Maintaining data communication through neighboring mobile units during handoff
First Claim
1. A method of maintaining packet data communication for a handoff mobile unit in wireless cellular networks when the handoff mobile unit enters a new cell which is already busy and unable to provide immediate connection for the handoff mobile unit comprising the step of initiating a creation of an ad hoc handoff cell by the handoff mobile unit paging slave mobile units in the vicinity of the handoff mobile unit, the handoff mobile unit becoming the master of the handoff cell when it is created.
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Accused Products
Abstract
A data communication for a handoff mobile unit is maintained by data forwarding through neighboring mobile units in indoor wireless cellular communication networks operates such that, when the master unit has no available channels, the mobile unit switches over to master status to create an ad hoc cell. The mobile unit then pages neighboring slave mobile units for data forwarding assistance. The mobile unit chooses one or more slave mobile units and establishes wireless links with the chosen slave mobile units. These chosen mobile units then have two masters; one the master unit of the cell and the other the handoff mobile unit which has created the ad hoc cell. A list of the slave mobile units in the ad hoc cell is sent to the network server, and data communication proceeds with data forwarding through the chosen mobile slave units. When a channel becomes available with the master unit for the cell, the handoff mobile unit becomes a slave mobile unit to the master unit and the ad hoc cell is dissolved.
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Citations
20 Claims
- 1. A method of maintaining packet data communication for a handoff mobile unit in wireless cellular networks when the handoff mobile unit enters a new cell which is already busy and unable to provide immediate connection for the handoff mobile unit comprising the step of initiating a creation of an ad hoc handoff cell by the handoff mobile unit paging slave mobile units in the vicinity of the handoff mobile unit, the handoff mobile unit becoming the master of the handoff cell when it is created.
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16. A system for maintaining packet data communication for a handoff mobile unit in wireless cellular networks when the handoff mobile unit enters a new cell which is already busy and unable to provide immediate connection for the handoff mobile unit comprising:
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a wireless cellular network including a plurality of base stations functioning as a master within a cell of the cellular network for a predetermined number of channels; and
a plurality of mobile units functioning as slave units to a respective one of said base stations within a cell of the cellular network, said mobile units being capable of moving between cells of the cellular network and, when entering a cell as a handoff mobile unit for which cell all channels are currently occupied, of initiating creation of an ad hoc handoff cell by the handoff mobile unit paging slave mobile units in the vicinity of the handoff mobile unit, the handoff mobile unit becoming the master of the handoff cell when it is created. - View Dependent Claims (17, 18, 19, 20)
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Specification