CN102685912A - Method and system for implementing direct communication between terminals - Google Patents
Method and system for implementing direct communication between terminals Download PDFInfo
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- CN102685912A CN102685912A CN2011100654083A CN201110065408A CN102685912A CN 102685912 A CN102685912 A CN 102685912A CN 2011100654083 A CN2011100654083 A CN 2011100654083A CN 201110065408 A CN201110065408 A CN 201110065408A CN 102685912 A CN102685912 A CN 102685912A
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Abstract
The invention discloses a method and system for implementing direct communication between terminals. An access point controls the direct communication between the terminals; and the direct communication between the terminals is implemented without passing through the access point according to the control of the access point. The method and the system relate to a communication system, a network element connection mode, time slot matching, a timing relation and an operation flow, so that the direct communication between the terminals can be implemented under the scheduling control of the access point.
Description
Technical Field
The invention relates to the field of communication, in particular to a method and a system for realizing direct communication between terminals (MT) based on an Access Point (AP).
Background
According to the protocol of the third generation partnership project (3GPP), direct communication between terminals and forwarding through a base station are not possible, but only through the Evolved Packet Core (EPC).
In order to enable a Long Term Evolution (LTE) network to support direct communication between terminals, a wireless communication technology needs to be provided, but at present, no corresponding specific technology support exists.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a method and a system for implementing direct communication between terminals, so as to ensure that the terminals can directly communicate under the scheduling control of an access point.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method for implementing direct communication between terminals, the method comprising: the access point controls the direct communication of the terminal; the terminals are controlled by the access point to carry out direct communication without passing through the access point;
the access point and the terminal communicate by using a wireless interface applying a frame structure of time division duplex-long term evolution (TDD-LTE);
the special subframe in the frame structure supporting the direct communication becomes a subframe for the direct communication between the terminals through the scheduling control of the access point; the downlink pilot time slot part of the special sub-frame is used for transmitting data to the source mobile terminal, the guard interval part does not have any signal transmission, and the uplink pilot time slot part is used for transmitting confirmation information to the target mobile terminal.
The control is realized by the access point performing centralized scheduling on the terminal;
the frame structure of the time division duplex-long term evolution TDD-LTE is a type 2 frame structure specified by TS36.211 protocol of the third generation partnership project.
A target terminal identification for a target mobile terminal in direct communication with the source mobile terminal,
when the target terminal identification is a terminal identification reserved for broadcasting, the application times and the sending data quantity do not exceed a preset threshold value;
when the target terminal identification is not a terminal identification reserved for broadcasting, the existence of a timing relationship is confirmed from data transmission.
When there are two special subframes in a radio frame, the timing relationship is: the difference between data transmission and confirmation is 5 ms;
when there is a special subframe in a radio frame, the timing relationship is: there is a 10ms difference from data transmission to acknowledgement.
The control of the direct communication is realized by sending direct communication authorization to the mobile terminal through the access point;
aiming at a source mobile terminal, an access point sends authorization for direct communication to the source mobile terminal, and aims at time-frequency resources and space resources of the next nearest special subframe;
for the target mobile terminal, when the access point sends the resource authorization for the target mobile terminal when the uplink pilot frequency time slot part is used for transmitting the confirmation information to the target mobile terminal, the access point authorizes the resource when the uplink pilot frequency time slot part of the latest special subframe transmits the confirmation information after receiving the data of the source mobile terminal;
the subframe in which the access point transmits the grant is a normal subframe and not a special subframe.
The authorization for the source mobile terminal and the authorization for the target mobile terminal are issued simultaneously.
A system for realizing direct communication between terminals comprises an access point and at least two terminals; wherein,
the access point is used for controlling the direct communication of the terminal;
the terminal is used for carrying out direct communication without passing through the access point among the terminals according to the control of the access point;
the special subframe in the frame structure supporting the direct communication becomes a subframe for the direct communication between the terminals through the scheduling control of the access point; the downlink pilot time slot part of the special sub-frame is used for transmitting data to the source mobile terminal, the guard interval part does not have any signal transmission, and the uplink pilot time slot part is used for transmitting confirmation information to the target mobile terminal.
When performing the communication control, the access point is specifically configured to: carrying out centralized scheduling on the terminals;
and the access point and the terminal communicate with each other through a wireless interface using a TDD-LTE frame structure.
A target terminal identification for a target mobile terminal in direct communication with the source mobile terminal,
when the target terminal identification is a terminal identification reserved for broadcasting, the application times and the sending data quantity do not exceed a preset threshold value;
when the target terminal identification is not a terminal identification reserved for broadcasting, the existence of a timing relationship is confirmed from data transmission.
When there are two special subframes in a radio frame, the timing relationship is: the difference between data transmission and confirmation is 5 ms;
when there is a special subframe in a radio frame, the timing relationship is: there is a 10ms difference from data transmission to acknowledgement.
The control of the direct communication is realized by sending direct communication authorization to the mobile terminal through the access point;
aiming at a source mobile terminal, an access point sends authorization for direct communication to the source mobile terminal, and aims at time-frequency resources and space resources of the next nearest special subframe;
for the target mobile terminal, when the access point sends the resource authorization for the target mobile terminal when the uplink pilot frequency time slot part is used for transmitting the confirmation information to the target mobile terminal, the access point authorizes the resource when the uplink pilot frequency time slot part of the latest special subframe transmits the confirmation information after receiving the data of the source mobile terminal;
the subframe in which the access point transmits the grant is a normal subframe and not a special subframe.
The authorization for the source mobile terminal and the authorization for the target mobile terminal are issued simultaneously.
The method and the system of the invention relate to a communication system, a network element connection mode, a time slot ratio, a timing relation and an operation flow, so that a terminal can directly communicate under the scheduling control of an access point.
Drawings
Fig. 1 is a block diagram of a wireless communication system according to an embodiment of the present invention;
fig. 2 is a frame structure diagram of frame structure type 2 defined by 3 GPP;
fig. 3 is a schematic diagram of the timing relationship from data transmission to acknowledgement in direct communication at uplink and downlink configuration 1;
fig. 4 is a schematic diagram of the timing relationship from data transmission to acknowledgement in direct communication at uplink and downlink configuration 4;
fig. 5 is a simplified flowchart of implementing direct communication between terminals according to an embodiment of the present invention.
Detailed Description
In practical applications, the wireless communication system of the present invention comprises an access point.
The wireless communication system includes at least two mobile terminals.
The mobile terminal is connected to the access point via an air radio interface. The frame structure of the physical layer of the radio interface uses frame structure type 2 as defined by 3GPP TS36.211-a 00.
The special subframe in the above-described frame structure of the wireless communication system can be a subframe for direct communication between terminals by scheduling control of the access point. When terminals communicate directly with each other, data between them need not pass through the access point.
The downlink pilot time slot (DwPTS) part of the special subframe is used to transmit data to the source mobile terminal, the guard interval (GP) part is not transmitted with any signal, and the uplink pilot time slot (UpPTS) part is used to transmit acknowledgement information to the target mobile terminal.
When the wireless communication system is configured with one access point and a plurality of mobile terminals, the mobile terminals can directly communicate with each other under the scheduling control of the access point.
The direct communication flow between mobile terminals is as follows.
In the first step, a source mobile terminal applies for direct communication authorization to an access point. Including its own terminal identification, target terminal identification, sending data volume. The target terminal identification may be a terminal identification reserved for broadcasting.
And secondly, the access point checks the legality of the source mobile terminal identification, the target terminal identification and the data volume sending. When the target terminal identifier is a terminal identifier reserved for broadcasting, both the number of applications and the amount of transmitted data within a period of time cannot exceed a certain size (e.g., a preset threshold value). If both are legal, go to the third step, otherwise go to the seventh step.
And thirdly, the access point sends authorization for direct communication to the source mobile terminal. The grant is for the time-frequency and space resources of the next most recent special subframe. The subframe in which the access point transmits the grant is a normal downlink subframe and is not a special subframe.
Fourthly, the access point sends the resource authorization to the target mobile terminal when the uplink pilot time slot part is used for transmitting the confirmation information to the target mobile terminal. The grant is directed to resources when the acknowledgment information is transmitted in the uplink pilot timeslot portion of the latest special sub-frame after the data of the source mobile terminal is received. The subframe in which the access point transmits the grant is a normal downlink subframe and is not a special subframe. When the target terminal identity is the terminal identity reserved for broadcasting, this step jumps directly to the fifth step without any action.
And fifthly, the source mobile terminal transmits data in the authorized downlink pilot frequency time slot part.
And sixthly, the target mobile terminal transmits confirmation information in the authorized uplink pilot frequency time slot part. When the target terminal identity is the terminal identity reserved for broadcasting, this step jumps directly to the seventh step without any action.
And step seven, ending the process.
The first embodiment is as follows:
preferred embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
In this embodiment, the system configuration and operation flow are described by taking the uplink and downlink configuration 1 (as shown in fig. 3), the source mobile terminal identifier, the target terminal identifier, and the sending data volume are all legal, and the terminal identifiers are all identifiers for non-broadcast as examples:
the wireless communication system of the present invention includes an access point.
The wireless communication system includes two mobile terminals.
The mobile terminal is connected to the access point via an air radio interface. The frame structure of the physical layer of the radio interface uses frame structure type 2 defined by 3GPP TS36.211-a00, as shown in fig. 2.
The special subframe in the above-described frame structure of the wireless communication system can be a subframe for direct communication between terminals by scheduling control of the access point. When terminals communicate directly with each other, data between them need not pass through the access point.
The downlink pilot slot part of the special sub-frame is used to transmit data to the source mobile terminal (MT1), the guard interval part is used without any signal transmission, and the uplink pilot slot part is used to transmit acknowledgement information to the target mobile terminal (MT 2).
When the wireless communication system is configured with one access point and a plurality of mobile terminals, the mobile terminals can directly communicate with each other under the scheduling control of the access point.
The direct communication flow between the mobile terminals is as follows:
in the first step, a source mobile terminal applies for direct communication authorization to an access point. Including its own terminal identification, target terminal identification, sending data volume. The target terminal identification may be a terminal identification reserved for broadcasting.
And secondly, the access point checks the legality of the source mobile terminal identification, the target terminal identification and the data volume sending. When the target terminal identifier is a terminal identifier reserved for broadcasting, both the number of applications and the amount of transmitted data within a period of time cannot exceed a certain size (e.g., a preset threshold value). If both are legal, go to the third step, otherwise go to the seventh step. Since this example assumes that all are legal, go to the third step.
And thirdly, the access point sends authorization for direct communication to the source mobile terminal. The grant is for the time-frequency and space resources of the next most recent special subframe. The subframe in which the access point transmits the grant is a normal downlink subframe and is not a special subframe. This example assumes that the grant is transmitted in the D subframe immediately preceding S.
Fourthly, the access point sends the resource authorization to the target mobile terminal when the uplink pilot time slot part is used for transmitting the confirmation information to the target mobile terminal. The grant is directed to resources when the acknowledgment information is transmitted in the uplink pilot timeslot portion of the latest special sub-frame after the data of the source mobile terminal is received. The subframe in which the access point transmits the grant is a normal downlink subframe and is not a special subframe. When the target terminal identity is the terminal identity reserved for broadcasting, this step jumps directly to the fifth step without any action. This step requires operation since the terminal identification is not an identification for broadcasting.
And fifthly, the source mobile terminal transmits data in the authorized downlink pilot frequency time slot part. As shown in fig. 3.
And sixthly, the target mobile terminal transmits confirmation information in the authorized uplink pilot frequency time slot part. When the target terminal identity is the terminal identity reserved for broadcasting, this step jumps directly to the seventh step without any action. Since the terminal id is a non-broadcast id, this step needs to operate and transmit acknowledgement information on the UpPTS of the next most recent S subframe. As shown in fig. 3.
And step seven, ending the process.
Therefore, the communication system, the network element connection mode, the time slot ratio, the timing relation and the operation flow provided by the invention enable the terminal to directly communicate under the scheduling control of the access point. The time difference from data transmission to acknowledgement is 5 ms. As shown in fig. 3.
The second embodiment is as follows:
in this embodiment, the system configuration and operation flow are described by taking the uplink and downlink ratio 4 (as shown in fig. 4), the source mobile terminal identifier, the target terminal identifier, and the sending data volume are all legal, and the terminal identifiers are all identifiers for non-broadcast as examples:
the wireless communication system of the present invention includes an access point.
The wireless communication system includes two mobile terminals.
The mobile terminal is connected to the access point via an air radio interface. The frame structure of the physical layer of the radio interface uses frame structure type 2 defined by 3GPP TS36.211-a00, as shown in fig. 2.
The special subframe in the above-described frame structure of the wireless communication system can be a subframe for direct communication between terminals by scheduling control of the access point. When terminals communicate directly with each other, data between them need not pass through the access point.
The downlink pilot slot part of the special sub-frame is used to transmit data to the source mobile terminal (MT1), the guard interval part is used without any signal transmission, and the uplink pilot slot part is used to transmit acknowledgement information to the target mobile terminal (MT 2).
When the wireless communication system is configured with one access point and a plurality of mobile terminals, the mobile terminals can directly communicate with each other under the scheduling control of the access point.
The direct communication flow between the mobile terminals is as follows:
in the first step, a source mobile terminal applies for direct communication authorization to an access point. Including its own terminal identification, target terminal identification, sending data volume. The target terminal identification may be a terminal identification reserved for broadcasting.
And secondly, the access point checks the legality of the source mobile terminal identification, the target terminal identification and the data volume sending. When the target terminal identifier is a terminal identifier reserved for broadcasting, both the number of applications and the amount of transmitted data within a period of time cannot exceed a certain size (e.g., a preset threshold value). If both are legal, go to the third step, otherwise go to the seventh step. Since this example assumes that all are legal, go to the third step.
And thirdly, the access point sends authorization for direct communication to the source mobile terminal. The grant is for the time-frequency and space resources of the next most recent special subframe. The subframe in which the access point transmits the grant is a normal downlink subframe and is not a special subframe. This example assumes that the grant is transmitted in the D subframe immediately preceding S.
Fourthly, the access point sends the resource authorization to the target mobile terminal when the uplink pilot time slot part is used for transmitting the confirmation information to the target mobile terminal. The grant is directed to resources when the acknowledgment information is transmitted in the uplink pilot timeslot portion of the latest special sub-frame after the data of the source mobile terminal is received. The subframe in which the access point transmits the grant is a normal downlink subframe and is not a special subframe. When the target terminal identity is the terminal identity reserved for broadcasting, this step jumps directly to the fifth step without any action. This step requires operation since the terminal identifiers are all non-broadcast identifiers.
And fifthly, the source mobile terminal transmits data in the authorized downlink pilot frequency time slot part. As shown in fig. 4.
And sixthly, the target mobile terminal transmits confirmation information in the authorized uplink pilot frequency time slot part. When the target terminal identity is the terminal identity reserved for broadcasting, this step jumps directly to the seventh step without any action. Since the terminal id is a non-broadcast id, this step needs to be performed and the acknowledgement information is transmitted on the UpPTS of the next latest S subframe. As shown in fig. 4.
And step seven, ending the process.
Therefore, the communication system, the network element connection mode, the time slot ratio, the timing relation and the operation flow provided by the invention enable the terminal to directly communicate under the scheduling control of the access point. The time difference from data transmission to acknowledgement is 10 ms. As shown in fig. 4.
The third concrete embodiment:
in this embodiment, the system configuration and operation flow are described by taking the uplink and downlink configuration 1 (as shown in fig. 3), the source mobile terminal identifier, the target terminal identifier, and the transmission data volume are all legal, and the source terminal identifier is an identifier for non-broadcast and the target terminal identifier is an identifier for broadcast as an example:
the wireless communication system of the present invention includes an access point.
The wireless communication system includes two mobile terminals.
The mobile terminal is connected to the access point via an air radio interface. The frame structure of the physical layer of the radio interface uses frame structure type 2 defined by 3GPP TS36.211-a00, as shown in fig. 2.
The special subframe in the above-described frame structure of the wireless communication system can be a subframe for direct communication between terminals by scheduling control of the access point. When terminals communicate directly with each other, data between them need not pass through the access point.
The downlink pilot slot part of the special sub-frame is used to transmit data to the source mobile terminal (MT1), the guard interval part is used without any signal transmission, and the uplink pilot slot part is used to transmit acknowledgement information to the target mobile terminal (MT 2).
When the wireless communication system is configured with one access point and a plurality of mobile terminals, the mobile terminals can directly communicate with each other under the scheduling control of the access point.
The direct communication flow between the mobile terminals is as follows:
in the first step, a source mobile terminal applies for direct communication authorization to an access point. Including its own terminal identification, target terminal identification, sending data volume. The target terminal identification may be a terminal identification reserved for broadcasting.
And secondly, the access point checks the legality of the source mobile terminal identification, the target terminal identification and the data volume sending. When the target terminal identifier is a terminal identifier reserved for broadcasting, both the number of applications and the amount of transmitted data within a period of time cannot exceed a certain size (e.g., a preset threshold value). If both are legal, go to the third step, otherwise go to the seventh step. Since this example assumes that all are legal, go to the third step.
And thirdly, the access point sends authorization for direct communication to the source mobile terminal. The grant is for the time-frequency and space resources of the next most recent special subframe. The subframe in which the access point transmits the grant is a normal downlink subframe and is not a special subframe. This example assumes that the grant is transmitted in the D subframe immediately preceding S.
Fourthly, the access point sends the resource authorization to the target mobile terminal when the uplink pilot time slot part is used for transmitting the confirmation information to the target mobile terminal. The grant is directed to resources when the acknowledgment information is transmitted in the uplink pilot timeslot portion of the latest special sub-frame after the data of the source mobile terminal is received. The subframe in which the access point transmits the grant is a normal downlink subframe and is not a special subframe. When the target terminal identity is the terminal identity reserved for broadcasting, this step jumps directly to the fifth step without any action. The target terminal identification is the identification for broadcasting, so the step has no operation and directly jumps to the fifth step.
And fifthly, the source mobile terminal transmits data in the authorized downlink pilot frequency time slot part. As shown in fig. 3.
And sixthly, the target mobile terminal transmits confirmation information in the authorized uplink pilot frequency time slot part. When the target terminal identity is the terminal identity reserved for broadcasting, this step jumps directly to the seventh step without any action. Since the target terminal identifier is an identifier for broadcasting, the step is not operated and directly jumps to the seventh step.
And step seven, ending the process.
As can be seen from the above, the wireless interface between the access point and the terminal uses the frame structure of Time Division Duplex (TDD) -LTE.
It should be noted that the wireless communication system described above includes one access point and two mobile terminals, which are only examples. In practical applications, the number of the access points and the number of the mobile terminals are determined according to practical situations, and only under the control of the access points, direct communication of communication contents without passing through the access points can be realized among the terminals.
As can be seen from the foregoing embodiments, the operation idea of implementing direct communication between terminals can be represented as a flow shown in fig. 5, where the flow includes the following steps:
step 510: the access point controls the direct communication of the terminal.
Step 520: the terminals perform direct communication with each other without passing through the access point according to the control of the access point.
In summary, the technology for implementing direct communication between terminals in the present invention relates to a communication system, a network element connection mode, a time slot ratio, a timing relationship and an operation flow, so that the terminals can directly communicate under the scheduling control of an access point, regardless of the method or the system.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (12)
1. A method for implementing direct communication between terminals, the method comprising: the access point controls the direct communication of the terminal; the terminals are controlled by the access point to carry out direct communication without passing through the access point;
the access point and the terminal communicate by using a wireless interface applying a frame structure of time division duplex-long term evolution (TDD-LTE);
the special subframe in the frame structure supporting the direct communication becomes a subframe for the direct communication between the terminals through the scheduling control of the access point; the downlink pilot time slot part of the special sub-frame is used for transmitting data to the source mobile terminal, the guard interval part does not have any signal transmission, and the uplink pilot time slot part is used for transmitting confirmation information to the target mobile terminal.
2. The method of claim 1,
the control is realized by the access point performing centralized scheduling on the terminal;
the frame structure of the time division duplex-long term evolution TDD-LTE is a type 2 frame structure specified by TS36.211 protocol of the third generation partnership project.
3. The method of claim 1, wherein a target terminal identification for a target mobile terminal in direct communication with the source mobile terminal,
when the target terminal identification is a terminal identification reserved for broadcasting, the application times and the sending data quantity do not exceed a preset threshold value;
when the target terminal identification is not a terminal identification reserved for broadcasting, the existence of a timing relationship is confirmed from data transmission.
4. The method of claim 3,
when there are two special subframes in a radio frame, the timing relationship is: the difference between data transmission and confirmation is 5 ms;
when there is a special subframe in a radio frame, the timing relationship is: there is a 10ms difference from data transmission to acknowledgement.
5. The method according to any of claims 1 to 4, wherein the control of the direct communication is achieved by the access point sending an authorization for the direct communication to the mobile terminal;
aiming at a source mobile terminal, an access point sends authorization for direct communication to the source mobile terminal, and aims at time-frequency resources and space resources of the next nearest special subframe;
for the target mobile terminal, when the access point sends the resource authorization for the target mobile terminal when the uplink pilot frequency time slot part is used for transmitting the confirmation information to the target mobile terminal, the access point authorizes the resource when the uplink pilot frequency time slot part of the latest special subframe transmits the confirmation information after receiving the data of the source mobile terminal;
the subframe in which the access point transmits the grant is a normal subframe and not a special subframe.
6. The method of claim 5, wherein the authorization for the source mobile terminal and the authorization for the target mobile terminal are issued simultaneously.
7. A system for enabling direct communication between terminals, the system comprising an access point and at least two terminals; wherein,
the access point is used for controlling the direct communication of the terminal;
the terminal is used for carrying out direct communication without passing through the access point among the terminals according to the control of the access point;
the special subframe in the frame structure supporting the direct communication becomes a subframe for the direct communication between the terminals through the scheduling control of the access point; the downlink pilot time slot part of the special sub-frame is used for transmitting data to the source mobile terminal, the guard interval part does not have any signal transmission, and the uplink pilot time slot part is used for transmitting confirmation information to the target mobile terminal.
8. The system of claim 7,
when performing the communication control, the access point is specifically configured to: carrying out centralized scheduling on the terminals;
and the access point and the terminal communicate with each other through a wireless interface using a TDD-LTE frame structure.
9. The system of claim 7, wherein a target terminal identification for a target mobile terminal in direct communication with the source mobile terminal,
when the target terminal identification is a terminal identification reserved for broadcasting, the application times and the sending data quantity do not exceed a preset threshold value;
when the target terminal identification is not a terminal identification reserved for broadcasting, the existence of a timing relationship is confirmed from data transmission.
10. The system of claim 9,
when there are two special subframes in a radio frame, the timing relationship is: the difference between data transmission and confirmation is 5 ms;
when there is a special subframe in a radio frame, the timing relationship is: there is a 10ms difference from data transmission to acknowledgement.
11. The system according to any of claims 7 to 10, wherein the control of the direct communication is achieved by the access point sending an authorization for the direct communication to the mobile terminal;
aiming at a source mobile terminal, an access point sends authorization for direct communication to the source mobile terminal, and aims at time-frequency resources and space resources of the next nearest special subframe;
for the target mobile terminal, when the access point sends the resource authorization for the target mobile terminal when the uplink pilot frequency time slot part is used for transmitting the confirmation information to the target mobile terminal, the access point authorizes the resource when the uplink pilot frequency time slot part of the latest special subframe transmits the confirmation information after receiving the data of the source mobile terminal;
the subframe in which the access point transmits the grant is a normal subframe and not a special subframe.
12. The system of claim 11, wherein the authorization for the source mobile terminal and the authorization for the target mobile terminal are issued simultaneously.
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| CN201110065408.3A CN102685912B (en) | 2011-03-17 | 2011-03-17 | Realize the method and system of direction communication between terminal |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104717633A (en) * | 2013-12-11 | 2015-06-17 | 普天信息技术研究院有限公司 | Direct mode operation (DMO) transmission method |
| CN104852794A (en) * | 2015-04-21 | 2015-08-19 | 四川大学 | Method and terminal for realizing long term evolution (LTE) terminal direct communication based on clock |
| CN105453627A (en) * | 2013-08-06 | 2016-03-30 | 夏普株式会社 | Terminal device |
| WO2022017359A1 (en) * | 2020-07-21 | 2022-01-27 | 维沃移动通信有限公司 | Direct communication start-up control method and related device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101496430A (en) * | 2005-01-25 | 2009-07-29 | 美商内数位科技公司 | Peer-to-peer wireless communication system |
| JP4475328B2 (en) * | 2007-12-26 | 2010-06-09 | ソニー株式会社 | Wireless communication system, wireless communication apparatus, wireless communication method, and program |
| CN105025592A (en) * | 2009-09-18 | 2015-11-04 | 交互数字专利控股公司 | Application method in STA and STA |
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2011
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105453627A (en) * | 2013-08-06 | 2016-03-30 | 夏普株式会社 | Terminal device |
| CN105453627B (en) * | 2013-08-06 | 2019-10-15 | 夏普株式会社 | Terminal installation, communication means and integrated circuit |
| CN104717633A (en) * | 2013-12-11 | 2015-06-17 | 普天信息技术研究院有限公司 | Direct mode operation (DMO) transmission method |
| CN104717633B (en) * | 2013-12-11 | 2018-03-30 | 普天信息技术研究院有限公司 | The transmission method of direct mode operation |
| CN104852794A (en) * | 2015-04-21 | 2015-08-19 | 四川大学 | Method and terminal for realizing long term evolution (LTE) terminal direct communication based on clock |
| CN104852794B (en) * | 2015-04-21 | 2019-01-15 | 四川大学 | The straight-through method and terminal of LTE terminal is realized based on clock |
| WO2022017359A1 (en) * | 2020-07-21 | 2022-01-27 | 维沃移动通信有限公司 | Direct communication start-up control method and related device |
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| CN102685912B (en) | 2017-04-05 |
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