SYSTEMS AND METHODS FOR GRANT-FREE UPLINK TRANSMISSIONS

• US 20180139774A1
• Filed: 05/05/2017
• Published: 05/17/2018
• Est. Priority Date: 11/15/2016
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: MA, JIANGLEI, ZHANG, LIQING, CAO, YU
• Granted Patent: US 10,595,336 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1822 involving configuration of automatic repeat request [ARQ] with parallel processes
• CPC Class Codes: H04L 1/189 Transmission or retransmission of more than one copy of a message
• CPC Class Codes: H04L 1/1893 Physical mapping arrangements physical resource mapping in general H04L5/00
• CPC Class Codes: H04L 1/1896 ARQ related signaling
• CPC Class Codes: H04W 72/1268 of uplink data flows
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

Systems and methods are disclosed for performing combined grant-free and grant-based UL resource allocation. In a particular embodiment, a network entity sends a first type of UL transmission resource assignment selected from two types of UL transmission resource assignment mechanisms to a UE for grant-free transmission and a second type of UL transmission resource assignment from two types of UL transmission resource assignment mechanism to a UE for grant based transmission. The network entity then receives a first data transmission from the UE for grant free transmission using an assigned transmission resource and a second data transmission from the UE for grant based transmission using an assigned transmission resources. Other embodiments pertain to changing the resource allocation scheme from grant free to grant based for a UE, or vice versa. Examples reasons for doing so may include HARQ re-transmisisons.

Claims

1. A method for data transmission, comprising:

sending, by a network entity, a first type of UL transmission resource assignment to a first UE, wherein the first type of UL transmission resource assignment indicates a grant-free transmission for the first UE;

sending, by the network entity, a second type of UL transmission resource assignment for a second UE, the second type of UL transmission resource assignment indicates a grant based transmission for the second UE;

receiving, by the network entity, a first data transmission from the first UE for grant free transmission using a grant free transmission resource;

receiving, by the network entity, a second data transmission from the second UE for grant based transmission using an assigned grant based transmission resource.

2. The method of claim 1, before the sending, further comprising:

selecting, by the network entity, the first type of UL transmission resource assignment mechanism for the UE for grant free transmission when the first UE for grant free transmission accesses the network;

selecting, by the network entity, the second type of UL transmission resource assignment mechanism for the second UE for grant based transmission when the UE for grant based transmission accesses the network.

3. The method of claim 1, further comprising:

transmitting, by the network entity, an UL transmission resource assignment to the first UE, wherein the UL transmission resource assignment indicates that the first UE is to be switched to a grant based mode and includes an allocated grant based transmission resource;

or

transmitting, by the network entity, a signal to the first UE to switch to a grant based mode, and transmitting an UL transmission resource assignment to the first UE based on a scheduling request, wherein the UL transmission resource assignment indicates an allocated grant based transmission resource.

4. The method of claim 1, further comprising:

transmitting, by the network entity, a signal to the second UE to switch to a grant free mode, and transmitting an UL transmission resource assignment to the second UE, wherein the UL transmission resource assignment indicates an allocated grant free transmission resource.

5. The method of claim 1, further comprising:

receiving, by the network entity, the first data transmission from the first UE as a grant free retransmission using the grant free transmission resource;

or

sending, by the network entity, a DCI grant for retransmission to the first UE, and receiving the first data transmission from the first UE based on the assigned retransmission resource in the DCI grant.

6. The method of claim 1, further comprising:

sending, by the network entity, a DCI grant or NACK for retransmission to the second UE, and receiving the second data transmission from the second UE based on the assigned retransmission resource;

or

sending, by the network entity, a NACK or an indicator to switch to grant free retransmission mode and grant free retransmission resource, and receiving the second data transmission from the second UE for grant free transmission using the grant free transmission resource.

7. The method of claim 1, wherein transmitting the UL transmission resource assignment to the first UE is based on at least one of:

a) broadcast signaling

b) semi-persistent signaling;

c) RRC signaling;

d) dynamic signaling; and

e) UE specific signaling or UE group based signaling.

8. The method of claim 1, before receiving, by the network entity, a first data transmission from the first UE, further comprising:

receiving, by the network entity, a preamble from the first UE, wherein the preamble has a predefined relationship with a UE ID, and the UE ID has a predefined relationship with the grant free transmission resource;

or

receiving, by the network entity, a UE ID from the first UE, wherein the UE ID has a predefined relationship with the grant free transmission resource.

9. A network device comprising:

a processor; and

a computer-readable storage medium storing processor executable instructions for execution by the processor, the instructions for performing a method comprising the steps of;

sending, by a network entity, a first type of UL transmission resource assignment to a first UE, wherein the first type of UL transmission resource assignment indicates a grant-free transmission for the first UE;

sending, by the network entity, a second type of UL transmission resource assignment for a second UE, the second type of UL transmission resource assignment indicates a grant based transmission for the second UE;

receiving, by the network entity, a first data transmission from the first UE for grant free transmission using an grant free transmission resource;

receiving, by the network entity, a second data transmission from the second UE for grant based transmission using an assigned grant based transmission resource.

10. The network device of claim 9, wherein the processor executable instructions on stored on the computer readable storage medium include instructions for further performing, before the sending:

selecting, by the network entity, the first type of UL transmission resource assignment mechanism for the UE for grant free transmission when the first UE for grant free transmission accesses the network;

selecting, by the network entity, the second type of UL transmission resource assignment mechanism for the second UE for grant based transmission when the UE for grant based transmission accesses the network.

11. The network device of claim 9, wherein the processor executable instructions stored on the computer readable storage medium include instructions for further performing:

transmitting, by the network entity, an UL transmission resource assignment to the first UE, wherein the UL transmission resource assignment indicates that the first UE is to be switched to a grant based mode and includes an allocated grant based transmission resource;

or

transmitting, by the network entity, a signal to the first UE to switch to a grant based mode, and transmitting an UL transmission resource assignment to the first UE based on a scheduling request, wherein the UL transmission resource assignment indicates an allocated grant based transmission resource.

12. The network device of claim 9, wherein the processor executable instructions stored on the computer readable storage medium include instructions for further performing:

transmitting, by the network entity, a signal to the second UE to switch to a grant free mode, and transmitting an UL transmission resource assignment to the second UE, wherein the UL transmission resource assignment indicates an allocated grant free transmission resource.

13. The network device of claim 9, wherein the processor executable instructions on computer readable storage medium include instructions for further performing:

receiving, by the network entity, the first data transmission from the first UE as a grant free retransmission using the grant free transmission resource;

or

sending, by the network entity, a DCI grant for retransmission to the first UE, and receiving the first data transmission from the first UE based on the assigned retransmission resource in the DCI grant.

14. The network device of claim 9, wherein the processor executable instructions on computer readable storage medium include instructions for further performing:

sending, by the network entity, a DCI grant or NACK for retransmission to the second UE, and receiving the second data transmission from the second UE based on the assigned retransmission resource;

or

sending, by the network entity, a NACK or an indicator to switch to grant free retransmission mode and grant free retransmission resource, and receiving the second data transmission from the second UE for grant free transmission using the grant free transmission resource.

15. The network device of claim 9, wherein the processor executable instructions on computer readable storage medium include instructions for before receiving, by the network entity, a first data transmission from the first UE, further performing:

receiving, by the network entity, a preamble from the first UE, wherein the preamble has a predefined relationship with a UE ID, and the UE ID has a predefined relationship with the grant free transmission resource;

or

receiving, by the network entity, a UE ID from the first UE, wherein the UE ID has a predefined relationship with the grant free transmission resource.

16. A method for data transmission, comprising:

at least one of;

receiving, by user equipment, a first type of UL transmission resource assignment, wherein the first type of UL transmission resource assignment indicates a grant-free transmission for the UE; and

sending, by the UE, a first data transmission from the UE for grant free transmission using an grant free transmission resource;

or

receiving, by the UE, a second type of UL transmission resource assignment, wherein the second type of UL transmission resource assignment indicates a grant based transmission for the UE; and

sending, by the UE, a second data transmission from the UE for grant based transmission using an assigned grant based transmission resource.

17. The method of claim 16, further comprising:

receiving, by the UE, an UL transmission resource assignment, wherein the UL transmission resource assignment indicates that the UE is to be switched to a grant based mode and includes an allocated grant based transmission resource;

or

receiving, by the UE, a signal to switch to a grant based mode, and transmitting an UL transmission resource assignment to the UE based on a scheduling request, wherein the UL transmission resource assignment indicates an allocated grant based transmission resource.

18. The method of claim 16, further comprising:

receiving, by the UE, a signal to switch to a grant free mode, and receiving an UL transmission resource assignment, wherein the UL transmission resource assignment indicates an allocated grant free transmission resource.

19. The method of claim 16, further comprising:

transmitting, by the UE, the first data transmission from the UE as a grant free retransmission using the grant free transmission resource;

or

receiving, by the UE, a DCI grant for retransmission to the UE, and transmitting the first data transmission from the UE based on the assigned retransmission resource in the DCI grant.

20. The method of claim 16, wherein transmitting the UL transmission resource assignment to the first UE is based on at least one of:

a) broadcast signaling

b) semi-persistent signaling;

c) RRC signaling;

d) dynamic signaling; and

e) UE specific signaling or UE group based signaling.

21. The method of claim 16, before sending, by the UE, a first data transmission from the UE, further comprising:

sending, by the UE, a preamble, wherein the preamble has a predefined relationship with a UE ID, and the UE ID has a predefined relationship with the grant free transmission resource;

or

sending, by the UE, a UE ID, wherein the UE ID has a predefined relationship with the grant free transmission resource.

22. The method of claim 16, further comprising:

receiving, by the UE, a DCI grant or NACK for retransmission, and transmitting the second data transmission from the UE based on the assigned retransmission resource;

or

receiving, by the UE, a NACK or an indicator to switch to grant free retransmission mode and grant free retransmission resource, and transmitting the second data transmission for grant free transmission using the grant free transmission resource.

23. A User Equipment (UE) comprising:

a processor; and

a computer-readable storage medium storing processor executable instructions for execution by the processor, the instructions for performing a method comprising the steps of;

receiving, by user equipment, a first type of UL transmission resource assignment, wherein the first type of UL transmission resource assignment indicates a grant-free transmission for the UE; and

sending, by the UE, a first data transmission from the UE for grant free transmission using an grant free transmission resource;

or

receiving, by the UE, a second type of UL transmission resource assignment, wherein the second type of UL transmission resource assignment indicates a grant based transmission for the UE; and

sending, by the UE, a second data transmission from the UE for grant based transmission using an assigned grant based transmission resource.

24. The UE of claim 23, wherein the processor executable instructions on stored on the computer readable storage medium include instructions for further performing, before the sending:

receiving, by the UE, an UL transmission resource assignment, wherein the UL transmission resource assignment indicates that the UE is to be switched to a grant based mode and includes an allocated grant based transmission resource;

or

receiving, by the UE, a signal to switch to a grant based mode, and transmitting an UL transmission resource assignment to the UE based on a scheduling request, wherein the UL transmission resource assignment indicates an allocated grant based transmission resource.

25. The UE of claim 23, wherein the processor executable instructions stored on the computer readable storage medium include instructions for further performing:

receiving, by the UE, a signal to switch to a grant free mode, and receiving an UL transmission resource assignment, wherein the UL transmission resource assignment indicates an allocated grant free transmission resource.

26. The UE of claim 23, wherein the processor executable instructions stored on the computer readable storage medium include instructions for further performing:

transmitting, by the UE, the first data transmission from the UE as a grant free retransmission using the grant free transmission resource;

or

receiving, by the UE, a DCI grant for retransmission to the UE, and transitting the first data transmission from the UE based on the assigned retransmission resource in the DCI grant.

27. The UE of claim 23, wherein the processor executable instructions stored on the computer readable storage medium include instructions for before, sending by the UE, a first data transmission from the UE, further performing:

sending, by the UE, a preamble, wherein the preamble has a predefined relationship with a UE ID, and the UE ID has a predefined relationship with the grant free transmission resource;

or

sending, by the UE, a UE ID, wherein the UE ID has a predefined relationship with the grant free transmission resource.

28. The UE of claim 23, wherein the processor executable instructions stored on the computer readable storage medium include instructions for further performing:

receiving, by the UE, a DCI grant or NACK for retransmission, and transmitting the second data transmission from the UE based on the assigned retransmission resource;

or

receiving, by the UE, a NACK or an indicator to switch to grant free retransmission mode and grant free retransmission resource, and transmitting the second data transmission for grant free transmission using the grant free transmission resource.