Random access channel congestion control for broadcast teleservice acknowledgement messages
First Claim
1. A method for controlling transmissions on a set of reverse direction control sub-channels which are random access channels, in a wireless communication system, comprising the steps of:
- receiving a first message at a mobile-telephone on a forward direction control channel indicating a reverse direction control sub-channel allocation specify at least one dedicated reverse direction control sub-channel that may be used by said mobile-telephone; and
transmitting a second message from the mobile-telephone using one of the at least one reverse direction control sub-channel specified in the first message, wherein the first message includes a broadcast short message and the second message is transmitted in response to the first message after a delay period calculated at the mobile telephone in response to the first message.
2 Assignments
0 Petitions
Accused Products
Abstract
One embodiment of the present invention is a method for controlling the number of mobile-telephones transmitting acknowledgments to broadcast short messages (BSM) over a same set of random access channels at a same time. In this embodiment, the transmissions of BSM acknowledgments is controlled by the wireless communication system using random access channel restrictions and random access techniques. Specifically, the random access channel restrictions reduce collisions among acknowledging mobile-telephones and call processing mobile-telephones by allocating one or more specific random access channels over which a BSM acknowledgment can be transmitted, and the random access techniques reduce collisions among acknowledging mobile-telephones by distributing transmissions of the BSM acknowledgments over a period of time.
-
Citations
13 Claims
-
1. A method for controlling transmissions on a set of reverse direction control sub-channels which are random access channels, in a wireless communication system, comprising the steps of:
-
receiving a first message at a mobile-telephone on a forward direction control channel indicating a reverse direction control sub-channel allocation specify at least one dedicated reverse direction control sub-channel that may be used by said mobile-telephone; and
transmitting a second message from the mobile-telephone using one of the at least one reverse direction control sub-channel specified in the first message, wherein the first message includes a broadcast short message and the second message is transmitted in response to the first message after a delay period calculated at the mobile telephone in response to the first message. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method for controlling transmissions on a set of reverse direction control sub-channels which are random access channels in a wireless communication system comprising the steps of:
-
receiving a bit map at a mobile-telephone on a forward direction control channel indicating a reverse direction control sub-channel allocation; and
transmitting a message from the mobile-telephone using the allocated reverse direction control sub-channel indicated in the bit map, wherein the bit map includes six bit values for indicating whether a corresponding random access channel is allocated for transmission of the message by the mobile-telephone. - View Dependent Claims (9)
-
-
10. A method for controlling transmissions on a set of reverse direction control sub-channels which are random access channels in a wireless communication system comprising the steps of:
-
transmitting from a wireless communication system a first message on a forward direction control channel and a time delay parameter; and
receiving at the wireless communication system on a reverse direction control channel a second message in response to the first message after completion of a period defined using the time delay parameter. - View Dependent Claims (11, 12, 13)
transmitting a third message indicating a channel allocation.
-
-
13. The method of claim 12, wherein the second message is received over the allocated channel.
Specification