公开(公告)号：DE60117476T2

公开(公告)日：2006-08-31

申请号：DE60117476

申请日：2001-04-23

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CHEN XIAOBAO X ,  CHUAH MOOI CHOO

IPC: H04L12/28 ,  H04L12/56 ,  H04L29/06 ,  H04Q7/20 ,  H04Q7/38

Abstract: Two-way resource reservation techniques for use in UMTS and other telecommunication systems. A determination is made as to whether a user requires resource reservations in both an uplink direction and a downlink direction within the system, and if the user requires such two-way resource reservations, a two-way protocol is implemented to establish the required resource reservations. The two-way protocol integrates resource negotiation procedures for both the uplink direction and the downlink direction so as to ensure that the required resource reservations are provided for both directions. The two-way protocol may be a Packet Data Protocol (PDP) based on a Resource Reservation Protocol (RSVP) resource negotiation procedure. The determination may be based on one or more flag bits which identify whether the user requires resource reservations for both the uplink and downlink directions. The flag bits may be associated with a Quality of Service (QoS) Information Element (IE) of the system, and may be used to permit the user to select between application of the two-way protocol and application of a one-way protocol.

公开(公告)号：DE60019206T2

公开(公告)日：2006-03-09

申请号：DE60019206

申请日：2000-06-27

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CHUAH MOOI CHOO

IPC: H04L1/18 ,  H04L12/46 ,  H04L12/56 ,  H04L69/40

Abstract: A Layer 2 Tunneling Protocol (L2TP) receiver performs a receiver initiated recovery algorithm (RIRA) when the number of lost or out-of-order payload packets exceed a predetermined value. In particular, the receiver maintains a number of variables: the "next sequence number expected to be received" (Sr) value, and Snl, which stores the value of the currently received "next sent" (Ns) sequence number from the latest received packet. When the value of Snl > Sr + adjustment, the receiver portion resets the value of Sr to the value of Snl and passes all packets to the upper layer of the protocol stack. The value of the adjustment variable represents the number of packets that may be dropped or out-of-order at the receiver before the receiver initiates recovery. The receiver also sends (either via piggybacking or a zero-length message) an ACK packet to inform the sender of the new Sr value at the receiver.

公开(公告)号：DE60109269T2

公开(公告)日：2006-02-09

申请号：DE60109269

申请日：2001-08-07

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CHUAH MOOI CHOO

IPC: H04M3/00 ,  H04B7/26 ,  H04L12/28 ,  H04L12/56 ,  H04M11/00 ,  H04W28/24 ,  H04W92/02 ,  H04W92/06 ,  H04W92/24

Abstract: A UMTS (Universal Mobile Telecommunications System) core network supports the negotiation of variable quality of service (QoS). A QoS information element (IE) is defined that supports downgradeable QoS requirements by allowing multiple traffic classes to be specified in a priority order. Similarly, a QoS information element (IE) is defined that supports upgradeable QoS requirements.

公开(公告)号：DE60019206D1

公开(公告)日：2005-05-12

申请号：DE60019206

申请日：2000-06-27

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CHUAH MOOI CHOO

IPC: H04L1/18 ,  H04L12/46 ,  H04L12/56 ,  H04L69/40 ,  H04L29/06 ,  H04L29/14 ,  H04L29/08

Abstract: A Layer 2 Tunneling Protocol (L2TP) receiver performs a receiver initiated recovery algorithm (RIRA) when the number of lost or out-of-order payload packets exceed a predetermined value. In particular, the receiver maintains a number of variables: the "next sequence number expected to be received" (Sr) value, and Snl, which stores the value of the currently received "next sent" (Ns) sequence number from the latest received packet. When the value of Snl > Sr + adjustment, the receiver portion resets the value of Sr to the value of Snl and passes all packets to the upper layer of the protocol stack. The value of the adjustment variable represents the number of packets that may be dropped or out-of-order at the receiver before the receiver initiates recovery. The receiver also sends (either via piggybacking or a zero-length message) an ACK packet to inform the sender of the new Sr value at the receiver.

公开(公告)号：DE60017622D1

公开(公告)日：2005-03-03

申请号：DE60017622

申请日：2000-02-15

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CHUAH MOOI CHOO ,  KODIALAM MURALIDHARAN SAMPATH ,  YAN ANLU

IPC: H04L29/06 ,  H04L12/22 ,  H04L12/46 ,  H04L12/56

Abstract: A new RSVP-based tunnel protocol establishes packet tunnels between a tunnel source point (TSP) and a tunnel destination point (TDP) such that guaranteed services to aggregated packet flows is provided. In particular, an end-to-end RSVP session is mapped using a receiver-oriented RSVP type of signaling such that the TDP determines tunnel mapping. As such, this new RSVP-type of protocol is compatible with the receiver-driven nature of RSVP. Subsequent to admitting RSVP sessions, a tunnel tuning procedure dynamically adapts existing RSVP tunnels to traffic conditions in order to improve bandwidth efficiency. This tunnel tuning procedure may result in RSVP tunnel re-assignment of some of the admitted end-to-end sessions.

公开(公告)号：CA2329457C

公开(公告)日：2004-07-20

申请号：CA2329457

申请日：2000-12-21

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CHUAH MOOI CHOO

IPC: H04L12/28 ,  H04L12/56 ,  H04L29/06 ,  H04L29/08

Abstract: A UMTS (Universal Mobile Telecommunications System) core network suppor ts a compression framework that provides for header compression of General Pack et Radio Service Tunneling Protocol (GTP)-Encapsulated Packets. In particular, t he GTP/UDP(User Datagram Protocol)/IP(Internet Protocol) header is compressed. In addition, the UMTS core network also supports RTP(Real Time Protocol)/UDP/IP header compression independent of the GTP/UDP/IP header compression.

公开(公告)号：CA2300758C

公开(公告)日：2004-06-29

申请号：CA2300758

申请日：2000-03-16

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CHUAH MOOI CHOO

IPC: H04L29/08 ,  H04L12/28 ,  H04L12/46 ,  H04L12/56 ,  H04L29/06

Abstract: New Attribute Value Pairs (AVP)s are defined for use in the L2TP contro l messages for setting up a call. In particular, an L2TP Incoming-Call-Request (ICRQ) or Outgoing-Call-Request (OCRQ) message includes a QoS_Request AVP, which includes a field for defining the number of classes of service within the call. In another embodiment, a new QoS_Request extension and a new QoS_Reply extension are defined for us e in Mobile IP networks.

公开(公告)号：DE60003518T2

公开(公告)日：2004-04-22

申请号：DE60003518

申请日：2000-08-29

Applicant: LUCENT TECHNOLOGIES INC

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

IPC: H04L47/22 ,  H04L12/56

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 example, 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 than the available downlink/uplink bandwidth.

公开(公告)号：DE60101531D1

公开(公告)日：2004-01-29

申请号：DE60101531

申请日：2001-04-02

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ABRAHAM SANTOSH P ,  CHUAH MOOI CHOO ,  MEDAPALLI KAMESWARA RAO ,  SAMPATH ASHWIN

IPC: H04B7/26 ,  H04L12/28 ,  H04L12/56 ,  H04L29/06 ,  H04L29/08 ,  H04W28/18 ,  H04W28/24 ,  H04W84/04 ,  H04W92/12 ,  H04W99/00

公开(公告)号：CA2249865C

公开(公告)日：2002-08-06

申请号：CA2249865

申请日：1998-10-08

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CHUAH MOOI CHOO

IPC: H04J1/00 ,  H04B7/005 ,  H04J3/00 ,  H04J3/16 ,  H04L12/28 ,  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 ,  H04Q7/36

Abstract: A method for data transmission in a wireless communication network utilizes an on-demand multiple access method with a fair queuing service discipline f or efficient utilization of the limited bandwidth available in the network by s haring bandwidth among the remote hosts. In one embodiment, the base station broadc aststhe system virtual time and the assigned shares of s ervice classes to each of the wireless a Each remote host computes its own service tag and reports it to t he 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 re computes the service tag values of all its queued packets, including the packet whose tra nsmission 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 shar es of the remote and the available data slots. If a packet is lost or in error, the ba se station recomputes the service tag values for that remote host based on the current system virtual time. In an alternate embodiment, the a 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 recompute d head-of-line tag plus appropriate increments. For half-duplex, both the uplink and downli nk queues at the access points are managed as if there is only one system virtu al time. For full-duplex, separate system virtual times for the uplink and the downli nk traffic may be used. Remotes may also be divided into one or more separate groups, w ith each group having a different priority and receiving a different system virt ual 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 re motes does not suffer.