Reference Signal Allocation for Flexible Data Lengths
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsRobert Baldemair, Ning He
Life of this patent
Estimating the term…
Abstract
Physical layer characteristics, e.g., reference signal density, reference signal distribution, data parameters, etc., are defined in the physical layer for sub-frames of a transmission time interval (TTI) allocated to data packet(s) based on the number of allocated sub-frames. The flexibility provided by the solution presented herein enables the associated wireless system to better define those physical layer characteristics necessary to meet signal quality and system requirements without unnecessarily overburdening the system overhead. Thus, the reference signal overhead may be reduced, which leads to reduced system overhead and/or increased spectrum efficiency.
Claims25
1-25. (canceled)
A method of transmitting data from a wireless communication device to a remote device using one or more allocated sub-frames of a transmission time interval (TTI), the method comprising:
- allocating one or more sub-frames to a data packet;
- defining one or more physical layer characteristics of the allocated sub-frames based on the number of allocated sub-frames, wherein the one or more physical layer characteristics comprise at least one of:
- a reference signal density identifying a number of reference signals allocated to the data packet in response to the number of allocated sub-frames, the reference signal density varying disproportionately relative to the number of allocated sub-frames as the number of allocated sub-frames varies;
- a sub-frame structure identifying a distribution of one or more reference signals within the data packet in response to the number of allocated sub-frames;
- and
- a data rate parameter identifying at least one of a coding rate and a rate matching of the data packet in response to the number of allocated sub-frames, the data rate parameter varying relative to the number of allocated sub-frames;
- and
- transmitting, from the wireless communication device, the data packet according to the defined physical layer characteristics in the one or more allocated sub-frames.
A wireless communication device configured to transmit data using one or more allocated sub-frames of a transmission time interval (TTI), the wireless communication device comprising:
- an allocation circuit configured to allocate one or more sub-frames to a data packet;
- a resource defining circuit configured to define one or more physical layer characteristics of the allocated sub-frames based on the number of allocated sub-frames, wherein the one or more physical layer characteristics comprise at least one of:
- a reference signal density identifying a number of reference signals allocated to the data packet in response to the number of allocated sub-frames, the reference signal density varying disproportionately relative to the number of allocated sub-frames as the number of allocated sub-frames varies;
- a sub-frame structure identifying a distribution of one or more reference signals within the data packet in response the number of allocated sub-frames;
- and
- a data rate parameter identifying at least one of a coding rate and a rate matching of the data packet in response to the number of allocated sub-frames, the data rate parameter varying relative to the number of allocated sub-frames;
- and
- a transmitter configured to transmit the data packet according to the defined physical layer characteristics in the one or more allocated sub-frames.
A wireless communication device configured to transmit data using one or more allocated sub-frames of a transmission time interval (TTI), the wireless communication device comprising:
- memory;
- one or more processing circuits operatively connected to the memory and configured to allocate one or more sub-frames to a data packet by:
- defining one or more physical layer characteristics of the allocated sub-frames based on the number of allocated sub-frames, wherein the one or more physical layer characteristics comprise at least one of:
- a reference signal density identifying a number of reference signals allocated to the data packet in response to the number of allocated sub-frames, the reference signal density varying disproportionately relative to the number of allocated sub-frames as the number of allocated sub-frames varies;
- a sub-frame structure identifying a distribution of one or more reference signals within the data packet in response to the number of allocated sub-frames;
- and
- a data rate parameter identifying at least one of a coding rate and a rate matching of the data packet in response to the number of allocated sub-frames, the data rate parameter varying relative to the number of allocated sub-frames;
- a transmitter configured to transmit the data packet according to the defined physical layer characteristics in the one or more allocated sub-frames.
A computer program product stored in a non-transitory computer readable medium for controlling transmission of data from a wireless communication device to a remote device using one or more allocated sub-frames of a transmission time interval (TTI), the computer program product comprising software instructions which, when run on one or more processing circuits of the wireless communications device, causes the wireless communications device to:
- allocate one or more sub-frames to a data packet;
- define one or more physical layer characteristics of the allocated sub-frames based on the number of allocated sub-frames, wherein the one or more physical layer characteristics comprise at least one of:
- a reference signal density identifying a number of reference signals allocated to the data packet in response to the number of allocated sub-frames, the reference signal density varying disproportionately relative to the number of allocated sub-frames as the number of allocated sub-frames varies;
- a sub-frame structure identifying a distribution of one or more reference signals within the data packet in response to the number of allocated sub-frames;
- and
- a data rate parameter identifying at least one of a coding rate and a rate matching of the data packet in response to the number of allocated sub-frames, the data rate parameter varying relative to the number of allocated sub-frames;
- and
- transmit, from the wireless communication device, the data packet according to the defined physical layer characteristics in the one or more allocated sub-frames.
Dependencies are inferred from the claim text.