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    GUARANTEEING TYPES OF SERVICE IN A PACKET-BASED SYSTEM
    82.
    发明专利
    GUARANTEEING TYPES OF SERVICE IN A PACKET-BASED SYSTEM 未知

    公开(公告)号：CA2330085A1

    公开(公告)日：2001-08-08

    申请号：CA2330085

    申请日：2001-01-03

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： ABRAHAM SANTOSH P ,  RAI GIRISH ,  CHUAH MOOI CHOO ,  HO JEAN TU

    IPC: H04L47/22 ,  H04L12/56 ,  H04Q7/20

    Abstract: A traffic management system for addressing quality-of-service concerns in a packet system combines a peak-rate shaper with weighted fair queuing scheduler for providing quality of service guarantees to a number of user connections. In one exampl e, a front- end peak-rate shaper is combined with weighted fair queuing scheduler for providing both peak rate shaping and an average bandwidth guarantee to a number of user connections In addition, a back-end peak-rate shaper is combined with the weighted fair queuing scheduler for ensuring packets are not transmitted at a data rate higher tha n the available downlink/uplink bandwidth.

    METHODS AND APPARATUS FOR ROUTE OPTIMIZATION IN A COMMUNICATIONS SYSTEM
    85.
    发明专利
    METHODS AND APPARATUS FOR ROUTE OPTIMIZATION IN A COMMUNICATIONS SYSTEM 未知

    公开(公告)号：CA2287613A1

    公开(公告)日：2000-06-07

    申请号：CA2287613

    申请日：1999-10-26

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： BUDKA KENNETH CARL ,  YUE ON-CHING ,  CHUAH MOOI CHOO

    IPC: H04W8/08 ,  H04W36/12 ,  H04W80/04 ,  H04Q3/66 ,  H04Q7/38

    Abstract: A route optimization technique in a GPRS network includes establishing a gateway GPRS support node in a visiting public land mobile network in which a roaming mobile station is currently located. Specifically, a tunnel is formed between the gateway GPRS support node and a serving GPRS support node to which the mobile station is in direct communication over a radio link. In this manner, external corresponding hosts may route packets to the gateway GPRS support node, rather than the GPRS support node in the mobile station's home public mobile network, as is done in conventional GPRS networks. Advantageously, a shorter path is established for transfer of packets between a mobile station and a corresponding host. A similar route optimization technique is provided in a CDPD network, wherein a home mobile dataintermediate system node (local HMD-IS) in the foreign (visiting) network serves as a gateway node to the roaming mobile-end system.

    METHODS AND APPARATUS FOR RETRANSMISSION BASED ACCESS PRIORITY IN A COMMUNICATIONS SYSTEM
    86.
    发明专利
    METHODS AND APPARATUS FOR RETRANSMISSION BASED ACCESS PRIORITY IN A COMMUNICATIONS SYSTEM 未知

    公开(公告)号：CA2281453A1

    公开(公告)日：2000-04-14

    申请号：CA2281453

    申请日：1999-09-08

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： ZHANG QINQING ,  YUE ON-CHING ,  CHUAH MOOI CHOO

    IPC: H04L29/06 ,  H04B7/26 ,  H04L12/28 ,  H04L12/56 ,  H04W12/10 ,  H04W74/08 ,  H04W84/04 ,  H04Q7/38

    Abstract: The present invention provides methods and apparatus for providing access priority in a MAC protocol of a communications system such as, for example, with respect to UMTS RACH. Particularly, the invention introduces several access priority methodologies including: (i) random chip delay access priority (RCDAP); (ii) random backoff based access priority (RBBAP); (iii) variable logical channel based access priority (VLCAP); (iv) UMTS-specific variable logical channel based access priority (VLCAP'); (v) probability based access priority (PBAP); and (vi) retransmission based access priority (REBAP). Each methodology associates some parameter or parameters to access priority classes in order to influence the likelihood of a remote terminal completing a successful access request to a base station.

    METHOD FOR ESTABLISHMENT OF THE POWER LEVEL FOR UPLINK DATA TRANSMISSION IN A MULTIPLE ACCESS SYSTEM FOR COMMUNICATIONS NETWORKS
    88.
    发明专利
    METHOD FOR ESTABLISHMENT OF THE POWER LEVEL FOR UPLINK DATA TRANSMISSION IN A MULTIPLE ACCESS SYSTEM FOR COMMUNICATIONS NETWORKS 未知

    公开(公告)号：CA2249868A1

    公开(公告)日：1999-04-14

    申请号：CA2249868

    申请日：1998-10-08

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： CHUAH MOOI CHOO

    IPC: H04J4/00 ,  H04B7/005 ,  H04B7/26 ,  H04L12/26 ,  H04L12/28 ,  H04L12/56 ,  H04W36/16 ,  H04W52/10 ,  H04W52/50 ,  H04W88/08 ,  H04W92/10 ,  H04Q7/36 ,  H04L29/06

    Abstract: The power level for uplink data transmission in a wireless communications network utilizing an on-demand multiple access method with a fair queuing servic e discipline (ODMAFQ) for efficient utilization of the limited bandwidth available in the wireless network is established during the initial access request message. T he power level in a wireless network having a base station and several remote hosts is established by first transmitting a short connection request message to the base station from one of the remote hosts at an initial power level that is set relative to t he nominal open loop power level. If the first remote host's transmission is unsuccessful, the power level is incremented by a power increment amount that ma y be predetermined, and the steps of transmitting and incrementing are repeated un til the transmission from remote host to base station is successful. Finally, the po wer level at which transmission is successful is stored and used for further data transmission between that particular remote host and the wireless network base station.

    90.
    发明专利
    未知

    公开(公告)号：DE69838775D1

    公开(公告)日：2008-01-10

    申请号：DE69838775

    申请日：1998-10-13

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： CHUAH MOOI CHOO

    IPC: H04J1/00 ,  H04L12/28 ,  H04B7/005 ,  H04J3/00 ,  H04J3/16 ,  H04L12/56 ,  H04L69/14 ,  H04W4/06 ,  H04W8/24 ,  H04W28/04 ,  H04W28/14 ,  H04W48/10 ,  H04W52/10 ,  H04W52/50 ,  H04W72/12 ,  H04W74/00 ,  H04W74/04 ,  H04W88/08

    Abstract: A method for data transmission in a wireless communication network utilizes an on-demand multiple access method with a fair queuing service discipline for efficient utilization of the limited bandwidth available in the network by sharing bandwidth among the remote hosts. In one embodiment, the base station broadcasts the system virtual time and the assigned shares of service classes to each of the wireless remotes. Each remote host computes its own service tag and reports it to the base station, which assigns transmit permits based on the service tag values and the available data slots. If a packet is lost or in error, the sending remote recomputes the service tag values of all its queued packets, including the packet whose transmission failed. Alternatively, the remote informs the base station of its queue size and the base station computes service tags for each remote based on the service shares of the remote and the available data slots. If a packet is lost or in error, the base station recomputes the service tag values for that remote host based on the current system virtual time. In an alternate embodiment, the AP or wireless node maintains a packet queue and a head-of-line tag. If a packet is lost, only the head-of-line tag needs to be changed. Once the head-of-line packet has been transmitted successfully, the rest of the queued packets will automatically receive the correct tag, the recomputed head-of-line tag plus appropriate increments. For half-duplex, both the uplink and downlink queues at the access points are managed as if there is only one system virtual time. For full-duplex, separate system virtual times for the uplink and the downlink traffic may be used. Remotes may also be divided into one or more separate groups, with each group having a different priority and receiving a different system virtual time. Service tags of all other remotes remain unaffected by the retransmission of a packet from any particular remote, meaning that the QoS experienced by the other remotes does not suffer.

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