WO2017031645A1 - 一种退避方法、传输消息方法及装置 - Google Patents

一种退避方法、传输消息方法及装置 Download PDF

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Publication number
WO2017031645A1
WO2017031645A1 PCT/CN2015/087861 CN2015087861W WO2017031645A1 WO 2017031645 A1 WO2017031645 A1 WO 2017031645A1 CN 2015087861 W CN2015087861 W CN 2015087861W WO 2017031645 A1 WO2017031645 A1 WO 2017031645A1
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Prior art keywords
node
channel
spatial multiplexing
message
indication information
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PCT/CN2015/087861
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English (en)
French (fr)
Inventor
丁志明
禄⋅彼得
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华为技术有限公司
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Priority to CN201580082472.9A priority Critical patent/CN107926061B/zh
Priority to PCT/CN2015/087861 priority patent/WO2017031645A1/zh
Publication of WO2017031645A1 publication Critical patent/WO2017031645A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/20Manipulation of established connections

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a backoff method, a method and apparatus for transmitting a message.
  • WLAN Wireless Local Area Network
  • a node in a WLAN sends a message by contending for a channel.
  • a STA (Station) or an AP (Access Point) that is ready to send a message needs to adopt a competitive mechanism to send a message.
  • the STA or the AP randomly generates a number as a count value in the backoff counter, and then starts to monitor the channel.
  • the backoff counter is used.
  • the count value in the execution performs a decrement operation.
  • the count value in the backoff counter stops decreasing by one until the channel is idle and then continues to perform the subtraction operation.
  • the count value in the backoff counter is reduced to 0, a message can be sent.
  • the above is called a backoff process. This kind of competition mechanism can avoid conflicts caused by two nodes sending messages at the same time, but the communication efficiency is not high.
  • FIG. 1 a schematic diagram of a multi-node distribution provided by an embodiment of the present invention.
  • STA3 and STA2 cover each other, STA3 and STA5 cover each other, and STA2 and STA5 are far away from each other and do not cover each other.
  • STA2 is to transmit data to STA1
  • STA3 is to transmit data to STA4
  • STA5 is to transmit data to STA6, at which time STA2, STA3, and STA5 need to contend for the channel.
  • FIG. 1 a schematic diagram of a multi-node distribution provided by an embodiment of the present invention.
  • STA3 and STA2 cover each other, STA3 and STA5 cover each other, and STA2 and STA5 are far away from each other and do not cover each other.
  • STA2 is to transmit data to STA1
  • STA3 is to transmit data to STA4
  • STA5 is to transmit data to STA6, at which time STA2, STA3, and STA5 need
  • FIG. 1 is a schematic diagram of multi-node transmission according to an embodiment of the present invention.
  • STA2, STA3, and STA5 randomly generate initial count values R1, R2, and R3, respectively, and R1 ⁇ R2 ⁇ R3. Since the channel is idle, the three STAs start counting respectively. STA2 first counts to 0, then begins to occupy the channel and send a message. When STA2 starts to send a message, STA3 listens to the message sent by STA2, and stops counting. At the same time, the STA3 needs to determine the received power of the message sent by the STA2, and obtain information such as the sender identifier, the receiver identifier, the transmission power, and the like from the received message sent by the STA2.
  • STA3 judges whether STA3 and STA2 send messages at the same time, and does not affect the receiving end of the message sent by STA2 to receive the message sent by STA2. If it is determined that there is no impact, it will send it simultaneously with STA2.
  • STA3 is listening to the message sent by STA2, STA5 cannot detect the message sent by STA2 and STA3, and considers that the channel is idle and continues counting. Thereafter, when STA3 and STA2 simultaneously transmit a message, STA5 stops counting until STA3 message transmission ends, and STA5 continues counting. It should be noted that the STA3 needs to end the sending of the message at the end of the STA2 message transmission, so as not to affect the STA1 sending an Acknowledgement (ACK) frame to the STA2.
  • ACK Acknowledgement
  • STA2 and STA5 send messages to STA3 to stop the backoff process, and STA5 stops the backoff process only when STA3 sends a message.
  • STA3 and STA2 can simultaneously send messages, and STA2 contends to the channel equal to help.
  • STA3 occupies the channel, which greatly reduces the chance of STA5 using the channel.
  • the chance of occupying the channel by the node that is delayed in occupying the channel is reduced, and the node cannot compete for the channel normally, thereby reducing the channel utilization rate of the node.
  • the embodiments of the present invention provide a backoff method, a method and a device for transmitting a message, to ensure that, in a wireless local area network adopting the SR technology, an opportunity for a node that is deferred to occupy a channel to occupy a channel is increased.
  • a backoff method comprising:
  • the first node starts the backoff counter
  • the first node determines that the channel corresponding to the backoff counter is enabled by the second node to pass the space After the multiplexing mode is occupied, and the channel is not occupied by the second node in the spatial multiplexing manner, the backoff counter is continuously counted or the count value of the backoff counter is reduced.
  • the method before the first node does not suspend the backoff counter or reduce the count value of the backoff counter, the method further includes:
  • the first node determines that there is no neighbor node other than the second node and the receiving node of the first node in the coverage of the first node signal.
  • the first node reduces a count value of the backoff counter and suspends the backoff counter .
  • the first node reduces a count value of the backoff counter, including:
  • the first node periodically reduces the count value of the backoff counter during the second node occupies the channel.
  • the first node reduces the count value of the backoff counter, including:
  • the first node multiplies the current count value of the backoff counter by a coefficient and rounds, wherein the coefficient is greater than 0 and less than 1;
  • the first node uses the rounded value as the current count value of the backoff counter.
  • the first node reduces a count value of the backoff counter, including:
  • the first node uses 0 as the current count value of the backoff counter
  • the first node uses the difference as the current count value of the backoff counter.
  • the first node determines, according to the following manner, whether the second node occupies the channel by using a spatial multiplexing manner:
  • the first node listens to the first message sent by the second node to the other node, where the first message includes spatial multiplexing indication information, where the spatial multiplexing indication information is used to indicate that the second node is occupied.
  • the first node determines, according to the spatial multiplexing indication information in the first message, whether the second node occupies the channel by using a spatial multiplexing manner.
  • the method further includes:
  • the second message is sent by using the channel, where the second message includes spatial multiplexing indication information, where the spatial multiplexing indication information is used to indicate that the first node is occupied.
  • the second message includes spatial multiplexing indication information, where the spatial multiplexing indication information is used to indicate that the first node is occupied. The manner in which the channel is occupied.
  • the spatial multiplexing indication information is located in an HE signaling HE-SIG of the message physical header.
  • the method further includes:
  • the three nodes Determining, by the first node, the channel occupied by the third node in the spatial multiplexing manner according to the spatial multiplexing indication information in the third message, after occupying the channel in a contentive manner, using the channel to the first
  • the three nodes send a reply message.
  • a method for transmitting a message comprising:
  • the first node determines that the first node is occupying a channel
  • the spatial multiplexing indication information is used to indicate that the receiving node of the message determines, according to the spatial multiplexing indication information, that the first node occupies the occupied mode of the channel, and is in the first node When the spatial multiplexing mode occupies the channel, the receiving node that instructs the message sends the response message to the first node after occupying the channel in a contentive manner; and/or,
  • the spatial multiplexing indication information is used to indicate that the non-receiving node that listens to the channel determines, according to the spatial multiplexing indication information, that the first node occupies the occupied mode of the channel, and passes the space in the first node.
  • the non-receiving node instructing to listen to the channel waits for the channel to occupy the channel after being idle.
  • a method for transmitting a message comprising:
  • the first node receives the message sent by the second node, and the message sent by the second node includes spatial multiplexing indication information;
  • a method for transmitting a message comprising:
  • the first node listens to the message sent by the third node in the channel, and the message sent by the third node includes spatial multiplexing indication information
  • a backoff device comprising:
  • a processing unit configured to: after determining that the channel corresponding to the initiated backoff counter is occupied by the second node by using the spatial multiplexing manner, and not sharing the channel with the second node by using the spatial multiplexing manner, continuing to perform the backoff counter Counting or reducing the count value of the backoff counter.
  • the processing unit is further configured to:
  • the processing unit reduces a count value of the backoff counter and suspends the backoff counter.
  • the processing unit is specifically configured to:
  • the count value of the backoff counter is periodically decreased.
  • the processing unit is specifically configured to:
  • the rounded value is used as the current count value of the backoff counter.
  • the processing unit is specifically configured to:
  • the difference between the current count value of the backoff counter and the threshold is not less than 0, the difference is used as the current count value of the backoff counter.
  • the processing unit determines whether the second node is in a spatial multiplexing manner according to the following manner Occupy the channel:
  • the first message includes spatial multiplexing indication information, where the spatial multiplexing indication information is used to indicate that the second node occupies the occupied channel the way;
  • the device further includes:
  • the sending unit is configured to send a second message by using the channel after the channel is occupied, where the second message includes spatial multiplexing indication information, where the spatial multiplexing indication information is used to indicate the first
  • the node occupies the way the channel is occupied.
  • the spatial multiplexing indication information is located in an HE signaling HE-SIG of the message physical header.
  • the device further includes:
  • the receiving unit is configured to receive a third message sent by the third node, where the third message includes spatial multiplexing indication information;
  • a device for transmitting a message comprising:
  • a sending unit configured to send a message by using the channel, where the message includes spatial multiplexing indication information, where the spatial multiplexing indication information is used to indicate that the receiving node of the message determines the first according to the spatial multiplexing indication information
  • the node occupies the occupied mode of the channel, and when the first node occupies the channel by using the spatial multiplexing manner, the receiving node that indicates the message occupies the channel in a contentive manner, and sends a response to the first node.
  • the spatial multiplexing indication information is used to indicate that the non-receiving node that listens to the channel determines, according to the spatial multiplexing indication information, that the first node occupies the occupied mode of the channel, and passes the space in the first node.
  • the non-receiving node instructing to listen to the channel waits for the channel to occupy the channel after being idle.
  • a device for transmitting a message comprising:
  • a receiving unit configured to receive a message sent by the second node, where the message sent by the second node includes spatial multiplexing indication information
  • a sending unit configured to determine, according to the spatial multiplexing indication information in the message sent by the second node, the channel occupied by the second node by using a spatial multiplexing manner, occupying the channel through a contention manner, and passing the channel Sending a reply message to the second node.
  • a device for transmitting a message comprising:
  • a listening unit configured to listen to a message sent by a third node in the channel, where the message sent by the third node includes spatial multiplexing indication information
  • a determining unit configured to determine, according to the spatial multiplexing indication information in the message sent by the third node, the channel occupied by the third node after being spatially multiplexed, and waiting for the channel to occupy the channel after being idle.
  • a transport message device comprising an interface, a processor, a memory, and a transceiver:
  • the processor is used to execute the following process:
  • the processor is further configured to:
  • the processor reduces the count value of the backoff counter and suspends the backoff counter.
  • the processor is specifically used to:
  • the count value of the backoff counter is periodically decreased.
  • the processor is specifically configured to:
  • the rounded value is used as the current count value of the backoff counter.
  • the processor is specifically configured to:
  • the difference between the current count value of the backoff counter and the threshold is not less than 0, the difference is used as the current count value of the backoff counter.
  • the processor determines, according to the following manner, whether the second node is occupied by the spatial multiplexing manner Channel:
  • the first message includes spatial multiplexing indication information, where the spatial multiplexing indication information is used to indicate that the second node occupies the occupied channel the way;
  • the processor is further configured to:
  • the second message is sent by using the channel, where the second message includes spatial multiplexing indication information, where the spatial multiplexing indication information is used to indicate that the first node occupies the occupied mode of the channel.
  • the spatial multiplexing indication information is located in an HE signaling HE-SIG of the message physical header.
  • the processor is further configured to:
  • a transport message device comprising an interface, a processor, a memory, and a transceiver:
  • the processor is used to execute the following process:
  • the message includes spatial multiplexing indication information
  • the spatial multiplexing indication information is used to indicate that the receiving node of the message determines, according to the spatial multiplexing indication information, that the first node occupies the channel Mode of occupying, and when the first node occupies the channel by spatial multiplexing, indicating that the receiving node of the message sends the response message to the first node after occupying the channel in a contentive manner; and/or ,
  • the spatial multiplexing indication information is used to indicate that the non-receiving node that listens to the channel determines, according to the spatial multiplexing indication information, that the first node occupies the occupied mode of the channel, and passes the space in the first node.
  • the non-receiving node instructing to listen to the channel waits for the channel to occupy the channel after being idle.
  • a transport message device comprising an interface, a processor, a memory, and a transceiver:
  • the processor is used to execute the following process:
  • the second node After the channel occupied by the spatial multiplexing mode, the channel is occupied by a contention manner, and a response message is sent to the second node through the channel.
  • a transport message device comprising an interface, a processor, a memory, and a transceiver:
  • the processor is used to execute the following process:
  • the first node determines that the channel corresponding to the initiated backoff counter is occupied by the second node in a spatial multiplexing manner, and cannot use the spatial multiplexing mode and the second node occupies the channel. Instead of suspending the backoff counter, it continues to back off the counter count or reduce the count value of the backoff counter, thereby reducing the backoff time required by the first node in performing the backoff process, improving the chance of the first node occupying the channel, and improving The utilization of the channel.
  • FIG. 1 is a schematic diagram of a multi-node distribution according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of multi-node transmission according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a message according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic flowchart of a backoff method according to an embodiment of the present invention.
  • FIG. 5 is a schematic flowchart of a method for transmitting a message according to an embodiment of the present disclosure
  • FIG. 6 is a schematic flowchart of a method for transmitting a message according to an embodiment of the present invention.
  • FIG. 7 is a schematic flowchart of a method for transmitting a message according to an embodiment of the present disclosure
  • FIG. 8 is a schematic structural diagram of a backoff device according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a device for transmitting a message according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a device for transmitting a message according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of a device for transmitting a message according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of another backoff device according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of another apparatus for transmitting a message according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of another apparatus for transmitting a message according to an embodiment of the present disclosure.
  • FIG. 15 is a schematic structural diagram of another apparatus for transmitting a message according to an embodiment of the present invention.
  • the node participating in the channel competition randomly generates a number as the count value in the backoff counter before preparing to send the message, and then starts listening to the channel and performing the backoff procedure.
  • the node contends to the channel, it begins to send messages in the channel.
  • the node determines that the channel is occupied in the backoff process, in order to determine whether the channel can be occupied by the spatial multiplexing mode with the node occupying the channel, the node also listens to the message sent by the node occupying the channel to other nodes, so as to determine Whether to send in parallel with the message sent by this node.
  • FIG. 3 is a schematic structural diagram of a message according to an embodiment of the present invention.
  • a physical header field such as a legacy preamble, a repeated legacy signaling field (RL-SIG), a high efficiency preamble, and a PSDU (Physical Layer Service Data Unit) carried by a frame are included. , physical layer service data unit).
  • the HE preamble includes HE Signal (High Efficiency Signal, HE-SIG), High Efficiency Short Training Field (HE-STF), and High Efficiency Long Training Field (HE-LTF).
  • the first node in FIG. 4 may be an AP, an STA, or the like
  • the second node may be an AP, an STA, or the like.
  • the method specifically includes the following steps:
  • Step 401 The first node starts a backoff counter.
  • Step 402 After the first node determines that the channel corresponding to the initiated backoff counter is occupied by the second node in a spatial multiplexing manner, and cannot share the channel with the second node in a spatial multiplexing manner, continue to The backoff counter counts or reduces the count value of the backoff counter.
  • a random number may be generated first as the count value of the backoff counter. After the first node starts the backoff counter, it starts listening to the channel and counting.
  • the first node determines that the channel is decremented by one in the backoff counter when the channel is in an idle state in one time slot.
  • the length of a time slot is generally preset in the standard of a wireless local area network.
  • the first node may send a second message by using the channel, where the second message includes spatial multiplexing indication information, where the spatial multiplexing indication information is used to indicate the A node occupies the occupied mode of the channel, that is, the spatial multiplexing indication information may indicate whether the first node occupies a channel through spatial multiplexing or a channel in a contention manner.
  • the other node After the other node detects the second message sent by the first node, it may determine, according to the spatial multiplexing indication information in the second message sent by the first node that is heard, that the first node occupies the occupied mode of the channel.
  • the spatial multiplexing indication information may be a bit in a physical header of the message, the bit being pre-agreed. For example, when the value of the bit is 0, it indicates that the node occupying the channel is a channel occupied by performing the backoff process; when the value of the bit is 1, the node occupying the channel is occupied by spatial multiplexing. Channel. It should be noted that the spatial multiplexing indication information may also be represented by a plurality of bits, which is not limited by the embodiment of the present invention.
  • the spatial multiplexing indication information is located in the HE signaling HE-SIG of the physical header of the message.
  • the spatial multiplexing indication information may be composed of any one of the dedicated bits in the HE-SIG or may be composed of a plurality of bits in combination with other indication information, which is not limited by the embodiment of the present invention.
  • the receiving node After receiving the message sent by the sending node, the receiving node needs to return a response message to the sending node, in order to avoid the node that occupies the channel through the spatial multiplexing manner from receiving the multiplexed transmitting node (the node occupying the channel through the contention mode)
  • the response message sent by the receiving node generates interference, and the node occupying the channel by the spatial multiplexing manner needs to end the message being sent before ending the occupied channel by the node occupying the channel in a contention manner, or end simultaneously with the node occupying the channel through the contention mode.
  • the message being sent After receiving the message sent by the sending node, the receiving node needs to return a response message to the sending node, in order to avoid the node that occupies the channel through the spatial multiplexing manner from receiving the multiplexed transmitting node (the node occupying the channel through the contention mode)
  • the response message sent by the receiving node generates interference, and the node occupying the channel
  • a receiving node of a node occupying a channel by spatial multiplexing may simultaneously transmit a response message to a receiving node of a node occupying a channel through a contention manner, thereby causing mutual interference.
  • the receiving node may determine, according to the spatial multiplexing indication information in the received message, whether the corresponding sending node is spatially multiplexed or competitive. The channel occupied by the mode. If the receiving node determines that the sending node occupies the channel by using the spatial multiplexing mode, it does not immediately reply to the response message after receiving the message, but uses the contention mode to retire the response message through the contention channel after competing for the channel. It should be noted that, in the embodiment of the present invention, after the receiving node determines that the sending node occupies the channel in the spatial multiplexing manner, the receiving node may reply the response message in other manners, and details are not described herein again.
  • the first node receives the third message sent by the third node, and the third message sent by the third node includes spatial multiplexing indication information; the first node is according to the third node.
  • the spatial multiplexing indication information in the sent third message determines the channel occupied by the third node in the spatial multiplexing manner, and after the channel is occupied in a contentive manner, the channel sends a response message to the third node.
  • the spatial multiplexing indication information may further indicate that the node that listens for the message does not use the spatial multiplexing manner and the passing when determining that the intercepted message is transmitted through the spatial multiplexing manner.
  • the spatial multiplexing mode occupies nodes of the channel to transmit messages in parallel, but waits for the channel to occupy the channel after being idle. Of course, this is also not restricted.
  • the first node if the first node contends to the channel, the message is sent through the contending channel. If the first node does not contend to the channel, the first node may determine whether the second node occupying the channel occupies the channel jointly by spatial multiplexing, and if yes, directly determines that the channel cannot pass.
  • the inter-multiplex mode occupies the channel together. If not, it is determined whether the channel can be occupied by the second node occupying the channel in a spatial multiplexing manner.
  • the channel transmits the message through the channel; the first node may also not determine whether the second node occupying the channel occupies the channel jointly by spatial multiplexing, and always determines whether it can be spatially multiplexed with the second node occupying the channel.
  • the mode jointly occupies the channel, and if the channel can be occupied by the second node occupying the channel in a spatial multiplexing manner, the message is sent through the channel.
  • the backoff counter may not be suspended or the backoff counter may be reduced. value.
  • the first node may determine whether the second node occupies the channel by spatial multiplexing according to the following manner:
  • the first node listens to the first message sent by the second node to the other node, and the first message sent by the second node to the other node includes spatial multiplexing indication information, where the spatial multiplexing indication information is used to indicate
  • the second node occupies the occupied mode of the channel; the first node determines, according to the spatial multiplexing indication information in the first message sent by the second node, whether the second node occupies the space through the spatial multiplexing manner. Said channel.
  • the first node does not suspend the backoff counter or reduce the count value of the backoff counter, it may also be necessary to determine whether to not suspend the backoff counter or reduce the count value of the backoff counter according to the number of its neighbor nodes.
  • the first node may also need to satisfy any of the following conditions:
  • Condition 1 The first node determines that there is no neighbor node other than the second node in the coverage of the first node signal.
  • Condition 2 The first node determines that there is no neighbor node other than the second node and the receiving node of the first node in the coverage of the first node signal.
  • the receiving node of the first node establishes a connection with the first node, and the first node It is the sender of the message, so the receiving node of the first node does not contend for the channel to send messages to other nodes, and can be excluded.
  • the backoff counter will continue to count down. If the backoff counter counts to 0 before the channel is idle, the backoff counter keeps counting to 0 state and is in the channel. Occupy the channel after being idle.
  • the purpose of reducing the count value of the backoff counter by the first node is to reduce the backoff time required for the first node to perform the backoff procedure when the channel is idle, thereby increasing the chance of competing for the channel.
  • the first node reduces the count value of the backoff counter and suspends the backoff counter.
  • the first node can reduce the count value of the backoff counter in various ways, which are respectively described below.
  • the first node multiplies the current count value of the backoff counter by a factor and rounds, wherein the coefficient is greater than 0 and less than 1; the first node uses the rounded value as the current count value of the backoff counter.
  • the current count value of the backoff counter is A, A ⁇ 0.
  • C is used as the current count value of the backoff counter, that is, C is replaced with A.
  • the backoff counter of the first node starts the backoff process from C.
  • the first node uses 0 as the current count value of the backoff counter
  • the first node uses the difference as the current count value of the backoff counter.
  • the current count value of the backoff counter is A, A ⁇ 0.
  • the backoff counter of the first node starts the backoff process from C.
  • the threshold is a positive integer, and the threshold may be randomly generated each time, and may be pre-agreed or determined according to the current count value of the backoff counter, which is not limited by the embodiment of the present invention.
  • the threshold is determined according to the length of time that the second node occupies the channel by the spatial multiplexing manner. Specifically, the threshold is obtained by dividing the length of time occupied by the second node by the spatial multiplexing method by the reduction factor. The reduction factor is greater than one.
  • the first node periodically reduces the count value of the backoff counter during the second node occupies the channel.
  • the first node subtracts a current value of the backoff counter from a current value or a random value in each cycle.
  • the current count value of the backoff counter is reduced to less than 0, the first node uses 0 as the backoff counter. Current count value.
  • the first node determines whether the current count value of the backoff counter is 0. If it is 0, the channel is occupied, otherwise the backoff process is performed according to the current count value of the backoff counter.
  • the first node does not suspend the backoff counter after determining that the channel corresponding to the initiated backoff counter is occupied by the second node by using the spatial multiplexing manner, and the spatial multiplexing mode cannot occupy the channel with the second node. Rather, it continues to back off the counter count or reduce the count value of the backoff counter, thereby reducing the backoff time required by the first node in performing the backoff process, improving the opportunity for the first node to occupy the channel, and improving the channel utilization.
  • the spatial multiplexing between nodes can effectively improve the channel utilization efficiency, but it is more likely to cause hidden node problems and increase the collision probability. Therefore, it is better to use a spatial multiplexing method and a
  • a node transmitting a message transmits a message in parallel
  • the nodes around it can know that this is a transmission using spatial multiplexing, so that no further spatial multiplexing is used to transmit in parallel with this node.
  • the first node in FIG. 5 may be an AP, an STA, or the like.
  • the method specifically includes the following steps:
  • Step 501 The first node determines that the first node is occupying a channel.
  • Step 502 The first node sends a message by using the channel, where the message includes spatial multiplexing indication information, where the spatial multiplexing indication information is used to indicate that the receiving node of the message is based on the spatial multiplexing indication information. Determining, by the first node, the occupation mode of the channel, and when the first node occupies the channel by using a spatial multiplexing manner, indicating that the receiving node of the message occupies the channel by using a contentive manner, The first node sends a response message; and/or the spatial multiplexing indication information is used to indicate that the non-receiving node that listens to the channel determines that the first node occupies the occupied channel according to the spatial multiplexing indication information. And, when the first node occupies the channel by spatial multiplexing, indicating that the non-receiving node that listens to the channel waits for the channel to be idle and occupies the channel.
  • the first node may occupy the channel in a contention manner, or may occupy the channel through spatial multiplexing.
  • the first node specifically occupies a channel, which is not limited by the embodiment of the present invention.
  • the receiving node is a node corresponding to the destination address carried in the message
  • the non-receiving node is a node that does not correspond to the destination address carried in the message. Since the node will listen to the channel, the received message may not be sent to itself.
  • the node that receives the message may be the receiving node of the message sent by the first node; or may be other nodes that are listening to the channel, ie, the non-receiving node.
  • the spatial multiplexing indication information in the message sent by the first node may be a bit in the physical header of the message, and the bit is pre-agreed. For example, when the value of the bit is 0, it indicates that the node occupying the channel is a channel occupied by performing the backoff process; when the value of the bit is 1, the node occupying the channel is occupied by spatial multiplexing. Channel.
  • the spatial multiplexing indication information may also be represented by a plurality of bits, which is not limited by the embodiment of the present invention.
  • the spatial multiplexing indication information is located in the HE signaling HE-SIG of the physical header of the message.
  • the spatial multiplexing indication information may be composed of any one of the dedicated bits in the HE-SIG or may be composed of a plurality of bits in combination with other indication information, which is not limited by the embodiment of the present invention.
  • the receiving node of the message sent by the first node determines, according to the spatial multiplexing indication information, that the first node occupies the channel by using a contention manner, the receiving node is in the manner specified in a standard of an existing wireless local area network.
  • the first node sends a reply message. For example, after the first node message is sent, a response message is sent to the first node through the channel.
  • the receiving node of the message sent by the first node determines that the first node occupies the channel in a contentive manner
  • the receiving node may send a response message to the first node according to other manners. Not limited.
  • the receiving node of the message sent by the first node determines, according to the spatial multiplexing indication information, that the first node occupies the channel by using a spatial multiplexing manner, the channel is occupied by the contention manner and then sent to the first node. Reply message.
  • the non-receiving node that listens to the channel determines, according to the spatial multiplexing indication information, that the first node occupies the channel in a contention manner, and may determine whether the channel can be occupied by the first node together, if the The receiving section determines that the channel is occupied by the first node by spatial multiplexing.
  • the first node may listen to the channel or receive a message sent by the second node.
  • the first node determines how to send the response message to the second node according to the occupation mode of the occupied channel of the second node. Specifically, the first node receives the message sent by the second node, where the message sent by the second node includes spatial multiplexing indication information, and the first node is configured according to the spatial multiplexing indication in the message sent by the second node. After determining the channel occupied by the second node by using the spatial multiplexing mode, the channel occupies the channel in a contention manner, and sends a response message to the second node by using the channel.
  • the spatial multiplexing indication information in the message determines the channel occupied by the second node in a contention manner, and sends a response message to the first node in a manner stipulated in the standard of the existing wireless local area network.
  • the first node listens to the channel, it determines whether the channel is occupied by the third node in a spatial multiplexing manner according to the occupation mode of the occupied channel of the third node that is occupying the channel. Specifically, the first node listens to the message sent by the third node in the channel, and the message sent by the third node includes spatial multiplexing indication information; the first node is configured according to the message sent by the third node. Determining, by the spatial multiplexing instruction information, the channel occupied by the third node in the spatial multiplexing manner, determining that the channel is not occupied by the third node by the spatial multiplexing manner, but waiting for the channel to be idle and occupying the channel channel.
  • the first node determines, according to the spatial multiplexing indication information in the message sent by the third node, the channel occupied by the third node in a contention manner, it may determine whether the first node can compete with the third node.
  • the first node in FIG. 6 may be an AP, an STA, or the like.
  • the method specifically includes the following steps:
  • Step 601 The first node receives the message sent by the second node, where the message sent by the second node includes spatial multiplexing indication information.
  • Step 602 The first node determines, according to the spatial multiplexing indication information in the message sent by the second node, the channel occupied by the second node in the spatial multiplexing manner, and then occupies the channel through a contention manner and passes the The channel transmits a response message to the second node.
  • step 601 and step 602 can be referred to the description in FIG. 4 and FIG. 5, and details are not described herein again.
  • the first node in FIG. 7 may be an AP, an STA, or the like.
  • the method specifically includes the following steps:
  • Step 701 The first node listens to the message sent by the third node in the channel, and the message sent by the third node includes spatial multiplexing indication information.
  • Step 702 The first node determines, according to the spatial multiplexing indication information in the message sent by the third node, the channel occupied by the third node after being spatially multiplexed, and waits for the channel to occupy the channel after being idle. .
  • step 701 and step 702 can be referred to the description in FIG. 4 and FIG. 5, and details are not described herein again.
  • the message sent by the first node includes spatial multiplexing indication information used to indicate that the first node occupies the channel mode. Therefore, after the other node receives or listens to the message sent by the first node, the first node may be determined. Whether it is a channel occupied by spatial multiplexing or a channel occupied by contention. After the other node determines that the first node is a channel occupied by the spatial multiplexing manner, does not immediately send a response message to the first node; and/or, does not share the channel with the first node by spatial multiplexing, thereby reducing The probability that messages sent between nodes interfere with each other increases the utilization of the channel.
  • the embodiment of the present invention further provides a backoff device, and the specific content of the device may be implemented by referring to the foregoing method, and details are not described herein again.
  • an embodiment of the present invention provides a schematic structural diagram of a backoff device.
  • the apparatus can be used to perform the method illustrated in FIG.
  • the device includes:
  • a starting unit 801 configured to start a backoff counter
  • the processing unit 802 is configured to continue to the backoff counter after the channel corresponding to the determined backoff counter is occupied by the second node by using the spatial multiplexing manner, and the channel cannot be occupied by the second node in a spatial multiplexing manner. Counting or reducing the count value of the backoff counter.
  • processing unit 802 is further configured to:
  • the processing unit 802 decreases the count value of the backoff counter and suspends the backoff Avoid the counter.
  • processing unit 802 is specifically configured to:
  • the count value of the backoff counter is periodically decreased.
  • processing unit 802 is specifically configured to:
  • the rounded value is used as the current count value of the backoff counter.
  • processing unit 802 is specifically configured to:
  • the difference between the current count value of the backoff counter and the threshold is not less than 0, the difference is used as the current count value of the backoff counter.
  • the processing unit 802 determines whether the second node occupies the channel by using a spatial multiplexing manner according to the following manner:
  • the first message sent by the second node to the other node includes spatial multiplexing indication information, where the spatial multiplexing indication information is used to indicate the The two nodes occupy the occupied mode of the channel;
  • the apparatus further comprises a sending unit 803:
  • the sending unit 803 is configured to: after the channel is occupied, send the second message by using the channel, where the second message includes spatial multiplexing indication information, where the spatial multiplexing indication information is used to indicate the first node. Occupy the occupation of the channel.
  • the spatial multiplexing indication information is located in an HE signaling HE-SIG of the message physical header.
  • the device further comprises a receiving unit 804:
  • the receiving unit 804 is configured to receive a third message sent by the third node, where the third message sent by the third node includes spatial multiplexing indication information;
  • the embodiment of the present invention further provides a device for transmitting a message, and the specific content of the device may be implemented by referring to the foregoing method, and details are not described herein again.
  • the embodiment of the present invention provides a schematic structural diagram of a device for transmitting a message.
  • the apparatus can be used to perform the method illustrated in FIG.
  • the device includes:
  • a determining unit 901 configured to determine that the first node is occupying a channel
  • the sending unit 902 is configured to send a message by using the channel, where the message includes spatial multiplexing indication information;
  • the spatial multiplexing indication information is used to indicate that the receiving node of the message determines, according to the spatial multiplexing indication information, that the first node occupies the occupied mode of the channel, and uses the space multiplexing manner in the first node.
  • the receiving node that indicates the message sends the response message to the first node after occupying the channel in a contentive manner; and/or,
  • the spatial multiplexing indication information is used to indicate that the non-receiving node that listens to the channel determines, according to the spatial multiplexing indication information, that the first node occupies the occupied mode of the channel, and passes the space in the first node.
  • the non-receiving node instructing to listen to the channel waits for the channel to occupy the channel after being idle.
  • an embodiment of the present invention provides a schematic structural diagram of a device for transmitting a message.
  • the apparatus can be used to perform the method illustrated in FIG.
  • the apparatus includes:
  • the receiving unit 1001 is configured to receive a message sent by the second node, where the message sent by the second node includes spatial multiplexing indication information;
  • the sending unit 1002 is configured to: according to the spatial multiplexing indication message in the message sent by the second node After determining, by the spatial multiplexing mode, the second node occupies the channel in a contention manner, and sends a response message to the second node by using the channel.
  • the embodiment of the present invention provides a schematic structural diagram of a device for transmitting a message.
  • the apparatus can be used to perform the method illustrated in FIG.
  • the apparatus includes:
  • a listening unit 1101 configured to listen to a message sent by a third node in the channel, where the message sent by the third node includes spatial multiplexing indication information;
  • the determining unit 1102 is configured to determine, according to the spatial multiplexing indication information in the message sent by the third node, the channel occupied by the third node after being spatially multiplexed, and wait for the channel to occupy the channel after being idle.
  • a backoff device 1200 according to an embodiment of the present invention is provided.
  • the apparatus can be used to perform the method illustrated in FIG.
  • the apparatus can include an interface 1201, a processor 1202, a memory 1203, and a transceiver 1204.
  • the processor 1202 is for controlling the operation of the transmitting device 1200;
  • the memory 1203 may include a read only memory and a random access memory for providing instructions and data to the processor 1202.
  • a portion of the memory 1203 may also include non-volatile line random access memory (NVRAM).
  • NVRAM non-volatile line random access memory
  • the various components of the transmitting device 1200 are coupled together by a bus system, wherein the bus system 1209 includes, in addition to the data bus, a power bus, a control bus, and a status signal bus.
  • bus system 1209 includes, in addition to the data bus, a power bus, a control bus, and a status signal bus.
  • various buses are labeled as bus system 1209 in the figure.
  • the processor 1202 is configured to perform the following process:
  • the processor 1202 is further configured to:
  • the first Other neighbor nodes other than the receiving node of the node.
  • the processor 1202 reduces the count value of the backoff counter and suspends the backoff counter.
  • the processor 1202 is specifically configured to:
  • the count value of the backoff counter is periodically decreased.
  • the processor 1202 is specifically configured to:
  • the rounded value is used as the current count value of the backoff counter.
  • the processor 1202 is specifically configured to:
  • the difference between the current count value of the backoff counter and the threshold is not less than 0, the difference is used as the current count value of the backoff counter.
  • the processor 1202 determines whether the second node occupies the channel by spatial multiplexing according to the following manner:
  • the first message sent by the second node to the other node includes spatial multiplexing indication information, where the spatial multiplexing indication information is used to indicate the The two nodes occupy the occupied mode of the channel;
  • the processor 1202 is further configured to:
  • the second message is sent by using the channel, where the second message includes spatial multiplexing indication information, where the spatial multiplexing indication information is used to indicate that the first node occupies the occupied mode of the channel.
  • the spatial multiplexing indication information is located in the HE signaling HE-SIG of the message physical header. in.
  • the processor 1202 is further configured to:
  • a backoff method disclosed in the embodiment of the present invention may be applied to the processor 1202 or implemented by the processor 1202.
  • the steps of the control plane processing flow may be completed by the integrated logic circuit of the hardware in the processor 1202 or the instruction in the form of software.
  • the processor 1202 can be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or perform the embodiments of the present invention.
  • a general purpose processor can be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 1203, and the processor 1202 reads the information in the memory 1203, in conjunction with its hardware, to perform a step of the retreat method.
  • a message transmission apparatus 1300 can be used to perform the method illustrated in FIG.
  • the apparatus can include an interface 1301, a processor 1302, a memory 1303, and a transceiver 1304.
  • the processor 1302 is for controlling the operation of the transmitting device 1300;
  • the memory 1303 may include a read only memory and a random access memory for providing instructions and data to the processor 1302.
  • a portion of the memory 1303 may also include non-volatile line random access memory (NVRAM).
  • NVRAM non-volatile line random access memory
  • the various components of the transmitting device 1300 are coupled together by a bus system, wherein the bus system 1309 includes a power bus, a control bus, and a status signal bus in addition to the data bus.
  • bus system 1309 includes a power bus, a control bus, and a status signal bus in addition to the data bus.
  • various buses are labeled as bus system 1309 in the figure.
  • the processor 1302 is configured to perform the following process:
  • the spatial multiplexing indication information is used to indicate that the receiving node of the message determines, according to the spatial multiplexing indication information, that the first node occupies the occupied mode of the channel, and uses the space multiplexing manner in the first node.
  • the receiving node that indicates the message sends the response message to the first node after occupying the channel in a contentive manner; and/or,
  • the spatial multiplexing indication information is used to indicate that the non-receiving node that listens to the channel determines, according to the spatial multiplexing indication information, that the first node occupies the occupied mode of the channel, and passes the space in the first node.
  • the non-receiving node instructing to listen to the channel waits for the channel to occupy the channel after being idle.
  • a message transmission device 1400 according to an embodiment of the present invention is provided.
  • the apparatus can be used to perform the method illustrated in FIG.
  • the apparatus can include an interface 1401, a processor 1402, a memory 1403, and a transceiver 1404.
  • the processor 1402 is configured to control the operation of the transmitting device 1400;
  • the memory 1403 can include a read only memory and a random access memory for providing instructions and data to the processing unit 1402.
  • a portion of the memory 1403 may also include non-volatile line random access memory (NVRAM).
  • NVRAM non-volatile line random access memory
  • the various components of the transmitting device 1400 are coupled together by a bus system, wherein the bus system 1409 includes a power bus, a control bus, and a status signal bus in addition to the data bus.
  • various buses are labeled as bus system 1409 in the figure.
  • the processor 1402 is configured to perform the following process:
  • the node sends a reply message.
  • a receiving apparatus 1500 according to an embodiment of the present invention.
  • the apparatus can be used to perform the method illustrated in FIG.
  • the device may include: an interface 1501, a processor 1502 Memory 1503 and transceiver 1504.
  • the processor 1502 is for controlling the operation of the receiving device 1500;
  • the memory 1503 may include a read only memory and a random access memory for providing instructions and data to the processor 1502.
  • a portion of the memory 1503 may also include non-volatile line random access memory (NVRAM).
  • NVRAM non-volatile line random access memory
  • the various components of the receiving device 1500 are coupled together by a bus system, wherein the bus system 1509 includes a power bus, a control bus, and a status signal bus in addition to the data bus.
  • various buses are labeled as bus system 1509 in the figure.
  • the processor 1502 is configured to perform the following process:
  • a method for transmitting a message disclosed in the embodiment of the present invention may be applied to the processor 1502 or implemented by the processor 1502.
  • the steps of the control plane processing flow may be completed by the integrated logic circuit of the hardware in the processor 1502 or the instruction in the form of software.
  • the processor 1502 can be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or perform the embodiments of the present invention.
  • a general purpose processor can be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 1503, and the processor 1502 reads the information in the memory 1503, in conjunction with its hardware, to perform a method of transmitting a message method.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention may employ a computer usable memory channel (including but not limited to a disk) in one or more of the computer usable program code embodied therein. A form of computer program product embodied on a memory and optical storage, etc.).
  • the present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG.
  • the computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine instruction for generating instructions executed by a processor of a computer or other programmable data processing device Means for implementing the functions specified in one or more flows of the flowchart or in a block or blocks of the flowchart.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Abstract

一种退避方法及装置,包括:第一节点启动退避计数器;所述第一节点在确定启动的退避计数器对应的信道被第二节点通过空间复用方式占用,且不能通过空间复用方式与第二节点共同占用所述信道后,继续对所述退避计数器进行计数或减少所述退避计数器的计数值。一种传输消息方法和装置,包括:第一节点确定所述第一节点正在占用信道;所述第一节点通过所述信道发送消息,所述消息中包括空间复用指示信息;所述空间复用指示信息用于指示所述消息的接收节点根据所述空间复用指示信息确定所述第一节点占用所述信道的占用方式,并在所述第一节点通过空间复用方式占用所述信道时,指示所述消息的接收节点通过竞争方式占用所述信道后向所述第一节点发送应答消息;和/或,所述空间复用指示信息用于指示侦听所述信道的非接收节点根据所述空间复用指示信息确定所述第一节点占用所述信道的占用方式,并在所述第一节点通过空间复用方式占用所述信道时,指示侦听所述信道的非接收节点等待所述信道空闲后占用所述信道。

Description

一种退避方法、传输消息方法及装置 技术领域
本发明涉及通信技术领域,尤其涉及一种退避方法、传输消息方法及装置。
背景技术
随着移动互联网的发展和智能终端的普及,数据流量快速增长。WLAN(Wireless Local Area Network,无线局域网)凭借高速率和低成本方面的优势,成为主流的移动宽带接入技术之一。
WLAN中的节点通过竞争信道的方式发送消息,一个准备发送消息的STA(Station,站点)或AP(Access Point,接入点)需要采取竞争的机制发送消息。STA或AP在准备发送消息之前,先随机产生一个数作为退避计数器(backoff counter)中的计数值,然后开始监听信道,当确定信道在一个时隙(time slot)内处于空闲状态,则退避计数器中的计数值执行减一操作,当确定信道处于非空闲状态,则退避计数器中的计数值停止减一,直到信道空闲时再继续执行减一操作。当退避计数器中的计数值减到0时,则可以发送消息。上述称为退避(backoff)过程,这种竞争机制可以避免两个节点由于同时发送消息而导致的冲突,但通信效率却不高。
为了提高通信效率,下一代无线局域网标准802.11ax中提出了SR(Spatial Reuse,空间复用)技术,采用SR技术的两个相邻居节点可以同时发送消息。举例来说,如图1所示,为本发明实施例提供的一种多节点分布示意图。图1中,STA3和STA2互相覆盖对方,STA3和STA5互相覆盖,而STA2和STA5距离较远,互相不覆盖。假设STA2要向STA1传输数据,STA3要向STA4传输数据,STA5要向STA6传输数据,此时STA2、STA3、STA5需要竞争信道。结合图1,如图2所示,为本发明实施例提供的一种多节点传输示意图。 图2中STA2、STA3、STA5分别随机生成了初始计数值R1、R2、R3,且R1<R2<R3,因信道空闲,三个STA分别开始计数。STA2首先计数到0,于是开始占用信道并发送消息。在STA2开始发送消息时,STA3侦听到STA2的发送的消息,于是停止计数。同时,STA3需要确定出接收STA2发送的消息的接收功率,并从接收到的STA2发送的消息中获得发送者标识、接收者标识、发送功率等信息。STA3根据这些信息判断若STA3与STA2同时发送消息时,会不会对STA2发送的消息的接收端接收STA2发送的消息产生影响,若确定不会产生影响,则与STA2同时发送。当STA3在侦听STA2发送的消息时,STA5侦听不到STA2以及STA3发送的消息,认为信道空闲,继续计数。之后,在STA3与STA2同时发送消息时,STA5停止计数,直到STA3消息发送结束,STA5再继续计数。需要说明的是,STA3需要在STA2发送消息结束时,同时结束消息的发送,以免影响STA1向STA2发送应答(Acknowledgement,ACK)帧。
上述过程中,原本STA2和STA5发送消息都会导致STA3停止退避过程,而STA5只在STA3发送消息时停止退避过程,在采用SR技术之后,因为STA3与STA2可以同时发送消息,STA2竞争到信道等于帮助STA3占用到信道,导致STA5使用信道的机会大大减少。
综上,在采用SR技术的无线局域网中,被推迟占用信道的节点占用信道的机会会减少,导致该节点无法正常竞争信道,从而减少了该节点对信道的利用率。
发明内容
本发明实施例提供一种退避方法、传输消息方法及装置,用以确保在采用SR技术的无线局域网中,提高被推迟占用信道的节点占用信道的机会。
第一方面,提供一种退避方法,该方法包括:
第一节点启动退避计数器;
所述第一节点在确定启动的退避计数器对应的信道被第二节点通过空间 复用方式占用,且不能通过空间复用方式与第二节点共同占用所述信道后,继续对所述退避计数器进行计数或减少所述退避计数器的计数值。
结合第一方面,在第一方面的第一种可能的实现方式中,所述第一节点不暂停所述退避计数器或减少所述退避计数器的计数值之前,还包括:
所述第一节点确定所述第一节点信号覆盖范围内不存在除了所述第二节点以外的其他邻居节点;或者,
所述第一节点确定所述第一节点信号覆盖范围内不存在除了所述第二节点、所述第一节点的接收节点以外的其他邻居节点。
结合第一方面或者第一方面的第一种可能的实现方式,在第一方面的第二种可能的实现方式中,所述第一节点减少所述退避计数器的计数值并暂停所述退避计数器。
结合第一方面或者第一方面的第一种可能的实现方式,在第一方面的第三种可能的实现方式中,所述第一节点减少所述退避计数器的计数值,包括:
所述第一节点在所述第二节点占用所述信道期间,周期性的减少所述退避计数器的计数值。
结合第一方面或者第一方面的第一种可能的实现方式,在第一方面的第四种可能的实现方式中,所述第一节点减少所述退避计数器的计数值,包括:
所述第一节点将所述退避计数器当前的计数值乘以系数并取整,其中,所述系数大于0且小于1;
所述第一节点将取整后的数值作为所述退避计数器当前的计数值。
结合第一方面或者第一方面的第一种可能的实现方式,在第一方面的第五种可能的实现方式中,所述第一节点减少所述退避计数器的计数值,包括:
若所述退避计数器当前的计数值与阈值的差值小于0,则所述第一节点将0作为所述退避计数器当前的计数值;
若所述退避计数器当前的计数值与所述阈值的差值不小于0,则所述第一节点将所述差值作为所述退避计数器当前的计数值。
结合第一方面或者第一方面的第一种可能的实现方式,在第一方面的第 六种可能的实现方式中,所述第一节点根据下列方式判断所述第二节点是否通过空间复用方式占用所述信道:
所述第一节点侦听所述第二节点发送给其他节点的第一消息,所述第一消息中包括空间复用指示信息,所述空间复用指示信息用于指示所述第二节点占用所述信道的占用方式;
所述第一节点根据所述第一消息中的空间复用指示信息确定所述第二节点是否通过空间复用方式占用所述信道。
结合第一方面或者第一方面的第一种至第六种中的任意一种可能的实现方式,在第一方面的第七种可能的实现方式中,该方法还包括:
所述第一节点在占用信道后,通过所述信道发送第二消息,其中,所述第二消息中包括空间复用指示信息,所述空间复用指示信息用于指示所述第一节点占用所述信道的占用方式。
结合第一方面的第七种可能的实现方式,在第一方面的第八种可能的实现方式中,所述空间复用指示信息位于所述消息物理头的HE信令HE-SIG中。
结合第一方面或者第一方面的第一种至第八种中的任意一种可能的实现方式,在第一方面的第九种可能的实现方式中,该方法还包括:
所述第一节点接收第三节点发送的第三消息,所述第三消息中包括空间复用指示信息;
所述第一节点根据所述第三消息中的空间复用指示信息确定所述第三节点通过空间复用方式占用的信道后,通过竞争方式占用所述信道后通过所述信道向所述第三节点发送应答消息。
第二方面,提供一种传输消息方法,该方法包括:
第一节点确定所述第一节点正在占用信道;
所述第一节点通过所述信道发送消息,所述消息中包括空间复用指示信息;
所述空间复用指示信息用于指示所述消息的接收节点根据所述空间复用指示信息确定所述第一节点占用所述信道的占用方式,并在所述第一节点通 过空间复用方式占用所述信道时,指示所述消息的接收节点通过竞争方式占用所述信道后向所述第一节点发送应答消息;和/或,
所述空间复用指示信息用于指示侦听所述信道的非接收节点根据所述空间复用指示信息确定所述第一节点占用所述信道的占用方式,并在所述第一节点通过空间复用方式占用所述信道时,指示侦听所述信道的非接收节点等待所述信道空闲后占用所述信道。
第三方面,提供一种传输消息方法,该方法包括:
第一节点接收第二节点发送的消息,所述第二节点发送的消息中包括空间复用指示信息;
所述第一节点根据所述第二节点发送的消息中的空间复用指示信息确定所述第二节点通过空间复用方式占用的信道后,通过竞争方式占用所述信道,并通过所述信道向所述第二节点发送应答消息。
第四方面,提供一种传输消息方法,该方法包括:
第一节点侦听信道中第三节点发送的消息,所述第三节点发送的消息中包括空间复用指示信息;
所述第一节点根据所述第三节点发送的消息中的空间复用指示信息确定所述第三节点通过空间复用方式占用的信道后,等待所述信道空闲后占用所述信道。
第五方面,提供一种退避装置,该装置包括:
启动单元,用于启动退避计数器;
处理单元,用于在确定启动的退避计数器对应的信道被第二节点通过空间复用方式占用,且不能通过空间复用方式与第二节点共同占用所述信道后,继续对所述退避计数器进行计数或减少所述退避计数器的计数值。
结合第五方面,在第五方面的第一种可能的实现方式中,所述处理单元还用于:
确定第一节点信号覆盖范围内不存在除了所述第二节点以外的其他邻居节点;或者,
确定所述第一节点信号覆盖范围内不存在除了所述第二节点、所述第一节点的接收节点以外的其他邻居节点。
结合第五方面或者第五方面的第一种可能的实现方式,在第五方面的第二种可能的实现方式中,所述处理单元减少所述退避计数器的计数值并暂停所述退避计数器。
结合第五方面或者第五方面的第一种可能的实现方式,在第五方面的第三种可能的实现方式中,所述处理单元具体用于:
在所述第二节点占用所述信道期间,周期性的减少所述退避计数器的计数值。
结合第五方面或者第五方面的第一种可能的实现方式,在第五方面的第四种可能的实现方式中,所述处理单元具体用于:
将所述退避计数器当前的计数值乘以系数并取整,其中,所述系数大于0且小于1;
将取整后的数值作为所述退避计数器当前的计数值。
结合第五方面或者第五方面的第一种可能的实现方式,在第五方面的第五种可能的实现方式中,所述处理单元具体用于:
若所述退避计数器当前的计数值与阈值的差值小于0,则将0作为所述退避计数器当前的计数值;
若所述退避计数器当前的计数值与所述阈值的差值不小于0,则将所述差值作为所述退避计数器当前的计数值。
结合第五方面或者第五方面的第一种可能的实现方式,在第五方面的第六种可能的实现方式中,所述处理单元根据下列方式判断所述第二节点是否通过空间复用方式占用所述信道:
侦听所述第二节点发送给其他节点的第一消息,所述第一消息中包括空间复用指示信息,所述空间复用指示信息用于指示所述第二节点占用所述信道的占用方式;
根据所述第一消息中的空间复用指示信息确定所述第二节点是否通过空 间复用方式占用所述信道。
结合第五方面或者第五方面的第一种至第六种中的任意一种可能的实现方式,在第五方面的第七种可能的实现方式中,该装置还包括发送单元:
所述发送单元,用于在占用信道后,通过所述信道发送第二消息,其中,所述第二消息中包括空间复用指示信息,所述空间复用指示信息用于指示所述第一节点占用所述信道的占用方式。
结合第五方面的第七种可能的实现方式,所述空间复用指示信息位于所述消息物理头的HE信令HE-SIG中。
结合第五方面或者第五方面的第一种至第八种中的任意一种可能的实现方式,在第五方面的第九种可能的实现方式中,该装置还包括接收单元:
所述接收单元,用于接收第三节点发送的第三消息,所述第三消息中包括空间复用指示信息;
根据所述第三消息中的空间复用指示信息确定所述第三节点通过空间复用方式占用的信道后,通过竞争方式占用所述信道后通过所述信道向所述第三节点发送应答消息。
第六方面,提供一种传输消息装置,该装置包括:
确定单元,用于确定正在占用信道;
发送单元,用于通过所述信道发送消息,所述消息中包括空间复用指示信息,所述空间复用指示信息用于指示所述消息的接收节点根据所述空间复用指示信息确定第一节点占用所述信道的占用方式,并在所述第一节点通过空间复用方式占用所述信道时,指示所述消息的接收节点通过竞争方式占用所述信道后向所述第一节点发送应答消息;和/或,
所述空间复用指示信息用于指示侦听所述信道的非接收节点根据所述空间复用指示信息确定所述第一节点占用所述信道的占用方式,并在所述第一节点通过空间复用方式占用所述信道时,指示侦听所述信道的非接收节点等待所述信道空闲后占用所述信道。
第七方面,提供一种传输消息装置,该装置包括:
接收单元,用于接收第二节点发送的消息,所述第二节点发送的消息中包括空间复用指示信息;
发送单元,用于根据所述第二节点发送的消息中的空间复用指示信息确定所述第二节点通过空间复用方式占用的信道后,通过竞争方式占用所述信道,并通过所述信道向所述第二节点发送应答消息。
第八方面,提供一种传输消息装置,该装置包括:
侦听单元,用于侦听信道中第三节点发送的消息,所述第三节点发送的消息中包括空间复用指示信息;
确定单元,用于根据所述第三节点发送的消息中的空间复用指示信息确定所述第三节点通过空间复用方式占用的信道后,等待所述信道空闲后占用所述信道。
第九方面,提供一种传输消息装置,该装置包括接口、处理器、存储器和收发机:
处理器,用于执行如下流程:
启动退避计数器;
在确定启动的退避计数器对应的信道被第二节点通过空间复用方式占用,且不能通过空间复用方式与第二节点共同占用所述信道后,继续对所述退避计数器进行计数或减少所述退避计数器的计数值。
结合第九方面,在第九方面的第一种可能的实现方式中,处理器还用于:
确定第一节点信号覆盖范围内不存在除了所述第二节点以外的其他邻居节点;或者,
确定所述第一节点信号覆盖范围内不存在除了所述第二节点、所述第一节点的接收节点以外的其他邻居节点。
结合第九方面或者第九方面的第一种可能的实现方式,在第九方面的第二种可能的实现方式中,处理器减少所述退避计数器的计数值并暂停所述退避计数器。
结合第九方面或者第九方面的第一种可能的实现方式,在第九方面的第 三种可能的实现方式中,处理器具体用于:
在所述第二节点占用所述信道期间,周期性的减少所述退避计数器的计数值。
结合第九方面或者第九方面的第一种可能的实现方式,在第九方面的第四种可能的实现方式中,处理器具体用于:
将所述退避计数器当前的计数值乘以系数并取整,其中,所述系数大于0且小于1;
将取整后的数值作为所述退避计数器当前的计数值。
结合第九方面或者第九方面的第一种可能的实现方式,在第九方面的第五种可能的实现方式中,处理器具体用于:
若所述退避计数器当前的计数值与阈值的差值小于0,则将0作为所述退避计数器当前的计数值;
若所述退避计数器当前的计数值与所述阈值的差值不小于0,则将所述差值作为所述退避计数器当前的计数值。
结合第九方面或者第九方面的第一种可能的实现方式,在第九方面的第六种可能的实现方式中,处理器根据下列方式判断所述第二节点是否通过空间复用方式占用所述信道:
侦听所述第二节点发送给其他节点的第一消息,所述第一消息中包括空间复用指示信息,所述空间复用指示信息用于指示所述第二节点占用所述信道的占用方式;
根据所述第一消息中的空间复用指示信息确定所述第二节点是否通过空间复用方式占用所述信道。
结合第九方面或者第九方面的第一种至第六种中的任意一种可能的实现方式,在第九方面的第七种可能的实现方式中,处理器还用于:
在占用信道后,通过所述信道发送第二消息,其中,所述第二消息中包括空间复用指示信息,所述空间复用指示信息用于指示第一节点占用所述信道的占用方式。
结合第九方面的第七种可能的实现方式,在第九方面的第八种可能的实现方式中,所述空间复用指示信息位于所述消息物理头的HE信令HE-SIG中。
结合第九方面或者第九方面的第一种至第八种中的任意一种可能的实现方式,在第九方面的第九种可能的实现方式中,处理器还用于:
接收第三节点发送的第三消息,所述第三消息中包括空间复用指示信息;
根据所述第三消息中的空间复用指示信息确定所述第三节点通过空间复用方式占用的信道后,通过竞争方式占用所述信道后通过所述信道向所述第三节点发送应答消息。
第十方面,提供一种传输消息装置,该装置包括接口、处理器、存储器和收发机:
处理器,用于执行如下流程:
确定正在占用信道;
通过所述信道发送消息,所述消息中包括空间复用指示信息,所述空间复用指示信息用于指示所述消息的接收节点根据所述空间复用指示信息确定第一节点占用所述信道的占用方式,并在所述第一节点通过空间复用方式占用所述信道时,指示所述消息的接收节点通过竞争方式占用所述信道后向所述第一节点发送应答消息;和/或,
所述空间复用指示信息用于指示侦听所述信道的非接收节点根据所述空间复用指示信息确定所述第一节点占用所述信道的占用方式,并在所述第一节点通过空间复用方式占用所述信道时,指示侦听所述信道的非接收节点等待所述信道空闲后占用所述信道。
第十一方面,提供一种传输消息装置,该装置包括接口、处理器、存储器和收发机:
处理器,用于执行如下流程:
接收第二节点发送的消息,所述第二节点发送的消息中包括空间复用指示信息;
根据所述第二节点发送的消息中的空间复用指示信息确定所述第二节点 通过空间复用方式占用的信道后,通过竞争方式占用所述信道,并通过所述信道向所述第二节点发送应答消息。
第十二方面,提供一种传输消息装置,该装置包括接口、处理器、存储器和收发机:
处理器,用于执行如下流程:
侦听信道中第三节点发送的消息,所述第三节点发送的消息中包括空间复用指示信息;
根据所述第三节点发送的消息中的空间复用指示信息确定所述第三节点通过空间复用方式占用的信道后,等待所述信道空闲后占用所述信道。
根据本发明实施例提供的方法及装置,第一节点在确定启动的退避计数器对应的信道被第二节点通过空间复用方式占用,且不能通过空间复用方式与第二节点占用所述信道后,并不是暂停退避计数器,而是继续退避计数器的计数或者减少退避计数器的计数值,从而减少了第一节点在执行退避过程时所需的退避时间,提高了第一节点占用信道的机会,提高了信道的利用率。
附图说明
图1为本发明实施例提供的一种多节点分布示意图;
图2为本发明实施例提供的一种多节点传输示意图;
图3为本发明实施例提供的一种消息结构示意图;
图4为本发明实施例提供的一种退避方法流程示意图;
图5为本发明实施例提供的一种传输消息方法流程示意图;
图6为本发明实施例提供的一种传输消息方法流程示意图;
图7为本发明实施例提供的一种传输消息方法流程示意图;
图8为本发明实施例提供的一种退避装置结构示意图;
图9为本发明实施例提供的一种传输消息装置结构示意图;
图10为本发明实施例提供的一种传输消息装置结构示意图;
图11为本发明实施例提供的一种传输消息装置结构示意图;
图12为本发明实施例提供的另一种退避装置结构示意图;
图13为本发明实施例提供的另一种传输消息装置结构示意图;
图14为本发明实施例提供的另一种传输消息装置结构示意图;
图15为本发明实施例提供的另一种传输消息装置结构示意图。
具体实施方式
为了使本发明的目的、技术方案和优点更加清楚,下面将结合附图对本发明作进一步地详细描述,显然,所描述的实施例仅仅是本发明一部份实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例,都属于本发明保护的范围。
下面结合说明书附图对本发明实施例做详细描述。
本发明实施例中,参与信道竞争的节点在准备发送消息之前,先随机产生一个数作为退避计数器中的计数值,然后开始监听信道并执行退避过程。当节点竞争到信道后,开始在信道中发送消息。当节点在退避过程中确定信道被占用之后,为了确定是否可以与正在占用信道的节点通过空间复用方式共同占用信道,节点还会侦听正在占用信道的节点发送给其他节点的消息,以便确定是否和此节点发送的消息并行发送。
本发明实施例中,节点发送的消息的格式可以如图3所示。图3为本发明实施例提供的一种消息结构示意图。图3中,包括传统前导(legacy preamble)、重复传统信令(Repeated Legacy Signal field,R-L-SIG)、HE前导(High Efficiency preamble)等物理头域以及帧所承载的PSDU(Physical layer Service Data Unit,物理层服务数据单元)。图3中,HE前导包括HE信令(High Efficiency Signal,HE-SIG)、HE短训练序列(High Efficiency Short Training Field,HE-STF)以及HE长训练序列(High Efficiency Long Training Field,HE-LTF)。
基于上述论述,如图4所示,本发明实施例提供的一种退避方法流程示 意图。图4中的第一节点可以为AP、STA等装置,第二节点可以为AP、STA等装置。
如图4所示,该方法具体包括以下步骤:
步骤401:第一节点启动退避计数器;
步骤402:所述第一节点在确定启动的退避计数器对应的信道被第二节点通过空间复用方式占用,且不能通过空间复用方式与第二节点共同占用所述信道后,继续对所述退避计数器进行计数或减少所述退避计数器的计数值。
步骤401中,第一节点启动退避计数器之前,可以先产生一个随机数作为退避计数器的计数值。第一节点启动退避计数器之后,开始监听信道并计数。
举例来说,第一节点确定信道在一个时隙内处于空闲状态时,将退避计数器中的计数值减一。一个时隙的长度一般为无线局域网的标准中预先设定的。
步骤402中,第一节点在占用信道后,可以通过所述信道发送第二消息,其中,所述第二消息中包括空间复用指示信息,所述空间复用指示信息用于指示所述第一节点占用所述信道的占用方式,即空间复用指示信息可以指示出第一节点是通过空间复用方式占用信道还是通过竞争方式占用信道。当其他节点侦听到第一节点发送的第二消息后,可以根据侦听到的第一节点发送的第二消息中的空间复用指示信息确定第一节点占用所述信道的占用方式。
举例来说,空间复用指示信息可以为消息的物理头中的一个比特位,该比特位为预先约定的。例如,当该比特位的取值为0时,表示占用信道的节点是通过执行退避过程占用的信道;当该比特位的取值为1时,表示占用信道的节点是通过空间复用方式占用的信道。需要说明的是,空间复用指示信息也可以用多个比特位表示,本发明实施例对此并不限定。
优选的,空间复用指示信息位于消息的物理头的HE信令HE-SIG中。空间复用指示信息可以是由HE-SIG中任意一个专用比特组成或结合其它指示信息由多个比特组成,本发明实施例对此并不限定。
由于接收节点在接收到发送节点发送的消息之后,需要向发送节点返回一个应答消息,为了避免通过空间复用方式占用信道的节点对被复用的发送节点(通过竞争方式占用信道的节点)接收其接收节点发送的应答消息产生干扰,通过空间复用方式占用信道的节点需要在通过竞争方式占用信道的节点结束占用信道之前,结束正在发送的消息,或者与通过竞争方式占用信道的节点同时结束正在发送的消息。
通过空间复用方式占用信道的节点的接收节点可能会与通过竞争方式占用信道的节点的接收节点同时发送应答消息,从而造成相互干扰。本发明实施例中,通过在发送节点发送的消息中携带空间复用指示信息,接收节点可以根据接收到的消息中的空间复用指示信息确定其对应的发送节点是通过空间复用方式还是竞争方式占用的信道。若接收节点确定发送节点是通过空间复用方式占用信道,则在接收到所述消息后不立即回复应答消息,而是采用竞争方式在竞争到信道后,通过竞争到的信道回复应答消息。需要说明的是,本发明实施例中,接收节点确定发送节点是通过空间复用方式占用信道后,还可以采用其他方式回复应答消息,在此不再赘述。
相应的,结合上面的描述,第一节点接收第三节点发送的第三消息,所述第三节点发送的第三消息中包括空间复用指示信息;所述第一节点根据所述第三节点发送的第三消息中的空间复用指示信息确定所述第三节点通过空间复用方式占用的信道后,通过竞争方式占用所述信道后所述信道向所述第三节点发送应答消息。
需要说明的是,所述空间复用指示信息还可以指示侦听到消息的节点在确定所述侦听到的消息为通过空间复用方式传输时,不再使用空间复用方式与所述通过空间复用方式占用信道的节点并行传输消息,而是等待所述信道空闲后占用所述信道。当然也可以不受此限制。
本发明实施例中,如果第一节点竞争到信道,则通过竞争到的信道发送消息。如果第一节点未竞争到信道,则第一节点可以判断占用信道的第二节点是否为通过空间复用方式共同占用该信道,若是,则直接确定不能通过空 间复用方式共同占用该信道,若否,则判断是否可以与占用信道的第二节点通过空间复用方式共同占用该信道,若可以与占用信道的第二节点通过空间复用方式共同占用该信道,则通过该信道发送消息;第一节点也可以不判断占用信道的第二节点是否通过空间复用方式共同占用该信道,而总是判断是否可以与占用信道的第二节点通过空间复用方式共同占用该信道,若可以与占用信道的第二节点通过空间复用方式共同占用该信道,则通过该信道发送消息。
若第一节点确定信道被第二节点通过空间复用方式占用,且确定不能与第二节点通过空间复用方式共同占用该信道,则可以不暂停所述退避计数器或减少所述退避计数器的计数值。
结合上面的描述,第一节点可以根据下列方式判断第二节点是否通过空间复用方式占用信道:
第一节点侦听所述第二节点发送给其他节点的第一消息,所述第二节点发送给其他节点的第一消息中包括空间复用指示信息,所述空间复用指示信息用于指示所述第二节点占用所述信道的占用方式;所述第一节点根据所述第二节点发送的第一消息中的空间复用指示信息确定所述第二节点是否通过空间复用方式占用所述信道。
第一节点不暂停退避计数器或减少所述退避计数器的计数值之前,还可能需要根据其邻居节点的数量确定是否不暂停退避计数器或减少退避计数器的计数值。
优选的,第一节点不暂停退避计数器或减少所述退避计数器的计数值之前,还可能需要满足以下任意一个条件:
条件一:第一节点确定所述第一节点信号覆盖范围内不存在除了所述第二节点以外的其他邻居节点。
条件二:第一节点确定所述第一节点信号覆盖范围内不存在除了所述第二节点、所述第一节点的接收节点以外的其他邻居节点。
在此条件下,第一节点的接收节点与第一节点建立了连接,且第一节点 是消息发送方,因此该第一节点的接收节点不会竞争信道向其他节点发送消息,可以将其排除。
第一节点若不暂停退避计数器,则所述退避计数器会继续向下计数,若在信道空闲之前,所述退避计数器计数到0,则所述退避计数器一直保持计数为0的状态,并在信道空闲之后占用信道。
第一节点减少退避计数器的计数值的目的是为了在信道空闲时,减少第一节点执行退避过程所需的退避时间,从而提高竞争信道的机会。
优选的,第一节点减少所述退避计数器的计数值并暂停所述退避计数器。
第一节点可以通过多种方式减少退避计数器的计数值,下面分别描述。
第一种可能的实施方式:
第一节点将退避计数器当前的计数值乘以系数并取整,其中,所述系数大于0且小于1;所述第一节点将取整后的数值作为所述退避计数器当前的计数值。
举例来说,退避计数器当前的计数值为A,A≥0。第一节点将A乘以系数B,0<B<1,获得C=A×B,对C进行取整后,将C作为退避计数器当前的计数值,即用C对A进行替换。此时,在信道空闲时,第一节点的退避计数器从C开始执行退避过程。
需要说明的是,在进行取整时,可以向下取整,也可以向上取整,本发明实施例对此并不限定。
第二种可能的实施方式:
若退避计数器当前的计数值与阈值的差值小于0,则第一节点将0作为所述退避计数器当前的计数值;
若所述退避计数器当前的计数值与所述阈值的差值不小于0,则所述第一节点将所述差值作为所述退避计数器当前的计数值。
举例来说,退避计数器当前的计数值为A,A≥0。第一节点将A减去阈值B,获得C=A-B。然后判断C是否小于0,若C小于0,则将0作为退避计数器当前的计数值,否则将C作为退避计数器当前的计数值,即用C对A 进行替换。此时,在信道空闲时,第一节点的退避计数器从C开始执行退避过程。
需要说明的是,阈值为正整数,阈值可以每次随机生成,可以预先约定,也可以根据退避计数器当前的计数值确定,本发明实施例对此并不限定。
优选的,根据第二节点通过空间复用方式占用信道的时间长度确定所述阈值,具体的,将第二节点通过空间复用方式占用信道的时间长度除以折减系数后获得所述阈值,所述折减系数大于1。
举例来说,第二节点通过空间复用方式占用信道的时间长度为200微秒,折减系数为20,则获得的阈值为10=200/20。
第三种可能的实施方式:
第一节点在所述第二节点占用所述信道期间,周期性的减少所述退避计数器的计数值。
举例来说,第一节点在每个周期将退避计数器当前的计数值减去一个固定值或者随机值,当退避计数器当前的计数值减为小于0时,第一节点将0作为所述退避计数器当前的计数值。
第一节点在确定信道空闲时,判断退避计数器当前的计数值是否为0,若为0,则占用信道,否则根据退避计数器当前的计数值执行退避过程。
上述方案中,第一节点在确定启动的退避计数器对应的信道被第二节点通过空间复用方式占用,且不能通过空间复用方式与第二节点占用所述信道后,并不是暂停退避计数器,而是继续退避计数器的计数或者减少退避计数器的计数值,从而减少了第一节点在执行退避过程时所需的退避时间,提高了第一节点占用信道的机会,提高了信道的利用率。
节点之间通过空间复用方式共同占用信道可以有效的提高信道的利用效率,但有可能更容易造成隐藏节点问题,使冲突概率提高,所以最好是当一个节点使用空间复用方式与一个正在传输消息的节点并行传输消息时,它周围的节点能知道这是一个使用空间复用方式的传输,从而不再进一步使用空间复用方式与这个节点并行传输。
基于上述论述,如图5所示,本发明实施例提供的一种传输消息方法流程示意图。图5中的第一节点可以为AP、STA等装置。
如图5所示,该方法具体包括以下步骤:
步骤501:第一节点确定所述第一节点正在占用信道;
步骤502:所述第一节点通过所述信道发送消息,所述消息中包括空间复用指示信息;所述空间复用指示信息用于指示所述消息的接收节点根据所述空间复用指示信息确定所述第一节点占用所述信道的占用方式,并在所述第一节点通过空间复用方式占用所述信道时,指示所述消息的接收节点通过竞争方式占用所述信道后向所述第一节点发送应答消息;和/或,所述空间复用指示信息用于指示侦听所述信道的非接收节点根据所述空间复用指示信息确定所述第一节点占用所述信道的占用方式,并在所述第一节点通过空间复用方式占用所述信道时,指示侦听所述信道的非接收节点等待所述信道空闲后占用所述信道。
步骤501中,第一节点可以通过竞争方式占用信道,也可以通过空间复用方式占用信道。
需要说明的是,第一节点具体如何占用信道,本发明实施例对此并不限定。
步骤502中,接收节点为与消息中携带的目的地址对应的节点,对应的,非接收节点为与消息中携带的目的地址不对应的节点。由于节点会侦听信道,接收到的消息可能并不是发送给自己的。
因此,第一节点通过所述信道发送消息之后,接收到消息的节点可能为第一节点发送的消息的接收节点;也可能为正在侦听所述信道的其他节点,即非接收节点。
第一节点发送的消息中的空间复用指示信息可以为消息物理头中的一个比特位,该比特位为预先约定的。例如,当该比特位的取值为0时,表示占用信道的节点是通过执行退避过程占用的信道;当该比特位的取值为1时,表示占用信道的节点是通过空间复用方式占用的信道。
需要说明的是,空间复用指示信息也可以用多个比特位表示,本发明实施例对此并不限定。
优选的,空间复用指示信息位于消息的物理头的HE信令HE-SIG中。空间复用指示信息可以是由HE-SIG中任意一个专用比特组成或结合其它指示信息由多个比特组成,本发明实施例对此并不限定。
若第一节点发送的消息的接收节点根据所述空间复用指示信息确定所述第一节点通过竞争方式占用所述信道时,该接收节点按照现有无线局域网的标准中规定的方式向所述第一节点发送应答消息。例如,在所述第一节点消息发送结束后,通过该信道向所述第一节点发送应答消息。
需要说明的是,第一节点发送的消息的接收节点确定所述第一节点通过竞争方式占用所述信道时,也可以按照其他方式向所述第一节点发送应答消息,本发明实施例对此并不限定。
若第一节点发送的消息的接收节点根据所述空间复用指示信息确定所述第一节点通过空间复用方式占用所述信道时,通过竞争方式占用所述信道后向所述第一节点发送应答消息。
侦听所述信道的非接收节点根据所述空间复用指示信息确定所述第一节点通过竞争方式占用所述信道时,可能会确定是否可以与所述第一节点共同占用信道,若该非接收节确定可以,则通过空间复用方式与所述第一节点共同占用所述信道。
第一节点在未占用信道时,可能会侦听信道或者接收第二节点发送的消息。
第一节点在接收第二节点发送的消息时,会根据第二节点占用信道的占用方式确定如何发送应答消息给第二节点。具体的,第一节点接收第二节点发送的消息,所述第二节点发送的消息中包括空间复用指示信息;所述第一节点根据所述第二节点发送的消息中的空间复用指示信息确定所述第二节点通过空间复用方式占用的信道后,通过竞争方式占用所述信道,并通过所述信道向所述第二节点发送应答消息。所述第一节点根据所述第二节点发送的 消息中的空间复用指示信息确定所述第二节点通过竞争方式占用的信道后,按照现有无线局域网的标准中规定的方式向所述第一节点发送应答消息。
第一节点在侦听信道时,会根据正在占用信道的第三节点占用信道的占用方式确定是否通过空间复用方式与所述第三节点共同占用信道。具体的,第一节点侦听所述信道中第三节点发送的消息,所述第三节点发送的消息中包括空间复用指示信息;所述第一节点根据所述第三节点发送的消息中的空间复用指示信息确定所述第三节点通过空间复用方式占用的信道后,确定不通过空间复用方式与所述第三节点共同占用信道,而是等待所述信道空闲后占用所述信道。若第一节点根据所述第三节点发送的消息中的空间复用指示信息确定所述第三节点通过竞争方式占用的信道后,可能会判断第一节点是否可以与所述第三节点通过竞争方式占用的信道,并在确定可以与所述第三节点通过竞争方式占用的信道后,通过所述信道发送消息。
基于上述论述,如图6所示,本发明实施例提供的一种传输消息方法流程示意图。图6中的第一节点可以为AP、STA等装置。
如图6所示,该方法具体包括以下步骤:
步骤601:第一节点接收第二节点发送的消息,所述第二节点发送的消息中包括空间复用指示信息;
步骤602:所述第一节点根据所述第二节点发送的消息中的空间复用指示信息确定所述第二节点通过空间复用方式占用的信道后,通过竞争方式占用所述信道,并通过所述信道向所述第二节点发送应答消息。
需要说明的是,步骤601以及步骤602的具体内容可以参考图4以及图5中的描述,在此不再赘述。
基于上述论述,如图7所示,本发明实施例提供的一种传输消息方法流程示意图。图7中的第一节点可以为AP、STA等装置。
如图7所示,该方法具体包括以下步骤:
步骤701:第一节点侦听信道中第三节点发送的消息,所述第三节点发送的消息中包括空间复用指示信息;
步骤702:所述第一节点根据所述第三节点发送的消息中的空间复用指示信息确定所述第三节点通过空间复用方式占用的信道后,等待所述信道空闲后占用所述信道。
需要说明的是,步骤701以及步骤702的具体内容可以参考图4以及图5中的描述,在此不再赘述。
上述方案中,第一节点发送的消息中包括用于指示第一节点占用信道方式的空间复用指示信息,因此当其他节点接收或者侦听到第一节点发送的消息之后,可以确定第一节点是通过空间复用方式占用的信道还是通过竞争方式占用的信道。在其他节点确定第一节点是通过空间复用方式占用的信道之后,不立即向第一节点发送应答消息;和/或,不通过空间复用方式与所述第一节点共同占用信道,从而减少了节点之间发送的消息互相干扰的几率,提高了信道的利用率。
针对上述方法流程,本发明实施例还提供一种退避装置,该装置的具体内容可以参照上述方法实施,在此不再赘述。
如图:8所示,本发明实施例提供一种退避装置结构示意图。
该装置可以用于执行图4所示的方法。
参见图8,该装置包括:
启动单元801,用于启动退避计数器;
处理单元802,用于在确定启动的退避计数器对应的信道被第二节点通过空间复用方式占用,且不能通过空间复用方式与第二节点共同占用所述信道后,继续对所述退避计数器进行计数或减少所述退避计数器的计数值。
优选的,所述处理单元802还用于:
确定第一节点信号覆盖范围内不存在除了所述第二节点以外的其他邻居节点;或者,
确定所述第一节点信号覆盖范围内不存在除了所述第二节点、所述第一节点的接收节点以外的其他邻居节点。
优选的,所述处理单元802减少所述退避计数器的计数值并暂停所述退 避计数器。
优选的,所述处理单元802具体用于:
在所述第二节点占用所述信道期间,周期性的减少所述退避计数器的计数值。
优选的,所述处理单元802具体用于:
将所述退避计数器当前的计数值乘以系数并取整,其中,所述系数大于0且小于1;
将取整后的数值作为所述退避计数器当前的计数值。
优选的,所述处理单元802具体用于:
若所述退避计数器当前的计数值与阈值的差值小于0,则将0作为所述退避计数器当前的计数值;
若所述退避计数器当前的计数值与所述阈值的差值不小于0,则将所述差值作为所述退避计数器当前的计数值。
优选的,所述处理单元802根据下列方式判断所述第二节点是否通过空间复用方式占用所述信道:
侦听所述第二节点发送给其他节点的第一消息,所述第二节点发送给其他节点的第一消息中包括空间复用指示信息,所述空间复用指示信息用于指示所述第二节点占用所述信道的占用方式;
根据所述第二节点发送的第一消息中的空间复用指示信息确定所述第二节点是否通过空间复用方式占用所述信道。
优选的,该装置还包括发送单元803:
所述发送单元803,用于在占用信道后,通过所述信道发送第二消息,其中,所述第二消息中包括空间复用指示信息,所述空间复用指示信息用于指示第一节点占用所述信道的占用方式。
优选的,所述空间复用指示信息位于所述消息物理头的HE信令HE-SIG中。
优选的,该装置还包括接收单元804:
所述接收单元804,用于接收第三节点发送的第三消息,所述第三节点发送的第三消息中包括空间复用指示信息;
根据所述第三节点发送的第三消息中的空间复用指示信息确定所述第三节点通过空间复用方式占用的信道后,通过竞争方式占用所述信道后通过所述信道向所述第三节点发送应答消息。
针对上述方法流程,本发明实施例还提供一种传输消息装置,该装置的具体内容可以参照上述方法实施,在此不再赘述。
如图9所示,本发明实施例提供一种传输消息装置结构示意图。
该装置可以用于执行图5所示的方法。
参见图9,该装置包括:
确定单元901,用于确定所述第一节点正在占用信道;
发送单元902,用于通过所述信道发送消息,所述消息中包括空间复用指示信息;
所述空间复用指示信息用于指示所述消息的接收节点根据所述空间复用指示信息确定第一节点占用所述信道的占用方式,并在所述第一节点通过空间复用方式占用所述信道时,指示所述消息的接收节点通过竞争方式占用所述信道后向所述第一节点发送应答消息;和/或,
所述空间复用指示信息用于指示侦听所述信道的非接收节点根据所述空间复用指示信息确定所述第一节点占用所述信道的占用方式,并在所述第一节点通过空间复用方式占用所述信道时,指示侦听所述信道的非接收节点等待所述信道空闲后占用所述信道。
如图10所示,本发明实施例提供一种传输消息装置结构示意图。
该装置可以用于执行图6所示的方法。
参见图10,该装置包括:
接收单元1001,用于接收第二节点发送的消息,所述第二节点发送的消息中包括空间复用指示信息;
发送单元1002,用于根据所述第二节点发送的消息中的空间复用指示信 息确定所述第二节点通过空间复用方式占用的信道后,通过竞争方式占用所述信道,并通过所述信道向所述第二节点发送应答消息。
如图11所示,本发明实施例提供一种传输消息装置结构示意图。
该装置可以用于执行图7所示的方法。
参见图11,该装置包括:
侦听单元1101,用于侦听信道中第三节点发送的消息,所述第三节点发送的消息中包括空间复用指示信息;
确定单元1102,用于根据所述第三节点发送的消息中的空间复用指示信息确定所述第三节点通过空间复用方式占用的信道后,等待所述信道空闲后占用所述信道。
基于相同构思,参见图12,为本发明实施例提供的一种退避装置1200。该装置可以用于执行图4所示的方法。该装置可包括:接口1201、处理器1202、存储器1203和收发机1204。处理器1202用于控制发送装置1200的操作;存储器1203可以包括只读存储器和随机存取存储器,用于向处理器1202提供指令和数据。存储器1203的一部分还可以包括非易失行随机存取存储器(NVRAM)。发送装置1200的各个组件通过总线系统耦合在一起,其中总线系统1209除包括数据总线之外,还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见,在图中将各种总线都标为总线系统1209。
处理器1202,用于执行如下流程:
启动退避计数器;
在确定启动的退避计数器对应的信道被第二节点通过空间复用方式占用,且不能通过空间复用方式与第二节点共同占用所述信道后,继续对所述退避计数器进行计数或减少所述退避计数器的计数值。
优选的,处理器1202还用于:
确定第一节点信号覆盖范围内不存在除了所述第二节点以外的其他邻居节点;或者,
确定所述第一节点信号覆盖范围内不存在除了所述第二节点、所述第一 节点的接收节点以外的其他邻居节点。
优选的,处理器1202减少所述退避计数器的计数值并暂停所述退避计数器。
优选的,处理器1202具体用于:
在所述第二节点占用所述信道期间,周期性的减少所述退避计数器的计数值。
优选的,处理器1202具体用于:
将所述退避计数器当前的计数值乘以系数并取整,其中,所述系数大于0且小于1;
将取整后的数值作为所述退避计数器当前的计数值。
优选的,处理器1202具体用于:
若所述退避计数器当前的计数值与阈值的差值小于0,则将0作为所述退避计数器当前的计数值;
若所述退避计数器当前的计数值与所述阈值的差值不小于0,则将所述差值作为所述退避计数器当前的计数值。
优选的,处理器1202根据下列方式判断所述第二节点是否通过空间复用方式占用所述信道:
侦听所述第二节点发送给其他节点的第一消息,所述第二节点发送给其他节点的第一消息中包括空间复用指示信息,所述空间复用指示信息用于指示所述第二节点占用所述信道的占用方式;
根据所述第二节点发送的第一消息中的空间复用指示信息确定所述第二节点是否通过空间复用方式占用所述信道。
优选的,处理器1202还用于:
在占用信道后,通过所述信道发送第二消息,其中,所述第二消息中包括空间复用指示信息,所述空间复用指示信息用于指示第一节点占用所述信道的占用方式。
优选的,所述空间复用指示信息位于所述消息物理头的HE信令HE-SIG 中。
优选的,处理器1202还用于:
接收第三节点发送的第三消息,所述第三节点发送的第三消息中包括空间复用指示信息;
根据所述第三节点发送的第三消息中的空间复用指示信息确定所述第三节点通过空间复用方式占用的信道后,通过竞争方式占用所述信道后通过所述信道向所述第三节点发送应答消息。
本发明实施例揭示的一种退避方法可以应用于处理器1202中,或者由处理器1202实现。在实现过程中,控制面处理流程的各步骤可以通过处理器1202中的硬件的集成逻辑电路或者软件形式的指令完成。处理器1202可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件,可以实现或者执行本发明实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本发明实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成,或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器,闪存、只读存储器,可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器1203,处理器1202读取存储器1203中的信息,结合其硬件完成一种退避方法的步骤。
基于相同构思,参见图13,为本发明实施例提供的一种传输消息装置1300。该装置可以用于执行图5所示的方法。该装置可包括:接口1301、处理器1302、存储器1303和收发机1304。处理器1302用于控制发送装置1300的操作;存储器1303可以包括只读存储器和随机存取存储器,用于向处理器1302提供指令和数据。存储器1303的一部分还可以包括非易失行随机存取存储器(NVRAM)。发送装置1300的各个组件通过总线系统耦合在一起,其中总线系统1309除包括数据总线之外,还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见,在图中将各种总线都标为总线系统1309。
处理器1302,用于执行如下流程:
确定正在占用信道;
通过所述信道发送消息,所述消息中包括空间复用指示信息;
所述空间复用指示信息用于指示所述消息的接收节点根据所述空间复用指示信息确定第一节点占用所述信道的占用方式,并在所述第一节点通过空间复用方式占用所述信道时,指示所述消息的接收节点通过竞争方式占用所述信道后向所述第一节点发送应答消息;和/或,
所述空间复用指示信息用于指示侦听所述信道的非接收节点根据所述空间复用指示信息确定所述第一节点占用所述信道的占用方式,并在所述第一节点通过空间复用方式占用所述信道时,指示侦听所述信道的非接收节点等待所述信道空闲后占用所述信道。
基于相同构思,参见图14,为本发明实施例提供的一种传输消息装置1400。该装置可以用于执行图6所示的方法。该装置可包括:接口1401、处理器1402、存储器1403和收发机1404。处理器1402用于控制发送装置1400的操作;存储器1403可以包括只读存储器和随机存取存储器,用于向处理单元1402提供指令和数据。存储器1403的一部分还可以包括非易失行随机存取存储器(NVRAM)。发送装置1400的各个组件通过总线系统耦合在一起,其中总线系统1409除包括数据总线之外,还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见,在图中将各种总线都标为总线系统1409。
处理器1402,用于执行如下流程:
接收第二节点发送的消息,所述第二节点发送的消息中包括空间复用指示信息;
根据所述第二节点发送的消息中的空间复用指示信息确定所述第二节点通过空间复用方式占用的信道后,通过竞争方式占用所述信道,并通过所述信道向所述第二节点发送应答消息。
基于相同构思,参见图15,为本发明实施例提供的一种接收装置1500。该装置可以用于执行图7所示的方法。该装置可包括:接口1501、处理器1502、 存储器1503和收发机1504。处理器1502用于控制接收装置1500的操作;存储器1503可以包括只读存储器和随机存取存储器,用于向处理器1502提供指令和数据。存储器1503的一部分还可以包括非易失行随机存取存储器(NVRAM)。接收装置1500的各个组件通过总线系统耦合在一起,其中总线系统1509除包括数据总线之外,还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见,在图中将各种总线都标为总线系统1509。
处理器1502,用于执行如下流程:
侦听信道中第三节点发送的消息,所述第三节点发送的消息中包括空间复用指示信息;
根据所述第三节点发送的消息中的空间复用指示信息确定所述第三节点通过空间复用方式占用的信道后,等待所述信道空闲后占用所述信道。
本发明实施例揭示的一种传输消息方法可以应用于处理器1502中,或者由处理器1502实现。在实现过程中,控制面处理流程的各步骤可以通过处理器1502中的硬件的集成逻辑电路或者软件形式的指令完成。处理器1502可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件,可以实现或者执行本发明实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本发明实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成,或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器,闪存、只读存储器,可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器1503,处理器1502读取存储器1503中的信息,结合其硬件完成一种传输消息方法的步骤。
本领域内的技术人员应明白,本发明的实施例可提供为方法、系统、或计算机程序产品。因此,本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储信道(包括但不限于磁盘 存储器和光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器指令,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然,本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变型在内。

Claims (39)

  1. 一种退避方法,其特征在于,该方法包括:
    第一节点启动退避计数器;
    所述第一节点在确定启动的退避计数器对应的信道被第二节点通过空间复用方式占用,且不能通过空间复用方式与第二节点共同占用所述信道后,继续所述退避计数器的计数或减少所述退避计数器的计数值。
  2. 根据权利要求1所述的方法,其特征在于,所述第一节点不暂停所述退避计数器或减少所述退避计数器的计数值之前,还包括:
    所述第一节点确定所述第一节点信号覆盖范围内不存在除了所述第二节点以外的其他邻居节点;或者,
    所述第一节点确定所述第一节点信号覆盖范围内不存在除了所述第二节点、所述第一节点的接收节点以外的其他邻居节点。
  3. 根据权利要求1至2任一项所述的方法,其特征在于,所述第一节点减少所述退避计数器的计数值并暂停所述退避计数器。
  4. 根据权利要求1至2任一项所述的方法,其特征在于,所述第一节点减少所述退避计数器的计数值,包括:
    所述第一节点在所述第二节点占用所述信道期间,周期性的减少所述退避计数器的计数值。
  5. 根据权利要求1至2任一项所述的方法,其特征在于,所述第一节点减少所述退避计数器的计数值,包括:
    所述第一节点将所述退避计数器当前的计数值乘以系数并取整,其中,所述系数大于0且小于1;
    所述第一节点将取整后的数值作为所述退避计数器当前的计数值。
  6. 根据权利要求1至2任一项所述的方法,其特征在于,所述第一节点减少所述退避计数器的计数值,包括:
    若所述退避计数器当前的计数值与阈值的差值小于0,则所述第一节点将 0作为所述退避计数器当前的计数值;
    若所述退避计数器当前的计数值与所述阈值的差值不小于0,则所述第一节点将所述差值作为所述退避计数器当前的计数值。
  7. 根据权利要求1至2任一项所述的方法,其特征在于,所述第一节点根据下列方式判断所述第二节点是否通过空间复用方式占用所述信道:
    所述第一节点侦听所述第二节点发送给其他节点的第一消息,所述第一消息中包括空间复用指示信息,所述空间复用指示信息用于指示所述第二节点占用所述信道的占用方式;
    所述第一节点根据所述第一消息中的空间复用指示信息确定所述第二节点是否通过空间复用方式占用所述信道。
  8. 根据权利要求1至7任一项所述的方法,其特征在于,该方法还包括:
    所述第一节点在占用信道后,通过所述信道发送第二消息,其中,所述第二消息中包括空间复用指示信息,所述空间复用指示信息用于指示所述第一节点占用所述信道的占用方式。
  9. 根据权利要求8所述的方法,其特征在于,所述空间复用指示信息位于所述消息物理头的HE信令HE-SIG中。
  10. 根据权利要求1至9任一项所述的方法,其特征在于,该方法还包括:
    所述第一节点接收第三节点发送的第三消息,所述第三消息中包括空间复用指示信息;
    所述第一节点根据所述第三消息中的空间复用指示信息确定所述第三节点通过空间复用方式占用的信道后,通过竞争方式占用所述信道后通过所述信道向所述第三节点发送应答消息。
  11. 一种传输消息方法,其特征在于,该方法包括:
    第一节点确定所述第一节点正在占用信道;
    所述第一节点通过所述信道发送消息,所述消息中包括空间复用指示信息;
    所述空间复用指示信息用于指示所述消息的接收节点根据所述空间复用指示信息确定所述第一节点占用所述信道的占用方式,并在所述第一节点通过空间复用方式占用所述信道时,指示所述消息的接收节点通过竞争方式占用所述信道后向所述第一节点发送应答消息;和/或,
    所述空间复用指示信息用于指示侦听所述信道的非接收节点根据所述空间复用指示信息确定所述第一节点占用所述信道的占用方式,并在所述第一节点通过空间复用方式占用所述信道时,指示侦听所述信道的非接收节点等待所述信道空闲后占用所述信道。
  12. 一种传输消息方法,其特征在于,该方法包括:
    第一节点接收第二节点发送的消息,所述第二节点发送的消息中包括空间复用指示信息;
    所述第一节点根据所述第二节点发送的消息中的空间复用指示信息确定所述第二节点通过空间复用方式占用的信道后,通过竞争方式占用所述信道,并通过所述信道向所述第二节点发送应答消息。
  13. 一种传输消息方法,其特征在于,该方法包括:
    第一节点侦听信道中第三节点发送的消息,所述第三节点发送的消息中包括空间复用指示信息;
    所述第一节点根据所述第三节点发送的消息中的空间复用指示信息确定所述第三节点通过空间复用方式占用的信道后,等待所述信道空闲后占用所述信道。
  14. 一种退避装置,其特征在于,该装置包括:
    启动单元,用于启动退避计数器;
    处理单元,用于在确定启动的退避计数器对应的信道被第二节点通过空间复用方式占用,且不能通过空间复用方式与第二节点共同占用所述信道后,继续对所述退避计数器进行计数或减少所述退避计数器的计数值。
  15. 根据权利要求14所述的装置,其特征在于,所述处理单元还用于:
    确定所述第一节点信号覆盖范围内不存在除了所述第二节点以外的其他 邻居节点;或者,
    确定所述第一节点信号覆盖范围内不存在除了所述第二节点、所述第一节点的接收节点以外的其他邻居节点。
  16. 根据权利要求14至15任一项所述的装置,其特征在于,所述处理单元减少所述退避计数器的计数值并暂停所述退避计数器。
  17. 根据权利要求14至15任一项所述的装置,其特征在于,所述处理单元具体用于:
    在所述第二节点占用所述信道期间,周期性的减少所述退避计数器的计数值。
  18. 根据权利要求14至15任一项所述的装置,其特征在于,所述处理单元具体用于:
    将所述退避计数器当前的计数值乘以系数并取整,其中,所述系数大于0且小于1;
    将取整后的数值作为所述退避计数器当前的计数值。
  19. 根据权利要求14至15任一项所述的装置,其特征在于,所述处理单元具体用于:
    若所述退避计数器当前的计数值与阈值的差值小于0,则将0作为所述退避计数器当前的计数值;
    若所述退避计数器当前的计数值与所述阈值的差值不小于0,则将所述差值作为所述退避计数器当前的计数值。
  20. 根据权利要求14至15任一项所述的装置,其特征在于,所述处理单元根据下列方式判断所述第二节点是否通过空间复用方式占用所述信道:
    侦听所述第二节点发送给其他节点的第一消息,所述第一消息中包括空间复用指示信息,所述空间复用指示信息用于指示所述第二节点占用所述信道的占用方式;
    根据所述第一消息中的空间复用指示信息确定所述第二节点是否通过空间复用方式占用所述信道。
  21. 根据权利要求14至20任一项所述的装置,其特征在于,该装置还包括发送单元:
    所述发送单元,用于在占用信道后,通过所述信道发送第二消息,其中,所述第二消息中包括空间复用指示信息,所述空间复用指示信息用于指示第一节点占用所述信道的占用方式。
  22. 根据权利要求21所述的装置,其特征在于,所述空间复用指示信息位于所述消息物理头的HE信令HE-SIG中。
  23. 根据权利要求14至22任一项所述的装置,其特征在于,该装置还包括接收单元:
    所述接收单元,用于接收第三节点发送的第三消息,所述第三消息中包括空间复用指示信息;
    根据所述第三消息中的空间复用指示信息确定所述第三节点通过空间复用方式占用的信道后,通过竞争方式占用所述信道后通过所述信道向所述第三节点发送应答消息。
  24. 一种传输消息装置,其特征在于,该装置包括:
    确定单元,用于确定正在占用信道;
    发送单元,用于通过所述信道发送消息,所述消息中包括空间复用指示信息;所述空间复用指示信息用于指示所述消息的接收节点根据所述空间复用指示信息确定第一节点占用所述信道的占用方式,并在所述第一节点通过空间复用方式占用所述信道时,指示所述消息的接收节点通过竞争方式占用所述信道后向所述第一节点发送应答消息;和/或,
    所述空间复用指示信息用于指示侦听所述信道的非接收节点根据所述空间复用指示信息确定所述第一节点占用所述信道的占用方式,并在所述第一节点通过空间复用方式占用所述信道时,指示侦听所述信道的非接收节点等待所述信道空闲后占用所述信道。
  25. 一种传输消息装置,其特征在于,该装置包括:
    接收单元,用于接收第二节点发送的消息,所述第二节点发送的消息中 包括空间复用指示信息;
    发送单元,用于根据所述第二节点发送的消息中的空间复用指示信息确定所述第二节点通过空间复用方式占用的信道后,通过竞争方式占用所述信道,并通过所述信道向所述第二节点发送应答消息。
  26. 一种传输消息装置,其特征在于,该装置包括:
    侦听单元,用于侦听信道中第三节点发送的消息,所述第三节点发送的消息中包括空间复用指示信息;
    确定单元,用于根据所述第三节点发送的消息中的空间复用指示信息确定所述第三节点通过空间复用方式占用的信道后,等待所述信道空闲后占用所述信道。
  27. 一种退避装置,其特征在于,该装置包括接口、处理器、存储器和收发机:
    处理器,用于执行如下流程:
    启动退避计数器;
    在确定启动的退避计数器对应的信道被第二节点通过空间复用方式占用,且不能通过空间复用方式与第二节点共同占用所述信道后,继续对所述退避计数器进行计数或减少所述退避计数器的计数值。
  28. 根据权利要求27所述的装置,其特征在于,所述处理器还用于:
    确定所述第一节点信号覆盖范围内不存在除了所述第二节点以外的其他邻居节点;或者,
    确定所述第一节点信号覆盖范围内不存在除了所述第二节点、所述第一节点的接收节点以外的其他邻居节点。
  29. 根据权利要求27至28任一项所述的装置,其特征在于,所述处理器减少所述退避计数器的计数值并暂停所述退避计数器。
  30. 根据权利要求27至28任一项所述的装置,其特征在于,所述处理器具体用于:
    在所述第二节点占用所述信道期间,周期性的减少所述退避计数器的计 数值。
  31. 根据权利要求27至28任一项所述的装置,其特征在于,所述处理单元具体用于:
    将所述退避计数器当前的计数值乘以系数并取整,其中,所述系数大于0且小于1;
    将取整后的数值作为所述退避计数器当前的计数值。
  32. 根据权利要求27至28任一项所述的装置,其特征在于,所述处理器具体用于:
    若所述退避计数器当前的计数值与阈值的差值小于0,则将0作为所述退避计数器当前的计数值;
    若所述退避计数器当前的计数值与所述阈值的差值不小于0,则将所述差值作为所述退避计数器当前的计数值。
  33. 根据权利要求27至28任一项所述的装置,其特征在于,所述处理器根据下列方式判断所述第二节点是否通过空间复用方式占用所述信道:
    侦听所述第二节点发送给其他节点的第一消息,所述第一消息中包括空间复用指示信息,所述空间复用指示信息用于指示所述第二节点占用所述信道的占用方式;
    根据所述第一消息中的空间复用指示信息确定所述第二节点是否通过空间复用方式占用所述信道。
  34. 根据权利要求27至34任一项所述的装置,其特征在于,所述处理器还用于:
    在占用信道后,通过所述信道发送第二消息,其中,所述第二消息中包括空间复用指示信息,所述空间复用指示信息用于指示第一节点占用所述信道的占用方式。
  35. 根据权利要求34所述的装置,其特征在于,所述空间复用指示信息位于所述消息物理头的HE信令HE-SIG中。
  36. 根据权利要求27至35任一项所述的装置,其特征在于,所述处理 器还用于:
    接收第三节点发送的第三消息,所述第三消息中包括空间复用指示信息;
    根据所述第三消息中的空间复用指示信息确定所述第三节点通过空间复用方式占用的信道后,通过竞争方式占用所述信道后通过所述信道向所述第三节点发送应答消息。
  37. 一种传输消息装置,其特征在于,该装置包括接口、处理器、存储器和收发机:
    处理器,用于执行如下流程:
    确定正在占用信道;
    通过所述信道发送消息,所述消息中包括空间复用指示信息;所述空间复用指示信息用于指示所述消息的接收节点根据所述空间复用指示信息确定第一节点占用所述信道的占用方式,并在所述第一节点通过空间复用方式占用所述信道时,指示所述消息的接收节点通过竞争方式占用所述信道后向所述第一节点发送应答消息;和/或,
    所述空间复用指示信息用于指示侦听所述信道的非接收节点根据所述空间复用指示信息确定所述第一节点占用所述信道的占用方式,并在所述第一节点通过空间复用方式占用所述信道时,指示侦听所述信道的非接收节点等待所述信道空闲后占用所述信道。
  38. 一种传输消息装置,其特征在于,该装置包括接口、处理器、存储器和收发机:
    处理器,用于执行如下流程:
    接收第二节点发送的消息,所述第二节点发送的消息中包括空间复用指示信息;
    根据所述第二节点发送的消息中的空间复用指示信息确定所述第二节点通过空间复用方式占用的信道后,通过竞争方式占用所述信道,并通过所述信道向所述第二节点发送应答消息。
  39. 一种传输消息装置,其特征在于,该装置包括接口、处理器、存储 器和收发机:
    处理器,用于执行如下流程:
    侦听信道中第三节点发送的消息,所述第三节点发送的消息中包括空间复用指示信息;
    根据所述第三节点发送的消息中的空间复用指示信息确定所述第三节点通过空间复用方式占用的信道后,等待所述信道空闲后占用所述信道。
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CN101421990A (zh) * 2006-04-13 2009-04-29 高通股份有限公司 动态载波侦听阈值
CN101102178A (zh) * 2007-07-10 2008-01-09 北京航空航天大学 多信道选择多址接入方法
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