Thomson Licensing

Zhi Gang Zhang

Lin Cheng

Xian Wang

Huan Zhang

Chuanming Wang

Yan Zhang

Xiao Ming Ma

Junbiao Zhang

Li Zou

Heinrich Schemmann

Jian Chen

Charles Chunaming Wang

Jin Yu

Kui Gao

Xiao-Jin Ma

Jian Song Li

Xiao Jun Ma

Huan Qiang Zhang

Lin Xiang Cheng

Xian Lei Wang

The present invention provides an access point device, a communication unit and a method for access to a communication media in a communication network. The access point comprises a communication interface for exchanging data with a plurality of communication units in the communication network via the communication media; and a processor for receiving a media access request message in a contention mode from at least one communication unit of the plurality of communication units via the communication interface; and polling the at least one communication unit by assigning a media access duration to each of the at least one communication unit according to a corresponding duration information for media access in the received media access request message.

Accessing a communication media using both a contention period and a polling period

A fast retransmission method by introducing the internal node under better channel condition to join the work of retransmission after the destination node sends out the packet loss indication for unicast services. Extended to serve multicast services, a system comprising a plurality of nodes utilizes the farthest node in each branch from the source to transmit an acknowledge signal when packet loss occurs. The system then enables the closest node to the acknowledging node to retransmit the requested packet, thereby improving the target packet hit rate and data integrity with less retransmission steps.

Apparatus and method for fast retransmission in a power line communication network

The present invention provides a method and a device for classifying data frames. The method is typically carried out by a communication device in a wireless network with quality of service capability. It comprises the step of comparing data in a frame to data in a plurality of classifier entries, wherein the order of comparison of the classifier entries with a frame is a function of a quality of service priority level, and the step of classifying a frame for which a match is found as a function of a parameter associated with the matching classifier entry.

Method and system for frame classification

A method to implement an adaptive multicast data rate transmission selection includes determining the lowest signal strength station in a multicast group, using signal strength as an indicator to increase data rate, and determining if the increase in data rate is viable for multicast transmission by determining frame or packet loss using the increased data rate.

Method of data rate adaptation for multicast communication

An enhanced method and apparatus for reducing congestion in dynamic host configuration protocol network system are provided. The congestion reduction method comprises steps of receiving a DHCP request from a DHCP client; and stopping responding to a certain number of DHCPDISCOVER message. And the dynamic host configuration protocol server comprises at least one distributed server, at which the contents of the network service provider server are backed up.

Enhanced method and apparatus for reducing congestion in DHCP network system

The present invention relates a bidirectional signal transmission apparatus and method, wherein said apparatus comprises a processor unit connected in signal communication with an Ethernet, an RF modulation/demodulation unit, and an RF frequency conversion unit connected in signal communication with a coaxial cable network. The data signal input from the Ethernet is modulated into standard IEEE802.11 signal by means of said signal processing unit and RF modulation/demodulation unit, and then down-converted from 2.4 GHz or 5.8 GHz standard IEEE802.11 signal to a range of 500 MHz to 2000 MHz, and preferably to a range of 900 MHz to 1200 MHz. The bidirectional transmission apparatus further includes a frequency band selector for selecting different frequency bands so as to broaden the bandwidth of the signal and a real broad band data transmission is accomplished.

Bidirectional signal transmission apparatus and method

The invention is related with the problem of utilizing data compression in a network of distributed stations. Often header compression is used to improve the bandwidth usage in networks, in particular wireless networks. Header compression could be implemented in access points or routers, but both implementations have serious problems, e.g. due to limited CPU power, lack of scalability, or handover latency. To resolve the problems the invention proposes to use a dedicated data compression server in the network and a new protocol to transparently deploy data compression in the network.

Providing an independent compression server within a network, as well as a method, network station and DHCP server

Growing community of inventors

Beijing, China

Zhi Gang Zhang