CHANNEL RESERVATION METHOD FOR UNLICENSED BAND COMMUNICATION BASE STATION AND USER TERMINAL

Abstract

The present invention provides an uplink channel reservation method used in a mobile communication system supporting an unlicensed carrier as well as a base station and a user terminal that execute the method. The method includes: assessing whether an unlicensed carrier resource is free; and sending a channel reservation signal over the assessed free unlicensed carrier resource. According to embodiments of the present invention it is ensured that an unlicensed carrier resource remains free during the period from the time when an unlicensed carrier is assessed to be free to the time when an uplink license is issued and comes into effect.

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Technology	Declaration Information			Specification Information				Explicitly Disclosed	Patent Type
Technology	Declaration Date	Declaration Reference	Declaring Company	Specification Number				Explicitly Disclosed	Patent Type
5G	26/08/2020	ISLD-202008-013	SHARP CORPORATION	S1 TS Number: TS 138 201 Version No: Illustrative part: ---- Release: S2 TS Number: TS 138 202 Version No: Illustrative part: ---- Release: S3 TS Number: TS 138 211 Version No: Illustrative part: ---- Release: S4 TS Number: TS 138 212 Version No: Illustrative part: ---- Release: S5 TS Number: TS 138 213 Version No: Illustrative part: ---- Release: S6 TS Number: TS 138 214 Version No: Illustrative part: ---- Release: S7 TS Number: TS 138 215 Version No: Illustrative part: ---- Release: S8 TS Number: TS 138 300 Version No: Illustrative part: ---- Release: S9 TS Number: TS 138 304 Version No: Illustrative part: ---- Release: S10 TS Number: TS 138 305 Version No: Illustrative part: ---- Release: S11 TS Number: TS 138 306 Version No: Illustrative part: ---- Release: S12 TS Number: TS 138 307 Version No: Illustrative part: ---- Release: S13 TS Number: TS 138 314 Version No: Illustrative part: ---- Release: S14 TS Number: TS 138 321 Version No: Illustrative part: ---- Release: S15 TS Number: TS 138 322 Version No: Illustrative part: ---- Release: S16 TS Number: TS 138 323 Version No: Illustrative part: ---- Release: S17 TS Number: TS 138 331 Version No: Illustrative part: ---- Release: S18 TS Number: TS 138 340 Version No: Illustrative part: ---- Release: +17 -17				Yes	Basis Patent

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2G 3G 4G 5G

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Publication No	Technology	Declaration Information			Specification Information	Explicitly Disclosed	Patent Type
Publication No	Technology	Declaration Date	Declaration Reference	Declaring Company	Specification Number	Explicitly Disclosed	Patent Type
CN105827379A	5G	26/08/2020	ISLD-202008-013	SHARP CORPORATION	S1 TS Number: TS 138 201 Version No: ---- Section No: Release : ---- S2 TS Number: TS 138 202 Version No: ---- Section No: Release : ---- S3 TS Number: TS 138 211 Version No: ---- Section No: Release : ---- S4 TS Number: TS 138 212 Version No: ---- Section No: Release : ---- S5 TS Number: TS 138 213 Version No: ---- Section No: Release : ---- S6 TS Number: TS 138 214 Version No: ---- Section No: Release : ---- S7 TS Number: TS 138 215 Version No: ---- Section No: Release : ---- S8 TS Number: TS 138 300 Version No: ---- Section No: Release : ---- S9 TS Number: TS 138 304 Version No: ---- Section No: Release : ---- S10 TS Number: TS 138 305 Version No: ---- Section No: Release : ---- S11 TS Number: TS 138 306 Version No: ---- Section No: Release : ---- S12 TS Number: TS 138 307 Version No: ---- Section No: Release : ---- S13 TS Number: TS 138 314 Version No: ---- Section No: Release : ---- S14 TS Number: TS 138 321 Version No: ---- Section No: Release : ---- S15 TS Number: TS 138 322 Version No: ---- Section No: Release : ---- S16 TS Number: TS 138 323 Version No: ---- Section No: Release : ---- S17 TS Number: TS 138 331 Version No: ---- Section No: Release : ---- S18 TS Number: TS 138 340 Version No: ---- Section No: Release : ---- +17 -17	Yes	Family Member
WO2016110197A1	5G	26/08/2020	ISLD-202008-013	SHARP CORPORATION	S1 TS Number: TS 138 201 Version No: ---- Section No: Release : ---- S2 TS Number: TS 138 202 Version No: ---- Section No: Release : ---- S3 TS Number: TS 138 211 Version No: ---- Section No: Release : ---- S4 TS Number: TS 138 212 Version No: ---- Section No: Release : ---- S5 TS Number: TS 138 213 Version No: ---- Section No: Release : ---- S6 TS Number: TS 138 214 Version No: ---- Section No: Release : ---- S7 TS Number: TS 138 215 Version No: ---- Section No: Release : ---- S8 TS Number: TS 138 300 Version No: ---- Section No: Release : ---- S9 TS Number: TS 138 304 Version No: ---- Section No: Release : ---- S10 TS Number: TS 138 305 Version No: ---- Section No: Release : ---- S11 TS Number: TS 138 306 Version No: ---- Section No: Release : ---- S12 TS Number: TS 138 307 Version No: ---- Section No: Release : ---- S13 TS Number: TS 138 314 Version No: ---- Section No: Release : ---- S14 TS Number: TS 138 321 Version No: ---- Section No: Release : ---- S15 TS Number: TS 138 322 Version No: ---- Section No: Release : ---- S16 TS Number: TS 138 323 Version No: ---- Section No: Release : ---- S17 TS Number: TS 138 331 Version No: ---- Section No: Release : ---- S18 TS Number: TS 138 340 Version No: ---- Section No: Release : ---- +17 -17	Yes	Family Member

Publication No	Technology	Declaration Information			Specification Information				Explicitly Disclosed	Patent Type	Status	National Phase Entries
Publication No	Technology	Declaration Date	Declaration Reference	Declaring Company	Specification Information				Explicitly Disclosed	Patent Type	Status	National Phase Entries
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Technologies

Resource configuration

Product

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Use Cases

Wireless communication

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Not Available

Claim

1. An uplink channel reservation method used in a mobile communication system supporting an unlicensed carrier, comprising the steps of:
assessing whether an unlicensed carrier resource is free; and sending a channel reservation signal over the assessed free unlicensed carrier resource.
2. The method according to claim 1, wherein the method is executed by a base station or a user terminal.
3. The method according to claim 1, wherein a signal format of the channel reservation signal comprises a signal format of one of the following signals: an assessment reference signal, a synchronizing signal, and a demodulation reference signal.
4. The method according to claim 1, wherein the mobile communication system comprises a Long Term Evolution (LTE) system and a Long Term Evolution Advanced (LTE-A) system.
5. The method according to claim 1, further comprising: setting a timer, the timer being indicative of a maximum time of duration for sending the channel reservation signal, wherein the channel reservation signal continues being sent until uplink transmission begins or until the timer expires.
6. The method according to claim 1, wherein the step of assessment is initiated randomly.
7. The method according to claim 1, wherein the step of assessment is initiated according to an uplink scheduling license.
8. The method according to claim 1, wherein the assessment is executed during the period of a Free Channel Assessment (CCA) symbol.
9. The method according to claim 8, wherein the step of sending comprises: starting to send the channel reservation signal over the assessed free unlicensed carrier resource from a first Orthogonal Frequency Division Multiplexing (OFDM) symbol after the CCA symbol.
10. The method according to claim 1, wherein the assessment is executed during the period of a CCA symbol of a current sub-frame that decides to perform uplink transmission over the unlicensed carrier resource.
11. The method according to claim 1, wherein the assessment is executed during the period of a CCA symbol of an Mth sub-frame after a corresponding sub-frame for sending the uplink scheduling license, M being a positive integer greater than or equal to 1.
12. The method according to claim 7, further comprising: performing uplink transmission over the assessed free unlicensed carrier resource, wherein a terminal for executing the uplink transmission is a user terminal for executing the step of assessment, or other user terminals accessing the present cell.
13. A base station, comprising:
an assessment module, configured to assess whether an unlicensed carrier resource is free; and a sending module, configured to send a channel reservation signal over the assessed free unlicensed carrier resource.
14. The base station according to claim 13, wherein the base station supports a Long Term Evolution (LTE) or Long Term Evolution Advanced (LTE-A) standard.
15. The base station according to claim 13, further comprising: a timer, the timer being indicative of a maximum time of duration for sending the channel reservation signal,
wherein the sending module is further configured to continue sending the channel reservation signal until uplink transmission begins or until the timer expires.
16. The base station according to claim 13, wherein the assessment module is configured to randomly initiate the assessment.
17. The base station according to claim 13, wherein the assessment module is configured to make a decision according to an uplink scheduling license, and initiate the assessment at a specified time before or after a moment when the base station sends the uplink scheduling license.
18. The base station according to claim 13, wherein the assessment module is configured to execute the assessment during the period of a Free Channel Assessment (CCA) symbol.
19. The base station according to claim 18, wherein the sending module is further configured to start to send the channel reservation signal over the assessed free unlicensed carrier resource from a first Orthogonal Frequency Division Multiplexing (OFDM) symbol after the CCA symbol.
20. The base station according to claim 13, wherein the assessment module is further configured to execute the assessment during the period of a CCA symbol of a current sub-frame that decides to perform uplink transmission over the unlicensed carrier resource.
21. The base station according to claim 13, wherein the assessment module is further configured to execute the assessment during the period of a CCA symbol of a next frame with respect to a sub-frame for sending the uplink scheduling license.
22. A user terminal, comprising:
an assessment module, configured to assess whether an unlicensed carrier resource is free; and a sending module, configured to send a channel reservation signal over the assessed free unlicensed carrier resource.
23. The user terminal according to claim 22, wherein a signal format of the channel reservation signal comprises a signal format of one of the following signals: an assessment reference signal, a synchronizing signal, and a demodulation reference signal.
24. The user terminal according to claim 22, wherein the user terminal supports a Long Term Evolution (LTE) or Long Term Evolution Advanced (LTE-A) standard.
25. The user terminal according to claim 22, wherein the sending module is further configured to:
set a timer, the timer being indicative of a maximum time of duration for sending the channel reservation signal; and continue sending the channel reservation signal until uplink transmission begins or until the timer expires.
26. The user terminal according to claim 22, wherein the assessment module is configured to randomly initiate the assessment.
27. The user terminal according to claim 22, wherein the assessment module is configured to initiate, in response to an uplink scheduling license, the assessment.
28. The user terminal according to claim 22, wherein the assessment module is configured to execute the assessment during the period of a Free Channel Assessment (CCA) symbol.
29. The user terminal according to claim 28, wherein the sending module is further configured to start to send the channel reservation signal over the assessed free unlicensed carrier resource from a first Orthogonal Frequency Division Multiplexing (OFDM) symbol after the CCA symbol.
30. The user terminal according to claim 22, wherein the assessment module is further configured to execute the assessment during the period of a CCA symbol of a current sub-frame that decides to perform uplink transmission over the unlicensed carrier resource.
31. The user terminal according to claim 22, wherein the assessment module is further configured to execute the assessment during the period of a CCA symbol of an Mth sub-frame after a corresponding sub-frame for sending the uplink scheduling license, M being a positive integer greater than or equal to 1.
32. The user terminal according to claim 31, further comprising: a data sending module, configured to start to perform uplink transmission over an unlicensed carrier channel through an M+1th sub-frame after a corresponding sub-frame for sending the uplink scheduling license.

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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)

The information in grey was provided by the patent holder

The information in purple was extracted from the FrandAvenue

Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.

Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.

Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.

Family member:related patents or applications that share a common priority or original filing.