Method and system for soft handoff in mobile broadband systems
AssigneeNortel Networks Limited
InventorsNimal SENARATH, Bill GAGE, Shalini PERIYALWAR, Wen TONG
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Abstract
The present invention provides a method and system for facilitating efficient handoff and data throughput in mobile broadband communication systems. Methods implemented by a system constructed in accordance with the principles of the present invention include selectively enabled soft handoff, performing Layer 2 bearer functions at the base station and using the mobile device to coordinate soft handoff and interference avoidance without the need for a centralized coordination function.
Claims9
A processing method for communication from a mobile device in a first network to a destination device in a second network using soft handoff in a mobile broadband system, the method comprising:
- a) determining an active set of base station transceiver systems;
- b) determining resource reservation at the macrodiversity support function for the base station transceiver systems in the active set of base station transceiver systems for communication of a high level data communication packet;
- c) transmitting radio link protocol packets comprising the full high level data communication packet to the base station transceivers in the active set based on the determined resource reservations;
- d) forwarding the full high level data communication packet to a macrodiversity support function;
- and
- e) repeating steps (a) through (d) for all high level data communication packets to be transmitted.
A data packet processing method for communication to a mobile device in a first network from a destination device in a second network using soft handoff in a mobile broadband system, the method comprising:
- determining an active set of base station transceiver systems;
- segmenting each of the data packets to be transmitted to the mobile device into radio link protocol packets based on a predetermined segmentation algorithm;
- determining a synchronized transmission resource reservation for the radio link protocol packets and providing the resource reservation to all base station transceiver systems in the active set;
- transmitting the data packet to each of the base station transceiver systems in the active set;
- and
- transmitting each of the radio link protocol packets to the mobile device based on the transmission schedule using soft handoff.
A mobile broadband system using soft handoff, the system comprising:
- a plurality of base station transceiver systems;
- a macrodiversity support function in data communication with the plurality of base station transceiver systems, the macrodiversity support function determining resource reservation for the base station transceiver systems in the active set of base station transceiver systems for communication of a high level data communication packet;
- a mobile device arranged to engage in wireless communications with plurality of base station transceiver systems, the mobile device:
- determining an active set of base station transceiver systems;
- and
- transmitting radio link protocol packets comprising the full high level data communication packet to the base station transceivers in the active set based on the determined resource reservations, wherein the base station transceiver systems forward the full high level data communication packet to the macrodiversity support function.
A mobile broadband system using soft handoff to facilitate transmission of a plurality of data packets, the system comprising:
- a plurality of base station transceiver systems;
- a mobile device arranged to engage in wireless communications with the plurality of base station transceiver systems, the mobile device:
- determining an active set of base station transceiver systems;
- and
- a macrodiversity support function in data communication with the plurality of base station transceiver systems, the macrodiversity support function:
- determining a synchronized transmission resource reservation for radio link protocol packets comprising the data packet and providing the resource reservation to all base station transceiver systems in the active set;
- and
- transmitting the data packet to each of the base station transceiver systems in the active set, wherein the base station transceiver systems in the active set segment the data packet into the radio link protocol packets based on a predetermined segmentation algorithm and transmit each of the radio link protocol packets to the mobile device based on the transmission schedule using soft handoff.
Dependencies are inferred from the claim text.