Bandwidth allocation method of wirelessly transmitting AV stream data in wireless communication system including coordinator device

1. A bandwidth allocation method for use in a wireless communication system, the wireless communication system including a source device and a bandwidth management device for managing a bandwidth for wireless transmission, the wireless communication system wirelessly transmitting one of (a) first stream data including video and audio data and (b) second stream data including video data from the source device to a first sink device, and wirelessly transmitting third stream data including audio data from the source device to a second sink device, the bandwidth allocation method comprising:

receiving, via the source device, a first output format notification signal transmitted from the first sink device;

receiving, via the source device, a second output format notification signal transmitted from the second sink device;

in response to the source device receiving the first output format notification signal transmitted from the first sink device, transmitting, via the source device, a first bandwidth allocation request signal for requesting allocation of a bandwidth for transmitting the first stream data to the first sink device, to the bandwidth management device;

in response to the source device receiving the second output format notification signal transmitted from the second sink device, transmitting, via the source device, a second bandwidth allocation request signal for requesting allocation of a bandwidth for transmitting the third stream data to the second sink device, to the bandwidth management device;

determining, in response to the first and second bandwidth allocation request signals and via the bandwidth management device, whether or not the first and second bandwidth allocation request signals originated from a same source device; and

when said determining determines that the first and second bandwidth allocation request signals have originated from the same source device and via the bandwidth management device, allocating a first reservation period for transmitting the first stream data from the source device to the first sink device and a second reservation period for transmitting the third stream data from the source device to the second sink device within a predetermined one frame period, and transmitting a beacon signal including information of the allocation of the first and second reservation periods.

2. The bandwidth allocation method for use in the wireless communication system as claimed in claim 1 , wherein the bandwidth allocation method further includes, after the source device receives the beacon signal including the information of the allocation, transmitting, via the source device, the second stream data to the first sink device for an allocated first reservation period, and transmitting the third stream data to the second sink device for an allocated second reservation period.

3. The bandwidth allocation method for use in the wireless communication system as claimed in claim 1 , wherein the bandwidth allocation method further includes, after the source device receives the beacon signal, transmitting, via the source device, one stream data of the first and second stream data to the first sink device for the first reservation period allocated within the frame period, and transmitting another stream data of the first and second stream data to the first sink device for the first reservation period allocated within a next frame period next to the frame period.

4. The bandwidth allocation method for use in the wireless communication system as claimed in claim 1 , wherein the bandwidth allocation method further includes dividing, via the bandwidth management device, the first reservation period into two periods, and allocating, via the bandwidth management device, the second reservation period between divided two periods.

5. The bandwidth allocation method for use in the wireless communication system as claimed in claim 1 , wherein the bandwidth allocation method further includes dividing, via the bandwidth management device, the first reservation period into a plurality of first divided periods, dividing, via the bandwidth management device, the second reservation period into a plurality of second divided periods, and allocating, via the bandwidth management device, respective first divided periods and respective second divided periods within the frame period so that the first divided periods and the second divided periods are located alternately with each other.

6. The bandwidth allocation method for use in the wireless communication system as claimed in claim 1 ,

wherein the bandwidth allocation method further includes, in response to the first bandwidth allocation request signal, allocating, via the bandwidth management device, the first reservation period within the predetermined one frame period, and transmitting, via the bandwidth management device, a first beacon signal including information of the allocation of the first reservation period,

wherein the bandwidth allocation method further includes, after the source device receives the first beacon signal, transmitting, via the source device, the first stream data to the first sink device for the first reservation period within the frame period, and thereafter, transmitting, via the source device, the second bandwidth allocation request signal to the bandwidth management device,

wherein the bandwidth allocation method further includes, in response to the second bandwidth allocation request signal, allocating, via the bandwidth management device, the second reservation period within a next frame period next to the frame period, and transmitting, via the bandwidth management device, a second beacon signal including information of the allocation of the second reservation period, and

wherein the bandwidth allocation method further includes, after the source device receives the second beacon signal, transmitting, via the source device, the second stream data to the first sink device for an allocated first reservation period, and transmitting, via the source device, the third stream data to the second sink device for an allocated second reservation period.

7. The bandwidth allocation method for use in the wireless communication system as claimed in claim 1 ,

wherein the bandwidth allocation method further includes, in response to the second bandwidth allocation request signal, allocating, via the bandwidth management device, the second reservation period within the predetermined one frame period, and transmitting, via the bandwidth management device, a first beacon signal including information of the allocation of the second reservation period,

wherein the bandwidth allocation method further includes, after the source device receives the second beacon signal, transmitting, via the source device, the third stream data to the second sink device for the second reservation period within the frame period, and thereafter, transmitting, via the source device, the first bandwidth allocation request signal to the bandwidth management device,

wherein the bandwidth allocation method further includes, in response to the first bandwidth allocation request signal, allocating, via the bandwidth management device, the first reservation period within a next frame period next to the frame period, and transmitting, via the bandwidth management device, a second beacon signal including information of the allocation of the first reservation period, and

wherein the bandwidth allocation method further includes, after the source device receives the second beacon signal, transmitting, via the source device, the second stream data to the first sink device for the allocated first reservation period, and transmitting, via the source device, the third stream data to the second sink device for the allocated second reservation period.

8. A wireless communication system for wirelessly transmitting one of (a) first stream data including video and audio data and (b) second stream data including video data from a source device to a first sink device, and for wirelessly transmitting third stream data including audio data from the source device to a second sink device, the wireless communication system comprising:

a bandwidth management device for managing a bandwidth for wireless transmissions;

the source device;

the first sink device; and

the second sink device,

wherein the source device receives a first output format notification signal transmitted from the first sink device,

wherein the source device receives a second output format notification signal transmitted from the second sink device,

wherein, in response to receiving the first output format notification signal, the source device transmits a first bandwidth allocation request signal for requesting allocation of a bandwidth for transmitting the first stream data to the first sink device, to the bandwidth management device,

wherein, in response to receiving the second output format notification signal, the source device transmits a second bandwidth allocation request signal for requesting allocation of a bandwidth for transmitting the third stream data to the second sink device, to the bandwidth management device,

wherein, in response to the first and second bandwidth allocation request signals, the bandwidth management device determines whether or not the first and second bandwidth allocation request signals originated from a same source device, and

wherein, when the bandwidth management device determines that the first and second bandwidth allocation request signals have originated from the same source device, the bandwidth management device allocates a first reservation period for transmitting the first stream data from the source device to the first sink device and a second reservation period for transmitting the third stream data from the source device to the second sink device within a predetermined one frame period, and transmits a beacon signal including information of the allocation of the first and second reservation periods.

9. The wireless communication system as claimed in claim 8 , wherein, after receiving the beacon signal including the information of the allocation, the source device transmits the second stream data to the first sink device for an allocated first reservation period, and transmits the third stream data to the second sink device for an allocated second reservation period.

10. The wireless communication system as claimed in claim 8 , wherein, after receiving the beacon signal, the source device transmits one stream data of the first and second stream data to the first sink device for the first reservation period allocated within the frame period, and transmits another stream data of the first and second stream data to the first sink device for the first reservation period allocated within a next frame period next to the frame period.

11. The wireless communication system as claimed in claim 8 , wherein the bandwidth management device divides the first reservation period into two periods, and allocates the second reservation period between the divided two periods.

12. The wireless communication system as claimed in claim 8 , wherein the bandwidth management device divides the first reservation period into a plurality of first divided periods, divides the second reservation period into a plurality of second divided periods, and allocates the respective first divided periods and the respective second divided periods within the frame period so that the first divided periods and the second divided periods are located alternately with each other.

13. The wireless communication system as claimed in claim 8 ,

wherein, in response to the first bandwidth allocation request signal, the bandwidth management device, allocates the first reservation period within the predetermined one frame period, and transmits a first beacon signal including information of the allocation of the first reservation period,

wherein, after receiving the first beacon signal, the source device transmits the first stream data to the first sink device for the first reservation period within the frame period, and thereafter, transmits the second bandwidth allocation request signal to the bandwidth management device,

wherein, in response to the second bandwidth allocation request signal, the bandwidth management device further allocates the second reservation period within a next frame period next to the frame period, and transmits a second beacon signal including information of the allocation of the second reservation period, and

wherein, after receiving the second beacon signal, the source device transmits the second stream data to the first sink device for an allocated first reservation period, and transmits the third stream data to the second sink device for an allocated second reservation period.

14. The wireless communication system as claimed in claim 8 ,

wherein, in response to the second bandwidth allocation request signal, the bandwidth management device allocates the second reservation period within the predetermined one frame period, and transmits a first beacon signal including information of the allocation of the second reservation period,

wherein, after receiving the second beacon signal, the source device transmits the third stream data to the second sink device for the second reservation period within the frame period, and thereafter, transmits the first bandwidth allocation request signal to the bandwidth management device,

wherein, in response to the first bandwidth allocation request signal, the bandwidth management device further allocates the first reservation period within a next frame period next to the frame period, and transmits a second beacon signal including information of the allocation of the first reservation period, and

wherein, after receiving the second beacon signal, the source device transmits the second stream data to the first sink device for the allocated first reservation period, and transmits the third stream data to the second sink device for the allocated second reservation period.

15. A wireless communication system including a bandwidth management device and a source device, the wireless communication system for wirelessly transmitting one of (a) first stream data including video and audio data and (b) second stream data including video data from the source device to a first sink device, and for wirelessly transmitting third stream data including audio data from the source device to a second sink device, the bandwidth management device managing a bandwidth for wireless transmission,

wherein the source device receives a first output format notification signal transmitted from the first sink device,

wherein the source device receives a second output format notification signal transmitted from the second sink device,

wherein, in response to receiving the first output format notification signal, the source device transmits a first bandwidth allocation request signal for requesting allocation of a bandwidth for transmitting the first stream data to the first sink device, to the bandwidth management device,

wherein, in response to receiving the second output format notification signal, the source device transmits a second bandwidth allocation request signal for requesting allocation of a bandwidth for transmitting the third stream data to the second sink device, to the bandwidth management device,

wherein, in response to the first and second bandwidth allocation request signals, the bandwidth management device determines whether or not the first and second bandwidth allocation request signals originated from a same source device, and

wherein, when the bandwidth management device determines that the first and second bandwidth allocation request signals have originated from the same source device, the bandwidth management device allocates a first reservation period for transmitting the first stream data from the source device to the first sink device and a second reservation period for transmitting the third stream data from the source device to the second sink device within a predetermined one frame period, and transmits a beacon signal including information of the allocation of the first and second reservation periods.