Patents by Inventor Wumao Chen
Wumao Chen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10038571Abstract: A method for reading and writing a forwarding information base, including receiving a write an associated data (AD) request used to modify the AD and a write a keyword (Key) request used to modify the Key corresponding to the AD, and before the write AD request and the write Key request pass through a cache, transforming, when any one stage to be read and written includes the Key, a row address in the write AD request into a row address that is same as a row address of a node block on which the Key is located, or transforming, when any one stage to be read and written does not include the Key, a row address in the write AD request and a row address in the write Key request into a same row address in the any one stage.Type: GrantFiled: February 2, 2016Date of Patent: July 31, 2018Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Sheng Yang, Wumao Chen
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Publication number: 20160224603Abstract: A method for reading and writing a forwarding information base, including receiving a write an associated data (AD) request used to modify the AD and a write a keyword (Key) request used to modify the Key corresponding to the AD, and before the write AD request and the write Key request pass through a cache, transforming, when any one stage to be read and written includes the Key, a row address in the write AD request into a row address that is same as a row address of a node block on which the Key is located, or transforming, when any one stage to be read and written does not include the Key, a row address in the write AD request and a row address in the write Key request into a same row address in the any one stage.Type: ApplicationFiled: February 2, 2016Publication date: August 4, 2016Inventors: Sheng Yang, Wumao Chen
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Patent number: 8750323Abstract: A method and structure for switching data is provided. An output port scheduler obtains state information of VOQs and available state information of input port data channels and output port buffers. The output port scheduler sends scheduling request information to a FIC of an input port whose input port data channel is ready in input ports corresponding to non-empty VOQs pointing to an output port. After receiving the scheduling request information sent by the output port schedulers, the FIC of the selected input port selects to respond to a scheduling request of one output port scheduler, and sends the VOQ pointing to the output port in the selected input port to the output port buffer. The output port scheduler schedules the VOQ received by the output port buffer out of a switch chip. Buffer resources are saved and the switching performance is improved.Type: GrantFiled: January 11, 2012Date of Patent: June 10, 2014Assignee: Huawei Technologies Co., Ltd.Inventors: Wumao Chen, Dajun Zang
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Patent number: 8549193Abstract: A data transmission method is provided, which includes: obtaining a current queue length of a queue corresponding to an output port; when the current queue length meets a back-pressure requirement, determining a back-pressure priority corresponding to the current queue length according to the current queue length and a mapping relationship between a preset queue length and the back-pressure priority, and generating back-pressure information, where the back-pressure information inhibits a line card from sending data with a data priority less than or equal to the back-pressure priority to the output port; and sending the back-pressure information to a line card.Type: GrantFiled: May 11, 2012Date of Patent: October 1, 2013Assignee: Huawei Technologies Co., Ltd.Inventor: Wumao Chen
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Patent number: 8484388Abstract: A data transmission method is provided, which includes: obtaining a current queue length of a queue corresponding to an output port; when the current queue length meets a back-pressure requirement, determining a back-pressure priority corresponding to the current queue length according to the current queue length and a mapping relationship between a preset queue length and the back-pressure priority, and generating back-pressure information, where the back-pressure information inhibits a line card from sending data with a data priority less than or equal to the back-pressure priority to the output port; and sending the back-pressure information to a line card.Type: GrantFiled: May 11, 2012Date of Patent: July 9, 2013Assignee: Huawei Technologies Co., Ltd.Inventor: Wumao Chen
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Publication number: 20120254483Abstract: A data transmission method is provided, which includes: obtaining a current queue length of a queue corresponding to an output port; when the current queue length meets a back-pressure requirement, determining a back-pressure priority corresponding to the current queue length according to the current queue length and a mapping relationship between a preset queue length and the back-pressure priority, and generating back-pressure information, where the back-pressure information inhibits a line card from sending data with a data priority less than or equal to the back-pressure priority to the output port; and sending the back-pressure information to a line card.Type: ApplicationFiled: May 11, 2012Publication date: October 4, 2012Applicant: Huawei Technologies Co., Ltd.Inventor: Wumao Chen
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Publication number: 20120106564Abstract: A method and structure for switching data is provided. An output port scheduler obtains state information of VOQs and available state information of input port data channels and output port buffers. The output port scheduler sends scheduling request information to a FIC of an input port whose input port data channel is ready in input ports corresponding to non-empty VOQs pointing to an output port. After receiving the scheduling request information sent by the output port schedulers, the FIC of the selected input port selects to respond to a scheduling request of one output port scheduler, and sends the VOQ pointing to the output port in the selected input port to the output port buffer. The output port scheduler schedules the VOQ received by the output port buffer out of a switch chip. Buffer resources are saved and the switching performance is improved.Type: ApplicationFiled: January 11, 2012Publication date: May 3, 2012Applicant: Huawei Technologies Co., Ltd.Inventors: Wumao Chen, Dajun Zang
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Patent number: 7756147Abstract: The present invention provides a VLAN-based data packet transmission method and an Ethernet bridge device. The method includes: learning a member port corresponding to a VLAN according to a data packet received by an Ethernet bridge device, and storing a correspondence between a VLAN and the learnt member port; and forwarding the data packet by the Ethernet bridge device according to the correspondence between each VLAN and its member port that is stored.Type: GrantFiled: January 29, 2008Date of Patent: July 13, 2010Assignee: Huawei Technologies Co., Ltd.Inventors: Shifa Zhang, Zhijun Qu, Wumao Chen, Qiao Li
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Patent number: 7664053Abstract: Embodiments of the present invention provide a method and a system for implementing multicast using a slave block in DSL access technique. Several slave blocks are cascaded with a master block accessed to the DSL. The master block and slave block are respectively connected with DSL users via RTUs, and access an uplink via a network interface of the master block. The slave block is configured to support the IGMP proxy or the IGMP snooping so as to implement multicast function independently. This invention overcomes the shortcomings including the heavy burden on the master block, low efficiency and serious waste in bandwidth resulting from the fact that the operation of the slave block multicast member is implemented in the master block, thus increasing the efficiency of multicast and saving bandwidth of the master block.Type: GrantFiled: June 29, 2007Date of Patent: February 16, 2010Assignee: Huawei Technologies Co., Ltd.Inventors: Wumao Chen, Yong Luo, Dingbo Cao, Bo Ke, Meng Wu
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Publication number: 20080205296Abstract: The present invention provides a VLAN-based data packet transmission method and an Ethernet bridge device. The method includes: learning a member port corresponding to a VLAN according to a data packet received by an Ethernet bridge device, and storing a correspondence between a VLAN and the learnt member port; and forwarding the data packet by the Ethernet bridge device according to the correspondence between each VLAN and its member port that is stored. In the invention, the storage space of MAC address table of the Ethernet bridge device only needs to meet the requirement on the MAC address of its local user, thus the requirement of the access convergence network on the storage space of the MAC address table of the Ethernet bridge device may be lowered.Type: ApplicationFiled: January 29, 2008Publication date: August 28, 2008Inventors: Shifa Zhang, Zhijun Qu, Wumao Chen, Qiao Li
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Publication number: 20080123690Abstract: An embodiment of the invention provides a method for guaranteeing QoS of services in a broadband access network includes: establishing a plurality of logical channels between a plurality of subscriber access devices and a Broadband Access Server (BAS) respectively, allocating bandwidth resources for each of the plurality of logical channels; determining whether to allow a real-time service to access the broadband access network according to bandwidth resources occupation information of the plurality of logical channels. Embodiments of the invention provides a broadband access network and device for guaranteeing QoS of services as well.Type: ApplicationFiled: June 29, 2007Publication date: May 29, 2008Applicant: Huawei Technologies Co., Ltd.Inventors: Zhanfeng Wang, Rong Cheng, Wumao Chen
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Publication number: 20080123647Abstract: Embodiments of the present invention provide a method and a system for implementing multicast using a slave block in DSL access technique. Several slave blocks are cascaded with a master block accessed to the DSL. The master block and slave block are respectively connected with DSL users via RTUs, and access an uplink via a network interface of the master block. The slave block is configured to support the IGMP proxy or the IGMP snooping so as to implement multicast function independently. This invention overcomes the shortcomings including the heavy burden on the master block, low efficiency and serious waste in bandwidth resulting from the fact that the operation of the slave block multicast member is implemented in the master block, thus increasing the efficiency of multicast and saving bandwidth of the master block.Type: ApplicationFiled: June 29, 2007Publication date: May 29, 2008Applicant: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Wumao CHEN, Yong LUO, Dingbo CAO, Bo KE, Meng WU
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Publication number: 20080092213Abstract: A method, a system and an authentication server for realizing a secure assignment of a DHCP address are disclosed. The method includes: sending a DHCP Discovery message via an access network; obtaining the identification information of the DHCP client and performing an authenticating to the DHCP client based on the identification information; and only assigning the address to the DHCP client has passed the authentication. Therefore, in the present invention, access authentication may be performed on a subscriber according to location information, and IP address is only assigned to the valid subscriber and terminal. Therefore, the security of the address assignment in DHCP mode may be enhanced greatly. Moreover, in the present invention, addresses may be managed by an AAA server unitedly, or the addresses may be assigned after being authenticated by the AAA server successfully.Type: ApplicationFiled: October 29, 2007Publication date: April 17, 2008Applicant: Huawei Technologies Co., LTD.Inventors: Jiahong Wei, Jun Li, Wumao Chen
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Publication number: 20070030858Abstract: A broadband access device comprises a subscriber interface board, a master control board and a backboard, wherein the backboard is configured with a uniform serial bus; the subscriber interface board is configured with an interface unit; and the interface unit is connected to the master control board via the serial bus of backboard. A broadband access method comprises: connecting the master control board and subscriber interface board via a uniform serial bus; transforming the subscriber traffics into serial signal frames by the master control board or the subscriber interface board, and transmitting the serial signal frames to the other board; upon receiving the serial signal frames by the other board, restoring the format of the serial signal frames and transmitting the restored data to corresponding data channel. The present invention achieves broadband access when different access techniques are adopted, simplifies device structure and reduces costs.Type: ApplicationFiled: July 25, 2006Publication date: February 8, 2007Applicant: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Chuanning Chen, Wumao Chen, Yangbao Jin