EP0594342A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Prioritizing a multiple access channel in a wireless telephone system
Assignee: AT&T Inc
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Filing: 1993-10-13
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Granted: —
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Expires: 2013-10-13
Abstract
Abstract Base stations (102,103,104) respond on a shared channel to a registration request message received on another shared channel from a wireless mobile unit (105), with the base station (103) to which the mobile unit is assigned transmitting in a first time slot and the other base stations transmitting in a time slot determined by the strength of the received signal from the mobile unit. If two base stations (102,104) respond to the registration request message in the same (collided) time slot and the assigned base station (103) does not respond, the mobile unit (105) determines whether there is a response in a time slot which is earlier in time than the collided time slot. If the collided time slot is earlier in time than any other time slot in which a response is received, the mobile unit transmits a second registration request message specifying the collided time slot. Each of the base stations (102,104) that had responded in the collided time slot responds by sending a base reply message in a random time slot, and the other base stations do not respond to this second registration request message. The mobile unit selects one of the base reply messages in a random time slot.
Inventors
- 👤 Charles Yeomans Farwell
- 👤 Richard Dale Miller
- 👤 Richard Alan Windhausen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 13:57
CPC Classifications
H; H04; H04W; H04W74/00; H04W74/08; H04W74/0833; H04W74/0841; H04B; H04B7/00; H04B7/24; H04B7/26; H04B7/2643; H04B7/2656; H04W88/00; H04W88/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
99 words
A wireless base station for operation in a wireless system, the wireless base station being interconnected to a switching system for establishment of communication links and the wireless system including a plurality of wireless mobile units for establishing communication with the wireless base station, the wireless base station comprises: means for receiving a first service request message from one of the wireless mobile units; and means for transmitting a first base reply message in a predefined time slot of a frame of time slots upon the one of the wireless mobile units being assigned to the wireless base station.
Claim 2
Dependent Claim
99 words
A wireless base station for operation in a wireless system, the wireless base station being interconnected to a switching system for establishment of communication links and the wireless system including a plurality of wireless mobile units for establishing communication with the wireless base station, the wireless base station comprises: means for receiving a first service request message from one of the wireless mobile units; and means for transmitting a first base reply message in a predefined time slot of a frame of time slots upon the one of the wireless mobile units being assigned to the wireless base station.
Claim 3
Dependent Claim
65 words
The wireless base station of claim 1 wherein the transmitting means comprises means for determining a time slot on the basis of the received signal strength of the one of wireless mobile units; and the transmitting means further transmitting the first base reply message in the determined time slot upon the one of the wireless mobile units not being assigned to the wireless base station.
Claim 4
Dependent Claim
72 words
The wireless base station of claim 2 wherein the receiving means further receiving a second service request message from the one of the wireless mobile units indicating a collision during the transmission of the first base reply message; the determining means further responsive to the indication of a collision for randomly determining a time slot; and the transmitting means further transmitting a second base reply message in the randomly determined time slot.
Claim 5
Dependent Claim
51 words
The wireless base station of claim 3 wherein the collision indication specifies the time slot in which the collision occurred and the determining means only determines the randomly determined time slot upon the specified time slot being identical to the time slot in which the first base reply message was transmitted.
Claim 6
Independent Claim
102 words
A method for controlling the operation of a wireless base station in a wireless system, the wireless base station being interconnected to a switching system for establishment of communication links and the wireless telephone system including a plurality of wireless mobile units for establishing communication with the wireless base station, the method comprises the steps of: receiving a first service request message from one of the wireless mobile units; and transmitting a first base reply message in a predefined time slot of a frame of time slots upon the one of the wireless mobile units being assigned to the wireless base station.
Claim 7
Independent Claim
102 words
A method for controlling the operation of a wireless base station in a wireless system, the wireless base station being interconnected to a switching system for establishment of communication links and the wireless telephone system including a plurality of wireless mobile units for establishing communication with the wireless base station, the method comprises the steps of: receiving a first service request message from one of the wireless mobile units; and transmitting a first base reply message in a predefined time slot of a frame of time slots upon the one of the wireless mobile units being assigned to the wireless base station.
Claim 8
Dependent Claim
64 words
The method of claim 5 wherein the transmitting step comprises the step of determining a time slot on the basis of the received signal strength of the one of wireless mobile units; and the transmitting step further transmitting the first base reply message in the determined time slot upon the one of the wireless mobile units not being assigned to the wireless base station.
Claim 9
Dependent Claim
70 words
The method of claim 6 wherein the receiving step further receiving a second service request message from the one of the wireless mobile units indicating a collision during the transmission of the first base reply message; the determining step further responsive to the indication of a collision for randomly determining a time slot; and the transmitting step further transmitting a second base reply message in the randomly determined time slot.
Claim 10
Dependent Claim
49 words
The method of claim 7 wherein the collision indication specifies the time slot in which the collision occurred and the determining step only determines the randomly determined time slot upon the specified time slot being identical to the time slot in which the first base reply message was transmitted.
References Cited (Backward Citations)
No citation records indexed.
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