Voice data integrated multiaccess by self-reservation and contention algorithm

• US 8,320,355 B1
• Filed: 10/23/2007
• Issued: 11/27/2012
• Est. Priority Date: 10/07/1998
• Status: Expired due to Fees

• Current Assignee: AT&T Intellectual Property II LP (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property II LP (AT&T, Inc.)
• Inventors: Ho, Jin-Meng
• Primary Examiner(s): CHAN, SAI MING
• Application Number:
  US11/877,097
• Time in Patent Office: 1,862 Days
• Field of Search: 370/345, 370/282, 370/328, 370/336, 370/443, 370/447, 370/348, 370/435, 370/445, 370/493
• US Class Current: 370/345
• CPC Class Codes: H04W 28/26 Resource reservation
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/27 between access points

Abstract

Certain exemplary embodiments provide a method for providing multiple access to a communication channel, the method comprising: sending a reservation request of a first type into a first selected minislot of a selected frame of an uplink channel when information of a first type is to be sent, the uplink channel having a plurality of frames, each frame having a first selectable number of minislots and a second selectable number of slots, the reservation request of the first type requesting an assignment of at least one slot for transmitting information of the first type in at least one frame that is subsequent to the selected frame.

Claims

1. A method comprising:

broadcasting a feedback message in a downlink channel before an end of a selected frame of an uplink channel, the feedback message comprising information indicative of data devices that successfully sent a data reservation request by contention, minislot and slot assignment information of voice devices in a frame immediately subsequent to the selected frame, minislot and slot assignment information of data devices in the frame immediately subsequent to the selected frame, information responsive to the data reservation request, and a permission probability, the data devices adapted to utilize information comprised in the feedback message in making data reservation requests in frames subsequent to the selected frame, the feedback message responsive to a first slot being assigned responsive to a voice reservation request in the selected frame, the uplink channel comprising a plurality of frames, each frame comprising a first selectable count of minislots and a second selectable count of slots, the voice reservation request contained in a first selected minislot of the selected frame of the uplink channel when a voice transmission is ready to be sent, the voice reservation request adapted to cause an assignment of the first slot to the voice transmission in a frame that is subsequent to the selected frame, the data reservation request that is received contained in a second selected minislot of the selected frame when the second selected minislot is available in the selected frame and when data is ready to be sent, the data reservation request adapted to cause an assignment of a slot to transmit data in another frame that is subsequent to the selected frame, the data reservation request adapted to contend with other data reservation requests for the second selected minislot based on a contention algorithm, wherein the feedback message is adapted to change a frame assignment initially used to transmit background noise of the voice transmission responsive to a determination to use a silence compression during a speech silence in the voice transmission, wherein the speech silence is automatically detected via a voice activity detector.

2. The method according to claim 1, wherein the contention algorithm is a blocked-access binary tree algorithm.

3. The method according to claim 1, wherein the contention algorithm is a pseudo-bayesian controlled aloha algorithm.

4. The method according to claim 1, further comprising:

injecting a comfort noise into a synthesized speech of the voice transmission at a listener receiver.

5. The method according to claim 1, wherein the second selected minislot of the selected frame is chosen at random from a plurality of available minislots of the selected frame allocated for data reservation.

6. The method according to claim 1, wherein a count of available minislots of a next frame is dynamically determined by a central station and communicated in the feedback message.

7. A method comprising:

broadcasting a feedback message in a downlink channel before an end of a selected frame of an uplink channel, the feedback message comprising information indicative of data devices that successfully sent a data reservation request by contention, minislot and slot assignment information of voice devices in a frame immediately subsequent to the selected frame, minislot and slot assignment information of data devices in the frame immediately subsequent to the selected frame, information responsive to the data reservation request, and a permission probability, the data devices adapted to utilize information comprised in the feedback message in making data reservation requests in frames subsequent to the selected frame, the feedback message responsive to a first slot being assigned responsive to a voice reservation request in the selected frame, the uplink channel comprising a plurality of frames, each frame comprising a first selectable count of minislots and a second selectable count of slots, the voice reservation request contained in a first selected minislot of the selected frame of the uplink channel when a voice transmission is ready to be sent, the voice reservation request adapted to cause an assignment of the first slot to the voice transmission in a frame that is subsequent to the selected frame, the data reservation request that is received contained in a second selected minislot of the selected frame when the second selected minislot is available in the selected frame and when data is ready to be sent, the data reservation request adapted to cause an assignment of a slot to transmit data in another frame that is subsequent to the selected frame, the data reservation request adapted to contend with other data reservation requests for the second selected minislot based on a contention algorithm; and

re-allocating a slot initially used to transmit background noise in the frame subsequent to the selected frame responsive to an automatic detection that a silence interval has ended.

8. The method according to claim 7, wherein the contention algorithm is a blocked-access binary tree algorithm.

9. The method according to claim 7, wherein the contention algorithm is a pseudo-bayesian controlled aloha algorithm.

10. The method according to claim 7, further comprising:

injecting a comfort noise into a synthesized speech of the voice transmission at a listener receiver.

11. The method according to claim 7, wherein the second selected minislot of the selected frame is chosen at random from a plurality of available minislots of the selected frame allocated for data reservation.

12. The method according to claim 7, wherein a count of available minislots of a next frame is dynamically determined by a central station and communicated in the feedback message.

13. A method comprising:

broadcasting a feedback message in a downlink channel before an end of a selected frame of an uplink channel, the feedback message comprising information indicative of data devices that successfully sent a data reservation request by contention, minislot and slot assignment information of voice devices in a frame immediately subsequent to the selected frame, minislot and slot assignment information of data devices in the frame immediately subsequent to the selected frame, information responsive to the data reservation request, and a permission probability, the data devices adapted to utilize information comprised in the feedback message in making data reservation requests in frames subsequent to the selected frame, the feedback message responsive to a first slot being assigned responsive to a voice reservation request in the selected frame, the uplink channel comprising a plurality of frames, each frame comprising a first selectable count of minislots and a second selectable count of slots, the voice reservation request contained in a first selected minislot of the selected frame of the uplink channel when a voice transmission is ready to be sent, the voice reservation request adapted to cause an assignment of the first slot to the voice transmission in a frame that is subsequent to the selected frame, the data reservation request that is received contained in a second selected minislot of the selected frame when the second selected minislot is available in the selected frame and when data is ready to be sent, the data reservation request adapted to cause an assignment of a slot to transmit data in another frame that is subsequent to the selected frame, the data reservation request adapted to contend with other data reservation requests for the second selected minislot based on a contention algorithm; and

making bandwidth resources initially used to transmit background noise available to data sources, the bandwidth resources being freed responsive to a silence compression of the voice transmission.

14. The method according to claim 13, wherein the contention algorithm is a blocked-access binary tree algorithm.

15. The method according to claim 13, wherein the contention algorithm is a pseudo-bayesian controlled aloha algorithm.

16. The method according to claim 13, further comprising:

injecting a comfort noise into a synthesized speech of the voice transmission at a listener receiver.

17. The method according to claim 13, wherein the second selected minislot of the selected frame is chosen at random from a plurality of available minislots of the selected frame allocated for data reservation.

18. The method according to claim 13, wherein a count of available minislots of a next frame is dynamically determined by a central station and communicated in the feedback message.