EP4666622A1

EP4666622A1 - Devices and methods for communication

Info

Publication number: EP4666622A1
Application number: EP23921891.0A
Authority: EP
Inventors: Yukai GAO; Gang Wang; Peng Guan
Original assignee: NEC Corp
Current assignee: NEC Corp
Priority date: 2023-02-16
Filing date: 2023-02-16
Publication date: 2025-12-24
Also published as: WO2024168737A1; JP2026507589A

Abstract

Embodiments of the present disclosure provide a solution for STxMP. In a solution, a terminal device receives, from a network device, configuration information for uplink transmissions associated with first and second SRS resource sets, the configuration information indicating: a first and second parameter sets to be used for the uplink transmissions, a first indication indicating a simultaneous transmission scheme of the uplink transmissions, and a mapping information; determine, based at least in part on the first indication and the mapping information, the first and second parameter set associated with the first and second SRS resource sets, respectively; and perform the uplink transmissions, based on the first and second parameter sets.

Description

DEVICES AND METHODS FOR COMMUNICATION

FIELDS
Example embodiments of the present disclosure generally relate to the field of communication techniques and in particular, to devices and methods for simultaneous transmission over multi-panels (STxMP) .

BACKGROUND

Previously, a physical uplink shared channel (PUSCH) may be assigned with a priority, and a terminal device (for example, user equipment, UE) does not expect to transmit a PUSCH on a given serving cell overlapping in time with a transmission occasion of another PUSCH. In other words, simultaneous transmission of PUSCHs was not supported at a legacy terminal device. Currently, it has been agreed that STxMP is supported for PUSCHs. Therefore, collision handing between the at least partially overlapped PUSCHs needs to be enhanced.
SUMMARY
In general, embodiments of the present disclosure provide methods, devices and computer storage medium for STxMP.
In a first aspect, there is provided a terminal device comprising: a processor configured to cause the terminal device to: receive, from a network device, configuration information for uplink transmissions associated with a first sounding reference signal (SRS) resource set and a second SRS resource set, the configuration information indicating: a first parameter set and a second parameter set to be used for the uplink transmissions, a first indication indicating a simultaneous transmission scheme of the uplink transmissions, and a mapping information indicating at least one of the following: correspondence between the first and second parameter sets and the first and second SRS resource sets, or a combination of the number of layers associated with the first and second parameter sets; determine, based at least in part on the first indication and the mapping information, the first and second parameter set associated with the first and second SRS resource sets, respectively; and perform, based on the first and second parameter sets, the uplink transmissions with a network device.
In a second aspect, there is provided a terminal device comprising: a processor configured to cause the terminal device to: receive, from a network device, configuration information indicating: a first configuration of a first uplink transmission, the first configuration indicating a first parameter set, a second configuration of a second uplink transmission, the second configuration indicating a second parameter set determined based at least in part on the first parameter set, the second uplink transmission being at least partly overlapped with the first uplink transmission during a duration; and perform, based on the first and second parameter sets, the first and second uplink transmissions simultaneously during the duration.
In a third aspect, there is provided a terminal device comprising: a processor configured to cause the terminal device to: receive, from a network device, first configuration information for a first uplink transmission, the first uplink transmission being associated with a first timing advance group (TAG) ; receive, from the network device, second configuration information for a second uplink transmission, the second uplink transmission being associated with a second TAG, wherein the second uplink transmission is not overlapped with the first uplink transmission in a first duration, the first duration being associated with: a second duration of the first uplink transmission, and a third duration associated with a first difference between the first TAG and the second TAG; and perform, with the network device, the first and second uplink transmissions based at least in part on the first and second configuration information, respectively.
In a fourth aspect, there is provided a network device comprising: a processor configured to cause the network device to: transmit, to a terminal device, configuration information for uplink transmissions associated with a first sounding reference signal (SRS) resource set and a second SRS resource set, the configuration information indicating: a first parameter set and a second parameter set to be used for the uplink transmissions, a first indication indicating a simultaneous transmission scheme of the uplink transmissions, and a mapping information indicating at least one of the following: correspondence between the first and second parameter sets and the first and second SRS resource sets, or a combination of the number of layers associated with the first and second parameter sets; and receive the uplink transmissions from the terminal device.
In a fifth aspect, there is provided a network device comprising: a processor configured to cause the network device to: transmit, to a terminal device, configuration information indicating: a first configuration of a first uplink transmission, the first configuration indicating a first parameter set during a duration, a second configuration of a second uplink transmission, the second configuration indicating a second parameter set determined based at least in part on the first parameter set, the second uplink transmission being at least partly overlapped with the first uplink transmission during the duration; and receive the first and second uplink transmissions simultaneously.
In a sixth aspect, there is provided a network device comprising: a processor configured to cause the network device to: transmit, to a terminal device, first configuration information for a first uplink transmission, the first uplink transmission being associated with a first timing advance group (TAG) ; transmit, to the terminal device, second configuration information for a second uplink transmission, the second uplink transmission being associated with a second TAG, wherein the second uplink transmission is not overlapped with the first uplink transmission in a first duration, the first duration being associated with: a second duration of the first uplink transmission, and a third duration associated with a first difference between the first TAG and the second TAG; and receive, from the terminal device, the first and second uplink transmissions based at least in part on the first and second configuration information, respectively.
In a seventh aspect, there is provided a communication method performed by a terminal device. The method comprises: receiving, from a network device, configuration information for uplink transmissions associated with a first sounding reference signal (SRS) resource set and a second SRS resource set, the configuration information indicating: a first parameter set and a second parameter set to be used for the uplink transmissions, a first indication indicating a simultaneous transmission scheme of the uplink transmissions, and a mapping information indicating at least one of the following: correspondence between the first and second parameter sets and the first and second SRS resource sets, or a combination of the number of layers associated with the first and second parameter sets; determine, based at least in part on the first indication and the mapping information, the first and second parameter set associated with the first and second SRS resource sets, respectively; and performing, based on the first and second parameter sets, the uplink transmissions with a network device.
In an eighth aspect, there is provided a communication method performed by a terminal device. The method comprises: receiving, from a network device, configuration information indicating: a first configuration of a first uplink transmission, the first configuration indicating a first parameter set, a second configuration of a second uplink transmission, the second configuration indicating a second parameter set determined based at least in part on the first parameter set, the second uplink transmission being at least partly overlapped with the first uplink transmission during a duration; and performing, based on the first and second parameter sets, the first and second uplink transmissions simultaneously during the duration.
In a ninth aspect, there is provided a communication method performed by a terminal device. The method comprises: receiving, from a network device, first configuration information for a first uplink transmission, the first uplink transmission being associated with a first timing advance group (TAG) ; receiving, from the network device, second configuration information for a second uplink transmission, the second uplink transmission being associated with a second TAG, wherein the second uplink transmission is not overlapped with the first uplink transmission in a first duration, the first duration being associated with: a second duration of the first uplink transmission, and a third duration associated with a first difference between the first TAG and the second TAG; and performing, with the network device, the first and second uplink transmissions based at least in part on the first and second configuration information, respectively.
In a tenth aspect, there is provided a communication method performed by a network device. The method comprises: transmitting, to a terminal device, configuration information for uplink transmissions associated with a first sounding reference signal (SRS) resource set and a second SRS resource set, the configuration information indicating: a first parameter set and a second parameter set to be used for the uplink transmissions, a first indication indicating a simultaneous transmission scheme of the uplink transmissions, and a mapping information indicating at least one of the following: correspondence between the first and second parameter sets and the first and second SRS resource sets, or a combination of the number of layers associated with the first and second parameter sets; and receiving the uplink transmissions from the terminal device.
In an eleventh aspect, there is provided a communication method performed by a network device. The method comprises: transmitting, to a terminal device, configuration information indicating: a first configuration of a first uplink transmission, the first configuration indicating a first parameter set during a duration, a second configuration of a second uplink transmission, the second configuration indicating a second parameter set determined based at least in part on the first parameter set, the second uplink transmission being at least partly overlapped with the first uplink transmission during the duration; and receiving the first and second uplink transmissions simultaneously.
In a twelfth aspect, there is provided a communication method performed by a network device. The method comprises: transmitting, to a terminal device, first configuration information for a first uplink transmission, the first uplink transmission being associated with a first timing advance group (TAG) ; transmitting, to the terminal device, second configuration information for a second uplink transmission, the second uplink transmission being associated with a second TAG, wherein the second uplink transmission is not overlapped with the first uplink transmission in a first duration, the first duration being associated with: a second duration of the first uplink transmission, and a third duration associated with a first difference between the first TAG and the second TAG; and receiving, from the terminal device, the first and second uplink transmissions based at least in part on the first and second configuration information, respectively.
In a thirteenth aspect, there is provided a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to carry out the method according to the first, second, third, fourth, fifth, or sixth aspect.
Other features of the present disclosure will become easily comprehensible through the following description.

BRIEF DESCRIPTION OF THE DRAWINGS

Through the more detailed description of some example embodiments of the present disclosure in the accompanying drawings, the above and other objects, features and advantages of the present disclosure will become more apparent, wherein:
FIG. 1 illustrates an example communication environment in which example embodiments of the present disclosure can be implemented;
FIG. 2A illustrates a schematic diagram for a space division multiplexing (SDM) scheme in accordance with some embodiments of the present disclosure;
FIG. 2B illustrates a schematic diagram for a single frequency network (SFN) scheme in accordance with some embodiments of the present disclosure;
FIG. 3 illustrates a signaling flow of configurations and indications for STxMP in accordance with some embodiments of the present disclosure;
FIG. 4A illustrates an example look-up table for a second sounding reference signal resource indicator (SRI) in accordance with some embodiments of the present disclosure;
FIG. 4B illustrates an example look-up table for a second transmit precoding matrix index (TPMI) in accordance with some embodiments of the present disclosure;
FIG. 5 illustrates a signaling flow of collision handling STxMP in accordance with some embodiments of the present disclosure;
FIG. 6 illustrates an example scenario where a first uplink transmission is associated with a first transmission reception point (TRP) and a second uplink transmission is associated with a second TRP;
FIG. 7 illustrates an example scenario where a first uplink transmission is associated with a first TRP and a second uplink transmission is associated with a multi-TRP operation;
FIG. 8 illustrates an example scenario where a first uplink transmission is associated with a multi-TRP operation and a second uplink transmission is associated with a multi-TRP operation;
FIG. 9 illustrates a signaling flow of handling in the case of different timing advances (TAs) in accordance with some embodiments of the present disclosure;
FIG. 10A illustrates a schematic diagram of timing of uplink transmissions without considering the TA difference in accordance with some embodiments of the present disclosure;
FIG. 10B illustrates a schematic diagram of timing of uplink transmissions considering the TA difference in accordance with some embodiments of the present disclosure;
FIG. 11 illustrates a flowchart of a method implemented at a terminal device according to some example embodiments of the present disclosure;
FIG. 12 illustrates a flowchart of a method implemented at a terminal device according to some example embodiments of the present disclosure;
FIG. 13 illustrates a flowchart of a method implemented at a terminal device according to some example embodiments of the present disclosure;
FIG. 14 illustrates a flowchart of a method implemented at a network device according to some example embodiments of the present disclosure;
FIG. 15 illustrates a flowchart of a method implemented at a network device according to some example embodiments of the present disclosure;
FIG. 16 illustrates a flowchart of a method implemented at a network device according to some example embodiments of the present disclosure; and
FIG. 17 illustrates a simplified block diagram of an apparatus that is suitable for implementing example embodiments of the present disclosure.
Throughout the drawings, the same or similar reference numerals represent the same or similar element.

DETAILED DESCRIPTION

Principle of the present disclosure will now be described with reference to some example embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. Embodiments described herein can be implemented in various manners other than the ones described below.
In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skills in the art to which this disclosure belongs.
As used herein, the term ‘terminal device’ refers to any device having wireless or wired communication capabilities. Examples of the terminal device include, but not limited to, user equipment (UE) , personal computers, desktops, mobile phones, cellular phones, smart phones, personal digital assistants (PDAs) , portable computers, tablets, wearable devices, internet of things (IoT) devices, Ultra-reliable and Low Latency Communications (URLLC) devices, Internet of Everything (IoE) devices, machine type communication (MTC) devices, devices on vehicle for V2X communication where X means pedestrian, vehicle, or infrastructure/network, devices for Integrated Access and Backhaul (IAB) , Space borne vehicles or Air borne vehicles in Non-terrestrial networks (NTN) including Satellites and High Altitude Platforms (HAPs) encompassing Unmanned Aircraft Systems (UAS) , eXtended Reality (XR) devices including different types of realities such as Augmented Reality (AR) , Mixed Reality (MR) and Virtual Reality (VR) , the unmanned aerial vehicle (UAV) commonly known as a drone which is an aircraft without any human pilot, devices on high speed train (HST) , or image capture devices such as digital cameras, sensors, gaming devices, music storage and playback appliances, or Internet appliances enabling wireless or wired Internet access and browsing and the like. The ‘terminal device’ can further has ‘multicast/broadcast’ feature, to support public safety and mission critical, V2X applications, transparent IPv4/IPv6 multicast delivery, IPTV, smart TV, radio services, software delivery over wireless, group communications and IoT applications. It may also incorporate one or multiple Subscriber Identity Module (SIM) as known as Multi-SIM. The term “terminal device” can be used interchangeably with a UE, a mobile station, a subscriber station, a mobile terminal, a user terminal or a wireless device.
The term “network device” refers to a device which is capable of providing or hosting a cell or coverage where terminal devices can communicate. Examples of a network device include, but not limited to, a Node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a next generation NodeB (gNB) , a transmission reception point (TRP) , a remote radio unit (RRU) , a radio head (RH) , a remote radio head (RRH) , an IAB node, a low power node such as a femto node, a pico node, a reconfigurable intelligent surface (RIS) , and the like.
The terminal device or the network device may have Artificial intelligence (AI) or Machine learning capability. It generally includes a model which has been trained from numerous collected data for a specific function, and can be used to predict some information.
The terminal or the network device may work on several frequency ranges, e.g., FRI (e.g., 450 MHz to 6000 MHz) , FR2 (e.g., 24.25GHz to 52.6GHz) , frequency band larger than 100 GHz as well as Tera Hertz (THz) . It can further work on licensed/unlicensed/shared spectrum. The terminal device may have more than one connection with the network devices under Multi-Radio Dual Connectivity (MR-DC) application scenario. The terminal device or the network device can work on full duplex, flexible duplex and cross division duplex modes.
The embodiments of the present disclosure may be performed in test equipment, e.g., signal generator, signal analyzer, spectrum analyzer, network analyzer, test terminal device, test network device, channel emulator. In some embodiments, the terminal device may be connected with a first network device and a second network device. One of the first network device and the second network device may be a master node and the other one may be a secondary node. The first network device and the second network device may use different radio access technologies (RATs) . In some embodiments, the first network device may be a first RAT device and the second network device may be a second RAT device. In some embodiments, the first RAT device is eNB and the second RAT device is gNB. Information related with different RATs may be transmitted to the terminal device from at least one of the first network device or the second network device. In some embodiments, first information may be transmitted to the terminal device from the first network device and second information may be transmitted to the terminal device from the second network device directly or via the first network device. In some embodiments, information related with configuration for the terminal device configured by the second network device may be transmitted from the second network device via the first network device. Information related with reconfiguration for the terminal device configured by the second network device may be transmitted to the terminal device from the second network device directly or via the first network device.
As used herein, the singular forms ‘a’ , ‘an’ and ‘the’ are intended to include the plural forms as well, unless the context clearly indicates otherwise. The term ‘includes’ and its variants are to be read as open terms that mean ‘includes, but is not limited to. ’ The term ‘based on’ is to be read as ‘at least in part based on. ’ The term ‘one embodiment’ and ‘an embodiment’ are to be read as ‘at least one embodiment. ’ The term ‘another embodiment’ is to be read as ‘at least one other embodiment. ’ The terms ‘first, ’ ‘second, ’ and the like may refer to different or same objects. Other definitions, explicit and implicit, may be included below.
In some examples, values, procedures, or apparatus are referred to as ‘best, ’ ‘lowest, ’ ‘highest, ’ ‘minimum, ’ ‘maximum, ’ or the like. It will be appreciated that such descriptions are intended to indicate that a selection among many used functional alternatives can be made, and such selections need not be better, smaller, higher, or otherwise preferable to other selections.
As used herein, the term “resource, ” “transmission resource, ” “uplink resource, ” or “downlink resource” may refer to any resource for performing a communication, such as a resource in time domain, a resource in frequency domain, a resource in space domain, a resource in code domain, or any other resource enabling a communication, and the like. In the following, unless explicitly stated, a resource in both frequency domain and time domain will be used as an example of a transmission resource for describing some example embodiments of the present disclosure. It is noted that example embodiments of the present disclosure are equally applicable to other resources in other domains.
As used herein, the term “TRP” may refer to an antenna port or an antenna array (with one or more antenna elements) available to the network device located at a specific geographical location. For example, a network device may be coupled with multiple TRPs in different geographical locations to achieve better coverage. Alternatively, or in addition, multiple TRPs may be incorporated into a network device, or in other words, the network device may comprise the multiple TRPs. The term “TRP” may be also referred to as a cell, such as a macro-cell, a small cell, a pico-cell, a femto-cell, a remote radio head, a relay node, etc. It is to be understood that the term “TRP” may refer to a logical concept which may be physically implemented by various manner.
There may be no explicit TRP identification (ID) . If multi-downlink control information (M-DCI) is assumed, the TRP ID may be implicitly identified via control resource set (CORESET) Pool Index (CORESETPoolIndex) . If single-DCI (S-DCI) is assumed, the TRP ID may implicitly identified via sounding reference signal (SRS) resource set ID for uplink (UL) transmission at least. Therefore, the term “TRP” can be used interchangeably with the terms “CORESETPoolIndex” and SRS resource set.
In the case of M-DCI, a terminal device is configured by a higher layer parameter PDCCH-Config that contains two different values of CORESETPoolIndex in ControlResourceSet for the active bandwidth part (BWP) of a serving cell.
In the case of S-DCI, there is only one value of CORESETPoolIndex in ControlResourceSet.
UL-DCI is used for UL scheduling, e.g., DCI format 0_1 or 0_2. If UL-DCI is addressed to cell Radio Network Temporary Identity (C-RNTI) , the UL-DCI is used for dynamic grant (DG) . IfUL-DCI is addressed to configured scheduling-RNTI (CS-RNTI) , the UL-DCI is used type 2 configured grant (CG) .
BM-DCI is used for downlink (DL) transmission configuration indicator (TCI) update, e.g., DCI format 1_1 or 1_2, with or without DL assignment.
In example embodiments of the present disclosure, to support UL multi-TRP (MTRP) and STxMP, two SRS resource sets are configured. The two SRS resource sets may be configured for codebook (CB) and non-codebook (NCB) respectively, e.g., with usage set to ‘codebook' or ‘nonCodebook’ . The two SRS resource sets may be configured in information element (IE) srs-ResourceSetToAddModList and/or IE srs-ResourceSetToAddModListDCI-0-2. If both the above two IEs are configured, SRS resource set (s) configured in the IE srs-ResourceSetToAddModList may be used as the two SRS resource sets. In some embodiments, the first SRS resource set may be the SRS resource set with a lower resource set ID, unless specifically motioned.
In the case of two-timing advance (2-TA) and/or two-timing advance group (2-TAG) , two TAG IDs can be configured for one cell, and each TAG ID may be associated with a TA value.
As used herein, the terms “UE expects” , “UE does not expect, “terminal device expects” , “terminal device does not expect” may imply restrictions on a configuration of a network device (also referred to as NW configuration) . The terms “UE is not expected to” and “terminal device is not expected to” may imply a terminal implementation, also referred to as UE implementation. In some embodiments, the terms “UE does not expect” and “UE is not expected to” may be used equally.
As used herein, the terms “transmission capability information” , “UE capability information” , “capability-related information” , “capability value set” , “panel information” and “panel-related information” can be used interchangeably.
As used herein, the terms “precoder” , “precoding” , “precoding matrix” , “beam” , “spatial relation information” , “spatial relation info” , “precoding information” , “precoding information and number of layers” , “precoding matrix indicator (PMI) ” , “precoding matrix indicator” , “transmission precoding matrix indication” , “precoding matrix indication” , “transmission configuration indication state (TCI state) ” , “UL TCI state” , “joint TCI state” , “transmission configuration indicator” , “quasi co-location (QCL) ” , “quasi-co-location” , “QCL parameter” , “QCL assumption” , “QCL relationship” and “spatial relation” can be used interchangeably.
As used herein, the terms “TRP” , “TCI state” , “TCI” , “CORESET” , “CORESET pool” , “UL TCI state” , “joint TCI state” can be used interchangeably.
As used herein, the terms “multiple TRPs” , “multiple TCI states” , “multiple CORESETs” and “multiple control resource set pools” , “multi-TRP” , “multi-TCI state” , “multi-TCI” , “multi-CORESET” and “multi-control resource set pool” , “MTRP” and “M-TCI” , “M-TRP” can be used interchangeably.
The terms “resource (s) ” , “resource (s) in a resource set” , “resource set” can be used interchangeably.
The terms “group” , “subset” , “set” can be used interchangeably.
The term “BWP ID/index” can be used interchangeably with the terms “BWP/component carrier (CC) ID/index” , “CC identity/index” , “cell identity/index” , “physical cell identity/index” , “physical cell identity (PCI) ” , “physCellId” and “serving cell identity/index” .
The term “TCI state” can be used interchangeably with “TCI state ID” , “RS ID” , “QCL info” and “beam ID” .
The term “codepoint” can be used interchangeably with the terms “code value” , “bitmap” , “bit value” , “field value” and “payload” .
Further, one panel discussed herein refers to one or more antenna elements deployed at a certain area of a terminal device. A panel discussed herein can refer to downlink panel, uplink panel, panel type, panel status, capability value set, reference signal (RS) resource, RS resource set, antenna port, antenna port group, beam, beam group. In this regard, the terms (and their equivalent expressions) “panel” , “panel type” , “set of antenna port (s) ” , “antenna element (s) ” , “antenna array (s) ” can be used interchangeably.
In addition, panel information discussed herein can refer to UE panel index/identification (ID) , downlink panel ID, uplink panel ID, panel type indication, panel status indication, capability value set index, RS resource ID, RS resource set ID, antenna port ID, antenna port group ID, beam ID, beam group ID.
Principles and implementations of the present disclosure will be described in detail below with reference to the figures.
Example environment
FIG. 1 illustrates a schematic diagram of an example communication environment 100 in which example embodiments of the present disclosure can be implemented. In the communication environment 100, a plurality of communication devices, including a terminal device 110 and a network device 120, can communicate with each other.
In the example of FIG. 1, the terminal device 110 may be a UE and the network device 120 may be a base station serving the UE. The serving area of the network device 120 may be called a cell.
It is to be understood that the number of devices and their connections shown in FIG. 1 are only for the purpose of illustration without suggesting any limitation. The communication environment 100 may include any suitable number of devices configured to implementing example embodiments of the present disclosure. In the following, for the purpose of illustration, some example embodiments are described with the terminal device 110 operating as a UE and the network device 120 operating as a base station. However, in some example embodiments, operations described in connection with a terminal device may be implemented at a network device or other device, and operations described in connection with a network device may be implemented at a terminal device or other device.
In some example embodiments, a link from the network device 120 to the terminal device 110 is referred to as a DL, while a link from the terminal device 110 to the network device 120 is referred to as an UL. In DL, the network device 120 is a transmitting (TX) device (or a transmitter) and the terminal device 110 is a receiving (RX) device (or a receiver) . In UL, the terminal device 110 is a TX device (or a transmitter) and the network device 120 is a RX device (or a receiver) .
The communications in the communication environment 100 may conform to any suitable standards including, but not limited to, Global System for Mobile Communications (GSM) , Long Term Evolution (LTE) , LTE-Evolution, LTE-Advanced (LTE-A) , New Radio (NR) , Wideband Code Division Multiple Access (WCDMA) , Code Division Multiple Access (CDMA) , GSM EDGE Radio Access Network (GERAN) , Machine Type Communication (MTC) and the like. The embodiments of the present disclosure may be performed according to any generation communication protocols either currently known or to be developed in the future. Examples of the communication protocols include, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols, 5.5G, 5G-Advanced networks, or the sixth generation (6G) networks.
In the communication environment 100, the terminal device 110 is deployed with more than one panel. As illustrated in FIG. 1, the terminal device 110 is deployed with panels 131 and 132. In the following, the panels 131 and 132 may be referred to as the first panel 131 and the second panel 132, respectively. In some embodiments, the first panel 131 and the second panel 132 may correspond to different sets of antenna port (s) /antenna element (s) /antenna array (s) . As an example, the first panel 131 may correspond to a first set of antenna ports and the second panel 132 may correspond to a second set of antenna ports.
In the communication environment 100, STxMP is supported. Specifically, the terminal device 110 may perform an uplink transmission over both of the panels 131 and 132 simultaneously.
In the communication environment 100, MTRP is also supported. As shown, the network device 120 is coupled with or equipped with two TRPs, including a first TRP 141 and a second TRP 142. In the following, the TRP 141 may be referred to as the first TRP 141, and the TRP 142 may be referred to as the second TRP 142.
In some embodiments, the first TRP 141 and the second TRP 142 may be associated with different SRS resource sets. For example, the first TRP 141 is associated with a first SRS resource set and the second TRP 230-2 is associated with a second SRS resource set.
In the case of the multi-TRP, the terminal device 110 may communicate with the network device 120 via both of the first TRP 141 and the second TRP 142. As an example shown in FIG. 1, the terminal device 110 may communicate with the first TRP 141 via the first panel 131 and communicate with the second TRP 142 via the second panel 132 simultaneously.
In the communication environment 100, STxMP is supported for UL transmission, for example PUSCH transmission. In the present disclosure, example embodiments are described with respect to PUSCH transmission. However, it is to be noted that the principles may be applied to other type of UL transmission.
The STxMP scheme may include SDM STxMP and SFN STxMP. FIG. 2A shows a schematic diagram of the SDM scheme. As shown, different layers are transmitted by different panels of the terminal device 110 simultaneously. For example, the layers with indices 0, ..., v1-1 may be transmitted by the first panel 131 and layers with indices v1, ..., v-1 may be transmitted by the second panel 132. Precoding matrices are used per panel of the terminal device 110. For example, W1 is used for the first panel 131, and W2 is used for the second panel 132. Antenna ports with indices p0, ..., p1-1 are associated with the first panel 131, and antenna ports with indices p1, ..., p-1 are associated with the second panel 132. Different beamforming is used per panel of the terminal device 110. For example, beam 1 is formed by the first panel 131, and beam 2 is formed by the second panel 132. Eventually, it can be treated as different panels, ports, beams, and/or layers to different TRPs. The TRP 141 and TRP 142 jointly process the received PUSCH. It is noted that this scheme may not only be used for transmission of 1 codeword (CW) , i.e., 1 transport block (TB) , but also 2 CWs, for example by transmitting 1 TB per panel/TRP and each of the CW can be mapped to 1, 2, 3, 4 layer (s) .
FIG. 2A shows a schematic diagram of the SFN scheme. As shown, the same PUSCH (which is the same TB in the example) is transmitted to multiple TRPs simultaneously via different panels of the terminal device 110. The same number of layers is assumed per panel. For example, layers with indices 0, ..., v-1 are transmitted by the first the first panel 131 and the second panel 132. Precoding matrices are used per panel of the terminal device 110. For example, W1 is used for the first panel 131, and W2 is used for the second panel 132. Beamforming is used per panel of the terminal device 110. For example, beam 1 is formed by the first panel 131, and beam 2 is formed by the second panel 132. The TRP 141 and TRP 142 process the received PUSCH separately or jointly.
Antenna ports with indices p0, ..., p-1 are associated with the first panel 131 and the second panel 132. Further, a first set of antenna ports is associated with the first panel 131 and a second set of antenna ports is associated with the second panel 132. In some embodiments, the same number of antenna ports are associated with the first panel 131 and the second panel 132, i.e., a first number of the first set of antenna ports is the same with a second number of the second set of antenna ports. As an example, antenna ports with indices p0-0, ..., p0-m are associated with the first panel 131, and antenna ports with indices p1-0, ..., p1-m are associated with the second panel 132.
Alternatively, in some embodiments, different numbers of antenna ports are associated with the first panel 131 and the second panel 132, i.e., a first number of the first set of antenna ports is different from a second number of the second set of antenna ports. As an example, antenna ports with indices p0-0, ..., p0-m are associated with the first panel 131, and antenna ports with indices p1-0, ..., p1-n are associated with the second panel 132, where values ofm and n are different.
PUSCH transmission (s) may be dynamically scheduled by an UL grant in DCI, which is also referred to as DG in the present disclosure. For DG, the related fields for UL Multiple-Input Multiple-Output (MIMO) scheduling in DCI format 0_1/0_2 may include, but not limited to, transmit power control (TPC) command for scheduled PUSCH and second TPC command for scheduled PUSCH, open-loop power control parameter set indication, SRS resource set indicator, SRS resource indicator and second SRS resource indicator, precoding information and number of layers and second precoding information, antenna ports, phase tracking reference signal (PTRS) -demodulation reference signal (DMRS) association and second PTRS-DMRS association.
PUSCH transmission (s) may also correspond to a configured grant which is also referred to as CG in the present disclosure. The CG further include type 1 CG and type 2 CG. The PUSCH transmission with type 1 CG is semi-statically configured to operate upon the reception of the higher layer parameter configuredGrantConfig including rrc-ConfiguredUplinkGrant without the detection of an UL grant in a DCI. The PUSCH transmission with type 2 CG is semi-persistently scheduled by an UL grant in a valid activation DCI after the reception of the higher layer parameter configuredGrantConfig not including rrc-ConfiguredUplinkGrant.
For CG, the related IEs in radio resource control (RRC) for type 1 (i.e., rrc-ConfiguredUplinkGrant is provided) CG based UL transmission may include the following:
● powerControlLoopToUse & powerControlLoopToUse2 ENUMERATED {n0, n1 } ,
● p0-PUSCH-Alpha & p0-PUSCH-Alpha2,
● Within the IE rrc-ConfiguredUplinkGrant, the followings are included:
√ pathlossReferenceIndex & pathlossReferenceIndex2,
√ antennaPort INTEGER (0.. 31) ,
√ precodingAndNumberOfLayers & precodingAndNumberOfLayers2-r17 INTEGER (0.. 63) ,
√ srs-ResourceIndicator & srs-ResourceIndicator2 INTEGER (0.. 15) .
For type 2 CG, since rrc-ConfiguredUplinkGrant is NOT provided, DCI addressed to CS-RNTI is needed for activation/deactivation of CG based UL transmission. The above fields in DCI format 0_1/0_2 can still be used to provide UL MIMO related parameters.
In the following, a transmission with a DG may be referred to as a DG transmission and a transmission with a CG may be referred to as a CG transmission. More specifically, a transmission with a type 1 CG may be referred to as a type 1 CG transmission and a transmission with a type 2 CG may be referred to as a type 2 CG transmission.
In addition, UL MTRP schemes may include PUSCH STxMP including PUSCH STxMP, S-DCI based SDM STxMP, M-DCI based STxMP of uplink transmissions. For S-DCI based SDM STxMP, different layers and/or DMRS ports of one PUSCH (or two CWs) are separately precoded and transmitted from different panels of the terminal device 110 simultaneously. For S-DCI based SFN STxMP, all of the same layers and/or DMRS ports of one PUSCH are transmitted from two different panels of the terminal device 110 simultaneously. For M-DCI based STxMP of uplink transmissions, two PUSCHs are associated with different TRPs and transmitted from different panels of the terminal device 110. The total number of layers of these two PUSCHs is up to 4. Moreover, STxMP of a DG transmission and a DG transmission, STxMP of a CG transmission and a CG transmission and STxMP of a CG transmission and a DG transmission are all supported.
Traditionally, a PUSCH or a physical uplink control channel (PUCCH) transmission other than PUCCH transmissions with sidelink (SL) hybrid automatic repeat request acknowledgement (HARQ-ACK) reports, including repetitions if any, can be of priority index 0 or of priority index 1. For a configured grant PUSCH transmission, the UE determines a priority index from phy-PriorityIndex, if provided.
For a PUSCH transmission with semi-persistent channel state information (CSI) report, the UE determines a priority index from a priority indicator field, if provided, in a DCI format that activates the semi-persistent CSI report. If a priority index is not provided to a UE for a PUSCH or a PUCCH transmission other than PUCCH transmissions with SL HARQ-ACK reports, the priority index is 0.
As can be seen, the traditional solution does not support STxMP of UL transmissions. Therefore, various aspects including configuration and collision handling, need to be enhanced to support STxMP of UL transmissions, for example combination of CG transmission and DG transmission, combination of two DG transmissions, and combination of two CG transmissions.
In order to solve at least part of the above problems, embodiments of the present disclosure provide a solution for STxMP of UL transmissions. Principle and implementations of the present disclosure will be described in detail below with respect to drawings.
In the following, although some embodiments are described with respect to two TRPs and two panels, these embodiments are only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitations as to the scope of the present disclosure. It is to be understood that the present disclosure described herein can be implemented in various manners other than the ones described below.
Further, it is to be understood that the operations at the terminal device 110 and the network device 120 should be coordinated. In other words, the network device 120 and the terminal device 110 should have common understanding about configuration, parameter and so on.Such common understanding may be implemented by any suitable interactions between the network device 120 and the terminal device 110 or both the network device 120 and the terminal device 110 applying the same rule/policy. In the following, although some operations are described from a perspective of the terminal device 110, it is to be understood that the corresponding operations should be performed by the network device 120. Similarly, although some operations are described from a perspective of the network device 120, it is to be understood that the corresponding operations should be performed by the terminal device 110. Merely for brevity, some of the same or similar contents are omitted here.
Examples configurations and indications for STxMP
Reference is made to FIG. 3, which illustrates a signaling flow 300 of configurations and indications for STxMP in accordance with some embodiments of the present disclosure. For the purposes of discussion, the signaling flow 300 will be discussed with reference to FIG. 1, for example, by using the terminal device 110 and the network device 120.
The network device 120 transmits 305, to the terminal device 110, configuration information for UL transmissions associated with a first SRS resource set and a second SRS resource set. The configuration information may be transmitted in a single signalling or multiple signalling. The UL transmissions may include a first UL transmission and a second UL transmission. The configuration information may include a first parameter set and a second parameter set to be used for the uplink transmissions, a first indication of a simultaneous transmission scheme of the UL transmission, and mapping information. The mapping information indicates at least one of correspondence between the first and second parameter sets and the first and second SRS resource sets, or a combination of the number of layers associated with the first and second parameter sets.
In other words, the configuration information may indicate the UL MTRP scheme to be used and include configurations to support the indicated STxMP scheme. For example, combinations and/or restrictions of SRS resource set, SRS resources, precoding and the number of layers may be indicated. The configuration information may be used by the terminal device 110 to interpret the value of indicated SRS resource indicator (for example, srs-ResourceIndicator or the “SRI” field) , and/or precoding information and number of layers (such as, precodingAndNumberOfLayers or the “TPMI” field) . For type 1 CG, the configuration information may be included in one or two CG configurations. For DG and type 2 CG, at least part of the configuration information may be via DCI. The configuration information will be described below in detail.
The terminal device 110 receives the configuration information from the network device 120. Then, the terminal device 110 determines 310, based at least in part on the first indication and the mapping information, the first and second parameter sets associated with the first and second SRS resource sets, respectively. In other words, the terminal device 110 determines an association of the first and second parameter sets with the first and second SRS resource sets. For example, the terminal device 110 may determine that the first parameter set is associated with the first SRS resource set and the second parameter set is associated with the second SRS resource set. Alternatively, the terminal device 110 may determine that the first parameter set is associated with the second SRS resource set and the second parameter set is associated with the first SRS resource set.
Next, the terminal device 110 performs 315, based on the first and second parameter sets, the uplink transmissions with the network device 120. For example, if the terminal device 110 determines that the first parameter set is associated with the first SRS resource set and the second parameter set is associated with the second SRS resource set, the terminal device 110 may perform, based on the first parameter set, a first UL transmission to the first TRP 141 associated with the first SRS resource set, and perform, based on the second parameter set, a second UL transmission to the second TRP 142 associated with the second SRS resource set.
Some embodiments are now described with respect to the configuration information.
As mentioned above, the configuration information may include the first indication of the simultaneous transmission scheme of the UL transmission. For example, the terminal device 110 is provided with an indication to support the STxMP schemes in the CG configuration and/or in the DG configuration. The first indication may indicate the simultaneous transmission scheme in any suitable manner. Some examples are described below.
In some embodiments, the first indication may explicitly indicate the UL MTRP scheme to be used, for example, an explicit indication of SFN STxMP or SDM STxMP. Alternatively, the first indication may implicitly indicate the UL MTRP scheme to be used.
In some embodiments, iftwo SRS resource set is configured, the terminal device 110 may assume that the UL MTRP scheme is enabled. In addition, CORESETPoolIndex value associated with the SRS resource sets may be configured, if M-DCI mode is enabled. Further, TAG IDs associated with the SRS resource sets may be configured, iftwo-TA mode is enabled.
In such embodiments, the terminal device 110 may need to be provided with additional signaling on the exact MTRP schemes to be used. More specifically, the terminal device 110 may need a signaling to differentiate STxMP and TDM repetition. Furthermore, the terminal device 110 may need a signaling to differentiate SFN STxMP and SDM STxMP.
In some embodiments, for CG, an addition IE may be added in the higher layer parameter ConfiguredGrantConfig, which is applicable for both type 1 CG and type 2 CG. For example, an IE (named such as StxmpSchemePUSCH-r18) with value ENUMERATED {SFN, SDM} may be used to differentiate SFN scheme and SDM scheme. Alternatively, or in addition, an IE (named g.g, MIMOParam-r18) with value ENUMERATED {TDM, SFN, SDM} , or with value ENUMERATED {TDM, STxMP} can be used. Alternatively, or in addition, the repetition number (e.g., parameter repK) may be configured as “1” or it is not present, to differentiate STxMP and TDM repetition (e.g., more than 1) . In this case, the above-mentioned IE MIMOParam-r18 may not be needed.
Alternatively, the first indication of the STxMP scheme may be provided per terminal device, or per BWP/CC, which means that the first indication is not included in IE ConfiguredGrantConfig. For each IE ConfiguredGrantConfig, STxMP may or may not apply depending on other indications in the configuration information as will be described below.
In some embodiments, for DG, the first indication (i.e., an indication of STxMP schemes) may be separately provided in another IE, for example, the IE ServingCellConfig.
In addition to the first indication, the configuration information may further include or indicate the first parameter set and the second parameter set to be used for the UL transmissions. The first and second parameter sets, which may be individually or collectively referred to as parameter set, can include any parameter for performing the UL transmission.
In some embodiments, the parameter set may include at least one parameter used for power control, for example, the parameters pathlossReferenceIndex, p0-PUSCH-Alpha, powerControlLoopToUse in RRC message, or the fields “TPC command for scheduled PUSCH” , “Open-loop power control parameter set indication” in DCI. Alternatively, or in addition, the parameter set may include an SRS resource indicator (SRI) , for example, the parameter srs-ResourceIndicator in RRC message, or the field “SRS resource indicator” in the DCI. Alternatively, or in addition, the parameter set may include at least one of precoding information (for example, TPMI) , a number of layers, an identity of a control response set, or an identity of a TAG. It is noted that when the term “parameter set” or “a set of parameters” is used, it may mean one or more of the parameters mentioned above and not necessarily means all of them.
In some embodiments, for example, ifone CG configuration is configured to support STxMP, the first parameter set may include one or more of: the parameter pathlossReferenceIndex, the parameter p0-PUSCH-Alpha, the parameter powerControlLoopToUse, the parameter srs-ResourceIndicator or the parameter precodingAndNumberOfLayers. The first parameter set may additionally include one or more of: the parameter AssociatedCORESETPoolIndex, or the parameter AssociatedTAG. Accordingly, the second parameter set may include one or more of: the parameter pathlossReferenceIndex2, the parameter p0-PUSCH-Alpha2, the parameter powerControlLoopToUse2, the parameter srs-ResourceIndicator2 or the parameter precodingAndNumberOfLayers2. The first parameter set may additionally include one or more of: the parameter AssociatedCORESETPoolIndex2, or the parameter AssociatedTAG2.
In some embodiments, based on the capability of the terminal device 110, the single panel codebook or the multiple panel codebook may be configured for CG transmission. For single panel codebook, each SRS resource set may be associated with codebooks for a parameter N1 for the horizontal number of elements, a parameter N2 for vertical number of elements, and parameters O1, O2 for oversampling factors. In some embodiments, based on configurations or the capability of the terminal device 110, the parameters (N1, N2) can take values of (4, 1) or (2, 2) , and the parameters (O1, O2) can take values of (1, 1) and (2, 1) .
For multiple panel codebook, two SRS resource sets may be additionally associated with codebooks for the parameter Ng. In some embodiments, Ng may be equal to 2 based on configurations or the capability of the terminal device 110.
In the following, some embodiments are described with respect to type 1 CG and RRC signaling, i.e., the higher layer parameter rrc-ConfiguredUplinkGrant. It is to be understood that for DG and/or type 2 CG, the indications or parameters described with respect to higher layer parameter rrc-ConfiguredUplinkGrant can be provided via DCI. A correspondence between the higher layer parameters in RRC signaling and the fields in DCI can be envisaged and thus similar content will not be repeated for DCI. For example, the parameter SRS_resource_set_index in RRC signaling corresponds to the field “SRS resource set indicator” in DCI. The parameter srs-ResourceIndicator in RRC signaling corresponds to the field “SRS resource indicator” ( “SRI” ) in DCI. The parameter precodingAndNumberOfLayers in RRC signaling corresponds to the field “Precoding information and number of layers” ( “TPMI” ) in DCI. The parameter srs-ResourceIndicator2 in RRC signaling corresponds to the field “Second SRS resource indicator” ( “SRI2” ) in DCI. The parameter precodingAndNumberOfLayers2 in RRC signaling corresponds to the field “Second Precoding information and number of layers” ( “TPMI2” ) , or “Second Precoding information” ( “TPMI2” ) in DCI. The parameter AssociatedCORESETPoolIndex in RRC signaling corresponds to the field CORESETPoollndex value associated the CORESET for scheduling DCI.
In addition to the first indication and the parameter sets, the configuration information may include the mapping information. The mapping information may indicate correspondence between the first and second parameter sets and the first and second SRS resource sets, which is also referred to as “order information” . Alternatively, or in addition, the mapping information may indicate a combination of the number of layers associated with the first and second parameter sets, which is also referred to as “layer combination” .
In some embodiments, the correspondence between the parameter sets and SRS resource sets may be indicated implicitly or by default. For example, two parameter sets may be configured in higher layer parameter or indicated in DCI. Accordingly, the first parameter set is associated with a first SRS resource set by default and the second parameter set is associated with a second SRS resource set by default. In some embodiments, if a STxMP transmission falls back to a single panel transmission, the first parameter set is associated with a first SRS resource set by default, and the second parameter set can be invalid.
In the present disclosure, a first correspondence or a first order may refer to that the first parameter set is associated with the first SRS resource set and the second parameter set is associated with the second SRS resource set. Similarly, a second correspondence or a second order may refer to that the first parameter set is associated with the second SRS resource set and the second parameter set is associated with the first SRS resource set.
Alternatively, or in addition, in some embodiments, the correspondence between the parameter sets and SRS resource sets may be indicated by a specific indication in the configuration information, for example, an SRS resource set indication. Specifically, a first value of the specific indication may indicate that the first parameter set is associated with the first SRS resource set and the second parameter set is invalid. As used herein, the expression “a parameter set is invalid” means that the parameter set may not be presented or can be ignored. A second value of the specific indication may indicate that the first parameter set is associated with the second SRS resource set and the second parameter set is invalid. Alternatively, or in addition, a third value of the specific indication may indicate that the first parameter set is associated with the first SRS resource set and the second parameter set is associated with the second SRS resource set. Alternatively, or in addition, a fourth value of the specific indication may indicate the first parameter set is associated with the second SRS resource set and the second parameter set is associated with the first SRS resource set.
In an example of type 1 CG, ifone CG configuration is configured to support STxMP, the two parameter sets may be included in the higher layer parameter, for example, rrc-ConfiguredUplinkGrant. In this example, the parameter SRS_resource_set_index may be provided in CG configuration for providing the order information (e.g., which TRP, panel of the terminal device 110, SRS resource set the set of parameters are associated with) . A first value of the parameter SRS_resource_set_index may indicate that the first parameter set is associated with a first SRS resource set and the second parameter set may not be present or can be ignored. A second value of the parameter SRS_resource_set_index may indicate that the first parameter set is associated with a second SRS resource set and the second parameter set may not be present or can be ignored. An optional third value of the parameter SRS_resource_set_index may indicate that the first parameter set is associated with a first SRS resource set and the second parameter set is associated with a second SRS resource set. An optional fourth value of the parameter SRS_resource_set_index may indicate that the first parameter set is associated with a second SRS resource set and the second parameter set is associated with a first SRS resource set.
In some embodiments, the configuration information may include a layer combination indication to indicate the number of layers associated with the first and second parameter sets. For example, the SRS resource set indication may be used as the layer combination indication. Specifically, a fifth value of the layer combination indication may indicate that the first parameter set is associated with a first number of layers and the second parameter set is associated with a second number of layers. A sixth value of the layer combination indication may indicate that the first parameter set is associated with the second number of layers and the second parameter set is associated with the first number of layers. An optional seventh value of the layer combination indication may indicate that both the first and second parameter sets are associated with the first number of layers. An eighth value of the layer combination indication may indicate both the first and second parameter sets are associated with the second number of layers.
Continuing with the above example of one CG configuration for type 1 CG, if SDM STxMP is configured as the UL MTRP scheme, the layer combination indication may be needed. The parameter SRS_resource_set_index may also be used to indicate layer combination. For example, a fifth value of the parameter SRS_resource_set_index may indicate that the first parameter set is associated with a first SRS resource set and the associated number of layers is 1, and the second parameter set is associated with a second SRS resource set and the associated number of layers is 2. A sixth value of the parameter SRS_resource_set_index may indicate that the first parameter set is associated with a first SRS resource set and the associated number of layers is 2, and the second parameter set is associated with a second SRS resource set and the associated number of layers is 1. An optional seventh value of the parameter SRS_resource_set_index may indicate that the first parameter set is associated with a first SRS resource set and the associated number of layers is 1, and the second parameter set is associated with a second SRS resource set and the associated number of layers is 1. An optional eighth value of the parameter SRS_resource_set_index may indicate that the first parameter set is associated with a first SRS resource set and the associated number of layers is 2, and the second parameter set is associated with a second SRS resource set and the associated number of layers is 2.
In this example, it is assumed that the correspondence is indicated in a default manner. However, this assumption is an example without any limitation.
In some embodiments, the correspondence and the layer combination may be indicated jointly. For example, a specific indication in the configuration information may be used to indicate both the correspondence and the layer combination. Specifically, a ninth value of the specific indication may indicate that the first parameter set is associated with the first SRS resource set and a first number of layers, and the second parameter set is associated with the second SRS resource set and a second number of layers. A tenth value of the specific indication may indicate that the first parameter set is associated with the first SRS resource set and a second number of layers, and the second parameter set is associated with the second SRS resource set and the first number of layers. An optional eleventh value of the specific indication may indicate that the first parameter set is associated with the second SRS resource set and the first number of layers, and the second parameter set is associated with the first SRS resource set and the second number of layers. An optional twelfth value of the specific indication may indicate that the first parameter set is associated with the second SRS resource set and the second number of layers, and the second parameter set is associated with the first SRS resource set and the first number of layers.
Continuing with the above example of one CG configuration for type 1 CG, if SDM STxMP is configured as the UL MTRP scheme, the layer combination indication may be needed. The parameter SRS_resource_set_index may be used to indicate both the order information and the layer combination. For example, a ninth value of the parameter SRS_resource_set_index may indicate that the first parameter set is associated with a first SRS resource set and the associated number of layers is 1, and the second parameter set is associated with a second SRS resource set and the associated number of layers is 2. A tenth value of the parameter SRS_resource_set_index may indicate that the first parameter set is associated with a first SRS resource set and the associated number of layers is 2, and the second parameter set is associated with a second SRS resource set and the associated number of layers is 1. An optional eleventh value of the parameter SRS_resource_set_index may indicate that the first parameter set is associated with a second SRS resource set and the associated number of layers is 1, and the second parameter set is associated with a first SRS resource set and the associated number of layers is 2. An optional twelfth value of the parameter SRS_resource_set_index may indicate that the first parameter set is associated with a second SRS resource set and the associated number of layers is 2, and the second parameter set is associated with a first SRS resource set and the associated number of layers is 1.
In some embodiments, a separate indication may be used for layer combination. The separate indication may indicate at least one of the following: a first number of layers and a second number of layers, the first number of layers and a total number of layers of the combination, or the first number of layers and an indication indicating whether the second number of layers is the same with or different from the first number of layers.
For example, the indication may have values indicating layer combinations of (1, 1) , (2, 2) , (1, 2) , and optionally (2, 1) , respectively. Alternatively, the indication may have values indicating the following respectively: that the layer combination of (1, 2) is used for the first order, the layer combination of (1, 2) is used for the second order, the layer combination of (2, 1 ) is used for the first order and the layer combination of (2, 1) is used for the second order. In some embodiments, based on the capability of the terminal device 110, the layer combination may include (1, 3) and (3, 1) with or without mapping order.
Alternatively, or in addition, the indication may have values indicating the total number of layers, e.g., 2, 3, 4. In some embodiments, based on the capability of the terminal device 110, the number of layers may be up to 8.
Alternatively, or in addition, the indication may have values indicating same number of layers and different number of layers, respectively. In this case, another parameter or indication, for example, srs-ResourceIndicator, or precodingAndNumberOfLayers may further provide an indication of the number of layers. For example, in the case of the same number of layers and srs-ResourceIndicator, precodingAndNumberOfLayers indicating 1 layer or 2-layers, then srs-ResourceIndicator2, precodingAndNumberOfLayers2 are associated with l-layer or 2-layers, respectively. In the case of different number of layers (or (1, 2) , or total number is 3) , and srs-ResourceIndicator, precodingAndNumberOfLayers indicating 1 layer or 2-layers, then srs-ResourceIndicator2, precodingAndNumberOfLayers2 are associated with 2-layer or l-layers respectively.
In addition, if the separated indication indicates the layer combination of (1, 1) , the layer combination of (2, 2) , or total number 2 or 4, or same number of layers, the parameter SRS_resource_set_index is not present or is to be ignored for interpreting the number of layers.
In an example, if a layer combination of 1 layer and 2 layers (or a layer combination of 2 layers and 1 layer) is supported or indicated, and 1 layer transmission is associated with the first SRS resource set, then the terminal device 110 expects that 2 layers transmission is associated with the second SRS resource set , or the terminal device 110 does not expect 1 layer transmission is associated with the second SRS resource set. And vice versa. The number of layers indicated via srs-ResourceIndicator, precodingAndNumberOfLayers may be applied for interpretation (e.g., used to infer the number of layers) of values indicated via srs-ResourceIndicator2, precodingAndNumberOfLayers2. In addition, for DG and type 2 CG DCI, the term “applied for interpretation” may also include to determine the bitwidth or corresponding look-up table (or raw of the table) for “SRI2” field and/or “TPMI2” field in DCI, as described below.
In some embodiments, if SFN STxMP is configured as the UL MTRP scheme, the number of layers indicated via srs-ResourceIndicator, precodingAndNumberOfLayers is the same as the number of layers indicated via srs-ResourceIndicator2, precodingAndNumberOfLayers2. In other words, the number of layers indicated via srs-ResourceIndicator, precodingAndNumberOfLayers is applied for interpretation of the values indicated via srs-ResourceIndicator2, precodingAndNumberOfLayers2. A separated indication may be used for 1 layer or 2-layers. In some embodiments, based on the capability of the terminal device 110, the separated indication may be used for 3 or 4 layers.
In addition, or alternatively, if the number of layers is determined by “SRS_resource_set_index” or the layer combination indication, the parameter “srs-ResourceIndicator” and “precodingAndNumberOfLayer” is not used to determine the number of layers anymore.
In addition, or alternatively, if the number of layers is determined by “SRS_resource_set_index” or the layer combination indication, and the parameter “srs-ResourceIndicator” and “precodingAndNumberOfLayer” , then the parameter “srs-ResourceIndicator2” and “precodingAndNumberOfLayer2” is not used to determine the number of layers anymore.
In some embodiments, ifPUSCH repetition Type A or PUSCH repetition Type B is configured or enabled for STxMP, PUSCH transmission used herein may refer to an actual transmission or refer to a nominal transmission. In some embodiments, if PUSCH repetition Type A or PUSCH repetition Type B is configured or enabled, to enhance the diversity, the repetition may be transmitted with alternating the mapping order and/or the number of layers as indicated by the first indication. For example, the indicated order is first then second, the alternating order is second then first. In addition, the alternating for more than 2 repetitions can be in cyclic manner or in sequential manner, as configured.
Some embodiments where the first and second parameter sets are associated with a single configuration are described above. Alternatively, in some embodiments, the first parameter set may be associated with a first configuration and the second parameter set may be associated with a second configuration. In such embodiments, the configuration information further indicates an association between the first configuration and the second configuration.
Some such embodiments are described by taking the type 1 CG as example. For type 1 CG, if two CG configurations are configured to support STxMP, in rrc-ConfiguredUplinkGrant of each CG configuration, there may be only a single parameter set, for example, the first parameter set.
The association between these two CG configurations are needed to indicate the terminal device 110 that these two CGs can be used for STxMP. For example, the association may be indicated via indexes of the CG configurations (e.g., ConfiguredGrantConfigIndex, or configuredGrantConfigIndexMAC) .
In an example, the STxMP scheme and the indexes of the associated two CG configurations may be provided, such as the following:
wherein the parameter StxmpSchemePUSCH-r18 indicates the STxMP scheme, the parameters ConfiguredGrantConfigIndex1 and ConfiguredGrantConfigIndex1 are indexes of the two configurations, and the parameter LayerCombination is the layer combination indication as described above.
In another example, the index of the associated CG configuration can be provided in the other CG, such as the following:
AssocatiedCGForSTxMP ConfiguredGrantConfigIndex-r18
wherein the parameter AssocatiedCGForSTxMP is the index of the associated CG configuration.
In a further example, each of two CG configurations can be provided with the same identification, which is also referred to as “linkID” , to identify that those two CGs are to be used together, such as the following:
CGForSTxMPLinkID INTEGER (0.. maxNrofCGSTxMPLinks-r18)
wherein the parameter CGForSTxMPLinkID is the linkID.
In addition, in some embodiments, the parameter SRS_resource_set_index provided in each of CG configurations may be used to indicate the correspondence. For example, a first value may indicate that the parameter set in the CG is associated with a first SRS resource set and a second value may indicate that the parameter set in the CG is associated with a second SRS resource set. Alternatively, the parameter SRS_resource_set_index may be not explicitly provided. Instead, one or more predefined rules may be applied, e.g., the CG configuration with a lower index or a lower order in a CG list is associated with a first SRS resource.
If SDM STxMP is configured as the UL MTRP scheme, a layer combination indication may be needed. The parameter SRS_resource_set_index may also be used as layer combination indication. For example, a third value may indicate that the parameter set in the CG is associated with a first SRS resource set and the associated number of layers is 1. A forth value may indicate that the parameter set in the CG is associated with a first SRS resource set and the associated number of layers is 2. A fifth value may indicate that the parameter set in the CG is associated with a second SRS resource set and the associated number of layers is 1. A sixth value may indicate that the parameter set in the CG is associated with a second SRS resource set and the associated number of layers is 2.
Alternatively, a separated IE may be used for layer combination.
In some embodiment, the parameter SRS_resource_set_index in a first CG may be applied for interpretation of SRS_resource_set_index and the parameter set in a second. For example, for the first CG, SRS_resource_set_index is associated with the first SRS resource set and 1 layer (such as, with the third value) , then for the second CG, SRS_resource_set_index shall have the sixth value, or it can be absent but implying that SRS_resource_set_index is associated with the second SRS resource set and 2 layers.
In some embodiments, if a layer combination of 1 layer and 2 layers (or a layer combination of 2 layers and 1 layer) is supported or indicated, and 1 layer transmission is associated with the first SRS resource set, then the terminal device 110 expects that 2 layers transmission is associated with the second SRS resource set, or the terminal device 110 does not expect 1 layer transmission is associated with the second SRS resource set. And vice versa.
In some embodiments, if SFN STxMP is configured as the UL MTRP scheme, the number of layers indicated via srs-ResourceIndicator, precodingAndNumberOfLayers via the first CG is the same as the number of layers indicated via srs-ResourceIndicator, precodingAndNumberOfLayers via the second CG. In other words, the number of layers indicated via srs-ResourceIndicator, precodingAndNumberOfLayers in the first CG is applied for interpretation of the values indicated via srs-ResourceIndicator, precodingAndNumberOfLayers in the second CG. In addition, the parameter SRS_resource_set_index in the first CG may be applied for interpretation of SRS_resource_set_index in the second CG.
In addition, or alternatively, if the number of layers is determined by the parameter SRS_resource_set_index or the layer combination indication, or the parameters in a CG, the parameter “srs-ResourceIndicator” and “precodingAndNumberOfLayer” in another CG is not used to determine the number of layers anymore.
Some embodiments are described above. Now some more embodiments are described with respect to the layer combination and order information.
In some embodiments, the SRS resource ser indication (for example, SRS_resource_set_index) may be used to indicate the layer combination and the order information. Alternatively, in some embodiments, the SRS resource ser indication (for example, SRS_resource_set_index) may be used to indicate the layer combination information, or the order information. In some embodiments, the order information may be not explicitly configured, instead a default order can be assumed. In some embodiments, the layer combination may be provided via a dedicated signaling other than the SRS resource ser indication (for example, SRS_resource_set_index) . If the layer combination and order information is set, the value of the first parameter set can be applied for interpretation of the second parameter set.
To sum up, there may be two correspondences or two orders. For the first order, the first SRS resource set is associated with the first parameter set and the second SRS resource set is associated with the second parameter set. For the second order, the first SRS resource set is associated with the second parameter set and the second SRS resource set is associated with the first parameter set. There are four layer combinations including layer combinations of (1, 1) , (1, 2) , (2, 1) and (2, 2) , where the layer combination for the SFN scheme is considered as (1, 1) and (2, 2) . Given that, there are 8 possibilities as shown in Table 1.
In addition, for a fallback case, there may be only a first SRS resource set or a second SRS resource set, each with layers of 1, 2, 3, or 4. Given that, there may also be 8 fallback possibilities. In this case, the first or second SRS resource set may be determined by default or indicated via the SRS resource set indication (for example, SRS_resource_set_index) , and the number of layers may be indicated by the first SRI or TPMI.
Table 1
As mentioned above, values of a configuration (for example, the number of layers) determined for the first SRS resource set may be applied for interpretation of the SRI2 field and/or the TMPI field, or interpretation of the parameters srs- ResourceIndicator2, precodingAndNumberOfLayers2. For example, the bitwidth of the related DCI field, or configured value of related RRC IE may be impacted. For another example, the corresponding look-up table (or rows of the table) may be impacted.
In some embodiments, if the number of layers is not indicated, the possible value of SRI, TPMI, SRI2, or TPMI2 may need to include the sum of possible combinations for all possible number of layers. For example, the number of candidate values that can be indicated via SRS resource indicator isand the bitwidth of SRI or SRI2 can be Ceil
If the number of layers is indicated or known, the possible values of SRI, TPMI, SRI2, or TPMI2 may only need to include possible combinations for the indicated number of layers, or the most possible combinations for all possible number of layers. For example, the number of candidate values that can be indicated via SRS resource indicator is and the bitwidth of SRI or SRI2 can be Ceil
N_SRS is the number of SRS resources in corresponding SRS resource set. X can be the maximal number of layers that can be transmitted, for example, min (L_max, N_SRS) , where L_max the max rank or configured maximal number of layers or the supported maximal number of layers reported by the terminal device 110. In some embodiments, X, L_max, can be per panel, or per SRS resource set.
In some embodiments, the terminal device 110 may determine, according to a first portion of a first pre-defined look-up table, a first value of a first SRI. Then, the terminal device 110 may determine, according to a second portion of a first pre-defined look-up table, a second value of a second SRI. The second portion is the same with or different from the first portion and is determined based on the first value, the first indication and the mapping information.
FIG. 4A shows an example look-up table 400A for a second SRI indication (SRI2 field in DCI, or srs-ResourceIndicator2, or srs-ResourceIndicator in the second CG) for non-codebook based PUSCH transmission, where Lmax = 2 or Lmax, 2 = 2. L_max is given by the parameter maxMIMO-Layers of PUSCH-ServingCellConfig of the serving cell if configured, otherwise, is given by the maximum number of layers for PUSCH supported by the UE for the serving cell for non-codebook based operation. Lmax, 2 is the max number of layers for the second panel or for the second TRP or for the second SRS resource set. N_SRS is the number of SRS resources in corresponding SRS resource set.
The table 400A shows a mapping from the second SRI indication to one or more resource IDs in an SRS resource set. Specifically, an item in the first, third and fifth columns of table 400A represents a value of the second SRI indication (SRI2 field in DCI, or srs-ResourceIndicator2, or srs-ResourceIndicator in the second CG) , and an item in the second, fourth and sixth columns represents one or more resource IDs in the corresponding SRS resource set. For example, a value of 0 in the second, fourth and sixth columns may refer to the first SRS resource in the corresponding SRS resource set, such as the SRS resource with the lowest ID. For another example, values of (0, 1) in the second, fourth and sixth columns may refer to the first and second SRS resources in the corresponding SRS resource set, such as the two SRS resources with the lowest IDs.
In the case of SDM STxMP and a layer combination of 1 layer and 2 layers or a layer combination of 2 layers and 1 layer, if the first SRI is associated with a transmission of 2 layers, the regions with solid lines in the table 400A may be used to determine a value of the second SRI. In the regions with solid lines, a value of the second SRI indication corresponds to one SRS resource in the corresponding SRS resource set. As a result, one SRS resource is determined. If the first SRI is associated with a transmission of 1 layer, the regions with dash lines in the table 400A may be used to determine a value of the second SRI. In the regions with dash lines, a value of the second SRI indication corresponds to two SRS resources in the corresponding SRS resource set. As a result, two SRS resources are determined.
In the case of SFN STxMP, ifthe first SRI is associated with a transmission of 1 layer, the regions with solid lines in the table 400A may be used to determine a value of the second SRI. In the regions with solid lines, a value of the second SRI indication corresponds to one SRS resource in the corresponding SRS resource set. As a result, one SRS resource is determined. If the first SRI is associated with a transmission of 2 layers, the regions with dash lines in the table 400A may be used to determine a value of the second SRI. In the regions with dash lines, a value of the second SRI indication corresponds to two SRS resources in the corresponding SRS resource set. As a result, two SRS resources are determined.
Alternatively, or in addition, in some embodiments, the terminal device 110 may determine, according to a first portion of a second pre-defined look-up table, a third value of a first TPMI. The terminal device 110 may determine, according to a second portion of a second pre-defined look-up table, a fourth value of a second TPMI. The second portion may be the same with or different from the first portion and may be determined based on the third value, the first indication and the mapping information.
FIG. 4B shows an example look-up table 400B for second precoding information (for example, TPMI2 field, precodingAndNumberOfLayers2, precodingAndNumberOfLayers in the second CG) for 4 antenna ports, if transform precoder is disabled, maxRank = 2, (or maxRank, 2=2) and ul-FullPowerTransmission =fullpowerMode1.
The table 400B shows a mapping from the second precoding information to an UL precoding codebook. Specifically, an item in the first and third columns of table 400B represents a value of the second precoding information (for example, TPMI2 field, precodingAndNumberOfLayers2, precodingAndNumberOfLayers in the second CG) , and an item in the second and fourth columns represents an index of an UL precoding codebook.
In the case of SDM STxMP and a layer combination of 1 layer and 2 layers or a layer combination of 2 layers and 1 layer, if the first TPMI is associated with a transmission of 2 layers, the regions with solid lines in the table 400B may be used to determine a value of the second TPMI. The regions with solid lines are used in the case of 1 layer. If the first TPMI is associated with a transmission of 1 layer, the regions with dash lines in the table 400B may be used to determine a value of the second TPMI. The regions with dash lines are used in the case of 2 layers.
In the case of SFN STxMP, if the first TPMI is associated with a transmission of 1 layer, the regions with solid lines in the table 400B may be used to determine a value of the second TPMI. The regions with solid lines are used in the case of 1 layer. If the first TPMI is associated with a transmission of 2 layers, the regions with dash lines in the table 400B may be used to determine a value of the second TPMI. The regions with dash lines are used in the case of 2 layers.
It is to be noted that the tables shown in FIG. 4A and FIG. 4B are only for illustration without any limitation. For each of CB based transmission and NCB based on transmission, there could be multiple tables depending also on antenna ports, transform precoder, max rank, full power mode, etc.
In some embodiments, the terminal device 110 may perform capability reporting to the network device 120. The capability report may indicate at least one of the following: whether the terminal device 110 support STxMP (for example, one or both of SDM, and SFN) for CG; whether the terminal device 110 support one CG configuration for STxMP for CG or two CG configurations for STxMP for CG; the supported number of CG configurations which can be configured for STxMP for CG; the supported number of candidate values of SRS resource set indicator; the supported number of the bitwidth of SRS resource set indicator in DCI; whether the terminal device 110 support layer combination indication; the supported layer combinations; whether the terminal device 110 support single panel or multiple panel codebook for CG transmission; whether the terminal device 110 support more than 4 Tx for CG; whether the terminal device 110 support PUSCH repetition (for example, one or both of type A and type B) for STxMP (for example, one or both of SDM, and SFN) .
By means of the configuration information as described above, STxMP can be supported. In this way, capacity and reliability can be increased and latency can be reduced.
Examples collision handling for STxMP
Reference is made to FIG. 5, which illustrates a signaling flow 500 of collision handling for STxMP in accordance with some embodiments of the present disclosure. For the purposes of discussion, the signaling flow 500 will be discussed with reference to FIG. 1, for example, by using the terminal device 110 and the network device 120.
The network device 120 transmits 505, to the terminal device 110, configuration information indicating a first configuration of a first uplink transmission and a second configuration of a second uplink transmission. The second uplink transmission is at least partly overlapped with the first uplink transmission during a duration. The first configuration indicates a first parameter set, and the second configuration indicates a second parameter set determined based at least in part on the first parameter set. In some embodiments, the second parameter set may be determined by the network device 110.
In some embodiments, the first and second configurations may be associated with different CORSETs. Alternatively, or in addition, the first and second configurations may be associated with different TAGs.
In some embodiments, an indication to enable the STxMP for the UL transmission may be provided by the network device 120 to the terminal device 110. For example, the indication may be a general signaling STxMP-PUSCH.
The terminal device 110 performs 515, based on the first and second parameter sets, the first and second uplink transmissions simultaneously during the duration. As compared with legacy solution where CG or DG PUSCH transmission based on priority if colliding in time domain, by means of STxMP in the present disclosure, the UL capacity can be increased, the scheduling latency can be reduced, and the flexibility can be increased.
In some embodiments, the first uplink transmission may be a CG uplink transmission (for example, CG PUSCH transmission) and the second uplink transmission may be a DG uplink transmission (for example, DG PUSCH transmission) . In such embodiments, the indication to enable the StxMP for UL transmission may be a specific signaling STxMP-CGandDG. In this way, STxMP PUSCH transmissions with DG and CD at the same time can be supported, enhancing scheduling flexibility and reducing latency.
In such embodiments where the first UL transmission is the CG PUSCH transmission and the second UL transmission is the DG PUSCH transmission, some common assumptions may be made. For example, the CG PUSCH has a higher priority than DG PUSCH, unless mentioned otherwise. For another example, a configuration of STxMP CG PUSCH transmission and DG PUSCH transmission is provided explicitly to the terminal device 110, for example, via the parameter STxMP-CGandDG in ServingCellConfig. The value of the parameter “STxMP-CGandDG” may be ENUMERATED {enable} . In addition, or alternatively, the value may indicate one of the scenarios as will be described below. Capability reporting from the terminal device 110 to the network device 120 may be needed to indicate whether the terminal device 110 can support STxMP-CGandDG.
In addition, or alternatively, separate capability reporting from the terminal device 110 to the network device 120 may be needed for each of the scenarios as will be described below. The capability report from the terminal device 110 to the network device 120 may indicate at least one of the following: whether the terminal device 110 support simultaneous transmission of single TRP CG and single TRP DG; whether the terminal device 110 support simultaneous transmission of single TRP CG and multi-TRP or STxMP DG; whether the terminal device 110 support simultaneous transmission of multi-TRP or STxMP CG and multi-TRP or STxMP DG; whether the terminal device 110 support simultaneous transmission of multi-TRP or STxMP CG and single-TRP DG.
Two SRS resource sets may be configured for the CB based transmission and NCB based transmission, respectively, e.g., with usage set to ′codebook′ or ′nonCodebook′ . Two SRS resource sets may be configured in srs-ResourceSetToAddModList and/or srs-ResourceSetToAddModListDCI-0-2. If both the above two IEs are configured, SRS resource set (s) configured in the IE srs-ResourceSetToAddModList may be used as the two SRS resource sets. In some embodiments, the first SRS resource set may be the SRS resource set with a lower resource set ID, unless specifically motioned.
In one example, for each Serving Cell and each configured uplink grant, if configured and activated, the medium access control (MAC) entity shall:
1> if the PUSCH duration of the configured uplink grant does not overlap with the PUSCH duration of an uplink grant received on the physical downlink control channel (PDCCH) , or if the PUSCH duration of the configured uplink grant does overlap with the PUSCH duration of an uplink grant received on the PDCCH but STxMP-CGandDG is configured for this Serving Cell:
1> if the PUSCH duration of the configured uplink grant does not overlap with the PUSCH duration for the same TRP of an uplink grant received on the PDCCH or in a Random Access Response or the PUSCH duration of a message A (MSGA) payload for this Serving Cell:
2> set the HARQ Process ID to the HARQ Process ID associated with this PUSCH duration;
2> if the configuredGrantTimer for the corresponding HARQ process is not running:
3> consider the NDI bit for the corresponding HARQ process to have been toggled;
3> deliver the configured uplink grant and the associated HARQ information to the HARQ entity.
In the following, some embodiments are described with respect to the case where the first UL transmission is the CG transmission and the second UL transmission is the DG transmission. However, it is only for the purpose of illustration and the principle and concept are applicable to other types of transmissions.
In some embodiments, the first parameter set may be associated with a first SRS resource set, and the second parameter set may be associated with a second SRS resource set. For example, the first UL transmission may be performed by the first TRP 141 or via the first panel 131, and the second UL transmission may be performed by the second TRP 142 or via the second panel 132. Such embodiments may be also referred to as scenario 1 or option 1.
Take the CG transmission as an example of the first UL transmission and the DG transmission as an example of the second UL transmission. FIG. 6 illustrates an example scenario 600. As shown in FIG. 6, the DG transmission starting at t+T is overlapped with the CG transmission starting at t+T. In the example scenario 600, the CG transmission is associated with the first TRP 141 or via the first panel 131, while the DG transmission is associated with the second TRP 142 or via the second panel 132. Since the panels of the terminal device 110 can perform transmission simultaneously, STxMP for CG and DG transmissions can be supported. In the option 1, the capability report may indicate whether the terminal device 110 support simultaneous transmission of single TRP CG and single TRP DG.
The network device 110 may configure STxMP for CG and DG transmissions explicitly. The terminal device 110 may expect that: the CG and DG transmissions are associated with different SRS resource sets, respectively. In some embodiments, the association of the CG and DG transmissions with the SRS resource sets may be indicated or predefined. For example, the CG transmission may be associated with a first SRS resource set. In addition, the DG transmission may be associated with a second SRS resource set.
In some embodiments, for type 1 CG, the parameters srs-ResourceIndicator and precodingAndNumberOfLayers in RRC configuration (e.g., as described with respect to the flow 300) may be associated with the first SRS resource set.
In some embodiments, for type 2 CG, the “SRI” field and “TPMI” field in DCI for activation may be associated with the first SRS resource set.
In some embodiments, M-DCI may be employed. In such embodiments, the CG and DG transmissions may be associated with different TAGs and/or TAs, respectively. In addition, or alternatively, the CG and DG transmissions may be associated with CORESETs with different values of CORESETPoolIndex, respectively.
For the DG transmission starting at t+T, a value of one or more fields in UL-DCI to schedule this DG transmission may be set to avoid collision with the CG transmission. For example, the terminal device 110 may expect a coresetPoolIndex value of the CORESET where this DCI for the DG transmission is received is different from the coresetPoolIndex value of the CORESET associated with the CG transmission. For the “SRI” field in the UL-DCI, the terminal device 110 may expect a value indicating an SRS resource in a second SRS resource set, which is different from the first SRS resource set configured or indicated for the CG transmission. Accordingly, the “TPMI” field may be associated with the second SRS resource set.
In such embodiments, the M-DCI is employed. Accordingly, first BM-DCI and second BM-DCI can be indicated via CORESETs associated with two different values of CORESETPoolIndex, respectively. Each SRS resource set of the first and second SRS resource sets may be configured with an indication “followUnifiedTCIState” to indicate the TCI state to follow. The first SRS resource set may follow a TCI state update provided by first BM-DCI. In addition, the first SRS resource set and the first BM-DCI are associated with the same value of CORESETPoolIndex. The second SRS resource set may follow a TCI state update provided by second BM-DCI. In addition, the second SRS resource set and the second BM-DCI are associated with the same value of CORESETPoolIndex.
In some embodiments, S-DCI may be employed. In such embodiments, for the DG transmission starting at t+T, a value of one or more fields in UL-DCI to schedule this DG transmission may be set to avoid collision with the CG transmission. For example, the “SRI” field and the “TPMI” field may be associated with a second SRS resource set.
For BM-DCI with two TCI states mapped to a TCI field, each SRS resource set may be configured with an indication “followUnifiedTCIState” to indicate the TCI state to follow. The first SRS resource set may follow a TCI state update provided by first TCI state mapped to the TCI field. The second SRS resource set may follow a TCI state update provided by second TCI state mapped to the TCI field. In addition, the mapping between the SRS resource set and the TCI state can also be indicated.
As shown in FIG. 6, the time indexes t, t+T, and t+2+T may only suggest the starting time of respective transmissions, while the duration of the transmissions can be further configured or indicated. T may be the periodicity of the CG PUSCH.
In the traditional solution, if two SRS resource sets are configured, but only one set of power control parameters (e.g, pathlossReferenceIndex, p0-PUSCH-Alpha, powerControlLoopToUse) are provided for either CG PUSCH, it is assumed as single-TRP (S-TRP) transmission only associated with the first SRS resource set.
In contrast, in some embodiments of the present disclosure, since the DG and CG transmissions are associated with different SRS resource sets respectively and may be transmitted simultaneously, it is possible that one set of power control parameters configured in RRC for the CG transmission and another set of power control parameters may be provided only for DG transmission.
In one example, if the UE is provided STxMP-CGandDG, for PUSCH transmissions with a Type 1 configured grant, when two SRS resource sets are configured in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2, if configuredGrantConfig contains only one pathlossReferenceIndex, p0-PUSCH-Alpha, powerControlLoopToUse, srs-ResourceIndicator and precodingAndNumberOfLayers (applicable when higher layer parameter usage in SRS-ResourceSet set to ′codebook′ ) , PUSCH transmissions or repetitions are associated only with the SRS resource set as indicated in SRS_resource_set_index.
In one example, if the UE is provided STxMP-CGandDG, if the UE is provided two SRS resource sets in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2 with usage set to ′codebook′ or ′nonCodebook′ , and the UE is not provided p0-PUSCH-Alpha2 and powerControlLoopToUse2, for a retransmission of a configured grant Type 1 PUSCH, or for activation or retransmission of a configured grant Type 2 PUSCH, scheduled by a DCI format that includes an SRS resource set indicator field, the UE expects PUSCH transmissions or repetitions are associated only with the SRS resource set as indicated in SRS resource set indicator field.
Scenario 1 is described above. Alternatively, in some embodiments, the first parameter set may be associated with a first SRS resource set. Accordingly, during a duration that the first UL transmission is overlapped with the second UL transmission, the second parameter set is associated with the second SRS resource set. During a duration that the first UL transmission is not overlapped with the second UL transmission, the second parameter set is associated with at least one of the first and second SRS resource sets. In other words, the first UL transmission is associated with the first TRP 141 or the first panel 131, while the second UL transmission is configured with the MTRP STxMP with a capability of dynamic switching to S-TRP or single-panel. Such embodiments may be also referred to as scenario 2 or option 2.
Still take the CG transmission as an example of the first UL transmission and the DG transmission as an example of the second UL transmission. FIG. 7 illustrates an example scenario 700. As shown in FIG. 7, the DG transmission starting at t+T is overlapped with the CG transmission starting at t+T. In the example scenario 700, the CG transmission is associated with the first TRP 141 or via the first panel 131, while the DG transmission is configured with MTRP STxMP (e.g., SFN STxMP, SDM STxMP) with the capability of dynamic switching to S-TRP (or, single-panel) . In this option 2, the capability report from the terminal device 110 to the network device 120 may indicate whether the terminal device 110 support simultaneous transmission of single TRP CG and multi-TRP or STxMP DG.
To support the STxMP for the CG and DG transmissions, when the CG PUSCH (which starts at t+T) is transmitting to the first TRP 141 or via the first panel 13, the DG PUSCH (which starts at t+T) to the first TRP 141 or vie the first panel 131) should be avoided, for example, by switching back to S-TRP transmission.
In such embodiments, the CG transmission may be associated with one SRS resource set and the DG transmission may be associated with two SRS resource sets. The association may be indicated or predefined, e.g., the CG transmission may be associated with a first SRS resource set. As compared to the above option 1, the DG transmission is not tied to one SRS resource set, therefore improving flexibility.
In some embodiments, for type 1 CG, the parameters srs-ResourceIndicator and precodingAndNumberOfLayers in RRC configuration (e.g., as described with respect to the flow 300) may be associated with a first SRS resource set.
In some embodiments, for type 2 CG, the “SRI” field and “TPMI” field in DCI for activation may be associated with a first SRS resource set.
In some embodiments, M-DCI may be employed. In such embodiments, the CG transmission may be associated with a first TAG or a first TA. In addition, or alternatively, the CG transmission may be associated with a first CORESETPoolIndex value.
For the DG transmission starting at t+T, a value of one or more field in DCI format to schedule this DG transmission may be set to avoid collision with the CG transmission. For example, for the “SRI” field in the DCI format, the terminal device 110 may expect the value indicating an SRS resource in a second SRS resource set, which is different from the first SRS resource set configured or indicated for the CG transmission. The “TPMI” field may be associated with the second SRS resource set. In addition, the terminal device 110 may expect a coresetPoolIndex value of the CORESET where this DCI for the DG transmission is received is different from the coresetPoolIndex value of the CORESET associated with the CG transmission.
In some embodiments, S-DCI may be employed. In such embodiments, for the DG transmission starting at t+T, a value of one or more fields in DCI format to schedule this DG transmission may be set to avoid collision with the CG transmission.
For the “SRS resource set indicator” field, the terminal device 110 may expect the value indicating an S-TRP transmission, e.g., indicating a second SRS resource set, which is different from the first SRS resource set configured or indicated for the CG transmission. For example, the terminal device 110 may expect a value of “00” if the CG transmission is associated with SRS resource set 2. The terminal device 110 may expect a value of “01” if the CG transmission is associated with SRS resource set 1. Moreover, the terminal device 110 does not expect the values of “10” and “11” , which would mean STxMP is enabled for the DG transmission.
The “SRI 1” field and “TPMI 1” field may be associated with the SRS resource set as indicated via the “SRS resource set indicator” field (e.g., the second SRS resource set) . The “SRI 2” field and “TPMI 2” field may be reserved.
Alternatively, in some embodiments, during a duration that the first UL transmission is overlapped with the second UL transmission, the second UL transmission may be not expected. In other words, during the duration that the first UL transmission is overlapped with the second UL transmission, the second UL transmission may be dropped.
Continuing with the above example, if the terminal device 110 is configured with SFN STxMP for the DG transmission, the terminal device 110 may drop the transmission colliding with the CG transmission in spatial domain (i.e., via the same panel of the terminal device 110) . In this case, the “SRS resource set indicator” field may have any value and the “SRI 2” field and “TPMI 2” fields may be also associated with the SRS resource set as indicated via the “SRS resource set indicator” field.
Alternatively, in some embodiments, the first parameter set may be associated with a first SRS resource set and a second SRS resource set, and the first UL transmission may be configured with a time division multiplexing (TDM) scheme. During a duration that the first UL transmission is overlapped with the second UL transmission, the first and second parameter sets may be associated with different SRS resource sets. Such embodiments may be also referred to as scenario 3 or option 3.
Still take the CG transmission as an example of the first UL transmission and the DG transmission as an example of the second UL transmission. FIG. 8 illustrates an example scenario 800. As shown in FIG. 8, the DG transmission starting at t+T is overlapped with the CG transmission starting at t+T and the CG transmission starting at t+T+τ. In the example scenario 800, the CG transmission is configured with MTRP (e.g., CG based PUSCH TDM repetition, SFN STxMP, SDM STxMP) , and the DG transmission is configured with MTRP STxMP (e.g., SFN STxMP, SDM STxMP) with the capability of dynamic switching to STRP. In this option 3, the capability report from the terminal device 110 to the network device 120 may indicate whether the terminal device 110 support simultaneous transmission of multi-TRP or STxMP CG and multi-TRP or STxMP DG.
To support STxMP for CG and DG transmissions, when the CG PUSCH starting at t+T and t+T+τ is transmitting to one TRP, the DG transmission to that TRP should be avoided, for example, by switching back to S-TRP transmission to the other TRP.
In such embodiments, both the CG and DG transmission may be associated with two SRS resource sets. As compared to option 1 and option 2, the CG transmission is not tied to one SRS resource set, therefore improving flexibility.
In some embodiments, for type 1 CG, RRC configuration (e.g., as described with respect to the flow 300) may include a first parameter set and a second parameter set which may be associated with a first SRS resource set and a second SRS resource set, respectively.
In some embodiments, for type 2 CG, the “SRS resource set indicator” field (if any) in DCI for activation may indicate a first SRS resource set and a second SRS resource set. Alternatively, the SRS resource set may be determined based on the coresetPoolIndex value of the CORESET receiving the activation DCI for this CG. The “SRI” field and “TPMI” field may be associated with a first SRS resource set, and the “SRI2” field and “TPMI2” field may be associated with a second SRS resource set.
If the CG transmission is configured with an SFN scheme or an SDM scheme, the terminal device 110 may not expect a DG transmission to be scheduled within the duration of the CG transmissions starting at t+T. In some embodiment, if the CG transmission is configured with a lower priority than the DG transmission, the terminal device 110 may not expect to perform the CG transmission starting at t+T.
If the CG transmission is configured with a TDM scheme, the DG transmission may be switched back to S-TRP transmission, which is similar as in Option 2. For example, the repetition for the TDM scheme is 2, and an offset between the first and second transmission occasion is τ, as shown in FIG. 8. The DG transmission starting at t+T may be performed by using the second panel 132 and the DG transmission starting at t+T+τ may be performed by using the first panel 131.
In some embodiments, M-DCI may be employed. For the DG transmission starting at t+T, a value of one or more field in DCI to schedule this DG transmission may be set to avoid collision with the CG transmission. For example, for the “SRI” field in the DCI, the terminal device 110 may expect the value indicating an SRS resource in a second SRS resource set, which is different from the first SRS resource set configured or indicated for the CG transmission. The “TPMI” field may be associated with the second SRS resource set. In addition, the terminal device 110 may expect a coresetPoolIndex value of the CORESET where this DCI for the DG transmission is received is different from the coresetPoolIndex value of the CORESET associated with the CG transmission.
In some embodiments, S-DCI may be employed. In such embodiments, for the DG transmission starting at t+T, a value of one or more fields in DCI to schedule this DG transmission may be set to avoid collision with the CG transmission.
For the “SRS resource set indicator” field, the terminal device 110 may expect the value indicating an S-TRP transmission, e.g., indicating a second SRS resource set, which is different from the first SRS resource set configured or indicated for the CG transmission. For example, the terminal device 110 may expect a value of “00” if the CG transmission is associated with SRS resource set 2. The terminal device 110 may expect a value of “01” if the CG transmission is associated with SRS resource set 1. Moreover, the terminal device 110 does not expect the values of “10” and “11” .
The “SRI 1” field and “TPMI 1” field may be associated with the SRS resource set as indicated via the “SRS resource set indicator” field (e.g., the second SRS resource set) . The “SRI 2” field and “TPMI 2” field may be reserved.
Alternatively, in some embodiments, if the terminal device 110 is configured with SFN STxMP for the DG transmission, the terminal device 110 may drop the transmission colliding with the CG transmission in spatial domain (i.e., via the same panel of the terminal device 110) . In this case, the “SRS resource set indicator” field may have any value and the “SRI 2” field and “TPMI 2” fields may be also associated with the SRS resource set as indicated via the “SRS resource set indicator” field.
Some embodiments are described above. Some examples are described now.
In one example, a UE is not expected to be scheduled by a PDCCH ending in symbol i to transmit a PUSCH on a given serving cell overlapping in time with a transmission occasion, where the UE is allowed to transmit a PUSCH with configured grant, starting in a symbol j on the same serving cell if the end of symbol i is not at least N₂ symbols before the beginning of symbol j, if the UE is not provided prioLowDG-HighCG or prioHighDG-LowCG, or the UE is provided prioLowDG-HighCG or prioHighDG-LowCG, or if the UE is not provided STxMP-CGandDG and the two PUSCHs have the same priority index. The value N₂ in symbols is determined according to the UE processing capability, and N₂ and the symbol duration are based on the minimum of the subcarrier spacing corresponding to the PUSCH with configured grant and the subcarrier spacing of the PDCCH scheduling the PUSCH.
In one example, for each Serving Cell and each configured uplink grant, if configured and activated, the MAC entity shall:
1> if the PUSCH duration of the configured uplink grant does not overlap with the PUSCH duration of an uplink grant received on the PDCCH associated with the same SRS resource set as the configured uplink grant and STxMP-CGandDG is configured for this Serving Cell:
1> if the PUSCH duration of the configured uplink grant does not overlap with the PUSCH duration of another configured uplink grant associated with the same SRS resource set as the configured uplink grant and STxMP-CGandCG is configured for this Serving Cell:
2> set the HARQ Process ID to the HARQ Process ID associated with this PUSCH duration;
2> if the configuredGrantTimer for the corresponding HARQ process is not running:
3> consider the NDI bit for the corresponding HARQ process to have been toggled;
3> deliver the configured uplink grant and the associated HARQ information to the HARQ entity.
As mentioned above, the scenarios described with respect to the STxMP for CG and DG transmissions may be applicable to STxMP for two CG transmissions and STxMP for two DG transmissions. Therefore, a more general signaling STxMP-PUSCH can be provided.
In one example, except the UE is provided STxMP-PUSCH, for any HARQ process ID (s) in a given scheduled cell, the UE is not expected to transmit a PUSCH that overlaps in time with another PUSCH.
In one example, if the UE is provided STxMP-PUSCH, for any HARQ process ID (s) in a given scheduled cell, the UE can transmit a PUSCH that overlaps in time with another PUSCH.
In one example, except the UE is provided STxMP-PUSCH, for any two HARQ process IDs in a given scheduled cell, if the UE is scheduled to start a first PUSCH transmission starting in symbol j by a PDCCH ending in symbol i on a scheduling cell, , the UE is not expected to be scheduled to transmit a PUSCH starting earlier than the end of the first PUSCH by a PDCCH that ends later than symbol i of the scheduling cell.
In one example, if the UE is provided STxMP-PUSCH, for any two HARQ process IDs in a given scheduled cell, if the UE is scheduled to start a first PUSCH transmission starting in symbol j by a PDCCH ending in symbol i on a scheduling cell, the UE can be scheduled to transmit a PUSCH starting earlier than the end of the first PUSCH by a PDCCH that ends later than symbol i of the scheduling cell.
In the embodiments described above, the STxMP PUSCH transmissions at the same time can be supported. In this way, scheduling flexibility can be enhanced, and latency can be reduced.
Example handling in the case of different TAs
As mentioned above, in some cases, the UL transmissions may be associated with two different TAs or TAGs. To this end, the overlapping of the UL transmissions (for example, a CG transmission and a DG transmission) needs to be handled in the case of two or more TAs or TAGs.
Reference is made to FIG. 9, which illustrates a signaling flow 900 of handling in the case of different TAs in accordance with some embodiments of the present disclosure. For the purposes of discussion, the signaling flow 900 will be discussed with reference to FIG. 1, for example, by using the terminal device 110 and the network device 120.
The network device 120 transmits 905, to the terminal device 110, first configuration information for a first UL transmission. The first UL transmission is associated with a first TAG or a first TA.
The network device 120 transmits 910, to the terminal device 110, second configuration information for a second UL transmission. The second UL transmission is associated with a second TAG or a second TA. The second uplink transmission is not overlapped with the first uplink transmission in a first duration. The first duration is associated with: a second duration of the first UL transmission, and a third duration associated with a first difference between the first TAG and the second TAG or between the first TA and the second TA. In other words, the duration within which the second UL transmission shall not be performed depends on a duration of the first UL transmission and the difference between the two TAs.
The effect of 2 TAs may be related to define the overlapping by considering the TA difference between the TA for the first UL transmission and the TA for the second UL transmission. For a terminal device which does not support STxMP for the UL transmission (for example, PUSCH transmissions) , the time duration occupied by the first UL transmission (e.g., a higher priority, the CG transmission, etc. ) should be added with at least one symbol duration.
Still take the CG transmission as an example of the first UL transmission and the DG transmission as an example of the second UL transmission. FIG. 10A illustrates a schematic diagram of timing of uplink transmissions without considering the TA difference in accordance with some embodiments of the present disclosure. As shown, the grant of the DG transmission is received at the symbol i. The PUSCH processing capability is denoted as N₂. The DG transmission is to start at the symbol j. Without considering the TA difference between the CG transmission and the DG transmission, the DG transmission shall not be performed within the time duration 1001 with a CG transmission occasion.
In some embodiments, to avoid the overlapping with the first UL transmission, the second UL transmission may be scheduled based at least in part on: the third duration, a time point (for example, the symbol i) of receiving a grant of the second UL transmission, or a fourth duration from the time point of receiving a grant of the UL uplink transmission to a further time point (for example, the symbol j) of performing the second UL transmission.
FIG. 10B illustrates a schematic diagram of timing of uplink transmissions considering the TA difference in accordance with some embodiments of the present disclosure. If the CG transmission is associated with a TAG with a larger TA value (or the TAG with an earlier DL reference timing) , which means that the CG transmission occasion may start advance in time than the configured time point, as seen from the DG UL-DCI perspective. On the other hand, if the CG transmission is associated with a TAG with a smaller TA value (or the TAG with a later DL reference timing) , the end of CG transmission occasion may be delayed in time than configured stating time point plus the duration of the CG transmission. Accordingly, an extended time duration 1002 with a CG transmission occasion may be determined, as shown in FIG. 10B. Therefore, the DG transmission shall not be performed within the extended time duration 1002.
To avoid overlapping with the CG transmission, the DG transmission starting at symbol j may need to be replaced with a DG transmission starting at symbol j- (|TA2-TA1 |in symbols) . The max value of |TA2-TA1| may be less than one symbol duration. In this case, j-1 may be used. Further, to make it more general, j ± T can be considered as the starting time of the DG transmission, where T is related to the TA difference of two TAGs.
Alternatively, or in addition, the end of CG transmission occasion can be extended to have an equivalent effect. Alternatively, or in addition, the PUSCH processing capability N₂ be extended to have an equivalent effect, e.g., defining N₂ ± T. In some other examples, it is equivalent to extend UE PUSCH preparation procedure time Tproc.
In some embodiments, the first UL transmission may be associated with a first timing reference, and the second UL transmission may be associated with a second timing reference. The second UL transmission may be scheduled based at least in part on a second difference between the first timing reference and the second timing reference.
Continuing with the example of FIG. 10B, two DL timing references may be allowed for 2-TA operation. As a result, the symbol i and the symbol j may correspond to a DL symbol and a UL symbol with respect to different DL reference timing, which may cause a difference of T symbol. Such a difference can also be solved by further defining UL symbol j as UL symbol j ± T as above.
Although the above embodiments are described with respect the CG and DG transmission, this is merely an example without any limitation. The principle and concept described above are not limited to overlapping between a CG transmission and a DG transmission, but in general can be applied for STxMP for UL transmissions.
In this way, overlapping caused by different TAs can be handled.
Some more examples are described below.
In one example, except the UE is provided STxMP-PUSCH, For any two HARQ process IDs in a given scheduled cell, if the UE is scheduled to start a first PUSCH transmission starting in symbol j by a PDCCH ending in symbol i on a scheduling cell, , the UE is not expected to be scheduled to transmit a PUSCH starting earlier than T symbol after the end of the first PUSCH by a PDCCH that ends later than symbol i of the scheduling cell.
In some other examples, the symbol j may be changed to j ± T, where T is related to the TA difference of the two TAGs in a cell, or a DL timing reference difference of the two TAGs in a cell.
For example, a UE is not expected to be scheduled by a PDCCH ending in symbol i to transmit a PUSCH on a given serving cell overlapping in time with a transmission occasion, where the UE is allowed to transmit a PUSCH with configured grant, starting in a symbol j ± T on the same serving cell if the end of symbol i is not at least N₂ symbols before the beginning of symbol j± T, if the UE is not provided prioLowDG-HighCG or prioHighDG-LowCG, or the UE is provided prioLowDG-HighCG or prioHighDG-LowCG and the two PUSCHs have the same priority index. The value N₂ in symbols is determined according to the UE processing capability defined in Clause 6.4, and N₂ and the symbol duration are based on the minimum of the subcarrier spacing corresponding to the PUSCH with configured grant and the subcarrier spacing of the PDCCH scheduling the PUSCH.
In one example, a UE is not expected to be scheduled by a PDCCH ending in symbol i to transmit a PUSCH on a given serving cell for a given HARQ process, if there is a transmission occasion where the UE is allowed to transmit a PUSCH with configured grant with the same HARQ process on the same serving cell starting in a symbol j ± T after symbol i, and if the gap between the end of PDCCH and the beginning of symbol j ± T is less than N₂ symbols. The value N₂ in symbols is determined according to the UE processing capability, and N₂ and the symbol duration are based on the minimum of the subcarrier spacing corresponding to the PUSCH with configured grant and the subcarrier spacing of the PDCCH scheduling the PUSCH.
Example methods and devices
FIG. 11 illustrates a flowchart of a communication method 1100 implemented at a terminal device 110 in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 1100 will be described from the perspective of the terminal device 110 in FIG. 1.
At block 1110, the terminal device 110 receives, from a network device 120, configuration information for uplink transmissions associated with a first sounding reference signal (SRS) resource set and a second SRS resource set. The configuration information indicates: a first parameter set and a second parameter set to be used for the uplink transmissions, a first indication indicating a simultaneous transmission scheme of the uplink transmissions, and a mapping information. The mapping information indicates at least one of the following: correspondence between the first and second parameter sets and the first and second SRS resource sets, or a combination of the number of layers associated with the first and second parameter sets.
At block 1120, the terminal device 110 determines, based at least in part on the first indication and the mapping information, the first and second parameter set associated with the first and second SRS resource sets, respectively.
At block 1130, the terminal device 110 performs, based on the first and second parameter sets, the uplink transmissions with a network device 120.
In some example embodiments, any of the first and second parameter sets comprises at least one of the following: at least one parameter used for power control, an SRS resource indicator, precoding information, a number of layers, an identity of a control response set, or an identity of a timing advance group (TAG) .
In some example embodiments, the mapping information indicates the correspondence by one of the following: a first value indicating that the first parameter set is associated with the first SRS resource set and the second parameter set is invalid, a second value indicating that the first parameter set is associated with the second SRS resource set and the second parameter set is invalid, a third value indicating that the first parameter set is associated with the first SRS resource set and the second parameter set is associated with the second SRS resource set, or a fourth value indicating that the first parameter set is associated with the second SRS resource set and the second parameter set is associated with the first SRS resource set.
In some example embodiments, the mapping information indicates the combination by one of the following: a fifth value indicating that the first parameter set is associated with a first number of layers and the second parameter set is associated with a second number of layers, a sixth value indicating that the first parameter set is associated with the second number of layers and the second parameter set is associated with the first number of layers, a seventh value indicating that both the first and second parameter sets are associated with the first number of layers, or an eighth value indicating both the first and second parameter set are associated with the second number of layers.
In some example embodiments, the mapping information indicates the correspondence and the combination by one of the following: a ninth value indicating that the first parameter set is associated with the first SRS resource set and a first number of layers, and the second parameter set is associated with the second SRS resource set and a second number of layers, a tenth value indicating that the first parameter set is associated with the first SRS resource set and a second number of layers, and the second parameter set is associated with the second SRS resource set and the first number of layers, an eleventh value indicating that the first parameter set is associated with the second SRS resource set and the first number of layers, and the second parameter set is associated with the first SRS resource set and the second number of layers, or a twelfth value indicating that the first parameter set is associated with the second SRS resource set and the second number of layers, and the second parameter set is associated with the first SRS resource set and the first number of layers.
In some example embodiments, the mapping information is indicated by an SRS resource set indication.
In some example embodiments, the combination is indicated separately from or jointly with the correspondence.
In some example embodiments, the combination of the number of layers is indicated by at least one of the following: a first number of layers and a second number of layers, the first number of layers and a total number of layers of the combination, or the first number of layers and an indication indicating whether the second number of layers is the same with or different from the first number of layers.
In some example embodiments, the terminal device 110 further determines, according to a first portion of a first pre-defined look-up table, a first value of a first SRS resource indicator (SRI) . Moreover, the terminal device 110 determines, according to a second portion of a first pre-defined look-up table, a second value of a second SRI. The second portion is the same with or different from the first portion and determined based on the first value, the first indication and the mapping information.
In some example embodiments, the terminal device 110 further determines, according to a first portion of a second pre-defined look-up table, a third value of a first transmit precoding matrix indicator (TPMI) . Furthermore, the terminal device 110 determines, according to a second portion of a second pre-defined look-up table, a fourth value of a second TPMI. The second portion is the same with or different from the first portion and determined based on the third value, the first indication and the mapping information.
In some example embodiments, the first and second parameter sets are associated with a single configuration.
In some example embodiments, the first parameter set is associated with a first configuration and the second parameter set is associated with a second configuration. The configuration information further indicates an association between the first configuration and the second configuration.
In some example embodiments, the simultaneous transmission scheme is a space division multiplexing (SDM) scheme or a single frequency network (SFN) scheme.
In some example embodiments, the uplink transmissions are one of the following: dynamic grant (DG) uplink transmissions, configured grant (CG) uplink transmissions with a first type, or CG uplink transmissions with a second type.
FIG. 12 illustrates a flowchart of a communication method 1200 implemented at a terminal device 110 in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 1200 will be described from the perspective of the terminal device 110 in FIG. 1.
At block 1210, the terminal device 110 receives, from a network device 120, configuration information indicating: a first configuration of a first uplink transmission, a second configuration of a second uplink transmission. The first configuration indicates a first parameter set. The second configuration indicates a second parameter set determined based at least in part on the first parameter set. The second uplink transmission is at least partly overlapped with the first uplink transmission during a duration.
At block 1220, the terminal device 110 performs, based on the first and second parameter sets, the first and second uplink transmissions simultaneously during the duration.
In some example embodiments, the first uplink transmission is a configured grant (CG) uplink transmission and the second uplink transmission is a dynamic grant (DG) uplink transmission.
In some example embodiments, the first and second configurations are associated with different control recourse sets (CORSETs) and/or different timing advance group (TAG) .
In some example embodiments, the first parameter set is associated with a first sounding reference signal (SRS) resource set, and the second parameter set is associated with a second SRS resource set.
In some example embodiments, the first parameter set is associated with a first sounding reference signal (SRS) resource set. During a duration that the first uplink transmission is overlapped with the second uplink transmission, the second parameter set is associated with the second SRS resource set. During a duration that the first uplink transmission is not overlapped with the second uplink transmission, the second parameter set is associated with at least one of the first and second SRS resource sets.
In some example embodiments, the first parameter set is associated with a first sounding reference signal (SRS) resource set and a second SRS resource set. The first uplink transmission is configured with a simultaneous transmission scheme. During a duration that the first uplink transmission is overlapped with the second uplink transmission, the second uplink transmission is not expected.
In some example embodiments, the first parameter set is associated with a first sounding reference signal (SRS) resource set and a second SRS resource set. The first uplink transmission is configured with a time division multiplexing (TDM) scheme. During a duration that the first uplink transmission is overlapped with the second uplink transmission, the first and second parameter sets are associated with different SRS resource sets.
FIG. 13 illustrates a flowchart of a communication method 1300 implemented at a terminal device 110 in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 1300 will be described from the perspective of the terminal device 110 in FIG. 1.
At block 1310, the terminal device 110 receives, from a network device 120, first configuration information for a first uplink transmission. The first uplink transmission is associated with a first timing advance group (TAG) .
At block 1320, the terminal device 110 receives, from the network device 120, second configuration information for a second uplink transmission. The second uplink transmission is associated with a second TAG. The second uplink transmission is not overlapped with the first uplink transmission in a first duration. The first duration is associated with a second duration of the first uplink transmission and a third duration associated with a first difference between the first TAG and the second TAG.
At block 1330, the terminal device 110 performs, with the network device 120, the first and second uplink transmissions based at least in part on the first and second configuration information, respectively.
In some example embodiments, the second uplink transmission is scheduled based at least in part on: the third duration, a time point of receiving a grant of the second uplink transmission, or a fourth duration from the time point of receiving a grant of the second uplink transmission to a further time point of performing the second uplink transmission.
In some example embodiments, the first uplink transmission is associated with a first timing reference. The second uplink transmission is associated with a second timing reference. The second uplink transmission is scheduled based at least in part on a second difference between the first timing reference and the second timing reference.
FIG. 14 illustrates a flowchart of a communication method 1400 implemented at a network device 120 in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 1400 will be described from the perspective of the network device 120 in FIG. 1.
At block 1410, the network device 120 transmits, to a terminal device 110, configuration information for uplink transmissions associated with a first sounding reference signal (SRS) resource set and a second SRS resource set. The configuration information indicates: a first parameter set and a second parameter set to be used for the uplink transmissions, a first indication indicating a simultaneous transmission scheme of the uplink transmissions, and a mapping information. The mapping information indicates at least one of the following: correspondence between the first and second parameter sets and the first and second SRS resource sets, or a combination of the number of layers associated with the first and second parameter sets.
At block 1420, the network device 120 receives the uplink transmissions from the terminal device 110.
In some example embodiments, any of the first and second parameter sets comprises at least one of the following: at least one parameter used for power control, an SRS resource indicator, precoding information, a number of layers, an identity of a control response set, or an identity of a timing advance group (TAG) .
In some example embodiments, the mapping information indicates the correspondence by one of the following: a first value indicating that the first parameter set is associated with the first SRS resource set and the second parameter set is invalid, a second value indicating that the first parameter set is associated with the second SRS resource set and the second parameter set is invalid, a third value indicating that the first parameter set is associated with the first SRS resource set and the second parameter set is associated with the second SRS resource set, or a fourth value indicating that the first parameter set is associated with the second SRS resource set and the second parameter set is associated with the first SRS resource set.
In some example embodiments, the mapping information indicates the combination by one of the following: a fifth value indicating that the first parameter set is associated with a first number of layers and the second parameter set is associated with a second number of layers, a sixth value indicating that the first parameter set is associated with the second number of layers and the second parameter set is associated with the first number of layers, a seventh value indicating that both the first and second parameter sets are associated with the first number of layers, or an eighth value indicating that both the first and second parameter set are associated with the second number of layers.
In some example embodiments, the mapping information indicates the correspondence and the combination by one of the following: a ninth value indicating that the first parameter set is associated with the first SRS resource set and a first number of layers, and the second parameter set is associated with the second SRS resource set and a second number of layers, a tenth value indicating that the first parameter set is associated with the first SRS resource set and a second number of layers, and the second parameter set is associated with the second SRS resource set and the first number of layers, an eleventh value indicating that the first parameter set is associated with the second SRS resource set and the first number of layers, and the second parameter set is associated with the first SRS resource set and the second number of layers, or a twelfth value indicating that the first parameter set is associated with the second SRS resource set and the second number of layers, and the second parameter set is associated with the first SRS resource set and the first number of layers.
In some example embodiments, the mapping information is indicated by an SRS resource set indication.
In some example embodiments, the combination of the number of layers is indicated separately from the correspondence and or jointly with the correspondence.
In some example embodiments, the combination of the number of layers is indicated by at least one of the following: a first number of layers and a second number of layers, the first number of layers and a total number of layers of the combination, or the first number of layers and an indication indicating whether the second number of layers is the same with or different from the first number of layers.
In some example embodiments, the first and second parameter sets are associated with a single configuration.
In some example embodiments, the first parameter set is associated with a first configuration. The second parameter set is associated with a second configuration. The configuration information further indicates an association between the first configuration and the second configuration.
In some example embodiments, the simultaneous transmission scheme is a space division multiplexing (SDM) scheme or a single frequency network (SFN) scheme.
In some example embodiments, the uplink transmissions are one of the following: dynamic grant (DG) uplink transmissions, configured grant (CG) uplink transmissions with a first type, or CG uplink transmissions with a second type.
FIG. 15 illustrates a flowchart of a communication method 1500 implemented at a network device 120 in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 1500 will be described from the perspective of the network device 120 in FIG. 1.
At block 1510, the network device 120 transmits, to a terminal device 110, configuration information indicating: a first configuration of a first uplink transmission, a second configuration of a second uplink transmission. The first configuration indicates a first parameter set during a duration. The second configuration indicates a second parameter set determined based at least in part on the first parameter set. The second uplink transmission is at least partly overlapped with the first uplink transmission during the duration.
At block 1520, the network device 120 receives the first and second uplink transmissions simultaneously.
In some example embodiments, the first uplink transmission is a configured grant (CG) uplink transmission and the second uplink transmission is a dynamic grant (DG) uplink transmission.
In some example embodiments, the first and second configurations are associated with different control recourse sets (CORSETs) and/or different timing advance group (TAG) .
In some example embodiments, the first parameter set is associated with a first sounding reference signal (SRS) resource set, and the second parameter set is associated with a second SRS resource set.
In some example embodiments, the first parameter set is associated with a first sounding reference signal (SRS) resource set. During a duration that the first uplink transmission is overlapped with the second uplink transmission, the second parameter set is associated with the second SRS resource set. During a duration that the first uplink transmission is not overlapped with the second uplink transmission, the second parameter set is associated with at least one of the first and second SRS resource sets.
In some example embodiments, the first parameter set is associated with a first sounding reference signal (SRS) resource set and a second SRS resource set. The first uplink transmission is configured with a simultaneous transmission scheme. During a duration that the first uplink transmission is overlapped with the second uplink transmission, the second uplink transmission is not expected.
In some example embodiments, the first parameter set is associated with a first sounding reference signal (SRS) resource set and a second SRS resource set. The first uplink transmission is configured with a time division multiplexing (TDM) scheme. During a duration that the first uplink transmission is overlapped with the second uplink transmission, the first and second parameter sets are associated with different SRS resource sets.
FIG. 16 illustrates a flowchart of a communication method 1600 implemented at a network device 120 in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 1600 will be described from the perspective of the network device 120 in FIG. 1.
At block 1610, the network device 120 transmits, to a terminal device 110, first configuration information for a first uplink transmission. The first uplink transmission is associated with a first timing advance group (TAG) .
At block 1620, the network device 120 transmits, to the terminal device 110, second configuration information for a second uplink transmission. The second uplink transmission is associated with a second TAG. The second uplink transmission is not overlapped with the first uplink transmission in a first duration. The first duration being associated with: a second duration of the first uplink transmission, and a third duration associated with a first difference between the first TAG and the second TAG.
At block 1630, the network device 120 receives, from the terminal device 110, the first and second uplink transmissions based at least in part on the first and second configuration information, respectively.
In some example embodiments, the second uplink transmission is scheduled based at least in part on: the third duration, a time point of receiving a grant of the second uplink transmission, or a fourth duration from the time point of receiving a grant of the second uplink transmission to a further time point of performing the second uplink transmission.
In some example embodiments, the first uplink transmission is associated with a first timing reference. The second uplink transmission is associated with a second timing reference. The second uplink transmission is scheduled based at least in part on a second difference between the first timing reference and the second timing reference.
FIG. 17 is a simplified block diagram of a device 1700 that is suitable for implementing embodiments of the present disclosure. The device 1700 can be considered as a further example implementation of any of the devices as shown in FIG. 1. Accordingly, the device 1700 can be implemented at or as at least a part of the terminal device 110 or the network device 120.
As shown, the device 1700 includes a processor 1710, a memory 1720 coupled to the processor 1710, a suitable transmitter (TX) /receiver (RX) 1740 coupled to the processor 1710, and a communication interface coupled to the TX/RX 1740. The memory 1710 stores at least a part of a program 1730. The TX/RX 1740 is for bidirectional communications. The TX/RX 1740 has at least one antenna to facilitate communication, though in practice an Access Node mentioned in this application may have several ones. The communication interface may represent any interface that is necessary for communication with other network elements, such as X2/Xn interface for bidirectional communications between eNBs/gNBs, S1/NG interface for communication between a Mobility Management Entity (MME) /Access and Mobility Management Function (AMF) /SGW/UPF and the eNB/gNB, Un interface for communication between the eNB/gNB and a relay node (RN) , or Uu interface for communication between the eNB/gNB and a terminal device.
The program 1730 is assumed to include program instructions that, when executed by the associated processor 1710, enable the device 1700 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to FIGS. 3 to 16. The embodiments herein may be implemented by computer software executable by the processor 1710 of the device 1700, or by hardware, or by a combination of software and hardware. The processor 1710 may be configured to implement various embodiments of the present disclosure. Furthermore, a combination of the processor 1710 and memory 1720 may form processing means 1750 adapted to implement various embodiments of the present disclosure.
The memory 1720 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology, such as a non-transitory computer readable storage medium, semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. While only one memory 1720 is shown in the device 1700, there may be several physically distinct memory modules in the device 1700. The processor 1710 may be of any type suitable to the local technical network, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples. The device 1700 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
According to embodiments of the present disclosure, a terminal device comprising a circuitry is provided. The circuitry is configured to: receive, from a network device, configuration information for uplink transmissions associated with a first sounding reference signal (SRS) resource set and a second SRS resource set, the configuration information indicating: a first parameter set and a second parameter set to be used for the uplink transmissions, a first indication indicating a simultaneous transmission scheme of the uplink transmissions, and a mapping information indicating at least one of the following: correspondence between the first and second parameter sets and the first and second SRS resource sets, or a combination of the number of layers associated with the first and second parameter sets; determine, based at least in part on the first indication and the mapping information, the first and second parameter set associated with the first and second SRS resource sets, respectively; and perform, based on the first and second parameter sets, the uplink transmissions with a network device. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the terminal device as discussed above.
According to embodiments of the present disclosure, a terminal device comprising a circuitry is provided. The circuitry is configured to: receive, from a network device, configuration information indicating: a first configuration of a first uplink transmission, the first configuration indicating a first parameter set, a second configuration of a second uplink transmission, the second configuration indicating a second parameter set determined based at least in part on the first parameter set, the second uplink transmission being at least partly overlapped with the first uplink transmission during a duration; and perform, based on the first and second parameter sets, the first and second uplink transmissions simultaneously during the duration. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the terminal device as discussed above.
According to embodiments of the present disclosure, a terminal device comprising a circuitry is provided. The circuitry is configured to: receive, from a network device, first configuration information for a first uplink transmission, the first uplink transmission being associated with a first timing advance group (TAG) ; receive, from the network device, second configuration information for a second uplink transmission, the second uplink transmission being associated with a second TAG, wherein the second uplink transmission is not overlapped with the first uplink transmission in a first duration, the first duration being associated with: a second duration of the first uplink transmission, and a third duration associated with a first difference between the first TAG and the second TAG; and perform, with the network device, the first and second uplink transmissions based at least in part on the first and second configuration information, respectively. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the terminal device as discussed above.
According to embodiments of the present disclosure, a network device comprising a circuitry is provided. The circuitry is configured to: transmit, to a terminal device, configuration information for uplink transmissions associated with a first sounding reference signal (SRS) resource set and a second SRS resource set, the configuration information indicating: a first parameter set and a second parameter set to be used for the uplink transmissions, a first indication indicating a simultaneous transmission scheme of the uplink transmissions, and a mapping information indicating at least one of the following: correspondence between the first and second parameter sets and the first and second SRS resource sets, or a combination of the number of layers associated with the first and second parameter sets; and receive the uplink transmissions from the terminal device. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the network device as discussed above.
According to embodiments of the present disclosure, a network device comprising a circuitry is provided. The circuitry is configured to: transmit, to a terminal device, configuration information indicating: a first configuration of a first uplink transmission, the first configuration indicating a first parameter set during a duration, a second configuration of a second uplink transmission, the second configuration indicating a second parameter set determined based at least in part on the first parameter set, the second uplink transmission being at least partly overlapped with the first uplink transmission during the duration; and receive the first and second uplink transmissions simultaneously. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the network device as discussed above.
According to embodiments of the present disclosure, a network device comprising a circuitry is provided. The circuitry is configured to: transmit, to a terminal device, first configuration information for a first uplink transmission, the first uplink transmission being associated with a first timing advance group (TAG) ; transmit, to the terminal device, second configuration information for a second uplink transmission, the second uplink transmission being associated with a second TAG, wherein the second uplink transmission is not overlapped with the first uplink transmission in a first duration, the first duration being associated with: a second duration of the first uplink transmission, and a third duration associated with a first difference between the first TAG and the second TAG; and receive, from the terminal device, the first and second uplink transmissions based at least in part on the first and second configuration information, respectively. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the network device as discussed above.
The term “circuitry” used herein may refer to hardware circuits and/or combinations of hardware circuits and software. For example, the circuitry may be a combination of analog and/or digital hardware circuits with software/firmware. As a further example, the circuitry may be any portions of hardware processors with software including digital signal processor (s) , software, and memory (ies) that work together to cause an apparatus, such as a terminal device or a network device, to perform various functions. In a still further example, the circuitry may be hardware circuits and or processors, such as a microprocessor or a portion of a microprocessor, that requires software/firmware for operation, but the software may not be present when it is not needed for operation. As used herein, the term circuitry also covers an implementation of merely a hardware circuit or processor (s) or a portion of a hardware circuit or processor (s) and its (or their) accompanying software and/or firmware.
In summary, embodiments of the present disclosure provide the following aspects.
In an aspect, it is proposed a terminal device comprising: a processor configured to cause the terminal device to: receive, from a network device, configuration information for uplink transmissions associated with a first sounding reference signal (SRS) resource set and a second SRS resource set, the configuration information indicating: a first parameter set and a second parameter set to be used for the uplink transmissions, a first indication indicating a simultaneous transmission scheme of the uplink transmissions, and a mapping information indicating at least one of the following: correspondence between the first and second parameter sets and the first and second SRS resource sets, or a combination of the number of layers associated with the first and second parameter sets; determine, based at least in part on the first indication and the mapping information, the first and second parameter set associated with the first and second SRS resource sets, respectively; and perform, based on the first and second parameter sets, the uplink transmissions with a network device.
In some embodiments, any of the first and second parameter sets comprises at least one of the following: at least one parameter used for power control, an SRS resource indicator, precoding information, a number of layers, an identity of a control response set, or an identity of a timing advance group (TAG) .
In some embodiments, the mapping information indicates the correspondence by one of the following: a first value indicating that the first parameter set is associated with the first SRS resource set and the second parameter set is invalid, a second value indicating that the first parameter set is associated with the second SRS resource set and the second parameter set is invalid, a third value indicating that the first parameter set is associated with the first SRS resource set and the second parameter set is associated with the second SRS resource set, or a fourth value indicating that the first parameter set is associated with the second SRS resource set and the second parameter set is associated with the first SRS resource set.
In some embodiments, the mapping information indicates the combination by one of the following: a fifth value indicating that the first parameter set is associated with a first number of layers and the second parameter set is associated with a second number of layers, a sixth value indicating that the first parameter set is associated with the second number of layers and the second parameter set is associated with the first number of layers, a seventh value indicating that both the first and second parameter sets are associated with the first number of layers, or an eighth value indicating both the first and second parameter set are associated with the second number of layers.
In some embodiments, the mapping information indicates the correspondence and the combination by one of the following: a ninth value indicating that the first parameter set is associated with the first SRS resource set and a first number of layers, and the second parameter set is associated with the second SRS resource set and a second number of layers, a tenth value indicating that the first parameter set is associated with the first SRS resource set and a second number of layers, and the second parameter set is associated with the second SRS resource set and the first number of layers, an eleventh value indicating that the first parameter set is associated with the second SRS resource set and the first number of layers, and the second parameter set is associated with the first SRS resource set and the second number of layers, or a twelfth value indicating that the first parameter set is associated with the second SRS resource set and the second number of layers, and the second parameter set is associated with the first SRS resource set and the first number of layers.
In some embodiments, the mapping information is indicated by an SRS resource set indication.
In some embodiments, the combination is indicated separately from or jointly with the correspondence.
In some embodiments, the combination of the number of layers is indicated by at least one of the following: a first number of layers and a second number of layers, the first number of layers and a total number of layers of the combination, or the first number of layers and an indication indicating whether the second number of layers is the same with or different from the first number of layers.
In some embodiments, the processor is further configured to cause the terminal device to: determine, according to a first portion of a first pre-defined look-up table, a first value of a first SRS resource indicator (SRI) ; and determine, according to a second portion of a first pre-defined look-up table, a second value of a second SRI, the second portion being the same with or different from the first portion and determined based on the first value, the first indication and the mapping information.
In some embodiments, the processor is further configured to cause the terminal device to: determine, according to a first portion of a second pre-defined look-up table, a third value of a first transmit precoding matrix indicator (TPMI) ; and determine, according to a second portion of a second pre-defined look-up table, a fourth value of a second TPMI, the second portion being the same with or different from the first portion and determined based on the third value, the first indication and the mapping information.
In some embodiments, the first and second parameter sets are associated with a single configuration.
In some embodiments, the first parameter set is associated with a first configuration and the second parameter set is associated with a second configuration, and wherein the configuration information further indicates an association between the first configuration and the second configuration.
In some embodiments, the simultaneous transmission scheme is a space division multiplexing (SDM) scheme or a single frequency network (SFN) scheme.
In some embodiments, the uplink transmissions are one of the following: dynamic grant (DG) uplink transmissions, configured grant (CG) uplink transmissions with a first type, or CG uplink transmissions with a second type.
In an aspect, it is proposed a terminal device comprising: a processor configured to cause the terminal device to: receive, from a network device, configuration information indicating: a first configuration of a first uplink transmission, the first configuration indicating a first parameter set, a second configuration of a second uplink transmission, the second configuration indicating a second parameter set determined based at least in part on the first parameter set, the second uplink transmission being at least partly overlapped with the first uplink transmission during a duration; and perform, based on the first and second parameter sets, the first and second uplink transmissions simultaneously during the duration.
In some embodiments, the first uplink transmission is a configured grant (CG) uplink transmission and the second uplink transmission is a dynamic grant (DG) uplink transmission.
In some embodiments, the first and second configurations are associated with different control recourse sets (CORSETs) and/or different timing advance group (TAG) .
In some embodiments, the first parameter set is associated with a first sounding reference signal (SRS) resource set, and the second parameter set is associated with a second SRS resource set.
In some embodiments, the first parameter set is associated with a first sounding reference signal (SRS) resource set, and wherein during a duration that the first uplink transmission is overlapped with the second uplink transmission, the second parameter set is associated with the second SRS resource set, and wherein during a duration that the first uplink transmission is not overlapped with the second uplink transmission, the second parameter set is associated with at least one of the first and second SRS resource sets.
In some embodiments, the first parameter set is associated with a first sounding reference signal (SRS) resource set and a second SRS resource set, and the first uplink transmission is configured with a simultaneous transmission scheme, and wherein during a duration that the first uplink transmission is overlapped with the second uplink transmission, the second uplink transmission is not expected.
In some embodiments, the first parameter set is associated with a first sounding reference signal (SRS) resource set and a second SRS resource set, and the first uplink transmission is configured with a time division multiplexing (TDM) scheme, and wherein during a duration that the first uplink transmission is overlapped with the second uplink transmission, the first and second parameter sets are associated with different SRS resource sets.
In an aspect, it is proposed a terminal device comprising: a processor configured to cause the terminal device to: receive, from a network device, first configuration information for a first uplink transmission, the first uplink transmission being associated with a first timing advance group (TAG) ; receive, from the network device, second configuration information for a second uplink transmission, the second uplink transmission being associated with a second TAG, wherein the second uplink transmission is not overlapped with the first uplink transmission in a first duration, the first duration being associated with: a second duration of the first uplink transmission, and a third duration associated with a first difference between the first TAG and the second TAG; and perform, with the network device, the first and second uplink transmissions based at least in part on the first and second configuration information, respectively.
In some embodiments, the second uplink transmission is scheduled based at least in part on the third duration, a time point of receiving a grant of the second uplink transmission, or a fourth duration from the time point of receiving a grant of the second uplink transmission to a further time point of performing the second uplink transmission.
In some embodiments, the first uplink transmission is associated with a first timing reference, and the second uplink transmission is associated with a second timing reference, and wherein the second uplink transmission is scheduled based at least in part on a second difference between the first timing reference and the second timing reference.
In an aspect, it is proposed a network device comprising: a processor configured to cause the network device to: transmit, to a terminal device, configuration information for uplink transmissions associated with a first sounding reference signal (SRS) resource set and a second SRS resource set, the configuration information indicating: a first parameter set and a second parameter set to be used for the uplink transmissions, a first indication indicating a simultaneous transmission scheme of the uplink transmissions, and a mapping information indicating at least one of the following: correspondence between the first and second parameter sets and the first and second SRS resource sets, or a combination of the number of layers associated with the first and second parameter sets; and receive the uplink transmissions from the terminal device.
In some embodiments, any of the first and second parameter sets comprises at least one of the following: at least one parameter used for power control, an SRS resource indicator, precoding information, a number of layers, an identity of a control response set, or an identity of a timing advance group (TAG) .
In some embodiments, the mapping information indicates the correspondence by one of the following: a first value indicating that the first parameter set is associated with the first SRS resource set and the second parameter set is invalid, a second value indicating that the first parameter set is associated with the second SRS resource set and the second parameter set is invalid, a third value indicating that the first parameter set is associated with the first SRS resource set and the second parameter set is associated with the second SRS resource set, or a fourth value indicating that the first parameter set is associated with the second SRS resource set and the second parameter set is associated with the first SRS resource set.
In some embodiments, the mapping information indicates the combination by one of the following: a fifth value indicating that the first parameter set is associated with a first number of layers and the second parameter set is associated with a second number of layers, a sixth value indicating that the first parameter set is associated with the second number of layers and the second parameter set is associated with the first number of layers, a seventh value indicating that both the first and second parameter sets are associated with the first number of layers, or an eighth value indicating that both the first and second parameter set are associated with the second number of layers.
In some embodiments, the mapping information indicates the correspondence and the combination by one of the following: a ninth value indicating that the first parameter set is associated with the first SRS resource set and a first number of layers, and the second parameter set is associated with the second SRS resource set and a second number of layers, a tenth value indicating that the first parameter set is associated with the first SRS resource set and a second number of layers, and the second parameter set is associated with the second SRS resource set and the first number of layers, an eleventh value indicating that the first parameter set is associated with the second SRS resource set and the first number of layers, and the second parameter set is associated with the first SRS resource set and the second number of layers, or a twelfth value indicating that the first parameter set is associated with the second SRS resource set and the second number of layers, and the second parameter set is associated with the first SRS resource set and the first number of layers.
In some embodiments, the mapping information is indicated by an SRS resource set indication.
In some embodiments, the combination of the number of layers is indicated separately from the correspondence and or jointly with the correspondence.
In some embodiments, the combination of the number of layers is indicated by at least one of the following: a first number of layers and a second number of layers, the first number of layers and a total number of layers of the combination, or the first number of layers and an indication indicating whether the second number of layers is the same with or different from the first number of layers.
In some embodiments, the first and second parameter sets are associated with a single configuration.
In some embodiments, the first parameter set is associated with a first configuration and the second parameter set is associated with a second configuration, and wherein the configuration information further indicates an association between the first configuration and the second configuration.
In some embodiments, the simultaneous transmission scheme is a space division multiplexing (SDM) scheme or a single frequency network (SFN) scheme.
In some embodiments, the uplink transmissions are one of the following: dynamic grant (DG) uplink transmissions, configured grant (CG) uplink transmissions with a first type, or CG uplink transmissions with a second type.
In an aspect, it is proposed a network device comprising: a processor configured to cause the network device to: transmit, to a terminal device, configuration information indicating: a first configuration of a first uplink transmission, the first configuration indicating a first parameter set during a duration, a second configuration of a second uplink transmission, the second configuration indicating a second parameter set determined based at least in part on the first parameter set, the second uplink transmission being at least partly overlapped with the first uplink transmission during the duration; and receive the first and second uplink transmissions simultaneously.
In some embodiments, the first uplink transmission is a configured grant (CG) uplink transmission and the second uplink transmission is a dynamic grant (DG) uplink transmission.
In some embodiments, the first and second configurations are associated with different control recourse sets (CORSETs) and/or different timing advance group (TAG) .
In some embodiments, the first parameter set is associated with a first sounding reference signal (SRS) resource set, and the second parameter set is associated with a second SRS resource set.
In some embodiments, the first parameter set is associated with a first sounding reference signal (SRS) resource set, and wherein during a duration that the first uplink transmission is overlapped with the second uplink transmission, the second parameter set is associated with the second SRS resource set, and wherein during a duration that the first uplink transmission is not overlapped with the second uplink transmission, the second parameter set is associated with at least one of the first and second SRS resource sets.
In some embodiments, the first parameter set is associated with a first sounding reference signal (SRS) resource set and a second SRS resource set, and the first uplink transmission is configured with a simultaneous transmission scheme, and wherein during a duration that the first uplink transmission is overlapped with the second uplink transmission, the second uplink transmission is not expected.
In some embodiments, the first parameter set is associated with a first sounding reference signal (SRS) resource set and a second SRS resource set, and the first uplink transmission is configured with a time division multiplexing (TDM) scheme, and wherein during a duration that the first uplink transmission is overlapped with the second uplink transmission, the first and second parameter sets are associated with different SRS resource sets.
In an aspect, it is proposed a network device comprising: a processor configured to cause the network device to: transmit, to a terminal device, first configuration information for a first uplink transmission, the first uplink transmission being associated with a first timing advance group (TAG) ; transmit, to the terminal device, second configuration information for a second uplink transmission, the second uplink transmission being associated with a second TAG, wherein the second uplink transmission is not overlapped with the first uplink transmission in a first duration, the first duration being associated with: a second duration of the first uplink transmission, and a third duration associated with a first difference between the first TAG and the second TAG; and receive, from the terminal device, the first and second uplink transmissions based at least in part on the first and second configuration information, respectively.
In some embodiments, the second uplink transmission is scheduled based at least in part on the third duration, a time point of receiving a grant of the second uplink transmission, or a fourth duration from the time point of receiving a grant of the second uplink transmission to a further time point of performing the second uplink transmission.
In some embodiments, the first uplink transmission is associated with a first timing reference, and the second uplink transmission is associated with a second timing reference, and wherein the second uplink transmission is scheduled based at least in part on a second difference between the first timing reference and the second timing reference.
In an aspect, a terminal device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the terminal device discussed above.
In an aspect, a network device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the network device discussed above.
In an aspect, a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
In an aspect, a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
In an aspect, a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
In an aspect, a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
Generally, various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. While various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representation, it will be appreciated that the blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
The present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium. The computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target real or virtual processor, to carry out the process or method as described above with reference to FIGS. 1 to 17. Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types. The functionality of the program modules may be combined or split between program modules as desired in various embodiments. Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.
Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions/operations specified in the flowcharts and/or block diagrams to be implemented. The program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
The above program code may be embodied on a machine readable medium, which may be any tangible medium that may contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine readable medium may be a machine readable signal medium or a machine readable storage medium. A machine readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of the machine readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
Further, while operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are contained in the above discussions, these should not be construed as limitations on the scope of the present disclosure, but rather as descriptions of features that may be specific to particular embodiments. Certain features that are described in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment may also be implemented in multiple embodiments separately or in any suitable sub-combination.
Although the present disclosure has been described in language specific to structural features and/or methodological acts, it is to be understood that the present disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.

Claims

A terminal device comprising:

a processor configured to cause the terminal device to:

receive, from a network device, configuration information for uplink transmissions associated with a first sounding reference signal (SRS) resource set and a second SRS resource set, the configuration information indicating:

a first parameter set and a second parameter set to be used for the uplink transmissions,

a first indication indicating a simultaneous transmission scheme of the uplink transmissions, and

a mapping information indicating at least one of the following:

correspondence between the first and second parameter sets and the first and second SRS resource sets, or

a combination of the number of layers associated with the first and second parameter sets;

determine, based at least in part on the first indication and the mapping information, the first and second parameter sets associated with the first and second SRS resource sets, respectively; and

perform, based on the first and second parameter sets, the uplink transmissions with a network device.
The terminal device of claim 1, wherein the mapping information indicates the correspondence by one of the following:

a first value indicating that the first parameter set is associated with the first SRS resource set and the second parameter set is invalid,

a second value indicating that the first parameter set is associated with the second SRS resource set and the second parameter set is invalid,

a third value indicating that the first parameter set is associated with the first SRS resource set and the second parameter set is associated with the second SRS resource set, or

a fourth value indicating that the first parameter set is associated with the second SRS resource set and the second parameter set is associated with the first SRS resource set.
The terminal device of claim 1, wherein the mapping information indicates the combination by one of the following:

a fifth value indicating that the first parameter set is associated with a first number of layers and the second parameter set is associated with a second number of layers,

a sixth value indicating that the first parameter set is associated with the second number of layers and the second parameter set is associated with the first number of layers,

a seventh value indicating that both the first and second parameter sets are associated with the first number of layers, or

an eighth value indicating both the first and second parameter sets are associated with the second number of layers.
The terminal device of claim 1, wherein the mapping information indicates the correspondence and the combination by one of the following:

a ninth value indicating that the first parameter set is associated with the first SRS resource set and a first number of layers, and the second parameter set is associated with the second SRS resource set and a second number of layers,

a tenth value indicating that the first parameter set is associated with the first SRS resource set and a second number of layers, and the second parameter set is associated with the second SRS resource set and the first number of layers,

an eleventh value indicating that the first parameter set is associated with the second SRS resource set and the first number of layers, and the second parameter set is associated with the first SRS resource set and the second number of layers, or

a twelfth value indicating that the first parameter set is associated with the second SRS resource set and the second number of layers, and the second parameter set is associated with the first SRS resource set and the first number of layers.
The terminal device of claim 1, wherein the mapping information is indicated by an SRS resource set indication.
The terminal device of claim 1, wherein the combination of the number of layers is indicated by at least one of the following:

a first number of layers and a second number of layers,

the first number of layers and a total number of layers of the combination, or

the first number of layers and an indication indicating whether the second number of layers is the same with or different from the first number of layers.
The terminal device of claim 1, wherein the processor is further configured to cause the terminal device to:

determine, according to a first portion of a first pre-defined look-up table, a first value of a first SRS resource indicator (SRI) ; and

determine, according to a second portion of a first pre-defined look-up table, a second value of a second SRI, the second portion being the same with or different from the first portion and determined based on the first value, the first indication and the mapping information.
The terminal device of claim 1, wherein the processor is further configured to cause the terminal device to:

determine, according to a first portion of a second pre-defined look-up table, a third value of a first transmit precoding matrix indicator (TPMI) ; and

determine, according to a second portion of a second pre-defined look-up table, a fourth value of a second TPMI, the second portion being the same with or different from the first portion and determined based on the third value, the first indication and the mapping information.
The terminal device of claim 1, wherein the first parameter set is associated with a first configuration and the second parameter set is associated with a second configuration,

and wherein the configuration information further indicates an association between the first configuration and the second configuration.
The terminal device of claim 1, wherein the uplink transmissions are one of the following:

dynamic grant (DG) uplink transmissions,

configured grant (CG) uplink transmissions with a first type, or

CG uplink transmissions with a second type.
A terminal device comprising:

a processor configured to cause the terminal device to:

receive from a network device, configuration information indicating:

a first configuration of a first uplink transmission, the first configuration indicating a first parameter set,

a second configuration of a second uplink transmission, the second configuration indicating a second parameter set determined based at least in part on the first parameter set, the second uplink transmission being at least partly overlapped with the first uplink transmission during a duration; and

perform, based on the first and second parameter sets, the first and second uplink transmissions simultaneously during the duration.
The terminal device of claim 11, wherein the first uplink transmission is a configured grant (CG) uplink transmission and the second uplink transmission is a dynamic grant (DG) uplink transmission.
The terminal device of claim 11, wherein the first and second configurations are associated with different control recourse sets (CORSETs) and/or different timing advance group (TAG) .
The terminal device of claim 11, wherein the first parameter set is associated with a first sounding reference signal (SRS) resource set,

and wherein during a duration that the first uplink transmission is overlapped with the second uplink transmission, the second parameter set is associated with the second SRS resource set,

and wherein during a duration that the first uplink transmission is not overlapped with the second uplink transmission, the second parameter set is associated with at least one of the first and second SRS resource sets.
The terminal device of claim 11, wherein the first parameter set is associated with a first sounding reference signal (SRS) resource set and a second SRS resource set, and the first uplink transmission is configured with a simultaneous transmission scheme,

and wherein during a duration that the first uplink transmission is overlapped with the second uplink transmission, the second uplink transmission is not expected.
The terminal device of claim 11, wherein the first parameter set is associated with a first sounding reference signal (SRS) resource set and a second SRS resource set, and the first uplink transmission is configured with a time division multiplexing (TDM) scheme,

and wherein during a duration that the first uplink transmission is overlapped with the second uplink transmission, the first and second parameter sets are associated with different SRS resource sets.
A terminal device comprising:

a processor configured to cause the terminal device to:

receive, from a network device, first configuration information for a first uplink transmission, the first uplink transmission being associated with a first timing advance group (TAG) ;

receive, from the network device, second configuration information for a second uplink transmission, the second uplink transmission being associated with a second TAG, wherein the second uplink transmission is not overlapped with the first uplink transmission in a first duration, the first duration being associated with:

a second duration of the first uplink transmission, and

a third duration associated with a first difference between the first TAG and the second TAG; and

perform, with the network device, the first and second uplink transmissions based at least in part on the first and second configuration information, respectively.
A network device comprising:

a processor configured to cause the network device to:

transmit, to a terminal device, configuration information for uplink transmissions associated with a first sounding reference signal (SRS) resource set and a second SRS resource set, the configuration information indicating:

a first parameter set and a second parameter set to be used for the uplink transmissions,

a first indication indicating a simultaneous transmission scheme of the uplink transmissions, and

a mapping information indicating at least one of the following:

correspondence between the first and second parameter sets and the first and second SRS resource sets, or

a combination of the number of layers associated with the first and second parameter sets; and

receive the uplink transmissions from the terminal device.
A network device comprising:

a processor configured to cause the network device to:

transmit, to a terminal device, configuration information indicating:

a first configuration of a first uplink transmission, the first configuration indicating a first parameter set during a duration,

a second configuration of a second uplink transmission, the second configuration indicating a second parameter set determined based at least in part on the first parameter set, the second uplink transmission being at least partly overlapped with the first uplink transmission during the duration; and

receive the first and second uplink transmissions simultaneously.
A network device comprising:

a processor configured to cause the network device to:

transmit, to a terminal device, first configuration information for a first uplink transmission, the first uplink transmission being associated with a first timing advance group (TAG) ;

transmit, to the terminal device, second configuration information for a second uplink transmission, the second uplink transmission being associated with a second TAG, wherein the second uplink transmission is not overlapped with the first uplink transmission in a first duration, the first duration being associated with:

a second duration of the first uplink transmission, and

a third duration associated with a first difference between the first TAG and the second TAG; and

receive, from the terminal device, the first and second uplink transmissions based at least in part on the first and second configuration information, respectively.