Channel structure for communication systems

• US 6,526,030 B2
• Filed: 02/15/2000
• Issued: 02/25/2003
• Est. Priority Date: 09/16/1997
• Status: Expired due to Term

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Rezaiifar, Ramin, Tiedemann, Edward G. Jr., Jou, Yu-Cheun
• Primary Examiner(s): Ton, Dang
• Assistant Examiner(s): Nguyen, Brian
• Application Number:
  US09/504,242
• Publication Number:
  US 20030002464A1
• Time in Patent Office: 1,106 Days
• Field of Search: 370/335, 370/336, 370/337, 370/310, 370/329, 370/341, 370/342, 370/345, 370/346, 370/347, 370/441, 370/442, 370/320, 370/479, 455/455, 455/450, 455/522
• US Class Current: 370/335
• CPC Class Codes: H04B 7/18584 Arrangements for data networking, i.e. for data packet routing, for congestion control data switching networks H04L12/00
• CPC Class Codes: H04B 7/264 for data rate control
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04W 36/18 for allowing seamless reselection, e.g. soft reselection
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 52/0245 according to signal strength
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A channel structure for use in communication systems. Two sets of physical channels, one for the forward link and another for the reverse link, are utilized to facilitate communication of a variety of logical channels. The physical channels comprise data and control channels. In the exemplary embodiment, the data channels comprise fundamental channels which are used to transmit voice traffic, data traffic, high speed data, and other overhead information and supplemental channels which are used to transmit high speed data. The fundamental channels can be released when the remote stations are idle to more fully utilized the available capacity. The control channels are used to transmit paging and control messages and scheduling information.

Claims

1. A method for operating a remote station in a plurality of activity modes comprising:

operating said remote station in a traffic mode in which dedicated traffic channels are allocated to said remote station when said remote station is actively receiving and transmitting data;

storing, in the remote station, a Radio Link Protocol (RLP) state associated with an active data session of said traffic mode;

storing a traffic channel configuration associated with said traffic mode;

storing encryption variables associated with said traffic mode;

operating said remote station in a suspended mode wherein said dedicated traffic channels are de-allocated and said remote station monitors a paging channel in a non-slotted mode when a traffic mode time interval, in which said remote station operates in the traffic mode and neither transmits nor receives data, exceeds a first threshold interval;

operating said remote station in a dormant mode wherein said remote station monitors said paging channel in a slotted mode when a suspended mode time interval in which said remote station operates in the suspended mode and neither transmits nor receives data exceeds a second threshold interval; and

utilizing the stored RLP state, the stored traffic channel configuration, and the stored encryption variables for the transmission and reception of traffic after receiving a channel assignment message on said paging channel.

2. The method of claim 1 further comprising releasing said at least one traffic channel after the traffic mode time interval exceeds the first threshold period.

3. The method of claim 1 wherein said first threshold period is approximately one second.

4. The method of claim 1 wherein said second threshold period is approximately sixty seconds.

5. The method of claim 1 further comprising sending a location update message to a base station during said operating said remote station in a suspended mode.

6. The method of claim 1 further comprising storing authentication variables associated with said traffic mode in said remote station during said operating said remote station in a suspended mode.

7. The method of claim 1 further comprising:

storing state information in said remote station during said operating said remote station in a suspended mode; and

upon receiving, at said remote station, a channel assignment message, bringing said remote station back to said traffic mode using said state information.

8. The method of claim 7 wherein said state information comprises authentication variables.