WO2013123901A1 - 分组聚合的数据传输方法、接入点、中继节点和数据节点 - Google Patents

分组聚合的数据传输方法、接入点、中继节点和数据节点 Download PDF

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Publication number
WO2013123901A1
WO2013123901A1 PCT/CN2013/071812 CN2013071812W WO2013123901A1 WO 2013123901 A1 WO2013123901 A1 WO 2013123901A1 CN 2013071812 W CN2013071812 W CN 2013071812W WO 2013123901 A1 WO2013123901 A1 WO 2013123901A1
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WIPO (PCT)
Prior art keywords
relay node
aggregation
node
mac frame
data
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PCT/CN2013/071812
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English (en)
French (fr)
Inventor
伍天宇
陈晨
戴志巍
李长乐
Original Assignee
华为技术有限公司
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP13751673.8A priority Critical patent/EP2800312B1/en
Publication of WO2013123901A1 publication Critical patent/WO2013123901A1/zh
Priority to US14/465,548 priority patent/US9843961B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • H04B7/15Active relay systems
    • H04B7/155Ground-based stations
    • H04B7/15528Control of operation parameters of a relay station to exploit the physical medium
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W40/00Communication routing or communication path finding
    • H04W40/02Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/12Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W40/00Communication routing or communication path finding
    • H04W40/02Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point

Definitions

  • Embodiments of the present invention relate to the field of wireless communications, and specifically design a packet aggregation data transmission method, an access point, a relay node, and a data node. Background technique
  • the existing standards Although the data rate of the physical layer is significantly improved, the advantage of the data rate increase cannot be reflected in the MAC layer due to the inherent system overhead of the Media Access Control (MAC).
  • MAC Media Access Control
  • the existing standard proposes a frame aggregation mechanism.
  • the essence of the frame aggregation mechanism is that multiple data frames share a single MAC frame header, which simplifies the frame structure and eliminates the interframe space and the competition time between the previous data frames, thereby improving the effective throughput of the MAC layer.
  • MAC layer service data unit aggregation (Aggregation-MAC Service) is used in the standard.
  • A-MSDU Aggregation-MAC Protocol Data Unit
  • A-MPDU Aggregation-MAC Protocol Data Unit
  • a packet aggregation mechanism is used in existing standards to increase the weight of the payload.
  • a common node aggregates data, it needs to wait for a certain period of time, and the aggregated data can reach a certain transmission scale, which greatly increases the delay of the data, which obviously cannot guarantee the service quality of the delay-sensitive service.
  • AP Access Point
  • the energy consumption of itself will be severe.
  • the energy problems of nodes are more prominent due to the large-scale nature of their networks.
  • Data Nodes In the process of sending aggregated data to the destination node, the collision collision problem caused by hidden terminal problems is also serious. Summary of the invention
  • the embodiment of the invention provides a data transmission method for packet aggregation, which selectively uses the relay node to perform data aggregation, so that the aggregated packet data quickly reaches the transmission scale, and the packet data is sent to the destination node in a short time. , which significantly improves the service quality of the delay-sensitive application business. the amount.
  • a data transmission method for packet aggregation includes:
  • an aggregation relay node configured to aggregate, by the data node, a media access control MAC frame that is sent to the access point AP and forwarded by the aggregation relay node;
  • the aggregated MAC frame is a MAC frame sent by the data node that is aggregated by the aggregation relay node.
  • MAC frame includes aggregation indication information for indicating aggregation of the MAC frame
  • the MAC frames are aggregated according to the aggregation indication information in the MAC frame to form an aggregated MAC frame.
  • the aggregated MAC frame is forwarded to the access point AP.
  • a data transmission method for packet aggregation comprising: determining an aggregation relay node for aggregating an uplink MAC frame;
  • the MAC frame includes an aggregation indication information for indicating aggregation of the MAC frame
  • an access point comprising:
  • a processing unit configured to determine, in the service area, an aggregation relay node, configured to aggregate, by the data node, a MAC frame that is sent to the access point AP and forwarded by the aggregation relay node;
  • the receiving unit receives the aggregated MAC frame sent by the aggregation relay node, where the aggregated MAC frame is a MAC frame sent by the data node that is aggregated by the aggregation relay node.
  • a relay node comprising:
  • a receiving unit configured to receive a media access control MAC frame sent by the data node, where the MAC frame includes aggregation indication information used to indicate that the MAC frame is aggregated;
  • a processing unit configured to aggregate the MAC frames according to the aggregation indication information in the MAC frame to form an aggregate MAC frame
  • a sending unit configured to forward the aggregated MAC frame to the access point AP.
  • a data node the data node includes:
  • a processing unit configured to determine an aggregation relay node for aggregating MAC frames
  • a sending unit configured to send a MAC frame to the aggregation relay node, where the MAC frame includes aggregation indication information used to indicate that the MAC frame is aggregated.
  • the relay node is selectively used for data aggregation, so that the aggregated packet data quickly reaches the transmission scale, and the packet data is sent to the destination node in a short time, thereby significantly improving the delay-sensitive type. The quality of service of the application business.
  • the relay node since only the relay node performs data aggregation, it effectively ensures that other nodes do not generate energy consumption due to packet aggregation work. Since the relay node sends the aggregated packet data to the destination node, the number of nodes participating in the data transmission is reduced, which is beneficial to alleviate the hidden terminal problem.
  • FIG. 1 is a schematic flow chart of a method in accordance with an embodiment of the present invention.
  • FIG. 2 is a schematic flow chart of a method in accordance with an embodiment of the present invention.
  • FIG. 3 is a schematic flow chart of a method in accordance with an embodiment of the present invention.
  • FIGS. 4A and 4B are schematic structural diagrams of an access point according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a relay node according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a data node according to an embodiment of the present invention. detailed description
  • a node directly sends data to an AP through one hop, which causes a large amount of uplink data.
  • the amount of data on the downlink is often small.
  • the embodiment of the present invention considers that only the uplink data is subjected to packet aggregation, and only the relay node performs packet aggregation, and the aggregation mode can use the existing aggregation mechanisms of the A-MSDU and the A-MPDU in the existing manner.
  • the data node can forward the data of the application aggregation to the relay node, and after the relay node performs packet aggregation, the data is sent to the destination (for example, the AP).
  • FIG. 1 is a schematic flow chart of a packet aggregation data transmission method 100 according to an embodiment of the present invention.
  • the method can be applied to a WLAN system in which wireless communication is performed between an access point AP and a subscriber station SAT. As shown in FIG. 1, the method 100 includes:
  • the AP determines, in the service area, an aggregation relay node for aggregating data, and is used to aggregate, by the data node, a MAC frame that is sent to the access point AP and forwarded by the aggregation relay node.
  • the AP receives the aggregated MAC frame sent by the aggregation relay node, where the aggregated MAC frame is a MAC frame sent by the data node that is aggregated by the aggregation relay node.
  • the AP when determining an aggregate relay node for aggregating data in a service area, the AP sends a first configuration message, such as a broadcast frame, to a pre-selected relay node in the service area according to a predetermined algorithm.
  • the first configuration message carries the aggregation indication information, where the aggregation indication information is used to indicate that the pre-selected relay nodes are used as an aggregation relay node, and the aggregation data node sends the information to the AP and forwards the data through the aggregation relay node.
  • MAC frame the aggregation indication information
  • the AP may also select some of the relay nodes in the service area as the aggregation relay node according to preset conditions. For example, the AP may select the highest or higher communication signal strength between the AP and the AP.
  • the node is used as an aggregation relay node to ensure that the aggregated data frames are transmitted to the AP at a higher rate, thereby satisfying the sensitive requirements of different application services for delay and improving the throughput of the network. In this case, the AP may not notify the part of the relay node.
  • the AP may also select an aggregation relay node according to the current network environment.
  • the AP may send a beacon to all relay nodes in the service area; then the AP receives an acknowledgement frame for the beacon sent by each of the all relay nodes, where The acknowledgement frame carries the strength information of the received signal of each of the relay nodes, such as Received Signal Strength Indication (RSSI).
  • RSSI Received Signal Strength Indication
  • the AP may select one or more relay nodes having the highest received signal strength as the aggregate relay node according to the strength information of the received signal of each relay node in the acknowledgement frame.
  • the AP may send a second configuration message to the data node, where the second configuration message carries the aggregate relay node indication information, and the aggregate relay node indication information is used to indicate that the data node is to be sent to The AP and the aggregated MAC frame are sent to the aggregation relay node.
  • the second configuration message may be a broadcast frame sent by the AP within the service area. After receiving the second configuration message, the data node learns the aggregation relay node in the service area of the AP.
  • the data node may be based on preset conditions, such as relay node location information or signal strength information of the relay node to the data node. Or channel condition information, selecting an aggregation relay node to relay the MAC frame sent by the data node to the AP. For example, an aggregate relay node with the highest communication signal strength between the data nodes may be selected to aggregate the MAC frames sent by the data node to the AP.
  • the aggregate relay nodes selected by different data nodes may be the same or different. Even if the aggregation relay nodes selected by different data nodes are different, the number of relay nodes participating in the aggregation data is limited, so that the aggregated packet data can be quickly reached to the transmission scale.
  • the data relay node may notify the data node by itself.
  • the aggregation relay node may send a configuration message, such as a broadcast frame or a multicast frame, to the data node, where the configuration message carries the aggregate relay node indication information, and the aggregate relay node indication information is used to indicate the data node.
  • a MAC frame sent to the AP and required to be aggregated is sent to the aggregation relay node.
  • the aggregation relay node may also be a preset relay node.
  • the AP is not required to select the aggregation relay node, and the aggregation relay node may send a configuration message, such as a broadcast frame or a multicast frame, to the data node, where the configuration message carries the aggregate relay node indication information,
  • the aggregate relay node indication information is used to indicate that the data node sends a MAC frame that is sent to the AP and needs to be aggregated to the aggregation relay node.
  • the data node After the data node selects an aggregation relay node for aggregating the MAC frame sent by the data node, it may send a MAC frame to the aggregation relay node, and apply for an aggregation relay node to aggregate the data, and then send the data to the destination node.
  • the destination node is an AP.
  • the following is an example of the communication process between a data node and an aggregation relay node.
  • a specific bit combination of Type Subtype for example, 10 1101, may be used to indicate a MAC frame sent to the aggregation relay node and applied for aggregation.
  • the aggregation relay node After receiving the MAC frame, the aggregation relay node parses and determines that the MAC frame is the data for which the application is aggregated. According to an embodiment of the present invention, the destination address field in the MAC frame may be assigned (Address 1 ) to the address of the aggregation relay node, thereby omitting the sending station address field (Address 3 ) and the receiving station address field (Address 4).
  • the DA domain of all the aggregated subframes can be removed, only in the MPDU header.
  • the address of the AP can be placed in the destination address field (Address 1 ) of (Header). This can greatly reduce system overhead.
  • the AP sends a block acknowledgement frame to the aggregate relay node for confirmation according to the situation of receiving the data, or the aggregate relay node sends a block acknowledgement request frame to the AP as needed, and then the AP passes the block acknowledgement frame. Undergo verification.
  • the corresponding receiving station address field (RA) where the AP address is placed is omitted
  • the transmitting station address (TA) is the address of the aggregate relay node.
  • the corresponding transmitting station address (TA) field in which the AP address is placed is omitted
  • the receiving station address (RA) is set as the address of the aggregate relay node.
  • the service area may be pre-divided into a plurality of groups according to a preset grouping rule, and each group includes a plurality of data nodes and at least one relay node.
  • each group includes a plurality of data nodes and at least one relay node.
  • one or more relay nodes are selected as relay relay nodes among the relay nodes in the group, and are used to aggregate uplink MAC frames sent by the data nodes in the group to the AP.
  • the AP is centered and the service area is evenly divided into six seamless sectors of equal angle.
  • the AP can be equipped with an omnidirectional antenna and a sector antenna, while other nodes, including data nodes and intermediate nodes, are only equipped with omnidirectional antennas.
  • the AP uses sectoral antennas to poll each sector in turn using beacons.
  • the beacon contains the sector identifier (SID), and the data node and the relay node that received the beacon know the sector in which they are located, and then all the power supplies are continuously powered.
  • the relay node sends an acknowledgement frame to the AP, and the AP selects some relay nodes from the relay nodes that have strong communication signals with themselves as the aggregate relay node of the sector, and then sends a configuration message to the sector again.
  • a broadcast frame where the broadcast frame carries the aggregate relay node indication information, where the aggregate relay node indication information is used to indicate that the data node in the sector sends the MAC frame to the AP and needs to be aggregated to the sector group.
  • the AP polls 6 sectors in sequence to complete network initialization.
  • the AP uses an omnidirectional antenna to send a broadcast frame to the service area, with a frame interval in the frame, informing all sectors that the service can be started, and the aggregate relay node in the sector to be served. Through the competition, a request is sent to the AP during this frame interval.
  • the AP determines the sorting information of the aggregate relay node in each sector according to a preset rule, and then the AP switches the sector antenna to the sector ranked first according to the sort information.
  • the aggregate relay node in the sector that obtains the service starts to send an aggregated MAC frame to the AP, where the aggregated MAC frame is a MAC frame sent by the data node in the sector aggregated by the aggregate relay node in the sector.
  • the sector antenna is switched to the next sector in the sort to notify the sector.
  • the aggregation relay node sends an aggregated MAC frame to the AP.
  • the above is a method of an embodiment of the invention described from the perspective of an access point.
  • the method of the embodiment of the present invention is further explained from the perspective of a relay node and a data node, respectively.
  • method 200 includes:
  • the relay node receives a MAC frame sent by the data node, where the MAC frame includes aggregation indication information used to indicate that the MAC frame is aggregated;
  • the relay node aggregates the MAC frames according to the aggregation indication information in the MAC frame to form an aggregate MAC frame.
  • the relay node forwards the aggregated MAC frame to the AP.
  • the method 200 may include the following steps:
  • the relay node receives a first configuration message sent by the AP, where the first configuration message is used to indicate that the relay node is used as an aggregation relay.
  • a node, in which the aggregated data node sends a MAC frame forwarded to the AP and forwarded by the relay node.
  • the method 200 may include, before step 210, according to the embodiment of the present invention.
  • the aggregation relay node sends a second configuration message to the data node, where the second configuration message carries the indication information of the aggregation relay node, and the indication information of the aggregation relay node is used to indicate that the data node is to be sent to the
  • the AP and the aggregated MAC frame are sent to the aggregation relay node.
  • method 300 includes:
  • the data node determines an aggregate relay node for aggregating uplink MAC frames
  • the data node sends a MAC frame to the aggregation relay node, where the MAC frame includes aggregation indication information used to indicate aggregation of the MAC frame.
  • the method 300 further includes: the data node receiving the first configuration message sent by the point AP, where the first configuration message carries the aggregation relay node indication information, and the aggregation relay node indication information And transmitting, to the aggregation relay node, a MAC frame that is sent by the data node to the AP and needs to be aggregated.
  • the method 300 further includes:
  • a MAC frame is transmitted to the selected one of the aggregate relay nodes.
  • the method 300 includes: the data node receiving the second configuration message sent by the aggregation relay node, where the second configuration message carries the aggregation Following the node indication information, the aggregation relay node indication information is used to indicate that the data node sends a MAC frame that is sent to the AP and needs to be aggregated to the aggregation relay node.
  • each second configuration message may carry an RSSI
  • the data node performs relaying in multiple aggregations according to the RSSI in the second configuration message.
  • One of the nodes is selected, for example, the aggregation relay node with the largest RSSI is selected, and then the MAC frame is sent to the selected aggregation relay node.
  • the relay node is selectively used for data aggregation, so that the aggregated packet data quickly reaches the transmission scale, and the packet data is sent to the destination node in a short time, thereby significantly improving the delay-sensitive type.
  • the quality of service of the application business is selectively used for data aggregation, so that the aggregated packet data quickly reaches the transmission scale, and the packet data is sent to the destination node in a short time, thereby significantly improving the delay-sensitive type.
  • the relay node since only the relay node performs data aggregation, it effectively ensures that other nodes do not generate energy consumption due to packet aggregation work. Since the relay node sends the aggregated packet data to the destination node, the number of nodes participating in the data transmission is reduced, which is beneficial to alleviate the hidden terminal problem.
  • an access point, a relay node, and a data node for implementing the data transmission method of the embodiment of the present invention are also proposed.
  • These access points or relay nodes or data nodes may be access points or user stations STAs in a WLAN system.
  • FIG. 4A and 4B are schematic structural diagrams of an access point 400 according to an embodiment of the present invention.
  • the access point 400 can be used to implement an AP in the method of the embodiment of the present invention.
  • the access point 400 includes: a processing unit 410, configured to determine, in the service area, an aggregation relay node for aggregating data, where the aggregation data node sends to the access point AP and performs the aggregation. a MAC frame forwarded by the relay node;
  • the receiving unit 420 is configured to receive the aggregated MAC frame sent by the aggregation relay node, where the aggregated MAC frame is a MAC frame sent by the data node that is aggregated by the aggregation relay node.
  • the processing unit 410 preselects a relay node
  • the access point 400 further includes a sending unit 430, configured to be forwarded by the processing unit to the service area.
  • the selected relay node sends a first configuration message, where the first configuration message carries the aggregation indication information, where the aggregation indication information is used to indicate that the relay node is used as the aggregation relay node to aggregate data nodes.
  • a MAC frame transmitted to the access point AP and forwarded by the aggregate relay node.
  • the processing unit 410 is configured to determine, as the aggregate relay node, a part of all relay nodes in the service area according to the preset condition.
  • the sending unit 430 is further configured to send a second configuration message to the data node, where the second configuration message carries an indication information of the aggregation relay node, where the information of the aggregation relay node is used for Instructing the data node to send a MAC frame addressed to the AP and requiring aggregation to the aggregate relay node.
  • the sending unit 430 is configured to send a beacon to all relay nodes in the service area
  • the receiving unit 420 is configured to receive an acknowledgment frame for the beacon sent by each of the all relay nodes, where the acknowledgment frame carries strength information of the received signal of each of the relay nodes;
  • the processing unit 410 is configured to select one or more relay nodes with the highest strength of the received signal as the aggregation relay node according to the strength information of the received signal of each of the relay nodes in the acknowledgement frame.
  • the processing unit 410 is further configured to divide the service area into a plurality of groups according to a preset grouping rule, where each of the plurality of groups includes multiple relay nodes and multiple data nodes. ;
  • the sending unit 430 is configured to send a beacon to the multiple relay nodes in a specific one of the plurality of groups;
  • the receiving unit 420 is configured to receive an acknowledgement frame for the beacon sent by the multiple relay nodes in each group, where the acknowledgement frame carries the multiple relay nodes in the specific one group The strength information of the received signal;
  • the processing unit 410 is configured to select, according to the strength information of the received signals of the multiple relay nodes in the specific one of the groups, the one or more relay nodes with the highest received signal strength as the Specifically, a d, group of aggregation relay nodes.
  • the sending unit 430 is specifically configured to send the second configuration message to the multiple data nodes in the specific one group, where the second configuration message carries an indication information of an aggregation relay node.
  • the aggregation relay node indication information is used to indicate that the multiple data nodes in the specific one group send a MAC frame that is sent to the AP and needs to be aggregated to the aggregation in the specific one group. Following the node.
  • the receiving unit 420 is specifically configured to receive an aggregated MAC frame sent by the aggregation relay node in the specific one group, where the aggregated MAC frame is the one in the specific one group Aggregating the plurality of data nodes in the specific one group of the relay node aggregation The MAC frame sent.
  • FIG. 5 is a schematic structural diagram of a relay node 500 according to an embodiment of the present invention, and the relay node 500 can be used as an aggregation relay node for implementing the method of the embodiment of the present invention.
  • the relay node 500 includes:
  • the receiving unit 510 is configured to receive a media access control MAC frame sent by the data node, where the MAC frame includes aggregation indication information used to indicate that the MAC frame is aggregated;
  • the processing unit 520 is configured to aggregate the MAC frames according to the aggregation indication information in the MAC frame to form an aggregate MAC frame.
  • the sending unit 530 is configured to forward the aggregated MAC frame to the access point AP.
  • the receiving unit 510 is configured to receive a first configuration message sent by the AP, where the first configuration message is used to indicate that the relay node is used as an aggregation relay node, and the aggregation data node sends the data to the AP. And the MAC frame forwarded by the relay node.
  • the sending unit 530 is configured to send a second configuration message to the data node, where the second configuration message carries an indication information of the aggregation relay node, where the information of the aggregation relay node is used to indicate
  • the data node sends a MAC frame that is sent to the AP and needs to be aggregated to the aggregation relay node.
  • FIG. 6 is a schematic block diagram of a data node 600 that can be used as a data node to implement the method of an embodiment of the present invention, in accordance with an embodiment of the present invention.
  • the data node 600 includes: a processing unit 610, configured to determine an aggregate relay node for aggregating an uplink MAC frame;
  • the sending unit 620 is configured to send a MAC frame to the aggregation relay node, where the MAC frame includes aggregation indication information used to indicate that the MAC frame is aggregated.
  • the data node 600 further includes:
  • the receiving unit 630 is configured to receive a first configuration message that is sent by the access point AP, where the first configuration message carries the indication information of the aggregation relay node, where the indication information of the aggregation relay node is used to indicate that the data node is to send A MAC frame that is to the AP and needs to be aggregated is sent to the aggregation relay node.
  • the processing unit 610 is specifically configured to select one of the multiple aggregation relay nodes according to a preset condition.
  • the aggregation relay node is configured to send a MAC frame to the selected one of the aggregation relay nodes.
  • the receiving unit 630 is configured to receive a second configuration message that is sent by the aggregation relay node, where the second configuration message carries an indication information of the aggregation relay node, where the aggregation
  • the relay node indication information is used to indicate that the data node sends a MAC frame that is sent to the AP and needs to be aggregated to the aggregation relay node.
  • the receiving unit 630 is configured to receive multiple second configuration messages sent by the multiple aggregation relay nodes, where the multiple second configuration messages respectively carry a signal strength indicator RSSI.
  • the processing unit 610 is configured to select one of the aggregate relay nodes according to the RSSI in the multiple second configuration messages.
  • the sending unit 620 is configured to send a MAC frame to the selected one of the aggregation relay nodes.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
  • the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.
  • the components displayed by the unit may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as a standalone product It can be stored on a computer readable storage medium.
  • the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

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Abstract

本发明实施例涉及分组聚合的数据传输方法、接入点、中继节点和数据节点。分组聚合的数据传输方法,包括:在服务区域内中确定聚合中继节点,用于聚合数据节点向接入点AP发送并经所述聚合中继节点转发的媒体接入控制MAC帧;接收所述聚合中继节点发送的聚合MAC帧,其中所述聚合MAC帧为所述聚合中继节点聚合的所述数据节点发送的MAC帧。根据本发明实施例,有选择地利用中继节点进行数据聚合,使得聚合的分组数据快速达到发送规模,实现了分组数据在较短的时间内发送到目的节点,从而显著改善了时延敏感型应用业务的服务质量。

Description

分组聚合的数据传输方法、 接入点、 中继节点和数据节点 技术领域
本发明实施例涉及无线通信领域, 具体设计分组聚合的数据传输方法、 接 入点、 中继节点和数据节点。 背景技术
在现有标准中, 虽然物理层的数据速率有了显著提高, 但是由于媒体接入 控制层(Media Access Control, 简称 MAC ) 固有的系统开销, 数据速率提高的 优势无法在 MAC层体现出来。 为了减小附加开销的影响, 现有标准提出了帧聚 合机制。帧聚合机制的本质为多个数据帧共用一个 MAC帧头,以此简化帧结构, 消除了以往数据帧之间的帧间间隔和竟争时间,从而提高了 MAC层的有效吞吐 量。
目前, 标准中釆用了 MAC层服务数据单元聚合 ( Aggregation-MAC Service
Data Unit, 简称 A-MSDU )和 MAC层协议数据单元聚合 ( Aggregation-MAC Protocol Data Unit, 简称 A-MPDU ) 两种聚合机制。
在现有标准中釆用了分组聚合机制, 以此来提高有效载荷的比重。 但是, 普通节点在聚合数据时, 需要等待一定的时间, 聚合的数据才能达到一定的发 送规模, 这会大大增加数据的时延, 这显然不能保证时延敏感业务的服务质量。 而且,节点聚合不同应用的分组数据,并将聚合的分组数据发送给接入点(Access Point, 简称 AP )的过程中, 很难保证不同应用对时延的敏感要求。 普通节点在 进行聚合时, 对自身的能量消耗会很严重。 在现有的的应用场景下, 如智能电 网 (smart grid ), 由于其网络的大规模性, 节点的能量问题更为突出。 数据节点 将聚合好的数据发送到目的节点的过程中, 由于隐藏终端问题引起的冲突碰撞 问题也很严重。 发明内容
本发明实施例提出了一种分组聚合的数据传输方法, 有选择地利用中继节 点进行数据聚合, 使得聚合的分组数据快速达到发送规模, 实现了分组数据在 较短的时间内发送到目的节点, 从而显著改善了时延敏感型应用业务的服务质 量。
一方面, 提出了一种分组聚合的数据传输方法, 所述方法包括:
在服务区域内中确定聚合中继节点,用于聚合数据节点向接入点 AP发送并 经所述聚合中继节点转发的媒体接入控制 MAC帧;
接收所述聚合中继节点发送的聚合 MAC帧, 其中所述聚合 MAC帧为所述 聚合中继节点聚合的所述数据节点发送的 MAC帧。
另一方面, 提出了一种分组聚合的传输方法, 所述方法包括:
接收数据节点发送的媒体接入控制 MAC帧, 其中所述 MAC帧包括用于指 示对所述 MAC帧进行聚合的聚合指示信息;
根据所述 MAC帧中的所述聚合指示信息, 将所述 MAC帧进行聚合, 形成 聚合 MAC帧;
向接入点 AP转发所述聚合 MAC帧。
另一方面, 提出了一种分组聚合的数据传输方法, 所述方法包括: 确定用于聚合上行 MAC帧的聚合中继节点;
向所述聚合中继节点发送 MAC帧, 其中所述 MAC帧包括用于指示对所述 MAC帧进行聚合的聚合指示信息
另一方面, 提出了一种接入点, 所述接入点包括:
处理单元, 用于在服务区域内中确定聚合中继节点, 用于聚合数据节点向 接入点 AP发送并经所述聚合中继节点转发的 MAC帧;
接收单元,接收所述聚合中继节点发送的聚合 MAC帧,其中所述聚合 MAC 帧为所述聚合中继节点聚合的所述数据节点发送的 MAC帧。
另一方面, 提出了一种中继节点, 所述中继节点包括:
接收单元,用于接收数据节点发送的媒体接入控制 MAC帧,其中所述 MAC 帧包括用于指示对所述 MAC帧进行聚合的聚合指示信息;
处理单元, 用于根据所述 MAC帧中的所述聚合指示信息, 将所述 MAC帧 进行聚合, 形成聚合 MAC帧;
发送单元, 用于向接入点 AP转发所述聚合 MAC帧。
另一方面, 一种数据节点, 所述数据节点包括:
处理单元, 用于确定用于聚合 MAC帧的聚合中继节点;
发送单元, 用于向所述聚合中继节点发送 MAC帧, 其中所述 MAC帧包括 用于指示对所述 MAC帧进行聚合的聚合指示信息。 根据本发明实施例, 有选择地利用中继节点进行数据聚合, 使得聚合的分 组数据快速达到发送规模, 实现了分组数据在较短的时间内发送到目的节点, 从而显著改善了时延敏感型应用业务的服务质量。
同时, 由于仅有中继节点进行数据聚合, 有效保证了其他节点不会因分组 聚合工作而产生能耗。 由于中继节点将聚合后的分组数据发往目的节点, 相当 于参与数据传输的节点数目减少, 有利于緩解隐藏终端问题。 附图说明
图 1是根据本发明实施例的方法的示意流程图;
图 2是根据本发明实施例的方法的示意流程图;
图 3是根据本发明实施例的方法的示意流程图;
图 4A和 4B是根据本发明实施例的接入点的示意结构图;
图 5是根据本发明实施例的中继节点的示意结构图;
图 6是根据本发明实施例的数据节点的示意结构图。 具体实施方式
下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案进行清 楚、 完整地描述, 显然, 所描述的实施例是本发明一部分实施例, 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作出创造性劳 动前提下所获得的所有其他实施例, 都属于本发明保护的范围。
在实际应用场景下, 在无线局域网 WLAN中多数情况下是节点通过一跳直 接将数据发送给 AP,这样会导致上行数据量会很大。而下行的数据量往往很小。 本发明实施例考虑只对上行数据进行分组聚合, 并仅在中继节点进行分组聚合, 聚合方式可釆用现有中的 A-MSDU和 A-MPDU两种聚合机制。数据节点可以将 申请聚合的数据转发给中继节点, 在中继节点进行分组聚合后, 再将数据发送 到目的地(例如 AP )。 这样, 可以使聚合的分组快速达到发送规模, 实现分组 在尽短的时间内发往目的节点, 从而在一定程度上满足应用业务对时延的不同 敏感程度要求。 同时, 利用中继节点进行分组聚合, 可以保证其他普通节点, 特别是对能量敏感的节点, 不会因为分组聚合工作而产生消耗能量的问题。 另 外, 由中继节点进行聚合分组的发送, 相当于参与传输的节点数目变少, 这也 可以很好地緩解隐藏终端问题。 图 1是根据本发明实施例的分组聚合的数据传输方法 100的示意流程图, 该方法可以应用于 WLAN系统中, 接入点 AP与用户站点 SAT之间进行无线通 信。 如图 1所示, 方法 100包括:
110: AP 在服务区域内中确定用于聚合数据的聚合中继节点, 用于聚合数 据节点向接入点 AP发送并经所述聚合中继节点转发的 MAC帧;
120: AP接收所述聚合中继节点发送的聚合 MAC帧, 其中所述聚合 MAC 帧为所述聚合中继节点聚合的所述数据节点发送的 MAC帧。
根据本发明实施例, AP在确定服务区域内的用于聚合数据的聚合中继节点 时, 根据预定的算法, 在服务区域内预先选定的中继节点发送第一配置消息, 例如一个广播帧, 该第一配置消息携带聚合指示信息, 所述聚合指示信息用于 指示这些预先选定的中继节点用作聚合中继节点,以聚合数据节点向 AP发送并 经所述聚合中继节点转发的 MAC帧。
或者, AP也可以根据预设的条件选择服务区域内的全部中继节点中的部分 中继节点作为所述聚合中继节点, 例如, 可以选择与 AP之间通信信号强度最高 或者较高的中继节点作为聚合中继节点, 这样可以保证聚合后的数据帧以较高 的速率传输给 AP, 由此既能满足不同应用业务对于时延的敏感需求, 又能提高 网络的吞吐量。 在这种情况下, AP可以不通知这部分中继节点。
根据本发明实施例, AP也可以根据当前网络环境选择聚合中继节点。 在这 种情况下 AP 可以向服务区域内的全部中继节点发送信标(beacon ); 然后 AP 接收所述全部中继节点中的每一个中继节点发送的针对所述信标的确认帧, 其 中所述确认帧携带所述每一个中继节点接收信号的强度信息, 例如接收信号强 度指示( Received Signal Strength Indication, 简称 RSSI )。 AP可以根据确认帧中 每一个中继节点的接收信号的强度信息 , 选择接收信号的强度最大的一个或者 多个中继节点作为聚合中继节点。
AP选定聚合中继节点之后, 可以通知数据节点。 根据本发明实施例, AP 可以向数据节点发送第二配置消息, 其中所述第二配置消息携带聚合中继节点 指示信息,所述聚合中继节点指示信息用于指示所述数据节点将发往所述 AP并 需要聚合的 MAC帧发送至所述聚合中继节点。 第二配置消息可以是 AP在服务 区域内发送的广播帧。数据节点接收到第二配置消息之后, 获知 AP的服务区域 内的聚合中继节点。 在聚合中继节点有多个的情况下, 数据节点可以根据预设 的条件, 例如中继节点位置信息或者中继节点到所述数据节点的信号强度信息 或者信道情况信息, 选择一个聚合中继节点用来中继该数据节点发往 AP 的 MAC帧。 例如, 可以选择与数据节点之间通信信号强度最大的聚合中继节点来 聚合该数据节点发往 AP的 MAC帧。 本领域技术人员可以理解, 不同的数据节 点选择的聚合中继节点可以相同也可以不同。 即便不同的数据节点选择的聚合 中继节点不同, 但是由于对参与聚合数据的中继节点的个数进行了限制, 由此 可以实现聚合的分组数据可以快速达到发送规模。
根据本发明实施例, AP选定聚合中继节点之后, 可以由聚合中继节点自己 来通知数据节点。 在这种情况下, 聚合中继节点可以向数据节点发送配置消息, 例如广播帧或者多播帧, 该配置消息携带聚合中继节点指示信息, 所述聚合中 继节点指示信息用于指示数据节点将发往 AP并需要聚合的 MAC帧发送至所述 聚合中继节点。
根据本发明实施例, 聚合中继节点也可以是预先设定好的中继节点。 在这 种情况下, 不需要 AP来选择聚合中继节点, 而且聚合中继节点可以向数据节点 发送配置消息, 例如广播帧或者多播帧, 该配置消息携带聚合中继节点指示信 息, 所述聚合中继节点指示信息用于指示数据节点将发往 AP 并需要聚合的 MAC帧发送至所述聚合中继节点。
数据节点选定用于聚合该数据节点发送的 MAC帧的聚合中继节点之后,可 以向该聚合中继节点发送 MAC帧, 并申请聚合中继节点对其数据进行聚合, 进 而发送给目的节点, 在本发明实施例中, 目的节点为 AP。 下面举例说明数据节 点与聚合中继节点之间的通信过程。 现有标准中 MAC帧结构中, 在参数 Frame Control域, Type Subtype的特定比特组合, 例如 10 1101可以用来指示发往聚合 中继节点并申请进行聚合的 MAC帧。 聚合中继节点接收到这种 MAC帧之后, 经过解析, 确定该 MAC帧为申请进行聚合的数据。 根据本发明实施例, 可以将 这种 MAC帧中的目的地址域赋( Address 1 )予该聚合中继节点的地址, 由此可 以省略发送工作站地址域( Address 3 )和接收工作站地址域( Address 4 )。
在分组聚合阶段, 由于上行链路的目的地址均为 AP, 即所有聚合子帧的目 的地址(DA ) 均为 AP地址, 因此可以将所有聚合子帧的 DA域去掉, 只需在 MPDU 头部分(Header ) 的目的地址域 ( Address 1 ) 中放置 AP的地址即可。 由此可以大大减少系统开销。
AP根据接收数据的情况, 向聚合中继节点发送块确认帧进行确认, 或者由 所述聚合中继节点按照需要向 AP发送块确认请求帧, 然后 AP再通过块确认帧 进行确认。
由于块确认请求和块确认均发生在 AP与中继节点之间,因此在块确认请求 和块确认阶段, 通过优化帧结构可以减少不必要的开销。 例如, 在现有标准中 块确认请求帧的结构中, 省略放置 AP地址的相应接收工作站地址域( RA ), 而 发送工作站地址(TA ) 为聚合中继节点的地址。 而在块确认帧结构中, 省略放 置放置 AP地址的相应的发送工作站地址( TA )域, 而将接收工作站地址 ( RA ) 设置为该聚合中继节点的地址。
为了提高分组聚合的效率, 可以按照预设的分组规则将服务区域预先分成 若干个小组, 每个小组中包括多个数据节点和至少一个中继节点。 对于某一小 组中的数据节点, 在该小组中的中继节点中选择一个或者多个中继节点作为聚 合中继节点, 用于聚合该小组中的数据节点发往 AP的上行 MAC帧。
下面举例说明本发明实施例的这种具体应用场景。 例如, 以 AP为中心, 将 服务区域均匀分成 6个角度相等的无缝扇区。 在这种应用场景中, AP可以配备 全向天线和扇形天线, 而其他节点, 包括数据节点和中级节点, 只配备全向天 线。
在网络初始化阶段, AP利用扇形天线, 利用信标依次对各扇区进行轮询。 AP轮询某一扇区时, 信标中包含该扇区的标识符( Sector ID , 简称 SID ), 收到 该信标的数据节点和中继节点获知自己所在的扇区, 然后所有持续供电的中继 节点向 AP发送一个确认帧, AP从这些中继节点中选择与自己有极强通信信号 的一些中继节点作为该扇区的聚合中继节点, 然后再次向该扇区发送配置消息, 例如广播帧, 该广播帧中携带聚合中继节点指示信息, 所述聚合中继节点指示 信息用于指示该扇区中的数据节点将发往 AP并需要聚合的 MAC帧发送至该扇 区组中的聚合中继节点。 AP依次轮询 6个扇区, 完成网络初始化。
在 AP对每个扇区服务阶段, AP使用全向天线向服务区域发送广播帧, 帧 中带有一个帧间隔, 告知所有扇区可以开始服务, 需要被服务的扇区内的聚合 中继节点通过竟争, 在这一帧间隔时间内向 AP发送请求。 AP接收到聚合中继 节点的服务请求之后, 根据预设的规则确定在各扇区内的聚合中继节点的排序 信息, 而后 AP将按该排序信息将扇形天线切换到排序靠前的扇区, 获得服务的 扇区中的聚合中继节点便开始向 AP发送聚合 MAC帧, 所述聚合 MAC帧为该 扇区中的聚合中继节点聚合的该扇区中的数据节点发送的 MAC帧。 AP结束对 某一扇区的服务后, 将扇形天线切换到排序中的下一个扇区, 通知该扇区内的 聚合中继节点向 AP发送聚合 MAC帧。
以上是从接入点的角度描述的本发明实施例的方法。 下面分别从中继节点 和数据节点的角度进一步阐述本发明实施例的方法。
图 2是根据本发明实施例的分组聚合的数据传输方法 200的示意流程图。 如图 2所示, 方法 200包括:
210: 中继节点接收数据节点发送的 MAC帧, 其中所述 MAC帧包括用于 指示对所述 MAC帧进行聚合的聚合指示信息;
220: 中继节点根据所述 MAC帧中的所述聚合指示信息, 将所述 MAC帧 进行聚合, 形成聚合 MAC帧;
230: 中继节点向 AP转发所述聚合 MAC帧。
如上所述, 根据本发明实施例, 在步骤 210之前, 方法 200可以包括步骤: 中继节点接收 AP发送的第一配置消息,其中所述第一配置消息用于指示中继节 点作为聚合中继节点,以聚合数据节点向所述 AP发送并经所述中继节点转发的 MAC帧。
或者, 如上所述, 根据本发明实施例, 在 AP选定作为聚合中继节点的中继 节点, 或者聚合中继节点为预设中继节点的情况下, 在步骤 210之前, 方法 200 可以包括步骤: 聚合中继节点向数据节点发送第二配置消息, 其中所述第二配 置消息携带聚合中继节点指示信息, 所述聚合中继节点指示信息用于指示所述 数据节点将发往所述 AP并需要聚合的 MAC帧发送至所述聚合中继节点。
图 3是根据本发明实施例的分组聚合的数据传输方法 300的示意流程图。 如图 3所示, 方法 300包括:
310: 数据节点确定用于聚合上行 MAC帧的聚合中继节点;
320: 数据节点向所述聚合中继节点发送 MAC帧, 其中所述 MAC帧包括 用于指示对所述 MAC帧进行聚合的聚合指示信息。
如上所述, 根据本发明实施例, 方法 300进一步包括: 数据节点接收点 AP 发送的第一配置消息, 其中所述第一配置消息携带聚合中继节点指示信息, 所 述聚合中继节点指示信息用于指示所述数据节点将发往所述 AP 并需要聚合的 MAC帧发送至所述聚合中继节点。
如上所述, 根据本发明实施例, 在聚合中继节点有多个的情况下, 方法 300 进一步包括:
根据预设的条件, 从所述多个聚合中继节点中选择一个聚合中继节点; 向所选择的所述一个聚合中继节点发送 MAC帧。
如上所述, 根据本发明实施例, 在聚合中继节点通知数据节点的情况下, 方法 300 包括: 数据节点接收聚合中继节点发送的第二配置消息, 其中所述第 二配置消息携带聚合中继节点指示信息, 所述聚合中继节点指示信息用于指示 所述数据节点将发往所述 AP并需要聚合的 MAC帧发送至所述聚合中继节点。
如上所述, 根据本发明实施例, 在聚合中继节点有多个的情况下, 每个第 二配置消息可以携带 RSSI, 由数据节点根据第二配置消息中的 RSSI, 在多个聚 合中继节点中选择一个, 例如选择 RSSI最大的聚合中继节点, 然后向所选择的 聚合中继节点发送 MAC帧。
根据本发明实施例, 有选择地利用中继节点进行数据聚合, 使得聚合的分 组数据快速达到发送规模, 实现了分组数据在较短的时间内发送到目的节点, 从而显著改善了时延敏感型应用业务的服务质量。
同时, 由于仅有中继节点进行数据聚合, 有效保证了其他节点不会因分组 聚合工作而产生能耗。 由于中继节点将聚合后的分组数据发往目的节点, 相当 于参与数据传输的节点数目减少, 有利于緩解隐藏终端问题。
根据本发明实施例, 还提出了用于实现本发明实施例的数据传输方法的接 入点、中继节点和数据节点。这些接入点或者中继节点或数据节点可以是 WLAN 系统中的接入点或者用户站点 STA。
图 4A和 4B是根据本发明实施例的接入点 400的示意结构图, 接入点 400 可以用于实现本发明实施例的方法中的 AP。 如图 4A所示, 接入点 400包括: 处理单元 410, 用于在服务区域内中确定用于聚合数据的聚合中继节点, 用 于聚合数据节点向接入点 AP发送并经所述聚合中继节点转发的 MAC帧;
接收单元 420, 接收所述聚合中继节点发送的聚合 MAC帧, 其中所述聚合 MAC帧为所述聚合中继节点聚合的所述数据节点发送的 MAC帧。
才艮据本发明实施例, 如图 4B所示, 所述处理单元 410预先选定中继节点, 所述接入点 400进一步包括发送单元 430,用于向服务区域内由所述处理单元预 先选定的中继节点发送第一配置消息, 其中所述第一配置消息携带聚合指示信 息, 所述聚合指示信息用于指示所述中继节点用作所述聚合中继节点, 以聚合 数据节点向接入点 AP发送并经所述聚合中继节点转发的 MAC帧。
根据本发明实施例, 所处处理单元 410 用于根据预设的条件确定服务区域 内的全部中继节点中的部分中继节点作为所述聚合中继节点。 根据本发明实施例, 所述发送单元 430还用于向所述数据节点发送第二配 置消息, 其中所述第二配置消息携带聚合中继节点指示信息, 所述聚合中继节 点指示信息用于指示所述数据节点将发往所述 AP并需要聚合的 MAC帧发送至 所述聚合中继节点。
根据本发明实施例, 所述发送单元 430 用于向服务区域内的全部中继节点 发送信标;
所述接收单元 420用于接收所述全部中继节点中的每一个中继节点发送的 针对所述信标的确认帧, 其中所述确认帧携带所述每一个中继节点接收信号的 强度信息;
所述处理单元 410用于根据所述确认帧中所述每一个中继节点接收信号的 强度信息, 选择接收信号的强度最大的一个或者多个中继节点作为所述聚合中 继节点。
根据本发明实施例, 所述处理单元 410还用于按照预设的分组规则将服务 区域分成多个小组, 其中所述多个小组中的每一个小组包括多个中继节点和多 个数据节点;
所述发送单元 430用于向所述多个小组中的具体一个小组中的所述多个中 继节点发送信标;
所述接收单元 420用于接收每一个小组中的所述多个中继节点发送的针对 所述信标的确认帧, 其中所述确认帧携带所述具体一个小组中的所述多个中继 节点接收信号的强度信息;
所述处理单元 410用于根据所述确认帧中所述具体一个小组中的所述多个 中继节点接收信号的强度信息, 选择接收信号的强度最大的一个或者多个中继 节点作为所述具体一个 d、组的聚合中继节点。
根据本发明实施例, 所述发送单元 430 具体用于向所述具体一个小组中的 所述多个数据节点发送所述第二配置消息, 其中所述第二配置消息携带聚合中 继节点指示信息, 所述聚合中继节点指示信息用于指示所述具体一个小组中的 所述多个数据节点将发往所述 AP并需要聚合的 MAC帧发送至所述具体一个小 组中的所述聚合中继节点。
根据本发明实施例, 所述接收单元 420 具体用于接收所述具体一个小组中 的所述聚合中继节点发送的聚合 MAC帧, 其中所述聚合 MAC帧为所述具体一 个小组中的所述聚合中继节点聚合的所述具体一个小组中的所述多个数据节点 发送的 MAC帧。
图 5是才艮据本发明实施例的中继节点 500的示意结构图, 中继节点 500可 以用作实现本发明实施例的方法的聚合中继节点。 如图 5 所示, 中继节点 500 包括:
接收单元 510, 用于接收数据节点发送的媒体接入控制 MAC帧, 其中所述 MAC帧包括用于指示对所述 MAC帧进行聚合的聚合指示信息;
处理单元 520,用于根据所述 MAC帧中的所述聚合指示信息,将所述 MAC 帧进行聚合, 形成聚合 MAC帧;
发送单元 530, 用于向接入点 AP转发所述聚合 MAC帧。
根据本发明实施例, 所述接收单元 510用于接收 AP发送的第一配置消息, 其中所述第一配置消息用于指示中继节点作为聚合中继节点, 以聚合数据节点 向所述 AP发送并经所述中继节点转发的 MAC帧。
根据本发明实施例, 所述发送单元 530 用于向所述数据节点发送第二配置 消息, 其中所述第二配置消息携带聚合中继节点指示信息, 所述聚合中继节点 指示信息用于指示所述数据节点将发往所述 AP并需要聚合的 MAC帧发送至所 述聚合中继节点。
图 6是根据本发明实施例的数据节点 600的示意结构图, 数据节点 600可 以用作实现本发明实施例的方法的数据节点。 如图 6所示, 数据节点 600包括: 处理单元 610, 用于确定用于聚合上行 MAC帧的聚合中继节点;
发送单元 620 , 用于向所述聚合中继节点发送 MAC帧, 其中所述 MAC帧 包括用于指示对所述 MAC帧进行聚合的聚合指示信息。
根据本发明实施例, 所述数据节点 600还包括:
接收单元 630, 用于接收接入点 AP发送的第一配置消息, 其中所述第一配 置消息携带聚合中继节点指示信息, 所述聚合中继节点指示信息用于指示所述 数据节点将发往所述 AP并需要聚合的 MAC帧发送至所述聚合中继节点。
根据本发明实施例, 在所述聚合中继节点包括多个聚合中继节点的情况下, 所述处理单元 610具体用于根据预设的条件, 从所述多个聚合中继节点中选择 一个聚合中继节点, 所述发送单元具体用于向所选择的所述一个聚合中继节点 发送 MAC帧。
根据本发明实施例, 所述接收单元 630 用于接收所述聚合中继节点发送的 第二配置消息, 其中所述第二配置消息携带聚合中继节点指示信息, 所述聚合 中继节点指示信息用于指示所述数据节点将发往所述 AP并需要聚合的 MAC帧 发送至所述聚合中继节点。
根据本发明实施例, 所述接收单元 630 用于接收多个所述聚合中继节点发 送的多个第二配置消息, 其中所述多个第二配置消息分别携带信号强度指示 RSSI,
所述处理单元 610用于根据所述多个第二配置消息中的所述 RSSI, 选择一 个所述聚合中继节点,
所述发送单元 620用于向所选择的所述一个聚合中继节点发送 MAC帧。 本领域普通技术人员可以意识到, 结合本文中所公开的实施例描述的各示 例的单元及算法步骤, 能够以电子硬件、 或者计算机软件和电子硬件的结合来 实现。 这些功能究竟以硬件还是软件方式来执行, 取决于技术方案的特定应用 和设计约束条件。 专业技术人员可以对每个特定的应用来使用不同方法来实现 所描述的功能, 但是这种实现不应认为超出本发明的范围。
所属领域的技术人员可以清楚地了解到, 为描述的方便和简洁, 上述描述 的系统、 装置和单元的具体工作过程, 可以参考前述方法实施例中的对应过程, 在此不再赘述。
在本申请所提供的几个实施例中, 应该理解到, 所揭露的系统、 装置和方 法, 可以通过其它的方式实现。 例如, 以上所描述的装置实施例仅仅是示意性 的, 例如, 所述单元的划分, 仅仅为一种逻辑功能划分, 实际实现时可以有另 外的划分方式, 例如多个单元或组件可以结合或者可以集成到另一个系统, 或 一些特征可以忽略, 或不执行。 另一点, 所显示或讨论的相互之间的耦合或直 接耦合或通信连接可以是通过一些接口, 装置或单元的间接耦合或通信连接, 可以是电性, 机械或其它的形式。 单元显示的部件可以是或者也可以不是物理单元, 即可以位于一个地方, 或者 也可以分布到多个网络单元上。 可以根据实际的需要选择其中的部分或者全部 单元来实现本实施例方案的目的。
另外, 在本发明各个实施例中的各功能单元可以集成在一个处理单元中, 也可以是各个单元单独物理存在, 也可以两个或两个以上单元集成在一个单元 中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用 时, 可以存储在一个计算机可读取存储介质中。 基于这样的理解, 本发明的技 术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以 软件产品的形式体现出来, 该计算机软件产品存储在一个存储介质中, 包括若 干指令用以使得一台计算机设备(可以是个人计算机, 服务器, 或者网络设备 等)执行本发明各个实施例所述方法的全部或部分步骤。 而前述的存储介质包 括: U盘、 移动硬盘、 只读存储器(ROM, Read-Only Memory ), 随机存取存储 器(RAM, Random Access Memory ),磁碟或者光盘等各种可以存储程序代码的 介质。

Claims

权利要求
1. 一种分组聚合的数据传输方法, 其特征在于, 所述方法包括:
在服务区域内中确定聚合中继节点,用于聚合数据节点向接入点 AP发送并 经所述聚合中继节点转发的媒体接入控制 MAC帧;
接收所述聚合中继节点发送的聚合媒体接入控制 MAC 帧, 其中所述聚合 MAC 帧为所述聚合中继节点聚合的所述数据节点发送的媒体接入控制 MAC 帧。
2. 如权利要求 1所述的方法, 其特征在于,
所述在服务区域内确定用于聚合数据的聚合中继节点, 包括:
向服务区域内预先选定的中继节点发送第一配置消息, 其中所述第一配置 消息携带聚合指示信息, 所述聚合指示信息用于指示所述中继节点用作所述聚 合中继节点,以聚合数据节点向接入点 AP发送并经所述聚合中继节点转发的媒 体接入控制 MAC帧。
3. 如权利要求 1所述的方法, 其特征在于,
所述在服务区域内确定用于聚合数据的聚合中继节点, 包括:
根据预设的条件确定服务区域内的全部中继节点中的部分中继节点作为所 述聚合中继节点。
4. 如权利要求 2或 3所述的方法, 其特征在于, 所述方法还包括: 向所述数据节点发送第二配置消息, 其中所述第二配置消息携带聚合中继 节点指示信息, 所述聚合中继节点指示信息用于指示所述数据节点将发往所述 AP并需要聚合的 MAC帧发送至所述聚合中继节点。
5. 如权利要求 2所述的方法, 其特征在于,
在所述向预先选定的聚合中继节点发送第一配置消息之前, 所述方法进一 步包括:
向服务区域内的全部中继节点发送信标;
接收所述全部中继节点中的每一个中继节点发送的针对所述信标的确认 帧, 其中所述确认帧携带所述每一个中继节点接收信号的强度信息;
根据所述确认帧中所述每一个中继节点接收信号的强度信息, 选择接收信 号的强度最大的一个或者多个中继节点作为所述聚合中继节点。
6. 如权利要求 1所述的方法, 其特征在于,
在所述向预先选定的聚合中继节点发送第一配置消息之前, 所述方法进一 步包括:
按照预设的分组规则将服务区域分成多个小组, 其中所述多个小组中的每 一个小组包括至少一个中继节点和至少一个数据节点;
向所述多个小组中的具体一个小组中的所述至少一个中继节点发送信标; 接收每一个小组中的所述至少一个中继节点发送的针对所述信标的确认 帧, 其中所述确认帧携带所述具体一个小组中的所述至少一个中继节点接收信 号的强度信息;
根据所述确认帧中所述具体一个小组中的所述至少一个中继节点接收信号 的强度信息, 选择接收信号的强度最大的一个或者多个中继节点作为所述具体 一个小组的聚合中继节点。
7. 如权利要求 6所述的方法, 其特征在于,
所述向所述数据节点发送第二配置消息, 其中所述第二配置消息携带聚合 中继节点指示信息, 所述聚合中继节点指示信息用于指示所述数据节点将发往 所述 AP并需要聚合的 MAC帧发送至所述聚合中继节点, 包括:
向所述具体一个小组中的所述至少一个数据节点发送所述第二配置消息, 其中所述第二配置消息携带聚合中继节点指示信息, 所述聚合中继节点指示信 息用于指示所述具体一个小组中的所述至少一个数据节点将发往所述 AP 并需 要聚合的 MAC帧发送至所述具体一个小组中的所述聚合中继节点。
8. 如权利要求 7所述的方法, 其特征在于,
所述接收所述聚合中继节点发送的聚合 MAC帧, 其中所述聚合 MAC帧为 所述聚合中继节点聚合的所述数据节点发送的 MAC帧, 包括:
接收所述具体一个小组中的所述聚合中继节点发送的聚合 MAC帧,其中所 述聚合 MAC 帧为所述具体一个小组中的所述聚合中继节点聚合的所述具体一 个小组中的所述至少一个数据节点发送的 MAC帧。
9. 一种分组聚合的传输方法, 其特征在于, 所述方法包括:
接收数据节点发送的媒体接入控制 MAC帧, 其中所述 MAC帧包括用于指 示对所述 MAC帧进行聚合的聚合指示信息;
根据所述 MAC帧中的所述聚合指示信息, 将所述 MAC帧进行聚合, 形成 聚合 MAC帧;
向接入点 AP转发所述聚合 MAC帧。
10. 如权利要求 9所述的传输方法, 其特征在于, 在所述接收数据节点发送的媒体接入控制 MAC帧之前,所述方法进一步包 括:
接收接入点 AP发送的第一配置消息,其中所述第一配置消息用于指示中继 节点作为聚合中继节点,以聚合数据节点向所述 AP发送并经所述中继节点转发 的 MAC帧。
11. 如权利要求 9或 10所述的传输方法, 其特征在于,
在所述接收数据节点发送的媒体接入控制 MAC帧之前,所述方法进一步包 括:
向所述数据节点发送第二配置消息, 其中所述第二配置消息携带中继节点 指示信息,所述中继节点指示信息用于指示所述数据节点将发往所述 AP并需要 聚合的 MAC帧发送至所述中继节点。
12. 一种分组聚合的数据传输方法, 其特征在于, 所述方法包括: 确定用于聚合上行 MAC帧的聚合中继节点;
向所述聚合中继节点发送 MAC帧, 其中所述 MAC帧包括用于指示对所述 MAC帧进行聚合的聚合指示信息。
13. 如权利要求 12所述的方法, 其特征在于,
所述确定用于聚合上行 MAC帧的聚合中继节点, 包括:
接收接入点 AP发送的第一配置消息,其中所述第一配置消息携带聚合中继 节点指示信息, 所述聚合中继节点指示信息用于指示所述数据节点将发往所述 AP并需要聚合的 MAC帧发送至所述聚合中继节点。
14. 如权利要求 12所述的方法, 其特征在于,
所述聚合中继节点包括多个聚合中继节点;
所述方法进一步包括:
根据预设的条件, 从所述多个聚合中继节点中选择一个聚合中继节点; 所述向所述聚合中继节点发送 MAC帧, 具体为:
向所选择的所述一个聚合中继节点发送 MAC帧。
15. 如权利要求 12所述的方法, 其特征在于,
所述确定用于聚合上行 MAC帧的聚合中继节点, 包括:
接收所述聚合中继节点发送的第二配置消息, 其中所述第二配置消息携带 聚合中继节点指示信息, 所述聚合中继节点指示信息用于指示所述数据节点将 发往所述 AP并需要聚合的 MAC帧发送至所述聚合中继节点。
16. 如权利要求 15所述的方法, 其特征在于,
所述接收所述聚合中继节点发送的第二配置消息, 包括:
接收多个所述聚合中继节点发送的多个第二配置消息, 其中所述多个第二 配置消息分别携带信号强度指示 RSSI;
所述方法进一步包括:
根据所述多个第二配置消息中的所述 RSSI, 选择一个所述聚合中继节点; 所述向所述聚合中继节点发送 MAC帧, 包括:
向所选择的所述一个聚合中继节点发送 MAC帧。
17. 一种接入点, 其特征在于, 所述接入点包括:
处理单元, 用于在服务区域内中确定聚合中继节点, 用于聚合数据节点向 接入点 AP发送并经所述聚合中继节点转发的 MAC帧;
接收单元,接收所述聚合中继节点发送的聚合 MAC帧,其中所述聚合 MAC 帧为所述聚合中继节点聚合的所述数据节点发送的 MAC帧。
18. 如权利要求 17所述的接入点, 其特征在于,
所述处理单元用于在服务区域内中预先选定中继节点,
所述接入点进一步包括发送单元, 用于向服务区域内由所述处理单元预先 选定的中继节点发送第一配置消息, 其中所述第一配置消息携带聚合指示信息, 所述聚合指示信息用于指示所述中继节点用作所述聚合中继节点, 以聚合数据 节点向接入点 AP发送并经所述聚合中继节点转发的 MAC帧。
19. 如权利要求 17所述的接入点, 其特征在于, 分中继节点作为所述聚合中继节点。
20. 如权利要求 18或 19所述的接入点, 其特征在于,
所述发送单元还用于向所述数据节点发送第二配置消息, 其中所述第二配 置消息携带聚合中继节点指示信息, 所述聚合中继节点指示信息用于指示所述 数据节点将发往所述 AP并需要聚合的 MAC帧发送至所述聚合中继节点。
21. 如权利要求 18所述的接入点, 其特征在于,
所述发送单元用于向服务区域内的全部中继节点发送信标;
所述接收单元用于接收所述全部中继节点中的每一个中继节点发送的针对 所述信标的确认帧, 其中所述确认帧携带所述每一个中继节点接收信号的强度 信息; 所述处理单元用于根据所述确认帧中所述每一个中继节点接收信号的强度 信息, 选择接收信号的强度最大的一个或者多个中继节点作为所述聚合中继节 点。
22. 如权利要求 17所述的接入点, 其特征在于, 所述多个小组中的每一个小组包括多个中继节点和多个数据节点;
所述发送单元用于向所述多个小组中的具体一个小组中的所述多个中继节 点发送信标;
所述接收单元用于接收每一个小组中的所述多个中继节点发送的针对所述 信标的确认帧, 其中所述确认帧携带所述具体一个小组中的所述多个中继节点 接收信号的强度信息; 节点接收信号的强度信息, 选择接收信号的强度最大的一个或者多个中继节点 作为所述具体一个 d、组的聚合中继节点。
23. 如权利要求 22所述的接入点, 其特征在于,
所述发送单元具体用于向所述具体一个小组中的所述多个数据节点发送所 述第二配置消息, 其中所述第二配置消息携带聚合中继节点指示信息, 所述聚 合中继节点指示信息用于指示所述具体一个小组中的所述多个数据节点将发往 所述接入点并需要聚合的 MAC 帧发送至所述具体一个小组中的所述聚合中继 节点。
24. 如权利要求 23所述的接入点, 其特征在于,
所述接收单元具体用于接收所述具体一个小组中的所述聚合中继节点发送 的聚合 MAC帧, 其中所述聚合 MAC帧为所述具体一个小组中的所述聚合中继 节点聚合的所述具体一个小组中的所述多个数据节点发送的 MAC帧。
25. 一种中继节点, 其特征在于, 所述中继节点包括:
接收单元,用于接收数据节点发送的媒体接入控制 MAC帧,其中所述 MAC 帧包括用于指示对所述 MAC帧进行聚合的聚合指示信息;
处理单元, 用于根据所述 MAC帧中的所述聚合指示信息, 将所述 MAC帧 进行聚合, 形成聚合 MAC帧;
发送单元, 用于向接入点 AP转发所述聚合 MAC帧。
26. 如权利要求 25所述的中继节点, 其特征在于, 所述接收单元用于接收接入点 AP发送的第一配置消息,其中所述第一配置 消息用于指示所述中继节点作为聚合中继节点,以聚合数据节点向所述 AP发送 并经所述中继节点转发的 MAC帧。
27. 如权利要求 25或 26所述的中继节点, 其特征在于,
所述发送单元用于向所述数据节点发送第二配置消息, 其中所述第二配置 消息携带聚合中继节点指示信息, 所述聚合中继节点指示信息用于指示所述数 据节点将发往所述 AP并需要聚合的 MAC帧发送至所述中继节点。
28. 一种数据节点, 其特征在于, 所述数据节点包括:
处理单元, 用于确定用于聚合 MAC帧的聚合中继节点;
发送单元, 用于向所述聚合中继节点发送 MAC帧, 其中所述 MAC帧包括 用于指示对所述 MAC帧进行聚合的聚合指示信息。
29. 如权利要求 28所述的数据节点, 其特征在于,
所述数据节点还包括:
接收单元, 用于接收接入点 AP发送的第一配置消息, 其中所述第一配置消 息携带聚合中继节点指示信息, 所述聚合中继节点指示信息用于指示所述数据 节点将发往所述 AP并需要聚合的 MAC帧发送至所述聚合中继节点。
30. 如权利要求 28所述的数据节点, 其特征在于,
所述聚合中继节点包括多个聚合中继节点;
所述处理单元具体用于根据预设的条件, 从所述多个聚合中继节点中选择 一个聚合中继节点, 所述发送单元具体用于向所选择的所述一个聚合中继节点 发送 MAC帧。
31. 如权利要求 30所述的数据节点, 其特征在于,
所述接收单元用于接收所述聚合中继节点发送的第二配置消息, 其中所述 第二配置消息携带聚合中继节点指示信息, 所述聚合中继节点指示信息用于指 示所述数据节点将发往所述 AP并需要聚合的 MAC 帧发送至所述聚合中继节 点。
32. 如权利要求 31所述的数据节点, 其特征在于,
所述接收单元用于接收多个所述聚合中继节点发送的多个第二配置消息, 其中所述多个第二配置消息分别携带信号强度指示 RSSI,
所述处理单元用于根据所述多个第二配置消息中的所述 RSSI, 选择一个所 述聚合中继节点, 所述发送单元用于向所选择的所述一个聚合中继节点发送 MAC帧。
PCT/CN2013/071812 2012-02-24 2013-02-25 分组聚合的数据传输方法、接入点、中继节点和数据节点 WO2013123901A1 (zh)

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