RU2780827C1 - User equipment, network node, and communication method - Google Patents

Abstract

FIELD: wireless communication.

SUBSTANCE: transceiver of user equipment (hereinafter – UE) receives via a physical downlink control channel (PDCCH) downlink control information (hereinafter – DCI) for planning a set of transmissions or receptions between UE and a set of transmission and reception points (hereinafter – TRP) via a set of channels, wherein DCI contains one or more indicators indicating one or more corresponding transmission parameters, and UE circuit receives, based on one or more indicators and configuration, a set of values of respectively one or more transmission parameters. The transceiver performs a set of transmissions or receptions using corresponding one of the set of values of one or more transmission parameters for each of the set of transmissions or receptions.

EFFECT: increase in the reliability and stability of communication in case of a set of TRP.

26 cl, 14 dwg, 11 tbl

Description

FIELD OF TECHNOLOGY

The present invention relates to the transmission and reception of signals in a communication system. In particular, the present invention relates to methods and apparatus for such transmission and reception.

BACKGROUND OF THE INVENTION

The 3rd Generation Partnership Project (3GPP) consortium is working on technical specifications for next generation cellular technology, also referred to as fifth generation (5G), including Radio Access Technology (RAT) New Radio , NR) operating in frequency ranges up to 100 GHz. NR is the technology successor represented by Long Term Evolution (LTE) and LTE Advanced (LTE Advanced, LTE-A).

For systems such as LTE and NR, further modifications and additional functions may contribute to the efficient operation of the communication system, as well as specific devices related to the system.

DISCLOSURE OF THE INVENTION

One non-limiting and exemplary embodiment facilitates signaling a Physical Downlink Control Channel (PDCCH) for communication in the case of multiple Transmission and Reception Points (TRP).

In accordance with one general aspect, the methods disclosed herein include a User Equipment (UE) comprising a transceiver that, during operation, receives Downlink Control Information (Downlink Control Information) over a Physical Downlink Control Channel (PDCCH). , DCI) for scheduling a plurality of transmissions or receptions between a UE and a plurality of receiving and transmitting points (TRPs) over a plurality of channels, wherein the DCI comprises one or more indicators indicating one or more corresponding transmission parameters, and a scheme that, during operation, receives based on one or more indicators and a configuration, a plurality of values, respectively, of one or more transmission parameters, while the transceiver during operation performs a plurality of transmissions or receptions using a corresponding one of the plurality of values of one or more transmission parameters for each of the plurality of transmissions or receptions.

It should be noted that general or specific embodiments may be implemented as a system, method, integrated circuit, computer program, storage medium, or any selective combination thereof.

Additional benefits and advantages of the disclosed embodiments will become apparent from the description of the invention and the drawings. Benefits and/or advantages may be achieved individually through various embodiments and features in the description and drawings, and it is not necessary to have all of them in order to obtain one or more of such benefits and/or advantages.

BRIEF DESCRIPTION OF THE DRAWINGS

The following is a more detailed description of examples of implementation with reference to the accompanying figures and drawings.

On FIG. 1 shows an example architecture for a 3GPP NR system including an example user plane and control architecture for LTE eNBs, gNBs, and UEs.

On FIG. 2 shows an example illustration of the transmission of two Physical Downlink Shared Channels (PDSCH) for one UE.

On FIG. 3 shows an example illustrating the transmission of one PDCCH from one TRP scheduling two PDSCH transmissions from two TRPs.

On FIG. 4 is a graph showing front-loaded demodulation reference symbol configurations for data channels.

On FIG. 5 is a block diagram showing the structure of a UE and a network node.

On FIG. 6 is a flowchart showing a UE method and a network node method.

On FIG. 7 is a block diagram showing an example of the structure of a UE parameter acquisition circuit.

On FIG. 8 is a block diagram showing an example of the structure of a UE parameter acquisition circuit.

On FIG. 9 shows an example Radio Resource Control (RRC) code containing combination table values for a plurality of TRPs.

On FIG. 10 is an example of a Radio Resource Control (RRC) code containing combination table values for a plurality of TRPs to indicate a Demodulation Reference Signal (DMRS).

On FIG. 11 is an example of a Radio Resource Control (RRC) code containing combination table values for a plurality of TRPs to indicate the state of a Transmission Configuration Indication (TCI).

On FIG. 12 shows an example of a Radio Resource Control (RRC) code containing an enable parameter for a combination table for a plurality of TRPs.

On FIG. 13 shows an example of a radio resource control (RRC) code containing an enable parameter for a combination table for a plurality of TRPs for DMRS indication.

On FIG. 14 shows an example of a Radio Resource Control (RRC) code containing an enable parameter for a combination table for a plurality of TRPs to indicate a TCI state.

IMPLEMENTATION OF THE INVENTION

On FIG. 1 shows an illustrative example of a communication system including a base station, a terminal, and a core network. Such a communication system may be a 3GPP system such as NR and/or LTE and/or a Universal Mobile Telecommunications System (UMTS). For example, as shown in FIG. 1, a Base Station (BS) may be a gNB (gNodeB, eg NR gNB) or an eNB (eNodeB, eg LTE gNB). However, the present invention is not limited to these 3GPP systems or any other systems. While the embodiments and exemplary embodiments are described using some 3GPP system terminology, the present invention is also applicable to any other communication systems, and in particular to cellular, wireless, and/or mobile systems.

It is planned that NR will facilitate the provision of a single technical framework that satisfies several specific use cases, requirements and deployment scenarios, including, for example, improved mobile broadband network (enhanced Mobile Broadband, eMBV), ultra-reliable communication with low latency (Ultra-Reliable Low -Latency Communications, URLLC), streaming machine type communication (massive Machine Type Communication, mMTC), etc. For example, eMBD deployment scenarios may include indoor access, dense urban, rural, macro-urban and high-speed areas; URLLC deployment scenarios may include industrial control systems; mobile medical care (remote control, diagnosis and treatment), real-time vehicle control, global control and management systems for intelligent networks; mMTC can include scenarios with a large number of devices with non-time-critical data transfer, such as smart wearable devices and sensor networks. The eMBV and URLLC services are similar in that they both require very high bandwidth, but differ in that the URLLC service requires ultra-low delays. In NR, the physical layer is based on time-frequency resources (such as Orthogonal Frequency Division Multiplexing (OFDM), similar to LTE) and can support multiple antennas.

In LTE and NR, a terminal is called a user equipment (UE). This may be a mobile device such as a cordless phone, smartphone, tablet, or USB flash drive with user equipment functionality. However, the term mobile device is not limited to this, and generally speaking, a repeater can also have the functionality of such a mobile device, and the mobile device can also act as a repeater.

A base station is a network node, for example, forming part of a network for providing services to terminals. The base station is a network node that provides wireless access to terminals.

The physical layer in NR may provide multi-antenna functionality, for example, multiple input/multiple output (Multiple Input, Multiple Output, MIMO), which may, for example, include the use of multiple or multiple transmission and reception points (multiple TRP). For example, user equipment may receive data from multiple transmit and receive points (TRPs), while multiple TRPs may be managed by the same or different network nodes. The terms "multipoint transmission" or "coordinated multipoint transmission" (Coordinated Multi-Point, CoMP) can also be used for communication in the case of multiple TRPs, including the transmission of multiple TRPs.

3rd Generation Partnership Project (3GPP) New Radio (NR) Release 15 defined basic support for multiple transmit and receive points (TRPs). In NR Release 16, work with multiple TRPs can be further improved in line with the new NR MIMO work stream (compare RP-182067, "Revised WID (work item description): Enhancements on MIMO for NR"). ): MIMO Enhancements for NR"), Samsung, 3GPP TSG RAN (Technical Specification Group Radio Access Network) Meeting #81, Gold Coast, Australia, Sept 10-13, 2018).

The present invention relates to communication in the case of multiple TRPs and proposes techniques related to, for example, the transmission of one physical downlink control channel (PDCCH), where one PDCCH is used for scheduling data or control channels such as a physical downlink shared channel (PDSCH), Physical Uplink Shared Channel (PUSCH), or Physical Uplink Control Channel (PUCCH) for multiple TRPs. Some of the techniques discussed relate to a DMRS port indication table for mapping demodulation reference signal (DMRS) ports to multiple layers for transmission over a plurality of TRPs and for signaling a transmission configuration indication (TCI) status for a plurality of TRPs. Modifications to the signaling associated with both the DMRS port indication and the TCI state over a single PDCCH for data channel transmissions/receptions in the case of multiple TRPs are discussed.

As mentioned, the present invention is applicable to the area of multiple TRPs in MIMO. Multipoint transmission and reception involves transmission/reception from/to multiple points that are connected to each other via either an ideal or non-ideal backhaul network (backhaul), which will be described in more detail below, for transmission coordination and/or acceptance to some extent.

The technologies disclosed herein are not limited to a specific TRP location or a specific relationship between TRPs and gNB stations. Accordingly, for example, operations with multiple TRPs can be performed by a gNB having different antenna panels or radio heads corresponding to the TRPs and different RF units operating with the respective antennas.

In addition, in the case of a plurality of TRPs, several options are possible regarding the positional relationship between the TRPs, and the distance between the TRPs may vary. For example, the TRPs may be close so that the UE receives signals from these TRPs at a similar angle. However, the TRPs may also be quite far apart, such as at remote locations within a cell of the network. A UE served by two TRPs may receive signaling from the respective TRPs and signal them on uncorrelated channels. Accordingly, channel diversity gains can be optimally used.

For example, a set of TRPs can be broken down into two high-level categories. Namely, a distinction between the categories can be made with respect to the type of back transport network of the back transport link between two TRP data. On the one hand, an ideal back transport network is a very high throughput, very low latency back transport network, such as a dedicated point-to-point connection using, for example, optical fiber. It is assumed that an ideal back transport network allows communication between TRPs with a latency of approximately or nearly 0 ms (for example, for LTE-A, 3GPP TR 36.932 V15.0. direction is less than 2.5 µs, however fiber/cable propagation delay is not included). On the other hand, the non-ideal back transport network is a back transport network such as Digital Subscriber Line (DSL), microwave and other back transport network like relay, and may, for example, include end (one-way) delays in the band 2 ms or 5 communication delay between two TRP data.

In addition to the division into ideal back transport networks and non-ideal back transport networks in the MIMO technology with multiple TRPs, further categorization can be performed with respect to the sharing order of the baseband scheme between TRPs. For example, although there are different Radio Frequency (RF) blocks for each of the two TRP data, the TRPs may use the same baseband scheme. In this case, the back transport link/network between the RF units and the baseband circuit may or may not be ideal. In an alternative implementation, each TRP may have its own blocks, both baseband and radio frequency. Then the respective links between baseband circuits and RF blocks, as well as the link between different baseband circuits, may or may not be ideal.

The present invention proposes approaches that may facilitate the handling of multiple TRPs and may in particular contribute to the achievement of reliability and robustness. The disclosed techniques may, for example, facilitate satisfying a URLLC requirement by utilizing multiple TRP associations, but are not limited to URLLC use cases. For example, the disclosed technologies may also be applied to eMBV and mMTC use cases. The present invention is applicable to scenarios involving one or both of the ideal and non-ideal back transport networks.

As mentioned above, multiple and widely spaced TRPs can make space diversity gains possible. The use of these space diversity gains can particularly facilitate transmission and reception in the high frequency range, where, in particular, blocking of any of the links or wireless communication channels between the TRP and the UE is possible. In view of this, the methods disclosed herein can facilitate coordination between multiple points, such as TRPs, for scheduling control channels and/or data channels.

An example of communication with multiple TRPs is shown in FIG. 2, where a plurality of downlink physical data channels are transmitted from two TRPs (which, for example, are connected by an ideal back transport network) to one UE.

In the case of multiple TRPs, there may be different transmission modes depending on what the back transport network link between TRPs is and whether each TRP has its own control channel (PDCCH/PUCCH) and/or data channel (PDSCH/PUSCH).

In accordance with some agreements RAN1#94b and RAN#95 consider different alternatives related to the transmission of one and/or multiple PDCCHs for transmission in case of multiple TRPs, and it is agreed to choose in descending order of priority from the following options: Support for configuration with only one PDCCH (where a multiple PDCCH configuration can be provided optionally); support for multiple PDCCH configuration (where single PDCCH configuration can be optionally provided); and support for both multiple PDCCH and single PDCCH configuration. As another option, a URLLC-specific PDCCH configuration may be designed, possibly containing a specific PDCCH structure/format or transmission scheme. Aspects to consider in descending order of priority may include back transport network delay, downlink control overhead, specification impact (including RAN2 specifications), UE complexity (related to power management, timing correction, and blind detection), DCI/UCI configuration, scheduler flexibility, PUCCH/PUSCH transmission between UEs, Release 15 PDCCH block probability, and Channel State Information (CSI) feedback.

The present invention may be applicable to the transmission of one PDCCH in multiple TRPs. However, the PDCCH may schedule, for example, PDSCH/PUSCH/PUCCH for multiple TRPs. As shown in FIG. 3, one PDCCH (content of one DCI) is transmitted from TRP1 to the UE, and it schedules corresponding PDSCHs (containing corresponding codewords) transmitted from TRP1 and TRP2 to the UE. This means that the content of one DCI on one PDCCH is used to transmit downlink data from both TRPs. Accordingly, one PDCCH transmitted from one of the TRPs schedules different codewords (different PDCCHs). For example, the respective codewords transmitted or received by two or more TRPs may be different or identical (eg, to facilitate achieving space diversity gains). In addition, different levels of the same codeword may be transmitted from multiple TRPs.

In NR Release 15, different demodulation reference signal (DMRS) patterns were defined for PDSCH/PUSCH, which are referred to as downloadable on the DMRS front side because they occupy the first one or two symbols of the data channel, eg the first one or more symbols of a slot. In terms of frequency, type 1 and type 2 DMRS configurations have been defined. Each configuration can be in either a 1-character or 2-character configuration. Accordingly, 4 different DMRS patterns were defined as shown in FIG. 4. In addition, additional time domain patterns with additional DMRS symbols are also defined.

A Reference Signal (RS) pattern is transmitted from an antenna port (or DMRS port or port) at the base station. A port may be implemented either as a single physical transmit antenna (or TRP) or as a combination of multiple physical antenna elements. In any case, the signal transmitted from each antenna port is not intended to be further deconstructed by the UE receiver: the transmitted RS (specifically the demodulation reference signal) corresponding to that antenna port determines the antenna port from the UE's point of view and allows the UE to obtain a channel estimate for all of data transmitted to that antenna port, whether it represents a single radio channel from a single physical antenna or a composite channel from multiple physical antenna elements that together make up the antenna port. For ports, see also section 8.2 of S. Sesia, I. Toufik, and M, Baker, LTE: The UMTS Long Term Evolution, Second Edition.

Different ports may differ from each other in resource elements such as cyclic shifts, combs (the comb defines the difference between subcarriers, and subcarriers with alternating subcarrier indices are grouped into different combs) and orthogonal cover codes (Orthogonal Cover Code, OCC). As can be seen in FIG. 4, the ports are divided into Code Division Multiplexing (CDM) groups, with each CDM group using a corresponding SSN (such as the Walsh-Hadamard time division multiplexing in the case of two symbol DMRS). Resource elements can be combined into element sets and element sets assigned to ports.

It can be considered that all DMRS ports in the same CDM group are Quasi-Co-Located (QCL), i.e. similar assumptions are made regarding the channel correlation between these DMRS ports, eg, Doppler shift, Doppler spread, average delay, and delay spread.

When scheduling data channel transmission, for example, when scheduling PDSCH, one or more layers are scheduled. The term "spatial layer" (or layer) refers to one of the various streams generated by spatial multiplexing. The layer can be described as the mapping of symbols to the ports of the transmitting antenna. Each layer is identified by a precoding vector, the size of which is equal to the number of transmit antenna ports and can be associated with a radiation pattern. The transmission rank is the number of levels transmitted. A codeword is an independently encoded data block corresponding to a single Transport Block (TB) delivered from the Medium Access Control (MAC) layer in the transmitter to the physical layer, and is protected by cyclic redundant parity check (Cyclic Redundancy Check, CRC). Typically, a layer is assigned to a Transmission Time Interval (TTI), which corresponds to a subframe in LTE. However, there may be other TTIs in NR depending on the URLLC or eMBV. In particular, in NR, the TTI may be a slot, a minislot, or a subframe. See also section 11.2.2.2 of S. Sesia, I. Toufik and M, Baker, LTE: The UMTS Long Term Evolution, Second Edition for levels, ranks, and codewords.

In general, TTI defines the timing granularity for a scheduling assignment. One TTI is the time interval during which these signals are mapped to the physical layer. For example, typically the length of the TTI may vary from 14 symbols (slot-based scheduling) to 2 symbols (non-slot-based scheduling). It is specified that downlink and uplink transmissions should be organized into frames (10 ms long) consisting of 10 subframes (1 ms long). In slot-based transmission, the subframe is in turn divided into slots, the number of slots being determined by the numerology/subcarrier spacing and predetermined values ranging from 10 slots for a subcarrier spacing of 15 kHz to 320 slots for a subcarrier spacing of 240 kHz. The number of OFDM symbols per slot is 14 for normal cyclic prefix and 12 for extended cyclic prefix (see sections 4.1 (general frame structure), 4.2 (numerologies), 4.3.1 (frames and subframes) and 4.3.2 (slots) of the technical specification 3GPP TS 38.21 1 V15.0.0 (2017-12)). However, the assignment of temporary resources for transmission may also be non-slot based. In particular, TTIs in a non-slot based assignment may correspond to minislots rather than slots. That is, the requested data transmission/control signaling may be assigned one or more minislots. In a non-slot-based assignment, the minimum TTI length can typically be 2 OFDM symbols.

Layers are mapped to DMRS port numbers using port indication tables, which are defined in chapter 7 of 3GPP TS 38.212 V15.2.0. For example, for scheduling the PDSCH and PUSCH use the 1-1 format and the 0-1 DCI format, respectively. Each of these formats contains a field called "antenna ports" which is used to refer to these tables for mapping levels to ports. In NR Release 15, the specification for layer-to-port mapping is based on the assumption that a single TRP is transmitted. This means that the table contains entries where DMRS ports in the same CDM group are mapped to multiple layers for transmission on one TRP. If this mapping is applied to multiple TRP transmissions, for example, if layer 1 is transmitted on TRP1 and layer 2 is transmitted on TRP2, then the DMRS port mapping for the two layers is such that the two ports are considered quasi-stacked (QCL-ed). This kind of mapping can be applied to a single TRP or multiple TRPs that are close enough to each other that the DMRS ports can be considered quasi-co-located.

However, in the case where the plurality of TRPs are quite far apart and the plurality of layers are transmitted on different TRPs, the present invention assumes that the DMRS ports assigned to these layers are not quasi-co-located due to the different geographic location of the TRPs, i. not in the same CDM group. Therefore, in the case of multiple TRPs, new tables with either modified or additional entries can make it easier to support mapping of non-quasi-ported DMRS layers. Some other possible signaling modifications may further facilitate scheduling over a single PDCCH.

The DCI format 1-1 (Section 7.3.1.2.2 of 3GPP TS 38.212 V15.2.0), which is used for PDSCH scheduling, contains a field called Transmission Configuration Indication (TCI), which is used to indicate one of eight TCI states with using 3 bits if configured. The UE may be configured with a list containing up to M configuration TCI states within a higher layer (a higher layer in this context means a layer above the physical layer) whose PDSCH-Config parameter is configured in Radio Resource Control (RRC) signaling (in the example of the above format 1-1 DCI M=8 according to the maximum number of bits in the TCI field equal to 3). Each TCI state contains a parameter for configuring a quasi-co-registration relationship between one or two downlink reference signals and the DM-RS ports of the PDSCH. Further information on the different types of QCLs and other relevant information can be found in section 5.1.5 of the 3GPP TS 38.212 V15.2.0 specification. Accordingly, one PDCCH (one DCI) has up to 3 bits for TCI signaling to indicate one of eight configured states that signals QCL admission for a TRP and assumes the same QCL admission for other TRPs scheduled by the PDCCH. With this QCL assumption, the TCI state information signaled by the DCI is applicable in particular to the transmission of a single TRP, since the same QCL relationship may be invalid for one of the other TRPs that are far apart. Some modifications may facilitate support for independent TCI state signaling for multiple TRPs using a single PDCCH. For example, TRPs that are geographically distant should have a different QCL assumption, hence independent TCI status signaling for each TRP.

As shown in FIG. 5, the present invention provides a user equipment 510 that includes a transceiver 520 (receiver/transmitter) and a circuit 530 (processing circuit). The transceiver 520 (or "UE transceiver") during operation receives downlink control (DCI) information on the PDCCH to schedule multiple transmissions or receptions between the UE and multiple transmission and reception points (TRPs, such as TRP1 and TRP2 shown in FIG. 2 and 3) over a plurality of channels, wherein the DCI comprises one or more indicators indicating one or more relevant parameters. The circuit 530 (or “circuit 11E”, which may include a transmission parameter acquisition circuit 535) during operation obtains, based on one or more indicators and a configuration, a plurality of values, respectively, of one or more transmission parameters. UE transceiver 520 performs a plurality of transmissions or receptions using a corresponding one of a plurality of values of one or more transmission parameters for each of the plurality of transmissions or receptions.

In addition, provided and also shown in FIG. 5, a network node 560 comprising a transceiver 570 and a circuit 580. The circuit 580 (or "network node circuit", which may include a transmission parameter determination circuit 585), during operation determines a plurality of values, respectively, of one or more transmission parameters for a plurality of transmissions and receptions between a plurality of transmission and reception points (TRP) and a user equipment (UE) and generates downlink control information (DCI) for scheduling a plurality of transmissions or receptions, wherein the DCI comprises one or more indicators indicating one or more corresponding transmission parameters, wherein one or more indicators in combination with the configuration indicate a plurality of values, respectively, of one or more transmission parameters. The network node transceiver 570 transmits DCI on the PDCCH during operation.

As also shown in FIG. 5, UE 510 and network node 560 communicate with each other via at least one communication channel, such as a wireless channel or a radio channel in a wireless or radio communication system such as NR, LTE, or LTE-A.

The transceiver (UE transceiver 520 and network node transceiver 570) includes hardware, such as one or more antennas, and software that controls the transmission and/or reception performed by the hardware.

According to the above-disclosed UE and the network node, the present invention also provides a communication method for a user equipment ("UE method" and a communication method for a network node ("Network node method"). Fig. 6 shows the method steps for a UE and method for the network node.

In method step S610, a plurality of values, respectively, of one or more transmission parameters for a plurality of transmissions and receptions between a plurality of transmission and reception points (TRP) and a user equipment (UE) are determined for the network node. In method step S620, downlink control information (DCI) is generated for the network node for scheduling a plurality of transmissions or receptions. The DCI comprises one or more indicators indicating one or more corresponding transmission parameters, wherein the one or more indicators in combination with the configuration indicate a plurality of values of the one or more transmission parameters, respectively. Next, in step S630, the DCI is transmitted on the PDCCH and received at the UE side in step S635 of the method for the UE. In method step S645, a set of corresponding values of one or more transmission parameters is obtained for the UE based on one or more indicators and a configuration. In method step S655, the UE performs a plurality of transmissions or receptions using a corresponding one of the plurality of values of one or more transmission parameters for each of the plurality of transmissions or receptions.

The techniques disclosed herein may facilitate signaling to specify a separate mapping of DMRS ports to TCI levels and state for multiple TRPs using a single PDCCH. For example, this may help ensure that the DCI overhead does not increase (or the DCI overhead does not increase significantly) as the number of TRPs increases. In addition, it can encourage the reuse of methods from existing specifications. In addition, the disclosed techniques may help provide scalability and flexibility in view of the possible large number of TRPs. In addition, URLLC communication can be facilitated.

The following are details of the devices disclosed above and the corresponding methods and embodiments thereof.

As stated above, the transmission (network node) and reception (UE) of the DCI on the PDCCH may be one PDCCH in communication in the case of multiple TRPs. For example, the PDCCH schedules a plurality of transmissions/receptions each performed on one of the plurality of channels, respectively, using one of the plurality of TRPs.

The DCI contains one or more indicators that respectively indicate one or more transmission parameters. In particular, the transmission parameters may be transmission parameters related to the QCL. For example, the DCI may contain one or both of the above TCI parameters and the configuration index from the DMRS port indication table, and the values of one or more of these parameters may be determined (network node) and obtained (UE).

Corresponding values of one or more transmission parameters may be obtained or may be inferred based on one or more transmission parameters. For example, one or more of the values may be derived from a combination of a configuration and a parameter in the DCI corresponding to that value respectively. In addition, the configuration may be a combination of a statically configured part (which may be defined in the standard) and a "semi-statically" configured part that is configured in higher layer signaling such as RRC signaling. For example, a semi-statically signaled configuration (or part of a configuration) contains an element or parameter that permits the use of a "multi-TRP" configuration that is provided in the configuration, possibly in addition to the "single-TRP" configuration.

A single TRP configuration may contain the aforementioned TCI state variable configuration or one or more port indication tables, such as the aforementioned port indication tables defined in chapter 7 of 3GPP TS 38.212 V15.2.0, which may be referred to as single TRP configuration tables. A multiple TRP configuration may contain additional port indication tables, such as tables that have been designed to be used in combination for multiple TRPs. These additional tables may be included in the static configuration or signaled by RRC.

There are several possible combinations between configuration and parameter(s) combinations included in the DCI. For example, a multi-TRP configuration may provide additional pointers or parameters for a single-TRP configuration that may be included in an additionally configured table. In addition, for example, the interpretation of a parameter in DCI may be determined based on an enable parameter or a Radio Network Temporary Identifier (RNTI) included in the configuration. Based on the enable parameter or RNTI (e.g., a specific RNTI among a plurality of configured RNTIs) used for scrambling (network node)/descrambling (UE) of the Cyclic Redundancy Check (CRC) attached to the DCI, the UE determines one (e.g., , in the case of one TRP) or more (multiple TRP) parameter values according to a single TRP configuration, a multiple TRP configuration, or a combination of a single TRP configuration and a multiple TRP configuration, such as a plurality of pointers to a single TRP configuration.

The UE transceiver 520 during operation performs a plurality of transmissions to or receptions from a plurality of TRPs using, for each such transmission, or at least two of the plurality of transmissions, a corresponding transmission parameter value. For example, the UE uses the respective TCI state values for the respective TRPs. Further, as an example, the UE may use a correspondingly different DMRS port indication value to transmit or receive from each of the plurality of TRPs. The corresponding transmission parameter values (eg, DMRS port indication and/or TCI status) for different TRPs may differ in their QCL assumption.

Multiple transmissions to or receptions from multiple TRPs may be transmissions of the same data/codewords or different data/codewords. For example, the respective codewords of the two transmitted/received codewords may be the same or different. In addition, the same data may be transmitted/received using the same or different Modulation and Coding Scheme (MCS) and/or redundancy versions. In addition, different levels of the same codeword may be transmitted to or received from different TRPs.

The plurality of transmissions or receptions may be uplink or downlink transmissions/receptions of data or control information on channels such as PDSCH, PUSCH, or PUCCH. For example, either a UE transmits data and/or control information to a plurality of TRPs, or a plurality of TRPs transmit data and/or control information to a UE.

For example, the plurality of transmissions or receptions scheduled by DCI are uplink transmissions from the UE to the plurality of TRPs, or the plurality of transmissions are the downlink transmissions from the plurality of TRPs to the UE. It is also possible that the plurality of DCI scheduled transmissions/receptions comprise one or more uplink transmissions as well as one or more downlink transmissions.

As mentioned, communication with multiple TRPs may include the case where each TRP is respectively provided with an RF block and baseband scheme, and the case where one baseband scheme is shared by multiple TRPs each containing a corresponding RF block. Accordingly, network node 560 contains one or more TRPs. For example, one or more TRPs are included in the transceiver 570 of the network node. However, the set of TRPs may also contain TRPs that are not included in the network node 560. For example, the network node may determine the value(s) for the transmission parameter(s) and transmit those values to another baseband scheme, possibly included in another network node. , via an ideal or non-ideal backhaul network link. In an alternative implementation, a network node may determine the transmission parameters by receiving control information over an ideal or non-ideal back transport network link from another network node/baseband scheme.

Accordingly, in some implementations, the network node transceiver 570 during operation performs at least one of a plurality of transmissions or receptions using a corresponding one of a plurality of values of one or more transmission parameters for each of the plurality of transmissions or receptions. At least one transmission or reception is performed between the UE and at least one of the plurality of TRPs. Thus, in these embodiments, the method for the network node includes a transmitting or receiving step S660 performing at least one (one, several, or each) of a plurality of transmissions. In this case, one, several or each of the plurality of TRPs are respectively used.

As mentioned, in some embodiments, one or more transmission parameters comprise at least one of a demodulation reference signal (DMRS), a port indication, and a transmission configuration indication (TCI) state. In addition, several implementations are described herein, including various elements such as RNTI or enable parameters in RRC signaling, combination tables that can be signaled in RRC or statically configured, and combinations of the above elements. In the following, some embodiments will be described in more detail.

RNTI-Based Implementations

In some implementations, the configuration contains an RNTI, or an RNTI can be derived from it, which is used by the network node to scramble the cyclic redundancy check (CRC) attached to the DCI. The UE circuit 530 during operation descrambles the CRC attached to the DCI using the RNTI, the RNTI indicating the value of at least one of a plurality of transmission parameter values, either alone or in combination with one of the indicators in the DCI signaling.

For example, the RNTI (in particular, the numeric value of the RNTI) may correspond to the value of the transmission parameter. For example, there is a mapping between possible RNTI numeric values, where at least one of the numeric values is possibly configured statically or in RRC signaling. The DCI field of the same parameter may be used for the parameter value of the first transmission of the first TRP or the first reception from it, while the value indicated by the RNTI is the parameter value for the second transmission of the second TRP or the second reception from it. Additionally or alternatively, the RNTI may indicate that, for the same or a different transmission parameter, the corresponding field in the DCI is to be interpreted as a value representing a plurality (e.g., two) of transmission parameter values for a plurality of transmissions/receptions via a plurality of TRPs, wherein the mapping between the value in DCI and a set of values may be defined by a combination table included in the configuration.

Accordingly, the present disclosure provides some implementations based on the RNTI based approach. In particular, there are several possibilities for using RNTI. For example, either a new UE-specific RNTI for multiple TRP-specific signaling may be introduced, or the functionality of a UE-specific RNTI that already serves some functions such as MCS-C-RNTI (MCS Cell RNTI) may be improved to further indicate signaling specific to a set of TRPs.

RNTI-based embodiments of the present invention may be implemented without additional DCI overhead. Instead of including other values for a given transmission parameter in the DCI, an additional value for a given parameter may be obtained from the RNTI or from the table pointed to by the RNTI. At the same time, independent indication for different TRPs can be facilitated. In addition, a unified approach to the various signaling generated, such as DMRS and TCI signaling, is proposed, since the RNTI can serve as an indicator for a DMRS port indication, a TCI status indication, both indications, or some additional fields.

For example, a new UE-specific RNTI is configured via RRC, or a re-existing RNTI is used, such as MCS-C-RNTI, wherein:

scrambling using the new RNTI indirectly indicates the use of a different DMRS port indication table for a plurality of TRPs, for example, a DMRS port indication table for a plurality of TRPs, different from the DMRS port indication table for a single TRP, as discussed above; and/or

the specific RNTI value that scrambles the DCI CRC (the CRC attached to the DCI) is used to indicate the TCI status for an additional TRP (e.g., a TRP not used for PDCCH transmission), whether for a new RNTI or an existing RNTI (or derived from a configured or existing RNTI) configure more than one value with enhanced functionality.

Tables for multiple TRPs, such as DMRS port indication tables, which are designed and specified for the case of multiple TRPs, may be defined in the standard.

A communication method in which an RNTI-based approach is used to specify a plurality of TRPs may include the following exemplary steps:

1. If the RRC does not configure a new RNTI or enhance (e.g., define additional functionality for) an existing RNTI, then the existing method is followed, e.g., using the existing signaling structure, e.g., the method used in connection with a single TRP, including possibly including a DMRS port indication table for one TRP.

2. If the RRC configures a new RNTI or uses the enhanced functionality of an existing RNTI, then the next steps are based on the result of the DCI CRC descrambling.

3. If the DCI CRC is not scrambled using this RNTI, then the existing method is followed, eg using the existing signaling structure.

4. If the DCI CRC is scrambled with one possible value of this RNTI, then perform the following procedure:

a. Use the new DMRS port mapping table.

b. When descrambling, the UE determines the RNTI value used for scrambling and calculates the TCI state for the second TRP (other than the first TRP from which the DCI was signaled on the PDCCH).

c. The TCI state of the first TRP is signaled by an existing bit field (one of the indicators) included in the DCI.

However, as will be further described in some implementation examples, step a may be used separately and independently of steps b and c. In addition, steps b and c can be performed without step a. In particular, depending on whether the RNTI of a set of TRPs is used i) to indicate a new DMRS table for a set of TRPs, and) to indicate 2 or more TCI status values for 2 TRPs or a set of TRPs, or iii) to indicate a new DMRS table for a set TRP, the aforementioned steps 1 to 4 of the multi-TRP communication method may vary. In cases i) and iii), the use of the existing structure includes the use of the DMRS port indication table for one TRP. Wherein in case i) step 4 includes step a, in case i) step 4) includes steps b and c, and in case iii) step 4) includes steps a-c. In addition, as mentioned above, an RNTI is a dedicated RNTI or a given RNTI enhanced by functionality for a plurality of TRPs that are configured. In cases N) and iii), the K potential RNTI values are configured, or they can be de-configured as will be described later.

It should also be noted that the present invention is not limited as to which kind of indicator (DCI or RNTI bitfield) is applied to which TRP. For example, contrary to the above description, the bit field in TCI may be applied to a TRP from which no PDCCH was transmitted, such as the aforementioned second TRP. On FIG. 7 shows an example structure of a parameter acquisition circuit 535, including a descrambling circuit 736, and including at least one of a table selection circuit 737 and a TCI state acquisition circuit 738.

In some embodiments, the RNTI is used to indicate the DMRS table for communication in case of multiple TRPs. The configuration comprises a first DMRS port indication table and a second DMRS port indication table. The UE circuit 530 during operation descrambles the cyclic redundancy check (CRC) attached to the DCI using a radio network temporary identifier (RNTI) that is included in the configuration or can be derived from it. The RNTI indicates that the second DMRS port indication table should be used for at least one of the plurality of transmissions or receptions. The UE transceiver 520 during operation performs, in accordance with the result of successful completion of the CRC descrambling using the RNTI, at least one of a plurality of transmissions or receptions using the second DMRS port indication table, wherein the indicator indicates the DMRS port indication from the second DMRS port indication table.

Table 1 is an example of a DMRS port indication table that can be used for communication in the case of multiple TRPs in the case of a DMRS type 1 configuration and one character length. Accordingly, Table 1 is an example of the above-mentioned second DMRS port indication table (or "port indication table for multiple TRPs"), while the first DMRS port indication table may be a "one TRP" DMRS port indication table. As can be seen in FIG. 4, ports 0 and 1 are quasi-co-located (because they are in the same CDM group), and ports 2 and 3 are also co-located. The column "Number of DMRS CDM groups without data" indicates the number of CDM groups that are signaled by reference signals (and not data) or that are occupied by another UE for DMRS transmission/reception (and therefore contain no data for the user equipment in question).

The Value column contains indexes of other rows corresponding to DMRS configurations. The string DMRS configuration is dynamically scheduled for the UE via a four-bit field in the DCI. Accordingly, the DMRS port indication is one of the transmission parameters based on which a plurality of transmissions or receptions are performed. This four-bit field is an indicator that specifies one of the indexes corresponding to the "Value" column indicating the DMRS port indication from the table.

Therefore, according to the result of successful CRC descrambling, the DMRS port indication to be used for a plurality of transmissions or receptions is derived from the second DMRS port indication table, and not from the first DMRS port indication table, if the RNTI used for scrambling is the RNTI, having functionality for multiple TRPs. In this case, the indicator in the DCI indicates an entry from the "Value" column of the second, rather than the first, DMRS port indication table, and this value corresponds to the set of ports that are defined in the corresponding row in the "DMRS port(s)" column containing the set of non-quasi-co-located ports assigned respectively to the plurality of TRPs.

In addition, Table 1 shows the case where only one codeword (codeword 1) is allowed. In such a case, different levels of the codeword may be transmitted to or received from different TRPs. Rows indicated by values 7 to 12 (entries 7 to 12) can be used for multiple TRP transmissions and receptions. In lines 7 and 8, the specified port combinations (0, 2) and (0, 3) are both not quasi-stacked, and therefore can be used for transmissions using two ports. Each of entries 10 through 12 denote combinations containing at least two quasi-stacked ports. If these combinations are for three levels (entries 10, 11) or four levels (entry 12), quasi-stacked ports map to the same TRP, while ports belonging to different CDM groups map to different TRPs.

However, Table 1 is an example, and the present invention can be applied using other DMRS port indication tables. For example, more than one codeword may be allowed. In this case, the levels of different codewords can be mapped to different TRPs.

As mentioned above, instead of or in combination with the previously described output of DMRS port indication values, the result of a successful RNTI descrambling may be used to indicate the TCI state of transmission or reception from one of the plurality of TRPs.

In some embodiments, an indicator included in the DCI indicates the first value of a plurality of TCI state values. In addition, the RNTI is one of K RNTI candidates, where the first of the K RNTI candidates is included in the configuration, and the RNTI candidates are K successive integers respectively indicating the K configured TCI states signaled by Radio Resource Control (RRC). ), and the UE circuit 530 during operation determines the first TCI state value based on the indicator, and obtains the second value from the set of TCI state values based on the result of successful descrambling of the CRC attached to the DCI, using as the RNTI the candidate RNTI indicating the RNTI to be used. the TCI state as the second value of the K TCI states.

In embodiments in which the RNTI indicates the state of the TCI to transmit, the RNTI may optionally indicate the use of the second DMRS port table, as described above.

RNTI is one of the K potential options (where K is an integer). Since there are K possible values that the RNTI can take on (which can be used by the network node circuitry 580 to scramble the DCI CRC), the set of RNTI candidates can be considered a multi-valued (or multi-valued) RNTI or an RNTI configured with more than one value. The TCI state value for transmitting or receiving from the second TRP is determined based on a mapping between RNTI value candidates and configured (by RRC) TCI states.

When the RNTI is configured with more than one value, the index value or second TCI state parameter value for the transmitting and receiving point TRP2 can be calculated as follows, while the TCI state value for the transmitting and receiving point TRP1 is indicated by an indicator (bit field or bitmap ) included in the DCI. In the following description, K is assumed to be 8, but the value of K may generally be greater (eg, 16) or less (eg, 4) than 8, and may vary over time according to the configuration of the RRC:

The DCI CRC is scrambled by the network node circuitry 580 using one of the 8 values, such as value 5, the 8 values being a set of K potential RNTIs.

The UE receives the DCI and starts descrambling the CRC using value 1, value 2, value 3, and so on in sequence. until it successfully descrambles the CRC using one of these values (eg, value 5).

The UE successfully descrambles the CRC using the value 5 and, for example, performs a modulo function to the value 5 and 8 (performs a modulo 5 modulo 8 operation) to determine a value indicating the state of the TCI to transmit to or receive from the TRP2 point.

The result of the modulo function indicates the TCI state of the RRC configured TCI states for TRP2.

In the above description, RNTI candidates are mapped to TCI state values by a modulo function (mod). However, other functions or operations may be applied to determine the mapping of RNTIs to corresponding TCI states. For example, the UE may use a counter that increments with each attempt to descramble the DCI CRC.

In addition, as mentioned above, if none of the potential RNTI options for a set of TRPs can successfully descramble the CRC, then another method, possibly not associated with a set of TRPs, can then be applied. For example, the DCI CRC may be scrambled by the network node using another configured RNTI that is not related to the TRP set, such as a C-RNTI with no additional capabilities for the TRP set ("non-TRP set RNTI"). Accordingly, at the UE side, the transceiver 520 may make one or more further attempts to descramble the DCI using a non-TRP RNTI. Descrambling attempts using candidate RNTIs for a set of TRPs may be performed before or, if necessary, after attempts to use RNTIs not related to a set of TRPs. Using potential RNTIs for multiple TRPs first can help prioritize TRP communications, for example, if channel characteristics are critical to frequently needing multiple TRP transmissions. On the other hand, using an RNTI that is not related to a set of TRPs first may help speed up processing or reduce the processing required in the case where association with a single TRP is likely.

Next, how a plurality of potential RNTI candidates is configured will be explained. It may be sufficient to signal to the UE only the initial value of the RNTI (or a potential RNTI) via RRC. The UE may assume that K subsequent numbers (e.g., integers) of RNTI values also belong to this multivalued RNTI or a set of candidates from K RNTI candidates and may be used to scramble the RNTI (RNTI for a set of TRPs or possibly an improved C -RNTI) on the network node side. The exact number of K values depends on the number of TCI states, which are configured by dynamic or static indication field (in RRC). From a total of eg 128 TCI states included in the static configuration (eg from the standard), the network node selects eg 8 states and signals these 8 states to the UE via RRC. 8 may correspond to the maximum number of TCI states that can be configured by RRC according to the bit field size (eg, 3 bits) in DCI. Say, in the example with one additional TRP, the number of K RNTIs may be 8. Thus, the RNTI output from the configuration includes the case in which the RNTI used to scramble/successfully descramble the DCI CRC is one of the K contiguous /subsequent or otherwise related values, such as integer values, that can be obtained/derived from the initial RNTI signaled in the RRC configuration by a numeric operation such as increment or decrement.

However, the K RNTI potentials may also indicate a plurality of TCI state values, for example, for the second TRP (TRP2) and the third TRP (TRP3). Then, if 4 states are configured by RRC rather than the maximum allowed 8 states, 16 corresponding RNTI candidates can be mapped to combinations of corresponding TCI states for TRP2 and TRP3.

In accordance with some embodiments, at least one of the indicators in the DCI and RNTI indicates the TCI state for the set of TRPs, wherein the TCI state for the set of TRPs contains more than one TCI state for transmitting more than one TRP or receiving from more than one TRP, respectively.

For example, a state for a plurality of TRPs may be a combination of corresponding TCI states for a plurality of TRPs, such as TRP2 and TRP3, as described above.

In yet another example, steps 1 to 4 above, or the like, are performed, wherein the TCI state index (TCI transmission parameter included in the DCI) contains information on more than one TRP. Meanwhile, the TCI states to be signaled by RRC may be configured differently.

For example, the TCI index corresponding to the TCI state transfer parameter may be configured to indicate TCI state information for more than one TRP. This may result in an increase in the number of indexes, for example the DCI field for the TCI indication may or may not be redefined to contain more than 3 bits. In general, the exact number of configured TCI states for multiple TRPs may depend on scenarios (eg, the number of configured TRPs and/or TRP locations relative to the UE and relative to each other).

The TCI index may be configured to indicate TCI state information for more than one TRP through a table that maps the TCI index to more than one TCI state. Table 2 and Table 3 are shown below. Table 2 indicates the TCI status indexes for 1 additional TRP, Table 3 indicates the TCI statuses for 2 additional TRPs.

The TCI state transfer parameter in DCI, the RNTI value successfully descrambling the CRC, or both, the TCI state transfer parameter and the RNTI value may, according to a configuration possibly signaled by the RRC, point to a TCI state table for the TRP, such as table 3 for two TRPs. . Whether the UE should interpret the DCI and/or RNTI parameter as pointing to a table for one TRP (Table 2) or a table for multiple TRPs (Table 3) can be configured by RRC.

In addition, as shown above, Table 3 for the set of TRPs in the TO state column may indicate the TCI states of Table 2. In this case, since Table 3 refers to (depends on) Table 2, both types of tables can be configured by RRC. In an alternative implementation, states for multiple TRPs may also be defined in the standard and statically configured. In the latter case, a table for a set of TRPs may be configured in an RRC that does not refer to states for a single TRP from a TCI table for a single TRP, but instead may refer to statically configured states for a set of TRPs (e.g., state indexes for a set of TRPs in static configuration).

Combination table-based implementations

Table 3 above maps the index values to the TCI state combinations to be applied for the TRP combinations. Therefore, table 3 can be considered as a table of combinations. Further, several more examples and implementations are disclosed, in which combination tables are used to indicate values for communication in the case of multiple TRPs. This description shows the possibility of creating or resolving intermediate combination tables by RRC for signaling in case of multiple TRPs. The general structure of the combination table may contain a number of indexes, each index of this table corresponding to a row and indicating a combination of different TRP identifiers and a corresponding combination of DCI bitmap field indexes for a given parameter (such as DMRS port indication, TCI status, etc.). ). If a combination table is configured and enabled by RRC, then the corresponding bitmap in the DCI can be used to indicate the index of the new combination table instead of the original indication of the corresponding parameter/index (for example, the index of the "Value" column of table 1 or the "Index" column of table 2) for case with one TRP.

Table 4 shows an example of a possible general indication table structure for a single TRP, and Table 5 shows a general combination table structure for multiple TRPs.

Examples of parameter indication tables for one TRP include DMRS port indication tables and TCI status indication tables (see Table 2). It should be noted that although the parameter indication table 4 for one TRP has one column "Information for one TRP", such information can be divided among more columns, for example, in the DMRS port indication table containing columns of information respectively about DMRS groups without data and about DMRS ports.

A parameter indication table for one TRP, such as table 4, may have Z rows (indices) according to the size of the corresponding field in the DCI. To indicate the X parameter, a DCI field of Y bits is used, as shown in Table 4, with 2^Y>=Z.

In the present invention, the term "for a single TRP" is used to distinguish it from tables or parameters that are specifically designed or configured for multiple TRP applications as disclosed herein. For example, the "for one TRP" DMRS port indication tables from the standard as mentioned above may also be applicable to multiple TRP communications to some extent. In addition, in some embodiments, combination tables are combined with tables for one TRP to indicate an indication of a parameter value. Tables for a single TRP are also referred to as "existing" tables and can also be used for non-multi-TRP scenarios, as they must be present ("exist") in order for the combination tables to refer to them. In addition, in Table 5, "X" denotes a given transmission parameter, for example, the DMRS port indication of the TCI state, as indicated by the indication table for one TRP.

As can be seen, table 3 satisfies the structure of the total combination table 5, and therefore can be considered as an example of a combination table for a set of TRPs. Accordingly, the techniques shown in the Combination-Based Implementations section, such as configuring, RRC signaling, RRC combination table resolution and indexing, can also be applied to combination table 3 shown in the previous section of this description.

For example, the combination table may contain 3 columns and Z indexes (Z is the same number of indexes as for the parameter indication table for one TRP), as can be seen from Table 5. The first column is an index to be signaled by DCI. The second column is a combination of TRPs, e.g. sets of TRPs, respectively containing one or more TRPs, according to which information for parameter X is to be signaled. (for one TRP) and specifies the X parameter information for the corresponding TRPs for that index.

In each row (matching set), the number of TRPs in the TRP Combination column (second column) is the same as the number of indexes in the Index Combination column (third column). For example, the indices in the third column correspond to the TRPs in the second column in the order listed (the first value corresponds to the first TRP listed on the same row, the second value corresponds to the second TRP, and so on).

In addition, the combination table can be called an "intermediate" combination table, since it is inserted into the chain/hierarchy of links in an intermediate position, which can be, for example, the following: parameter in DCI -> intermediate combination table -> indication table (set of values) of one TRP -> static configuration.

In some implementations, the configuration comprises a set of mappings between TRP sets and sets of candidate values of one or more transmission parameters, and at least one indicator of one or more indicators included in the DCI indicates, from among the mapping set, a mapping between one of the TRP sets, to be used as the set of TRPs, and one of the sets of potential values to be used as the set of values of one or more transmission parameters to be used for the set of transmissions or receptions.

An example of a parameter derivation scheme 535 for implementations in which the configuration contains a set of mappings between TRP sets and candidate value sets is shown in FIG. 8. For example, the parameter acquisition circuit comprises a combination table selection circuit 836 (or a combination table resolution circuit) and a set value acquisition circuit 837 .

For example, a set of mappings between sets of TRPs and sets of candidate values is determined by means of an intermediate combination table. Each row from the combination table can respectively define one match from the set of matches. The TRP sets correspond to the corresponding entries in the "TRP combination" column of the combination table. Based on the indication in the DCI (transmission parameter value), one of the determined/received TRP sets becomes the TRP set used for transmission or reception in conjunction with one or more indexes in the "Existing table index combination for X" column in Table 5.

In addition, it can be seen that the total table of 5 combinations contains entries of one TRP (in rows with index "0" and "1"). Accordingly, in addition to indicating multiple transmissions to, or receptions from, multiple TRPs, the DCI signaling, in conjunction with the combination table, may indicate a single value for a given transmit or receive parameter using a single TRP. A combination table containing one or more rows referring to one TRP can facilitate flexible switching between different TRPs, as well as switching between transmissions/receptions of a single TRP and transmissions/receptions of multiple TRPs.

As mentioned, the bit field for parameter X indicates the row of the combination table, and the number of rows/indexes of the combination table may be equal to or less than the number of rows of the parameter indication table (Table 4). Accordingly, implementations using a mapping set (combination table) can be implemented without generating additional DCI overhead. However, the number of rows of the combination table may also generally be greater than the number of rows of the parameter indication table. In general, a flexible and scalable method is proposed that can facilitate communication between a UE and a large number of TRPs. In addition, a set of mappings may be applicable to other DCI fields intended for use in single TRP applications or without considering the case of multiple TRPs, and to one or more DCI fields at a particular point in time.

The combination table for parameter X may be configured as a new table, and different (eg, static and dynamic) configurations may be applied.

In some implementations, the mapping set contains M mappings from among N statically configured mappings, where M is equal to or less than N, and the UE transceiver 520 receives M indices during operation, respectively indicating M mappings, which are signaled by the network node transceiver 570 via RRC, and at least one indicator indicates an index that indicates a mapping between the plurality of TRPs and the plurality of values of one or more transmission parameters to be used for the plurality of transmissions or receptions.

Accordingly, the combination table may be statically configured to contain N rows corresponding to mappings between a set of TRPs and a set of candidate options, and correspondingly N indices that cover various combinations (e.g., all possible combinations of TRPs or a set of desired/required TRP). N statically configured indexes constitute an extended set of indexes.

The network node 560 then signals a (sub-)set of M indices (M<=N) from the extended set of N indices. A set of M indexes corresponds to a set of M mappings between sets of TRPs and sets of candidate values, from which the parameter to be used for transmissions or receptions is selected by means of the DCI field. The network node dynamically indicates, using the DCI bit field for parameter X, one index (sub-) of the set of user equipment (UE) mappings that the UE is informed about by RRC.

However, a combination table (not just a subset of indexes of a statically configured combination table) can be signaled by RRC signaling. The combination table, whether configured statically or via RRC, may have the structure of table 5.

In some implementations, the contents of a mapping table that defines a set of mappings between TRP sets and candidate values (index) are signaled by RRC.

For example, RRC dynamically configures a new combination table that defines a set of mappings, and the entire table (eg, lists of corresponding column entries) is signaled to the UE by RRC signaling. The length of the combination table configured by RRC may vary depending on the number of TRPs and the scenario, for example. The network node, using the DCI bit field for parameter X, dynamically indicates to the UE one index from the combination table configured by RRC.

For example, RRC signaling to indicate a list of indexes in the new combination table for parameter X may be signaled in the RRC "PDSCH-Config" information element, as shown in FIG. 9, where the definition relating to parameter X is shown in bold. As also shown in the examples in FIG. 10 and 11, the parameter X may be, for example, a DMRS port indication and/or a TCI state. It is through this information element that the content of each combination table index is communicated to the UE in a manner similar to the other parameters also included in this information element. Through RRC signaling, the UE obtains information containing the number of combination table indexes and contents of each index corresponding to TRP sets and candidate value sets (index values of corresponding indication table rows for one TRP) of the combination table.

If the combination table is not configured by static configuration or by RRC, then a method can be further performed in which a field in the DCI directly points to an indication table (for one TRP), such as a DMRS port indication table or a TCI configured state table.

The combination table format may be statically defined, including the number of columns and information to be received in each column (the type of information contained in each column, such as "TRP Set" and "Existing Table Index Combination"). The format of the combination table (or combination table) may be static and the same regardless of the number of TRPs.

As mentioned, the RRC PDSCH Configuration Element (PDSCH-Config) specifies the number of indexes and the contents of each index. The number of indexes and table contents (mappings between TRP sets and candidate value sets) differ depending on the number of TRPs to be included for which the combination table is used (number of TRPs from which corresponding TRP sets are selected/formed). However, the format of the table, including the number of columns and their interpretation, can be the same regardless of the number of TRPs for which the X parameter needs to be specified. the contents of the combination table. Table 7 is an example of a combination table for a case with two TRPs, and table 8 is an example of a combination table for a case with four TRPs.

For some communication systems or scenarios, it may be defined or specified that if a combination table is configured (via RRC and/or static combination), this combination table should be used to specify values for parameter X or more parameters. However, if the combination table is configured, other permission mechanisms may be implemented to enable or disable the use of the combination table for a plurality of TRPs (eg, to "turn on and off" communication with a plurality of TRPs).

For example, a parameter may be included in the PDCCH Information Element (IE) to indicate to the UE whether to use a new combination table, and the DCI bit field for this parameter should or may not indicate this new combination table. For example, as shown in FIG. 12, the presence of a combination table, as well as the permission to use this combination table, can be signaled in the ControlResourceSet information element of the RRC signaling. The UE transceiver 520 during operation receives a grant parameter that indicates that a plurality of transmissions or receptions should be performed based on a set of mappings, and which is signaled by RRC, and the UE circuit 530 during operation determines, based on the grant parameter, that the plurality of transmissions or receptions must be performed based on a set of mappings.

Here, "parameter_X" may be a parameter for DMRS port indication, TCI status indication, or some other parameter. As shown in FIG. 13, an enable parameter such as DMRSPortMultiTRP-CombinedTableIndicationInDCI is used to inform the UE that a multi-TRP combo table is enabled, which is used to point to existing DMRS port indication tables. As shown in FIG. 14, a parameter such as TCISTateMultiTRP-CombinedTableIndicationInDCI can be applied to inform the UE that a multi-TRP combination table is allowed, which is used to indicate TCI states (which may be defined in the TCI state indication table for a single TRP).

It should be noted that the corresponding enable parameter does not carry the actual content or information about the corresponding combination table - it is simply an indication of the permission to use the combination table. The actual contents of the combination table may, for example, be included in the PDSCH-Config information element as described above.

However, there are other methods for notifying the UE that the combination table exists or is allowed to use the combination table. For example, similar to the implementations described in the previous section, the UE-specific RNTI may be reconfigured to indicate the resolution of the combination table, or the existing RNTI may be enhanced with additional functionality. If a DCI CRC is scrambled with this RNTI, then the UE assumes that a pattern table is in use and that the bit field in the DCI for parameter X points to the index of that pattern table.

Accordingly, the UE circuit 530 descrambles the CRC attached to the DCI during operation using an RNTI that is included in or can be derived from the configuration, the RNTI indicating that a plurality of transmissions or receptions are to be performed based on a set of mappings (e.g., a table combinations), and determines, based on the result of successful descrambling of the CRC attached to the DCI using the RNTI, that a plurality of transmissions or receptions should be performed based on the set of mappings.

In addition, the RNTI functionality described in this section can be combined with the RNTI functionality described in the previous section covering the RNTI-based approach. For example, the set of potential RNTI candidates are consecutive integers that are used to perform successive descrambling attempts by the UE rather than to a single TCI status indication table.

The following is an example of DMRS port indication signaling using a combination table. Table 9 is a DMRS port indication table for a type 1 configuration with 1 character length. The table contains 16 indexes. If a combination table, such as table 10, is configured and enabled for DMRS port indication, then instead of directly signaling the DMRS port indication table index, 4 bits (i.e., a four-bit DCI field for DMRS port indication) are used to indicate the combination table index located on the right, which points to the DMRS port indication table for 2 TRPs. Exact combinations, number of indices, etc. can be configured via RRC depending on the scenario. Furthermore, it should be noted that Table 10 simply illustrates an example of the structure of a combination table, and these values do not necessarily apply to Table 9. Rather, the entries are to be understood as placeholders.

In addition, as mentioned, a combination table may be used to signal the TCI state for a plurality of TRPs. Table 11 shows an indication table that can be used for up to eight TCI states. An existing TCI bitfield of 3 bits may indicate one of the eight configured table 11 states for one TRP if the TCI state combination table is not enabled. However, if a TCI state combination table, such as table 12, is enabled, then instead of directly signaling the TCI state index, the 3 bits in the DCI are used to indicate the combination table index (table 12) that indicates the TCI states for 2 TRPs (e.g., two separate states from table 11). The exact combinations (as well as which of the total number of statically configured TCI states should be activated), number of indexes, etc. can be configured via RRC depending on the scenario.

The present invention may be implemented in software, hardware, or software and hardware. Each functional block used in the description of each embodiment set forth above may be partially or wholly implemented by an LSI (LSI) such as an integrated circuit, and each process described in each embodiment may be controlled partially or wholly by the same LSI or combination LSI. LSI can be formed separately in the form of crystals, or a single crystal can be formed to contain part or all of the functional blocks. The LSI may have a data input and output connected to it. In this document, the LSI may be referred to as IC (IC), system LSI, super-LSI or ultra-LSI, depending on the differences in the degree of integration. However, the implementation method of the integrated circuit is not limited to LSIs, and may be implemented using a dedicated circuit, a general purpose processor, or a special purpose processor. In addition, an FPGA (Field Programmable Gate Array) can be used, which can be programmed after the LSI is manufactured or configured to change the processor configuration, in which the connection configuration and settings of the circuit cells located inside the LSI can be changed. The present invention may be implemented as digital processing or analog processing. If future integrated circuit technology replaces LSIs as a result of the development of semiconductor technology or other derivative technology, functional blocks can be integrated using future integrated circuit technology. Biotechnology may also be applied.

The present invention can be implemented by any kind of device, device or system having a communication function, which are called communication devices.

Non-limiting examples of such communication devices include a telephone (e.g., cellular phone, smartphone), tablet, personal computer (PC) (e.g., laptop, desktop computer, netbook), camera (e.g., digital camera/camcorder), digital player (digital audio/video player), wearable device (e.g. wearable camera, smart watch, tracking device), game console, digital e-book reader, healthcare/medical teleservices (remote healthcare and medicine) and a vehicle providing communication functionality (e.g. car, airplane, ship) and various combinations thereof.

The communication device is not limited to portable or mobile devices, and may also include any kind of device, device, or system that is non-portable or stationary, such as a smart home device (e.g., household electrical appliance, lighting, smart meter, control panel), vending machine, and any other “things” in the Internet of Things (IoT) network.

Communication may include data exchange, for example, via a cellular system, a wireless LAN system, a satellite system, and so on. and their various combinations.

The communication device may include a device, such as a controller or sensor, which is connected to the communication device that performs the communication function described in the present invention. For example, the communication device may include a controller or sensor that generates control signals or data signals used by the communication device to perform the communication function of the communication device.

Communication devices may also include an infrastructure facility such as a base station, access point, and any other instrument, device, or system that communicates with or controls devices, such as the devices in the non-limiting examples above.

The present invention provides a user equipment (UE) comprising a transceiver that, during operation, receives downlink control information (DCI) over a physical downlink control channel (PDCCH) for scheduling a plurality of transmissions or receptions between a UE and a plurality of receiving and transmitting points. (TRP) over a plurality of channels, wherein the DCI comprises one or more indicators indicating one or more corresponding transmission parameters, and a circuit that, during operation, obtains, based on one or more indicators and a configuration, a plurality of values, respectively, of one or more transmission parameters, wherein the transceiver during operation performs a plurality of transmissions or receptions using a corresponding one of the plurality of values of one or more transmission parameters for each of the plurality of transmissions or receptions.

In some embodiments, the one or more transmission parameters comprise at least one of a demodulation reference signal (DMRS), a port indication, and a transmission configuration indication (TCI) state.

In some implementations, the configuration contains a Radio Network Temporary Identifier (RNTI), or the RNTI can be de-configured and the UE circuitry descrambles the CRC attached to the DCI using the RNTI during operation, the RNTI indicating the value of at least one set of transmission parameter values, either by itself or in combination with one of the indicators in DCI signaling.

In some implementations, the configuration comprises a first DMRS port indication table and a second DMRS port indication table, and the circuit descrambles the cyclic redundancy check (CRC) attached to the DCI during operation using a Radio Network Temporary Identifier (RNTI) that is included in the configuration or may be derived from it, wherein the RNTI indicates that the second DMRS port indication table is to be used for at least one of the plurality of transmissions or receptions, and the transceiver, during operation, performs, in accordance with the result of successful CRC descrambling using the RNTI, at least at least one of a plurality of transmissions or receptions using the second DMRS port indication table, wherein the indicator indicates the DMRS port indication from the second DMRS port indication table.

For example, the indicator indicates the first value of a set of TCI state values, the RNTI is one of K RNTI candidates, where the first of the K RNTI candidates is included in the configuration, and the RNTI candidates are K successive integers respectively indicating the K configured of TCI states signaled by radio resource control (RRC), and the circuit during operation determines the first value of the TCI state based on the indicator and obtains the second value from the set of TCI state values based on the result of successful descrambling of the CRC attached to the DCI, using as the RNTI potentially an RNTI candidate indicating the TCI state to be used as the second value of the K TCI states.

For example, the indicator indicates the first value of a set of TCI status values, and the circuit, during operation, descrambles the cyclic redundancy check (CRC) attached to the DCI using a radio network temporary identifier (RNTI) that is contained in or can be derived from the configuration, The RNTI is one of K RNTI candidates, where the first of the K RNTI candidates is included in the configuration, and the RNTI candidates are K successive integers, respectively indicating the K configured TCI states signaled by the RRC, and the circuit during operation determines a first TCI state value based on the indicator, and obtains a second value from the set of TCI state values based on the result of successful descrambling of the CRC attached to the DCI using as the RNTI a candidate RNTI indicating the TCI state to be used as the second th value from the K TCI states.

In accordance with some embodiments, at least one of the indicator and the RNTI indicates a TCI state for a plurality of TRPs, wherein the TCI state for a plurality of TRPs comprises more than one TCI state for transmitting more than one TRP or receiving from more than one TRP, respectively.

In some implementations, the configuration comprises a set of mappings between TRP sets and sets of candidate values of one or more transmission parameters, and at least one of the one or more indicators indicates, from among the mapping set, a mapping between one of the TRP sets to be used as the TRP set. , and one of the sets of potential values to be used as the set of values of one or more transmission parameters to be used for the set of transmissions or receptions.

In some embodiments, the mapping set contains M mappings from among N statically configured mappings, where M is equal to or less than N, and the transceiver receives M indices in operation, respectively, indicating the M mappings that are signaled by RRC, and at least one indicator indicates the index , which indicates a mapping between a set of TRPs and a set of values of one or more transmission parameters to be used for a set of transmissions or receptions.

In some implementations, the transceiver, during operation, receives the contents of a mapping table that defines a set of mappings, wherein the contents of the mapping table are signaled by RRC.

For example, the transceiver during operation receives an enable parameter that indicates that a plurality of transmissions or receptions should be performed based on a set of mappings, and which is signaled by RRC, and the circuit during operation determines, based on the enable parameter, that a plurality of transmissions or receptions should be performed on the basis of a set of comparisons.

For example, the scheme during operation descrambles the cyclic redundancy check (CRC) attached to the DCI using a Radio Network Temporary Identifier (RNTI) that is included in or derivable from the configuration, the RNTI indicating that a plurality of transmissions or receptions should be performed based on the matching set, and determines, based on the result of successful descrambling of the CRC attached to the DCI using the RNTI, that a plurality of transmissions or receptions should be performed based on the matching set.

In some implementations, the transceiver receives a signal containing RRC during operation.

The present invention also provides a network node comprising a circuit that, during operation, determines a plurality of values, respectively, of one or more transmission parameters for a plurality of transmissions and receptions between a plurality of transmission and reception points (TRP) and a user equipment (UE) over a plurality of channels, and generates information downlink control (DCI) for scheduling a plurality of transmissions or receptions, wherein the DCI comprises one or more indicators indicating one or more corresponding transmission parameters, wherein one or more indicators in combination with the configuration indicate a plurality of values, respectively, of one or more transmission parameters, and a transceiver that transmits DCI on a physical downlink control channel (PDCCH) during operation.

For example, the transceiver during operation performs at least one of a plurality of transmissions or receptions using a corresponding one of a plurality of values of one or more transmission parameters for each of the plurality of transmissions or receptions.

In some embodiments, the one or more transmission parameters comprise at least one of a demodulation reference signal (DMRS), a port indication, and a transmission configuration indication (TCI) state.

In some implementations, the configuration contains a Radio Network Temporary Identifier (RNTI), or the RNTI can be derived from the configuration, and the network node circuitry scrambles the CRC attached to the DCI using the RNTI during operation, the RNTI indicating the value of at least one of a plurality of parameter values transmission, either by itself or in combination with one of the indicators in DCI signaling.

In some implementations, the configuration comprises a first DMRS port indication table and a second DMRS port indication table, and the circuitry during operation scrambles a cyclic redundancy check (CRC) attached to the DCI using a Radio Network Temporary Identifier (RNTI) that is included in the configuration or may be derived from it, wherein the RNTI indicates that the second DMRS port indication table is to be used for at least one of the plurality of transmissions or receptions.

In some embodiments, the indicator indicates the first value of a set of TCI state values, the RNTI is one of K RNTI candidates, where the first of the K RNTI candidates is included in the configuration, and the RNTI candidates are K successive integers respectively indicating To configured TCI states signaled by radio resource control (RRC).

In accordance with some embodiments, at least one of the indicator and the RNTI indicates a TCI state for a plurality of TRPs, wherein the TCI state for a plurality of TRPs comprises more than one TCI state for transmitting more than one TRP or receiving from more than one TRP, respectively.

In some implementations, the configuration comprises a set of mappings between TRP sets and sets of candidate values of one or more transmission parameters, and at least one of the one or more indicators indicates, from among the mapping set, a mapping between one of the TRP sets to be used as the TRP set. , and one of the sets of potential values to be used as the set of values of one or more transmission parameters to be used for the set of transmissions or receptions.

In some embodiments, the mapping set contains M mappings from among N statically configured mappings, where M is equal to or less than N, and the transceiver during operation transmits M indices, respectively, indicating M mappings, which are signaled by the transceiver via RRC, and at least one the indicator indicates an index that indicates a mapping between the set of TRPs and the set of values of one or more transmission parameters to be used for the set of transmissions or receptions.

In some implementations, the transceiver during operation transmits the contents of a mapping table that defines a set of mappings, wherein the contents of the mapping table are signaled by RRC.

For example, the transceiver during operation transmits an enable parameter that indicates that a plurality of transmissions or receptions should be performed based on a set of mappings, and which is signaled by RRC.

For example, the scheme during operation scrambles the cyclic redundancy check (CRC) attached to the DCI using the temporary radio network identifier RNTI, which is included in the configuration or can be derived from it, with the RNTI indicating that a plurality of transmissions or receptions should be performed on based on a set of comparisons.

In some implementations, the transceiver transmits a signal containing RRC during operation.

The present invention provides a communication method for a user equipment including receiving, on a physical downlink control channel (PDCCH), downlink control information (DCI) for scheduling a plurality of transmissions or receptions between a UE and a plurality of receiving and transmitting points (TRPs) over a plurality of channels. , wherein the DCI comprises one or more indicators indicating one or more corresponding transmission parameters, deriving, based on one or more indicators and configuration, a plurality of values of one or more transmission parameters, respectively, and performing a plurality of transmissions or receptions using a corresponding one of the plurality of values of one or more transmission parameters for each of the plurality of transmissions or receptions.

In some embodiments, the one or more transmission parameters comprise at least one of a demodulation reference signal (DMRS), a port indication, and a transmission configuration indication (TCI) state.

In some embodiments, the configuration comprises a Radio Network Temporary Identifier (RNTI), or the RNTI can be derived from the configuration, and the method includes descrambling the CRC attached to the DCI using the RNTI, the RNTI indicating a value of at least one set of transmission parameter values, or itself by itself, or in combination with one of the indicators in DCI signaling.

In some implementations, the configuration comprises a first DMRS port indication table and a second DMRS port indication table, and the method includes descrambling a cyclic redundancy check (CRC) attached to a DCI using a radio network temporary identifier (RNTI) that is included in the configuration or may be derived therefrom, wherein the RNTI indicates that the second DMRS port indication table is to be used for at least one of the plurality of transmissions or receptions, and performing, according to the result of successful CRC descrambling using the RNTI, at least one of the plurality of transmissions or receptions using the second DMRS port indication table, wherein the indicator indicates the DMRS port indication from the second DMRS port indication table.

For example, the indicator indicates the first value of a set of TCI state values, the RNTI is one of K RNTI candidates, where the first of the K RNTI candidates is included in the configuration, and the RNTI candidates are K successive integers respectively indicating the K configured of TCI states signaled by radio resource control (RRC), and the method includes descrambling a first TCI state value based on the indicator, and deriving a second value from a plurality of TCI state values based on a successful descrambling result of a CRC attached to a DCI, using candidate candidate as the RNTI RNTI indicated by the TCI state to be used as the second value of the K TCI states.

For example, the indicator indicates the first value of a plurality of TCI status values, and the method includes descrambling the cyclic redundancy check (CRC) attached to the DCI using a radio network temporary identifier (RNTI) that is contained in or can be derived from the configuration, the RNTI is one of K RNTI candidates, wherein the first of the K RNTI candidates is included in the configuration, and the RNTI candidates are K successive integers respectively indicating the K configured TCI states signaled by the RRC, and the method includes determining the first TCI state value based on the indicator and deriving a second value from the set of TCI state values based on the result of successful descrambling of the CRC attached to the DCI, using as the RNTI the RNTI candidate indicated by the TCI state to be used as the the second value from the K TCI states.

In accordance with some embodiments, at least one of the indicator and the RNTI indicates a TCI state for a plurality of TRPs, wherein the TCI state for a plurality of TRPs comprises more than one TCI state for transmitting more than one TRP or receiving from more than one TRP, respectively.

In some implementations, the configuration comprises a set of mappings between TRP sets and sets of candidate values of one or more transmission parameters, and at least one of the one or more indicators indicates, from among the mapping set, a mapping between one of the TRP sets to be used as the TRP set. , and one of the sets of potential values to be used as the set of values of one or more transmission parameters to be used for the set of transmissions or receptions.

In some embodiments, the set of mappings contains M mappings from among N statically configured mappings, where M is equal to or less than N, and the method includes sending M indices, respectively, indicating M mappings that are signaled by RRC, and at least one indicator indicates an index that indicates a mapping between a set of TRPs and a set of values of one or more transmission parameters to be used for a set of transmissions or receptions.

In some embodiments, the method includes receiving the contents of a mapping table that defines a set of mappings, wherein the contents of the mapping table are signaled by RRC.

For example, the method includes receiving a grant parameter that indicates that a plurality of transmissions or receptions are to be performed based on the mapping set and signaled by RRC, and determining, based on the grant parameter, that the plurality of transmissions or receptions are to be performed based on the mapping set. .

For example, the method includes descrambling a cyclic redundancy check (CRC) attached to a DCI using a radio network temporary identifier (RNTI) that is included in or derivable from a configuration, the RNTI indicating that a plurality of transmissions or receptions are to be performed on based on the matching set, and determines, based on the result of successful descrambling of the CRC attached to the DCI using the RNTI, that a plurality of transmissions or receptions should be performed based on the matching set.

In some implementations, the method includes receiving a signal containing an RRC.

In addition, the present invention provides a communication method for a network node, including determining a plurality of values, respectively, of one or more transmission parameters for a plurality of transmissions and receptions between a plurality of transmission and reception points (TRP) and a user equipment (UE) over a plurality of channels, and generating control information downlink (DCI) for scheduling a plurality of transmissions or receptions, wherein the DCI comprises one or more indicators indicating one or more corresponding transmission parameters, wherein the one or more indicators in combination with the configuration indicate a plurality of values, respectively, of one or more transmission parameters, and DCI transmission on the Physical Downlink Control Channel (PDCCH).

For example, the method includes performing at least one of a plurality of transmissions or receptions using a corresponding one of a plurality of values of one or more transmission parameters for each of the plurality of transmissions or receptions.

In some embodiments, the one or more transmission parameters comprise at least one of a demodulation reference signal (DMRS), a port indication, and a transmission configuration indication (TCI) state.

In some implementations, the configuration comprises a Radio Network Temporary Identifier (RNTI), or the RNTI can be derived from the configuration, and the method includes scrambling the CRC attached to the DCI using the RNTI, the RNTI indicating the value of at least one set of transmission parameter values, or itself itself, or in combination with one of the indicators in the DCI signaling.

In some implementations, the configuration comprises a first DMRS port indication table and a second DMRS port indication table, and the method includes scrambling a cyclic redundancy check (CRC) attached to a DCI using a radio network temporary identifier (RNTI) that is included in the configuration or may be derived from it, with the RNTI indicating that the second DMRS port indication table is to be used for at least one of the plurality of transmissions or receptions.

In some embodiments, the indicator indicates the first value of a set of TCI state values, the RNTI is one of K RNTI candidates, where the first of the K RNTI candidates is included in the configuration, and the RNTI candidates are K successive integers respectively indicating To configured TCI states signaled by radio resource control (RRC).

In accordance with some embodiments, at least one of the indicator and the RNTI indicates a TCI state for a plurality of TRPs, wherein the TCI state for a plurality of TRPs comprises more than one TCI state for transmitting more than one TRP or receiving from more than one TRP, respectively.

In some implementations, the configuration comprises a set of mappings between TRP sets and sets of candidate values of one or more transmission parameters, and at least one of the one or more indicators indicates, from among the mapping set, a mapping between one of the TRP sets to be used as the TRP set. , and one of the sets of potential values to be used as the set of values of one or more transmission parameters to be used for the set of transmissions or receptions.

In some embodiments, the mapping set comprises M mappings from among N statically configured mappings, where M is equal to or less than N, and the method includes receiving M indices respectively indicating the M mappings that are signaled by the transceivers via RRC, and at least one indicator indicates an index that indicates a mapping between the set of TRPs and the set of values of one or more transmission parameters to be used for the set of transmissions or receptions.

In some embodiments, the method includes transmitting the contents of a mapping table that defines a set of mappings, wherein the contents of the mapping table are signaled by RRC.

For example, the method includes transmitting an enable parameter that indicates that a plurality of transmissions or receptions are to be performed based on a set of mappings, and that is signaled by RRC.

For example, the method includes scrambling a cyclic redundancy check (CRC) attached to a DCI using a temporary radio network identifier RNTI that is included in or derivable from a configuration, the RNTI indicating that a plurality of transmissions or receptions are to be performed based on a set comparisons.

In some implementations, the method includes transmitting a signal containing RRC.

In summary, the present invention relates to a user equipment (UE), a network node, and communication methods for a UE and a network node, respectively. The UE includes a transceiver that, during operation, receives downlink control information (DCI) over a physical downlink control channel (PDCCH) for scheduling a plurality of transmissions or receptions between the UE and a plurality of receiving and transmitting points (TRPs) over a plurality of channels, wherein the DCI contains one or more indicators indicating one or more corresponding transmission parameters, and a circuit that, during operation, obtains, based on one or more indicators and a configuration, a set of values, respectively, of one or more transmission parameters. The transceiver during operation performs a plurality of transmissions or receptions using a corresponding one of a plurality of values of one or more transmission parameters for each of the plurality of transmissions or receptions.

Claims (57)

1. User equipment, UE, comprising: a transceiver that, during operation, is configured to receive on a physical downlink control channel, PDCCH, downlink control information, DCI, wherein the DCI comprises one or more indicators related to one or more transmission parameters, and a transmission configuration indication field, TCI; and a circuit that, during operation, is configured to determine, based on one or more indicators and based on the configuration indicated by the TCI field, one or more transmission parameters; and the transceiver during operation is configured to perform transmissions or receptions using one or more transmission parameters for said transmissions or receptions, one or more transmission parameters are determined using the first table in case the configuration indicated by the TCI field indicates one case, and one or more transmission parameters are determined using the second table in case the configuration indicated by the TCI field indicates multiple cases. 2. The user equipment of claim 1, wherein the one or more transmission parameters comprise a demodulation reference signal, DMRS, antenna port value. 3. The user equipment according to claim. 1, in which the number of entries to be used in the second table is greater than their number in the first table. 4. The user equipment of claim 1, wherein each entry that is changed or added to the second table points to a plurality of DMRS antenna port values. 5. The user equipment according to claim 1, wherein the values corresponding to some entries in the first table are even included in the second table. 6. The user equipment of claim 1, wherein some values of the TCI field indicate a single occurrence and other values of the TCI field indicate multiple occurrences. 7. Communication method implemented by the user equipment, UE, including: receiving on a physical downlink control channel, PDCCH, downlink control information, DCI, wherein the DCI comprises one or more indicators related to one or more transmission parameters and a transmission configuration indication field, TCI; and determining, based on one or more indicators and the configuration indicated by the TCI field, one or more transmission parameters, and performing transmissions or receptions using one or more transmission parameters for said transmissions or receptions, moreover, one or more transmission parameters are determined using the first table in case the configuration indicated by the TCI field indicates one case, and one or more transmission parameters are determined using the second table in case the configuration indicated by the TCI field indicates multiple cases. 8. The communication method of claim 7, wherein the one or more transmission parameters comprise a demodulation reference signal, DMRS, antenna port value. 9. The communication method according to claim 7, wherein the number of entries to be used in the second table is greater than their number in the first table. 10. The communication method of claim 7, wherein each entry that is changed or added to the second table points to a plurality of DMRS antenna port values. 11. The communication method according to claim 7, wherein the values corresponding to some entries in the first table are even included in the second table. 12. The communication method of claim 7, wherein some values of the TCI field indicate a single occurrence and other values of the TCI field indicate multiple occurrences. 13. Network node containing: a circuit that, during operation, is configured to determine one or more transmission parameters, wherein the one or more transmission parameters are indicated to the user equipment, the UE, by one or more indicators related to the one or more transmission parameters and a TCI field configuration; a transceiver that, during operation, is configured to perform data transmissions using one or more transmission parameters and transmissions of downlink control information, DCI, on a physical downlink control channel, PDCCH, wherein the DCI comprises one or more indicators and a TCI field, and one or more transmission parameters are determined using the first table in case the configuration indicated by the TCI field indicates one case, and one or more transmission parameters are determined using the second table in case the configuration indicated by the TCI field indicates multiple cases. 14. The network node of claim 13, wherein the one or more transmission parameters comprise a demodulation reference signal, DMRS, antenna port value. 15. The network node of claim 13, wherein the number of entries to be used in the second table is greater than their number in the first table. 16. The network node of claim 13, wherein each entry that is changed or added for the second table points to a set of DMRS antenna port values. 17. The network node of claim 13, wherein the values corresponding to some entries in the first table are even included in the second table. 18. The network node of claim 13, wherein some values of the TCI field indicate a single occurrence and other values of the TCI field indicate multiple occurrences. 19. The method of communication carried out by the network node, including: determining one or more transmission parameters; wherein the one or more transmission parameters are indicated to the user equipment, the UE, by one or more indicators related to the one or more transmission parameters and the configuration of the TCI field, performing data transmissions using one or more transmission parameters and transmissions of downlink control information, DCI, on a physical downlink control channel, PDCCH, wherein the DCI comprises one or more indicators and a TCI field, wherein one or more transmission parameters are determined using the first table in case the configuration indicated by the TCI field indicates one case, and one or more transmission parameters are determined using the second table in case the configuration indicated by the TCI field indicates multiple cases. 20. The communication method of claim 19, wherein the one or more transmission parameters comprise a demodulation reference signal, DMRS, antenna port value. 21. The communication method according to claim 19, wherein the number of entries to be used in the second table is greater than their number in the first table. 22. The communication method of claim 19, wherein each entry that is changed or added to the second table points to a plurality of DMRS antenna port values. 23. The communication method according to claim 19, wherein the values corresponding to some entries in the first table are even included in the second table. 24. The communication method of claim 19, wherein some values of the TCI field indicate a single occurrence and other values of the TCI field indicate multiple occurrences. 25. An integrated circuit for use in a user equipment, UE, comprising: a transceiver circuit that, during operation, is configured to control the reception on a physical downlink control channel, PDCCH, downlink control information, DCI, wherein the DCI comprises one or more indicators related to one or more transmission parameters, and a configuration indication field transmission, TCI; and a determination circuit that, during operation, is configured to determine, based on one or more indicators and based on the configuration indicated by the TCI field, one or more transmission parameters; and the transceiver circuit during operation is configured to control the implementation of transmissions or receptions using one or more transmission parameters for said transmissions or receptions, one or more transmission parameters are determined using the first table in case the configuration indicated by the TCI field indicates one case, and one or more transmission parameters are determined using the second table in case the configuration indicated by the TCI field indicates multiple cases. 26. An integrated circuit for use in a network node, containing: definition scheme, which during operation is made with the ability to control: determining one or more transmission parameters; wherein the one or more transmission parameters are indicated to the user equipment, the UE, by one or more indicators related to the one or more transmission parameters and the configuration of the TCI field, a transmission scheme configured to carry out data transmissions using one or more transmission parameters and transmissions of downlink control information, DCI, on a physical downlink control channel, PDCCH, wherein the DCI comprises one or more indicators and a TCI field, wherein one or more transmission parameters are determined using the first table in case the configuration indicated by the TCI field indicates one case, and one or more transmission parameters are determined using the second table in case the configuration indicated by the TCI field indicates multiple cases.

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