SYSTEMS AND METHODS FOR SIGNALING FOR SEMI-STATIC CONFIGURATION IN GRANT-FREE UPLINK TRANSMISSIONS

• US 20180199359A1
• Filed: 12/04/2017
• Published: 07/12/2018
• Est. Priority Date: 01/09/2017
• 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: CAO, YU, ZHANG, LIQING, MA, JIANGLEI
• Granted Patent: US 11,546,929 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 1/0079 Formats for control data H04L1/16 takes precedence; training sequences H04L25/00 and H04L27/00
• CPC Class Codes: H04L 1/1816 with retransmission of the same, encoded, message
• CPC Class Codes: H04L 1/189 Transmission or retransmission of more than one copy of a message
• CPC Class Codes: H04L 1/1896 ARQ related signaling
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0012 Hopping in multicarrier systems for frequency hopping in spread spectrum systems H04B1/713
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04L 5/0096 Indication of changes in allocation
• CPC Class Codes: H04W 28/04 Error control
• CPC Class Codes: H04W 72/044 based on the type of the allocated resource
• 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
• CPC Class Codes: H04W 72/52 based on load
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal

Abstract

Methods and systems are provided for signaling for semi-static configuration in grant free uplink transmissions. Radio resource control (RRC) signaling is used to provide information from a base station to a user equipment (UE) that configure the grant free transmission resource to be used by the UE. In some implementations, the RRC signaling may be used in conjunction with system information that is transmitted to all UEs and/or Downlink Control Information (DCI) that the UE needs to access subsequent to the RRC signaling. In some implementations, the DCI includes an activation or deactivation indicator that the UE monitors to determine when the UE is allowed to transmit to the BS or should stop transmitting. Implementations allow for grant free transmission resources to be configured on an individual user based and a group basis.

Claims

1. A method for a user equipment (UE) for grant free transmissions, the method comprising:

receiving, from a network equipment, a radio resource control (RRC) signaling indicating an uplink grant free transmission resource configuration for the transmission and re-transmission of uplink data, the uplink grant free transmission resource configuration including a time resource, a frequency resource, reference signal (RS) resource information, and an interval between two grant free transmission opportunities,

obtaining uplink grant free transmission resources based on the RRC signaling, without receiving downlink control information (DCI) for an initial transmission of the uplink data, and

transmitting, to the network equipment, the uplink data using the uplink grant free transmission resources.

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

receiving, from the network equipment, a DCI message indicating a grant for a re-transmission of the uplink data; and

re-transmitting, to the network equipment, the uplink data based on the grant.

3. The method of claim 2, wherein the RRC signaling further comprises a grant free UE identifier, the method further comprising:

decoding the DCI message using the grant free UE identifier.

4. The method of claim 2, wherein the DCI message comprises a new data indicator field set to a value of 1 indicating the grant for the re-transmission of the uplink data.

5. The method of claim 1, wherein the RRC signaling further comprises a number of transmission repetitions of the uplink data.

6. The method of claim 1, wherein the RRC signaling further comprises a number of configured HARQ processes.

7. The method of claim 1, wherein the RRC signaling further comprises at least one of the following:

power control parameters;

a group identifier for a plurality of grant free UEs;

a resource hopping pattern;

a RS hopping pattern; and

modulation and coding scheme (MCS) information.

8. The method of claim 1 further comprising re-transmitting the uplink data using the uplink grant free transmission resources if no DCI message indicating a grant for a re-transmission of the uplink data has been received.

9. The method of claim 3 further comprising re-transmitting the uplink data using the uplink grant free transmission resources until the number of transmission repetitions is reached.

10. A user equipment (UE) configured for grant free transmissions, the UE comprising:

a processor; and

a computer readable storage medium storing programming instructions for execution by the processor, the programming including instructions to;

receive, from a network equipment, a radio resource control (RRC) signaling from a network equipment, wherein the RRC signaling indicates an uplink grant free transmission resource configuration for the transmission and re-transmission of uplink data, and wherein the uplink grant free transmission resource configuration includes a time resource, a frequency resource, reference signal (RS) resource information, and an interval between two grant free transmission opportunities;

obtain uplink grant free transmission resources based on the RRC signaling, without receiving downlink control information (DCI) for an initial transmission of the uplink data; and

transmit, to network equipment, the uplink data using the uplink grant free transmission resources.

11. The UE of claim 10, the computer-readable medium having stored thereon computer-executable instructions, that when executed by the processor cause the UE to:

receive, from the network equipment, a DCI message indicating a grant for a re-transmission of the uplink data; and

re-transmit, to the network equipment, the uplink data based on the grant.

12. The UE of claim 11, wherein the RRC signaling further comprises a grant free UE identifier, the computer-readable medium having stored thereon computer-executable instructions, that when executed by the processor cause the UE to:

decode the DCI message using the grant free UE identifier.

13. The UE of claim 11, wherein the DCI message comprises a new data indicator field set to a value of 1 indicating the grant for the re-transmission of the uplink data.

14. The UE of claim 10, wherein the RRC signaling further comprises a number of transmission repetitions of the uplink data.

15. The UE of claim 10, wherein the RRC signaling further comprises a number of configured HARQ processes.

16. The UE of claim 10, wherein the RRC signaling further comprises at least one of the following:

power control parameters;

a group identifier for a plurality of grant free UEs;

a resource hopping pattern;

a RS hopping pattern; and

modulation and coding scheme (MCS) information.

17. The UE of claim 10, the computer-readable medium having stored thereon computer-executable instructions, that when executed by the processor cause the UE to:

re-transmit the uplink data using the uplink grant free transmission resources if no DCI message indicating a grant for a re-transmission of the uplink data has been received.

18. The UE of claim 14, the computer-readable medium having stored thereon computer-executable instructions, that when executed by the processor cause the UE to:

re-transmit the uplink data using the uplink grant free transmission resources until the number of transmission repetitions is reached.

23. The method of claim 15, wherein the RRC signaling further comprises a number of transmission repetitions of the uplink data.

24. The method of claim 15, wherein the RRC signaling further comprises a number of configured HARQ processes.

25. The method of claim 15, wherein the RRC signaling further comprises at least one of the following:

power control parameters;

a group identifier for a plurality of grant free UEs;

a resource hopping pattern;

a RS hopping pattern; and

modulation and coding scheme (MCS) information.

26. The method of claim 15 further comprising receiving a re-transmission of the uplink data using the uplink grant free transmission resources.

27. The method of claim 23 further comprising receiving a re-transmission of the uplink data using the uplink grant free transmission resources until the number of transmission repetitions is reached.

19. A method for a network equipment for grant free transmissions, the method comprising:

transmitting, to a user equipment (UE), a radio resource control (RRC) signaling indicating an uplink grant free transmission resource configuration for the transmission and re-transmission of uplink data, wherein the uplink grant free transmission resource configuration includes a time resource, a frequency resource, reference signal (RS) resource information, and an interval between two grant free transmission opportunities, and

receiving, from the UE, uplink data transmitted using uplink grant free transmission resources allocated based on the RRC signaling, without transmitting downlink control information (DCI) for an initial transmission of the uplink data.

20. The method of claim 19, the method further comprising:

transmitting, to the UE, a DCI message indicating a grant for a re-transmission of the uplink data; and

receiving, from the UE, the uplink data re-transmitted based on the grant.

21. The method of claim 20, wherein the RRC signaling further includes a grant-free UE identifier.

22. The method of claim 20, wherein the DCI message comprises a new data indicator field set to a value of 1 indicating the grant for the re-transmission of the uplink data.

28. A network equipment configured for grant free transmissions, the network equipment comprising:

a processor; and

a computer readable storage medium storing programming instructions for execution by the processor, the programming including instructions to;

transmit, to a user equipment (UE), a radio resource control (RRC) signaling indicating an uplink grant free transmission resource configuration for the transmission and re-transmission of uplink data, wherein the uplink grant free transmission resource configuration includes a time resource, a frequency resource, reference signal (RS) resource information, and an interval between two grant free transmission opportunities, and

receive, from the UE, uplink data transmitted using uplink grant free transmission resources allocated based on the RRC signaling, without transmitting downlink control information (DCI) for an initial transmission of the uplink data.

29. The network equipment of claim 28, the computer-readable medium having stored thereon computer-executable instructions, that when executed by the processor cause the network equipment to:

transmit, to the UE, a DCI message indicating a grant for a re-transmission of the uplink data; and

receive, from the UE, the uplink data based on the grant.

30. The network equipment of claim 29, wherein the RRC signaling further comprises a grant free UE identifier.

31. The network equipment of claim 29, wherein the DCI message comprises a new data indicator field set to a value of 1 indicating the grant for the re-transmission of the uplink data.

32. The network equipment of claim 28, wherein the RRC signaling further comprises a number of transmission repetitions of the uplink data.

33. The network equipment of claim 28, wherein the RRC signaling further comprises a number of configured HARQ processes.

34. The network equipment of claim 28, wherein the RRC signaling further comprises at least one of the following:

power control parameters;

a group identifier for a plurality of grant free UEs;

a resource hopping pattern;

a RS hopping pattern; and

modulation and coding scheme (MCS) information.

35. The network equipment of claim 28, the computer-readable medium having stored thereon computer-executable instructions, that when executed by the processor cause the network equipment to:

receive a re-transmission of the uplink data using the uplink grant free transmission resources.

36. The network equipment of claim 32, the computer-readable medium having stored thereon computer-executable instructions, that when executed by the processor cause the network equipment to:

receive a re-transmission of the uplink data using the uplink grant free transmission resources until the number of transmission repetitions is reached.