METHOD AND APPARATUS FOR TRANSMITTING DATA

• US 20200137797A1
• Filed: 12/31/2019
• Published: 04/30/2020
• Est. Priority Date: 11/07/2014
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: WANG, Yi, SUN, Chengjun, LI, Yingyang
• Granted Patent: US 11,259,325 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 12/413 with random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD]
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 52/04 TPC
• CPC Class Codes: H04W 52/143 Downlink power control
• CPC Class Codes: H04W 52/245 taking into account received signal strength
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]

Abstract

Provided is a pre-5^th-Generation (5g) or 5G communication system for supporting higher data rates Beyond 4^th-Generation (4g) communication system such as Long Term Evolution (LTE). The present disclosure provides a method for transmitting data, including: performing, by a Long-Term Evolution (LTE) equipment, Clear Channel Assessment (CCA) in one channel of a unlicensed band; and determining, by the LTE equipment, whether the channel can be occupied according to a CCA measurement value in the channel, and determining a data transmission parameter if it is determined that the channel can be occupied. The present disclosure also provides a corresponding apparatus. According to the method and apparatus provided by the present disclosure, the transmission power of the apparatus on the unlicensed band may be controlled, channel seizing opportunity is increased and effective coexistence is ensured.

Claims

1. A method performed by a base station in a wireless communication system, the method comprising:

determining at least one energy detection threshold based on a signal to be transmitted;

sensing a channel of an unlicensed band during a predetermined time period;

determining whether the channel is idle based on detected power corresponding to the channel and the at least one energy detection threshold; and

transmitting the signal to a user equipment (UE) on a carrier based on the determination result.

2. The method of claim 1, wherein the at least one energy detection threshold is determined based on whether the signal to be transmitted includes a physical downlink shared channel (PDSCH) or a discovery signal.

3. The method of claim 2, wherein the PDSCH is not included in the signal including the discovery signal.

4. The method of claim 2, wherein determining the at least one energy detection threshold comprises:

determining at least one of a first energy detection threshold corresponding to the signal including the PDSCH or a second energy detection threshold corresponding to the signal including the discovery signal.

5. The method of claim 4, wherein the first energy detection threshold is less than the second energy detection threshold.

6. A base station in a wireless communication system, the base station comprising:

a transceiver; and

at least one processor coupled with the transceiver and configured to;

determine at least one energy detection threshold based on a signal to be transmitted,

sense a channel of an unlicensed band during a predetermined time period,

determine whether the channel is idle based on detected power corresponding to the channel and the at least one energy detection threshold, and

transmit the signal to a user equipment (UE) on a carrier based on the determination result.

7. The base station of claim 6, wherein the at least one processor is further configured to determine the at least one energy detection threshold based on whether the signal to be transmitted includes a physical downlink shared channel (PDSCH) or a discovery signal.

8. The base station of claim 7, wherein the PDSCH is not included in the signal including the discovery signal.

9. The base station of claim 7, wherein the at least one processor is further configured to determine at least one of a first energy detection threshold corresponding to the signal including the PDSCH or a second energy detection threshold corresponding to the signal including the discovery signal.

10. The base station of claim 9, wherein the first energy detection threshold is less than the second energy detection threshold.