WO2014186985A1 - Communication device and wireless communication method - Google Patents

Communication device and wireless communication method Download PDF

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Publication number
WO2014186985A1
WO2014186985A1 PCT/CN2013/076228 CN2013076228W WO2014186985A1 WO 2014186985 A1 WO2014186985 A1 WO 2014186985A1 CN 2013076228 W CN2013076228 W CN 2013076228W WO 2014186985 A1 WO2014186985 A1 WO 2014186985A1
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Prior art keywords
message frame
frame
broadcast message
discovery broadcast
time point
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PCT/CN2013/076228
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French (fr)
Chinese (zh)
Inventor
董贤东
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东莞宇龙通信科技有限公司
宇龙计算机通信科技(深圳)有限公司
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Priority to PCT/CN2013/076228 priority Critical patent/WO2014186985A1/en
Publication of WO2014186985A1 publication Critical patent/WO2014186985A1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/005Discovery of network devices, e.g. terminals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10Small scale networks; Flat hierarchical networks
    • H04W84/12WLAN [Wireless Local Area Networks]

Abstract

Provided in the present invention is a communication device comprising: a data interaction module, for receiving a discovery broadcast message frame and transmitting a response message frame of the discovery broadcast message frame, wherein the discovery broadcast message frame is received at a first time point and at least contains a broadcast cycle of the discovery broadcast message frame and/or a second time point for the re-transmission of the discovery broadcast message frame; and a data processing module, for recording the first time point, acquiring the second time point, and determining a third time point between the first time point and the second time point for the data interaction module to transmit the response message frame. The technical solution of the present invention enables the devices receiving the discovery broadcast message frame to respectively determine the corresponding time points for returning the response message frame, thereby reducing the probability of conflict in the prior art due to the fact that the devices all transmit the response message frame immediately, and also contributing to improving the efficiency of connection establishment among the devices.

Description

 Description

 Communication device and wireless communication method

 Technical field

 The present invention relates to the field of wireless communication technologies, and in particular, to a communication device and a wireless communication method. Background technique

 In the WFA (Wi-Fi Alliance), a new research group NAN (Neighbor Awareness Networking) was established. The content of the research is social network, mainly how many STAs (terminals) discover other things together. STAs of the service and perform file sharing or other services.

 Since there is no case where the service message is a broadcast message in the existing 802.11 mechanism, there is no special mechanism and method to define how to process the service broadcast message. However, in the existing 802.11 mechanism, for a general broadcast message, the STA (terminal) will reply the response message to the sender of the broadcast message immediately after receiving the message. Considering the actual situation in the NAN network, there may be many responders around the broadcast message sender STA. The situation is that a large number of response messages are returned to the sender of the broadcast message in a short time, which may cause A large number of conflicts, especially for hidden nodes, conflicts are inevitable. A specific schematic diagram is shown in Figure 1. The broadcast service discovery message frame is sent by STA B. However, STA A and STA B cannot interfere with each other because they cannot hear each other's response message frame of the broadcast message frame.

Therefore, a new technical solution is needed, so that devices that receive the discovery broadcast message frame each determine a corresponding time point to return a response message frame, which reduces the possibility that the device in the prior art immediately sends a response message frame and may generate a collision. , which is beneficial to improve the connection efficiency between devices. Summary of the invention

 The present invention is based on the above problem, and proposes a new technical solution, so that devices that receive the discovery broadcast message frame each determine a corresponding time point to return a response message frame, and reduce the device in the prior art to immediately send a response message frame. The possibility of conflicts is conducive to the improvement of the connection efficiency between devices.

 In view of the above, the present invention provides a communication device, including: a data interaction module, receiving a discovery broadcast message frame, and transmitting a response message frame of the discovery broadcast message frame, where the discovery broadcast message frame is at a first time a point is received, and the discovery broadcast message frame includes at least a broadcast period of the discovery broadcast message frame and/or a second time point at which the discovery broadcast message frame is retransmitted; a data processing module, recording the first a time point, where the second time point is acquired or the broadcast period is included in the discovery broadcast message frame, the second time point is calculated according to the broadcast period, and at the first time A third time point is determined between the point and the second time point for the data interaction module to send the response message frame.

 In the technical solution, the communication device may be a mobile phone or a tablet, or may be a device such as a router, the data processing module may be a chip module for data processing in the communication device, and the data interaction module is equivalent to a signal transceiver device and an antenna. Preferably, the above communication device is supported

NAN-enabled device. In the NAN network, when the communication device receives the discovery broadcast message frame, the default processing method is to immediately return the response message frame, but for the sender of the broadcast message frame, when the number of devices returning the response message frame is too large, It may cause conflicts on the sender, which affects the connection efficiency between devices. Therefore, by receiving, by the device, the first time point of the discovery broadcast message frame is received (assumed to be T1); at the same time, the second time point (assumed to be T2) that the sender transmits again can be parsed from the discovery broadcast message frame, of course, In one case, T2 may be parsed directly from the discovery broadcast message frame. In the other case, the transmission period of the message frame is first parsed (assumed to be T), and the second time point is calculated as T2=T1+ T; Then, select the third time point between T1 and Τ2 (assumed to be Τ3), and send a response message frame at Τ3. Since each device selects its own corresponding Τ3, the probability of sending a response message frame at the same time is reduced, the probability of collision is reduced or avoided, and the connection efficiency between devices is improved.

In the above technical solution, preferably, the third time point is the data processing module The time point selected by the machine.

 In this technical solution, T3 is randomly selected, and may be selected by selecting an arbitrary time point between T1 and T2 or a period of time between T1 and T2, which may be a time unit ( Time Unit, TU ) is multiplied by a certain integer m. T3 can also be selected by randomly selecting an integer n between 0 and m, and then multiplying by TU, because all T3s that need to return a response message frame are needed. The probability that the time points are the same is very low, which can effectively reduce or avoid the probability of sending message conflicts, and also improve the connection efficiency between devices.

 In the above technical solution, preferably, the discovery broadcast message frame received by the data interaction module is a service discovery broadcast message frame, a device discovery broadcast message frame, or a service and device discovery broadcast message frame.

 In this technical solution, the service discovery broadcast message frame includes a service message type for informing the device receiving the message frame of the type of service supported by the sender. Device Discovery Broadcast Message The frame contains the device type, which is used to inform the sender of the device type of the device that received the message frame. The service and device discovery broadcast message frame contains the service message type and/or device type, so that the sender's related message is notified to the device that received the message frame.

 In the above technical solution, preferably, the data processing module further acquires a time synchronization function parameter from the discovery broadcast message frame before determining the third time point, and uses the time synchronization function parameter and the The sender of the broadcast message frame is found to be time synchronized.

 In this technical solution, since the time that the devices follow may not be synchronized, the TSF (Time Synchronization Function) information in the broadcast message frame is found, and the sender and the receiver of the message frame are implemented. Time synchronization, in order to facilitate the determination of T3, to avoid the calculation of T3 can not be used (such as greater than the transmission period of the discovery function message frame, etc.).

 In the above technical solution, the data processing module further obtains a device type identifier bit or a message frame type identifier bit from the discovery broadcast message frame, where the value of the device type identifier bit or the message frame type identifier bit is represented. Whether the sender of the discovery broadcast message frame is a neighbor aware network device or whether the discovery broadcast message frame is a neighbor aware network message frame.

In this technical solution, there are many types of broadcast message frames, and some may not be found. Broadcast message frames are not used for discovery connections between NAN devices. Therefore, the sender of a message frame needs to indicate its identity, that is, whether it is a NAN device. If it is, the receiver will perform operations such as parsing the message frame. Otherwise, it does not need to be executed.

 In the above technical solution, preferably, the data processing module determines the value of the device type identifier bit or the message frame type identifier bit from a frame control field of a frame header of the medium access control frame of the discovery broadcast message frame.

 In this technical solution, one or more reserved bits in a frame control domain of a frame header of a MAC (Medium Access Control) frame of a message frame may be used to place a device type identifier bit or a message frame type identifier. Bit, to indicate the support of the sender of the message frame for the service message.

 In the above technical solution, preferably, the data processing module determines the device type identifier bit from a type subfield and a subtype subdomain of a frame control field of a frame header of a medium access control frame of the discovery broadcast message frame or The value of the message frame type identification bit.

 In this technical solution, for example, the device type identifier bit or the message frame type identifier bit may be placed by using the "11" in the type sub-domain and the reserved bit corresponding to "0000" in the sub-type sub-domain. Indicates the support of the sender of the message frame to the service message. When the value of the preset position matches the preset value, it is determined that the sender of the message frame is a NAN device; otherwise, it is considered not to be a NAN device, and if the destination address of the message frame is not the receiver of the message frame, the device is discarded. The message frame.

 In the above technical solution, preferably, in a case that the discovery broadcast message frame is a service discovery broadcast message frame or a service and device discovery broadcast message frame, the data processing module further obtains a service from the discovery broadcast message frame. A type identifier bit, where the value of the service type identifier bit indicates specific information of a service message type and/or a service message corresponding to the discovery broadcast message frame.

 In this technical solution, for the service discovery broadcast message frame and the service and device discovery broadcast message frame, the support of the sender of the message frame for the service message can be directly determined to determine whether to connect to the sender device.

 In the above technical solution, preferably, the data processing module determines a value of the service type identifier bit from a header portion of the medium access control frame of the discovery broadcast message frame.

In this technical solution, one or more reservations of the frame header portion of the MAC frame may be utilized. Bit, to place the service type identifier bit. Specifically, for example, the frame header portion of the MAC frame includes A (Address) 1, A2, and A3 fields, where the Al field is used to describe the destination address, and the A2 field is used to describe the source address, considering the actual characteristics of the NAN network, Since each NAN device is independently connected to other NAN devices without the assistance of another device, the A3 address is not available in the NAN network, and then it can be used as the service type identifier of the NAN device.

 In the above technical solution, preferably, the data processing module determines a value of the service type identifier bit from an order domain of a frame body portion of the medium access control frame of the discovery broadcast message frame.

 In this technical solution, the service type identifier bit may also be placed by using one or more reserved bits of the frame body portion of the MAC frame. Specifically, the reserved bit may be located in the order domain of the frame body part of the MAC frame. Of course, the service type identifier bit may also appear in the form of an information element (IE), and is placed in an order domain of the frame body, for example Placed in the order domain 26, of course, can also be placed in other order domains.

 The present invention also provides a wireless communication method, including: receiving a discovery broadcast message frame, and recording a first time point of reception; the discovery broadcast message frame includes at least a broadcast period of the discovery broadcast message frame and/or The second time point of the discovery that the broadcast message frame is resent, wherein when the discovery broadcast message frame only includes the broadcast period, the second time point is calculated according to the broadcast period; A third time point is determined between the first time point and the second time, for transmitting the response message frame of the discovery broadcast message frame.

In this technical solution, the communication device may be a mobile phone or a tablet, or may be a device such as a router, the data processing module may be a chip module for data processing in the communication device, and the data interaction module is equivalent to a signal transceiver device and an antenna. Preferably, the communication device is a device supporting the NAN function. In the NAN network, when the communication device receives the discovery broadcast message frame, the default processing method is to immediately return the response message frame, but for the sender of the broadcast message frame, when the number of devices returning the response message frame is too large, It may cause conflicts on the sender, which affects the connection efficiency between devices. Therefore, by receiving, by the device, the first time point of the discovery broadcast message frame is received (assumed to be T1); at the same time, the second time point (assumed to be T2) that the sender transmits again can be parsed from the discovery broadcast message frame, of course, In one case, It is possible to parse T2 directly from the discovery broadcast message frame. In the other case, firstly parsing the transmission period of the above message frame (assumed to be T), the second time point is calculated as T2=T1+T; The third time point is selected between T1 and Τ2 (assumed to be Τ3), and a response message frame is sent at Τ3. Since each device selects its own corresponding Τ3, the probability of sending a response message frame at the same time is reduced, the probability of collision is reduced or avoided, and the connection efficiency between devices is also improved.

 In the above technical solution, preferably, the method further includes: the third time point is a randomly selected time point.

 In this technical solution, Τ3 is randomly selected, and it may be selected by selecting an arbitrary time point between T1 and Τ2 or a period of time between T1 and Τ2, which may be a time unit (Time) Unit, TU) is multiplied by a certain integer m. The choice of T3 can also be randomly selected from 0 to m to select an integer n, and then multiplied by TU, because all the T3 time needed to return the response message frame. The probability that the points are all the same is very low, which can effectively reduce or avoid the probability of sending message conflicts, and also improve the connection efficiency between devices.

 In the above technical solution, preferably, the method further includes: the discovery broadcast message frame is a service discovery broadcast message frame, a device discovery broadcast message frame, or a service and device discovery broadcast message frame.

 In this technical solution, the service discovery broadcast message frame includes a service message type for informing the device receiving the message frame of the type of service supported by the sender. Device Discovery Broadcast Message The frame contains the device type, which is used to inform the sender of the device type of the device that received the message frame. The service and device discovery broadcast message frame contains the service message type and/or device type, so that the sender's related message is notified to the device that received the message frame.

 In the above technical solution, preferably, before determining the third time point, the method further includes: acquiring a time synchronization function parameter from the discovery broadcast message frame, and using the time synchronization function parameter and the discovery broadcast message The sender of the frame performs time synchronization.

In this technical solution, since the time that the devices follow may not be synchronized, the TSF (Time Synchronization Function) information in the broadcast message frame is found, and the sender and the receiver of the message frame are implemented. Time synchronization, to facilitate the determination of T3, to avoid the calculation of T3 can not be used (such as greater than the transmission week of the discovery function message frame Period, etc.).

 In the above technical solution, preferably, the method further includes: acquiring a device type identifier bit or a message frame type identifier bit from the discovery broadcast message frame, where the value of the device type identifier bit or the message frame type identifier bit indicates the discovery Whether the sender of the broadcast message frame is a neighbor aware network device or whether the discovery broadcast message frame is a neighbor aware network message frame.

 In this technical solution, there are many types of broadcast message frames, some may not discover broadcast message frames, and are not used for discovery connections between NAN devices. Therefore, the sender of the message frame needs to indicate its identity, that is, whether it is The NAN device, if it is, the receiver will perform operations such as parsing the message frame, otherwise it will not need to be executed.

 In the above technical solution, preferably, the method further includes: determining a value of the device type identifier bit or the message frame type identifier bit from a frame control field of a frame header of the medium access control frame of the discovery broadcast message frame.

 In this technical solution, one or more reserved bits in a frame control domain of a frame header of a MAC (Medium Access Control) frame of a message frame may be used to place a device type identifier bit or a message frame type identifier. Bit, to indicate the support of the sender of the message frame for the service message.

 In the foregoing technical solution, preferably, the method further includes: determining, according to a type subfield and a subtype subfield of a frame control field of a frame header of the medium access control frame of the discovery broadcast message frame, the device type identifier bit or a message frame. The value of the type identifier bit.

 In this technical solution, for example, the device type identifier bit or the message frame type identifier bit may be placed by using the "11" in the type sub-domain and the reserved bit corresponding to "0000" in the sub-type sub-domain. Indicates the support of the sender of the message frame to the service message. When the value of the preset position matches the preset value, it is determined that the sender of the message frame is a NAN device; otherwise, it is considered not to be a NAN device, and if the destination address of the message frame is not the receiver of the message frame, the device is discarded. The message frame.

In the above technical solution, preferably, when the discovery broadcast message frame is a service discovery broadcast message frame or a service and device discovery broadcast message frame, the method further includes: acquiring a service type identifier bit from the discovery broadcast message frame, where The value of the service type identifier bit indicates the specific information of the service message type and/or the service message corresponding to the discovery broadcast message frame. In this technical solution, for the service discovery broadcast message frame and the service and device discovery broadcast message frame, the support of the sender of the message frame for the service message may be directly determined to determine whether to connect to the sender device.

 In the above technical solution, preferably, the method further includes: determining a value of the service type identifier bit from a header portion of the medium access control frame of the discovery broadcast message frame.

 In this technical solution, the service type identification bit can be placed by using one or more reserved bits of the header portion of the MAC frame. Specifically, for example, the frame header portion of the MAC frame includes A (Address) 1, A2, and A3 fields, where the Al field is used to describe the destination address, and the A2 field is used to describe the source address, considering the actual characteristics of the NAN network, Since each NAN device is independently connected to other NAN devices without the assistance of another device, the A3 address is not available in the NAN network, and then it can be used as the service type identifier of the NAN device.

 In the above technical solution, preferably, the method further includes: determining a value of the service type identifier bit from an order domain of a frame body portion of the medium access control frame of the discovery broadcast message frame.

 In this technical solution, the service type identifier bit may also be placed by using one or more reserved bits of the frame body portion of the MAC frame. Specifically, the reserved bit may be located in the order domain of the frame body part of the MAC frame. Of course, the service type identifier bit may also appear in the form of an information element (IE), and is placed in an order domain of the frame body, for example Placed in the order domain 26, of course, can also be placed in other order domains.

 With the above technical solution, the devices that receive the discovery broadcast message frame can respectively determine the corresponding time point to return the response message frame, which reduces the possibility that the devices in the prior art immediately send the response message frame to generate a conflict, which is beneficial to the device room. Establish an increase in connection efficiency. DRAWINGS

 FIG. 1 is a schematic diagram showing interference between a plurality of devices in the prior art;

 2 shows a block diagram of a communication device in accordance with an embodiment of the present invention;

 FIG. 3 shows a flow chart of a method of wireless communication in accordance with an embodiment of the present invention; FIG.

FIG. 4 illustrates a specific processing flow for discovering a broadcast message frame according to an embodiment of the present invention. detailed description

 The above described objects, features and advantages of the present invention will be more fully understood from the following detailed description. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments of the present application may be combined with each other.

 In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the invention may be practiced otherwise than as described herein. Limitations of the embodiments.

 2 shows a block diagram of a communication device in accordance with an embodiment of the present invention.

 As shown in FIG. 2, the communication device 200 according to the embodiment of the present invention includes: a data interaction module 202, receiving a discovery broadcast message frame, and transmitting a response message frame of the discovery broadcast message frame, where the discovery broadcast message The frame is received at a first time point, and the discovery broadcast message frame includes at least a broadcast period of the discovery broadcast message frame and/or a second time point at which the discovery broadcast message frame is retransmitted; the data processing module 204 Recording the first time point, obtaining the second time point, or calculating only the broadcast period in the discovery broadcast message frame, calculating the second time point according to the broadcast period, and A third time point is determined between the first time point and the second time point for the data interaction module 202 to send the response message frame.

In this technical solution, the communication device 200 may be a mobile phone or a tablet, or may be a device such as a router, the data processing module 204 may be a chip module for data processing in the communication device 200, and the data interaction module 202 is equivalent to a signal transceiver device. And antennas, etc. Preferably, the communication device 200 is a device supporting the NAN function. In the NAN network, when the communication device 200 receives the discovery broadcast message frame, the default processing method is to immediately return the response message frame, but this is true for the sender of the broadcast message frame when the number of devices returning the response message frame is too large. , may cause conflicts on the sender, which affects the connection efficiency between devices. Therefore, by receiving, by the device, the first time point of the discovery broadcast message frame is received (assumed to be T1); at the same time, the second time point (assumed to be T2) that the sender transmits again can be parsed from the discovery broadcast message frame, of course, In one case, T2 may be parsed directly from the discovery broadcast message frame. In the other case, the transmission period of the message frame is first parsed (assumed to be T), and the second time point is calculated as T2=T1+ T; Then, select the third time point between T1 and Τ2 (assumed to be T3), and send a response message frame at Τ3. Since each device selects its own corresponding Τ3, the probability of sending a response message frame at the same time is reduced, the probability of collision is reduced or avoided, and the connection efficiency between devices is also improved.

 In the above technical solution, preferably, the third time point is a time point randomly selected by the data processing module 204.

 In this technical solution, Τ3 is randomly selected, and it may be selected by selecting an arbitrary time point between T1 and Τ2 or a period of time between T1 and Τ2, which may be a time unit (Time) Unit, TU) is multiplied by a certain integer m. The choice of T3 can also be randomly selected from 0 to m to select an integer n, and then multiplied by TU, because all the T3 time needed to return the response message frame. The probability that the points are all the same is very low, which can effectively reduce or avoid the probability of sending message conflicts, and also improve the connection efficiency between devices.

 In the above technical solution, preferably, the discovery broadcast message frame received by the data interaction module 202 is a service discovery broadcast message frame, a device discovery broadcast message frame, or a service and device discovery broadcast message frame.

 In this technical solution, the service discovery broadcast message frame includes a service message type for informing the device receiving the message frame of the type of service supported by the sender. Device Discovery Broadcast Message The frame contains the device type, which is used to inform the sender of the device type of the device that received the message frame. The service and device discovery broadcast message frame contains the service message type and/or device type, so that the sender's related message is notified to the device that received the message frame.

 In the above technical solution, preferably, the data processing module 204 further acquires a time synchronization function parameter from the discovery broadcast message frame, and uses the time synchronization function parameter and the location before determining the third time point. It is found that the sender of the broadcast message frame performs time synchronization.

 In this technical solution, since the time that the devices follow may not be synchronized, the TSF (Time Synchronization Function) information in the broadcast message frame is found, and the sender and the receiver of the message frame are implemented. Time synchronization, in order to facilitate the determination of T3, to avoid the calculation of T3 can not be used (such as greater than the transmission period of the discovery function message frame, etc.).

In the above technical solution, preferably, the data processing module 204 is further widely Obtaining a device type identifier bit or a message frame type identifier bit in the broadcast message frame, where the value of the device type identifier bit or the message frame type identifier bit indicates whether the sender of the discovery broadcast message frame is a neighbor aware network device or the discovery Whether the broadcast message frame is a neighbor-aware network message frame.

 In this technical solution, there are many types of broadcast message frames, some may not discover broadcast message frames, and are not used for discovery connections between NAN devices. Therefore, the sender of the message frame needs to indicate its identity, that is, whether it is The NAN device, if it is, the receiver will perform operations such as parsing the message frame, otherwise it will not need to be executed.

 In the above technical solution, preferably, the data processing module 204 determines the value of the device type identifier bit or the message frame type identifier bit from a frame control domain of a frame header of a medium access control frame of the discovery broadcast message frame. .

 In this technical solution, one or more reserved bits in a frame control domain of a frame header of a MAC (Medium Access Control) frame of a message frame may be used to place a device type identifier bit or a message frame type identifier. Bit, to indicate the support of the sender of the message frame for the service message.

 In the above technical solution, preferably, the data processing module 204 determines the device type identifier bit from a type sub-domain and a sub-type sub-domain of a frame control field of a frame header of a medium access control frame of the discovery broadcast message frame. Or the value of the message frame type identifier bit.

 In this technical solution, for example, the device type identifier bit or the message frame type identifier bit may be placed by using the "11" in the type sub-domain and the reserved bit corresponding to "0000" in the sub-type sub-domain. Indicates the support of the sender of the message frame to the service message. When the value of the preset position matches the preset value, it is determined that the sender of the message frame is a NAN device; otherwise, it is considered not to be a NAN device, and if the destination address of the message frame is not the receiver of the message frame, the device is discarded. The message frame.

 In the foregoing technical solution, preferably, in a case that the discovery broadcast message frame is a service discovery broadcast message frame or a service and device discovery broadcast message frame, the data processing module 204 further obtains from the discovery broadcast message frame. A service type identifier bit, where the value of the service type identifier bit indicates specific information of a service message type and/or a service message corresponding to the discovery broadcast message frame.

In this technical solution, for the service discovery broadcast message frame and the service and device discovery broadcast elimination The frame of the message can directly determine the support of the sender of the message frame for the service message to determine whether to connect to the sender device.

 In the above technical solution, preferably, the data processing module 204 determines a value of the service type identifier bit from a header portion of the medium access control frame of the discovery broadcast message frame.

 In this technical solution, the service type identification bit can be placed by using one or more reserved bits of the header portion of the MAC frame. Specifically, for example, the frame header portion of the MAC frame includes A (Address) 1, A2, and A3 fields, where the Al field is used to describe the destination address, and the A2 field is used to describe the source address, considering the actual characteristics of the NAN network, Since each NAN device is independently connected to other NAN devices without the assistance of another device, the A3 address is not available in the NAN network, and then it can be used as the service type identifier of the NAN device.

 In the above technical solution, preferably, the data processing module 204 determines the value of the service type identifier bit from an order domain of a frame body portion of the medium access control frame of the discovery broadcast message frame.

 In this technical solution, the service type identifier bit may also be placed by using one or more reserved bits of the frame body portion of the MAC frame. Specifically, the reserved bit may be located in the order domain of the frame body part of the MAC frame. Of course, the service type identifier bit may also appear in the form of an information element (IE), and is placed in an order domain of the frame body, for example Placed in the order domain 26, of course, can also be placed in other order domains.

 FIG. 3 shows a flow chart of a method of wireless communication in accordance with an embodiment of the present invention.

 As shown in FIG. 3, the wireless communication method according to the embodiment of the present invention includes: Step 302: Receive a discovery broadcast message frame, and record a first time point when receiving; Step 304: The discovery broadcast message frame includes at least a second time point of the broadcast period of the discovery broadcast message frame and/or the discovery broadcast message frame being retransmitted, wherein, when the discovery broadcast message frame only includes the broadcast period, according to the broadcast period Calculating the second time point; Step 306, determining a third time point between the first time point and the second time point, for transmitting the response message frame of the discovery broadcast message frame.

In the technical solution, the communication device may be a mobile phone or a tablet, or may be a device such as a router, and the data processing module may be a chip module for data processing in the communication device, and the data interaction The module is equivalent to a signal transmitting device and an antenna. Preferably, the above communication device is supported

NAN-enabled device. In the NAN network, when the communication device receives the discovery broadcast message frame, the default processing method is to immediately return the response message frame, but for the sender of the broadcast message frame, when the number of devices returning the response message frame is too large, It may cause conflicts on the sender, which affects the connection efficiency between devices. Therefore, by receiving, by the device, the first time point of the discovery broadcast message frame is received (assumed to be T1); at the same time, the second time point (assumed to be T2) that the sender transmits again can be parsed from the discovery broadcast message frame, of course, In one case, T2 may be parsed directly from the discovery broadcast message frame. In the other case, the transmission period of the message frame is first parsed (assumed to be T), and the second time point is calculated as T2=T1+ T; Then, select the third time point between T1 and Τ2 (assumed to be Τ3), and send a response message frame at Τ3. Since each device selects its own corresponding Τ3, the probability of sending a response message frame at the same time is reduced, the probability of collision is reduced or avoided, and the connection efficiency between devices is improved.

 In the above technical solution, preferably, the method further includes: the third time point is a randomly selected time point.

 In this technical solution, Τ3 is randomly selected, and it may be selected by selecting an arbitrary time point between T1 and Τ2 or a period of time between T1 and Τ2, which may be a time unit (Time) Unit, TU) is multiplied by a certain integer m. The choice of T3 can also be randomly selected from 0 to m to select an integer n, and then multiplied by TU, because all the T3 time needed to return the response message frame. The probability that the points are all the same is very low, which can effectively reduce or avoid the probability of sending message conflicts, and also improve the connection efficiency between devices.

 In the above technical solution, preferably, the method further includes: the discovery broadcast message frame is a service discovery broadcast message frame, a device discovery broadcast message frame, or a service and device discovery broadcast message frame.

In the technical solution, the service discovery broadcast message frame includes a service message type, and is used to notify the device that receives the message frame of the service type supported by the sender. The device discovery broadcast message frame includes a device type for informing the device type of the sender that the device type of the sender is received. The service and device discovery broadcast message frame contains the service message type and/or device type, so that the sender's related message informs the device that received the message frame. In the above technical solution, preferably, before determining the third time point, the method further includes: acquiring a time synchronization function parameter from the discovery broadcast message frame, and using the time synchronization function parameter and the discovery broadcast message The sender of the frame performs time synchronization.

 In this technical solution, since the time that the devices follow may not be synchronized, the TSF (Time Synchronization Function) information in the broadcast message frame is found, and the sender and the receiver of the message frame are implemented. Time synchronization, in order to facilitate the determination of T3, to avoid the calculation of T3 can not be used (such as greater than the transmission period of the discovery function message frame, etc.).

 In the above technical solution, preferably, the method further includes: acquiring a device type identifier bit or a message frame type identifier bit from the discovery broadcast message frame, where the value of the device type identifier bit or the message frame type identifier bit indicates the discovery Whether the sender of the broadcast message frame is a neighbor aware network device or whether the discovery broadcast message frame is a neighbor aware network message frame.

 In this technical solution, there are many types of broadcast message frames, some may not discover broadcast message frames, and are not used for discovery connections between NAN devices. Therefore, the sender of the message frame needs to indicate its identity, that is, whether it is The NAN device, if it is, the receiver will perform operations such as parsing the message frame, otherwise it will not need to be executed.

 In the above technical solution, preferably, the method further includes: determining a value of the device type identifier bit or the message frame type identifier bit from a frame control field of a frame header of the medium access control frame of the discovery broadcast message frame.

 In this technical solution, one or more reserved bits in a frame control domain of a frame header of a MAC (Medium Access Control) frame of a message frame may be used to place a device type identifier bit or a message frame type identifier. Bit, to indicate the support of the sender of the message frame for the service message.

 In the foregoing technical solution, preferably, the method further includes: determining, according to a type subfield and a subtype subfield of a frame control field of a frame header of the medium access control frame of the discovery broadcast message frame, the device type identifier bit or a message frame. The value of the type identifier bit.

In this technical solution, for example, the device type identifier bit or the message frame type identifier bit may be placed by using the "11" in the type sub-domain and the reserved bit corresponding to "0000" in the sub-type sub-domain. Indicates the support of the sender of the message frame to the service message. When the preset position When the value matches the preset value, it is determined that the sender of the message frame is a NAN device; otherwise, it is considered not to be a NAN device, and if the destination address of the message frame is not the receiver of the message frame, the message frame is discarded.

 In the above technical solution, preferably, when the discovery broadcast message frame is a service discovery broadcast message frame or a service and device discovery broadcast message frame, the method further includes: acquiring a service type identifier bit from the discovery broadcast message frame, where The value of the service type identifier bit indicates the specific information of the service message type and/or the service message corresponding to the discovery broadcast message frame.

 In this technical solution, for the service discovery broadcast message frame and the service and device discovery broadcast message frame, the support of the sender of the message frame for the service message can be directly determined to determine whether to connect to the sender device.

 In the above technical solution, preferably, the method further includes: determining a value of the service type identifier bit from a header portion of the medium access control frame of the discovery broadcast message frame.

 In this technical solution, the service type identification bit can be placed by using one or more reserved bits of the header portion of the MAC frame. Specifically, for example, the frame header portion of the MAC frame includes A (Address) 1, A2, and A3 fields, where the Al field is used to describe the destination address, and the A2 field is used to describe the source address, considering the actual characteristics of the NAN network, Since each NAN device is independently connected to other NAN devices without the assistance of another device, the A3 address is not available in the NAN network, and then it can be used as the service type identifier of the NAN device.

 In the above technical solution, preferably, the method further includes: determining a value of the service type identifier bit from an order domain of a frame body portion of the medium access control frame of the discovery broadcast message frame.

 In this technical solution, the service type identifier bit may also be placed by using one or more reserved bits of the frame body portion of the MAC frame. Specifically, the reserved bit may be located in the order domain of the frame body part of the MAC frame. Of course, the service type identifier bit may also appear in the form of an information element (IE), and is placed in an order domain of the frame body, for example Placed in the order domain 26, of course, can also be placed in other order domains.

 4 shows a detailed process flow diagram for discovering broadcast message frames in accordance with an embodiment of the present invention.

As shown in FIG. 4, a specific processing flow for discovering a broadcast message frame according to an embodiment of the present invention The process includes:

 Step 402, assuming that the device A is the sender of the discovery broadcast message frame, and the device B is the device that receives the discovery broadcast message frame, that is, the process of the device B is taken as an example here, and the other received the broadcast message frame of the discovery is received. The device can also be processed in the same steps and manner. Among them, device A, device B, and other devices are NAN devices.

 Step 404: Device B determines whether the broadcast message frame is a NAN message frame. Specifically, for example, it may be judged by a joint value of a type subfield and a subtype subfield of a header portion of a MAC frame in which a broadcast message frame is found. If the determination is yes, then go to step 406, otherwise go to step 412.

 Step 406: The device B determines whether the broadcast message frame is found to be of a type required by itself. Certainly, it should be noted that the broadcast message frame may be specifically a service discovery broadcast message frame, a device discovery broadcast message frame, or a service and device discovery broadcast message frame, where the service discovery broadcast message frame includes a service message type, and is used to Device B is notified of the type of service supported by device A. The device discovery broadcast message frame contains the device type, which is used to inform device B of the device type of device A. The service and device discovery broadcast message frame contains the service message type and/or device type, so that device A related message is notified to device B.

 It can be seen that when the discovery broadcast message frame received by the device B is a service discovery broadcast message frame or a service and device discovery broadcast message frame, step 406 needs to be performed; and when the discovery broadcast message frame received by the device B is a device discovery broadcast message frame. At that time, step 406 need not be performed, and step 404 is directly entered into step 408.

 Specifically, when device B determines the type of the received discovery broadcast message frame, it may parse out a certain sub-domain (such as A3, A4 domain) or a sub-domain of the frame body part of the frame header portion of the message frame. The service message type identifier contained in (such as a certain order domain) determines the type of service message supported by device A and/or the content of the service message. If the type is correct, the process proceeds to step 408; otherwise, the process proceeds to step 412.

Step 408, determining that the device B receives the time point T1 of discovering the broadcast message frame, parsing out the time point T2 at which the message frame is retransmitted from the received discovery broadcast message frame, or parsing the sending period of the message frame, and Calculating T2 according to the transmission period; determining a time point T3 between T1 and T2, specifically, by randomly selecting between T1 and T2, Thereby reducing the probability that multiple devices are selected to the same T3 time point, effectively avoiding message conflicts on device A.

 It should be noted that device A and device B may not be synchronized in time, so TSF information may be set in the discovery broadcast message frame, and device B may synchronize with device A according to the TSF information before determining T3. To ensure the accuracy and enforceability of the point in time.

 Step 410: Device B sends a response message frame of the received discovery broadcast message frame at T3.

 Step 412: Device B discards the received discovery broadcast message frame.

 The technical solution of the present invention is described in detail above with reference to the accompanying drawings. The present application provides a communication device and a wireless communication method, so that devices that receive a broadcast broadcast message frame respectively determine a corresponding time point to return a response message frame, and reduce In the prior art, the probability that the device immediately sends a response message frame to cause a collision is beneficial to improve the connection efficiency between devices.

 The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

Claim
A communication device, comprising:
 a data interaction module, configured to receive a discovery broadcast message frame, and send a response message frame of the discovery broadcast message frame, where the discovery broadcast message frame is received at a first time point, and the discovery broadcast message frame includes at least Determining a broadcast period of the broadcast message frame and/or a second time point at which the discovery broadcast message frame is transmitted again;
 a data processing module, when the first time point is recorded, the second time point is acquired, or the broadcast period is included in the discovery broadcast message frame, and the second time is calculated according to the broadcast period Pointing, and determining a third time point between the first time point and the second time point for the data interaction module to send the response message frame.
 2. The communication device according to claim 1, wherein the third time point is a time point randomly selected by the data processing module.
 The communication device according to claim 1, wherein the discovery broadcast message frame received by the data interaction module is a service discovery broadcast message frame, a device discovery broadcast message frame, or a service and device discovery broadcast message frame. .
 The communication device according to claim 1, wherein the data processing module further acquires a time synchronization function parameter from the discovery broadcast message frame before determining the third time point, and uses the The time synchronization function parameter is time synchronized with the sender of the discovery broadcast message frame.
 The communication device according to claim 1, wherein the data processing module further acquires a device type identifier bit or a message frame type identifier bit, the device type identifier bit or a message from the discovery broadcast message frame. The value of the frame type identification bit indicates whether the sender of the discovery broadcast message frame is a neighbor aware network device or whether the discovery broadcast message frame is a neighbor aware network message frame.
6. The communication device according to claim 5, wherein the data processing module determines the device type identifier bit or message from a frame control field of a frame header of a medium access control frame of the discovery broadcast message frame. The value of the frame type flag.
7. The communication device according to claim 6, wherein the data processing module determines from a type subfield and a subtype subfield of a frame control field of a frame header of a medium access control frame of the discovery broadcast message frame. The device type identifier bit or the value of the frame type identifier bit.
 The communication device according to any one of claims 1 to 7, wherein, in the case that the discovery broadcast message frame is a service discovery broadcast message frame or a service and device discovery broadcast message frame, the data The processing module further obtains a service type identifier bit from the discovery broadcast message frame, where the value of the service type identifier bit indicates specific information of a service message type and/or a service message corresponding to the discovery broadcast message frame.
 9. The communication device of claim 8, wherein the data processing module determines a value of the service type identification bit from a header portion of a medium access control frame of the discovery broadcast message frame.
 10. The communication device according to claim 8, wherein the data processing module determines a value of the service type identification bit from an order domain of a frame body portion of the medium access control frame of the discovery broadcast message frame. .
 11. A method of wireless communication, comprising:
 Receiving a discovery broadcast message frame, and recording the first time point when receiving;
 The discovery broadcast message frame includes at least the discovery broadcast; Shaw, a broadcast period of the frame and a second time point when the discovery broadcast message frame is retransmitted, wherein, when the discovery broadcast message frame is only When the broadcast period is included, calculating the second time point according to the broadcast period;
 A third time point is determined between the first time point and the second time point for transmitting a response message frame of the discovery broadcast message frame.
 The wireless communication method according to claim 11, further comprising: the third time point being a randomly selected time point.
 The wireless communication method according to claim 11, further comprising: the discovery broadcast message frame is a service discovery broadcast message frame, a device discovery broadcast message frame or a service and a device discovery broadcast message frame.
The wireless communication method according to claim 11, wherein before determining the third time point, the method further includes: Obtaining a time synchronization function parameter from the discovery broadcast message frame, and performing time synchronization with a sender of the discovery broadcast message frame by using the time synchronization function parameter.
 The wireless communication method according to claim 11, further comprising: acquiring a device type identifier bit or a message frame type identifier bit, the device type identifier bit or a message frame type from the discovery broadcast message frame. The value of the identification bit indicates whether the sender of the discovery broadcast message frame is a neighbor aware network device or whether the discovery broadcast message frame is a neighbor aware network message frame.
 16. The wireless communication method according to claim 15, further comprising: determining the device type identification bit or message frame from a frame control field of a frame header of a medium access control frame of the discovery broadcast message frame. The value of the type identifier bit.
 The wireless communication method according to claim 16, further comprising: determining, from the discovery broadcast cancellation, a type subfield and a subtype subfield of a frame control field of a frame header of a medium access control frame of the frame The value of the device type identifier bit or the message frame type identifier bit.
 The wireless communication method according to any one of claims 11 to 17, wherein when the discovery broadcast message frame is a service discovery broadcast message frame or a service and device discovery broadcast message frame, the method further includes:
 Obtaining a service type identifier bit from the discovery broadcast message frame, where the value of the service type identifier bit indicates specific information of a service message type and/or a service message corresponding to the discovery broadcast message frame.
 19. The method of wireless communication of claim 18, further comprising: determining a value of the service type identification bit from a header portion of a medium access control frame of the discovery broadcast message frame.
 The wireless communication method according to claim 18, further comprising: determining a value of the service type identifier bit from an order domain of a frame body portion of the medium access control frame of the discovery broadcast message frame.
PCT/CN2013/076228 2013-05-24 2013-05-24 Communication device and wireless communication method WO2014186985A1 (en)

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