EP4104326A1 - Modulation and coding scheme table to resource set associations for multi-transmit receive point operation - Google Patents
Modulation and coding scheme table to resource set associations for multi-transmit receive point operationInfo
- Publication number
- EP4104326A1 EP4104326A1 EP20839025.2A EP20839025A EP4104326A1 EP 4104326 A1 EP4104326 A1 EP 4104326A1 EP 20839025 A EP20839025 A EP 20839025A EP 4104326 A1 EP4104326 A1 EP 4104326A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- modulation
- coding scheme
- resource set
- signal
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
- H04L1/0016—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy involving special memory structures, e.g. look-up tables
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0025—Transmission of mode-switching indication
-
- 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
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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- 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
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1438—Negotiation of transmission parameters prior to communication
- H04L5/1453—Negotiation of transmission parameters prior to communication of modulation type
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
- H04L1/0005—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes applied to payload information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
- H04L1/0011—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding applied to payload information
Definitions
- Some example embodiments may generally relate to mobile or wireless telecommunication systems, such as Long Term Evolution (LTE) or fifth generation (5G) radio access technology or new radio (NR) access technology, or other communications systems.
- LTE Long Term Evolution
- 5G fifth generation
- NR new radio
- certain embodiments may be directed to systems and/or methods relating to multi-downlink control information (DCI) multi-transmit receive point (TRP) operation.
- DCI multi-downlink control information
- TRP receive point
- Examples of mobile or wireless telecommunication systems may include the Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN), Long Term Evolution (LTE) Evolved UTRAN (E-UTRAN), LTE-Advanced (LTE-A), MulteFire, LTE- A Pro, fifth generation (5G) radio access technology or new radio (NR) access technology, IEEE 802.11 based technologies, and/or Wi-Fi technologies.
- 5G wireless systems refer to the next generation (NG) of radio systems and network architecture.
- a 5G system is mostly built on a 5G new radio (NR), but a 5G (or NG) network can also build on the E-UTRA radio.
- NR provides bitrates on the order of 10-20 Gbit/s or higher, and can support at least service categories such as enhanced mobile broadband (eMBB) and ultra-reliable low-latency- communication (URLLC) as well as massive machine type communication (mMTC).
- eMBB enhanced mobile broadband
- URLLC ultra-reliable low-latency- communication
- mMTC massive machine type communication
- NR is expected to deliver extreme broadband and ultra-robust, low latency connectivity and massive networking to support the Internet of Things (IoT).
- IoT and machine-to-machine (M2M) communication With IoT and machine-to-machine (M2M) communication becoming more widespread, there will be a growing need for networks that meet the needs of lower power, low data rate, and long battery life.
- the next generation radio access network (NG-RAN) represents the RAN for 5G, which can provide both NR and LTE (and LTE- Advanced) radio accesses.
- the nodes that can provide radio access functionality to a user equipment may be named next-generation NB (gNB) when built on NR radio and may be named next-generation eNB (NG-eNB) when built on E-UTRA radio.
- gNB next-generation NB
- NG-eNB next-generation eNB
- FIG. 1 illustrates an example system depicting separate PDCCH sent via different TRPs to schedule PD SCH transmissions, according to an embodiment
- FIG. 2 illustrates an example system depicting the use of CORESET groups to relate the MCS tables, according to an embodiment
- Fig. 3a illustrates an example of a PDSCH configuration information element (IE), according to an embodiment
- Fig. 3b illustrates an example table depicting the PDSCH configuration field descriptions, according to an embodiment
- FIG. 4a illustrates an example flow diagram of a method, according to an embodiment
- Fig. 4b illustrates an example flow diagram of a method, according to an embodiment
- FIG. 5a illustrates an example block diagram of an apparatus, according to an embodiment
- Fig. 5b illustrates an example block diagram of an apparatus, according to an embodiment.
- multi -TRP was considered an important component due to the benefits of eMBB operations, as well as the capability of improving reliability for the URLLC services.
- enhancements on the support for multi-TRP deployment targeting both frequency range 1 (FR1) and frequency range 2 (FR2).
- These enhancements may comprise: specifying features to improve reliability and robustness for channels other than physical downlink shared channel (PDSCH) (e.g., physical downlink control channel (PDCCH), physical uplink shared channel (PUSCH), and physical uplink control channel (PUCCH)) using multi-TRP and/or multi -panel with Release- 16 reliability features as the baseline, specifying quasi-co-location (QCL)/transmission configuration indication (TCI)-related enhancements to enable inter-cell multi-TRP operations assuming multi-DCI based multi-PDSCH reception, specifying (if needed) beam-management-related enhancements for simultaneous multi- TRP transmission with multi-panel reception, and enhancements to support HST-SFN deployment scenario, such as specifying solution(s) on QCL assumption for demodulation reference signal (DMRS) (e.g., multiple QCL assumptions for the same DMRS
- DMRS demodulation reference signal
- certain embodiments may relate to further enhancements on multiple PDCCH based multi-TRP transmission.
- the following RRC configuration may be used to link multiple PDCCH/PDSCH pairs with multiple TRPs: one control resource set (CORESET) in a PDCCH configuration ( PDCCH-config ) corresponds to one TRP.
- CORESET control resource set
- PDCCH-config PDCCH configuration
- a UE is configured by higher layer parameter PDCCH-config that contains two different values of a CORESET pool index ( CORESETPoolIndex ) in ControlResourceSet for the active bandwidth part (BWP) of a serving cell
- the UE may expect to receive multiple PDCCHs scheduling fully, partially, and/or non-overlapped PDSCHs in time and frequency domain subject to UE capability. This may allow a UE to be not configured with either joint hybrid automatic repeat request (HARQ) acknowledgement (ACK) feedback or separate HARQ ACK feedback.
- HARQ joint hybrid automatic repeat request
- ACK acknowledgement
- the UE may assume that the CORESET is assigned with CORESETPoolIndex as 0.
- Multi-link association may mean that a station may have multiple links towards an access point (AP) within a single association. In other scenarios, the station may have simultaneously multiple associations, each towards different APs.
- AP access point
- multi -AP association may have common aspects with 3GPP multi-TRP technology. Therefore, as said, the example embodiments described herein may be applicable to IEEE 802.11 and/or Wi-Fi. In those embodiments, an AP may correspond to a TRP.
- PDCCHs schedule two PDSCHs/PUSCHs across TRPs, i.e., PDCCHs are associated with different values of CORESETPoolIndex, following operations are allowed: PDCCH to PDSCH, PDCCH to PUSCH, and PDSCH to HARQ-ACK.
- PDCCH to PDSCH operation for any two HARQ process IDs in a given scheduled cell, if the UE is scheduled to start receiving a first PDSCH starting in symbol j by a PDCCH associated with a value of CORESETPoolIndex ending in symbol i, the UE can be scheduled to receive a PDSCH starting earlier than the end of the first PDSCH with a PDCCH associated with a different value of CORESETPoolIndex that ends later than symbol i.
- PDCCH to PUSCH operation for any two HARQ process IDs in a given scheduled cell, if the UE is scheduled to start a first PUSCH transmission starting in symbol j by a PDCCH associated with a value of CORESETPoolIndex ending in symbol i, the UE can be scheduled to transmit a PUSCH starting earlier than the end of the first PUSCH by a PDCCH associated with a different value of CORESETPoolIndex that ends later than symbol i. It is noted that, from the UE perspective, this does not imply overlapped PUSCHs at the time.
- the UE can receive a first PDSCH in slot i, with the corresponding HARQ-ACK assigned to be transmitted in slot j, and a second PDSCH associated with a CORESETPoolIndex different from the first PDSCH starting later than the first PDSCH with its corresponding HARQ-ACK assigned to be transmitted in a slot before slot j .
- the above operations are optional for a UE that supports multi-DCI based multi-TRP. For the CORESET without CORESETPoolIndex, the UE may assume that the
- CORESET is assigned with CORESETPoolIndex as 0.
- certain embodiments may relate to multi-DCI multi-TRP schemes in which a UE may receive from multiple transmission reception points (TRPs), and where TRPs may schedule their downlink transmission towards the UE independently of each other.
- TRPs transmission reception points
- this has been enabled such that, if a UE has received RRC configuration parameter PDCCH- Config with two different values of CoresetPoolIndex, with the values associated to different TRPs, the UE may receive multiple PDCCHs (from these different TRPs) scheduling fully, partially and/or non-overlapped PDSCHs in time and frequency domain.
- CoresetPoolIndex may be used to indicate where to find PDSCHs in time-frequency space. However, it does not carry information relating to modulation and coding schemes (MCS), such as indications of which MCS table should be used.
- MCS modulation and coding schemes
- Release- 16 multi-DCI based multi-TRP scheme is widely applicable for all the channel conditions of TRP-to-UE, and for ideal and non-ideal backhaul between TRP.
- the framework provided in multi-DCI based multi-TRP transmission can be used for eMBB, as well as for URLLC and mixed service support.
- a benefit compared to a single DCI based multi- TRP transmission is the freedom provided in the scheduling and possibility to provide good performance even when the TRP-UE channels have significant variations.
- Fig. 1 illustrates an example system diagram in which separate PDCCH may be sent via different TRPs to schedule the PDSCH transmissions.
- multiple DCI based URLLC schemes can be supported using the same transmission block (TB) and indicating the same HARQ process ID towards the UE.
- MCS modulation and coding scheme
- TRPs can use the same MCS table as the scheduled MCSs by independent DCIs from each TRP may be much closer to each other.
- RSRP reference signal received power
- the required block error rate (BLER) operating point could be much lower, e.g., 10-5. Those cases may require using significantly different MCS compared to the TRP that supports low priority traffic.
- the MCS table to be used for the TRP (or the service type) is configured by the PDSCH configuration, where a change of the service may trigger to have RRC reconfiguration or use of different radio network temporary identifier (RNTI) at the TRP and the UE side (not all UEs may support such a feature).
- RNTI radio network temporary identifier
- TRP1 a first TRP
- TRP2 another TRP
- the UE when the multi-DCI based multi-TRP operation or framework is applied to a UE, the UE can be additionally configured to use multiple MCS tables, where the same or different MCS tables may be used among multiple TRPs.
- MCS tables Currently, NR has three MCS tables, 64QAM (default table), 256QAM, and QAM64LowSE (for URLLC), and each TRP may be configured with at least with one of these. It is noted, however, that example embodiments are not necessarily limited to these MCS tables, as certain embodiments can be extended and applied to any type of MCS table.
- configuring multiple MCS tables may be performed using RRC signalling, where the configuration can be carried within the PDSCH configuration of the BWP configuration, and one or more MCS table(s) are indicated.
- the UE may derive the MCS table to be used for receiving data from a TRP based on the CORESET(s) used by the TRP.
- the UE may derive transport block size, low density parity check (LDPC) base graph, limited buffer rate matching (LBRM) parameters, and other related settings based on the CORESET associated with the detected PDCCH.
- LDPC low density parity check
- LBRM limited buffer rate matching
- Fig. 2 illustrates an example system depicting the use of CORESET groups to relate the MCS tables, according to an embodiment. More specifically, Fig. 2 illustrates one example of using different CORESETs for two PDCCH transmissions. As illustrated in the example of Fig. 2, the UE may assume that eMBB transmission is scheduled in CORESET #1 or #2 with MCS table that supports 256 QAM MCS table and that eMBB transmission (or URLLC) is scheduled by CORESET #3 or #4 with MCS table that supports maximum 64 QAM entries.
- a RRC update may be provided to reflect the changes for indicating different MCS tables for multi-DCI based multi-TRP scheme.
- Fig. 3a illustrates an example of a PDSCH configuration (PDSCH-Config) information element (IE) that may be used to configure the UE specific PDSCH parameters, according to one embodiment.
- the PDSCH configuration IE comprises a mcs-Table2 entry, in addition to the mcs-Table entry.
- RRC IE for CoresetPoolIndex (where values can be 0 or 1) per CORESET is supported in Release- 16.
- 3b illustrates an example table depicting the PDSCH-Config field descriptions, according to an example embodiment.
- the UE may be configured with mcs-Table and mcs- Table2.
- a UE may use IMCS (MCS index) and MCS Table that supports maximum 256 QAM entries to determine the modulation order (Q m ) and target code rate (R) used in the physical downlink shared channel (PDSCH).
- IMCS MCS index
- MCS Table MCS Table that supports maximum 256 QAM entries to determine the modulation order (Q m ) and target code rate (R) used in the physical downlink shared channel (PDSCH).
- the UE when a UE is not configured with MCS-C-RNTI, the higher layer parameter mcs-Table or mcs-Table2 given by PDSCH-Config is set to 'qam64LowSE' and the PDSCH is scheduled by a PDCCH in a UE- specific search space with CRC scrambled by C-RNTI, the UE may use IMCS (MCS index) and MCS Table that supports maximum 64 QAM entries and lower spectral efficient entries (64LowSE QAM) to determine the modulation order (Q m ) and target code rate (R) used in the physical downlink shared channel (PDSCH).
- IMCS MCS index
- MCS Table that supports maximum 64 QAM entries and lower spectral efficient entries (64LowSE QAM) to determine the modulation order (Q m ) and target code rate (R) used in the physical downlink shared channel (PDSCH).
- a UE may use IMCS (MCS index) and MCS Table that supports maximum 64 QAM entries to determine the modulation order (Q m ) and target code rate (R) used in the physical downlink shared channel (PDSCH).
- MCS index MCS index
- R target code rate
- a UE is not expected to decode a PDSCH scheduled with P-RNTI, RA-RNTI, SI- RNTI and Qm > 2.
- Fig. 4a illustrates an example flow diagram of a method of MCS table to CORESETs association for multi-TRP operation, according to one example embodiment.
- the flow diagram of Fig. 4a may be performed by a network entity or network node associated with a communication system, such as LTE or 5G NR.
- the network node performing the method of Fig. 4a may comprise a base station, eNB, gNB, NG-RAN node, and/or TRP.
- the method of Fig. 4a may be performed by a TRP, such as that illustrated in Figs. 1 or 2.
- the method may comprise, at 300, transmitting, to one or more UE(s), a signal (e.g., RRC signal or message) indicating or configuring the UE(s) for the use of at least two different MCS tables including a first MCS table (e.g., MCS table 1) and a second MCS table (e.g., MCS table 2).
- the transmitting 300 may comprise configuring the at least two MCS tables using RRC signalling, where the configuration can be carried within the PDSCH configuration of the BWP configuration.
- the MCS tables may comprise 64QAM, 256QAM, and/or QAM64LowSE.
- the transmitting 300 may further comprise indicating, for example in a PDCCH configuration (e.g., PDCCH-config parameter), at least two resource sets.
- the at least two resource sets may have or be associated to a resource set parameter.
- one of the at least two resource sets may have a first value for the resource set parameter and another of the at least two resource sets may have a second value for the resource set parameter, and the second value may be different from the first value.
- the resource sets may comprise CORESETs and/or the resource set parameter may comprise a CORESET pool index.
- each of the resource sets e.g., CORESETs
- the method may also comprise coordinating between TRPs when deciding the resource sets (e.g., CORESETs) per TRP.
- a TRP would not use resource sets that are assigned to another TRP.
- the method may comprise scheduling transmission with the correct (matching to the resource sets assigned) MCS table.
- the method of Fig. 4a may also comprise, at 310, transmitting, to the UE(s), a second signal associated with the first value for the resource set parameter and/or a third signal associated with the second value for the resource set parameter.
- the transmitting 310 may comprise transmitting a signal on at least one PDSCH associated with the CORESET pool index of 0 and/or transmitting a signal on at least one PDSCH associated with the CORESET pool index of 1.
- Fig. 4b illustrates an example flow diagram of a method of MCS table to CORESETs association for multi-TRP operation, according to one example embodiment.
- the flow diagram of Fig. 4b may be performed by a network entity or network node associated with a communication system, such as LTE or 5G NR.
- the network entity performing the method of Fig. 4b may be a UE, mobile station, IoT device, or the like. In one example embodiment, the method of Fig. 4b may be performed by the UE illustrated in Figs. 1 or 2, for instance.
- the method may comprise, at 350, receiving, from a network node, a signal (e.g., RRC signal or message) indicating or configuring the use of at least two different MCS tables including a first MCS table (e.g., MCS table 1) and a second MCS table (e.g., MCS table 2).
- a signal e.g., RRC signal or message
- the receiving 350 may comprise receiving the configuration of the at least two MCS tables using RRC signalling, where the configuration can be carried within the PDSCH (or PUSCH) configuration of the BWP configuration.
- the MCS tables may comprise 64QAM, 256QAM, and/or QAM64FowSE.
- the receiving 350 may further comprise receiving an indication, for example in a PDCCH configuration (e.g., PDCCH-config parameter), of at least two resource sets.
- the at least two resource sets may have or be associated to a resource set parameter.
- one of the at least two resource sets may have a first value for the resource set parameter and another of the at least two resource sets may have a second value for the resource set parameter, and the second value may be different from the first value.
- the resource sets may comprise CORESETs and/or the resource set parameter may comprise a CORESET pool index.
- each of the resource sets (e.g., CORESETs) may correspond to one or more TRP(s).
- the method of Fig. 4b may further comprise, at 360, receiving a second signal associated with the first value for the resource set parameter and/or receiving a third signal associated with the second value for the resource set parameter.
- the receiving 360 may comprise receiving the second signal and/or third signal on at least one PDSCH.
- the receiving 360 may comprise receiving the second signal on at least one PDSCH (or PUSCH) associated with the CORESET pool index of 0 and/or receiving the third signal on at least one PDSCH (or PUSCH) associated with the CORESET pool index of 1.
- the method when receiving the second signal associated with the first value for the resource set parameter, may comprise, at 370, using the first MCS table to decode the second signal or the at least one PDSCH. Additionally or alternatively, in an embodiment, when receiving the third signal associated with the second value for the resource set parameter, the method may comprise, at 370, using the second MCS table to decode the third signal or the at least one PDSCH.
- the using 370 may comprise using the first MCS table to decode the PDSCH (or PUSCH) when the at least one PDSCH (or PUSCH) is associated with the CORESET pool index of 0, and/or using the second MCS table to decode the PDSCH (or PUSCH) when the at least one PDSCH (or PUSCH) is associated with the CORESET pool index of 1.
- the UE may derive the MCS table to be used for receiving data from a TRP based on the CORESET(s) used by the TRP.
- the using 370 may further comprise deriving transport block size, low density parity check (LDPC) base graph, limited buffer rate matching (LBRM) parameters, and other related settings based on the CORESET associated with the detected PDCCH (or PUSCH).
- LDPC low density parity check
- LBRM limited buffer rate matching
- the using 370 may comprise using an MCS index and MCS Table that supports 256 QAM to determine the modulation order (Q m ) and target code rate (R) used in the PDSCH.
- the using 370 may comprise using a MCS index and MCS Table that supports 64 QAM to determine the modulation order (Q m ) and target code rate (R) used in the PDSCH.
- the using 370 may comprise using an MCS index and MCS Table that supports 64 QAM to determine the modulation order (Q m ) and target code rate (R) used in the PDSCH.
- apparatus 10 may be a node, host, or server in a communications network or serving such a network.
- apparatus 10 may be a satellite, base station, a Node B, an evolved Node B (eNB), 5G Node B or access point, next generation Node B (NG-NB or gNB), TRP, and/or WLAN access point, associated with a radio access network, such as a LTE network, 5G or NR.
- apparatus 10 may be an eNB in LTE or gNB in 5G.
- apparatus 10 may be comprised of an edge cloud server as a distributed computing system where the server and the radio node may be stand-alone apparatuses communicating with each other via a radio path or via a wired connection, or they may be located in a same entity communicating via a wired connection.
- apparatus 10 represents a gNB
- it may be configured in a central unit (CU) and distributed unit (DU) architecture that divides the gNB functionality.
- the CU may be a logical node that comprises gNB functions such as transfer of user data, mobility control, radio access network sharing, positioning, and/or session management, etc.
- the CU may control the operation of DU(s) over a front-haul interface.
- the DU may be a logical node that comprises a subset of the gNB functions, depending on the functional split option. It should be noted that one of ordinary skill in the art would understand that apparatus 10 may comprise components or features not shown in Fig. 5a.
- apparatus 10 may comprise a processor 12 for processing information and executing instructions or operations.
- processor 12 may be any type of general or specific purpose processor.
- processor 12 may comprise one or more of general- purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs), field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), and processors based on a multi-core processor architecture, as examples. While a single processor 12 is shown in Fig. 5a, multiple processors may be utilized according to other embodiments.
- apparatus 10 may comprise two or more processors that may form a multiprocessor system (e.g., in this case processor 12 may represent a multiprocessor) that may support multiprocessing.
- the multiprocessor system may be tightly coupled or loosely coupled (e.g., to form a computer cluster).
- Processor 12 may perform functions associated with the operation of apparatus 10, which may comprise, for example, precoding of antenna gain/phase parameters, encoding and decoding of individual bits forming a communication message, formatting of information, and overall control of the apparatus 10, including processes related to management of communication resources.
- Apparatus 10 may further comprise or be coupled to a memory 14 (internal or external), which may be coupled to processor 12, for storing information and instructions that may be executed by processor 12.
- Memory 14 may be one or more memories and of any type suitable to the local application environment, and may be implemented using any suitable volatile or nonvolatile data storage technology such as a semiconductor-based memory device, a magnetic memory device and system, an optical memory device and system, fixed memory, and/or removable memory.
- memory 14 can be comprised of any combination of random access memory (RAM), read only memory (ROM), static storage such as a magnetic or optical disk, hard disk drive (HDD), or any other type of non-transitory machine or computer readable media.
- the instructions stored in memory 14 may comprise program instructions or computer program code that, when executed by processor 12, enable the apparatus 10 to perform tasks as described herein.
- apparatus 10 may further comprise or be coupled to (internal or external) a drive or port that is configured to accept and read an external computer readable storage medium, such as an optical disc, USB drive, flash drive, or any other storage medium.
- an external computer readable storage medium such as an optical disc, USB drive, flash drive, or any other storage medium.
- the external computer readable storage medium may store a computer program or software for execution by processor 12 and/or apparatus 10.
- apparatus 10 may also comprise or be coupled to one or more antennas 15 for transmitting and receiving signals and/or data to and from apparatus 10.
- Apparatus 10 may further comprise or be coupled to a transceiver 18 configured to transmit and receive information.
- the transceiver 18 may comprise, for example, a plurality of radio interfaces that may be coupled to the antenna(s) 15.
- the radio interfaces may correspond to a plurality of radio access technologies including one or more of GSM, NB-IoT, LTE, 5G, WLAN, Bluetooth, BT-LE, NFC, radio frequency identifier (RFID), ultrawideband (UWB), MulteFire, and the like.
- the radio interface may comprise components, such as filters, converters (for example, digital-to-analog converters and the like), mappers, a Fast Fourier Transform (FFT) module, and the like, to generate symbols for a transmission via one or more downlinks and to receive symbols, for example, via an uplink.
- components such as filters, converters (for example, digital-to-analog converters and the like), mappers, a Fast Fourier Transform (FFT) module, and the like, to generate symbols for a transmission via one or more downlinks and to receive symbols, for example, via an uplink.
- FFT Fast Fourier Transform
- transceiver 18 may be configured to modulate information on to a carrier waveform for transmission by the antenna(s) 15 and demodulate information received via the antenna(s) 15 for further processing by other elements of apparatus 10.
- transceiver 18 may be capable of transmitting and receiving signals or data directly.
- apparatus 10 may comprise an input and/or output device (I/O device).
- memory 14 may store software modules that provide functionality when executed by processor 12.
- the modules may comprise, for example, an operating system that provides operating system functionality for apparatus 10.
- the memory may also store one or more functional modules, such as an application or program, to provide additional functionality for apparatus 10.
- the components of apparatus 10 may be implemented in hardware, or as any suitable combination of hardware and software.
- processor 12 and memory 14 may be comprised in or may form a part of processing circuitry or control circuitry.
- transceiver 18 may be comprised in or may form a part of transceiver circuitry.
- circuitry may refer to hardware-only circuitry implementations (e.g., analog and/or digital circuitry), combinations of hardware circuits and software, combinations of analog and/or digital hardware circuits with software/firmware, any portions of hardware processor(s) with software (including digital signal processors) that work together to case an apparatus (e.g., apparatus 10) to perform various functions, and/or hardware circuit(s) and/or processor(s), or portions thereof, that use software for operation but where the software may not be present when it is not needed for operation.
- hardware-only circuitry implementations e.g., analog and/or digital circuitry
- combinations of hardware circuits and software e.g., combinations of analog and/or digital hardware circuits with software/firmware
- any portions of hardware processor(s) with software including digital signal processors
- circuitry may also cover an implementation of merely a hardware circuit or processor (or multiple processors), or portion of a hardware circuit or processor, and its accompanying software and/or firmware.
- the term circuitry may also cover, for example, a baseband integrated circuit in a server, cellular network node or device, or other computing or network device.
- apparatus 10 may be a network node or RAN node, such as a base station, access point, Node B, eNB, gNB, TRP, WLAN access point, or the like.
- apparatus 10 may be controlled by memory 14 and processor 12 to perform the functions associated with any of the example embodiments described herein, such as the flow or signaling diagrams illustrated in Fig. 4a or Fig. 4b.
- apparatus 10 may be configured to perform a process MCS table to CORESETs association for multi -TRP operation.
- apparatus 10 may represent a network node, such as a gNB or TRP, for example.
- apparatus 10 may be controlled by memory 14 and processor 12 to transmit, to one or more UE(s), a signal (e.g., RRC signal or message) indicating or configuring the UE(s) for the use of at least two different MCS tables including a first MCS table (e.g., MCS table 1) and a second MCS table (e.g., MCS table 2).
- apparatus 10 may be controlled by memory 14 and processor 12 to configure the use of the at least two MCS tables using RRC signalling, where the configuration can be carried within the PDSCH configuration of the BWP configuration.
- the MCS tables may comprise 64QAM, 256QAM, and/or QAM64LowSE.
- apparatus 10 may be controlled by memory 14 and processor 12 to indicate, for example in a PDCCH configuration (e.g., PDCCH-config parameter), at least two resource sets.
- the at least two resource sets may have or be associated to a resource set parameter.
- one of the at least two resource sets may have a first value for the resource set parameter and another of the at least two resource sets may have a second value for the resource set parameter, and the second value may be different from the first value.
- the resource sets may comprise CORESETs and/or the resource set parameter may comprise a CORESET pool index.
- each of the resource sets may correspond to one or more TRP(s).
- apparatus 10 may be controlled by memory 14 and processor 12 to coordinate between TRPs when deciding the resource sets (e.g., CORESETs) per TRP.
- a TRP would not use resource sets that are assigned to another TRP.
- the method may comprise scheduling transmission with the correct (matching to the resource set assigned) MCS table.
- apparatus 10 may be controlled by memory 14 and processor 12 to transmit, to the UE(s), a second signal associated with the first value for the resource set parameter and/or a third signal associated with the second value for the resource set parameter.
- apparatus 10 when transmitting the second signal associated with the first value for the resource set parameter, apparatus 10 may be controlled by memory 14 and processor 12 to transmit a signal on at least one PDSCH associated with the CORESET pool index of 0.
- apparatus 10 when transmitting the third signal associated with the second value for the resource set parameter, apparatus 10 may be controlled by memory 14 and processor 12 to transmit a signal on at least one PDSCH associated with the CORESET pool index of 1.
- the transmission of the second signal associated with the first value of the resource set parameter is configured to cause the UE(s) to use the first MCS table to decode the second signal or the at least one PDSCH
- the transmission of the third signal associated with the second value of the resource set parameter is configured to cause the UE(s) to use the second MCS table to decode the third signal or the at least one PDSCH.
- Fig. 5b illustrates an example of an apparatus 20 according to another embodiment.
- apparatus 20 may be a node or element in a communications network or associated with such a network, such as a UE, mobile equipment (ME), mobile station, mobile device, stationary device, IoT device, or other device.
- UE may alternatively be referred to as, for example, a mobile station, mobile equipment, mobile unit, mobile device, user device, subscriber station, wireless terminal, tablet, smart phone, IoT device, sensor or NB-IoT device, or the like.
- apparatus 20 may be implemented in, for instance, a wireless handheld device, a wireless plug-in accessory, or the like.
- apparatus 20 may comprise one or more processors, one or more computer-readable storage medium (for example, memory, storage, or the like), one or more radio access components (for example, a modem, a transceiver, or the like), and/or a user interface.
- apparatus 20 may be configured to operate using one or more radio access technologies, such as GSM, LTE, LTE-A, NR, 5G, WLAN, WiFi, NB-IoT, Bluetooth, NFC, MulteFire, and/or any other radio access technologies. It should be noted that one of ordinary skill in the art would understand that apparatus 20 may comprise components or features not shown in Fig. 5b.
- apparatus 20 may comprise or be coupled to a processor 22 for processing information and executing instructions or operations.
- processor 22 may be any type of general or specific purpose processor.
- processor 22 may comprise one or more of general-purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs), field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), and processors based on a multi-core processor architecture, as examples. While a single processor 22 is shown in Fig. 5b, multiple processors may be utilized according to other embodiments.
- apparatus 20 may comprise two or more processors that may form a multiprocessor system (e.g., in this case processor 22 may represent a multiprocessor) that may support multiprocessing.
- processor 22 may represent a multiprocessor
- the multiprocessor system may be tightly coupled or loosely coupled (e.g., to form a computer cluster).
- Processor 22 may perform functions associated with the operation of apparatus 20 including, as some examples, precoding of antenna gain/phase parameters, encoding and decoding of individual bits forming a communication message, formatting of information, and overall control of the apparatus 20, including processes related to management of communication resources.
- Apparatus 20 may further comprise or be coupled to a memory 24 (internal or external), which may be coupled to processor 22, for storing information and instructions that may be executed by processor 22.
- Memory 24 may be one or more memories and of any type suitable to the local application environment, and may be implemented using any suitable volatile or nonvolatile data storage technology such as a semiconductor-based memory device, a magnetic memory device and system, an optical memory device and system, fixed memory, and/or removable memory.
- memory 24 can be comprised of any combination of random access memory (RAM), read only memory (ROM), static storage such as a magnetic or optical disk, hard disk drive (HDD), or any other type of non-transitory machine or computer readable media.
- the instructions stored in memory 24 may comprise program instructions or computer program code that, when executed by processor 22, enable the apparatus 20 to perform tasks as described herein.
- apparatus 20 may further comprise or be coupled to (internal or external) a drive or port that is configured to accept and read an external computer readable storage medium, such as an optical disc, USB drive, flash drive, or any other storage medium.
- an external computer readable storage medium such as an optical disc, USB drive, flash drive, or any other storage medium.
- the external computer readable storage medium may store a computer program or software for execution by processor 22 and/or apparatus 20.
- apparatus 20 may also comprise or be coupled to one or more antennas 25 for receiving a downlink signal and for transmitting via an uplink from apparatus 20.
- Apparatus 20 may further comprise a transceiver 28 configured to transmit and receive information.
- the transceiver 28 may also comprise a radio interface (e.g., a modem) coupled to the antenna 25.
- the radio interface may correspond to a plurality of radio access technologies including one or more of GSM, LTE, LTE-A, 5G, NR, WLAN, NB-IoT, Bluetooth, BT-LE, NFC, RFID, UWB, and the like.
- the radio interface may comprise other components, such as filters, converters (for example, digital-to-analog converters and the like), symbol demappers, signal shaping components, an Inverse Fast Fourier Transform (IFFT) module, and the like, to process symbols, such as OFDMA symbols, carried by a downlink or an uplink.
- filters for example, digital-to-analog converters and the like
- symbol demappers for example, digital-to-analog converters and the like
- signal shaping components for example, an Inverse Fast Fourier Transform (IFFT) module, and the like
- IFFT Inverse Fast Fourier Transform
- transceiver 28 may be configured to modulate information on to a carrier waveform for transmission by the antenna(s) 25 and demodulate information received via the antenna(s) 25 for further processing by other elements of apparatus 20.
- transceiver 28 may be capable of transmitting and receiving signals or data directly.
- apparatus 20 may comprise an input and/or output device (I/O device).
- apparatus 20 may further comprise a user interface, such as a graphical user interface or touchscreen.
- memory 24 stores software modules that provide functionality when executed by processor 22.
- the modules may comprise, for example, an operating system that provides operating system functionality for apparatus 20.
- the memory may also store one or more functional modules, such as an application or program, to provide additional functionality for apparatus 20.
- the components of apparatus 20 may be implemented in hardware, or as any suitable combination of hardware and software.
- apparatus 20 may optionally be configured to communicate with apparatus 10 via a wireless or wired communications link 70 according to any radio access technology, such as NR.
- processor 22 and memory 24 may be comprised in or may form a part of processing circuitry or control circuitry.
- transceiver 28 may be comprised in or may form a part of transceiving circuitry.
- apparatus 20 may be a UE, mobile device, mobile station, ME, IoT device and/or NB-IoT device, for example.
- apparatus 20 may be controlled by memory 24 and processor 22 to perform the functions associated with example embodiments described herein.
- apparatus 20 may be configured to perform one or more of the processes depicted in any of the flow charts or signaling diagrams described herein, such as those illustrated in Figs. 4a or 4b.
- apparatus 20 may comprise or represent a UE.
- apparatus 20 may be controlled by memory 24 and processor 22 to receive, from a network node, a signal (e.g., RRC signal or message) indicating or configuring the use of at least two different MCS tables including a first MCS table (e.g., MCS table 1) and a second MCS table (e.g., MCS table 2).
- apparatus 20 may be controlled by memory 24 and processor 22 to receive the configuration of the at least two MCS tables using RRC signalling, where the configuration can be carried within the PDSCH (or PUSCH) configuration of the BWP configuration.
- the MCS tables may comprise 64QAM, 256QAM, and/or QAM64LowSE.
- apparatus 20 may be controlled by memory 24 and processor 22 to receive an indication, for example in a PDCCH configuration (e.g., PDCCH-config parameter), of at least two resource sets.
- the at least two resource sets may have or be associated to a resource set parameter.
- one of the at least two resource sets may have a first value for the resource set parameter and another of the at least two resource sets may have a second value for the resource set parameter, and the second value may be different from the first value.
- the resource sets may comprise CORESETs and/or the resource set parameter may comprise a CORESET pool index.
- each of the resource sets (e.g., CORESETs) may correspond to one or more TRP(s).
- apparatus 20 may be controlled by memory 24 and processor 22 to receive a second signal associated with the first value for the resource set parameter and/or receiving a third signal associated with the second value for the resource set parameter.
- the second signal and/or third signal may be received on at least one PDSCH.
- apparatus 20 may be controlled by memory 24 and processor 22 to receive the second signal on at least one PDSCH (or PUSCH) associated with the CORESET pool index of 0 and/or to receive the third signal on at least one PDSCH (or PUSCH) associated with the CORESET pool index of 1.
- apparatus 20 may be controlled by memory 24 and processor 22 to use the first MCS table to decode the second signal or the PDSCH (or PUSCH) when the second signal is associated with the first value for the resource set parameter, and to use the second MCS table to decode the third signal or the PDSCH (or PUSCH) when the third signal is associated with the second value for the resource set parameter.
- apparatus 20 may be controlled by memory 24 and processor 22 to use the first MCS table to decode the PDSCH (or PUSCH) when the at least one PDSCH (or PUSCH) is associated with the CORESET pool index of 0, and/or to use the second MCS table to decode the PDSCH (or PUSCH) when the at least one PDSCH (or PUSCH) is associated with the CORESET pool index of 1.
- apparatus 20 may be configured to derive the MCS table to be used for receiving data from a TRP based on the CORESET(s) used by the TRP.
- apparatus 20 may be controlled by memory 24 and processor 22 to derive transport block size, low density parity check (LDPC) base graph, limited buffer rate matching (LBRM) parameters, and other related settings based on the CORESET associated with the detected PDCCH (or PUSCH).
- LDPC low density parity check
- LBRM limited buffer rate matching
- apparatus 20 may be controlled by memory 24 and processor 22 to use an MCS index and MCS Table that supports 256 QAM to determine the modulation order (Q m ) and target code rate (R) used in the PDSCH.
- PDSCH configuration e.g., PDSCH-config parameter
- apparatus 20 may be controlled by memory 24 and processor 22 to use an MCS index and MCS Table that supports 256 QAM to determine the modulation order (Q m ) and target code rate (R) used in the PDSCH.
- apparatus 20 when apparatus 20 is not configured with MCS-C-RNTI, and the first MCS table or the second MCS table given by PDSCH configuration (e.g., PDSCH-config parameter) is set to 64LowSE QAM and the PDSCH is scheduled by a PDCCH in a UE-specific search space with CRC scrambled by C-RNTI, apparatus 20 may be controlled by memory 24 and processor 22 to use a MCS index and MCS Table that supports 64 QAM to determine the modulation order (Q m ) and target code rate (R) used in the PDSCH.
- PDSCH configuration e.g., PDSCH-config parameter
- apparatus 20 may be controlled by memory 24 and processor 22 to use an MCS index and MCS Table that supports 64 QAM to determine the modulation order (Q m ) and target code rate (R) used in the PDSCH.
- Q m modulation order
- R target code rate
- one embodiment allows for the use of multiple MCS tables to support multi-TRP operation by applying an MCS table to CORESET association. Accordingly, the use of certain example embodiments results in improved functioning of communications networks and their nodes, such as base stations, eNBs, gNBs, TRPs, and/or UEs or mobile stations.
- any of the methods, processes, signaling diagrams, algorithms or flow charts described herein may be implemented by software and/or computer program code or portions of code stored in memory or other computer readable or tangible media, and executed by a processor.
- an apparatus may be comprised or be associated with at least one software application, module, unit or entity configured as arithmetic operation(s), or as a program or portions of it (including an added or updated software routine), executed by at least one operation processor.
- Programs also called program products or computer programs, including software routines, applets and macros, may be stored in any apparatus-readable data storage medium and may comprise program instructions to perform particular tasks.
- a computer program product may comprise one or more computer-executable components which, when the program is run, are configured to carry out some example embodiments.
- the one or more computer-executable components may be at least one software code or portions of code. Modifications and configurations for implementing the functionality of an example embodiment may be performed as routine(s), which may be implemented as added or updated software routine(s). In one example, software routine(s) may be downloaded into the apparatus.
- software or computer program code or portions of code may be in source code form, object code form, or in some intermediate form, and it may be stored in some sort of carrier, distribution medium, or computer readable medium, which may be any entity or device capable of carrying the program.
- carrier may comprise a record medium, computer memory, read-only memory, photoelectrical and/or electrical carrier signal, telecommunications signal, and/or software distribution package, for example.
- the computer program may be executed in a single electronic digital computer or it may be distributed amongst a number of computers.
- the computer readable medium or computer readable storage medium may be a non-transitory medium.
- the functionality may be performed by hardware or circuitry comprised in an apparatus, for example through the use of an application specific integrated circuit (ASIC), a programmable gate array (PGA), a field programmable gate array
- ASIC application specific integrated circuit
- PGA programmable gate array
- FPGA field programmable gate array
- the functionality may be implemented as a signal, such as a non-tangible means, that can be carried by an electromagnetic signal downloaded from the Internet or other network.
- an apparatus such as a node, device, or a corresponding component, may be configured as circuitry, a computer or a microprocessor, such as single-chip computer element, or as a chipset, which may comprise at least a memory for providing storage capacity used for arithmetic operation(s) and/or an operation processor for executing the arithmetic operation(s).
- a first embodiment is directed to a method, which may comprise receiving, at a user equipment, a signal configuring a use of at least two different modulation and coding scheme (MCS) tables comprising a first MCS table and a second MCS table, and receiving an indication of at least two resource sets (e.g., CORESETs).
- MCS modulation and coding scheme
- One of the at least two resource sets has a first value for the resource set parameter and another of the at least two resource sets has a second value for the resource set parameter.
- the second value may be different from the first value, and each of the at least two resource sets may correspond to at least one transmit receive point (TRP).
- TRP transmit receive point
- the method may comprise using the first MCS table to decode the at least one second signal.
- the method may comprise using the second MCS table to decode the at least one third signal.
- the receiving of the signal configuring the use of at least two different MCS tables comprises receiving the configuration of the at least two MCS tables using RRC signalling, where the configuration can be carried within the PDSCH configuration.
- the receiving of the indication comprises receiving the at least two resource sets in a PDCCH configuration parameter.
- the receiving of the second signal and/or the third signal comprises receiving the second signal and/or third signal on at least one PDSCH.
- the resource sets may comprise CORESETs.
- the resource set parameter may comprise a CORESET pool index.
- the first value for the resource set parameter may be a CORESET pool index of 0 and the second value for the resource set parameter may be a CORESET pool index of 1.
- the at least two MCS tables comprise at least one of 64QAM, 256QAM, or QAM64LowSE.
- the method may further comprise deriving transport block size, low density parity check (LDPC) base graph, limited buffer rate matching (LBRM) parameters, and other related settings based on the CORESET associated with the detected physical downlink control channel (PDCCH).
- LDPC low density parity check
- LBRM limited buffer rate matching
- the using comprises using an MCS index and MCS Table that supports 256 QAM to determine the modulation order (Q m ) and target code rate (R) used in the PDSCH.
- the using comprises using a MCS index and MCS Table that supports 64 QAM to determine the modulation order (Q m ) and target code rate (R) used in the PDSCH.
- the using comprises using an MCS index and MCS Table that supports 64 QAM to determine the modulation order (Q m ) and target code rate (R) used in the PDSCH.
- a second embodiment is directed to a method, which may comprise transmitting, from a network node, a signal configuring at least one user equipment for use of at least two different modulation and coding scheme (MCS) tables comprising a first MCS table and a second MCS table.
- MCS modulation and coding scheme
- the signal may comprise an indication of at least two resource sets, where each resource set is associated to a resource set parameter.
- One of the at least two resource sets has a first value for the resource set parameter and another of the at least two resource sets has a second value for the resource set parameter, the second value being different from the first value.
- Each of the at least two resource sets may correspond to at least one TRP.
- the method may also comprise transmitting, to the at least one user equipment, at least one of a second signal associated with the first value for the resource set parameter or a third signal associated with the second value for the resource set parameter.
- the transmitting of the at least one second signal associated with the first value for the resource set parameter is configured to cause the at least one user equipment to use the first modulation and coding scheme table to decode the at least one second signal
- the transmitting of the at least one third signal associated with the second value for the resource set parameter is configured to cause the at least one user equipment to use the second modulating and coding scheme table to decode the at least one third signal.
- the transmitting of the signal configuring the use of at least two different MCS tables comprises transmitting the configuration of the at least two MCS tables using RRC signalling, where the configuration can be carried within the PDSCH configuration.
- the at least two MCS tables comprise at least one of 64QAM, 256QAM, or QAM64LowSE.
- a third embodiment is directed to an apparatus including at least one processor and at least one memory comprising computer program code.
- the at least one memory and computer program code may be configured, with the at least one processor, to cause the apparatus at least to perform the method according to the first embodiment, the second embodiment, and/or any other embodiments discussed herein, or any of the variants described above.
- a fourth embodiment is directed to an apparatus that may comprise circuitry configured to perform the method according to the first embodiment, the second embodiment, and/or any other embodiments discussed herein, or any of the variants described above.
- a fifth embodiment is directed to an apparatus that may comprise means for performing the method according to the first embodiment, the second embodiment, and/or any other embodiments discussed herein, or any of the variants described above.
- a sixth embodiment is directed to a non-transitory computer readable medium comprising program instructions stored thereon for performing at least the method according to the first embodiment, the second embodiment, and/or any other embodiments discussed herein, or any of the variants described above.
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PCT/EP2020/087553 WO2021160331A1 (en) | 2020-02-11 | 2020-12-22 | Modulation and coding scheme table to resource set associations for multi-transmit receive point operation |
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