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US 10,433,282 B2Granted
Narrow bandwidth operation in LTE
AssigneeQUALCOMM Incorporated
InventorsJuan Montojo, Jelena M. Damnjanovic, Hao Xu, Wanshi Chen, Peter Gaal
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Abstract
A method of wireless communication provides narrow bandwidth operation within a wider LTE system bandwidth. Wideband information is transmitted to a first set of user equipments (UEs). Also, narrowband information is transmitted to a second set of UEs. The second set of UEs operate in a narrower bandwidth than the first set of UEs.
Claims29
A method of wireless communication, comprising:
- transmitting wideband downlink information to a first set of user equipments (UEs), the wideband downlink information comprising control information and data;
- determining a starting symbol of an effective data region for narrowband downlink information for a second set of UEs, the starting symbol selected from a plurality of symbols, such that the starting symbol is semi-statically configured, and the starting symbol indicated to the second set of UEs prior to transmitting the narrowband downlink information;
- disabling intra-subframe hopping and/or inter-subframe hopping to maintain narrowband transmissions for the second set of UEs;
- and
- transmitting the narrowband downlink information to the second set of UEs operating in a narrower bandwidth than a bandwidth of the first set of UEs, the narrowband downlink information comprising control information and data.
2 more elements
An apparatus for wireless communication, comprising:
- a memory;
- and
- at least one processor coupled to the memory, the at least one processor being configured:
- to transmit wideband downlink information to a first set of user equipments (UEs), the wideband downlink information comprising control information and data;
- to determine a starting symbol of an effective data region for narrowband downlink information for a second set of UEs, the starting symbol selected from a plurality of symbols, such that the starting symbol is semi-statically configured, and the starting symbol indicated to the second set of UEs prior to transmitting the narrowband downlink information;
- to disable intra-subframe hopping and/or inter-subframe hopping to maintain narrowband transmissions for the second set of UEs;
- and
- to transmit the narrowband downlink information to the second set of UEs operating in a narrower bandwidth than a bandwidth of the first set of UEs, the narrowband downlink information comprising control information and data.
5 more elements
A method of wireless communication, comprising:
- determining a second type of reference signal for channel estimation for a second set of UEs;
- transmitting wideband downlink information, comprising a first type of reference signal for channel estimation, to a first set of user equipments (UEs), the wideband downlink information further comprising control information and data;
- disabling intra-subframe hopping and/or inter-subframe hopping to maintain narrowband transmissions for the second set of UEs;
- and
- transmitting narrowband downlink information comprising the second type of reference signal to the second set of UEs, the narrowband downlink information further comprising control information and data, the second set of UEs operating in a narrower bandwidth than a bandwidth of the first set of UEs, and the second type of reference signal being different than the first type of reference signal.
2 more elements
An apparatus for wireless communication, comprising:
- a memory;
- and
- at least one processor coupled to the memory, the at least one processor configured:
- to determine a second type of reference signal for channel estimation for a second set of UEs;
- to transmit wideband downlink information, comprising a first type of reference signal for channel estimation, to a first set of user equipments (UEs), the wideband downlink information further comprising control information and data;
- to disable intra-subframe hopping and/or inter-subframe hopping to maintain narrowband transmissions for the second set of UEs;
- and
- to transmit narrowband downlink information comprising the second type of reference signal to the second set of UEs, the narrowband downlink information further comprising control information and data, the second set of UEs operating in a narrower bandwidth than a bandwidth of the first set of UEs, and the second type of reference signal being different than the first type of reference signal.
5 more elements
A method of wireless communication at a first user equipment (UE) operating in a narrow bandwidth, comprising:
- receiving, from a base station, an indication of a starting symbol of an effective data region for narrowband downlink information, the starting symbol selected from a plurality of symbols, such that the starting symbol is semi-statically configured, and the narrowband downlink information comprises control information and data;
- and
- receiving the narrowband downlink information at the starting symbol, the narrow bandwidth narrower than a wide bandwidth of a second UE, in which intra-subframe hopping and/or inter-subframe hopping are disabled to maintain the narrow bandwidth.
A method of wireless communication at a first user equipment (UE) operating in a narrow bandwidth, comprising:
- receiving narrowband downlink information comprising a first type of reference signal, the narrowband downlink information further comprising control information and data, the narrow bandwidth narrower than a wide bandwidth of a second UE, and the first type of reference signal different than a second type of reference signal received at the second UE, in which intra-subframe hopping and/or inter-subframe hopping are disabled to maintain the narrow bandwidth;
- and
- performing channel measurements using the received first type of reference signal.
Dependencies are inferred from the claim text.