公开(公告)号：AU3934600A

公开(公告)日：2000-12-14

申请号：AU3934600

申请日：2000-06-07

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KUMAR SARATH ,  NANDA SANJIV ,  RUBIN HARVEY ,  VITEBSKIY STANISLAV

IPC: H04B7/005 ,  H04B7/26 ,  H04W36/18 ,  H04W52/14 ,  H04W52/40 ,  H04W52/44 ,  H04W52/50 ,  H04Q7/28 ,  H04L5/16

Abstract: A back haul architecture enables efficient primary transfer (i.e., transfer of the designation of primary base station from one base station to another). A frame selection/distribution (FSD) function queues packets of forward-link data -- to which sequence numbers have been assigned --for packet-mode transmission over the back haul only to one base station -- the current primary base station -- where the packets are again queued for over-the-air transmission to the mobile unit. If and when it becomes appropriate to transfer the designation of primary base station to another base station, there may still be packets of data queued at the old primary base station awaiting transmission to the mobile unit. The old primary base station sends a message to the new primary base station indicating a particular sequence number that identifies the remaining packets of forward-link data queued at the old primary base station. The new primary base station then sends a message to the FSD function requesting transmission of those packets of forward-link data corresponding to the particular sequence number. The FSD function then transmits those requested packets of forward-link data to the new primary base station, which queues the requested packets for over-the-air transmission to the mobile unit. In this way, transmission of all of the forward-link data to the mobile unit is enabled without having to transmit the remaining queued packets of forward-link data from the old primary base station to the new primary base station over the back haul, thereby providing an efficient mechanism for primary transfer in wireless communications systems that support forward-link data transmissions only in simplex mode.

公开(公告)号：AU4104799A

公开(公告)日：2000-02-17

申请号：AU4104799

申请日：1999-07-22

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KUMAR SARATH ,  VITEBSKIY STANISLAV ,  NANDA SANJIV

IPC: H04B1/707 ,  H04L12/56 ,  H04W28/04 ,  H04W28/20 ,  H04W72/04 ,  H04W74/00 ,  H04W74/04 ,  H04W84/04 ,  H04Q7/22

Abstract: Bursts of additional bandwidth (e.g., one or more supplemental channels or a channel having variable bandwidth) is assigned to users (e.g., high-speed data users) in a cellular telecommunication system. A request for assignment of additional bandwidth may be an initial request, a continuation request for an on-going burst, or a retry requests after a previously rejected request. In any case, it is determined whether to grant or reject the request. If the request is rejected, instructions are given to submit a retry request after a specified back-off time. The present invention may be implemented using either an asynchronous approach or a synchronous approach. According to the asynchronous approach, all requests are handled asynchronously. According to the synchronous approach, initial requests are handled asynchronously, but continuation requests and retry requests are handled synchronously at epoch times that coincide with specific time slots.