公开(公告)号：US20050032540A1

公开(公告)日：2005-02-10

申请号：US10446343

申请日：2003-05-28

Applicant: Chieh-Ho Lee ,  Chung-ju Chang

Inventor： Chieh-Ho Lee ,  Chung-ju Chang

IPC: H04B7/005 ,  H04W52/12 ,  H04W52/14 ,  H04W52/24 ,  H04B7/00

CPC classification number: H04W52/248 ,  H04W52/12 ,  H04W52/146 ,  H04W52/241 ,  H04W52/245

Abstract: 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.

Abstract translation: 提供了一种用于控制无线蜂窝系统中的各个移动台的发射功率电平的装置和方法，其中以受控功率电平从发射机发送信号，使得平均接收功率电平或平均信号干扰比（ SIR）接近期望水平，从而实现所期望的信号质量。 根据第一实施例，基于整体平均小区间干扰功率电平和期望的SIR电平来计算平均接收信号功率的期望电平。 根据第二实施例，基于平均期望信号功率和整体平均干扰功率来估计接收的平均SIR电平。 将平均接收功率电平（平均SIR值）与期望电平进行比较以产生功率控制命令。 功率控制命令被反馈到移动台以指示移动台的发送功率的调整。

公开(公告)号：US5812526A

公开(公告)日：1998-09-22

申请号：US576808

申请日：1995-12-21

Applicant: Chung-Ju Chang ,  Ray-Guang Cheng ,  Tzung-Pao Lin ,  Ming-Chia Hsieh ,  Yao-Tzung Wang

Inventor： Chung-Ju Chang ,  Ray-Guang Cheng ,  Tzung-Pao Lin ,  Ming-Chia Hsieh ,  Yao-Tzung Wang

IPC: H04L12/56 ,  H04J3/14

CPC classification number: H04L12/5602

Abstract: 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.

Abstract translation: 提供了一种用于控制异步传输模式（ATM）通信网络的节点处的拥塞的系统和过程。 该过程和系统利用模糊逻辑来确定是否“承认”，即为节点新的通信（或呼叫）分配虚拟信道（VC）。 模糊逻辑也用于控制传送到节点的速率信元已被“承认”的通信，即VC已经被分配了。 准入控制中带宽估计的模糊逻辑规则可以从“等效容量”模型开发。 用于调整小区传输速率的模糊逻辑规则可以从“两阈值”拥塞控制模型开发。

公开(公告)号：US20120008497A1

公开(公告)日：2012-01-12

申请号：US12803799

申请日：2010-07-07

Applicant: Wen-Shiang Tang ,  Chung-Ju Chang ,  Wei-Chien Wang

Inventor： Wen-Shiang Tang ,  Chung-Ju Chang ,  Wei-Chien Wang

IPC: H04L12/24

CPC classification number: H04L47/12 ,  H04L12/437 ,  H04L47/17 ,  H04L47/263 ,  H04L47/30 ,  H04L47/629

Abstract: A method of bandwidth allocation in a Resilient Packet Ring (RPR) network includes: congestion degree of a present node in the RPR network is determined. There is an upstream node and a downstream node of the present node in the RPR network. A present local arrival rate of local traffic flows of the present node from at least one client is obtained. An average transit rate of fairness eligible (FE) flows of the present node in a past time period is calculated. An effective node number for the present node and a present temporal fair rate of the present node are calculated respectively. A present local fair rate of the present node is obtained by looking up a local fair rate table. Transit rate transmitted by the upstream node is controlled according to the present local fair rate of the present node.

Abstract translation: 弹性分组环（RPR）网络中的带宽分配方法包括：确定RPR网络中当前节点的拥塞度。 在RPR网络中存在本节点的上游节点和下游节点。 获得来自至少一个客户端的本节点的本地业务流的当前本地到达速率。 计算当前节点在过去时间段内平均公平符合条件（FE）流量的平均传输速率。 分别计算本节点的有效节点号和当前节点的当前时间公平率。 通过查找本地公平比率表来获得当前节点的当前公平比率。 上游节点传输的传输速率根据当前节点本地公平率进行控制。

公开(公告)号：US07653041B2

公开(公告)日：2010-01-26

申请号：US11128794

申请日：2005-05-12

Applicant: Chih-Yung Shih ,  Ray-Guang Cheng ,  Chung-Ju Chang ,  Yih-Shen Chen

Inventor： Chih-Yung Shih ,  Ray-Guang Cheng ,  Chung-Ju Chang ,  Yih-Shen Chen

IPC: H04W4/00 ,  H04W72/00 ,  H04J3/16 ,  H04J3/24 ,  H04B7/212

CPC classification number: H04W74/02 ,  H04W52/0216 ,  H04W74/06 ,  Y02D70/142

Abstract: 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.

Abstract translation: 本发明提供了一种支持WLAN集成业务的功率效率传输方法。 所述发明结合了基于轮询和基于争用的机制，命名为点播轮询（ODP）。 在ODP方案中，当处于活动模式时，语音站位于轮询列表中。 在空闲模式下，它被配置为在睡眠模式下工作以节省电力。 此外，它采用基于争用的机制，从空闲模式返回时再次加入列表。 另一方面，数据站采用基于竞争的机制通过WLAN传输其数据包。 此外，为了实现服务差异，所述发明还采用用于语音数据服务的优先接入概率。 仿真结果表明，本发明可以降低语音站的功耗，提高数据站的吞吐量。

公开(公告)号：US07042884B2

公开(公告)日：2006-05-09

申请号：US10046325

申请日：2001-10-19

Applicant: Keng-Ming Huang ,  Chung-Ju Chang ,  Fang-Yong Lee ,  Kuang-Chih Liu

Inventor： Keng-Ming Huang ,  Chung-Ju Chang ,  Fang-Yong Lee ,  Kuang-Chih Liu

IPC: H04L12/56 ,  G06F15/16 ,  G06F12/08

CPC classification number: H04L45/54 ,  H04L45/04

Abstract: 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.

公开(公告)号：US07236786B2

公开(公告)日：2007-06-26

申请号：US10872572

申请日：2004-06-22

Applicant: Jia-Ching Shen ,  Yih-Shen Chen ,  Chung-Ju Chang ,  Yung-Han Chen ,  Yi-Ting Wang ,  Meng-Chun Chang

Inventor： Jia-Ching Shen ,  Yih-Shen Chen ,  Chung-Ju Chang ,  Yung-Han Chen ,  Yi-Ting Wang ,  Meng-Chun Chang

IPC: H04Q7/20 ,  H04Q7/00

CPC classification number: H04W36/02

Abstract: 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.

Abstract translation: 用于在WLAN类通信系统中提供快速切换的方法和系统基于加权切换趋势系数构建缓存候选集。 加权切换趋势系数基于切换矩阵和权重因子。 切换矩阵是自适应二维阵列，其提供相对于移动台的附近接入点的列表，加权因子是基于信号质量指示对附近接入点进行优先级的值。 家庭接入点一旦被触发来初始化主动缓存，就在缓存候选集之间的接入点与接入点之间的连接传送之前，将移动台的登记数据提供给缓存候选集。

公开(公告)号：US20060256765A1

公开(公告)日：2006-11-16

申请号：US11128794

申请日：2005-05-12

Applicant: Chih-Yung Shih ,  Ray-Guang Cheng ,  Chung-Ju Chang ,  Yih-Shen Chen

Inventor： Chih-Yung Shih ,  Ray-Guang Cheng ,  Chung-Ju Chang ,  Yih-Shen Chen

IPC: H04J3/16 ,  H04L12/413 ,  H04L12/403

CPC classification number: H04W74/02 ,  H04W52/0216 ,  H04W74/06 ,  Y02D70/142

Abstract: 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.

Abstract translation: 本发明提供了一种支持WLAN集成业务的功率效率传输方法。 所述发明结合了基于轮询和基于争用的机制，命名为点播轮询（ODP）。 在ODP方案中，当处于活动模式时，语音站位于轮询列表中。 在空闲模式下，它被配置为在睡眠模式下工作以节省电力。 此外，它采用基于争用的机制，从空闲模式返回时再次加入列表。 另一方面，数据站采用基于竞争的机制通过WLAN传输其数据包。 此外，为了实现服务差异，所述发明还采用用于语音数据服务的优先接入概率。 仿真结果表明，本发明可以降低语音站的功耗，提高数据站的吞吐量。

公开(公告)号：US06563792B1

公开(公告)日：2003-05-13

申请号：US09346909

申请日：1999-07-02

Applicant: Chung-Ju Chang ,  Zohn-Shiun Eul ,  Hong-Yuh Lee

Inventor： Chung-Ju Chang ,  Zohn-Shiun Eul ,  Hong-Yuh Lee

IPC: H04L1256

CPC classification number: H04L47/20 ,  H04L12/5601 ,  H04L12/5602 ,  H04L47/215 ,  H04L2012/5636 ,  H04L2012/5637

Abstract: 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.

Abstract translation: 为了提高ATM网络连接的选择性，响应性和平均排队延迟性能，引入了一种模糊漏桶方法和装置，该模糊泄漏方法和装置利用模糊增量控制器（FIC）监视和控制连接的可持续信元速率， 动态地调整用于管理连接的漏斗桶内容的增量值。 通过模糊逻辑的增量调整是通过一组基于域知识的语言规则来实现的。 将长期平均信元速率和连接的短期平均信元速率的两个系统参数馈送到模糊增量控制器中以自适应地计算适当的增量值，目的是实现更好的性能。