阅读说明：本技术 用于高可靠性的调制和编码方案以及信道质量指示符 (Modulation and coding scheme and channel quality indicator for high reliability ) 是由 G·萨尔基斯 蒋靖 Y·王 杨阳 杨桅 J·B·索里亚加 李治平 于 2019-02-15 设计创作，主要内容包括：本公开的某些方面提供了用于确定用于超可靠低等待时间通信(URLLC)的调制和编码方案(MCS)以及信道质量指示符(CQI)的技术和设备(装置)。一种示例性方法一般包括：从用户装备(UE)接收信道质量指示符(CQI),以及使用该CQI来从调制和编码方案(MCS)表中检索参数,其中该表具有与被选择以允许BS在低频谱效率(SE)值下高效分配资源以达成至少一目标块差错率(BLER)的不同SE值相对应的条目。该方法还包括基于所检索的参数来向该UE发送传输。(Certain aspects of the present disclosure provide techniques and apparatus (devices) for determining a Modulation and Coding Scheme (MCS) and a Channel Quality Indicator (CQI) for ultra-reliable low latency communications (URLLC). An exemplary method generally includes: the method includes receiving a Channel Quality Indicator (CQI) from a User Equipment (UE), and using the CQI to retrieve parameters from a Modulation and Coding Scheme (MCS) table, wherein the table has entries corresponding to different block error rates (BLERs) values selected to allow the BS to efficiently allocate resources at low SE values to achieve at least a target BLER. The method also includes sending a transmission to the UE based on the retrieved parameters.)

1. A method for wireless communications by a Base Station (BS), comprising:

receiving a Channel Quality Indicator (CQI) from a User Equipment (UE);

using the CQI to retrieve parameters from a Modulation and Coding Scheme (MCS) table having entries corresponding to different Spectral Efficiency (SE) values selected to allow the BS to efficiently allocate resources at low SE values to achieve at least a target BLER; and

sending a transmission to the UE based on the retrieved parameters.

2. The method of claim 1, wherein the MCS table has an entry corresponding to a minimum SE value included in a CQI table used by the UE to select the CQI.

3. The method of claim 1, wherein the SE values are selected such that a step size of a signal-to-noise ratio (SNR) is smaller for low SE values at the target BLER.

4. The method of claim 1, wherein the SE value is selected such that a difference in allocated Resource Blocks (RBs) between adjacent entries in the MCS table is within a threshold limit.

5. The method of claim 1, wherein:

the UE is configured to support a first type of service, and

the set of SE values is determined based on interpolating the SE values from an MCS table for a UE configured to support the second type of service.

6. The method of claim 1, wherein:

the UE is configured to support a first type of service, and

the set of SE values is determined based on interpolating performance metrics from an MCS table for a UE configured to support the second type of service.

7. The method of claim 1, further comprising determining a Rank Indicator (RI) value based at least in part on the received CQI.

8. The method of claim 7, wherein:

mapping one or more CQI values of the first set to RI values of the first set; and is

The second set of one or more CQI values is mapped to the second set of RI values.

9. The method of claim 8, wherein:

the first set of CQI values comprises CQI values less than or equal to a threshold; and is

The second set of CQI values includes CQI values greater than the threshold.

10. The method of claim 8, wherein the CQI value determines a number of bits used to convey the RI value.

11. A method for wireless communications by a User Equipment (UE), comprising:

determining a Channel Quality Indicator (CQI) based on measurements of a signal from a base station;

determining a Rank Indicator (RI) value; and

signaling the CQI to the base station, wherein a CQI value is used to indicate the RI value.

12. The method of claim 11, wherein:

mapping one or more CQI values of the first set to RI values of the first set; and is

The second set of one or more CQI values is mapped to the second set of RI values.

13. The method of claim 12, wherein:

the first set of CQI values comprises CQI values less than or equal to a threshold; and is

The second set of CQI values includes CQI values greater than the threshold.

14. The method of claim 11, wherein the CQI value determines a number of bits used to convey the RI value.

15. An apparatus for wireless communication, comprising:

an interface configured to:

obtaining a Channel Quality Indicator (CQI) from a User Equipment (UE), an

Sending a transmission to the UE based on the retrieved parameters; and

a processing system configured to: the CQI is used to retrieve parameters from a Modulation and Coding Scheme (MCS) table having entries corresponding to different Spectral Efficiency (SE) values selected to allow the BS to efficiently allocate resources at low SE values to achieve at least a target block error rate (BLER).

16. An apparatus for wireless communication, comprising:

a processing system configured to:

determining a Channel Quality Indicator (CQI) based on measurements of signals from the base station, an

Determining a Rank Indicator (RI) value; and

an interface configured to: signaling the CQI to the base station, wherein a CQI value is used to indicate the RI value.

17. An apparatus for wireless communication, comprising:

means for receiving a Channel Quality Indicator (CQI) from a User Equipment (UE);

means for using the CQI to retrieve parameters from a Modulation and Coding Scheme (MCS) table, wherein the table has entries corresponding to different Spectral Efficiency (SE) values selected to allow the BS to efficiently allocate resources at low SE values to achieve at least a target BLER; and

means for sending a transmission to the UE based on the retrieved parameters.

18. An apparatus for wireless communication, comprising:

means for determining a Channel Quality Indicator (CQI) based on measurements of signals from a base station;

means for determining a Rank Indicator (RI) value; and

means for signaling the CQI to the base station, wherein a CQI value is used to indicate the RI value.

19. A computer-readable medium for wireless communication comprising code, which, when executed by at least one processor, causes the at least one processor to:

obtaining a Channel Quality Indicator (CQI) from a User Equipment (UE);

using the CQI to retrieve parameters from a Modulation and Coding Scheme (MCS) table having entries corresponding to different Spectral Efficiency (SE) values selected to allow the BS to efficiently allocate resources at low SE values to achieve at least a target BLER; and

sending a transmission to the UE based on the retrieved parameters.

20. A computer-readable medium for wireless communication comprising code, which, when executed by at least one processor, causes the at least one processor to:

determining a Channel Quality Indicator (CQI) based on measurements of a signal from a base station;

determining a Rank Indicator (RI) value; and

signaling the CQI to the base station, wherein a CQI value is used to indicate the RI value.

Description of the related Art

Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple-access techniques capable of supporting communication with multiple users by sharing the available system resources (e.g., bandwidth, transmit power). Examples of such multiple-access techniques include Long Term Evolution (LTE) systems, Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.

In some examples, a wireless multiple-access communication system may include several base stations, each supporting communication for multiple communication devices (otherwise referred to as User Equipments (UEs)) simultaneously. In an LTE or LTE-a network, a set of one or more base stations may define an evolved node B (eNB). In other examples (e.g., in a next generation or 5G network), a wireless multiple-access communication system may include a number of Distributed Units (DUs) (e.g., Edge Units (EUs), Edge Nodes (ENs), Radio Heads (RHs), intelligent radio heads (SRHs), Transmit Receive Points (TRPs), etc.) in communication with a number of Central Units (CUs) (e.g., Central Nodes (CNs), Access Node Controllers (ANCs), etc.), wherein a set including one or more distributed units in communication with a central unit may define an access node (e.g., a new radio base station (NR BS), a new radio B node (NR NB), a network node, 5 GNBs, etc.). A base station or DU may communicate with a group of UEs on downlink channels (e.g., for transmissions from or to the base station) and uplink channels (e.g., for transmissions from the UEs to the base station or distributed unit).

These multiple access techniques have been adopted in various telecommunications standards to provide a common protocol that enables different wireless devices to communicate on a city, country, region, and even global level. An example of an emerging telecommunications standard is New Radio (NR), e.g., 5G radio access. NR is an enhanced set of LTE mobile standards promulgated by the third generation partnership project (3 GPP). It is designed to better support mobile broadband internet access by improving spectral efficiency, reducing costs, improving services, utilizing new spectrum, and better integrating with other open standards using OFDMA with Cyclic Prefix (CP) on Downlink (DL) and Uplink (UL), and to support beamforming, Multiple Input Multiple Output (MIMO) antenna techniques, and carrier aggregation.

However, as the demand for mobile broadband access continues to grow, there is a need for further improvements in NR technology. Preferably, these improvements should be applicable to other multiple access techniques and telecommunications standards employing these techniques.

Brief summary

The systems, methods, and devices of the present disclosure each have several aspects, no single one of which is solely responsible for its desirable attributes. Without limiting the scope of the present disclosure as expressed by the claims which follow, some features will now be discussed briefly. After considering this discussion, and particularly after reading the section entitled "detailed description" one will understand how the features of this disclosure provide advantages that include improved communications between access points and stations in a wireless network.

Certain aspects of the present disclosure provide a method for wireless communication, which may be performed, for example, by a Base Station (BS). The method generally includes: the method includes receiving a Channel Quality Indicator (CQI) from a User Equipment (UE), and using the CQI to retrieve parameters from a Modulation and Coding Scheme (MCS) table, wherein the table has entries corresponding to different block error rates (BLERs) values selected to allow the BS to efficiently allocate resources at low SE values to achieve at least a target BLER. The method also includes sending a transmission to the UE based on the retrieved parameters.

Certain aspects of the present disclosure provide a method for wireless communication, such as may be performed by a User Equipment (UE). The method generally includes: the method includes determining a Channel Quality Indicator (CQI) based on measurements of a signal from a base station, determining a Rank Indicator (RI) value, and signaling the CQI to the base station, wherein the CQI value is used to indicate the RI value.

Aspects generally include methods, apparatuses, systems, computer-readable media, and processing systems substantially as described herein with reference to and as illustrated by the accompanying figures.

To the accomplishment of the foregoing and related ends, the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed and the present description is intended to include all such aspects and their equivalents.