub frame transmitting of first of line frame.It is the descending pilot frequency time slot in special subframe that source mobile terminal sends data
Penetrate.
The scheduling controlling of access point also includes authorizing destination mobile terminal to send out to destination mobile terminal transmitting from access point
Go out the timing relationship of the confirmation of receiving data for direction communication.Confirmation be after scheduling authorization is received most
The uplink pilot time slot of close next special subframe sends.As shown in figure 4, scheduling authorization is the first of a radio frames
Individual conventional descending sub frame transmitting.Destination mobile terminal sends confirmation is led in the up of special subframe of next radio frames
Frequency slot transmission.
The data block size of direction communication, modulation system, coded system, running time-frequency resource, antenna configurations etc. between terminal,
Appointed in advance before communication.
By said method, mobile terminal under control of access point, can carry out direction communication.
It can be seen that, method of attachment, Communications Authorization, authorization method, sequential relationship involved by the present embodiment etc. so that terminal exists
Can direction communication under the scheduling controlling of access point.Also, the time difference for being transmitted into confirmation from data is 10ms.As shown in Figure 4.
Specific embodiment three：
This embodiment with up-downgoing proportioning 1 (as shown in Figure 3), have two source mobile terminals while giving the movement of target
Terminal transmission data instance, describes its system and constructs and operating process：
The wireless communication system of the present invention includes an access point.
The wireless communication system includes three mobile terminals.
Connected by air wireless interface between mobile terminal and access point.The frame structure of radio-interface physical layer is used
Frame structure type 2 defined in 3GPP TS36.211-a00, as shown in Figure 2.
Special subframe in the above-mentioned frame structure of the wireless communication system can be become by the scheduling controlling of access point
The subframe of direction communication between terminal.Between terminal during direction communication, the data between them need not move through access point.
For launching data to source mobile terminal, protection interval part does not have for the descending pilot frequency time slot part of above-mentioned special subframe
There is a transmitting of any signal, uplink pilot time slot part is for giving destination mobile terminal transmitting confirmation.
When the wireless communication system is configured with an access point, three mobile terminals, can access between mobile terminal
Direction communication under the scheduling controlling of point.
The scheduling controlling of access point includes access point to source mobile terminal and destination mobile terminal transmitting with a mandate.Award
The content of power includes the terminal iidentification of the terminal iidentification and destination mobile terminal of source mobile terminal.In the present embodiment, there are two
Source mobile terminal launches data to simultaneously a destination mobile terminal, therefore has the terminal iidentification of two source mobile terminals.
The scheduling controlling of access point also includes from access point authorizing to the transmitting of source mobile terminal sending number to source mobile terminal
According to timing relationship.Source mobile terminal sends data to be carried out in the descending pilot frequency time slot of special subframe, and access point sends scheduling
Mandate is carried out in the upper one conventional descending sub frame close to special subframe.As shown in figure 3, scheduling authorization is in a radio frames
First conventional descending sub frame transmitting.It is the descending pilot frequency time slot in first special subframe that source mobile terminal sends data
Penetrate.
The scheduling controlling of access point also includes authorizing destination mobile terminal to send out to destination mobile terminal transmitting from access point
Go out the timing relationship of the confirmation of receiving data for direction communication.Confirmation be after scheduling authorization is received most
The uplink pilot time slot of close next special subframe sends.As shown in figure 3, scheduling authorization is the first of a radio frames
Individual conventional descending sub frame transmitting.It is the uplink pilot time slot in second special subframe that destination mobile terminal sends confirmation
Penetrate.
The data block size of direction communication, modulation system, coded system, running time-frequency resource, antenna configurations etc. between terminal,
Appointed in advance before communication.In the present embodiment, two source mobile terminals respectively account for the running time-frequency resource of half.
By said method, mobile terminal under control of access point, can carry out direction communication.
It can be seen that, method of attachment, Communications Authorization, authorization method, sequential relationship involved by the present embodiment etc. so that terminal exists
Multi-party communication can be directly carried out under the scheduling controlling of access point.Also, the time difference for being transmitted into confirmation from data is 5ms.Such as Fig. 3 institutes
Show.
It should be noted that above-described wireless communication system includes an access point and two or three movements eventually
End, simply illustrates.In actual applications, depending on the quantity of access point and mobile terminal is according to practical situation, as long as connecing
Access point transmitting same a authorization control under, can realize between each terminal Content of Communication without access point direction communication i.e.
Can.
It is visible with reference to various embodiments above, realize that the Authorized operation thinking of direction communication between terminal can be represented such as Fig. 5
Shown flow process, the flow process are comprised the following steps：
Step 510：Access point is carried out to terminal including transmitting timing relationship and with the scheduling controlling including a mandate.
Step 520：Scheduling controlling of each terminal according to access point, is carried out each other without the directly logical of access point
Letter.
Visible in sum, either method or system, the present invention realize the authorization technique of direction communication between terminal
It is related to method of attachment, Communications Authorization, authorization method, sequential relationship so that terminal directly can be led under the scheduling controlling of access point
Letter.
The above, only presently preferred embodiments of the present invention is not intended to limit protection scope of the present invention.
Claims (11)
1. a kind of authorization method for realizing direction communication between terminal, it is characterised in that the method includes：
Access point is carried out to mobile terminal including transmitting timing relationship and with the scheduling controlling including a mandate；It is each mobile whole
The scheduling controlling according to access point is held, the direction communication without access point is carried out each other；
Source mobile terminal and destination mobile terminal for participating in direction communication, the timing relationship include：
Launch to source mobile terminal from access point and authorize the timing relationship that data are sent to source mobile terminal.
2. method according to claim 1, it is characterised in that carry out in frame structure involved during the direction communication
Special subframe, becomes the subframe of direction communication between mobile terminal by the scheduling controlling of access point.
3. method according to claim 1 and 2, it is characterised in that described to include participating in direct with a content for authorizing
The terminal iidentification of each mobile terminal of communication.
4. method according to claim 1 and 2, it is characterised in that the source mobile terminal and mesh for participating in direction communication
Mark mobile terminal, the timing relationship also include：
Launch mandate to destination mobile terminal from access point and the receiving data for direction communication is sent to destination mobile terminal
The timing relationship of confirmation.
5. method according to claim 4, it is characterised in that in the timing relationship of confirmation is related to,
When there is two special subframes in a radio frames, the timing relationship is：Confirmation difference 5ms is transmitted into from data；
When there is a special subframe in a radio frames, the timing relationship is：Confirmation difference 10ms is transmitted into from data.
6. method according to claim 1 and 2, it is characterised in that the method is further included：Before a communication in advance about
Set the communications setting of direction communication between mobile terminal；
The communications setting includes at least one of：Data block size, modulation system, coded system, running time-frequency resource, antenna are matched somebody with somebody
Put.
7. a kind of authoring system for realizing direction communication between terminal, it is characterised in that the system includes access point and at least
Two mobile terminals；Wherein,
Described access point, for carrying out to mobile terminal including transmitting timing relationship and with the scheduling control including a mandate
System；
The mobile terminal, for the scheduling controlling according to access point, is carried out among each other without the directly logical of access point
Letter；
Source mobile terminal and destination mobile terminal for participating in direction communication, the timing relationship include：
Launch to source mobile terminal from access point and authorize the timing relationship that data are sent to source mobile terminal.
8. system according to claim 7, it is characterised in that described access point, specifically for：By scheduling controlling, will
The special subframe in frame structure involved during the direction communication is carried out, the subframe of direction communication between mobile terminal is formed.
9. the system according to claim 7 or 8, it is characterised in that described to include participating in direct with a content for authorizing
The terminal iidentification of each mobile terminal of communication.
10. the system according to claim 7 or 8, it is characterised in that the source mobile terminal and mesh for participating in direction communication
Mark mobile terminal, the timing relationship also include：
Launch mandate to destination mobile terminal from access point and the receiving data for direction communication is sent to destination mobile terminal
The timing relationship of confirmation.
11. systems according to claim 10, it is characterised in that in the timing relationship of confirmation is related to,
When there is two special subframes in a radio frames, the timing relationship is：Confirmation difference 5ms is transmitted into from data；
When there is a special subframe in a radio frames, the timing relationship is：Confirmation difference 10ms is transmitted into from data.
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| CN201110069382.XA CN102695262B (en) | 2011-03-22 | 2011-03-22 | Authorization method and system for realizing direct communication among terminals |
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