Abstract
Synchronized broadcast transmits a same broadcast content using a same waveform from multiple transmitters. Transmitters each apply a same spreading code for broadcast transmissions. In a spread-spectrum communication system having a time division multiplexed forward link, a synchronized broadcast transmission is inserted into a broadcast slot. One embodiment employs an Orthogonal Frequency Divisional Multiplex (OFDM) waveform for the synchronized broadcast. An OFDM receiver is then used to process the received synchronized broadcast transmission. An alternate embodiment implements a broadcast Pseudo-random Noise (PN) code for use by multiple transmitters. An equalizer is then employed to estimate the synchronized broadcast transmission.
| Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
|---|---|---|---|---|---|---|---|---|---|
| Declaration Date | Declaration Reference | Declaring Company | Specification Number | ||||||
| 3G | 02/03/2010 | ISLD-201004-005 | QUALCOMM INC | No | Family Member | ||||
| Not Available | 02/03/2010 | ISLD-201004-005 | QUALCOMM INC | No | Family Member | ||||
| 4G | 29/01/2017 | ISLD-201703-174 | QUALCOMM INC |
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No | Family Member | |||
| 4G | 12/03/2020 | ISLD-202003-022 | QUALCOMM INC | Yes | Basis Patent | ||||
| 5G | 31/05/2022 | ISLD-202205-072 | QUALCOMM INC | No | Family Member | ||||
Specification Information
Specification Information
Technologies
Family Information
| All Granted Patents In Patent Family : | ---- |
| All Pending Patents In Patent Family : | ---- |
| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Declaration Date | Declaration Reference | Declaring Company | Specification Number | |||||||
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No | Family Member | |||
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No | Family Member | |||
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No | Family Member | |||
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No | Family Member | |||
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No | Family Member | |||
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No | Family Member | |||
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No | Family Member | |||
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No | Family Member | |||
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S1
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Yes | Basis Patent | |||
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S1
S2
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Yes | Basis Patent | |||
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S1
S2
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No | Family Member | |||
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S1
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No | Family Member | |||
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No | Family Member | |||
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No | Family Member | |||
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S1
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S1
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No | Family Member | |||
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S1
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No | Family Member | |||
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S1
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S1
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No | Family Member | |||
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S1
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No | Family Member | |||
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No | Family Member | |||
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Declaration Date | Declaration Reference | Declaring Company | Specification Information | |||||||||
| ----- | ----- | ----- | ----- | ----- |
S1
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----- | ----- | ----- | ----- | |||
Technologies
Broadcast/Multicast
Product
Use Cases
Wireless communication
Services
Claim
1. A computer-implemented method of synchronized broadcast transmission in a spread-spectrum communication system, the method comprising:
spreading, by a first transmitter of a base station, unicast information using a first spreading code specific to the first transmitter; and
time-synchronized spreading, by the first transmitter with respect to at least a second transmitter, broadcast information using a broadcast spreading code common to the first transmitter and the at least second transmitter, wherein the broadcast information is the same for the first transmitter and the at least second transmitter; and
transmitting in synchronization the broadcast information from the first transmitter and the at least second transmitter.', 'spreading, by a first transmitter of a base station, unicast information using a first spreading code specific to the first transmitter; and', 'time-synchronized spreading, by the first transmitter with respect to at least a second transmitter, broadcast information using a broadcast spreading code common to the first transmitter and the at least second transmitter, wherein the broadcast information is the same for the first transmitter and the at least second transmitter; and', 'transmitting in synchronization the broadcast information from the first transmitter and the at least second transmitter.
2. The computer-implemented method of claim 1, wherein transmitting the broadcast information includes transmitting a transmission having a plurality of time slots, the transmission comprising a plurality of code division modulated slots and a synchronized broadcast slot that includes the broadcast information.
3. The computer-implemented method of claim 2, wherein the plurality of code division modulated slots include the unicast information.
4. The computer-implemented method of claim 3, wherein the broadcast information is transmitted using orthogonal frequency division modulation.
5. The computer-implemented method of claim 1, wherein transmitting in synchronization the broadcast information comprises transmitting information from the first transmitter and the at least second transmitter in at least one time slot.
6. The computer-implemented method of claim 1, further comprising multiplexing the broadcast information and the unicast information into one transmission time slot.
7. The computer-implemented method of claim 6, wherein the one transmission time slot includes a broadcast pilot.
8. The computer-implemented method of claim 1, wherein the broadcast information is transmitted at least in part during an interlace reserved for broadcast transmissions.
9. The computer-implemented method of claim 8, wherein the broadcast information includes one or more physical layer packets transmitted by the first transmitter and by the second transmitter during the interlace
10. The computer-implemented method of claim 1, wherein the broadcast spreading code is a pseudonoise (PN) code
11. A receiver compatible with a spread-spectrum communication system, the receiver comprising:
means for receiving unicast information spread using a first spreading code specific to a first transmitter of a base station that transmitted the unicast information and further for receiving broadcast information from the first transmitter and at least a second transmitter, the at least second transmitter transmitting the broadcast information in synchronization with the first transmitter, the broadcast information spread using a time synchronized broadcast spreading code common to the first transmitter and to the at least second transmitter; and
a demodulation controller coupled to the means for receiving.', 'means for receiving unicast information spread using a first spreading code specific to a first transmitter of a base station that transmitted the unicast information and further for receiving broadcast information from the first transmitter and at least a second transmitter, the at least second transmitter transmitting the broadcast information in synchronization with the first transmitter, the broadcast information spread using a time synchronized broadcast spreading code common to the first transmitter and to the at least second transmitter; and', 'a demodulation controller coupled to the means for receiving
12. The receiver of claim 11, further comprising:
means for demodulating unicast transmissions including the unicast information; and
means for demodulating broadcast transmissions including the broadcast information,
wherein the demodulation controller comprises means for selecting the means for demodulating unicast transmissions or the means for demodulating broadcast transmissions in response to a type of information received.', 'means for demodulating unicast transmissions including the unicast information; and', 'means for demodulating broadcast transmissions including the broadcast information,', 'wherein the demodulation controller comprises means for selecting the means for demodulating unicast transmissions or the means for demodulating broadcast transmissions in response to a type of information received
13. The receiver of claim 12, wherein the means for demodulating unicast transmissions is configured to demodulate code division modulated information
14. The receiver of claim 12, wherein the means for demodulating broadcast transmissions is configured to demodulate orthogonal frequency division modulated information
15. The receiver of claim 11, wherein the means for receiving the unicast information and for receiving the broadcast information is compatible with a time division multiplex forward link format
16. The receiver of claim 11, wherein the means for receiving is configured to receive a first transmission slot, wherein the first transmission slot includes the broadcast information modulated using a first modulation format and further includes a unicast portion including the unicast information modulated using a second modulation format, wherein the first and second modulation formats are different, and further comprising:
means for demodulating the unicast portion; and
means for demodulating the broadcast portion,
wherein the demodulation controller comprises means for selecting, in response to a type of information received, the means for demodulating the unicast portion or the means for demodulating the broadcast portion.', 'means for demodulating the unicast portion; and', 'means for demodulating the broadcast portion,', 'wherein the demodulation controller comprises means for selecting, in response to a type of information received, the means for demodulating the unicast portion or the means for demodulating the broadcast portion
17. The receiver of claim 16, wherein the first modulation format comprises an orthogonal frequency division modulation format
18. The receiver of claim 16, wherein the second modulation format comprises a code division modulation format
19. The receiver of claim 16, wherein the first modulation format comprises a code division modulation format corresponding to a broadcast spreading code used by multiple transmitters.
20. The receiver of claim 16, wherein the means for demodulating the broadcast portion comprises means for equalizing the broadcast portion.
21. The receiver of claim 20, wherein the means for equalizing the broadcast portion comprises means for training an equalizer using a broadcast pilot of the broadcast portion.
22. An apparatus, comprising:
a first transmitter of a base station, the first transmitter configured to:
spread unicast information using a first spreading code specific to the first transmitter; and
time-synchronized spread, by the first transmitter with respect to at least a second transmitter, broadcast information using a broadcast spreading code common to the first transmitter and the at least second transmitter, wherein the broadcast information is the same for the first transmitter and the at least second transmitter; and
transmit in synchronization the broadcast information from the first transmitter and the at least second transmitter.', 'a first transmitter of a base station, the first transmitter configured to:
spread unicast information using a first spreading code specific to the first transmitter; and
time-synchronized spread, by the first transmitter with respect to at least a second transmitter, broadcast information using a broadcast spreading code common to the first transmitter and the at least second transmitter, wherein the broadcast information is the same for the first transmitter and the at least second transmitter; and
transmit in synchronization the broadcast information from the first transmitter and the at least second transmitter.', 'spread unicast information using a first spreading code specific to the first transmitter; and', 'time-synchronized spread, by the first transmitter with respect to at least a second transmitter, broadcast information using a broadcast spreading code common to the first transmitter and the at least second transmitter, wherein the broadcast information is the same for the first transmitter and the at least second transmitter; and', 'transmit in synchronization the broadcast information from the first transmitter and the at least second transmitter.
23. The apparatus of claim 22, wherein the first transmitter is further configured to transmit the broadcast information by transmitting a transmission having a plurality of time slots, the transmission comprising a plurality of code division modulated slots and a synchronized broadcast slot that includes the broadcast information.
24. The apparatus of claim 23, wherein the unicast information is transmitted in the plurality of code division modulated slots.
25. The apparatus of claim 23, wherein the broadcast information is transmitted using orthogonal frequency division modulation.
26. The apparatus of claim 22, wherein transmitting in synchronization the broadcast information comprises transmitting information from the first transmitter and the at least second transmitter in at least one time slot.
27. A non-transitory computer readable medium comprising instructions operable, when executed by a processor, to cause the processor to:
receive unicast information spread using a first spreading code specific to a first transmitter of a base station; and
receive broadcast information from the first transmitter and at least a second transmitter, the at least second transmitter transmitting the broadcast information in synchronization with the first transmitter, the broadcast information spread using a time synchronized broadcast spreading code common to the first transmitter and to the at least second transmitter.', 'receive unicast information spread using a first spreading code specific to a first transmitter of a base station; and', 'receive broadcast information from the first transmitter and at least a second transmitter, the at least second transmitter transmitting the broadcast information in synchronization with the first transmitter, the broadcast information spread using a time synchronized broadcast spreading code common to the first transmitter and to the at least second transmitter.
28. The non-transitory computer readable medium of claim 27, wherein the instructions are further operable, when executed by the processor, to cause the processor to:
demodulate unicast transmissions; and
demodulate broadcast transmissions.', 'demodulate unicast transmissions; and', 'demodulate broadcast transmissions.
29. The non-transitory computer readable medium of claim 27, wherein the instructions are further operable, when executed by the processor, to cause the processor to estimate received information.
30. The non-transitory computer readable medium of claim 29, wherein the instructions are further operable, when executed by the processor, to cause the processor to:
identify a broadcast pilot signal; and
equalize the received broadcast information using the broadcast pilot signal.', 'identify a broadcast pilot signal; and', 'equalize the received broadcast information using the broadcast pilot signal.
31. The non-transitory computer readable medium of claim 30, wherein the instructions are further operable, when executed by the processor, to cause the processor to equalize the received broadcast information and to equalize the received unicast information.
32. The non-transitory computer readable medium of claim 27, wherein the processor is further configured to demodulate code division modulated information.
33. The non-transitory computer readable medium of claim 27, wherein the processor is further configured to demodulate orthogonal frequency division modulated information.']
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SUMMARY
ClaimChart-US8582621B2-STO
Patent number:US8582621B2
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.