Industrial Technology Research Institute

Accton Technology Corporation

Chunghwa Telecom Co., Ltd.

National Yang Ming Chiao Tung University

Acute Technology Corp.

Chung-Ju Chang

Ray-Guang Cheng

Yih-Shen Chen

Yao-Tzung Wang

Tzung-Pao Lin

Chieh-Ho Lee

Chih-Sheng Chang

Meng-Chun Chang

Yi-Ting Wang

Chih-Yung Shih

Yung-Han Chen

Jia-Ching Shen

Huai-Chih Ma

Kuang-Chih Liu

Chung Hsin Lu

Fang-Yong Lee

Hong-yuh Lee

Ji-Hsiang Yu

Keng-Ming Huang

Jan-Wen Peng

Hsing-Yi Wu

Zohn-Shiun Eul

Jiunn-Bin Chen

Hung-Ming Chi

Lain-Chyr Hwang

Ming-Chia Hsieh

Fang-Chin Ren

Jian-An Chen

A dynamic bandwidth allocation method of an Ethernet passive optical network, comprises a predictor and a rule of QoS-promoted dynamic bandwidth allocation (PQ-DBA); the predictor predicts a client behavior and numbers of various kinds of packets by using a pipeline scheduling predictor consisted of a pipelined recurrent neural network (PRNN), and a learning rule of the extended recursive least squares (ERLS); the present invention establishes a better QoS traffic management for the OLT-allocated ONU bandwidth and client packets sent by priority.

Dynamic bandwidth allocation method of Ethernet passive optical network

This invention provides a method for power-efficient transmission supporting integrated service over WLAN. The said invention combines the polling-based and the contention-based mechanisms, named on-demand polling (ODP). In the ODP scheme, a voice station is in the polling list when it is in the active mode. During the idle mode, it is configured to operate in the sleep mode for saving power. Also, it adopts the contention-based mechanism to join the list again while returning from the idle mode. On the other hand, the data station adopts the contention-based mechanism to transmit its packets over WLAN. In addition, to achieve service differentiation, the said invention also employs a prioritized access probability for voice over data services. Simulation results show that the said invention can reduce the power consumption for voice stations and enhance the throughput for data stations.

Method for power-efficient transmission supporting integrated services over wireless local area network

Methods and apparatuses for a closed-loop power control in a code-division multiple-access communication system wherein both received signal quality and communication channel quality are used to determine appropriate transmitter power, and transmission may be suspended when a channel quality metric, such as by short-term fading, degrades below a preset minimum threshold, or when a commanded transmitter power exceeds a preset maximum threshold, and wherein the transmitter power is controlled to mitigate fading effects so that received signal quality metric, such as by the average received signal power or by the average received SIR over a control cycle, approaches a preset desired level, and by momentarily suspending a remote terminal, overall system capacity and throughput may be enhanced.

Closed-loop power control method for a code-division multiple-access cellular system

The present invention provides a method using Q-learning rule to accurately estimate the transmission cost for the multi-rate transmission control (MRTC) for RRC (radio resource control) in the WCDMA network. This method comprises the following iterative steps: first obtaining a system state and an action using an incoming request, a mean of interference and a variance of interference, then obtaining Q values based on the system state and the action. Afterwards, allocating an optimal action with the Q values, and when a new request with a new state arrives, going back to the first step and updating the Q values using the new state and a cost function based on the system state and the action.

Q-learning-based multi-rate transmission control (MRTC) scheme for RRC in WCDMA systems

Methods and systems for providing fast handoff in WLAN-like communications system construct a caching candidate set based upon a weighted handoff tendency coefficient. The weighted handoff tendency coefficient is based upon the handoff matrix and the weighting factor. The handoff matrix is an adaptive two-dimensional array that provides a list of nearby access points relative to a mobile station and the weighting factor is a value that prioritizes the nearby access points based upon a signal quality indication. A home access point, once it is triggered to initialize proactive caching, provides the caching candidate set with registration data of the mobile station before a transfer of a connection between the home access point and one of the access points on the caching candidate set.

Method and system for providing fast handoff in a WLAN-like communication system using active neighboring sets

An apparatus and method is provided for controlling transmission power levels of respective mobile stations in a wireless cellular system, wherein the signal is transmitted from a transmitter at a controlled power level so that either the average received power level or the average signal to interference ratio (SIR) at receiver is close to a desired level so that the desired signal quality is achieved. According to a first embodiment, the desired level for the average received signal power is calculated based on the ensemble average intercell interference power level and the desired SIR levels. According to a second embodiment, the received average SIR level is estimated based on the average desired signal power and the ensemble average interference power. The average received power level (average SIR value) is compared to the desired level to generate a power control command. The power control command is fed back to the mobile station to instruct the adjustment of transmission power of the mobile station.

Power control apparatus for achieving respective desired signal quality levels in wireless communication systems and method

The present invention discloses a network address forwarding table lookup apparatus and method for identifying a network address to determine a next hop address to which data packets having the network address should be forwarded. The apparatus comprises a memory storing a compression-trie forwarding table. The forwarding table has multiple level modules in a compression-trie structure. With the present invention, it is possible to achieve fast IP address lookup with a compact-sized compression-trie forwarding table.

Network address forwarding table lookup apparatus and method

To improve the performance in terms of selectivity, responsiveness, and mean queueing delay for a connetion in ATM networks, a fuzzy leaky bucket method and apparatus is introduced that monitors and controls the sustainable cell rate of the connection utilizing a fuzzy increment controller (FIC) to dynamically adjust the value of the increment for the content of the leaky bucket incorporated for policing the connection. The adjustment of the increment by the fuzzy logic is accomplished through a set of linguistic rules based upon a domain knowledge. Two system parameters of the long-term mean cell rate and the short-term mean cell rate of the connection are fed into the fuzzy increment controller to adaptively calculate an appropriate increment value with an aim to achieve a better performance.

Fuzzy leaky bucket method and apparatus for usage parameter control in ATM networks

The present invention is to provide an Ethernet switch fabric controller requiring output port buffer unit of less capacity while still working with an Ethernet switch to smoothly forward the packet from each input port of the Ethernet switch to an output port corresponding to the packet header at the input port. It is featured by the use of proper number of temporary buffer units each of proper length, and output port buffer unit of proper length.

System and method for reducing capacity demand of ethernet switch controller

A method and system are disclosed for constructing a power spectrum based connection admission control table and using such a table in a communications network, such as an ATM network. Power spectrum parameters, such as the power spectrum DC component .gamma., half power bandwidth B.sub.w and average power .PSI..sub.w are transformed to .gamma., an equivalent half power bandwidth B.sub.e and an equivalent average power .PSI..sub.e, where B.sub.e is a predetermined constant. Since B.sub.e is constant, the transformation reduces the memory requirements for constructing a connection admission control table.

Power spectrum-based connection admission control for ATM networks

A system and process are provided for controlling congestion at a node of an asynchronous transfer mode (ATM) communications network. The process and system utilize fuzzy logic in determining whether or not to 'admit,' i.e., allocate a virtual channel (VC) for, new communications (or calls) to the node. Fuzzy logic is also use to control the rate cells are transmitted to the node for communications already 'admitted,' i.e., for which a VC has already been allocated. The fuzzy logic rules for bandwidth estimation in admission control may be developed from an 'equivalent capacity' model. The fuzzy logic rules for adjusting cell transmission rates may be developed from a 'two-threshold' congestion control model.

Traffic control mechanism in ATM communications network

The present invention is related to a method adapted to be used in hashing algorithm for reducing conflict probability which comprises the steps of receiving a first physical address of a frame; generating a hashing address corresponding to the first physical address; comparing a second physical address corresponding to the hashing address with the first physical address to determine if the first and the second physical addresses match with each other; completing a packet calling process when the first and the second physical addresses match with each other, but going back to the comparing process when the first and the second physical addresses do not match with each other, to determine whether there is another second physical address corresponding to the hashing address and matching with the first physical address; and ending the packet calling process when a number of times that the comparing process is proceeded is greater than a reference value. By this method, a specific conflict probability is obtained, and according to the results, the conflict probability and the broadcasting probability are reduced and the source of the network is saved.

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Taipei, Taiwan

Chung-Ju Chang