Convergence sublayer for use in a wireless broadcasting system
A method of encapsulating data and a single frequency network configured to perform the method are disclosed. A content stream of data packets is received, and the data packets in the content stream are formatted in accordance with a first protocol. Information identifying a container size established for the content stream is received. The data packets formatted in accordance with the first protocol are fragmented and packed to form data units formatted in accordance with a second protocol, and the data units are sized based on the container size. The data units formatted in accordance with the second protocol are encapsulated to form second protocol data packets. The second protocol data packets are provided to a transmitter that is synchronized to one or more transmitters in a single frequency network so that each transmitter in the single frequency network broadcasts a same signal that includes the second protocol data packets.
1. A base station comprising:
a processor; and
a transmitter, operatively connected to the processor;
the processor operable to generate at least one orthogonal frequency division multiplex (OFDM) frame, the at least one OFDM frame comprising, in a first time period, downlink information indicating a location of downlink data associated with a plurality of multimedia content streams in the at least one OFDM frame, wherein the location of downlink data refers to a plurality of time and frequency resources in the at least one OFDM frame that will carry the downlink data associated with the plurality of multimedia content streams; and
the transmitter operable to transmit the OFDM frame as part of a single frequency network transmission, the OFDM frame including the downlink information and the downlink data associated with the plurality of multimedia content streams according to the downlink information.
2. The base station of claim 1 , wherein the downlink information is in a downlink MAP.
3. The base station of claim 1 , wherein the at least one OFDM frame further includes a unique identifier for at least one of the plurality of multimedia content streams.
4. The base station of claim 1 , wherein the transmitter is further operable to synchronize based on a reference time signal.
5. The base station of claim 1 , wherein the downlink data associated with the plurality of multimedia content streams includes multimedia data.
6. The base station of claim 1 , wherein the transmitter is operable to transmit the OFDM frame as part of the single frequency network transmission to at least one mobile station.
7. The base station of claim 1 , wherein the plurality of multimedia content streams are distributed by a corresponding plurality of content providers.
8. A method, performed by a base station, the method comprising:
generating at least one orthogonal frequency division multiplex (OFDM) frame, the at least one OFDM frame comprising, in a first time period, downlink information indicating a location of downlink data associated with a plurality of multimedia content streams in the at least one OFDM frame, wherein the location of downlink data refers to a plurality of time and frequency resources in the at least one OFDM frame that will carry the downlink data associated with the plurality of multimedia content streams; and
transmitting the OFDM frame as part of a single frequency network transmission, the OFDM frame including the downlink information and the downlink data associated with the plurality of multimedia content streams according to the downlink information.
9. The method of claim 8 , wherein the downlink information is in a downlink MAP.
10. The method of claim 8 , wherein the at least one OFDM frame further includes a unique identifier for at least one of the plurality of multimedia content streams.
11. The method of claim 8 , further comprising:
synchronizing based on a reference time signal.
12. The method of claim 8 , wherein the downlink data associated with the plurality of multimedia content streams includes multimedia data.
13. The method of claim 8 , wherein the OFDM frame is transmitted as part of the single frequency network transmission to at least one mobile station.
14. The method of claim 8 , wherein the plurality of multimedia content streams are distributed by a corresponding plurality of content providers.