Apparatus and method for reducing message collision between...

Details Apparatus and method for reducing message collision between... Apparatus and method for reducing message collision between...

2006-01-10

2006-01-10

Vuong, Quochien B. (Department: 2685)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S450000, C375S145000, C370S515000

Reexamination Certificate

active

06985728

ABSTRACT:
Collisions between messages simultaneously transmitted by multiple spread-spectrum transmitters are reduced by distributing the transmissions over the available resources of the receiver. Each mobile station in a CDMA system uses one or more randomization methods to distribute its transmissions. In the first randomization, the mobile station time-delays its transmissions by a number of chips of the PN code with which it spreads the transmitted signal. In a second randomization, the mobile station randomly selects the PN code. In a third randomization, the mobile station inserts a random delay between successive message transmissions or probes if it does not receive an acknowledgement after a predetermined timeout period. A predetermined number of such transmissions is called a probe sequence. In a fourth randomization, the mobile station inserts a relatively long random delay between successive probe sequences if it does not receive an acknowledgement of any probe in the sequence.

REFERENCES:
patent: 5243530 (1993-09-01), Stanifer et al.
patent: 6535736 (2003-03-01), Balogh et al.

Affiliated with

Also associated with

Rating

Apparatus and method for reducing message collision between... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and method for reducing message collision between..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for reducing message collision between... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3549866