초록 ▼

A method of wireless handover in a broadcast network (FIGS. 5 and 8) is disclosed. A wireless receiver (FIG. 4) receives a first signal (N) from a first transmitter (f1). The receiver measures a signal strength (RSSI) of the first signal. The strength of the first signal is compared to a first thres

A method of wireless handover in a broadcast network (FIGS. 5 and 8) is disclosed. A wireless receiver (FIG. 4) receives a first signal (N) from a first transmitter (f1). The receiver measures a signal strength (RSSI) of the first signal. The strength of the first signal is compared to a first threshold (T0). The receiver receives a second signal (N+3) from a second transmitter (f3) in response to the step of comparing. The first and the second signals are sent to an application processor (120). The wireless receiver continues to receive the first and second signals until the application processor terminates receiving one of the first and second signals.

대표청구항 ▼

1. A method of wireless handover in a broadcast network, comprising the steps of: receiving a first signal from a first transmitter in the broadcast network;measuring a quality of the first signal;comparing the quality of the first signal to a first threshold;receiving a second signal from a second

1. A method of wireless handover in a broadcast network, comprising the steps of: receiving a first signal from a first transmitter in the broadcast network;measuring a quality of the first signal;comparing the quality of the first signal to a first threshold;receiving a second signal from a second transmitter in the broadcast network in response to the step of comparing;sending the decoded data from first and the second signals to an application processor;buffering the first and second signals until a match between the first and second signals is achieved; andcontinuing to receive the first and second signals until the application processor terminates receiving one of the first and second signals in response to the match. 2. A method as in claim 1, wherein the first and second signals are orthogonal frequency division multiplex (OFDM) signals. 3. A method as in claim 1, wherein the broadcast network is a digital video broadcast network. 4. A method as in claim 1, wherein each of the first transmitter and the second transmitter comprise different cells of a multiple frequency network (MFN). 5. A method as in claim 1, wherein each of the first transmitter and the second transmitter comprise different cells of different multiple frequency networks (MFN). 6. A method as in claim 1, wherein the step of receiving a first signal comprises identifying a cell and a frequency of the first transmitter, and wherein the step of receiving a second signal comprises identifying a cell and a frequency of the second transmitter. 7. A method as in claim 1, wherein the application processor terminates receiving one of the first and second signals in response to receiving duplicate data signals. 8. A method as in claim 7, wherein the duplicate data signals comprise a plurality of data packets. 9. A method as in claim 8, wherein the application processor detects the duplicate data packets from the plurality of data packets and directs the wireless receiver to stop receiving one of the first and second signals. 10. A method as in claim 1, comprising selecting and maintaining a candidate set of frequencies for handover. 11. A method as in claim 10, wherein the selection of the candidate set is based on the frequencies given in the Network Information Table (NIT). 12. A method as in claim 11, wherein the candidate set is based on at least one of cell geographical information, cell size from the deployment, and a data stream with same service. 13. A method as in claim 10, wherein the first threshold adaptive at least one of a different modulation, coding scheme, the cell size, and maximum mobile speed. 14. A receiver for providing a handover in a broadcast network, comprising: a wireless receiver circuit arranged to receive a plurality of data signals from a respective plurality of remote transmitters in the broadcast network and to measure a received signal strength for each data signal or signal quality indicator; andan application processor circuit coupled to receive the plurality of data signals from the wireless receiver circuit, wherein the application processor buffers at least two of the plurality of signals until a match between the at least two of the plurality of signals is achieved, and wherein the application processor directs the wireless receiver to stop receiving one of the plurality of data signals in response to the match. 15. A receiver as in claim 14, wherein the plurality of data signals are orthogonal frequency division multiplex (OFDM) signals. 16. A receiver as in claim 14, wherein the broadcast network is a digital video broadcast network. 17. A receiver as in claim 14, wherein the plurality of remote transmitters comprises different cells of a multiple frequency network (MFN). 18. A receiver as in claim 14, wherein the plurality of remote transmitters comprises cells of different multiple frequency networks (MFN). 19. A receiver as in claim 14, wherein the wireless receiver comprises: a radio frequency (RF) front end coupled to an antenna;an analog-to-digital converter (ADC) coupled to the RF front end;an orthogonal frequency division multiplex (OFDM) demodulator coupled to the ADC; anda control processor coupled to the OFDM demodulator. 20. A receiver as in claim 19, comprising a power management circuit arranged to operate the wireless receiver circuit when a data signal is present and to place the wireless receiver in a low power mode at other times. 21. A receiver circuit as in claim 14, wherein the application processor comprises: a digital signal processor coupled to receive the plurality of data signals and decompress and decode them;a processor coupled to the digital signal processor to receive the plurality of data signals and assemble them in at least one contiguous video data stream; anda controller circuit arranged to receive the at least one contiguous data stream. 22. A receiver as in claim 14, wherein the receiver is a handheld receiver. 23. A receiver as in claim 14, wherein the application processor controls the wireless receiver. 24. A receiver as in claim 14, wherein the application processor directs the wireless receiver to stop receiving one of the plurality of data signals in response to receiving duplicate data signals. 25. A receiver as in claim 14, wherein the wireless receiver and the application processor are formed on different semiconductor integrated circuits.