Methods and apparatus for operating mobile nodes in multiple states

Abstract

The present invention provides a method and a device for operating mobile node in multiple states. The use of multiple states of mobile communication device (14) operation to allow a single base station (12) to support a relatively large number of mobile nodes (14, 16) is described. The various states require different amounts of communications resources, e.g., bandwidth. Four supported states ofoperation are an on-state (404), a hold-state (410), a sleep-state (408), and an access-state (402). Each mobile node in the on-state (404) is allocated communication resources to perform transmission power control signaling, transmission timing control signaling and to transmit data as part of a data uplink communications operation. Each mobile node in the hold-state (410) is allocated communication resources to perform transmission timing control signaling and is provided a dedicated uplink for requesting a state transition and a shared resource for transmitting acknowledgements. In the sleep state (408) a mobile node is allocated minimal resources and does not conduct power control signaling or timing control signaling.

Description

[0001] related application [0002] This application claims U.S. Patent Application Serial No. 10 / 324,194, filed December 20, 2002, entitled "Methods and Apparatus for Operating Mobile Nodes in Multiple States," and filed August 8, 2002, entitled "Methods and Apparatus for Implementing Mobile Communications System” which is specifically incorporated herein by reference. technical field [0003] The present invention relates to wireless communication systems, and more particularly to methods and devices for supporting multiple mobile nodes in a resource-limited communication cell. Background technique [0004] A wireless communication system is often implemented as one or more communication cells. Each cell typically includes a base station that supports communications with mobile nodes that are within or come within communication range of the cell's base station. Within a cell or within a sector within a cell, the unit of communication resource is a symbol, for example, in...

AI Technical Summary

Problems solved by technology

[0012] Dedicated resources that are not being used are very wasteful

However, shared uplink resources that can be accessed by multiple users at the same time are likely to suffer from a large number of collisions, resulting in wasted bandwidth and unpredictable communication needs

[0013] Although timing and power control signals and downlink channel quality reports are very useful in the process of managing communications in a wireless communication system, due to limited resources, there is a need to continuously provide power control and other When the type signaling is supported, the base station cannot support a large number of nodes

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