Abstract
Narrowband remote units (101-103) scan over frequencies within a wideband channel spectrum evaluating frequency-selective channel characteristics. The best sub-channel(s) for communication is determined and reported back to a base station (104) via a channel-quality report message. The base station then utilizes only a narrowband portion for example one sub-channel comprised of a plurality of OFDM subcarriers of the wideband channel for transmitting data to the narrowband unit.
Narrowband remote units (101-103) scan over frequencies within a wideband channel spectrum evaluating frequency-selective channel characteristics. The best sub-channel(s) for communication is determined and reported back to a base station (104) via a channel-quality report message. The base station then utilizes only a narrowband portion for example one sub-channel comprised of a plurality of OFDM subcarriers of the wideband channel for transmitting data to the narrowband unit.
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| 4G | 16/12/2010 | ISLD-201101-007 | MOTOROLA INC |
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| 4G | 04/02/2020 | ISLD-202001-033 | GOOGLE INC |
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| 5G | 18/03/2022 | ISLD-202203-198 | GOOGLE INC |
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| US2005245258A1 | 4G | 16/12/2010 | ISLD-201101-007 | MOTOROLA INC |
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| US7047006B2 | 5G | 18/03/2022 | ISLD-202203-198 | GOOGLE INC |
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Channel Arrangement/Coding
Product
Not Available
Use Cases
Wireless communication
Services
Not Available
Claim
1. A method for a narrowband mobile unit to receive data in a wideband communication system, the method comprising the steps of: scanning within a wideband channel; evaluating frequency-selective channel characteristics for the wideband channel; sending a channel-quality report to a base station, wherein the channel- quality report is based on the frequency-selective channel characteristics for the wideband channel; receiving a channel assignment from the base station; and receiving data over a portion of the wideband channel based on the frequency-selective channel characteristics, wherein a data rate for the data is based predominantly on the frequency-selective channel characteristics for the wideband channel.
2. The method of claim 1 wherein the step of evaluating the frequency-selective channel characteristics for the wideband channel comprises the step of evaluating a frequency-selective channel characteristic taken from the group consisting of a received signal strength indicator (RSSI), a received carrier over noise ratio, a received carrier over interference, and a received carrier over noise plus interference.
3. The method of claim 1 wherein the step of sending the channel-quality report comprises the step of sending a list of preferred sub-channels or a list of subchannels to avoid.
4. The method of claim 1 wherein the step of receiving the channel assignment from the base station comprises at least one of receiving a narrowband channel assignment from the base station, wherein the narrowband channel occupies a portion of the wideband channel spectrum, receiving the channel assignment transmitted over the portion of the wideband channel, and receiving the channel assignment transmitted over a second portion of the wideband channel.
5. A method comprising the steps of: receiving a channel-quality report from a narrowband remote unit; determining a portion of a wideband channel to utilize for narrowband transmissions based on the channel-quality report; determining a modulation and coding for the narrowband transmissions based on the channel-quality report^ transmitting a channel assignment to the narrowband remote unit assigning the narrowband remote unit the portion of the wideband channel; and transmitting data to the narrowband remote unit over a narrowband channel comprising the portion of the wideband channel.
6. The method of claim 5 further comprising the step of: multiplexing data to a plurality of narrowband remote units over the narrowband channel.
7. The method of claim 5 further comprising the step of: simultaneously transmitting to a plurality of narrowband remote units over one of differing frames of the narrowband channel and differing narrowband channels.
8. The method of claim 5 further comprising the steps of: multiplexing data to the narrowband remote unit and a wideband remote unit within a same frame; and transmitting to the narrowband remote unit and the wideband remote unit within the same frame.
9. An apparatus comprising: channel scanning circuitry for scanning a wideband channel; logic circuitry for evaluating frequency-selective channel characteristics for the wideband channel; a transmitter for sending a channel -quality report to a base station, wherein the channel-quality report is based on the frequency-selective channel characteristics for the wideband channel; and a receiver receiving a channel assignment from the base station and receiving data over a portion of the wideband channel based on the channel- quality report, wherein the data rate for the data is based predominantly on the frequency-selective channel characteristics for the wideband channel
10. An apparatus comprising: receiving circuitry receiving a channel-quality report from a narrowband remote unit; logic circuitry for determining a portion of a wideband channel to utilize for narrowband transmissions based on the channel-quality report, the logic circuitry additionally determining a modulation and coding for the narrowband transmissions based on the channel-quality report; modulation and coding circuitry for modulating and coding the data to be transmitted to the narrowband remote unit; and transmitting circuitry for transmitting data to the narrowband remote unit over the portion of the wideband channel, the data having a modulation and coding based on the channel-quality report.']
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