High-reliability modulation coding scheme and logical channel prioritization
地域：
CA
CA San Diego
摘要
Methods, systems, and devices for wireless communications are described. A base station in a wireless communications system may perform a connection procedure (e.g. radio resource control (RRC) procedure) with a user equipment (UE), during which the base station may configure the UE with logical channel prioritization (LCP) configuration for each logical channel of a set of logical channels. The LCP configuration may indicate allowable modulation coding schemes (MCSs) for each logical channel of the set of logical channels. Following the communication procedure, the UE may receive an uplink grant for transmitting data using a corresponding logical channel of the set of logical channels. The UE may identify an MCS used by the uplink grant and may transmit the data using the corresponding logical channel with the identified MCS, based on the identified MCS of the uplink grant matching an MCS of the logical channel.
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The present Application for Patent claims the benefit of U.S. Provisional Patent Application No. 62/687,720 by He, entitled “HIGH-RELIABILITY MODULATION CODING SCHEME AND LOGICAL CHANNEL PRIORITIZATION,” filed Jun. 20, 2018, assigned to the assignee hereof, and expressly incorporated herein.
The following relates generally to wireless communications, and more specifically to high-reliability modulation coding scheme (MCS) and logical channel prioritization (LCP).
Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), or discrete Fourier transform-spread-OFDM (DFT-S-OFDM). A wireless multiple-access communications system may include a number of base stations or network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE).
權(quán)利要求
What is claimed is:1. A method for wireless communications, comprising:receiving a logical channel prioritization (LCP) configuration for each logical channel of a set of logical channels during a connection procedure with a base station, the LCP configuration indicating allowable modulation coding schemes (MCSs) for each logical channel of the set of logical channels; receiving an uplink grant for transmitting data using a corresponding logical channel of the set of logical channels, an error detection code and a network identifier associated with the uplink grant indicating an MCS associated with the uplink grant; identifying the MCS associated with the received uplink grant based at least in part on the error detection code and the network identifier; comparing the MCS associated with the received uplink grant and the allowable MCSs for the corresponding logical channel; and transmitting the data using the corresponding logical channel with the identified MCS based at least in part on the comparing. 2. The method of claim 1 , further comprising:refraining from using the corresponding logical channel for the received uplink grant based at least in part on the MCS associated with the received uplink grant being different from the allowable MCSs for the corresponding logical channel. 3. The method of claim 1 , further comprising:identifying a second corresponding logical channel from the set of logical channels configured with the MCS associated with the received uplink grant based at least in part on comparing the MCS associated with the received uplink grant with the allowable MCSs for the second corresponding logical channel; and selecting the second corresponding logical channel for transmitting the data based at least in part on the allowable MCSs configured for the second corresponding logical channel including the MCS associated with the received uplink grant. 4. The method of claim 1 , further comprising:identifying the allowable MCSs for each logical channel of the set of logical channels based at least in part on an indication in a field of a logical channel configuration information element (IE) in the LCP configuration. 5. The method of claim 1 , further comprising:identifying the MCS associated with the received uplink grant based at least in part on at least one transmission parameter associated with the received uplink grant; and comparing the MCS associated with the received uplink grant with the allowable MCSs indicated in the LCP configuration for the corresponding logical channel based at least in part on identifying the MCS using the at least one transmission parameter. 6. The method of claim 1 , further comprising:determining a set of allowed subcarrier spacing index values in a field of the LCP configuration for the corresponding logical channel of the set of logical channels; identifying that the set of allowed subcarrier spacing index values in the field of the LCP configuration for the corresponding logical channel comprises a subcarrier spacing index associated with the received uplink grant; and determining whether to use the corresponding logical channel for the received uplink grant based at least in part on determining that the set of allowed subcarrier spacing index values in the field of the LCP configuration comprise the subcarrier spacing index associated with the received uplink grant, wherein transmitting the data using the corresponding logical channel is further based at least in part on the determining. 7. The method of claim 1 , further comprising:determining that a maximum physical uplink shared channel (PUSCH) transmission duration indicated in the LCP configuration for the corresponding logical channel is greater than or equal to a PUSCH transmission duration associated with the received uplink grant; and determining whether to use the corresponding logical channel for the received uplink grant based at least in part on determining that the maximum PUSCH transmission duration indicated in the LCP configuration is greater than or equal to the PUSCH transmission duration associated with the received uplink grant, wherein transmitting the data using the corresponding logical channel is further based at least in part on the determining. 8. The method of claim 1 , further comprising:determining an uplink grant type in a field of the LCP configuration; comparing a type of the received uplink grant with the uplink grant type in the field of the LCP configuration; and determining whether to use the corresponding logical channel for the received uplink grant based at least in part on comparing the type of the received uplink grant with the uplink grant type in the field of the LCP configuration, wherein transmitting the data using the corresponding logical channel is further based at least in part on the determining. 9. The method of claim 1 , further comprising:identifying cell information associated with the base station based at least in part on at least one transmission parameter of the uplink grant; comparing the identified cell information with cell information in a field of the LCP configuration; and determining whether to use the corresponding logical channel for the received uplink grant based at least in part on comparing the identified cell information with the cell information in the field of the LCP configuration, wherein transmitting the data using the corresponding logical channel is further based at least in part on the determining. 10. The method of claim 1 , wherein the connection procedure comprises a radio resource control (RRC) procedure. 11. A method for wireless communications, comprising:generating a logical channel prioritization (LCP) configuration for each logical channel of a set of logical channels associated with a user equipment (UE), the LCP configuration indicating allowable modulation coding schemes (MCSs) for each logical channel of the set of logical channels; transmitting the LCP configuration to the UE during a connection procedure with the UE; transmitting to the UE an uplink grant for transmitting data using a corresponding logical channel of the set of logical channels, an error detection code and a network identifier associated with the uplink grant indicating an MCS and information associated with one or more transmission parameters of the uplink grant; and receiving the data using the corresponding logical channel with the MCS based at least in part on a comparison between the MCS associated with the uplink grant and the allowable MCSs for the corresponding logical channel. 12. The method of claim 11 , further comprising:scrambling a cyclic redundancy check (CRC), in a downlink control information (DCI), with a radio network temporary identifier (RNTI) and a cell-RNTI (C-RNTI), wherein transmitting the uplink grant is further based at least in part on the scrambling. 13. The method of claim 10 , further comprising:selecting one or more physical downlink control channel (PDCCH) candidates for transmitting the uplink grant, wherein the PDCCH candidates are associated with a UE-specific search space or a common search space, wherein transmitting the uplink grant is further based at least in part on using the PDCCH candidates. 14. The method of claim 11 , wherein the connection procedure comprises a radio resource control (RRC) procedure. 15. An apparatus for wireless communications, comprising: a processor, memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to:receive a logical channel prioritization (LCP) configuration for each logical channel of a set of logical channels during a connection procedure with a base station, the LCP configuration indicating allowable modulation coding schemes (MCSs) for each logical channel of the set of logical channels; receive an uplink grant for transmitting data using a corresponding logical channel of the set of logical channels, an error detection code and a network identifier associated with the uplink grant indicating an MCS associated with the uplink grant; identify the MCS associated with the received uplink grant based at least in part on the error detection code and the network identifier; compare the MCS associated with the received uplink grant and the allowable MCSs for the corresponding logical channel; and transmit the data using the corresponding logical channel with the identified MCS based at least in part on the comparing. 16. The apparatus of claim 15 , wherein the instructions are further executable by the processor to cause the apparatus to:refrain from using the corresponding logical channel for the received uplink grant based at least in part on the MCS associated with the received uplink grant being different from the allowable MCSs for the corresponding logical channel. 17. The apparatus of claim 15 , wherein the instructions are further executable by the processor to cause the apparatus to:identify a second corresponding logical channel from the set of logical channels configured with the MCS associated with the received uplink grant based at least in part on comparing the MCS associated with the received uplink grant with the allowable MCSs for the second corresponding logical channel; and select the second corresponding logical channel for transmitting the data based at least in part on the allowable MCSs configured for the second corresponding logical channel including the MCS associated with the received uplink grant. 18. The apparatus of claim 15 , wherein the instructions are further executable by the processor to cause the apparatus to:identify the allowable MCSs for each logical channel of the set of logical channels based at least in part on an indication in a field of a logical channel configuration information element (IE) in the LCP configuration. 19. The apparatus of claim 15 , wherein the instructions are further executable by the processor to cause the apparatus to:identify the MCS associated with the received uplink grant based at least in part on at least one transmission parameter associated with the received uplink grant; and compare the MCS associated with the received uplink grant with the allowable MCSs indicated in the LCP configuration for the corresponding logical channel based at least in part on identifying the MCS using the at least one transmission parameter. 20. The apparatus of claim 15 , wherein the instructions are further executable by the processor to cause the apparatus to:determine a set of allowed subcarrier spacing index values in a field of the LCP configuration for the corresponding logical channel of the set of logical channels; identify that the set of allowed subcarrier spacing index values in the field of the LCP configuration for the corresponding logical channel comprises a subcarrier spacing index associated with the received uplink grant; and determine whether to use the corresponding logical channel for the received uplink grant based at least in part on determining that the set of allowed subcarrier spacing index values in the field of the LCP configuration comprise the subcarrier spacing index associated with the received uplink grant, wherein transmitting the data using the corresponding logical channel is further based at least in part on the determining. 21. The apparatus of claim 15 , wherein the instructions are further executable by the processor to cause the apparatus to:determine that a maximum physical uplink shared channel (PUSCH) transmission duration indicated in the LCP configuration for the corresponding logical channel is greater than or equal to a PUSCH transmission duration associated with the received uplink grant; and determine whether to use the corresponding logical channel for the received uplink grant based at least in part on determining that the maximum PUSCH transmission duration indicated in the LCP configuration is greater than or equal to the PUSCH transmission duration associated with the received uplink grant, wherein transmitting the data using the corresponding logical channel is further based at least in part on the determining. 22. The apparatus of claim 15 , wherein the instructions are further executable by the processor to cause the apparatus to:determine an uplink grant type in a field of the LCP configuration; compare a type of the received uplink grant with the uplink grant type in the field of the LCP configuration; and determine whether to use the corresponding logical channel for the received uplink grant based at least in part on comparing the type of the received uplink grant with the uplink grant type in the field of the LCP configuration, wherein transmitting the data using the corresponding logical channel is further based at least in part on the determining. 23. The apparatus of claim 15 , wherein the instructions are further executable by the processor to cause the apparatus to:identify cell information associated with the base station based at least in part on at least one transmission parameter of the uplink grant; compare the identified cell information with cell information in a field of the LCP configuration; and determine whether to use the corresponding logical channel for the received uplink grant based at least in part on comparing the identified cell information with the cell information in the field of the LCP configuration, wherein transmitting the data using the corresponding logical channel is further based at least in part on the determining. 24. The apparatus of claim 15 , wherein the connection procedure comprises a radio resource control (RRC) procedure. 25. An apparatus for wireless communications, comprising: a processor, memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to:generate a logical channel prioritization (LCP) configuration for each logical channel of a set of logical channels associated with a user equipment (UE), the LCP configuration indicating allowable modulation coding schemes (MCSs) for each logical channel of the set of logical channels; transmit the LCP configuration to the UE during a connection procedure with the UE; and transmit to the UE an uplink grant for transmitting data using a corresponding logical channel of the set of logical channels, an error detection code and a network identifier associated with the uplink grant indicating an MCS and information associated with one or more transmission parameters of the uplink grant; receive the data using the corresponding logical channel with the MCS based at least in part on a comparison between the MCS associated with the uplink grant and the allowable MCSs for the corresponding logical channel. 26. The apparatus of claim 25 , wherein the instructions are further executable by the processor to cause the apparatus to:scramble a cyclic redundancy check (CRC), in a downlink control information (DCI), with a radio network temporary identifier (RNTI) and a cell-RNTI (C-RNTI), wherein transmitting the uplink grant is further based at least in part on the scrambling. 27. The apparatus of claim 25 , wherein the instructions are further executable by the processor to cause the apparatus to:select one or more physical downlink control channel (PDCCH) candidates for transmitting the uplink grant, wherein the PDCCH candidates are associated with a UE-specific search space or a common search space, wherein transmitting the uplink grant is further based at least in part on using the PDCCH candidates. 28. The apparatus of claim 25 , wherein the connection procedure comprises a radio resource control (RRC) procedure.
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