User equipment for communicating using a selected code over a common packet channel

• US 6,845,093 B2
• Filed: 02/14/2002
• Issued: 01/18/2005
• Est. Priority Date: 05/19/1999
• Status: Expired due to Term

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Zeira, Eldad, Dick, Stephen G.
• Primary Examiner(s): Pham, Chi
• Assistant Examiner(s): JONES, PRENELL P
• Application Number:
  US10/075,410
• Publication Number:
  US 20020089954A1
• Time in Patent Office: 1,069 Days
• Field of Search: 370335-337, 370/320, 370342-349, 370/468, 370/522, 370/231, 375/130, 375/141, 375/150
• US Class Current: 370/342
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04B 2201/70701 featuring pilot assisted reception
• CPC Class Codes: H04J 13/0014 Golay
• CPC Class Codes: H04J 13/16 Code allocation
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/0466 the resource being a scrambling code
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A user equipment transmits a signature in a selected one of a plurality of time slots of a common packet channel. The common packet channel is defined by a predetermined set of codes and has a plurality of access opportunities. Each access opportunity is defined by a time slot of the plurality of time slots and a signature. An identifier of a selected code of the predetermined set of codes is identified. The selected code is selected from a currently unused code, if available, based on a code association with the access opportunity defined by the selected signature and selected one time slot. The user equipment communicates using the one selected code.

Claims

1. A user equipment comprising:

a transmitter for transmitting a selected preamble out of a set of preambles in a slot out of a plurality of slots divided by time of a common packet channel, the common packet channel using a predetermined set of codes; and

a receiver for receiving a combined collision signal and channel indicator, the channel indicator indicating a selected code out of the predetermined set of codes, the channel indicator being associated with the selected preamble, the combined collision signal and channel indicator distinguishes between codes using an inversion; and

wherein the user equipment communicates using the selected code.

2. A user equipment comprising:

means for transmitting a selected preamble out of a set of preambles in a slot out of a plurality of slots divided by time of a common packet channel, the common packet channel using a predetermined set of codes;

means for receiving a combined collision signal and channel indicator, the channel indicator indicating an a selected code out of the predetermined set of codes, the channel indicator being associated with the selected preamble, the combined collision signal and channel indicator distinguishes between codes using an inversion; and

means for communicating using the selected code.