Virtual circuit management in cellular telecommunications
AssigneeLucent Technologies Inc.
InventorsJohn H. Baldwin, Helen Chu, Bharat T. Doshi, Subrahmanyam Dravida, Sanjiv Nanda, Philip A. Treventi
Life of this patent
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Abstract
A method and apparatus for managing a virtual circuit network is disclosed that enables hand-off management. An illustrative embodiment establishes a virtual ciruit by receiving, at a radio port, a virtual circuit identifier from a wireless terminal and attaching the virtual circuit identifier to an OA&M cell. The radio port then transmits, over a pre-established unidirectional virtual ciruit, the OA&M cell to a radio port manager.
Claims4
A method for establishing a downlink virtual circuit comprising:
- receiving, at a radio port, a virtual circuit identifier from a wireless terminal;
- attaching said virtual circuit identifier to an OA&M cell;
- sending a set-reverse-VC message in said OA&M cell;
- transmitting, from said radio port, said OA&M cell to a radio port manager over an uplink virtual circuit;
- receiving said OA&M cell by a switch in said uplink virtual circuit;
- reading said set-reverse-VC message;
- and
- in response to said set-reverse-VC message, establishing said downlink virtual circuit in said switch.
A method for establishing a downlink virtual circuit comprising:
- creating a plurality of virtual circuit identifiers, each of which is associated with the others;
- transmitting said plurality of virtual circuit identifiers to a wireless terminal via a first radio port;
- communicating with said wireless terminal via said first radio port with one of said plurality of virtual circuit identifiers;
- receiving, at a second radio port, another one of said plurality of virtual circuit identifiers from said wireless terminal;
- attaching said another one of said plurality of virtual circuit identifiers to an OA&M cell;
- sending a set-reverse-VC message in said OA&M cell;
- transmitting, from said second radio port, said OA&M cell to a radio port manager over a uplink virtual circuit;
- receiving said OA&M cell by a switch in said uplink virtual circuit;
- reading said set-reverse-VC message by said switch;
- and
- in response to said set-reverse-VC message, establishing said downlink virtual circuit in said switch.
Dependencies are inferred from the claim text.