Method and system for transmitting background noise data

• US 5,754,537 A
• Filed: 03/08/1996
• Issued: 05/19/1998
• Est. Priority Date: 03/08/1996
• Status: Expired due to Fees

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Jamal, Karim
• Primary Examiner(s): HSU, ALPUS
• Application Number:
  US08/613,216
• Time in Patent Office: 802 Days
• Field of Search: 370/330, 370/336, 370/337, 370/343, 370/345, 370/347, 370/348, 370/349, 370/389, 370/400, 370/401, 370/410, 370/442, 370/443, 370/444, 370/445, 370/447, 370/461, 370/462, 370/522, 370/528, 370/332, 395/2.09, 395/2.1, 395/2.23, 395/2.35, 395/2.36, 455/501, 455/507, 455/509, 455/512, 455/517, 455/524, 455/67.1, 455/67.3
• US Class Current: 370/330
• CPC Class Codes: H04J 3/17 in which the transmission channel allotted to a first user may be taken away and re-allotted to a second user if the first user becomes inactive, e.g. TASI speech analysis or identification G10L
• CPC Class Codes: H04W 28/26 Resource reservation
• CPC Class Codes: H04W 72/56 based on priority criteria
• CPC Class Codes: H04W 74/00 Wireless channel access
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02

Abstract

A method and system for transmitting background noise information on a packet reservation multiple access radio channel. In the method and system, relative priorities are assigned to background noise data transmissions and speech data, or other data traffic, transmissions. The priorities are assigned so that the effect of background noise data transmissions on the delays and quality of speech data, or other data traffic, transmissions within the system is reduced.

Claims

1. A method of allocating time slots for selective transmission of informational data and background noise data between a selected sending station and a selected receiving station in a TDMA communication system in which data is transmitted in bursts during a selected number of time slots defined upon at least one carrier between pairs of sending and receiving stations, groups of successive time slots forming frames, the background noise data and the information data together combinable at the receiving station, said method comprising the steps of:

detecting indications of access requests which request allocation of time slots for the communication of, alternatively, the informational data and background noise data, between selected pairs of the sending and receiving stations;

prioritizing the access requests for the allocation of the time slots responsive at least to which of the background noise data and the informational data the access request is requesting; and

allocating available time slots to selected ones of the pairs of the sending and receiving stations.

2. The method of claim 1 wherein the access requests, of which indications thereof are detected during said step of detecting each, includes a data field identifying the access request to be for the communication of informational data.

3. The method of claim 1 wherein the access requests, of which indications thereof are detected during said step of detecting each, includes a data field identifying the access request to be for the communication of background noise data.

4. The method of claim 1 wherein said step of prioritizing comprises:

includes prioritizing access requests for the allocation of the time slots for the communication of informational data with a higher priority level than access requests for the allocation of the time slots for the communication of background noise data.

5. The method of claim 4 further comprising the step of storing a queue containing access requests, of which indications thereof are detected during said step of detecting, the access requests.

6. The method of claim 1 comprising the additional step of:

determining signal quality levels on each of the at least one carrier;

and, wherein said step of allocating is further responsive to the signal quality levels.

7. In a TDMA communication system in which data is transmitted in bursts during a selected number of time slots defined upon at least one carrier between pairs of sending and receiving stations, groups of successive time slots forming frames, an improvement of apparatus for allocating time slots for selective transmission of informational data and background noise data between a selected sending and a selected receiving station, the background noise data and the information data together combinable at the selected receiving station to form a receive signal, said apparatus comprising:

an access request receiver and prioritizer coupled to receive indications of access requests which request allocation of time slots for the communication of, alternatively, the information data and the background noise data, between selected pairs of the sending and receiving stations, said access request receiver and prioritizer for prioritizing the access requests for the allocation of the time slots responsive at least to which of the informational data and the background noise the access request is requesting; and

a time slot assignor coupled to receive indications of prioritizations performed by said access receiver and prioritizer, said time slot assignor responsive thereto for assigning available time slots to selected ones of the pairs of the sending and receiving stations.

8. The apparatus of claim 7 wherein the access requests of which indications thereof are received at said access request receiver and prioritizer include data fields identifying the access request to be for the communication of informational data.

9. The apparatus of claim 7 wherein the access requests of which indications thereof are received at said access request receiver and prioritizer data fields identifying the access request to be for the communication of background noise data.

10. The apparatus of claim 7 wherein said access request receiver and prioritizer prioritizes access requests for the allocation of the time slots for the communication of informational data with a higher priority level than access requests for the allocation of the time slots for the communication of background noise data.

11. The apparatus of claim 10 wherein said access request receiver and prioritizer further comprises a memory device for storing a queue containing access requests ranked by priority levels.

12. The apparatus of claim 11 wherein said time slot assignor further assigns available time slots to the selected pairs of sending and receiving stations to which access requests associated therewith exhibit highest priority levels.

13. The apparatus of claim 12 wherein said time slot assignor further allocates available time slots to the selected pairs of sending and receiving stations which exhibit lower priority levels only subsequent to assignation of time slots responsive to every access request exhibiting a higher priority level.

14. The apparatus of claim 7 wherein the at least one carrier comprises a plurality of carriers and wherein said apparatus further comprises:

a signal quality determiner for determining signal quality levels on each of the plurality of carriers and for associating signal quality levels with the time slots defined thereon;

and, wherein said time slot assignor is further coupled to receive indications of the signal quality levels determined by said signal quality determiner and assignations made thereat are further responsive thereto.

15. In a TDMA communication system in which data is transmitted in bursts during a selected number of time slots defined upon at least one carrier between pairs of sending and receiving stations, groups of successive time slots forming frames, an improvement of apparatus for initiating an access request for requesting allocation of time slots for communication, selectively, of informational data and background noise data between a selected sending station and a selected receiving station, the background noise data and the information data together combinable at the selected receiving station to form a receive signal, said apparatus comprising:

a request detector and formatter coupled to receive indications of a request to initiate communications between the selected sending station and the selected receiving station, said request detector and formatter for setting a data field to a first value when the indications of the request are for the allocation of time slots for the communication of background noise data and to a second value when the indications of the request are for the allocation of time slots for the communication of information data; and

an access request generator coupled to said request detector and formatter to receive the data field set thereat, said access request generator for generating an access request message including a value representative of the data field set by said request detector and formatter.

16. The apparatus of claim 15, further comprising a reply processor, coupled to said access request generator, said reply processor for determining whether an access reply message has been received from the base station, wherein said access reply message indicates that the base station has received said access request message, and generating a signal to said access request generator, to retransmit said access request message to the base station after a predetermined time period, if it is determined that said access reply burst has not been received, the duration of said predetermined time period determined by whether said data is background noise data or speech data.