CN114930734A - Timeline information for aperiodic semi-persistent scheduling transmission - Google Patents

Timeline information for aperiodic semi-persistent scheduling transmission Download PDF

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CN114930734A
CN114930734A CN202080092880.3A CN202080092880A CN114930734A CN 114930734 A CN114930734 A CN 114930734A CN 202080092880 A CN202080092880 A CN 202080092880A CN 114930734 A CN114930734 A CN 114930734A
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Prior art keywords
time domain
csi
user equipment
timeline information
domain offset
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Chinese (zh)
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苟伟
郝鹏
韩祥辉
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0643—Feedback on request
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Methods, apparatuses, and systems are disclosed for providing timeline information associated with physical layer signaling to reduce and/or eliminate timing delays for uplink reporting. In one example aspect, a method of wireless communication includes transmitting, by a base station, a control message to a user equipment on a first control channel, the control message triggering transmission of a Channel State Information (CSI) report from the user equipment to the base station on a second control channel. The method also includes transmitting, by the base station, a reference signal to the user equipment; and receiving, by the base station, the CSI report on the second control channel according to the timeline information associated with the user equipment receiving the reference signal. The timeline information indicates a time-domain starting position of transmission of the CSI report on the second control channel.

Description

Timeline information for aperiodic semi-persistent scheduling transmission
Technical Field
This patent document relates generally to wireless communications.
Background
Mobile communication technology is pushing the world to an increasingly interconnected and networked society. The rapid growth of mobile communications and advances in technology have resulted in greater demands for capacity and connectivity. Other aspects such as energy consumption, equipment cost, spectral efficiency and latency are also important to meet the needs of various communication scenarios. Various technologies, including new methods to provide higher quality service, longer battery life, and improved performance, are under discussion.
Disclosure of Invention
This patent document describes, among other things, techniques to provide timeline information associated with the reception of reference signals for channel state measurements to reduce and/or eliminate timing delays for uplink reporting.
In one example aspect, a method of wireless communication is disclosed. The method includes transmitting, by a base station, a control message to a user equipment on a first control channel, the control message triggering transmission of a Channel State Information (CSI) report from the user equipment to the base station on a second control channel. The method also includes transmitting, by the base station, a reference signal to the user equipment; and receiving, by the base station, the CSI report on the second control channel according to the timeline information associated with the user equipment receiving the reference signal. The timeline information indicates a time domain starting position of transmission of the CSI report on the second control channel.
In another example aspect, a method of wireless communication is disclosed. The method includes receiving, by a user equipment, a control message from a base station on a first control channel, the control message triggering transmission of a CSI report from the user equipment to the base station on a second control channel. The method also includes receiving, by the user equipment, a reference signal from the base station; and transmitting, by the user equipment, the CSI report on the second control channel according to timeline information associated with reception of the reference signal, the timeline information indicating a time-domain starting position of transmission of the CSI report.
In another example aspect, a communications apparatus is disclosed. The apparatus includes a processor configured to implement the above-described method.
In yet another embodiment aspect, a computer program storage medium is disclosed. The computer program storage medium includes code stored thereon. The code, when executed by a processor, causes the processor to implement the described methods.
These and other aspects are described herein.
Drawings
Fig. 1 is a flow chart representation of a method of wireless communication in accordance with the present technology.
Fig. 2 is a flow chart representation of another method of wireless communication in accordance with the present technique.
FIG. 3 illustrates example timeline information in accordance with the present technology.
FIG. 4 illustrates another example timeline information in accordance with the present technology.
FIG. 5A illustrates another example timeline information in accordance with the present techniques.
FIG. 5B illustrates another example timeline information in accordance with the present techniques.
FIG. 6A illustrates another example timeline information in accordance with the present techniques.
FIG. 6B illustrates yet another example timeline information in accordance with the present technology.
Fig. 7 illustrates an example of a wireless communication system in which techniques in accordance with one or more embodiments of the present technology may be applied.
Fig. 8 is a block diagram representation of a portion of a wireless station in which techniques in accordance with one or more embodiments of the present technology may be applied.
Detailed Description
The section headings are used in this patent document only to improve readability, and not to limit the scope of the embodiments and techniques disclosed in each section to only that section. Some features are described using an example of a fifth generation (5G) wireless protocol. However, the applicability of the disclosed technology is not limited to 5G wireless systems.
The 5G new air interface (NR) communication system supports high-reliability and low-latency (URLLC) services. One of the key aspects in supporting URLLC traffic is to efficiently and reliably provide up-to-date Channel State Information (CSI). Currently, aperiodic CSI (a-CSI) may be triggered by scheduling Uplink (UL) grants on a Physical Uplink Shared Channel (PUSCH). The a-CSI report is then transmitted by the UL grant. However, there is a time-domain gap between the Downlink Control Information (DCI) control message triggering a-CSI and the transmission of a-CSI over the PUSCH. The gap may be large, resulting in a delay in a-CSI feedback (e.g., 2 to 4 m). As a result, the base station cannot obtain the latest CSI in time. Furthermore, triggering a-CSI by UL grant may cause congestion in the Physical Downlink Control Channel (PDCCH). For example, when there are many DCI messages on the PDCCH to schedule Physical Downlink Shared Channel (PDSCH) transmissions, the additional DCI signaling that triggers an a-CSI report may result in congestion on the PDCCH.
This patent document discloses techniques that may be implemented in various embodiments to provide timeline information associated with reference signal reception and measurement to reduce and/or eliminate timing delays for a-CSI reporting. Fig. 1 is a flow chart representation of a wireless communication method 100 in accordance with the present technique. The method 100 includes, at operation 110, transmitting, by a base station, a control message to a user equipment on a first control channel, the control message triggering transmission of a Channel State Information (CSI) report from the user equipment to the base station on a second control channel. The method includes transmitting, by a base station, a reference signal to a user equipment at operation 120. The method also includes receiving, by the base station, a CSI report on a second control channel according to timeline information associated with the user equipment receiving the reference signal, at operation 130. The timeline information indicates a time-domain starting position of transmission of the CSI report on the second control channel. Both the base station and the user equipment know where the a-CSI is located, thereby reducing and/or eliminating delays in CSI reporting and processing.
In some embodiments, the timeline information includes a first indicator indicating a first time domain offset from completion of reception of the reference signal by the user equipment. In some embodiments, the timeline information includes a second indicator indicating a second time domain offset from completion of the user equipment receiving the message. In some embodiments, the time domain starting position of the transmission of the CSI report is no earlier than (1) the first time domain position determined by the first time domain offset, and (2) the second time domain position determined by the second time domain offset.
In some embodiments, the timeline information includes a third indicator indicating a third time-domain offset from completion of decoding the control message on the control channel. In some embodiments, the time domain starting position of the transmission of the CSI report is no earlier than (1) the first time domain position determined by the first time domain offset, and (2) the third time domain position determined by the third time domain offset.
In some embodiments, the method includes receiving an acknowledgement of the data transmission and a CSI report according to the timeline information. In some embodiments, the method comprises performing data transmission to the user equipment in accordance with the control message. In some embodiments, the timeline information includes a fourth indicator indicating a fourth time domain offset from completion of reception of the data transmission by the user equipment. In some embodiments, the time domain starting position of the transmission of the CSI report is no earlier than (1) the first time domain position determined by the first time domain offset, and (2) the fourth time domain position determined by the fourth time domain offset. In some embodiments, the time domain starting position of the transmission of the CSI report is no earlier than (1) the first time domain position determined by the first time domain offset, (2) the third time domain position determined by the third time domain offset, and (3) the fourth time domain position determined by the fourth time domain offset.
In some embodiments, the timeline information indicates resources to be used for CSI reporting. In some embodiments, the resources comprise time domain slots for CSI reporting. In some embodiments, the resources comprise Physical Uplink Control Channel (PUCCH) resources. In some embodiments, at least one of the first, second, third, or fourth time domain offsets is specified in a protocol cluster, such as a third generation partnership project (3GPP) standard.
Fig. 2 is a flow chart representation of a method 200 of wireless communication in accordance with the present technology. The method 200 includes, at operation 210, receiving, by a user equipment, a control message from a base station on a first control channel, the control message triggering transmission of a Channel State Information (CSI) report from the user equipment to the base station on a second control channel. The method 200 includes, at operation 220, receiving, by a user equipment, a reference signal from a base station. The method also includes transmitting, at operation 230, a CSI report on a second control channel in accordance with timeline information associated with reception of the reference signal. The timeline information indicates a time domain starting position of transmission of the CSI report. Both the base station and the user equipment know where the a-CSI is located, thereby reducing and/or eliminating delays in CSI reporting and processing.
In some embodiments, the timeline information includes a first indicator indicating a first time domain offset from completion of reception of the reference signal by the user equipment. In some embodiments, the timeline information includes a second indicator indicating a second time domain offset from completion of the user equipment receiving the message. In some embodiments, the time domain starting position of the transmission of the CSI report is no earlier than (1) a first time domain position determined by the first time domain offset, and (2) a second time domain position determined by the second time domain offset. In some embodiments, the timeline information includes a third indicator indicating a third time domain offset from completion of decoding the control message on the control channel. In some embodiments, the time domain starting position of the transmission of the CSI report is no earlier than (1) the first time domain position determined by the first time domain offset, and (2) the third time domain position determined by the third time domain offset.
In some embodiments, the method includes receiving an acknowledgement of the data transmission and a CSI report according to the timeline information. In some embodiments, the method comprises performing data transmission to the user equipment in accordance with the control message. In some embodiments, the timeline information includes a fourth indicator indicating a fourth time domain offset from completion of reception of the data transmission by the user equipment. In some embodiments, the time domain starting position of the transmission of the CSI report is no earlier than (1) the first time domain position determined by the first time domain offset, and (2) the fourth time domain position determined by the fourth time domain offset. In some embodiments, the time domain starting position of the transmission of the CSI report is no earlier than (1) the first time domain position determined by the first time domain offset, (2) the third time domain position determined by the third time domain offset, and (3) the fourth time domain position determined by the fourth time domain offset.
In some embodiments, the timeline information indicates resources to be used for CSI reporting. In some embodiments, the resources comprise time domain slots for CSI reporting. In some embodiments, the resources comprise Physical Uplink Control Channel (PUCCH) resources. In some embodiments, at least one of the first, second, third or fourth time domain offsets is specified in a protocol cluster, such as the 3GPP standard.
The above method XX, as further described in this document. Some examples of the disclosed technology are described in the following example embodiments.
Example 1
In some embodiments, the timeline information may be associated with the reception of physical layer control messages (e.g., DCI). The control message may include information for scheduling downlink transmissions on another channel (e.g., PDSCH). The time-domain starting position of the a-CSI report may be determined according to a set of predefined rules and when a control message is received. FIG. 3 illustrates example timeline information in accordance with the present technology. The timeline information includes at least a first time domain offset J1 and/or a second time domain offset M2. The starting position of the PUCCH for a-CSI reporting needs to satisfy at least one of the following conditions:
1. the first time domain position G1 is determined by adding a first time domain offset J1 to the end symbol of the control message on the PDCCH. The first time domain offset J1 ensures that the UE can have enough time to decode the PDCCH with the control message.
2. A second time domain position F2 is determined by adding a second time domain offset M2 to the end symbols of one or more Reference Signals (RSs) used for CSI measurement. The second time-domain offset M2 ensures that the UE may have enough time to measure the reference signal(s), calculate the CSI accordingly, and encode the a-CSI report.
The starting symbol of the PUCCH for a-CSI reporting is not earlier than positions G1 and F2, or later than positions G1 and F2.
After ascertaining G1 and F2, the PUCCH for a-CSI reporting may be determined accordingly. Referring back to fig. 3 as a specific example, F2 is positioned later in the time domain than G1. The uplink slot carrying the PUCCH for a-CSI reporting may be the R (e.g., R ═ 1) th uplink slot at or after F2 that meets the requirements for transmitting a-CSI (e.g., has the required PUCCH format and sufficient payload). R is a positive integer. The uplink slots are located on the carrier of the PUCCH for a-CSI reporting. Further, PUCCH resources for a-CSI reporting in the uplink slot may be determined according to the PRI in the control message. In some embodiments, the PUCCH resource for a-CSI reporting may be the E-th (e.g., E ═ 1) PUCCH resource at or after F2 that meets the requirements (e.g., has the required format and sufficient payload) for transmitting a-CSI reports. E is a positive integer.
In some embodiments, the one or more reference signals comprise one or more of: CSI-RS, CSI interference measurement (CSI-IM), non-zero power (NZP) CSI-RS, demodulation reference signals (DMRS), or other signals. If the UE needs to measure multiple reference signals, a second time domain position F2 may be determined based on the end symbol of each reference signal to ensure that the UE has enough time to measure and calculate a-CSI for all reference signals.
In some embodiments, the value of the first time domain offset J1 may be one of: n as defined in 3GPP TS38.213, or N as defined in TS38.214 pdsch . In some embodiments, the value of the second time domain offset M2 may be one of: n1, N2, T defined in TS38.213 proc,1 、T proc,2 Or T proc,CSI . The value of M2 may also be one of the following: z, Z', T as defined in TS38.214 proc,CSI 。
In some embodiments, J1 or M2 may be one of: t defined in TS38.214 or TS38.213 proc,1 、N、N1、T proc,2 、N2、Z、Z'、T proc,CSI Or N3. When J1 and/or M2 is equal to T proc,1 Can be at T proc,1 In the middle will d 1,1 Is set to 0. When J1 and/or M2 is equal to T proc,2 Can be at T proc,2 In (d) 2,1 Is set to 0. J1 and/or M2 may also be set to other predetermined values.
In some embodiments, J1 and M2 are based on the minimum subcarrier spacing from the associated signal or channel related to the a-CSI report. For example, if a subcarrier spacing of carriers for transmitting a control message on a PDCCH is 15KHz, a subcarrier spacing of carriers for transmitting one or more Reference Signals (RSs) for CSI measurement is 30KHz, and a subcarrier spacing of carriers for carrying a PUCCH for a-CSI reporting is 30KHz, values of J1 and M2 are determined based on a minimum subcarrier spacing, which is 15 KHz.
Example 2
As mentioned above, the physical layer control message that triggers a-CSI may simultaneously schedule PDSCH transmissions. In some embodiments, HARQ-ACK feedback corresponding to PDSCH transmission may be transmitted in the same PUCCH with a-CSI reports. FIG. 4 illustrates another example timeline information in accordance with the present technology. The timeline information comprises at least a first time domain offset M1 and/or a second time domain offset M2. The starting position of the PUCCH for a-CSI reporting needs to satisfy at least one of the following conditions:
1. the first time domain position P1 is determined by adding a first time domain offset M1 to the end symbol of the PDSCH transmission. The first time domain offset M1 ensures that the UE may have enough time to decode the PDSCH transmission and form HARQ-ACK feedback.
2. The second time domain position P2 is determined by adding a second time domain offset M2 to an end symbol of one or more Reference Signals (RSs) used for CSI measurement. The second time-domain offset M2 ensures that the UE may have enough time to measure the reference signal(s), calculate the CSI accordingly, and encode the a-CSI report.
The starting symbol of PUCCH for a-CSI reporting is not earlier than positions P1 and P2 or after positions P1 and P2, whichever is later.
After ascertaining P1 and P2, the PUCCH for a-CSI reporting may be determined accordingly. Referring back to fig. 4 as a specific example, P2 is positioned later in the time domain than P1. The uplink slot carrying the PUCCH for a-CSI reporting may be the R (e.g., R ═ 1) th uplink slot at or after P2 that meets the requirements for transmitting a-CSI (e.g., has the required PUCCH format and sufficient payload). R is a positive integer. The uplink slot is located on a carrier of the PUCCH for a-CSI reporting. Further, PUCCH resources for a-CSI reporting in the uplink slot may be obtained according to the PRI in the control message. In some embodiments, the PUCCH resource for a-CSI reporting may be the E-th (e.g., E ═ 1) PUCCH resource at or after P2 that meets the requirements (e.g., has a required format and sufficient payload) for transmission of a-CSI reports. E is a positive integer.
In some embodiments, the control message also includes a PDSCH-to-HARQ feedback timing indicator (e.g., k1) and a PRI. k1 may be used to determine a slot and the PRI may be used to determine PUCCH resources within the slot for transmission of a-CSI and HARQ-ACK. Note that the HARQ-ACK may be an acknowledgement to a PDSCH transmission scheduled by the control message or other PDSCH transmission. Further details regarding the determination of PUCCH resources based on k1 and/or PRI may be found in embodiment 5.
In some embodiments, the one or more reference signals comprise one or more of: CSI-RS, CSI interference measurement (CSI-IM), non-zero power (NZP) CSI-RS, demodulation reference signals (DMRS), or other signals. If the UE needs to measure multiple reference signals, the second time domain position P2 may be determined based on the ending symbol of each reference signal to ensure that the UE has enough time to measure and compute the a-CSI for all reference signals.
In some embodiments, the value of the first time domain offset M1 may be one of: n1 or T as defined in 3GPP TS38.213 proc,1 . In some embodiments, the value of the second time domain offset M2 may be one of: n1, N2, T defined in TS38.213 proc,1 、T proc,2 Or T proc,CSI . The value of M2 may also be one of the following: z, Z', T as defined in TS38.214 proc,CSI 。
In some embodiments, M1 and/or M2 may be one of: t defined in TS38.214 or TS38.213 proc,1 、N、N1、T proc,2 、N2、Z、Z'、T proc,CSI Or N3. When M1 and/or M2 is equal to T proc,1 When is at T proc,1 In (d) 1,1 Is set to 0. When M1 and/or M2 is equal to T proc,2 Can be at T proc,2 In (d) 2,1 Is set to 0. M1 and/or M2 may also be set to other predetermined values.
In some embodiments, M1 and M2 are based on the minimum subcarrier spacing from the associated signal or channel related to the a-CSI report. For example, if a subcarrier spacing of carriers for transmitting a control message on a PDCCH is 30KHz, a subcarrier spacing of carriers for transmitting one or more Reference Signals (RSs) for CSI measurement is 30KHz, a subcarrier spacing of carriers for transmitting a PDSCH is 60KHz, and a subcarrier spacing of carriers carrying a PUCCH for a-CSI reporting is 60KHz, values of M1 and M2 are determined based on a minimum subcarrier spacing, which is 30 KHz.
Example 3
In some embodiments, the timeline information indicates at least a first time domain offset W21. FIG. 5A illustrates example timeline information in accordance with the present techniques. Here, the reference signal(s) for CSI measurement is located after a time (which is denoted as W1) required for the UE to decode the PDCCH with the control message. The time domain position a21 is determined by adding a time domain offset W21 to the end symbols of one or more Reference Signals (RSs) used for CSI measurement. The time domain offset W21 ensures that the UE can have enough time to measure the reference signal(s), calculate the CSI accordingly, and encode the a-CSI report. The starting position of the PUCCH for a-CSI reporting is not earlier than position a21, or after position a 21.
In some embodiments, the timeline information indicates at least a second time domain offset W22. FIG. 5B illustrates another example timeline information in accordance with the present techniques. Here, the reference signal(s) for CSI measurement are positioned before the time required for the UE to decode the PDCCH with the control message. Since the UE can perform RS measurement only after decoding the control message, the time domain position a22 is determined by adding the time domain offset W22 to the amount of time required for the UE to decode the PDCCH with the control message. The time domain offset W22 ensures that the UE can have enough time to measure the reference signal(s), calculate the CSI accordingly, and encode the a-CSI report after the signaling is decoded correctly. The starting position of the PUCCH for a-CSI reporting is not earlier than position a22 or after position a 22.
In some embodiments, the one or more reference signals comprise one or more of: CSI-RS, CSI interference measurement (CSI-IM), non-zero power (NZP) CSI-RS, demodulation reference signals (DMRS), or other signals. If the UE needs to measure multiple reference signals, a second time domain position a22 may be determined based on the end symbol of each reference signal to ensure that the UE has enough time to measure and calculate a-CSI for all reference signals.
In some embodiments, the value of W1 may be one of the following: n as defined in 3GPP TS38.213, or N as defined in TS38.214 pdsch . In some embodiments, the value of the first time domain offset W21 and/or the second time domain offset W22 may be one of: n1, N2, T defined in TS38.213 proc,1 、T proc,2 Or T proc,CSI . The values of W21 and W22 may also be one of the following: z, Z', T as defined in TS38.214 proc,CSI 。
In some embodiments, W1, W21, and/or W22 may be one of: t defined in TS38.214 or TS38.213 proc,1 、N、N1、T proc,2 、N2、Z、Z'、T proc,CSI Or N3. When W1, W21 and/or W22 is equal to T proc,1 Can be at T proc,1 In the middle will d 1,1 Is set to 0. When W1, W21 and/or W22 is equal to T proc,2 Can be at T proc,2 In (d) 2,1 Is set to 0. W1, W21, and/or W22 may also be set to other predetermined values.
In some embodiments, W1 and W21 (or W22) are based on the minimum subcarrier spacing from the associated signal or channel related to the a-CSI report. For example, if a subcarrier spacing of carriers for transmitting a control message on a PDCCH is 30KHz, a subcarrier spacing of carriers for transmitting one or more Reference Signals (RSs) for CSI measurement is 30KHz, and a subcarrier spacing of carriers for carrying a PUCCH for a-CSI report is 60KHz, values of W1 and W21 (or W22) are determined based on a minimum subcarrier spacing, which is 30 KHz.
After ascertaining a21 (as shown in fig. 5A) and/or a22 (as shown in fig. 5B), the location of the PUCCH for a-CSI reporting may be determined accordingly. In some embodiments, the uplink slot carrying the PUCCH for a-CSI reporting is the R (e.g., R ═ 1) th uplink slot on or after a21 or a22 that meets the requirements (e.g., has the required PUCCH format and sufficient payload). R is a positive integer. The uplink slots are located on the carrier of the PUCCH for a-CSI reporting. Further, PUCCH resources for a-CSI reporting in the uplink slot may be determined according to the PRI in the control message. In some embodiments, the PUCCH resource for a-CSI reporting is the E (e.g., E ═ 1) th PUCCH resource at or after a21 or a22 that meets the requirements (e.g., has the required format and sufficient payload). E is a positive integer.
In some embodiments, the control message also includes a PDSCH-to-HARQ feedback timing indicator (e.g., k1) and a PRI. k1 may be used to determine a slot and the PRI may be used to determine PUCCH resources within the slot for transmission of a-CSI and HARQ-ACK. Note that the HARQ-ACK may be an acknowledgement to a PDSCH transmission scheduled by the control message or other PDSCH transmission. Further details regarding the determination of PUCCH resources based on k1 and/or PRI may be found in embodiment 5.
Example 4
As discussed in embodiment 2, the physical layer control message triggering a-CSI may simultaneously schedule PDSCH transmissions. In some embodiments, HARQ-ACK feedback corresponding to PDSCH transmission may be transmitted in the same PUCCH with a-CSI reports.
In some embodiments, the timeline information indicates at least a first time domain offset H21. FIG. 6A illustrates example timeline information in accordance with the present technology. Here, the reference signal(s) for CSI measurement is located after a time (which is denoted as H1) required for the UE to decode the PDCCH with the control message. The time domain position B21 is determined based on the following:
1. the time domain position B1 is determined by adding a time domain offset H1 to the end symbol of the PDCCH with the control message.
2. The time domain position B3 is determined by adding a time domain offset H3 to the end symbol of the PDSCH of the data. H3 represents the amount of time required for the UE to decode the data.
3. The time domain position B21 is determined by adding a time domain offset H21 to the end symbols of one or more Reference Signals (RSs) used for CSI measurement. The time-domain offset H21 ensures that the UE can have enough time to measure the reference signal(s), calculate the CSI accordingly, and encode the a-CSI report.
In some embodiments, the starting symbol of the PUCCH for a-CSI reporting is not earlier than or after the last time domain position among B1, B3, and B21, among B1, B3, and B21. In some embodiments, the starting symbol of the PUCCH for a-CSI reporting is not earlier than positions B3 and B21 or later than positions B3 and B21, whichever is later.
In some embodiments, the timeline information indicates at least a second time domain offset H22. FIG. 6B illustrates another example timeline information in accordance with the present techniques. Here, the reference signal(s) for CSI measurement are positioned before the time required for the UE to decode the PDCCH with the control message. Since the UE can only perform RS measurements after decoding the control message, the time domain position B22 is determined based on:
1. the time domain position B3 is determined by adding a time domain offset H3 to the end symbol of the PDSCH of the data. H3 represents the amount of time required for the UE to decode the data.
2. The time domain position B1 is determined by adding a time domain offset H1 to the end symbol of the PDCCH with the control message.
3. Time domain position B22 is determined by adding a time domain offset H22 to time domain position B1. The time domain offset H22 ensures that the UE can have enough time to measure the reference signal(s), calculate the CSI accordingly, and encode the a-CSI report.
In some embodiments, the starting symbol of the PUCCH for a-CSI reporting is not earlier than or after the last time domain position among B1, B3, and B22, or among B1, B3, and B22. In some embodiments, the starting symbol of the PUCCH for a-CSI reporting is not earlier than positions B3 and B22 or later than positions B3 and B22, whichever is later.
In some embodiments, the one or more reference signals comprise one or more of: CSI-RS, CSI interference measurement (CSI-IM), non-zero power (NZP) CSI-RS, demodulation reference signals (DMRS), or other signals. If the UE needs to measure multiple reference signals, a second time domain position B21 or B22 may be determined based on the end symbol of each reference signal to ensure that the UE has enough time to measure and calculate a-CSI for all reference signals.
In some embodiments, the value of H1 may be one of the following: n as defined in 3GPP TS38.213, or N as defined in TS38.214 pdsch . In some embodiments, the value of H3 may be one of the following: n1, N2, T defined in TS38.213 proc,1 、T proc,2 Or T proc,CSI . In some embodiments, the value of H21 or H22 may be one of the following: n1, N2, T defined in TS38.213 proc,1 、T proc,2 Or T proc,CSI . The value of H21 or H22 may also be one of the following: z, Z', T as defined in TS38.214 proc,CSI 。
In some embodiments, H1, H3, H21, and/or H22 may be one of: t defined in TS38.214 or TS38.213 proc,1 、N、N1、T proc,2 、N2、Z、Z'、T proc,CSI Or N3. When H1, H3, H21 and/or H22 is equal to T proc,1 When is at T proc,1 In (d) 1,1 Is set to 0. When H1, H3, H21 and/or H22 is equal to T proc,2 When is at T proc,2 In the middle will d 2,1 Is set to 0. H1, H3, H21, and/or H22 may also be set to other predetermined values.
In some embodiments, H1, H3, and H21 (or H22) are based on the minimum subcarrier spacing from the associated signal or channel related to a-CSI reporting. For example, if a subcarrier spacing of carriers for transmitting a control message on a PDCCH is 30KHz, a subcarrier spacing of carriers for transmitting one or more Reference Signals (RSs) for CSI measurement is 30KHz, a subcarrier spacing of carriers for transmitting a PDSCH is 60KHz, and a subcarrier spacing of carriers for carrying a PUCCH for a-CSI reporting is 60KHz, values of H1, H3, and H21 (or H22) are determined based on a minimum subcarrier spacing, which is 30 KHz.
After ascertaining B1, B3, and B21 as shown in fig. 6A (or alternatively, B3 and B22 as shown in fig. 6B), the PUCCH for a-CSI reporting may be determined accordingly. In some embodiments, referring back to fig. 6A, B21 is positioned later in time than B1 and B3. Similarly, as shown in fig. 6B, B22 is positioned later in time than B3. The uplink slot carrying the PUCCH for a-CSI reporting may be the R (e.g., R ═ 1) th uplink slot at or after B21 (or B22) that meets the requirements (e.g., has the required PUCCH format and sufficient payload). R is a positive integer. The uplink slots are located on the carrier of the PUCCH for a-CSI reporting. Further, PUCCH resources for a-CSI reporting in the uplink slot may be obtained according to the PRI in the control message. In some embodiments, the PUCCH resource for a-CSI reporting may be the E-th (e.g., E ═ 1) PUCCH resource at or after B21 (or B22) that meets the requirements (e.g., has a required format and sufficient payload) for transmission of a-CSI reports. E is a positive integer.
In some embodiments, the control message also includes a PDSCH-to-HARQ feedback timing indicator (e.g., k1) and a PRI. k1 may be used to determine a slot and the PRI may be used to determine PUCCH resources within the slot for transmission of a-CSI and HARQ-ACK. Note that the HARQ-ACK may be an acknowledgement to a PDSCH transmission scheduled by the control message or other PDSCH transmission. Further details regarding the determination of PUCCH resources based on k1 and/or PRI may be found in embodiment 5.
Example 5
For the scenarios described above, the time domain slots and uplink channel resources for transmitting a-CSI may be determined based on at least one of:
option 1: when the HARQ-ACK codebook and the triggered a-CSI are transmitted in the same uplink channel (e.g., PUCCH) in the same time domain slot, the uplink channel resources may be determined according to k1 (for the time domain slot) and PRI (for the PUCCH resource) in the last downlink control message (e.g., DCI) corresponding to the HARQ-ACK codebook.
Option 2: the HARQ-ACK codebook and the triggered a-CSI may be transmitted separately and/or potentially multiplexed to the same uplink resources according to the following example:
example (1): the uplink channel resources for a-CSI may be determined according to PRI (e.g., DCI) in the control message. The time domain slot for transmitting the a-CSI may be determined according to the details described in embodiment 1 or 3.
Example (2): if the trigger downlink control message is the last message corresponding to the HARQ-ACK codebook and the slot position of the a-CSI according to the details described in embodiment 1 or 3 is the same as the slot position indicated by k1 in the control message, the a-CSI and HARQ-ACK codebook may be multiplexed in the same uplink resource (e.g., PUCCH) indicated by the PRI in the control message.
Example (3): alternatively, if the trigger downlink control message is the last message corresponding to the HARQ-ACK codebook, the a-CSI and HARQ-ACK codebook may be multiplexed in the same uplink resource (e.g., PUCCH) indicated by k1 (for time domain slots) and PRI (for PUCCH resources) in the control message.
Fig. 7 illustrates an example of a wireless communication system 700 in which techniques in accordance with one or more embodiments of the present technology may be applied. The wireless communication system 700 may include one or more Base Stations (BSs) 705a, 705b, one or more wireless devices 710a, 710b, 710c, 710d, and a core network 725. Base stations 705a, 705b may provide wireless service to wireless devices 710a, 710b, 710c, and 710d in one or more wireless sectors. In some embodiments, the base stations 705a, 705b include directional antennas to generate two or more directional beams to provide wireless coverage in different sectors.
The core network 725 may communicate with one or more base stations 705a, 705 b. The core network 725 provides connectivity to other wireless and wireline communication systems. The core network may include one or more service subscription databases to store information related to subscribed wireless devices 710a, 710b, 710c, and 710 d. The first base station 705a may provide wireless service based on a first radio access technology, while the second base station 705b may provide wireless service based on a second radio access technology. Depending on the deployment scenario, the base stations 705a and 705b may be co-located or may be separately installed on site. Wireless devices 710a, 710b, 710c, and 710d may support a plurality of different radio access technologies. The techniques and embodiments described herein may be implemented by a base station of a wireless device described herein.
Fig. 8 is a block diagram representation of a portion of a wireless station in which techniques in accordance with one or more embodiments of the present technology may be applied. Wireless station 805, such as a base station or wireless device (or UE), may include processor electronics 810, such as a microprocessor, implementing one or more of the wireless technologies presented in this document. The wireless station 605 may include transceiver electronics 815 to transmit and/or receive wireless signals over one or more communication interfaces, such as an antenna 820. Wireless station 805 may include other communication interfaces for transmitting and receiving data. The wireless station 805 may include one or more memories (not explicitly shown) configured to store information, such as data and/or instructions. In some implementations, processor electronics 810 may include at least a portion of transceiver electronics 815. In some embodiments, at least some of the disclosed techniques, modules, or functions are implemented using a wireless station 805. In some embodiments, the wireless station 805 may be configured to perform the methods described herein.
It should be appreciated that this document discloses techniques that may be implemented in various embodiments to provide timeline information to reduce and/or eliminate timing delays for a-CSI reporting. The disclosed and other embodiments, modules, and functional operations described in this document can be implemented in digital electronic circuitry, or in computer software, firmware, or hardware, including the structures disclosed in this document and their structural equivalents, or in combinations of one or more of them. The disclosed and other embodiments may be implemented as one or more computer program products, i.e., one or more modules of computer program instructions encoded on a computer-readable medium for execution by, or to control the operation of, data processing apparatus. The computer readable medium can be a machine-readable storage device, a machine-readable storage substrate, a memory device, a composition of matter effecting a machine-readable propagated signal, or a combination of one or more of them. The term "data processing apparatus" includes all apparatus, devices, and machines for processing data, including by way of example a programmable processor, a computer, or multiple processors or computers. The apparatus can include, in addition to hardware, code that creates an execution environment for the computer program in question, e.g., code that constitutes processor firmware, a protocol stack, a database management system, an operating system, or a combination of one or more of them. The propagated signal is an artificially generated signal, e.g., a machine-generated electrical, optical, or electromagnetic signal, that is generated to encode information for transmission to suitable receiver apparatus.
A computer program (also known as a program, software application, script, or code) can be written in any form of programming language, including compiled or interpreted languages, and it can be deployed in any form, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing environment. A computer program does not necessarily correspond to a file in a file system. A program can be stored in a portion of a file that holds other programs or data (e.g., one or more scripts stored in a markup language document), in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files that store portions of one or more modules, sub programs, or code). A computer program can be deployed to be executed on one computer or on multiple computers that are located at one site or distributed across multiple sites and interconnected by a communication network.
The processes and logic flows described herein can be performed by one or more programmable processors executing one or more computer programs to perform functions by operating on input data and generating output. The processes and logic flows can also be performed by, and apparatus can also be implemented as, special purpose logic circuitry, e.g., an FPGA (field programmable gate array) or an ASIC (application specific integrated circuit).
Processors suitable for the execution of a computer program include, by way of example, both general and special purpose microprocessors, and any one or more processors of any kind of digital computer. Generally, a processor will receive instructions and data from a read-only memory or a random access memory or both. The essential elements of a computer are a processor for executing instructions and one or more memory devices for storing instructions and data. Generally, a computer will also include, or be operatively coupled to receive data from or transfer data to, or both, one or more mass storage devices for storing data, e.g., magnetic, magneto-optical disks, or optical disks. However, a computer does not require such a device. Computer-readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media and memory devices, including by way of example semiconductor memory devices (e.g., EPROM, EEPROM, and flash memory devices); magnetic disks (e.g., internal hard disks or removable disks); magneto-optical disks; and CD ROM and DVD-ROM disks. The processor and the memory can be supplemented by, or incorporated in, special purpose logic circuitry.
While this patent document contains many specifics, these should not be construed as limitations on the scope of any invention or of what may be claimed, but rather as descriptions of features specific to particular embodiments of particular inventions. Certain features that are described in this patent document in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination. Moreover, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a subcombination or variation of a subcombination.
Similarly, while operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. Moreover, the separation of various system components in the embodiments described in this patent document should not be understood as requiring such separation in all embodiments.
Only a few embodiments and examples are described and other implementations, enhancements and variations can be made based on what is described and shown in this patent document.

Claims (32)

1. A method of wireless communication, comprising:
transmitting, by a base station, a control message to a user equipment on a first control channel, the control message triggering transmission of a channel state information, CSI, report from the user equipment to the base station on a second control channel;
transmitting, by the base station, a reference signal to the user equipment; and
receiving, by the base station, the CSI report on the second control channel according to timeline information associated with reception of a reference signal by the user equipment, the timeline information indicating a time-domain starting position of transmission of the CSI report on the second control channel.
2. The method of claim 1, wherein the timeline information comprises a first indicator indicating a first time domain offset from completion of the user equipment receiving the reference signal.
3. The method of claim 2, wherein the timeline information includes a second indicator that indicates a second time-domain offset from completion of the user equipment receiving the message.
4. The method of claim 3, wherein a time domain starting position of transmission of the CSI report is no earlier than (1) a first time domain position determined by the first time domain offset, and (2) a second time domain position determined by the second time domain offset.
5. The method of claim 2, wherein the timeline information includes a third indicator indicating a third time domain offset from completion of decoding control messages on the first control channel.
6. The method of claim 5, wherein a time domain starting position of transmission of the CSI report is no earlier than (1) a first time domain position determined by the first time domain offset, and (2) a third time domain position determined by the third time domain offset.
7. The method of any one or more of claims 1 to 6, comprising:
receiving a response to a data transmission and the CSI report according to the timeline information.
8. The method of any one or more of claims 1 to 7, comprising:
performing, by the base station, data transmission to the user equipment according to the control message.
9. The method of claim 8, wherein the timeline information comprises a fourth indicator that indicates a fourth time domain offset from completion of the user equipment receiving the data transmission.
10. The method of claim 9, wherein a time domain starting position of transmission of the CSI report is no earlier than (1) a first time domain position determined by the first time domain offset, and (2) a fourth time domain position determined by the fourth time domain offset.
11. The method of claim 9, wherein a time domain starting position of the transmission of the CSI report is no earlier than (1) a first time domain position determined by the first time domain offset, (2) a third time domain position determined by the third time domain offset, and (3) a fourth time domain position determined by the fourth time domain offset.
12. The method according to any of claims 1 to 11, wherein the timeline information indicates resources to be used for the CSI reporting.
13. The method of claim 12, wherein the resources comprise time domain slots for the CSI reports.
14. The method of claim 12, wherein the resources comprise Physical Uplink Control Channel (PUCCH) resources.
15. The method of any one or more of claims 1-14, wherein at least one of the first, second, third, or fourth time domain offsets is specified in a protocol cluster.
16. A method of wireless communication, comprising:
receiving, by a user equipment from a base station, a control message on a first control channel, the control message triggering transmission of a channel state information, CSI, report from the user equipment to the base station on a second control channel;
receiving, by the user equipment, a reference signal from the base station; and
transmitting, by the user equipment, the CSI report on the second control channel according to timeline information associated with reception of the reference signal, the timeline information indicating a time-domain starting position of transmission of the CSI report.
17. The method of claim 16, wherein the timeline information comprises a first indicator indicating a first time domain offset from completion of the user equipment receiving the reference signal.
18. The method of claim 17, wherein the timeline information comprises a second indicator indicating a second time domain offset from completion of the user equipment receiving the message.
19. The method of claim 18, wherein a time domain starting position of transmission of the CSI report is no earlier than (1) a first time domain position determined by the first time domain offset, and (2) a second time domain position determined by the second time domain offset.
20. The method of claim 17, wherein the timeline information includes a third indicator indicating a third time domain offset from completion of decoding control messages on the first control channel.
21. The method of claim 20, wherein a time domain starting position of the transmission of the CSI report is no earlier than (1) a first time domain position determined by the first time domain offset, and (2) a third time domain position determined by the third time domain offset.
22. The method of any one or more of claims 16 to 21, comprising:
transmitting an acknowledgement to a data transmission and the CSI report according to the timeline information.
23. The method of any one or more of claims 16 to 22, comprising:
receiving, by the user equipment, a data transmission from the base station according to the control message.
24. The method of claim 23, wherein the timeline information comprises a fourth indicator indicating a fourth time domain offset from completion of the user equipment receiving the data transmission.
25. The method of claim 24, wherein a time domain starting position of the transmission of the CSI report is no earlier than (1) a first time domain position determined by the first time domain offset, and (2) a fourth time domain position determined by the fourth time domain offset.
26. The method of claim 24, wherein a time domain starting position of transmission of the CSI report is no earlier than (1) a first time domain position determined by the first time domain offset, (2) a third time domain position determined by the third time domain offset, and (3) a fourth time domain position determined by the fourth time domain offset.
27. The method according to any of claims 16 to 26, wherein the timeline information indicates resources to be used for the CSI report.
28. The method of claim 27, wherein the resources comprise time domain slots for the CSI reports.
29. The method of claim 27, wherein the resources comprise Physical Uplink Control Channel (PUCCH) resources.
30. The method of any one or more of claims 16-29, wherein at least one of the first, second, third, or fourth time domain offsets is specified in a protocol cluster.
31. A communications apparatus comprising a processor configured to implement the method of any one or more of claims 1 to 30.
32. A computer program product having code stored thereon, the code, when executed by a processor, causing the processor to implement a method as claimed in any one or more of claims 1 to 30.
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