Apparatus and method for adaptive broadcast transmission

• US 7,181,170 B2
• Filed: 12/22/2003
• Issued: 02/20/2007
• Est. Priority Date: 12/22/2003
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Balasuriya, Senaka, Bi, Hao, Love, Robert T., Classon, Brian K., Krause, David J., Kelley, Sean S.
• Primary Examiner(s): Milord; Marceau
• Application Number:
  US10/744,781
• Publication Number:
  US 20050138671A1
• Time in Patent Office: 1,156 Days
• Field of Search: 455/67.13, 455/501, 455/63.1, 455/450, 455/452.1, 714/748, 714/749, 375/141, 370/230, 370/432
• US Class Current: 455/67.13
• CPC Class Codes: H04B 17/23 Indication means, e.g. displays, alarms, audible means
• CPC Class Codes: H04H 20/42 Arrangements for resource management
• CPC Class Codes: H04H 2201/33 via the broadcast channel
• CPC Class Codes: H04H 60/11 Arrangements for counter-measures when a portion of broadcast information is unavailable
• CPC Class Codes: H04H 60/91 Mobile communication networks for accessing the Internet H04H60/85
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1692 Physical properties of the supervisory signal, e.g. acknowledgement by energy bursts
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04N 21/44209 Monitoring of downstream path of the transmission network originating from a server, e.g. bandwidth variations of a wireless network arrangements for maintenance or administration in data switching networks involving bandwidth and capacity management H04L41/0896
• CPC Class Codes: H04N 21/6131 involving transmission via a mobile phone network wireless downlink channel access H04W74/006
• CPC Class Codes: H04N 21/6371 directed to network
• CPC Class Codes: H04N 21/64792 Controlling the complexity of the content stream, e.g. by dropping packets intermediate media network packet handling H04L65/765; proxy provisioning conversion or adaptation for reducing the amount or size of exchanged application data H04L67/5651; negotiation of resources in wireless networks H04W28/16
• CPC Class Codes: H04N 7/17309 Transmission or handling of upstream communications
• CPC Class Codes: H04W 52/322 Power control of broadcast channels

Abstract

An apparatus and method for adaptive broadcast transmission. A broadcast transmission can be received. Insufficiency of a broadcast channel quality can be determined. A negative acknowledgement signal can be sent on a common uplink channel in response to determining the broadcast channel quality is insufficient. The negative acknowledgement signal can be received on the common uplink channel at another location, the negative acknowledgement signal indicating broadcast channel quality is insufficient. The broadcast channel quality can be adjusted in response to receiving the negative acknowledgement signal.

Claims

1. A method for adaptive broadcast reception in a wireless device, comprising:

receiving a broadcast transmission;

determining a broadcast channel quality is insufficient; and

sending a negative acknowledgement signal on a common uplink channel in response to determining the broadcast channel quality is insufficient.

2. The method according to claim 1, wherein the negative acknowledgement signal indicates the negative acknowledgement signal is directed to a specific broadcast transmission.

3. The method according to claim 2, wherein the negative acknowledgement signal indicates the negative acknowledgement signal is directed to a specific broadcast transmission by using at least one of a pseudo noise sequence offset, a preamble sequence selection, and a time slot assignment.

4. The method according to claim 1, wherein determining the broadcast channel quality is insufficient determines the broadcast channel quality is insufficient based on at least one of detecting a selected amount of broadcast packet errors, detecting a selected amount of frame erasures, detecting a symbol error rate is above a threshold, detecting an undesirable signal to noise ratio, and detecting a broadcast packet error using a cyclic redundancy check code.

5. The method according to claim 1, wherein the common uplink channel is a random access channel.

6. The method according to claim 1, wherein determining a broadcast channel quality is insufficient further comprises determining a specific layer quality of a multi-layer broadcast service channel is insufficient, and

wherein sending a negative acknowledgement signal on a common uplink channel in response to determining the broadcast channel quality is insufficient further comprises sending a negative acknowledgement signal on a common uplink channel indicating the specific layer quality is insufficient in response to determining the broadcast channel quality is insufficient.

7. The method according to claim 1, wherein determining a broadcast channel quality is insufficient further comprises:

computing a broadcast channel quality metric;

comparing the broadcast channel quality metric to a threshold; and

determining the broadcast channel quality is insufficient based on a result of comparing the broadcast channel quality metric to the threshold.

8. The method according to claim 7, wherein determining the broadcast channel quality is insufficient based on a result of comparing the broadcast channel quality metric to the threshold determines the broadcast channel quality is insufficient if the broadcast channel quality metric exceeds the threshold.

9. An apparatus for adaptive broadcast reception in a wireless device, comprising:

a transceiver configured to receive a broadcast transmission; and

a controller configured to determine whether a broadcast channel quality is insufficient and send a negative acknowledgement signal on a common uplink channel in response to determining the broadcast channel quality is insufficient.

10. The apparatus according to claim 9, wherein the negative acknowledgement signal indicates the negative acknowledgement signal is directed to a specific broadcast transmission.

11. The apparatus according to claim 9, wherein the negative acknowledgement signal indicates the negative acknowledgement signal is directed to a specific broadcast transmission by using at least one of a pseudo noise sequence offset, a preamble sequence selection, and a time slot assignment.

12. The apparatus according to claim 9, wherein the controller determines the broadcast channel quality is insufficient based on at least one of detecting a selected amount of broadcast packet errors, detecting a selected amount of frame erasures, detecting a symbol error rate is above a threshold, detecting an undesirable signal to noise ratio, and detecting a broadcast packet error using a cyclic redundancy check code.

13. The apparatus according to claim 9, wherein the common uplink channel is a random access channel.

14. The apparatus according to claim 9, wherein the controller determines a broadcast channel quality is insufficient by determining a specific layer quality of a multi-layer broadcast service channel is insufficient, and

wherein the controller sends a negative acknowledgement signal on a common uplink channel in response to determining the broadcast channel quality is insufficient by sending a negative acknowledgement signal on a common uplink channel indicating the specific layer quality is insufficient.

15. The apparatus according to claim 9, wherein the controller further determines the broadcast channel quality is insufficient by computing a broadcast channel quality metric, comparing the broadcast channel quality metric to a threshold, and determining the broadcast channel quality is insufficient based on a result of comparing the broadcast channel quality metric to the threshold.

16. The apparatus according to claim 15, wherein the controller determines the broadcast channel quality is insufficient based on a result of comparing the broadcast channel quality metric to the threshold by determining the broadcast channel quality is insufficient if the broadcast channel quality metric exceeds the threshold.

17. A method for adaptive broadcast transmission in a wireless system, comprising:

transmitting a broadcast transmission on a broadcast channel;

receiving a negative acknowledgement signal on a common uplink channel, the negative acknowledgement signal indicating broadcast channel quality is insufficient; and

adjusting the broadcast channel quality in response to receiving the negative acknowledgement signal.

18. The method according to claim 17, wherein the adjusting the broadcast channel quality comprises at least one of increasing a bandwidth of the broadcast transmission, increasing a power of the broadcast transmission, decreasing a code rate of the broadcast transmission, decreasing an information rate of the broadcast transmission, stopping the broadcast transmission, and increasing a number of time slots assigned to the broadcast transmission.

19. The method according to claim 17, further comprising:

determining the negative acknowledgement signal as belonging to a specific broadcast transmission,

wherein the adjusting further comprises adjusting an attribute of the specific broadcast transmission in response to receiving the negative acknowledgement signal.

20. The method according to claim 19, wherein determining the negative acknowledgement signal as belonging to a specific broadcast transmission determines the negative acknowledgement signal as belonging to a specific broadcast transmission by using at least one of a pseudo noise sequence offset, a preamble sequence selection, and a time slot assignment.

21. The method according to claim 17, further comprising:

generating an energy metric; and

determining the broadcast channel quality is insufficient by comparing the energy metric to a threshold.

22. The method according to claim 17, wherein adjusting the broadcast channel quality in response to receiving the negative acknowledgement signal further comprises modifying attributes of the broadcast channel.

23. The method according to claim 22, wherein the attributes of the broadcast channel include at least one of a signal strength, a coding rate, a data rate, a bandwidth, and a fraction of code space utilized.

24. The method according to claim 17,

wherein receiving a negative acknowledgement signal on a common uplink channel comprises receiving a plurality of negative acknowledgement signals on a common uplink channel from a plurality of users, and

wherein the method further comprises aggregating the plurality of negative acknowledgement signals.

25. An apparatus for adaptive broadcast transmission in a wireless system, comprising:

a transceiver configured to transmit a broadcast transmission on a broadcast channel; and

a controller configured to receive a negative acknowledgement signal on a common uplink channel, the negative acknowledgement signal indicating a broadcast channel quality is insufficient, wherein the controller is further configured to adjust the broadcast channel quality in response to receiving tho negative acknowledgement signal.

26. The apparatus according to claim 25, wherein the controller adjusts the broadcast channel quality by at least one of increasing a bandwidth of the broadcast transmission, increasing a power of the broadcast transmission, decreasing a code rate of the broadcast transmission, decreasing an information rate of the broadcast transmission, stopping the broadcast transmission, and increasing a number of time slots assigned to the broadcast transmission.

27. The apparatus according to claim 25, wherein the controller is further configured to determine the negative acknowledgement signal as belonging to a specific broadcast transmission and adjust an attribute of the specific broadcast transmission in response to receiving the negative acknowledgement signal.

28. The apparatus according to claim 27, wherein the controller is further configured to determine the negative acknowledgement signal as belonging to a specific broadcast transmission by using at least one of a pseudo noise sequence offset, a preamble sequence selection, and a time slot assignment.

29. The apparatus according to claim 25, wherein the controller is further configured to generate an energy metric and determine the broadcast channel quality is insufficient by comparing the energy metric to a threshold.

30. The apparatus according to claim 25, wherein the controller adjusts the broadcast channel quality in response to receiving the negative acknowledgement signal by modifying attributes of the broadcast channel.

31. The apparatus according to claim 30, wherein the attributes of the broadcast channel include at least one of a signal strength, a coding rate, a data rate, a bandwidth, and a fraction of code space utilized.

32. The apparatus according to claim 25,

wherein the controller receives a negative acknowledgement signal on a common uplink channel by receiving a plurality of negative acknowledgement signals on a common uplink channel from a plurality of users, and

wherein the controller is further configured to aggregate the plurality of negative acknowledgement signals.