Multimedia broadcast forwarding systems and methods

• US 9,083,474 B2
• Filed: 04/27/2009
• Issued: 07/14/2015
• Est. Priority Date: 04/25/2008
• Status: Expired due to Fees

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Krishnaswamy, Dilip, Raveendran, Vijayalakshmi R., Daley, Robert S.
• Primary Examiner(s): CHEN, CAI Y
• Application Number:
  US12/430,762
• Publication Number:
  US 20090268807A1
• Time in Patent Office: 2,269 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04H 20/08 among terminal devices
• CPC Class Codes: H04H 20/42 Arrangements for resource management
• CPC Class Codes: H04H 60/92 for local area
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

In various embodiments, communication apparatus and methods for providing robust communications are disclosed. For example, an exemplary communication apparatus for distributing media to one or more receiving apparatus may include receiving circuitry to receive a first wireless multimedia broadcast signal containing at least a first media stream, transmitting circuitry to wirelessly transmit one or more individual media streams simultaneously to the one or more receiving apparatus using one or more wireless transmit signals, and decision circuitry configured to control the transmitting circuitry to transmit the first media stream to at least one receiving apparatus using at least one wireless transmit signal type based on a forward-link data capacity of each wireless channel between the transmitting circuitry and each receiving apparatus.

Claims

1. A wireless communication device for distributing media to one or more receiving apparatus, comprising:

receiving circuitry to receive a first wireless multimedia broadcast signal containing individual media streams;

extraction circuitry to extract the individual media streams including at least a first media stream from the received multimedia broadcast signal;

transmitting circuitry to wirelessly transmit each of the individual media streams simultaneously to respective ones of a plurality of receiving apparatus via different wireless channels using different wireless signal protocols;

decision circuitry to select a wireless signal protocol from the different wireless signal protocols based on variable wireless conditions local to the wireless communication device including a forward-link data capacity of each of the different wireless channels between the transmitting circuitry and each of the plurality of receiving apparatus, to control the transmitting circuitry to transmit the first media stream to at least one receiving apparatus by the selected wireless signal protocol, to determine a more advantageous one of the different wireless signal protocols for a switch of protocols based on information regarding existence and status of the different wireless channels using the different wireless signal protocols, and to switch from the selected wireless signal protocol to the more advantageous wireless signal protocol to transmit the first media stream from the transmitting circuitry to the at least one receiving apparatus in response to the more advantageous wireless signal protocol being determined; and

handoff circuitry responsive to the decision circuitry to control the transmitting circuitry to switch protocols.

2. The device of claim 1, wherein the receiving circuitry has a capability of receiving a wireless multimedia broadcast signal containing a plurality of different media streams, at least a subset of the media streams provided under different multimedia protocols.

3. The device of claim 2, wherein at least a subset of the media streams comprises multimedia broadcast transmission signals selected from the group of Forward Link Only (FLO), DVB-H, DVB-SH, ATSC M/H, DVB-T, ISDB-T and S-DMB signals.

4. The device of claim 3, further comprising:

extraction circuitry to extract individual media streams from the received wireless multimedia broadcast signal,

wherein the wireless multimedia broadcast signal contains a plurality of audio-visual media streams.

5. The device of claim 1, wherein the decision circuitry has a capability of controlling the transmitting circuitry responsive to at least one of a signal environment and a capability of a plurality of the receiving apparatus.

6. The device of claim 1, wherein the decision circuitry has a capability of receiving feedback information from the receiving devices representative of wireless reception by the receiving devices.

7. The device of claim 6, wherein:

the information representative of the forward-link data capacity includes channel quality information of the wireless channels between the transmitting circuitry and each receiving apparatus; and

the transmitting circuitry transmits media streams to receiving apparatus using the different wireless signal protocols, including include at least two of Bluetooth, an 802.11 variant, an 802.15 variant, and Ultra Wide Band (UWB).

8. The device of claim 6, wherein:

the decision circuitry has a capability of dynamically changing a version of the first data stream based upon changes of the forward-link data capacity of at least one wireless channel between the transmitting circuitry and each receiving apparatus carrying the first media stream.

9. The device of claim 6, wherein the decision circuitry selects among different versions or protocols of the first data stream based on the visual resolution of a display of each receiving apparatus.

10. The device of claim 9, wherein the different versions or protocols of at least one of the individual media streams with one of the different versions or protocols having at least one of a lesser quality and a lesser bandwidth requirement than another one of the different versions or protocols.

11. The device of claim 1, wherein the decision circuitry has a capability of dynamically reallocating transmit resources of the transmitting circuitry based upon changes of the forward-link data capacity of at least one wireless channel between the transmitting circuitry and each receiving apparatus.

12. The device of claim 1, wherein the decision circuitry has a capability of causing the transmitting circuitry to add an additional transmit signal to transmit the first media stream such that a receiving apparatus having a diminishing forward-link data capacity will continue to receive the first media stream.

13. The device of claim 1, wherein the decision circuitry has a capability of automatically selecting a media-coding scheme for the media-coded stream of data based on at least one of a wireless communication standard used between the transmitting circuitry and the receiving apparatus, a data transfer capacity of a wireless channel between the transmitting circuitry and the receiving apparatus and information provided by the receiving apparatus about a physical characteristic of the receiving apparatus.

14. The device of claim 1, further comprising:

the receiving circuitry to receive the first wireless multimedia broadcast signal containing a plurality of different media streams for the extraction of the individual media streams; and

the decision circuitry coupled to the transmitting circuitry to allocate at least one of the one or more wireless channels based on at least one of data bandwidth and channel quality of each wireless transmit channel.

15. The device of claim 1, further comprising:

an outer-coding circuit to dynamically change an outer-coding scheme for a first stream of data to use one of a plurality of available outer-coding schemes with each outer-coding scheme having a different level of robustness to produce a dynamically outer-coded stream of data; and

the transmitting circuitry to transmit the dynamically outer-coded stream of data to a receiving apparatus.

16. The device of claim 1, further comprising:

decryption circuitry including a decryption key to decrypt one or more of the encrypted media streams to produce at least a decrypted first media stream;

the transmitting circuitry to encrypt and transmit one or more of the individual media streams to the one or more receiving apparatuses using one or more transmit signals;

media control circuitry to control the distribution of the first media stream to at least one receiving apparatus via the transmitting circuitry, and to provide the at least one receiving apparatus with at least a first session key enabling the at least one receiving apparatus to access the first media stream.

17. The device of claim 16, wherein the decryption circuitry has a capability of permitting reception “

pass-through”

transmissions or transmissions of a reduced encryption without decryption processing.

18. The device of claim 1, further comprising:

a protocol selection circuit to cause the transmitting circuitry to change transmission of the first stream of payload information from a first communication channel using a first one of the different wireless signal protocols to a second communication channel using a second one of the different wireless signal protocols without appreciable interruption of data flow between the transmitting circuitry and the first receiving apparatus; and

the transmitting circuitry comprising a plurality of transmitting circuits each to transmit a first stream of payload information to a first receiving apparatus using the different wireless signal protocols; and

the decision circuitry to perform receiving information relating to a change of wireless signal protocol from the first receiving apparatus.

19. The device of claim 1, further comprising:

an outer-coding circuit to differentially change an outer-coding scheme for a first stream of data to use one of a plurality of available outer-coding schemes with each outer-coding scheme having a different level of robustness to produce a differentially outer-coded stream of data; and

the transmitting circuitry to transmit the differentially outer-coded stream of data to a receiving apparatus.

20. The device of claim 1, further comprising:

a constraint processing module, responsive to at least one factor related to a capability of the of the wireless communication device to provide service to ones of the receiving devices at a predetermined quality of service (QoS), by limiting the transmission of one or more wireless transmit signals to the client devices in accordance with the capability of the wireless communication device.

21. The device of claim 20, wherein the factors related to the capability of the wireless communication device to provide service comprises at least one of a wireless protocol capability of the receiving devices, output link quality data, energy available to the multimedia broadcast forwarding device or “

battery indicator”

data, processing constraints of the multimedia broadcast forwarding device, and processing constraints of the receiving devices.

22. The device of claim 20, further comprising:

a wireless protocol capability module providing the constraint processing module with data concerning a wireless protocol capability of the receiving devices;

an output link quality indicators module providing the constraint processing module with data concerning a output link quality data;

a platform energy level indicator providing the constraint processing module with data concerning energy available to the multimedia broadcast forwarding device or “

battery indicator”

data; and

a processing constraints module providing the constraint processing module with data concerning processing constraints of the multimedia broadcast forwarding device and processing constraints of the receiving devices, the constraint processing module, responsive to at least one factor related to a capability of the of the wireless communication device to provide service to ones of the receiving devices, by limiting the transmission of said one or more wireless transmit signals to the client devices in accordance with the capability of the wireless communication device based on at least one of a wireless communication standard used between the transmitting circuitry and the receiving apparatus, a data transfer capacity of a wireless channel between the transmitting circuitry and the receiving apparatus and information provided by the receiving apparatus, wherein the information provided by the receiving device comprises information provided by the receiving apparatus about a physical characteristic of the receiving apparatus.

23. The device of claim 20, wherein:

the constraint processing module controls the transmission of the one or more individual media streams simultaneously to the one or more receiving apparatus using one or more wireless transmit signals by limiting the number and output power of the output streams;

in the case of surplus availability of platform energy, reduces or eliminates restraint on the number and output power of the output streams responsive to availability of platform energy; and

in cases of limited availability of platform energy, the constraint processing module limits output in order to provide service to at least some client devices with at least a predetermined quality of service (QoS).

24. The device of claim 23, wherein the information provided by the receiving device comprises information provided by the receiving apparatus about an ability of the receiving apparatus to process signals selected from the group of Forward Link Only (FLO), DVB-H, DVB-SH, ATSC M/H, DVB-T, ISDB-T and S-DMB signals.