Method and apparatus for transmitting data
AssigneeLG Electronics Inc.
InventorsYunjung Yi, Joonkui Ahn, Dongyoun Seo
Life of this patent
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Abstract
The present invention relates to a method and apparatus for transmitting data. The method for a terminal to receive downlink data includes the steps of: receiving resource allocation information from a base station; and demodulating the downlink data transmitted through a sub-resource allocation unit allocated on the basis of the resource allocation information, wherein the sub-resource allocation unit is a plurality of resource units included in one resource allocation unit and the downlink data can be demodulated on the basis of a demodulation reference signal (DM_RS).
Claims6
A method for a terminal to receive downlink data, the method comprising:
- receiving resource allocation information from a base station;
- and
- demodulating downlink data transmitted through a sub-resource allocation unit allocated based on the resource allocation information,
- wherein a resource allocation unit includes the sub-resource allocation unit and an additional sub-resource allocation unit,
- wherein the resource allocation unit is a physical resource block (PRB),
- wherein the PRB includes seven orthogonal frequency division multiplexing (OFDM) symbols and 12 subcarriers,
- wherein the sub-resource allocation unit includes a resource for a first demodulation-reference signal (DM-RS),
- wherein the additional sub-resource allocation unit includes a resource for a second DM-RS,
- wherein the first DM-RS is generated based on a first DM-RS sequence,
- wherein the second DM-RS is generated based on a second DM-RS sequence,
- wherein a pattern of the first DM-RS is determined based on the first DM-RS sequence,
- wherein a pattern of the second DM-RS is determined based on the second DM-RS sequence, and
- wherein an initial value of a pseudo random sequence for generating each of the first DM-RS sequence and the second DM-RS sequence is determined as follows:
- cinit=(└ns/2┘+1)·(2nID,iEPDCCH+1)·216+nSCIDEPDCCH+k,
- where nSCIDEPDCCH=2;
- nID,iEPDCCH is determined by an upper layer;
- ns is a slot index;
- and k is determined by an index of the sub-resource allocation unit when the initial value of the pseudo random sequence is for the first DM-RS and the k is determined by an index of the additional sub-resource allocation unit when the initial value of the pseudo random sequence is for the second DM-RS.
A terminal for receiving downlink data in a wireless communication system, the terminal comprising:
- a radio frequency (RF) unit configured to transmit or receive a radio signal;
- and
- a processor operatively connected to the RF unit and configured to:
- receive resource allocation information from a base station, and
- demodulate downlink data transmitted through a sub-resource allocation unit allocated on the basis of the resource allocation information,
- wherein a resource allocation unit includes the sub-resource allocation unit and an additional sub-resource allocation unit,
- wherein the resource allocation unit is a physical resource block (PRB),
- wherein the PRB includes seven orthogonal frequency division multiplexing (OFDM) symbols and 12 subcarriers,
- wherein the sub-resource allocation unit includes a resource for a first demodulation-reference signal (DM-RS),
- wherein the additional sub-resource allocation unit includes a resource for a second DM-RS,
- wherein the first DM-RS is generated based on a first DM-RS sequence,
- wherein the second DM-RS is generated based on a second DM-RS sequence,
- wherein a pattern of the first DM-RS is determined based on the first DM-RS sequence,
- wherein a pattern of the second DM-RS is determined based on the second DM-RS sequence, and
- wherein an initial value of a pseudo random sequence for generating each of the first DM-RS sequence and the second DM-RS sequence is determined as follows:
- cinit=(└ns/2┘+1)·(2nID,iEPDCCH+1)·216+nSCIDEPDCCH+k,
- where nSCIDEPDCCH=2;
- nID,iEPDCCH is determined by an upper layer;
- ns is a slot index;
- and k is determined by an index of the sub-resource allocation unit when the initial value of the pseudo random sequence is for the first DM-RS and the k is determined by an index of the additional sub-resource allocation unit when the initial value of the pseudo random sequence is for the second DM-RS.
Dependencies are inferred from the claim text.