WO2014043853A1 - 无线局域网中的转发方法和装置 - Google Patents
无线局域网中的转发方法和装置 Download PDFInfo
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- WO2014043853A1 WO2014043853A1 PCT/CN2012/081551 CN2012081551W WO2014043853A1 WO 2014043853 A1 WO2014043853 A1 WO 2014043853A1 CN 2012081551 W CN2012081551 W CN 2012081551W WO 2014043853 A1 WO2014043853 A1 WO 2014043853A1
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- WIPO (PCT)
- Prior art keywords
- forwarding mode
- wtp
- capwap
- local
- data tunnel
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 59
- 238000012545 processing Methods 0.000 claims description 26
- 238000010586 diagram Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/12—Setup of transport tunnels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/25—Maintenance of established connections
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
Definitions
- the present invention relates to the field of communications, and in particular, to a forwarding method and apparatus in a wireless local area network. Background technique
- CAPWAP Control and Provisioning of Wireless Access Points
- AC Access Controller
- WTP Wireless Termination Point
- the CAPWAP control tunnel and the CAPWAP data tunnel are created separately.
- the CAPWAP data tunnel is not used, but additional maintenance of the state of the CAPWAP data tunnel is required.
- the CAPWAP data tunnel is interrupted, the CAPWAP control tunnel will be interrupted, and the WTP service will not work properly.
- the present invention provides a method and a device for forwarding in a WLAN, which can be protected from the interruption of the CAPWAP data tunnel in the local forwarding scenario, and ensure the normal operation of the WTP service.
- a forwarding method in a wireless local area network comprising:
- the WTP determines a forwarding mode, where the forwarding mode includes: a tunnel forwarding mode and a first local forwarding mode;
- the WTP does not establish a CAPWAP data tunnel in the first local forwarding mode
- the WTP closes the C AP WAP data tunnel when the CAPWAP data tunnel is established.
- a forwarding method in a wireless local area network comprising:
- the AC determines a forwarding mode of the WTP, where the forwarding mode includes: a tunnel forwarding mode and a first local forwarding mode;
- the AC does not establish a CAPWAP data tunnel when determining that the WTP works in the first local forwarding mode
- the AC determines that the WTP works in the first local forwarding mode, and closes the keepalive message processing process when the CAPWAP data tunnel is established.
- a WTP device comprising:
- a determining unit configured to determine a forwarding mode, where the forwarding mode includes a tunnel forwarding mode and a first local forwarding mode;
- a processing unit configured to: when the determining unit determines to work in the first local forwarding mode, does not establish a CAPWAP data tunnel; or
- an AC device includes: a determining unit, configured to determine a forwarding mode of the WTP, where the forwarding mode includes: a tunnel forwarding mode and a first local forwarding mode;
- a processing unit configured to: when the determining unit determines that the WTP works in the first local forwarding mode, does not establish a CAPWAP data tunnel; or
- the forwarding method, the AC device, and the WTP device in the WLAN provided by the present invention can be free from being localized by not establishing a CAPWAP data tunnel or closing a CAPWAP data tunnel when operating in the first local forwarding mode. Forward The impact of the CAPWAP data tunnel interruption in the scenario ensures the normal operation of the WTP service.
- FIG. 1 is a flowchart of a forwarding method in a wireless local area network according to an embodiment of the present invention
- FIG. 1B is a flowchart of another forwarding method in a wireless local area network according to an embodiment of the present invention.
- FIG. 2 is a schematic structural diagram of a WTP device according to an embodiment of the present invention
- FIG. 3B is a block diagram of another structure of a WTP device according to an embodiment of the present invention
- 4A is a structural block diagram of an AC device according to an embodiment of the present invention
- FIG. 1 is a flow chart of a forwarding method in a wireless local area network according to an embodiment of the present invention.
- an embodiment of the present invention provides a forwarding method in a wireless local area network, where the method is described based on WTP, and includes:
- the WTP determines a forwarding mode, where the forwarding mode includes: a tunnel forwarding mode and The first local forwarding mode.
- a method for determining the forwarding mode by the WTP may be: The WTP receives the CAPWAP packet sent by the AC, and the CAPWAP packet includes the forwarding mode indication information.
- the CAPWAP packet may also include necessary configuration information, for example, The configuration information of the first local forwarding mode; the WTP determines the forwarding mode according to the forwarding mode indication information in the CAPWAP packet.
- the CAPWAP message carrying the forwarding mode indication information may be an IEEE (Institute of Electrical and Electronics Engineers) 802.1 1 WLAN (Wireless Local Area Network) configuration request ( A Configuration Request message, and the forwarding mode indication information may be indicated by a Tunnel Mode element in the IEEE 802.1 1 1 WL AN Configuration Request message.
- IEEE Institute of Electrical and Electronics Engineers
- 802.1 1 WLAN Wireless Local Area Network
- the forwarding mode indication information may be indicated by a Tunnel Mode element in the IEEE 802.1 1 1 WL AN Configuration Request message.
- the present invention does not specifically limit the CAPWAP message, as long as the purpose of indicating the forwarding mode can be achieved.
- WTP can forward data directly to the AC without passing through the CAPWAP data tunnel established between it and the AC. Moreover, in the first local forwarding mode, only the CAPWAP control tunnel is maintained between the WTP and the AC, and the CAPWAP data tunnel is not maintained.
- the forwarding mode may further include a second local forwarding mode to ensure compatibility.
- WTP can forward data directly to the AC without passing through the CAPWAP data tunnel established between it and the AC.
- the CAPWAP control tunnel and the CAPWAP data tunnel are maintained between the WTP and the AC in the second local forwarding mode, and the CAPWAP data tunnel is not eliminated.
- the WTP After the WTP obtains the forwarding mode indication information, if the forwarding mode indication information indicates the first local forwarding mode, the WTP determines whether it supports (or is compatible with) the mode, and if so, works directly in the first local forwarding mode; otherwise, Works in the second local forwarding mode. Certainly, if the forwarding mode indication information indicates the second local forwarding mode or the tunnel forwarding mode, the WTP works directly in the second local forwarding mode or the tunnel forwarding mode. Style.
- the WTP does not establish a CAPWAP data tunnel in the first local forwarding mode; or, in the first local forwarding mode, the WTP closes the CAPWAP data tunnel when the CAPWAP data tunnel is established.
- the WTP establishes a CAPWAP data tunnel with the AC when operating in the second local forwarding mode. For example, when the WTP is switched from the first local forwarding mode to the second local forwarding mode, the WTP re-establishes a CAPWAP data tunnel with the AC.
- the CAPWAP data tunnel when the WTP works in the first local forwarding mode, the CAPWAP data tunnel is not established, and when the CAPWAP data tunnel is established, the CAPWAP data tunnel is closed.
- the CAPWAP data tunnel is not established, for example, when the WTP is initially powered on, that is, the first local forwarding mode is configured. Closing the established CAPWAP data tunnel can be applied, for example, to the case where WTP was previously configured for the second local forwarding mode, the CAPWAP control tunnel and the CAPWAP data tunnel have been established, and then switched to the first local forwarding mode.
- the CAPWAP data tunnel can be closed to specifically close the port (socket) corresponding to the UDP. After the WTP closes the established CAPWAP data tunnel, the WTP can send an acknowledgement to the AC to close the established CAPWAP data tunnel.
- UDP User Datagram Protocol
- the CAPWAP control tunnel can maintain the status by responding (Echo) messages.
- the CAPWAP data tunnel can maintain a state through Keep Alive.
- the CAPWAP data tunnel does not send a keep-alive message to the AC to the AC. Accordingly, after the AC knows that the WTP closes the established CAPWAP data tunnel, the AC shuts down the WTP.
- the keep-alive 4 ⁇ process handles that the WTP is working properly.
- the forwarding method in the WLAN provided by the embodiment of the present invention, when the WTP works in the first local forwarding mode, can not be CAPWAP data tunnel in the local forwarding scenario by not establishing a CAPWAP data tunnel or closing the CAPWAP data tunnel.
- the impact of the channel interruption ensures the normal operation of the WTP service.
- FIG. 1B is a flow chart of a forwarding method in a wireless local area network according to an embodiment of the present invention.
- an embodiment of the present invention provides a forwarding method in a wireless local area network, where the method is described based on an AC, and includes:
- the AC determines a forwarding mode of the WTP, where the forwarding mode includes: a tunnel forwarding mode and a first local forwarding mode.
- the AC may send the CAP WAP message to the WTP, where the CAPWAP message includes the forwarding mode indication information, and the CAPWAP message may further include the necessary configuration information.
- the configuration information of the first local forwarding mode For example, the configuration information of the first local forwarding mode.
- the WTP may determine the forwarding mode according to the forwarding mode indication information in the CAPWAP packet. After determining its own forwarding mode, WTP interacts with the AC so that the AC can determine the WTP forwarding mode based on the WTP response.
- the AC does not establish a CAPWAP data tunnel when determining that the WTP works in the first local forwarding mode; or the AC determines that the WTP works in the first local forwarding mode, and the CAPWAP data tunnel is established.
- the keepalive message processing is closed.
- the AC establishes a CAPWAP data tunnel with the WTP when determining that the WTP works in the second local forwarding mode. For example, when the WTP is switched from the first local forwarding mode to the second local forwarding mode, the AC re-establishes a CAPWAP data tunnel with the WTP.
- the AC can establish only a CAPWAP control tunnel with the WTP without establishing a CAPWAP data tunnel.
- This method can be applied, for example, to the case where the WTP is first powered on, that is, the first local forwarding mode.
- the AC can close the keepalive packet processing process when the CAPWAP data tunnel is established. This manner is applicable, for example, to the case where the WTP was previously instructed to operate in the second local forwarding mode, the CAPWAP control tunnel and the CAPWAP data tunnel have been established, and then the handover to the first local forwarding mode is indicated.
- WTP is no longer in the CAPWAP data tunnel when working in the first local forwarding mode Sending a keep-alive message to the AC.
- the AC closes the keep-alive packet processing process for the WTP to ensure that the WTP works normally.
- the AC only maintains the state of the CAPWAP control tunnel based on the echo (CAP) message of the CAPWAP control tunnel.
- the AC does not receive the echo (Echo) packet sent by the WTP within a certain interval, the CAPWAP control tunnel and the CAPWAP data tunnel are reset to re-establish the CAPWAP control tunnel and the CAPWAP data tunnel with the WTP.
- the AC considers the CAPWAP tunnel to be in a normal state.
- the embodiment provides a forwarding method in a wireless local area network, where the method may include:
- the WTP After the WTP is powered on, it receives the CAPWAP packet sent by the AC.
- the CAPWAP packet indicates that the WTP works in the first local forwarding mode.
- the WTP determines that it supports the first local forwarding mode and operates in the first local forwarding mode.
- the WTP sends an Echo Request message to the AC.
- the AC After receiving the response request message, the AC sends an echo response (Echo Response) to the WTP.
- Echo Response Echo Response
- WTP works in the first local forwarding mode after power-on, and only establishes a CAPWAP control tunnel without establishing a CAPWAP data tunnel. It is not affected by the interruption of the CAPWAP data tunnel in the local forwarding scenario to ensure the normal operation of the WTP service.
- the WTP After the WTP is in the first local forwarding mode for a period of time, if the AC indicates that the AC is in the tunnel forwarding mode, the WTP establishes a CAPWAP data tunnel with the AC. In the process, the WTP transmits data to the AC through the CAPWAP data tunnel, and sends a keep-alive message to the AC to maintain the CAPWAP data tunnel.
- the WTP After the WTP is in the tunnel forwarding mode, if the AC receives the packet indicating that the operation is in the first local forwarding mode, the WTP is switched back to the first local forwarding mode. Since the CAPWAP data tunnel has been established in the previous tunnel forwarding mode, when the WTP is in the first local forwarding mode, the CAPWAP data tunnel can be eliminated by closing the CAPWAP data tunnel.
- the CAPWAP protocol is based on the UDP protocol.
- the CAPWAP data tunnel can be closed to close the UDP port. After the TPWAP data tunnel is closed, the WTP can send an acknowledgment message to the AC to close the CAPWAP data tunnel.
- the WTP does not send the keep-alive message to the AC in the CAPWAP data tunnel when the WTP is working in the first local forwarding mode. Accordingly, after receiving the confirmation message that the CAPWAP data tunnel is closed, the AC closes the WTP for the WTP.
- the keep-alive processing process ensures that the WTP works properly.
- the AC maintains the state of the CAPWAP tunnel only based on the echo (CAP) message of the CAPWAP control tunnel.
- the CAPWAP tunnel is reset to re-establish the CAPWAP control tunnel and the CAPWAP data tunnel with the WTP. In other cases, the AC considers the CAPWAP tunnel to be in a normal state.
- an embodiment of the present invention further provides a WTP device 30, which may include a determining unit 31 and a processing unit 32. among them:
- the determining unit 3 1 is configured to determine a forwarding mode, where the forwarding mode includes: a tunnel forwarding mode and a first local forwarding mode;
- the processing unit 32 is configured to not establish a CAPWAP data tunnel when the determining unit 31 determines to operate in the first local forwarding mode, or to determine that the determining unit 3 1 operates in the first local forwarding mode, and When the CAPWAP data tunnel is established, the CAPWAP data tunnel is closed.
- the forwarding mode further includes a second local forwarding mode, where the processing unit 32 is further configured to:
- a CAPWAP data tunnel is established with the AC.
- the WTP device provided by the embodiment of the present invention can ensure the WTP service without being affected by the interruption of the CAPWAP data tunnel in the local forwarding scenario by not establishing the CAPWAP data tunnel or closing the CAPWAP data tunnel when working in the first local forwarding mode. The normal progress.
- the processing unit 32 is further configured to: establish a CAPWAP control tunnel between the WTP and the AC;
- the processing unit 32 is further configured to: establish a CAPWAP control tunnel and a CAPWAP data tunnel respectively between the WTP and the AC;
- the CAPWAP data tunnel is closed.
- the CAPWAP control tunnel maintains a state by responding to the message.
- the WTP device may further include a receiving unit 33, and the towel:
- the receiving unit 33 is configured to receive a CAPWAP message sent by the AC, where the CAPWAP message includes forwarding mode indication information;
- the determining unit 31 is used to: Determining a forwarding mode according to forwarding mode indication information in the CAPWAP message.
- the WTP device provided by the embodiment of the present invention corresponds to the forwarding method in the wireless local area network based on the WTP description. Since the method has been described in detail in the foregoing, the corresponding content may refer to the description content. This will not be repeated here.
- the forwarding method in the WLAN provided by the embodiment of the present invention as shown in the figure
- an embodiment of the present invention further provides an AC device 40.
- the AC device 40 may include a determining unit 41 and a processing unit 42, where:
- the determining unit 41 is configured to determine a forwarding mode of the WTP, where the forwarding mode includes: a tunnel forwarding mode and a first local forwarding mode;
- the processing unit 42 is configured to: when the determining unit determines that the WTP works in the first local forwarding mode, does not establish a CAPWAP data tunnel; or is configured to determine, in the determining unit, that the WTP works in a first local forwarding mode And when the CAPWAP data tunnel is established, the keepalive message processing process is closed.
- the forwarding mode further includes a second local forwarding mode.
- the processing unit 42 is also used to:
- a CAPWAP data tunnel is established with the WTP.
- the AC device provided by the embodiment of the present invention can ensure the WTP service without being affected by the interruption of the CAPWAP data tunnel in the local forwarding scenario by not establishing the CAPWAP data tunnel or closing the CAPWAP data tunnel when working in the first local forwarding mode. The normal progress.
- the processing unit 42 is further configured to: establish a CAPWAP control tunnel between the AC device and the WTP; and determine, by the determining unit 41, that the WTP works In the first local forwarding mode, no CAPWAP data tunnel is established.
- the processing unit 42 is further configured to: establish a CAPWAP control tunnel between the AC device and the WTP, respectively. And CAP WAP data tunnel;
- the keepalive message processing process is closed.
- the AC device may further include a transmitting unit 43. Its towel:
- the sending unit 43 is configured to send a CAPWAP message to the WTP, where the CAPWAP message includes forwarding mode indication information, so that the WTP determines the forwarding mode according to the forwarding mode indication information in the CAPWAP message.
- the AC device provided by the embodiment of the present invention corresponds to the forwarding method in the wireless local area network described above based on AC. Since the method has been described in detail in the foregoing, the corresponding content may refer to the description content. This will not be repeated here.
- each unit included is only divided according to functional logic, but is not limited to the above division, as long as the corresponding function can be implemented;
- the names are also for convenience of distinction from each other and are not intended to limit the scope of protection of the present invention.
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Abstract
本发明提供一种无线局域网中的转发方法,能够不受在本地转发场景下的CAPWAP数据隧道中断的影响,保证WTP业务的正常进行。所述方法包括:WTP确定转发模式,所述转发模式包括:隧道转发模式和第一本地转发模式;所述WTP在第一本地转发模式下,不建立CAPWAP数据隧道;或者,所述WTP在第一本地转发模式下,在已建立CAPWAP数据隧道时,关闭CAPWAP数据隧道。本发明还提供另一种无线局域网中的转发方法和相应的装置。
Description
无线局域网中的转发方法和装置 技术领域
本发明涉及通信领域, 尤其涉及一种无线局域网中的转发方法 和装置。 背景技术
CAPWAP (Control And Provisioning of Wireless Access Points , 无线接入点的控制和配置)是一种用于 AC(Access Controller ,接入控 制器)管理 WTP(Wireless Termination Point , 无线终端点)的标准协 议, 在该标准协议中要求配置 WTP 的消息都需要通过 CAPWAP控 制隧道封装。
然而, 在本地转发场景下, CAPWAP控制隧道和 CAPWAP数据 隧道分别会被创建, 而在用户数据传输的过程中, CAPWAP数据隧 道不会被使用, 但却需要额外的维护 CAPWAP数据隧道的状态。 此 时, 如果 CAPWAP数据隧道中断, 也会导致 CAPWAP控制隧道中 断, 进而导致 WTP业务无法正常进行。 发明内容
本发明提供一种无线局域网中的转发方法和装置, 能够不受在 本地转发场景下的 CAPWAP数据隧道中断的影响, 保证 WTP 业务 的正常进行。
为达到上述目 的, 采用如下技术方案:
根据本发明的一方面, 提供一种无线局域网中的转发方法, 所 述方法包括:
WTP确定转发模式, 所述转发模式包括: 隧道转发模式和第一 本地转发模式;
所述 WTP在第一本地转发模式下, 不建立 CAPWAP数据隧道;
或者,
所述 WTP在第一本地转发模式下, 在已建立 CAPWAP数据隧 道时, 关闭 C AP WAP数据隧道
根据本发明的另一方面, 提供一种无线局域网中的转发方法, 所述方法包括:
AC确定 WTP 的转发模式, 所述转发模式包括: 隧道转发模式 和第一本地转发模式;
所述 AC在确定所述 WTP工作于第一本地转发模式时, 不建立 CAPWAP数据隧道; 或者
所述 AC在确定所述 WTP工作于第一本地转发模式, 且在已建 立 CAPWAP数据隧道时, 关闭保活报文处理过程。
根据本发明的另一方面, 提供一种 WTP装置, 所述 WTP装置 包括:
确定单元, 用于确定转发模式, 所述转发模式包括隧道转发模 式和第一本地转发模式;
处理单元, 处理单元, 用于在所述确定单元确定工作于第一本 地转发模式下时, 不建立 CAPWAP数据隧道; 或者,
用于在所述确定单元确定工作于第一本地转发模式下, 且在已 建立 CAPWAP数据隧道时, 关闭 CAPWAP数据隧道。
根据本发明的另一方面, 提供 AC装置, 所述 AC装置包括: 确定单元, 用于确定 WTP的转发模式, 所述转发模式包括: 隧 道转发模式和第一本地转发模式;
处理单元, 用于在所述确定单元确定所述 WTP工作于第一本地 转发模式时, 不建立 CAPWAP数据隧道; 或者
用于在所述确定单元确定所述 WTP工作于第一本地转发模式, 且在已建立 CAPWAP数据隧道时, 关闭保活报文处理过程。
采用上述技术方案后, 本发明提供的无线局域网中的转发方法、 AC装置和 WTP装置, 在工作于第一本地转发模式时, 通过不建立 CAPWAP数据隧道或关闭 CAPWAP数据隧道, 能够不受在本地转发
场景下的 CAPWAP数据隧道中断的影响, 保证 WTP 业务的正常进 行。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案, 下 面将对实施例或现有技术描述中所需要使用的附图作简单地介绍, 显而易见地, 下面描述中的附图仅仅是本发明的一些实施例, 对于 本领域普通技术人员来讲, 在不付出创造性劳动的前提下, 还可以 根据这些附图获得其他的附图。
图 1 A 为本发明实施例提供的一种无线局域网中的转发方法的 流程图;
图 1 B 为本发明实施例提供的另一种无线局域网中的转发方法 的流程图;
图 2为本发明实施例提供的 WTP与 AC交互的示意图; 图 3A为本发明实施例提供的 WTP装置的一结构框图; 图 3B为本发明实施例提供的 WTP装置的另一结构框图; 图 4A为本发明实施例提供的 AC装置的一结构框图;
图 4B为本发明实施例提供的 AC装置的另一结构框图。 具体实施方式
下面将结合本发明实施例中的附图, 对本发明实施例的技术方 案进行清楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明的 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做出创造性劳动的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。
图 1 A 是本发明实施例提供的无线局域网中的转发方法的流程 图。 参照图 1 A , 本发明实施例提供一种无线局域网中的转发方法, 所述方法基于 WTP而描述, 包括:
1 1、 WTP确定转发模式, 所述转发模式包括: 隧道转发模式和
第一本地转发模式。
WTP 确定转发模式的一种方式可以为: WTP 接收 AC 发送的 CAPWAP报文, 所述 CAPWAP报文中包含有转发模式指示信息, 当 然, 所述 CAPWAP报文中还可包含必要的配置信息, 例如第一本地 转发模式的配置信息; WTP根据所述 CAPWAP报文中的转发模式指 示信息来确定转发模式。
在本发明实施例中, 携带转发模式指示信息的 CAPWAP报文可 以是 IEEE(Institute of Electrical and Electronics Engineers , 电气和电 子工程师协会) 802. 1 1 WLAN(Wireless Local Area Network, 无线局 域网) 配置请求(Configuration Request)报文, 且转发模式指示信息 可由 IEEE 802. 1 1 WL AN 配置请求报文中的隧道模式(Tunnel Mode) 元素指示。 当然, 本发明并不对 CAPWAP报文进行具体限定, 只要 能实现指示转发模式的目 的即可。
其中, 在隧道转发模式下, WTP 的所有数据会经由其与 AC之 间建立的 CAPWAP数据隧道而传送至 AC。
在第一本地转发模式下, WTP 可直接将数据转发给 AC , 而不 经过其与 AC之间建立的 CAPWAP数据隧道。 而且, 在第一本地转 发模式下, 所述 WTP 与所述 AC之间仅维持 CAPWAP控制隧道 , 不维持 CAPWAP数据隧道。
可选地, 所述转发模式还可包括第二本地转发模式, 以保证兼 容性。 在第二本地转发模式下, WTP 可直接将数据转发给 AC , 而 不经过其与 AC之间建立的 CAPWAP数据隧道。 其中, 在第二本地 转发模式下, 所述 WTP 与所述 AC之间同时维持 CAPWAP控制隧 道和 CAPWAP数据隧道, 且不消除所述 CAPWAP数据隧道。
WTP在获取转发模式指示信息后, 若转发模式指示信息指示为 第一本地转发模式, 则 WTP确定自身是否支持 (或兼容) 此模式, 若支持, 则直接工作于第一本地转发模式; 否则, 工作于第二本地 转发模式。 当然, 若转发模式指示信息指示为第二本地转发模式或 隧道转发模式, 则 WTP直接工作于第二本地转发模式或隧道转发模
式。
12、 所述 WTP在第一本地转发模式下, 不建立 CAPWAP数据 隧道; 或者, 所述 WTP在第一本地转发模式下, 在已建立 CAPWAP 数据隧道时, 关闭 CAPWAP数据隧道。
所述 WTP 在工作于第二本地转发模式下时, 与所述 AC 建立 CAPWAP数据隧道。 例如, 所述 WTP在从第一本地转发模式切换到 第二本地转发模式时, 所述 WTP 与所述 AC重新建立 CAPWAP数 据隧道。
在本发明实施例中, WTP在工作于第一本地转发模式时, 不建 立 CAPWAP数据隧道, 而在已经建立 CAPWAP数据隧道时, 关闭 CAPWAP数据隧道。 其中, 不建立 CAPWAP数据隧道例如可适用于 WTP初次上电即被配置为第一本地转发模式的情况。 关闭已建立的 CAPWAP 数据隧道例如可适用于 WTP 先前被配置为第二本地转发 模式, 已建好 CAPWAP控制隧道和 CAPWAP数据隧道, 而后切换 到第一本地转发模式的情况。 由于 CAPWAP 协议基于 UDP(User Datagram Protocol , 用户数据报协议)协议, 关闭 CAPWAP数据隧道 可具体为关闭该 UDP 对应的端口(socket)。 WTP 在关闭已建立的 CAPWAP数据隧道后, 可向 AC发送关闭已建立的 CAPWAP数据隧 道的确认信息。
在上述实施例中, 所述 CAPWAP控制隧道可通过回应(Echo)报 文维护状态。 所述 CAPWAP数据隧道可通过保活(Keep alive)¾文维 护状态。
WTP在工作于第一本地转发模式之后,不在 CAPWAP数据隧道 向 AC发送保活(keep-alive)报文给 AC , 相应地, AC在获知 WTP关 闭已建立的 CAPWAP数据隧道后, 关闭针对该 WTP 的保活 4艮文处 理过程, 保证该 WTP工作正常。
本发明实施例提供的无线局域网中的转发方法, WTP在工作于 第一本地转发模式时, 通过不建立 CAPWAP 数据隧道或关闭 CAPWAP数据隧道, 能够不受在本地转发场景下的 CAPWAP数据隧
道中断的影响, 保证 WTP业务的正常进行。
图 1 B 是本发明实施例提供的无线局域网中的转发方法的流程 图。 参照图 1 B , 本发明实施例提供一种无线局域网中的转发方法, 所述方法基于 AC而描述, 包括:
21、 AC确定 WTP 的转发模式, 所述转发模式包括: 隧道转发 模式和第一本地转发模式。
可选地, 在本步骤 21之前, AC可以向所述 WTP发送 CAP WAP 报文, 所述 CAPWAP报文中包含有转发模式指示信息, 当然, 所述 CAPWAP报文中还可包含必要的配置信息, 例如第一本地转发模式 的配置信息。 所述 WTP接收到所述 CAPWAP报文后, 即可根据所 述 CAPWAP报文中的转发模式指示信息来确定转发模式。 WTP在确 定自身的转发模式之后, 会与 AC进行交互, 从而 AC可根据 WTP 的响应来确定 WTP的转发模式。
22、 所述 AC在确定所述 WTP工作于第一本地转发模式时, 不 建立 CAPWAP数据隧道; 或者, 所述 AC在确定所述 WTP 工作于 第一本地转发模式, 且在已建立 CAPWAP数据隧道时, 关闭保活报 文处理过程。
所述 AC在确定所述 WTP工作于第二本地转发模式下时, 与所 述 WTP建立 CAPWAP数据隧道。 例如, 所述 WTP在从第一本地转 发模式切换到第二本地转发模式时, 所述 AC与所述 WTP重新建立 CAPWAP数据隧道。
在本发明实施例中, AC可与所述 WTP之间只建立 CAPWAP控 制隧道, 而不建立 CAPWAP数据隧道。 此种方式例如可适用于 WTP 初次上电即为第一本地转发模式的情况。
AC在已建立 CAPWAP数据隧道时可关闭保活报文处理过程。 此种方式例如可适用于 WTP先前被指示工作于第二本地转发模式, 已建好 CAPWAP控制隧道和 CAPWAP数据隧道, 而后指示切换到 第一本地转发模式的情况。
WTP在工作于第一本地转发模式时,不再在 CAPWAP数据隧道
发送保活报文给 AC , 相应地, AC关闭针对该 WTP的保活报文处理 过程, 保证该 WTP工作正常。
AC 只 根据 CAPWAP 控制 隧道的 回应(echo)报文来维持 CAPWAP控制隧道的状态。 当 AC在一定间隔内没有收到 WTP发送 的回应(echo)报文时才会复位 CAPWAP控制隧道和 CAPWAP数据隧 道以重新与 WTP建立 CAPWAP控制隧道和 CAPWAP数据隧道。 而 在别的情况下, AC认为 CAPWAP隧道状态正常。
本发明实施例提供的无线局域网中的转发方法, AC在工作于第 一本地转发模式时,通过不建立 CAPWAP数据隧道或关闭 CAPWAP 数据隧道, 能够不受在本地转发场景下的 CAPWAP数据隧道中断的 影响, 保证 WTP业务的正常进行。 为更好的理解本发明, 下面以具体实施例为例来对本发明进行 进一步说明。 亦须注意, 以下所列举的实施例只是本发明的一部分 实施例, 本领域技术人员由本发明所述内容, 可易于想到其他实施 例, 它们都在本发明的范围内。
参照图 2 , 本实施例提供一种无线局域网中的转发方法, 所述 方法可包括:
WTP在上电后, 接收 AC发送的 CAPWAP报文, 所述 CAPWAP 报文指示 WTP工作于第一本地转发模式。
所述 WTP确定自身支持第一本地转发模式, 工作于第一本地转 发模式。
所述 WTP 与所述 AC之间只建立 CAPWAP控制隧道, 而不建 立 CAPWAP数据隧道。
所述 WTP向所述 AC发送回应请求(Echo Request)报文。
所述 AC接收到所述回应请求报文后 , 向所述 WTP发送回应响 应 (Echo Response)才艮文。
在上面的过程中, WTP在上电后即工作于第一本地转发模式, 通过只建立 CAPWAP 控制隧道, 而不建立 CAPWAP数据隧道, 能
够不受在本地转发场景下的 CAPWAP 数据隧道中断的影响, 保证 WTP业务的正常进行。
所述 WTP在工作于第一本地转发模式一段时间后, 若收到所述 AC指示工作于隧道转发模式的报文, 则此时, 所述 WTP与所述 AC 建立 CAPWAP数据隧道, 在数据传输过程中, 所述 WTP通过所述 CAPWAP 数据隧道将数据传送给所述 AC , 并向所述 AC 发送保活 (keep-alive)报文, 维护此 CAPWAP数据隧道。
所述 WTP在工作于隧道转发模式后, 若又收到 AC指示工作于 第一本地转发模式的报文, 则所述 WTP再次切回到第一本地转发模 式。 由于在之前的隧道转发模式中已建立了 CAPWAP数据隧道, 此 时, WTP在第一本地转发模式下时, 可通过关闭 CAPWAP数据隧道 来消除 CAPWAP数据隧道。 其中, 由于 CAPWAP协议基于 UDP协 议, 关闭 CAPWAP 数据隧道可具体为关闭该 UDP 对应的端口 (socket)。 WTP 在关闭 CAPWAP 数据隧道后, 可向 AC 发送关闭 CAPWAP数据隧道的确认信息。
在上述过程中, WTP 在工作于第一本地转发模式时, 不再在 CAPWAP数据隧道发送保活报文给 AC , 相应地, AC在接收到关闭 CAPWAP数据隧道的确认信息后,关闭针对该 WTP的保活 文处理 过程, 保证该 WTP工作正常。
同时, AC 只根据 CAPWAP 控制隧道的回应(echo)报文来维持 CAPWAP隧道的状态。 当 AC在一定间隔内没有收到 WTP发送的回 应(echo)报文时,会复位 CAPWAP隧道以重新与 WTP建立 CAPWAP 控制隧道和 CAPWAP数据隧道。而在别的情况下, AC认为 CAPWAP 隧道状态正常。
如此一来, 不论 WTP是初始处于第一本地转发模式抑或是在切 换回到第一本地转发模式, 都能够不受在本地转发场景下的 CAPWAP数据隧道中断的影响, 保证 WTP业务的正常进行。 与本发明实施例提供的无线局域网中的转发方法相对应, 如图
3A所示, 本发明实施例还提供一种 WTP 装置 30 , 所述 WTP装置 30可包括确定单元 3 1和处理单元 32。 其中:
确定单元 3 1 , 用于确定转发模式, 所述转发模式包括: 隧道转 发模式和第一本地转发模式;
处理单元 32 , 用于在确定单元 3 1 确定工作于第一本地转发模 式下时, 不建立 CAPWAP数据隧道; 或者, 用于在所述确定单元 3 1 确定工作于第一本地转发模式下,且在已建立 CAPWAP数据隧道时 , 关闭 CAPWAP数据隧道。
可选地, 所述转发模式还包括第二本地转发模式, 所述处理单 元 32还用于:
在工作于第二本地转发模式下时, 与所述 AC建立 CAPWAP数 据隧道。
本发明实施例提供的 WTP 装置, 在工作于第一本地转发模式 时, 通过不建立 CAPWAP数据隧道或关闭 CAPWAP数据隧道, 能 够不受在本地转发场景下的 CAPWAP 数据隧道中断的影响, 保证 WTP业务的正常进行。
在本发明的一个实施例中, 所述处理单元 32还可用于: 在 WTP与 AC之间建立 CAPWAP控制隧道;
在第一本地转发模式下, 不建立 CAPWAP数据隧道。
在本发明的另一个实施例中, 所述处理单元 32还可用于: 在 WTP与 AC之间分别建立 CAPWAP控制隧道和 CAPWAP数 据隧道;
在第一本地转发模式下时, 关闭 CAPWAP数据隧道。
其中, 所述 CAPWAP控制隧道通过回应 4艮文维护状态。
进一步地,如图 3B所示,所述 WTP装置还可包括接收单元 33 , 其巾:
接收单元 33 ,用于接收 AC发送的 CAPWAP报文,所述 CAPWAP 报文中包含有转发模式指示信息;
所述确定单元 3 1用于:
根据所述 CAPWAP 报文中的转发模式指示信息来确定转发模 式。
指出的是, 本发明实施例提供的 WTP装置与前文基于 WTP描 述的无线局域网中的转发方法相对应, 由于在前文中已对该方法进 行了详细描述, 因而相应内容可参照这些描述内容, 在此不再贅述。 与本发明实施例提供的无线局域网中的转发方法相对应, 如图
4A所示, 本发明实施例还提供一种 AC装置 40 , 所述 AC装置 40 可包括确定单元 41和处理单元 42 , 其中:
确定单元 41 , 用于确定 WTP的转发模式, 所述转发模式包括: 隧道转发模式和第一本地转发模式;
处理单元 42 , 用于在所述确定单元确定所述 WTP 工作于第一 本地转发模式时, 不建立 CAPWAP数据隧道; 或者, 用于在所述确 定单元确定所述 WTP 工作于第一本地转发模式, 且在已建立 CAPWAP数据隧道时, 关闭保活报文处理过程。
可选地, 所述转发模式还包括第二本地转发模式。 所述处理单 元 42还用于:
在确定单元 41 确定所述 WTP工作于第二本地转发模式下时, 与所述 WTP建立 CAPWAP数据隧道。
本发明实施例提供的 AC装置, 在工作于第一本地转发模式时, 通过不建立 CAPWAP 数据隧道或关闭 CAPWAP数据隧道, 能够不 受在本地转发场景下的 CAPWAP 数据隧道中断的影响, 保证 WTP 业务的正常进行。
可选地, 在本发明的一个实施例中, 所述处理单元 42还用于: 在所述 AC装置与所述 WTP之间建立 CAPWAP控制隧道; 在所述确定单元 41确定所述 WTP工作于第一本地转发模式时 , 不建立 CAPWAP数据隧道。
可选地,在本发明的另一个实施例中,所述处理单元 42还用于: 在所述 AC装置与所述 WTP之间分别建立 CAPWAP控制隧道
和 CAP WAP数据隧道;
在所述确定单元确定所述 WTP工作于第一本地转发模式时, 关 闭保活报文处理过程。
进一步地, 如图 4B所示, 所述 AC装置还可包括发送单元 43。 其巾:
发送单元 43 , 用于向所述 WTP 发送 CAPWAP 报文, 所述 CAPWAP报文中包含有转发模式指示信息,以使所述 WTP根据所述 CAPWAP报文中的转发模式指示信息来确定转发模式。
指出的是,本发明实施例提供的 AC装置与前文基于 AC描述的 无线局域网中的转发方法相对应, 由于在前文中已对该方法进行了 详细描述, 因而相应内容可参照这些描述内容, 在此不再贅述。
值得注意的是, 上述各个装置实施例中, 所包括的各个单元只 是按照功能逻辑进行划分的, 但并不局限于上述的划分, 只要能够 实现相应的功能即可; 另外, 各功能单元的具体名称也只是为了便 于相互区分, 并不用于限制本发明的保护范围。
本领域普通技术人员可以理解实现上述实施例方法中的全部或 部分步骤是可以通过程序来指令相关的硬件完成, 所述的程序可以 存储于一种计算机可读存储介质中, 所述存储介质可以是只读存储 器、 磁盘或光盘等。
以上所述, 仅为本发明的具体实施方式, 但本发明的保护范围 并不局限于此, 任何熟悉本技术领域的技术人员在本发明揭露的技 术范围内, 可轻易想到变化或替换, 都应涵盖在本发明的保护范围 之内。 因此, 本发明的保护范围应以权利要求的保护范围为准。
Claims
1、 一种无线局域网中的转发方法, 其特征在于, 所述方法包括: 无线终端点 WTP确定转发模式, 所述转发模式包括: 隧道转发 模式和第一本地转发模式;
所述 WTP在第一本地转发模式下, 不建立 CAPWAP数据隧道; 或者,
所述 WTP在第一本地转发模式下, 在已建立 CAPWAP数据隧道 时, 关闭 CAPWAP数据隧道。
2、 根据权利要求 1 所述的方法, 其特征在于, 所述转发模式还 包括第二本地转发模式, 所述方法还包括:
所述 WTP 在工作于第二本地转发模式下时, 与所述 AC 建立 CAPWAP数据隧道。
3、 根据权利要求 2所述的方法, 其特征在于, 所述方法还包括: WTP接收 AC发送的 CAPWAP报文, 所述 CAPWAP报文中包含 有转发模式指示信息;
所述 WTP确定转发模式包括:
WTP根据所述 CAPWAP报文中的转发模式指示信息来确定转发 模式。
4、 一种无线局域网中的转发方法, 其特征在于, 所述方法包括: 接入控制器 AC确定无线终端点 WTP 的转发模式, 所述转发模 式包括: 隧道转发模式和第一本地转发模式;
所述 AC在确定所述 WTP 工作于第一本地转发模式时, 不建立 CAPWAP数据隧道; 或者
所述 AC在确定所述 WTP 工作于第一本地转发模式, 且在已建 立 CAPWAP数据隧道时, 关闭保活报文处理过程。
5、 根据权利要求 4 所述的方法, 其特征在于, 所述转发模式还 包括第二本地转发模式, 所述方法还包括:
所述 AC在确定所述 WTP 工作于第二本地转发模式下时, 与所 述 WTP建立 CAPWAP数据隧道。
6、 根据权利要求 5所述的方法, 其特征在于, 所述方法还包括: 所述 AC向所述 WTP发送 CAPWAP报文,所述 CAPWAP报文中 包含有转发模式指示信息, 以使所述 WTP根据所述 CAPWAP报文中 的转发模式指示信息来确定转发模式。
7、 一种无线终端点 WTP装置, 其特征在于, 所述 WTP装置包 括:
确定单元, 用于确定转发模式, 所述转发模式包括隧道转发模式 和第一本地转发模式;
处理单元, 用于在所述确定单元确定工作于第一本地转发模式下 时, 不建立 CAPWAP数据隧道; 或者,
用于在所述确定单元确定工作于第一本地转发模式下, 且在已建 立 CAPWAP数据隧道时, 关闭 CAPWAP数据隧道。
8、 根据权利要求 7所述的 WTP装置, 其特征在于, 所述转发模 式还包括第二本地转发模式,
所述处理单元用于:
在所述确定单元确定工作于第二本地转发模式下时, 与所述 AC 建立 CAPWAP数据隧道。
9、 根据权利要求 8 所述的 WTP装置, 其特征在于, 所述 WTP 装置还包括:
接收单元, 用于接收 AC发送的 CAPWAP报文, 所述 CAPWAP 报文中包含有转发模式指示信息;
所述确定单元用于:
根据所述接收单元接收的 CAPWAP 报文中的转发模式指示信息 来确定转发模式。
10、 一种接入控制器 AC装置, 其特征在于, 所述 AC装置包括: 确定单元, 用于确定无线终端点 WTP 的转发模式, 所述转发模 式包括: 隧道转发模式和第一本地转发模式;
处理单元, 用于在所述确定单元确定所述 WTP 工作于第一本地
转发模式时, 不建立 CAPWAP数据隧道; 或者
用于在所述确定单元确定所述 WTP 工作于第一本地转发模式, 且在已建立 CAPWAP数据隧道时, 关闭保活报文处理过程。
1 1、 根据权利要求 10 所述的 AC装置, 其特征在于, 所述转发 模式还包括第二本地转发模式,
所述处理单元还用于:
在所述确定单元确定所述 WTP 工作于第二本地转发模式下时, 与所述 WTP建立 CAPWAP数据隧道。
12、 根据权利要求 1 1所述的 AC装置, 其特征在于, 所述 AC装 置还包括:
发送单元, 用于向所述 WTP发送 CAPWAP报文, 所述 CAPWAP 报文中包含有转发模式指示信息, 以使所述 WTP根据所述 CAPWAP 报文中的转发模式指示信息来确定转发模式。
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