Wireless communication network including data prioritizaiton and packet reception error determination features and related methods

• US 20030179756A1
• Filed: 03/27/2003
• Published: 09/25/2003
• Est. Priority Date: 01/10/2002
• Status: Active Grant

• Current Assignee: Stingray IP Solutions LLC (Acacia Research Corporation)
• Original Assignee: Harris Corporation (L3Harris Technologies, Inc.)
• Inventors: Cain, Joseph Bibb
• Granted Patent: US 6,982,987 B2
• Time in Patent Office: Days
• US Class Current: 370/395.42
• CPC Class Codes: H04B 7/0491 using two or more sectors, i.e. sector diversity
• CPC Class Codes: H04B 7/2643 using time-division multiple access [TDMA] H04B7/2615, H04B7/2618 take precedence
• CPC Class Codes: H04J 3/1694 Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers Passive Optical Networks H04Q11/0062
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 1/203 Details of error rate determination, e.g. BER, FER or WER
• CPC Class Codes: H04L 47/2441 relying on flow classification, e.g. using integrated services [IntServ]
• CPC Class Codes: H04L 47/29 using a combination of thresholds
• CPC Class Codes: H04L 47/50 Queue scheduling
• CPC Class Codes: H04L 47/626 channel conditions
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 28/02 Traffic management, e.g. flow control or congestion control
• CPC Class Codes: H04W 40/06 based on characteristics of available antennas
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/54 based on quality criteria
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 72/56 based on priority criteria
• CPC Class Codes: H04W 72/569 of the traffic information
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 8/04 : Registration at HLR or HSS [Home Subscriber Server]
• CPC Class Codes: H04W 84/18 : Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

A wireless communication network may include a plurality of mobile nodes each including a wireless transceiver and a controller for controlling the wireless transceiver. The controller may also be for scheduling a plurality of time slots for establishing a communication link with a neighboring mobile node for transmitting data therebetween, where the data has a plurality of priority levels. The controller may also determine respective link quality values associated with the communication link during the time slots, and prioritize data to be transmitted during the time slots based upon the priority level of the data and the link quality values.

Claims

1. A wireless communication network comprising:

a plurality of mobile nodes each comprising a wireless transceiver and a controller for controlling said wireless transceiver, said controller also for

scheduling a plurality of time slots for establishing a communication link with a neighboring mobile node for transmitting data therebetween, the data having a plurality of priority levels,

determining respective link quality values associated with the communication link during each time slot, and

prioritizing data to be transmitted during the time slots based upon the priority level of the data and the link quality values.

2. The wireless communication network of claim 1 wherein one of the priority levels comprises a network control data priority level, and wherein the network control data priority level is given the highest priority.

3. The wireless communication network of claim 1 wherein said controller assigns data corresponding to a highest one of the priority levels to the time slot having the highest link quality value associated therewith.

4. The wireless communication network of claim 1 wherein the link quality value is based upon a signal-to-interference ratio (SIR) associated with the communication link during a respective time slot.

5. The wireless communication network of claim 1 wherein the link quality value is based upon a packet reception error value associated with the communication link during a respective time slot.

6. The wireless communication network of claim 1 wherein said controller further prioritizes the data to be transmitted based upon an order in which the data was received.

7. The wireless communication network of claim 1 wherein each priority level has a minimum quality threshold associated therewith;

and wherein said controller prioritizes the data to be transmitted by assigning data corresponding to a given priority level to a first available time slot for which the link quality value is above the respective minimum quality threshold.

8. The wireless communication network of claim 7 wherein the minimum quality thresholds increase with the priority of the data priority levels.

9. A wireless communication network comprising:

a plurality of mobile nodes including a source node and a destination node for establishing a communication link therebetween during a time slot;

said source node transmitting a predetermined number of data packets to said destination node during the time slot along with an overhead packet indicating the number of data packets transmitted;

said destination node determining a packet reception error value associated with the time slot based upon a number of data packets received and the number of data packets transmitted if the overhead packet is received, and otherwise estimating the packet reception error value based upon a fraction of the time slot occupied by received data packets.

10. The wireless communication network of claim 9 wherein said destination node further determines a link quality value associated with the communication link based upon the packet reception error value, and wherein said source node and said destination node change a level of usage of the communication link based upon the link quality value.

11. The wireless communication network of claim 10 wherein said source node and said destination node discontinue use of the communication link during the time slot if the link quality value falls below a first threshold.

12. The wireless communication network of claim 11 wherein said source node and said destination node continue using the communication link during the time slot if the link quality value increases above a second threshold higher than the first threshold.

13. The wireless communication network of claim 10 wherein said source node and said destination node establish a new time slot for establishing the wireless communication link therebetween if the link quality value remains below a threshold for a predetermined duration.

14. The wireless communication network of claim 10 wherein each data packet is associated with one of a plurality of priority levels, and wherein said source node only transmits data packets corresponding to at least one lowest priority level if the link quality value falls below a threshold.

15. The wireless communication network of claim 10 wherein said destination node further determines the link quality value based upon a signal-to-interference ratio (SIR) associated with the communication link during the time slot.

16. The wireless communication network of claim 9 wherein said plurality of mobile nodes each comprises a transceiver, an antenna connected to said at least one transceiver, and a controller for controlling said transceiver.

17. The wireless communication network of claim 16 wherein said antenna comprises a phased array antenna.

18. A communication method for a wireless communication network comprising a plurality of mobile nodes, the method comprising:

scheduling a plurality of time slots for establishing a communication link between a pair of mobile nodes for transmitting data therebetween, the data having a plurality of priority levels;

determining respective link quality values associated with the communication link during each time slot; and

prioritizing data to be transmitted during the time slots based upon the priority level of the data and the link quality values.

19. The method of claim 18 wherein one of the priority levels comprises a network control data priority level, and wherein the network control data priority level is given the highest priority.

20. The method of claim 18 wherein prioritizing comprises assigning data corresponding to a highest one of the priority levels to the time slot having the highest link quality value associated therewith.

21. The method of claim 18 wherein the quality value is based upon a signal-to-interference ratio (SIR) associated with the communication link during a respective time slot.

22. The method of claim 18 wherein the link quality value is based upon a packet reception error value associated with the communication link during a respective time slot.

23. The method of claim 18 wherein prioritizing further comprises prioritizing the data to be transmitted based upon an order in which the data was received.

24. The method of claim 18 wherein each priority level has a minimum quality threshold associated therewith;

and prioritizing comprises prioritizing the data to be transmitted by assigning data corresponding to a given priority level to a first available time slot for which the link quality value is above the respective minimum quality threshold.

25. The method of claim 24 wherein the minimum quality thresholds increase with the priority of the data priority levels.

26. A method for communicating between a source node and a destination node in a wireless communication network comprising a plurality of mobile nodes, the method comprising:

establishing a communication link between the source node and destination node during a time slot;

transmitting a predetermined number of data packets from the source node to the destination node during the time slot along with an overhead packet indicating the number of data packets transmitted; and

determining a packet reception error value associated with the time slot based upon a number of data packets received by the destination node and the number of data packets transmitted by the source node if the overhead packet is received by the destination node, and otherwise estimating the packet reception error value based upon a fraction of the time slot occupied by received data packets.

27. The method of claim 26 wherein the destination node further determines a link quality value associated with the communication link based upon the packet reception error value, and wherein the source node and the destination node change a level of usage of the communication link based upon the link quality value.

28. The method of claim 27 wherein the source node and the destination node discontinue use of the communication link during the time slot if the link quality value falls below a first threshold.

29. The method of claim 27 wherein the source node and the destination node continue using the communication link during the time slot if the link quality value increases above a second threshold higher than the first threshold.

30. The method of claim 27 wherein the source node and the destination node establish a new time slot for establishing the wireless communication link therebetween if the link quality value remains below a threshold for a predetermined duration.

31. The method of claim 27 wherein each data packet is associated with one of a plurality of priority levels, and wherein the source node only transmits data packets corresponding to at least one lowest priority level if the link quality value falls below a threshold.

32. The method of claim 26 wherein determining further comprises determining the link quality value based upon a signal-to-interference ratio (SIR) associated with the communication link during the time slot.