CN-116636308-B - IAB timing variation MAC CE enhancement for case #6 timing support

Abstract

Methods, apparatuses, and computer programs for timing enhancement for integrated access and backhaul nodes are disclosed. A method includes receiving a control element that is used to determine a timing pattern and/or associated timing information for an integrated access and backhaul node, determining a timing pattern and/or associated timing information for the integrated access and backhaul node based on the control element, and applying the timing pattern and/or associated timing information to subsequent uplink transmissions for the integrated access and backhaul node.

Inventors

• K. Vanuga
• K. S. Radu Jayasinha
• J. S. Cohenan
• IA Ke Sijitaluo
• M. Chudak

Assignees

• 诺基亚技术有限公司

Dates

Publication Date

20260512

Application Date

20210831

Priority Date

20201016

Claims (20)

1. 1. A method for communication, comprising: receiving, with a first integrated access and backhaul node, a media access control element from a second integrated access and backhaul node, the media access control element being used to determine a timing pattern and associated timing information for the first integrated access and backhaul node; Determining, in response to detecting at least one bit pattern in the medium access control element indicating the timing pattern, the associated timing information of signaling within the medium access control element as a timing difference between uplink reception from a mobile termination portion of the first integrated access and backhaul node with a distributed unit of the second integrated access and backhaul node and downlink transmission from the distributed unit of the second integrated access and backhaul node to the mobile termination portion of the first integrated access and backhaul node; in response to detecting at least one other bit pattern in the medium access control element indicating the timing pattern, the at least one other bit pattern of the medium access control element being different from the at least one bit pattern of the medium access control element, determining the associated timing information of the intra-medium access control element signaling as an offset to align downlink transmission timing of a distributed unit of the first integrated access and backhaul node with downlink transmission timing of the second integrated access and backhaul node; Applying the timing pattern and the associated timing information to subsequent uplink transmissions for the first integrated access and backhaul node, and At the first integrated access and backhaul node, synchronizing, based on the timing difference, the uplink transmission of the mobile terminated portion of the first integrated access and backhaul node with a downlink transmission of the distributed unit of the first integrated access and backhaul node.
2. 2. The method of claim 1, wherein the at least one bit pattern of the medium access control element indicating the timing pattern and the at least one other bit pattern of the medium access control element indicating the timing pattern are part of reserved bits of the medium access control element, and the associated timing information is part of a set of bits of the medium access control element other than the reserved bits.
3. 3. The method according to claim 1, wherein: The at least one other bit pattern indicating the timing pattern comprises a reserved bit of the medium access control element being set to zero and the at least one bit pattern indicating the timing pattern comprises at least one reserved bit of the medium access control element not being set to zero.
4. 4. The method of claim 1, wherein another pattern of the medium access control elements different from the at least one bit pattern and the at least one other bit pattern indicates the timing pattern or at least one configuration parameter of the associated timing information.
5. 5. The method of claim 4, further comprising receiving an indication to use the timing difference for non-TDM transmissions when operating in a non-time division multiplexing mode.
6. 6. The method of claim 1, further comprising: When operating in support case #6 timing mode, maintaining propagation delay estimates based on the timing difference, and A timing advance for the case #1 timing is obtained from the propagation delay estimate and the offset.
7. 7. The method of claim 1, further comprising: In response to a time slot in which the medium access control element is recovered not being configured for time division multiplexing operation or a time slot after the time slot in which the medium access control element is recovered not being configured for time division multiplexing operation, determining the timing pattern and the associated timing information is based on a timing difference between uplink reception from the mobile termination portion of the first integrated access and backhaul node with a distributed unit of the second integrated access and backhaul node and downlink transmission from the distributed unit of the second integrated access and backhaul node to the mobile termination portion of the first integrated access and backhaul node.
8. 8. The method of claim 1, wherein the timing pattern and the associated timing information are based on a case #1 timing or a case #6 timing, Wherein case #1 timing and case #6 timing correspond to using an over-the-air procedure to maintain synchronization between downlink transmissions of a distributed unit at the first integrated access and backhaul node and downlink transmissions of a distributed unit at the second integrated access and backhaul node, and Wherein case #6 timing also corresponds to the distributed unit of the first integrated access and backhaul node and the mobile terminated portion of the first integrated access and backhaul node being sent simultaneously.
9. 9. The method of claim 1, wherein the timing pattern is indicated as case #6 timing, and the method further comprises: Determining whether the timing difference indicated with the timing pattern is within a range of possible indication values; Initiating a random access channel procedure at a next available priority random access channel occasion to reset the timing of the first integrated access and backhaul node when the timing difference is outside the range of the possible indication values, and When the timing difference is within the range of possible indication values, the timing difference is applied with respect to downlink reception timing of the mobile terminated portion of the first integrated access and backhaul node and a timing advance configuration is ignored.
10. 10. A method for communication, comprising: transmitting, from a first integrated access and backhaul node to a second integrated access and backhaul node, a media access control element for determining a timing pattern and associated timing information for the second integrated access and backhaul node; Indicating the timing pattern using at least one bit pattern of the medium access control element, wherein when the at least one bit pattern indicates the timing pattern, the associated timing information signaled within the medium access control element comprises a timing difference between uplink reception from a mobile termination portion of the second integrated access and backhaul node with a distributed unit of the first integrated access and backhaul node and downlink transmission from the distributed unit of the first integrated access and backhaul node to the mobile termination portion of the second integrated access and backhaul node; Indicating the timing pattern using at least one other bit pattern of the medium access control element that is different from the at least one bit pattern of the medium access control element, wherein the associated timing information signaled within the medium access control element includes an offset to align downlink transmission timing of a distributed unit of the second integrated access and backhaul node with downlink transmission timing of the first integrated access and backhaul node when the at least one other bit pattern indicates the timing pattern; receiving a subsequent uplink transmission from the second integrated access and backhaul node based on the timing pattern and the associated timing information; Wherein the timing difference is configured for use with the second integrated access and backhaul node to synchronize, at the second integrated access and backhaul node, the uplink transmission of the mobile terminated portion of the second integrated access and backhaul node with a downlink transmission of the distributed unit of the second integrated access and backhaul node.
11. 11. The method of claim 10, wherein the at least one bit pattern of the medium access control element indicating the timing pattern and the at least one other bit pattern of the medium access control element indicating the timing pattern are part of reserved bits of the medium access control element, and the associated timing information is part of a set of bits of the medium access control element other than the reserved bits.
12. 12. The method of claim 11, further comprising transmitting a configuration of the timing pattern for a given period of time for the second integrated access and backhaul node.
13. 13. The method according to claim 10, wherein: The at least one other bit pattern indicating the timing pattern comprises a reserved bit of the medium access control element being set to zero and the at least one bit pattern indicating the timing pattern comprises at least one reserved bit of the medium access control element not being set to zero.
14. 14. The method of claim 10, further comprising sending an indication to use the timing difference for non-TDM transmissions when operating in a non-time division multiplexing mode.
15. 15. The method according to claim 10, wherein: When the second integrated access and backhaul node operates in support of case #6 timing mode, propagation delay estimation is maintained based on the timing difference, and The timing advance for case #1 timing is obtained from the propagation delay estimate and the offset.
16. 16. The method according to claim 10, Wherein the timing pattern and the associated timing information are based on case #1 timing or case #6 timing, Wherein case #1 timing and case #6 timing correspond to using an over-the-air procedure to maintain synchronization between downlink transmissions of a distributed unit at the second integrated access and backhaul node and downlink transmissions of a distributed unit at the first integrated access and backhaul node, and Wherein case #6 timing also corresponds to the distributed unit of the second integrated access and backhaul node and the mobile termination portion of the second integrated access and backhaul node being sent simultaneously.
17. 17. An apparatus for communication, comprising: at least one processor, and At least one non-transitory memory including computer program code; wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to perform operations comprising: Receiving, with a first integrated access and backhaul node, a media access control element from a second integrated access and backhaul node, the media access control element for determining a timing pattern and associated timing information for the first integrated access and backhaul node; Determining, in response to detecting at least one bit pattern in the medium access control element indicating the timing pattern, the associated timing information of signaling within the medium access control element as a timing difference between uplink reception from a mobile termination portion of the first integrated access and backhaul node with a distributed unit of the second integrated access and backhaul node and downlink transmission from the distributed unit of the second integrated access and backhaul node to the mobile termination portion of the first integrated access and backhaul node; in response to detecting at least one other bit pattern in the medium access control element indicating the timing pattern, the at least one other bit pattern of the medium access control element being different from the at least one bit pattern of the medium access control element, determining the associated timing information of the intra-medium access control element signaling as an offset to align downlink transmission timing of a distributed unit of the first integrated access and backhaul node with downlink transmission timing of the second integrated access and backhaul node; Applying the timing pattern and the associated timing information to subsequent uplink transmissions for the first integrated access and backhaul node, and At the first integrated access and backhaul node, synchronizing, based on the timing difference, the uplink transmission of the mobile terminated portion of the first integrated access and backhaul node with a downlink transmission of the distributed unit of the first integrated access and backhaul node.
18. 18. The apparatus of claim 17, wherein the at least one bit pattern of the medium access control element indicating the timing pattern and the at least one other bit pattern of the medium access control element indicating the timing pattern are part of reserved bits of the medium access control element, and the associated timing information is part of a set of bits of the medium access control element other than the reserved bits.
19. 19. A program storage device embodying a program of instructions executable by a machine for performing operations comprising the method of any one of claims 1-9.
20. 20. A program storage device embodying a program of instructions executable by a machine for performing operations comprising the method of any one of claims 10-16.

Description

IAB timing variation MAC CE enhancement for case #6 timing support Technical Field The example and non-limiting embodiments relate generally to communications and, more particularly, to IAB timing change MAC CE enhancement for case #6 timing support. Background It is known to integrate access and backhaul in a communication network. Disclosure of Invention According to one aspect, a method includes receiving a control element that is used to determine a timing pattern and/or associated timing information for an integrated access and backhaul node, determining a timing pattern and/or associated timing information for the integrated access and backhaul node based on the control element, and applying the timing pattern and/or associated timing information to a subsequent uplink transmission for the integrated access and backhaul node. According to one aspect, a method includes providing a control element that is used to determine a timing pattern and/or associated timing information for an integrated access and backhaul node, wherein the timing pattern and/or associated timing information for the integrated access and backhaul node is determined based on the control element, and receiving a subsequent uplink transmission from the integrated access and backhaul node based on the determined timing pattern and/or associated timing information. According to one aspect, an apparatus includes at least one processor, and at least one non-transitory memory including computer program code, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to perform receiving a control element that is used to determine a timing pattern and/or associated timing information for an integrated access and backhaul node, determining a timing pattern and/or associated timing information for the integrated access and backhaul node based on the control element, and applying the timing pattern and/or associated timing information to a subsequent uplink transmission for the integrated access and backhaul node. According to one aspect, an apparatus includes at least one processor, and at least one non-transitory memory including computer program code, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to perform providing a control element that is used to determine a timing pattern and/or associated timing information for an integrated access and backhaul node, wherein the timing pattern and/or associated timing information for the integrated access and backhaul node is determined based on the control element, and receiving a subsequent uplink transmission from the integrated access and backhaul node based on the determined timing pattern and/or associated timing information. According to one aspect, an apparatus includes means for receiving a control element used to determine a timing pattern and/or associated timing information for an integrated access and backhaul node, means for determining a timing pattern and/or associated timing information for an integrated access and backhaul node based on the control element, and means for applying the timing pattern and/or associated timing information to a subsequent uplink transmission for the integrated access and backhaul node. According to one aspect, an apparatus includes means for providing a control element that is used to determine a timing pattern and/or associated timing information for an integrated access and backhaul node, wherein the timing pattern and/or associated timing information for the integrated access and backhaul node is determined based on the control element, and means for receiving a subsequent uplink transmission from the integrated access and backhaul node based on the determined timing pattern and/or associated timing information. According to one aspect, there is provided a program storage device readable by a machine, tangibly embodying a program of instructions executable by the machine to perform operations comprising receiving a control element, the control element being used to determine a timing pattern and/or associated timing information for an integrated access and backhaul node, determining a timing pattern and/or associated timing information for an integrated access and backhaul node based on the control element, and applying the timing pattern and/or associated timing information to subsequent uplink transmissions for the integrated access and backhaul node. According to one aspect, there is provided a program storage device readable by a machine, tangibly embodying a program of instructions executable by the machine to perform operations comprising providing a control element used to determine a timing pattern and/or associated timing information for an integrated access and backhaul node, wherein the timing pattern and/or associated timing information for the integrated acces