Method and apparatus for managing grant-free data transmission in radio communication network

Patent metadata

Field	Value
Publication number	US-11523429-B2
Application number	US-201815863911-A
Country	US
Kind code	B2
Filing date	Jan 6, 2018
Priority date	Jan 7, 2017
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

Embodiments herein provide a method and system for managing Grant-free data transmission in a radio communication network. The proposed method includes composing, by a Base Station (BS), a Select Signal (SS) for a transceiver device, where the SS is configured to control a grant-free data transmission from the transceiver device. Further, the proposed method includes transmitting, by the BS, the SS to the transceiver device. Further, the proposed method includes receiving, by a transceiver device, the SS from the BS. Further, the proposed method includes decoding, by the transceiver device, the SS and furthermore, the proposed method includes controlling, by the transceiver device, a data transmission by one of activating the grant-free data transmission from the transceiver device in response to successful decoding of the SS, and deactivating the grant-free data transmission from the transceiver device in response to unsuccessful decoding of the SS.

First claim

What is claimed is:

1. A method for managing a grant-free data transmission in a radio communication network, the method comprising:
composing, by a base station, at least one Select Signal (SS) for at least one transceiver device from a plurality of transceiver devices in the radio communication network, wherein the at least one SS is configured to control the grant-free data transmission from the at least one transceiver device, wherein the at least one SS comprises one of: at least one bit of information indicating an activation of the grant-free data transmission at the at least one transceiver device, and a plurality of bits of information indicating transmission parameters, wherein at least one bit from the plurality of bits indicates an activation of the grant-free data transmission at the at least one transceiver device;
transmitting, by the base station, the at least one SS comprising one of the at least one bit of information and the plurality of bits of information of the at least one SS to the at least one transceiver, wherein one of the at least one bit of information and the plurality of bits of information of the at least one SS is transmitted as at least one of a Radio Resource Control (RRC) signalling and a Layer 1 (L1) signalling;
receiving, by the at least one transceiver device, the at least one SS from the base station using at least one of the RRC signalling and the L1 signalling,
decoding, by the at least one transceiver device, the at least one SS;
activating, by the at least one transceiver device, the grant-free data transmission based on the at least one bit of the at least one SS indicating the activation of the grant-free data transmission at the at least one transceiver device, wherein the at least one transceiver device remains active until the deactivation of the grant-free transmission is indicated in the same SS;
performing, by the at least one transceiver device, the grant-free data transmission;
composing, by the base station, the at least one SS for the at least one transceiver device, wherein the at least one SS comprises one of: at least one bit of information indicating a deactivation of the grant-free data transmission at the at least one transceiver device, and a plurality of bits of information indicating transmission parameters, wherein at least one bit from the plurality of bits indicates a deactivation of the grant-free data transmission at the at least one transceiver device;
transmitting, by the base station, the at least one SS comprising to the at least one transceiver device, wherein the at least one SS is transmitted as at least one of a RRC signalling and a L1 signalling;
receiving, by the at least one transceiver device, the at least one SS from the base station using at least one of the RRC signalling and the L1 signalling,
decoding, by the transceiver device, the at least one SS; and
deactivating, by the at least one transceiver device, the grant-free data transmission based on the at least one bit of the at least one SS indicating the deactivation of the grant-free data transmission at the at least one transceiver device, wherein the at least one transceiver device remains deactive until the activation of the grant-free transmission is indicated in the same SS.

2. The method of claim 1 , wherein the grant-free data transmission from the at least one transceiver device comprises at least one of a fresh data transmission, a data retransmission and a Channel Quality Indicator (CQI) reporting.

3. The method of claim 1 , wherein the transmission parameters for at least one of a fresh data transmission and a data retransmission comprises at least one of:
at least one bit from the plurality of bits transmitted as at least one of the L1 signalling and the RRC signalling indicating one of an activation of the grant-free data transmission at the at least one transceiver device and a deactivation of the grant-free data transmission at the at least one transceiver device, and
at least one bit from the plurality of bits transmitted as at least one of the L1 signalling and the RRC signalling indicating at least one of a Modulation and Coding Scheme (MCS), a Resource Position (RP), a scheduling pattern, an orthogonal sequence, a resource allocation, a multiple access signature, a waveform configuration, a transmit power allocation, a number of retransmissions and retransmissions to defer.

4. The method of claim 1 , wherein transmission parameters for a CQI reporting comprises at least one of:
at least one bit from the plurality of bits indicating one of an activation of the grant-free data transmission at the at least one transceiver device and a deactivation of the grant-free data transmission at the at least one transceiver device for the grant-free data transmission which is transmitted as at least one of the L1 signalling and the RRC signalling, and
at least one bit from the plurality of bits comprises at least one of a transmit power information, a reference signal information, a sub-band information, a CQI type, and a measurement configuration which is transmitted as at least one of the L1 signalling and the RRC signalling.

5. The method of claim 1 , wherein the transmission parameters are dynamically one of configured and reconfigured based on at least one of the L1 signalling and the RRC signalling.

6. The method of claim 1 , wherein the transmission parameters are dynamically determined based on a type of the grant-free data transmission intended by the at least one transceiver device, and wherein the type of the grant-free data transmission is at least one of a fresh data transmission, a data retransmission and a CQI reporting.

7. The method of claim 1 , wherein composing by the base station the at least one SS for the at least one transceiver device comprises:
receiving a preamble sequence from the at least one transceiver device; and
composing the at least one SS for a fresh data transmission at the at least one transceiver device without grant based on the preamble sequence.

8. The method of claim 1 , wherein the at least one SS is transmitted by performing one of a SS key encryption and a cyclic redundancy check (CRC) sequence scrambling by using one of a transceiver identifier and a transceiver group identifier.

9. The method of claim 1 , wherein composing by the base station the at least one SS for the at least one transceiver device comprises:
receiving at least one fresh data transmission from the at least one transceiver device; and
composing the at least one SS for the data retransmission without grant from the at least one transceiver device based on the at least one fresh data transmission.

10. The method of claim 1 , wherein the grant-free data transmission is performed at the at least one transceiver device based on the transmission parameter from the at least one SS.

11. The method of claim 1 , wherein the at least one SS is decoded by the at least one transceiver device intended to perform the grant-free data transmission at a pre-determined time interval.

12. The method of claim 1 , wherein decoding at least one SS comprises performing one of a SS key decryption and a cyclic redundancy check (CRC) sequence descrambling using on one of a transceiver identifier of the transceiver device and a group identifier for the at least one transceiver device.

13. The method of claim 1 , wherein the at least one bit indicating the activation in the at least one SS signal and the at least one bit indicating deactivation in the at least one SS signal is one of same and different.

14. A system base station for managing a grant-free data transmission in a radio communication

Assignees

• Centre Of Excellence In Wireless Tech
• Indian Inst Tech Madras
• Centre Of Excellence In Wireless Tech Cewit
• Indian Institute Of Tech Madras

Inventors

• Srinivasan Nithin
• Baskaran Dhivagar
• Mohandoss Chandrasekaran
• Kaimalettu Sunil
• Milleth Jeniston Deviraj Klutto
• Ramamurthi Bhaskar

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W74/006

  in the downlink, i.e. towards the terminal · CPC title

• H04W76/27

  Transitions between radio resource control [RRC] states · CPC title

• H04L1/1812 Primary

  Hybrid protocols; Hybrid automatic repeat request [HARQ] · CPC title

• H04W40/12

  based on transmission quality or channel quality · CPC title