Base station for communicating using a selected code over a common packet channel

• US 20050169225A1
• Filed: 01/03/2005
• Published: 08/04/2005
• Est. Priority Date: 05/19/1999
• Status: Active Grant

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Zeira, Eldad, Dick, Stephen G.
• Granted Patent: US 7,382,753 B2
• Time in Patent Office: Days
• 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 base station receives 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 uses a predetermined set of codes. A combined collision signal and channel indicator is transmitted. The channel indicator indicates a selected code out of the predetermined set of codes. The channel indicator is associated with the selected preamble. The combined collision signal and channel indicator distinguishes between codes using an inversion. The base station communicates using the selected code.

Claims

1. A base station comprising:

a receiver for receiving 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 transmitter for transmitting 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 base station comprising:

means for receiving 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 transmitting 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

means for communicating using the selected code.