EP4691076A1

EP4691076A1 - Devices and methods for collision handling

Info

Publication number: EP4691076A1
Application number: EP23884062.3A
Authority: EP
Inventors: Yuantao Zhang; Ruixiang MA; Zhi YAN; Haiming Wang
Original assignee: Lenovo Beijing Ltd
Current assignee: Lenovo Beijing Ltd
Priority date: 2023-03-31
Filing date: 2023-03-31
Publication date: 2026-02-11
Also published as: GB2642620A; CN120883702A; WO2024093119A1

Abstract

Embodiments of the present disclosure relate to devices, methods, and a non-transitory computer readable medium for collision handling. A terminal device receives a signaling indicating a subset of flexible symbols as downlink (DL) symbols or flexible symbols from a network device, wherein the subset of flexible symbols is from a set of flexible symbols configured with an uplink (UL) subband. The terminal device determines whether to perform a UL transmission in the set of flexible symbols based on determining whether the UL transmission is within the UL subband. The terminal device performs the UL transmission in the set of flexible symbols in the case that the UL transmission is within the UL subband. In this way, cancellation of UL transmission can be avoided when DL and UL collision happen, and thus the performance of communications is improved.

Description

DEVICES AND METHODS FOR COLLISION HANDLING

FIELD

Embodiments of the present disclosure generally relate to the field of communication, and in particular to devices, methods, and a non-transitory computer readable medium for collision handling.

BACKGROUND

In wireless communication system, the term “duplex” means bidirectional communication between two devices, where the transmissions over the link in each direction may take place at the same time (i.e., full duplex) or mutual exclusive time (i.e., half duplex) . In legacy full duplex transceivers, different carrier frequencies are employed for each link direction. This is known as full duplex frequency division duplex (FD-FDD) . Conversely, in a half-duplex (HD) transceiver, the link directions are separated by time domain resources.
Advanced full duplex modes enable simultaneous transmission and reception by the same device on the same carrier, thus having the potential to double the link throughput. The transmission latency is also reduced thanks to bidirectional transmission simultaneously. However, simultaneous downlink (DL) and uplink (UL) in a same carrier will incur self-interference. In the base station (BS) side, this means DL transmission contaminates UL reception, while in the UE side, the UL transmission might contaminate DL reception. Enhancements on collision handling in duplex modes are still needed.
SUMMARY
In general, example embodiments of the present disclosure provide devices, methods and a computer readable medium for collision handling.
In a first aspect, there is provided a terminal device. The terminal device comprises a processor and a transceiver coupled to the processor. The processor is configured to receive, via the transceiver from a network device, a signaling indicating a subset of flexible symbols as downlink (DL) symbols or flexible symbols, wherein the subset of flexible symbols is from a set of flexible symbols configured with an uplink (UL) subband; determine whether to perform a UL transmission in the set of flexible symbols based on determining whether the UL transmission is within the UL subband; and perform, via the transceiver, the UL transmission in the set of flexible symbols in the case that the UL transmission is within the UL subband.
In a second aspect, there is provided a network device. The network device comprises a processor and a transceiver coupled to the processor. The processor is configured to transmit, via the transceiver to a terminal device, a signaling indicating a subset of flexible symbols as downlink (DL) symbols or flexible symbols, wherein the subset of flexible symbols is from a set of flexible symbols configured with uplink (UL) subband; determine whether to monitor a UL transmission in the set of flexible symbols based on determining whether the UL transmission is within the UL subband; and monitor the UL transmission in the set of flexible symbols in the case that the UL transmission is within the UL subband.
In a third aspect, there is provided a method performed by a terminal device. The method comprises receiving, via the transceiver from a network device, a signaling indicating a subset of flexible symbols as downlink (DL) symbols or flexible symbols, wherein the subset of flexible symbols is from a set of flexible symbols configured with an uplink (UL) transmission; determining whether to perform the UL transmission in the set of flexible symbols based on determining whether the UL transmission is within a UL subband; and performing, via the transceiver, the UL transmission in the set of flexible symbols in the case that the UL transmission is within the UL subband.
In a fourth aspect, there is provided a method performed by a network device. The method comprises transmitting, via the transceiver to a terminal device, a signaling indicating a subset of flexible symbols as downlink (DL) symbols or flexible symbols, wherein the subset of flexible symbols is from a set of flexible symbols configured with uplink (UL) transmission; determining whether to monitor the UL transmission in the set of flexible symbols based on determining whether the UL transmission is within a UL subband; and monitoring the UL transmission in the set of flexible symbols in the case that the UL transmission is within the UL subband.
In a fifth aspect, there is provided a non-transitory computer readable medium. The non-transitory computer readable medium having program instructions stored thereon. The program instructions, when executed by an apparatus, causing the apparatus at least to perform the method according to the third aspect or the fourth aspect above.
It is to be understood that the summary section is not intended to identify key or essential features of embodiments of the present disclosure, nor is it intended to be used to limit the scope of the present disclosure. Other features of the present disclosure will become easily comprehensible through the following description.

BRIEF DESCRIPTION OF THE DRAWINGS

Some embodiments will now be described with reference to the accompanying drawings, in which:
Fig. 1A illustrates an example network environment in which some embodiments of the present disclosure can be implemented;
Fig. 1B illustrates example duplex modes related to some embodiments of the present disclosure;
Fig. 1C illustrates an example transmission scenario related to some embodiments of the present disclosure;
Fig. 1D illustrates another example transmission scenario related to some embodiments of the present disclosure;
Fig. 2 illustrates an example signaling chart illustrating an example process according to some embodiments of the present disclosure;
Fig. 3 illustrates an example transmission scenario according to some embodiments of the present disclosure;
Fig. 4 illustrates another example transmission scenario according to some embodiments of the present disclosure;
Fig. 5 illustrates yet another example transmission scenario according to some embodiments of the present disclosure;
Fig. 6 illustrates a flowchart of a method implemented at a terminal device according to some embodiments of the present disclosure;
Fig. 7 illustrates a flowchart of a method implemented at a network device according to some other embodiments of the present disclosure; and
Fig. 8 illustrates a simplified block diagram of an apparatus that is suitable for implementing embodiments of the present disclosure.
Throughout the drawings, the same or similar reference numerals represent the same or similar elements.

DETAILED DESCRIPTION

Principles of the present disclosure will now be described with reference to some 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. The disclosure described herein may 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.
References in the present disclosure to “one embodiment, ” “an example embodiment, ” “an embodiment, ” “some embodiments, ” and the like indicate that the embodiment (s) described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases do not necessarily refer to the same embodiment (s) . Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
It shall be understood that although the terms “first” and “second” or the like may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element could also be termed as a second element, and similarly, a second element could also be termed as a first element, without departing from the scope of embodiments. As used herein, the term “and/or” includes any and all combinations of one or more of the listed terms.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. 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. It will be further understood that the terms “comprises” , “comprising” , “has” , “having” , “includes” and/or “including” , when used herein, specify the presence of stated features, elements, and/or components etc., but do not preclude the presence or addition of one or more other features, elements, components and/or combinations thereof.
As used herein, the term “communication network” refers to a network following any suitable communication standards, such as, 5G NR, Long Term Evolution (LTE) , LTE-Advanced (LTE-A) , Wideband Code Division Multiple Access (WCDMA) , High-Speed Packet Access (HSPA) , Narrow Band Internet of Things (NB-IoT) , and so on. Further, the communications between a terminal device and a network device in the communication network may be performed according to any suitable generation communication protocols, including 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, and/or any other protocols either currently known or to be developed in the future. Embodiments of the present disclosure may be applied in various communication systems. Given the rapid development in communications, there will also be future type communication technologies and systems in which the present disclosure may be embodied. It should not be seen as limiting the scope of the present disclosure to only the aforementioned systems.
As used herein, the term “network device” generally refers to a node in a communication network via which a terminal device can access the communication network and receive services therefrom. The network device may refer to a base station (BS) or an access point (AP) , for example, a node B (NodeB or NB) , a radio access network (RAN) node, an evolved NodeB (eNodeB or eNB) , a NR NB (also referred to as a gNB) , a Remote Radio Unit (RRU) , a radio header (RH) , an infrastructure device for a V2X (vehicle-to-everything) communication, a transmission and reception point (TRP) , a reception point (RP) , a remote radio head (RRH) , a relay, an integrated access and backhaul (IAB) node, a low power node such as a femto BS, a pico BS, and so forth, depending on the applied terminology and technology.
As used herein, the term “terminal device” generally refers to any end device that may be capable of wireless communications. By way of example rather than a limitation, a terminal device may also be referred to as a communication device, a user equipment (UE) , an end user device, a subscriber station (SS) , an unmanned aerial vehicle (UAV) , a portable subscriber station, a mobile station (MS) , or an access terminal (AT) . The terminal device may include, but is not limited to, a mobile phone, a cellular phone, a smart phone, a voice over IP (VoIP) phone, a wireless local loop phone, a tablet, a wearable terminal device, a personal digital assistant (PDA) , a portable computer, a desktop computer, an image capture terminal device such as a digital camera, a gaming terminal device, a music storage and playback appliance, a vehicle-mounted wireless terminal device, a wireless endpoint, a mobile station, laptop-embedded equipment (LEE) , laptop-mounted equipment (LME) , a USB dongle, a smart device, wireless customer-premises equipment (CPE) , an Internet of Things (loT) device, a watch or other wearable, a head-mounted display (HMD) , a vehicle, a drone, a medical device (for example, a remote surgery device) , an industrial device (for example, a robot and/or other wireless devices operating in an industrial and/or an automated processing chain contexts) , a consumer electronics device, a device operating on commercial and/or industrial wireless networks, and the like. In the following description, the terms: “terminal device, ” “communication device, ” “terminal, ” “user equipment” and “UE, ” may be used interchangeably.
As used herein, the term “resource, ” “transmission resource, ” “resource block, ” “physical resource block, ” “uplink resource, ” or “downlink resource” may refer to any resource, for example 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, used for performing a communication between a terminal device and a network device or between terminal devices. In the following, a resource in both frequency and time domain will be used as an example of a transmission resource for describing some embodiments of the present disclosure. It is noted that embodiments of the present disclosure equally apply to other resources in other domains.
Fig. 1 illustrates an example network environment 100 in which example embodiments of the present disclosure may be implemented. The environment 100, which may be a part of a communication network, comprises terminal devices and network devices.
As illustrated in Fig. 1, the communication network 100 may comprise a terminal device 110 (hereinafter may also be referred to as user equipment 110 or a UE 110) . The communication network 100 may further comprise a network device 120. The network device 120 may manage a cell 101. The terminal device 110 and the network device 120 may communicate data and control information to each other in the coverage of the cell. A link from the network device 120 to the terminal device 110 is referred to as a downlink (DL) , while a link from the terminal device 110 to the network device 120 is referred to as an uplink (UL) .
It is to be understood that the number of network devices and terminal devices is only for the purpose of illustration without suggesting any limitations. The system 100 may include any suitable number of network devices and terminal devices adapted for implementing embodiments of the present disclosure. Although not shown, it would be appreciated that one or more terminal devices may be located in the environment 100.
The communications in the communication network 100 may conform to any suitable standards including, but not limited to, Global System for Mobile Communications (GSM) , LTE, LTE-Evolution, LTE-Advanced (LTE-A) , Wideband Code Division Multiple Access (WCDMA) , Code Division Multiple Access (CDMA) , GSM EDGE Radio Access Network (GERAN) , Machine Type Communication (MTC) and the like. Furthermore, the communications 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.
In wireless communication system, the term “duplex” means bidirectional communication between two devices, where the transmissions over the link in each direction may take place at the same time (i.e., full duplex) or mutual exclusive time (i.e., half duplex) .
In legacy full duplex transceivers, different carrier frequencies are employed for each link direction. This is known as full duplex frequency division duplex (FD-FDD) . Conversely, in a half-duplex (HD) transceiver, the link directions are separated by time domain resources. When the same carrier frequency is used for each link direction, the HD transceiver is referred as a TDD system, while if different carrier frequencies are used, the system is known as half duplex FDD (HD-FDD) . Fig. 1B illustrates example duplex modes related to some embodiments of the present disclosure. As shown in Fig. 1B, there are FD-FDD mode, TDD mode and HD-FDD mode.
Advanced full duplex modes enable simultaneous transmission and reception by the same device on the same carrier, thus having potential to double the link throughput. The transmission latency is also reduced due to bidirectional transmission simultaneously. However, simultaneous DL and UL in a same carrier will incur self-interference. In the BS side, this means DL transmission contaminating UL reception, while in the UE side, the UL transmission might contaminate DL reception.
In practice, it is more feasible to realize full duplex in BS side than in UE side because more space is available in the BS side and Tx/Rx antenna branches can be separated for self-interference cancellation. Besides, more advanced receiver can be adopted in the BS side, which is fundamental for self-interference cancellation.
Therefore, one scenario is to deploy full duplex in BS side only, while half duplex is still used in the UE side. This means in a set of time slots, the BS may transmit data signal to some UEs, and receive data signal from others. In addition, non-overlapped frequency resources could be allocated for DL transmission (to some UEs) and UL reception (from other UEs) to mitigate self-interference. This kind of full duplex mode is known as subband full duplex (SBFD) . From UE point of view, the UEs could be categorized to be SBFD aware UEs (i.e., aware full duplex in BS side) and SBFD non-aware UEs, depending on UE capability.
In TDD system, SBFD can be used to enhance UL performance. A UL subband could be configured in some of the DL symbols or flexible symbols so that more resources are available for UL transmission. In such symbols, UL transmissions for some UEs could be scheduled in the UL subband while DL transmission for other UEs could be scheduled in the resources out of the UL subband.
Fig. 1C illustrates an example transmission scenario related to some embodiments of the present disclosure. As shown in Fig. 1C, the transmission scenario is SBFD in TDD system, where a UL subband is configured on a set of DL symbols and a set of flexible symbols. UL transmission can be scheduled in the symbols with UL subband. In the UL slots, the UL transmission is scheduled in the active UL bandwidth parts (BWP) .
In flexible symbols in TDD system, one kind of collision happens between the higher layer configured UL channels or signals and the dynamic indicated DL transmission or dynamic indicated DL communication direction. New radio (NR) handles such collision using following schemes.
If a UE is configured by higher layers to transmit sounding reference signal (SRS) , physical uplink control channel (PUCCH) , physical uplink shared channel (PUSCH) , or physical random access channel (PRACH) in a set of symbols of a slot and the UE detects a downlink control information (DCI format 2_0 with a slot format value that indicates a slot format with a subset of symbols from the set of symbols as downlink or flexible, or the UE detects a DCI format indicating to the UE to receive channel state information (CSI) reference signal (RS) or physical downlink shared channel (PDSCH) in a subset of symbols from the set of symbols, then
- If the UE does not indicate the capability of [partialCancellation] , the UE does not expect to cancel the transmission of the PUCCH or PUSCH or PRACH in the set of symbols if the first symbol in the set occurs within T_proc, 2 relative to a last symbol of a CORESET where the UE detects the DCI format; otherwise, the UE cancels the PUCCH, or the PUSCH, or an actual repetition of the PUSCH, or the PRACH transmission in the set of symbols.
- If the UE indicates the capability of [partialCancellation] , the UE does not expect to cancel the transmission of the PUCCH or PUSCH or PRACH in symbols from the set of symbols that occur within T_proc, 2 relative to a last symbol of a CORESET where the UE detects the DCI format. The UE cancels the PUCCH, or the PUSCH, or an actual repetition of the PUSCH, or the PRACH transmission in remaining symbols from the set of symbols.
- The UE does not expect to cancel the transmission of SRS in symbols from the subset of symbols that occur within T_proc, 2 relative to a last symbol of a CORESET where the UE detects the DCI format. The UE cancels the SRS transmission in remaining symbols from the subset of symbols.
T_proc, 2 is the PUSCH preparation time for the corresponding UE processing capability.
Fig. 1D illustrates another example transmission scenario related to some embodiments of the present disclosure. As shown in Fig. 1D, slot #n is a DL slot and slot #n+1 and slot n+2 are slots with flexible symbols. In slot #n, there is a DCI indicating slot #n+1 and slot #n+2 to be DL slots. The time gap between the last symbol of CORESET that accommodates the DCI and the first symbol of the PUCCH in slot #n+1 and the PUCCH in slot #n+1 is t1 and t2 respectively, t1 < T_proc, 2 and t2 > T_proc, 2. According to specification,
- t1 < T_proc, 2, PUCCH in slot n+1 will not be cancelled (if the UE does not indicate the capability of partialcancellation) .
- t2 > T_proc, 2, PUCCH will be cancelled.
It can be observed from above that in legacy, when DL and UL collision happens, the higher layer configured UL transmission will be cancelled in various scenarios. For flexible symbols configured with UL subband, there are opportunities to relax the DL and UL collision, i.e., no need to cancel the UL transmission when collision happens, since both DL and UL resources are available in these symbols. This is beneficial in terms of improving UL channels or signals transmission efficiency. This invention proposes solutions to relax DL and UL collision for flexible symbols configured with UL subband.
In view of the above discussions, embodiments of the present disclosure provide a solution for collision handling. In one aspect of the solution of the present disclosure, a terminal device receives a signaling indicating a subset of flexible symbols as downlink (DL) symbols or flexible symbols from a network device, wherein the subset of flexible symbols is from a set of flexible symbols configured with an uplink (UL) subband. The terminal device determines whether to perform a UL transmission in the set of flexible symbols based on determining whether the UL transmission is within the UL subband. The terminal device performs the UL transmission in the set of flexible symbols in the case that the UL transmission is within the UL subband. In this way, cancellation of UL transmission can be avoided when DL and UL collision happens. Thereby the performance of communications is improved. Principles and implementations of embodiments of the present disclosure will be described in detail below with reference to Fig. 2-8.
EXAMPLE METHOD
Fig. 2 illustrates an example signaling chart illustrating an example process 200 according to some embodiments of the present disclosure. For the purpose of discussion, the example 200 will be described with reference to Fig. 1A.
In the example process 200, a network device 120 transmits 205 a signaling 202 indicating a subset of flexible symbols as downlink (DL) symbols or flexible symbols to a terminal device 110. The subset of flexible symbols is from a set of flexible symbols configured with an uplink (UL) subband. Correspondingly, the terminal device 110 receives 210 the signaling 202 from the network device 120. Then the terminal device 110 determines 215 whether to perform a UL transmission in the set of flexible symbols based on determining whether the UL transmission is within the UL subband.
For example, for flexible symbols configured with UL subband, when collision between dynamic DL indication and semi-static configured UL transmission happens, whether the UE cancels the UL transmission depends on whether the configured UL channels or signals are within the configured UL subband.
In some embodiments, the UL transmission may comprise a sounding reference signal (SRS) transmission, a physical uplink control channel (PUCCH) transmission, a physical uplink shared channel (PUSCH) transmission, or a physical random access channel (PRACH) transmission.
Then the terminal device 110 performs 220 the UL transmission in the set of flexible symbols in the case that the UL transmission is within the UL subband.
In some embodiments, the terminal device 110 may cancel 225 the UL transmission in the set of flexible symbols in the case that the UL transmission is outside of the UL subband.
In some embodiments, the terminal device 110 may not indicate a capability of partial cancellation in time domain, and a first symbol in the set of flexible symbols may occur outside of a predefined time gap relative to a last symbol of a control resource set where the terminal device 110 detects the signaling. In determining whether to perform the UL transmission, the terminal device 110 may perform the UL transmission in the flexible symbols in the case that the UL transmission is within the UL subband via the transceiver. The terminal device 110 may cancel the UL transmission in the flexible symbols in the case that the UL transmission is outside the UL subband.
For example, if a UE is configured by higher layers to transmit SRS, or PUCCH, or PUSCH, or PRACH in a set of symbols of a slot and the UE detects a DCI format indicating a slot format with a subset of symbols from the set of symbols as downlink or flexible. Based on a predefined rule or based on a configuration, the UE assumes the UL subband is still available in the subset of symbols indicated as downlink or flexible.
If the UE does not indicate the capability of [partialCancellation] , the UE does not expect to cancel the transmission of the PUCCH or PUSCH or PRACH in the set of symbols if the first symbol in the set occurs within T_proc, 2 relative to a last symbol of a CORESET where the UE detects the DCI format; otherwise,
- The UE does not expect to cancel the transmission of the PUCCH or PUSCH or PRACH in the set of symbols if PUCCH or PUSCH or PRACH are fully within the UL subband.
- The UE cancels the PUCCH, or the PUSCH, or an actual repetition of the PUSCH or the PRACH transmission in the set of symbols if PUCCH or PUSCH or PRACH are fully outside of UL subband.
In some embodiments, the terminal device 110 may indicate a capability of partial cancellation in time domain. In determining whether to perform the UL transmission, the terminal device 110 may perform the UL transmission in at least one symbol from the subset of flexible symbols that occur within a predefined time gap via the transceiver in the case that a first symbol in the set of flexible symbols occurs within the predefined time gap relative to a last symbol of a control resource set where the terminal device detects the signaling. The terminal device 110 may perform the UL transmission in remain symbols from the subset of flexible symbols that occur outside of the predefined time gap via the transceiver in the case that UL transmission in the remain symbols is within the UL subband. The terminal device 110 may cancel the UL transmission in the remain symbols from the subset of flexible symbols that occur outside of the predefined time gap in the case that the UL transmission in the remain symbols is outside of the UL subband.
For example, if the UE indicates the capability of [partialCancellation] , the UE does not expect to cancel the transmission of the PUCCH or PUSCH or PRACH in symbols from the set of symbols that occur within T_proc, 2 relative to a last symbol of a CORESET where the UE detects the DCI format. Otherwise
- The UE does not expect to cancel the PUCCH, or the PUSCH, or an actual repetition of the PUSCH or the PRACH transmission in remaining symbols from the set of symbols, if PUCCH or PUSCH or PRACH are fully within of UL subband.
- The UE cancels the PUCCH, or the PUSCH, or an actual repetition of the PUSCH or the PRACH transmission in remaining symbols from the set of symbols, if PUCCH or PUSCH or PRACH are fully outside of UL subband.
In some embodiments, the UL transmission may be the SRS transmission. In determining whether to perform the UL transmission, the terminal device 110 may perform the SRS transmission in at least one symbol from the subset of flexible symbols that occur within a predefined time gap in the case that a first symbol in the set of flexible symbols occurs within the predefined time gap relative to a last symbol of a control resource set where the terminal device detects the signaling. The terminal device 110 may perform the UL transmission in the remain symbols from the subset of flexible symbols that occur outside of the predefined time gap via the transceiver in the case that the UL transmission is within the UL subband. The terminal device 110 may cancel the UL transmission in the remain symbols from the subset of flexible symbols that occur outside of the predefined time gap in the case that the UL transmission is outside the UL subband.
For example, the UE does not expect to cancel the transmission of SRS in symbols from the subset of symbols that occur within T_proc, 2 relative to a last symbol of a CORESET where the UE detects the DCI format.
- The UE does not expect to cancel the SRS transmission in remaining symbols from the subset of symbols, if the SRS are fully transmitted in the UL subband.
- Otherwise, the UE cancels the SRS transmission in the remaining symbols from the subset of symbols.
Fig. 3 illustrates an example transmission scenario according to some embodiments of the present disclosure. As shown in Fig. 3, slot #n is a DL slot and slot #n+1 and slot n+2 are slots with flexible symbols. UL subband is configured in slot #n+1 and slot #n+2. In each of slot #n+1 and slot #n+2, there is a higher layer configured PUCCH that is within the UL subband. A DCI is received in slot #n, indicating slot #n+1 and slot #n+2 to be DL slots. Based on a predefined rule or based on a configuration, the UL subband is still available in slot n#1 and slot n+2. The time gap between the last symbol of CORESET that accommodates the DCI and the first symbol of the PUCCH in slot #n+1 and the PUCCH in slot #n+1 is t1 and t2 respectively, t1 < T_proc, 2 and t2 > T_proc, 2. According to the solution,
- t1 < T_proc, 2, PUCCH in slot #n+1 will not be cancelled.
- t2 > T_proc, 2, PUCCH in slot #n+2 will not be cancelled since PUCCH is within the UL subband.
In some embodiments, the terminal device 110 may indicate a capability of partial cancellation in frequency domain. In determining whether to perform the UL transmission, the terminal device 110 may perform the UL transmission in a first physical resource blocks (PRB) in a set of PRBs for the UL transmission via the transceiver in the case that the first PRB is within the UL subband, and cancel the UL transmission in a second PRB in the set of PRBs for the UL transmission in the case that the second PRB is outside of the UL subband.
For example, to handle the cases when part of PRBs of the semi-statically configured UL transmissions are within the UL subband, it is proposed to introduce a UE capability indicating partial cancellation in frequency domain. If the UE indicates such capability, the UL transmission in the PRBs within the UL subband will not be cancelled when collision happens. Otherwise, the UL transmission will be cancelled.
If a UE is configured by higher layers to transmit SRS, or PUCCH, or PUSCH, or PRACH in a set of symbols of a slot and the UE detects a DCI format indicating a slot format with a subset of symbols from the set of symbols as downlink or flexible,
- If the UE indicates the capability of partial cancellation in frequency domain, the UE does not expect to cancel the transmission of the PUCCH or PUSCH or PRACH in the set of PRBs if these PRBs are within the UL subband. The UE cancels channels or signals transmission in the remain PRBs.
- If the UE does not indicate the capability of partial cancellation in frequency domain, the UE cancels the PUCCH or the PUSCH or PRACH transmission.
Fig. 4 illustrates another example transmission scenario according to some embodiments of the present disclosure. As shown in Fig. 4, slot #n is a DL slot and slot #n+1 and slot n+2 are slots with flexible symbols. UL subband is configured in slot #n+1 and slot #n+2. In slot #n+2, there is a higher layer configured PUSCH that partly within the UL subband. In slot #n, a DCI indicates slot #n+2 to be DL slots. The time gap between the last symbol of CORESET that accommodates the DCI and the first symbol of the PUSCH in slot #n+2 is t1, t1 > T_proc, 2. According to the proposals,
- t1 > T_proc, 2, PUSCH in the set of PRBs within the UL subband will not be cancelled. PUSCH PRBs outside of UL subband will be cancelled.
In some embodiments, the terminal device 110 may not indicate a capability of partial cancellation in time domain. In determining whether to perform the UL transmission the terminal device 110 may cancel the UL transmission in the flexible symbols in the case that the UL transmission is outside of the UL subband, and perform the UL transmission in at least one resource configured for the UL transmission in the UL subband.
In some embodiments, a priority of the least one resource configured for the UL transmission in the UL subband may be lower than a priority of at least one resource for the UL transmission in a UL bandwidth part (BWP) . In determining whether to perform the UL transmission, the terminal device 110 may perform the UL transmission on the at least one resource in the UL BWP via the transceiver in the case that there is no collision between the DL symbols and the UL transmission, and perform the UL transmission on the at least one resource in the UL subband via the transceiver in the case that there is a collision between the DL symbols and the UL transmission.
For example, to further reduce the cancellation of higher layer configured PUCCH when collision happens, a PUCCH resource of UL subband is introduced in PUCCH resource configuration for CSI report, such that when PUCCH in the UL BWP has to be cancelled, it can be transmitted in the configured PUCCH resource in the UL subband.
According to TS 38.331, the PUCCH resource for the CSI reporting is configured through IE in PUCCH-CSI-Resource, which is included in IE CSI-Report-Config for CSI reporting and is shown in below.
PUCCH-CSI-Resource indicates the PUCCH resource in each BWP for CSI report. According to the solution, a new IE PUCCH-ResourceSubband is introduced in PUCCH-CSI-Resource, indicating the available PUCCH resource in UL subband for CSI reporting. Therefore, PUCCH-CSI-Resource is updated to be,
The PUCCH resource in the UL subband might be available when the associated UL BWP is configured as the active BWP. The association of a UL subband and UL BWP might be based on configuration, or based on a predefined rule such as the UL subband is fully with the UL BWP.
In some embodiments, a priority of the least one resource configured for the UL transmission in the UL subband may be higher than a priority of at least one resource for the UL transmission in a UL BWP. In determining whether to perform the UL transmission, the terminal device 110 may perform the UL transmission on the at least one resource in the UL subband regardless of whether there is a collision between the DL symbols and the UL transmission via the transceiver.
In some embodiments, one of the priority of the least one resource in the UL subband and the priority of the at least one resource in the UL BWP is higher may be configure by a network device 120.
Following embodiments are proposed for usage of PUCCH resource for CSI feedback,
- For the CSI report in the UL slot, the PUCCH resource of the UL BWP (i.e., PUCCH-Resource) is used for the feedback.
- For the CSI report in the DL slot with UL subband, the PUCCH resource of UL subband (i.e., PUCCH-ResourceSubband) is used for the feedback.
- For the CSI report in the flexible symbols with UL subband,
■ Opt. 1: PUCCH resource of the UL BWP has higher priority over PUCCH of UL subband
■ Opt. 2: PUCCH resource of the UL subband has higher priority over PUCCH of UL BWP
■ Opt. 3: which PUCCH resource has higher priority is configured by the BS.
For CSI report in the flexible symbols with UL subband, especially for Opt. 1 or Opt. 3 where PUCCH resource of UL BWP is configured as higher priority, PUCCH resource of UL BWP is used for CSI report if there is no collision happens between DL and UL, and PUCCH resource of UL subband can be used when collision happens.
If a UE is configured by higher layers to transmit PUCCH in a set of symbols of a slot and the UE detects a DCI format with a slot format value that indicates a slot format with a subset of symbols from the set of symbols as downlink or flexible,
- The UE does not expect to cancel the transmission of the PUCCH in the set of symbols if the first symbol in the set occurs within T_proc, 2 relative to a last symbol of a CORESET where the UE detects the DCI format. The UE will transmit PUCCH in the configured PUCCH resource in the UL BWP.
- Otherwise,
■ The UE will cancel the PUCCH transmission in the UL BWP, but to transmit PUCCH in configured PUCCH resource in the UL subband.
Fig. 5 illustrates yet another example transmission scenario according to some embodiments of the present disclosure. Aa shown in Fig. 5, slot #n is a DL slot and slot #n+1 and slot n+2 are slots with flexible symbols. UL subband is configured in slot #n+2 and there is a higher layer configured PUCCH resource in the UL BWP and a PUCCH resource in UL subband in slot #n+2. In slot #n, a DCI indicates slot #n+2 to be DL slots and the time gap between the last symbol of CORESET that accommodates the DCI and the first symbol of the PUCCH in slot #n+2 is t1, t1 > T_proc, 2. According to the solution,
- t1 > T_proc, 2, the UE cancels PUCCH transmission in the UL BWP, but to transmit PUCCH in the UL subband.
In some embodiments, the UL transmission may be a first UL transmission, the UL subband may be a first UL subband, the set of flexible symbols may be a first set of flexible symbols. The terminal device 110 may further receive a disable signaling indicating that the UL subband is disabled for a second UL transmission via the transceiver from a network device. Then the terminal device 110 may determine whether to perform the second UL transmission in the second set of flexible symbols in the absence of the second UL subband. The terminal device 110 may perform the second UL transmission in the second set of flexible symbols in the case that the second UL transmission is determined to be performed via the transceiver, and cancel the second UL transmission in the second set of flexible symbols in the case that the second UL transmission is determined not to be performed.
For example, if a UE is configured by higher layers to transmit SRS, or PUCCH, or PUSCH, or PRACH in a set of symbols of a slot, wherein the slot is a DL slot configured with UL subband, (or these UL signals/channels are transmitted in a set of flexible symbols with UL subband) , and the UE receives a DCI indicating the UL subband is disabled,
- If the UE does not indicate the capability of [partialCancellation] , the UE does not expect to cancel the transmission of the PUCCH or PUSCH or PRACH in the set of symbols if the first symbol in the set occurs within T_proc, 2 relative to a last symbol of a CORESET where the UE detects the DCI format; otherwise, the UE cancels the PUCCH, or the PUSCH, or an actual repetition of the PUSCH, or the PRACH transmission in the set of symbols.
- If the UE indicates the capability of [partialCancellation] , the UE does not expect to cancel the transmission of the PUCCH or PUSCH or PRACH in symbols from the set of symbols that occur within T_proc, 2 relative to a last symbol of a CORESET where the UE detects the DCI format. The UE cancels the PUCCH, or the PUSCH, or an actual repetition of the PUSCH, or the PRACH transmission in remaining symbols from the set of symbols.
- The UE does not expect to cancel the transmission of SRS in symbols from the subset of symbols that occur within T_proc, 2 relative to a last symbol of a CORESET where the UE detects the DCI format. The UE cancels the SRS transmission in remaining symbols from the subset of symbols.
In some embodiments, the signaling may comprise downlink control information (DCI) , and the disable signaling may comprise DCI.
Reference is made back to Fig. 2, the network device 120 determines 230 whether to monitor a UL transmission in the set of flexible symbols based on determining whether the UL transmission is within the UL subband.
Then the network device 120 monitors 235 the UL transmission in the set of flexible symbols in the case that the UL transmission is within the UL subband.
In some embodiments, the terminal device 110 may not indicate a capability of partial cancellation in time domain, and a first symbol in the set of flexible symbols may occur outside of a predefined time gap relative to a last symbol of a control resource set where the terminal device 110 detects the signaling. In determining whether to monitor the UL transmission, the network device 120 may monitor the UL transmission in the flexible symbols in the case that the UL transmission is within the UL subband.
In some embodiments, the terminal device 110 may indicate a capability of partial cancellation in time domain. In determining whether to monitor the UL transmission, the network device 120 may monitor the UL transmission in at least one symbol from the subset of flexible symbols that occur within the predefined time gap, in the case that a first symbol in the set of flexible symbols occurs within the predefined time gap relative to a last symbol of a control resource set where the terminal device detects the signaling, and monitor the UL transmission in the remain symbols from the subset of flexible symbols that occur outside of the predefined time gap in the case that the remain symbols is within the UL subband.
In some embodiments, the UL transmission may be the SRS transmission. In determining whether to monitor the UL transmission, the network device 120 may monitor the SRS transmission in at least one symbol from the subset of flexible symbols that occur within a predefined time gap, in the case that a first symbol in the set of flexible symbols occurs within the predefined time gap relative to a last symbol of a control resource set where the terminal device detects the signaling. The network device 120 may monitor the UL transmission in the remain symbols from the subset of flexible symbols that occur outside of the predefined time gap in the case that the UL transmission is within the UL subband.
In some embodiments, the terminal device 110 may indicate a capability of partial cancellation in frequency domain. In determining whether to monitor the UL transmission, the network device 120 may monitor the UL transmission in a first physical resource blocks (PRB) in a set of PRBs for the UL transmission in the case that the first PRB is within the UL subband.
In some embodiments, the terminal device 110 may not indicate a capability of partial cancellation in time domain. In determining whether to monitor the UL transmission, the network device 120 may configure a resource in the UL subband for the UL transmission, and monitor the UL transmission in at least one resource configured for the UL transmission in the UL subband in the case that the UL transmission is outside of the UL subband.
In some embodiments, a priority of the least one resource configured for the UL transmission in the UL subband may be lower than a priority of at least one resource for the UL transmission in a UL bandwidth part (BWP) . In determining whether to monitor the UL transmission, the network device 120 may monitor the UL transmission on the at least one resource in the UL BWP in the case that there is no collision between the DL symbols and the UL transmission, and monitor the UL transmission in the resource configured on the at least one resource in the UL subband in the case that there is a collision between the DL symbols and the UL transmission.
In some embodiments, a priority of the least one resource configured for the UL transmission in the UL subband may be higher than a priority of at least one resource for the UL transmission in a UL BWP. In determining whether to monitor the UL transmission, the network device 120 may monitor the UL transmission on the at least one resource in the UL subband regardless of whether there is a collision between the DL symbols and the UL transmission.
In some embodiments, the network device 120 may configure which one of the priority of the least one resource in the UL subband and the priority of the at least one resource in the UL BWP is higher, and transmit the priority of the least one resource in the UL subband and the priority of the at least one resource in the UL BWP to the terminal device.
In some embodiments, the UL transmission may be a first UL transmission, the UL subband may be a first UL subband, the set of flexible symbols may be a first set of flexible symbols. The network device 120 may further transmit a disable signaling indicating that the UL subband is disabled to the terminal device, determine whether to monitor the second UL transmission in the second set of flexible symbols in the absence of the second UL subband. Then the network device 120 may monitor the second UL transmission in the second set of flexible symbols in the case that the second UL transmission is determined to be performed.
In general, in some embodiments of the present disclosure:
- For flexible symbols configured with UL subband, when collision between dynamic DL indication and semi-static configured UL transmission happens, whether the UE cancels the UL transmission depends on whether the configured UL channels/signals are within the configured UL subband.
- A UE capability indicating partial cancellation in frequency domain is introduced. If the UE indicates such capability, the UL transmission in the PRBs within the UL subband will not be cancelled when collision happens. Otherwise, the UL transmission will be cancelled.
- a PUCCH resource of UL subband in PUCCH resource configuration for CSI report is introduced. In this way, when PUCCH in the UL BWP has to be cancelled, it can be transmitted in the configured PUCCH resource in the UL subband.
■ PUCCH resource of UL BWP is used for CSI report if there is no collision happens between DL and UL, and PUCCH resource of UL subband can be used when collision happens.
In this way, cancellation of UL transmission can be avoided when DL and UL collision happen, and thus the performance of communications is improved.
Fig. 6 illustrates a flowchart of a method implemented at a terminal device according to some embodiments of the present disclosure. In some embodiments, the method 600 can be implemented at a communication device, such as the terminal device 110 as shown in Fig. 1A. In some other embodiments, the method 600 may be implemented at devices not shown in Fig. 1A. Further, it is to be understood that the method 600 may include additional blocks not shown and/or may omit some blocks as shown, and the scope of the present disclosure is not limited in this regard. For the purpose of discussion, the method 600 will be described from the perspective of the terminal device 110 with reference to FIG. 1A.
At block 610, the terminal device 110 receives a signaling indicating a subset of flexible symbols as downlink (DL) symbols or flexible symbols via the transceiver from a network device. The subset of flexible symbols is from a set of flexible symbols configured with an uplink (UL) subband. At block 620, the terminal device 110 determines whether to perform a UL transmission in the set of flexible symbols based on determining whether the UL transmission is within the UL subband. At block 630, the terminal device 110 performs the UL transmission in the set of flexible symbols via the transceiver in the case that the UL transmission is within the UL subband.
In some embodiments, the UL transmission may comprise a sounding reference signal (SRS) transmission, a physical uplink control channel (PUCCH) transmission, a physical uplink shared channel (PUSCH) transmission, or a physical random access channel (PRACH) transmission.
In some embodiments, the terminal device 110 may cancel the UL transmission in the set of flexible symbols in the case that the UL transmission is outside of the UL subband.
In some embodiments, the terminal device 110 may not indicate a capability of partial cancellation in time domain, and a first symbol in the set of flexible symbols may occur outside of a predefined time gap relative to a last symbol of a control resource set where the terminal device 110 detects the signaling. In determining whether to perform the UL transmission, the terminal device 110 may perform the UL transmission in the flexible symbols in the case that the UL transmission is within the UL subband via the transceiver. The terminal device 110 may cancel the UL transmission in the flexible symbols in the case that the UL transmission is outside the UL subband.
In some embodiments, the terminal device 110 may indicate a capability of partial cancellation in time domain. In determining whether to perform the UL transmission, the terminal device 110 may perform the UL transmission in at least one symbol from the subset of flexible symbols that occur within a predefined time gap via the transceiver in the case that a first symbol in the set of flexible symbols occurs within the predefined time gap relative to a last symbol of a control resource set where the terminal device detects the signaling. The terminal device 110 may perform the UL transmission in remain symbols from the subset of flexible symbols that occur outside of the predefined time gap via the transceiver in the case that the remain symbols is within the UL subband. The terminal device 110 may cancel the UL transmission in the remain symbols from the subset of flexible symbols that occur outside of the predefined time gap in the case that the remain symbols is outside of the UL subband.
In some embodiments, the UL transmission may be the SRS transmission. In determining whether to perform the UL transmission, the terminal device 110 may perform the SRS transmission in at least one symbol from the subset of flexible symbols that occur within a predefined time gap in the case that a first symbol in the set of flexible symbols occurs within the predefined time gap relative to a last symbol of a control resource set where the terminal device detects the signaling. The terminal device 110 may perform the UL transmission in the remain symbols from the subset of flexible symbols that occur outside of the predefined time gap via the transceiver in the case that the UL transmission is within the UL subband. The terminal device 110 may cancel the UL transmission in the remain symbols from the subset of flexible symbols that occur outside of the predefined time gap in the case that the UL transmission is outside the UL subband.
In some embodiments, the terminal device 110 may indicate a capability of partial cancellation in frequency domain. In determining whether to perform the UL transmission, the terminal device 110 may perform the UL transmission in a first physical resource blocks (PRB) in a set of PRBs for the UL transmission via the transceiver in the case that the first PRB is within the UL subband, and cancel the UL transmission in a second PRB in the set of PRBs for the UL transmission in the case that the second PRB is outside of the UL subband.
In some embodiments, the terminal device 110 may not indicate a capability of partial cancellation in time domain. In determining whether to perform the UL transmission the terminal device 110 may cancel the UL transmission in the flexible symbols in the case that the UL transmission is outside of the UL subband, and perform the UL transmission in at least one resource configured for the UL transmission in the UL subband.
In some embodiments, a priority of the least one resource configured for the UL transmission in the UL subband may be lower than a priority of at least one resource for the UL transmission in a UL bandwidth part (BWP) . In determining whether to perform the UL transmission, the terminal device 110 may perform the UL transmission on the at least one resource in the UL BWP via the transceiver in the case that there is no collision between the DL symbols and the UL transmission, and perform the UL transmission on the at least one resource in the UL subband via the transceiver in the case that there is a collision between the DL symbols and the UL transmission.
In some embodiments, a priority of the least one resource configured for the UL transmission in the UL subband may be higher than a priority of at least one resource for the UL transmission in a UL BWP. In determining whether to perform the UL transmission, the terminal device 110 may perform the UL transmission on the at least one resource in the UL subband regardless of whether there is a collision between the DL symbols and the UL transmission via the transceiver.
In some embodiments, one of the priority of the least one resource in the UL subband and the priority of the at least one resource in the UL BWP is higher may be configure by a network device.
In some embodiments, the UL transmission may be a first UL transmission, the UL subband may be a first UL subband, the set of flexible symbols may be a first set of flexible symbols. The terminal device 110 may further receive a disable signaling indicating that the UL subband is disabled for a second UL transmission via the transceiver from a network device. Then the terminal device 110 may determine whether to perform the second UL transmission in the second set of flexible symbols in the absence of the second UL subband. The terminal device 110 may perform the second UL transmission in the second set of flexible symbols in the case that the second UL transmission is determined to be performed via the transceiver, and cancel the second UL transmission in the second set of flexible symbols in the case that the second UL transmission is determined not to be performed. In some embodiments, the signaling may comprise downlink control information (DCI) , and the disable signaling may comprise DCI.
Fig. 7 illustrates a flowchart of a method implemented at a network device according to some embodiments of the present disclosure. In some embodiments, the method 700 can be implemented at a communication device, such as the network device 120 as shown in Fig. 1A. In some other embodiments, the method 700 may be implemented at devices not shown in Fig. 1A. Further, it is to be understood that the method 700 may include additional blocks not shown and/or may omit some blocks as shown, and the scope of the present disclosure is not limited in this regard. For the purpose of discussion, the method 700 will be described from the perspective of the network device 120 with reference to FIG. 1A.
At block 710, the network device 120 transmits a signaling indicating a subset of flexible symbols as downlink (DL) symbols or flexible symbols via the transceiver to a terminal device. The subset of flexible symbols is from a set of flexible symbols configured with an uplink (UL) subband. At block 720, the network device 120 determines whether to monitor the UL transmission in the set of flexible symbols based on determining whether the UL transmission is within a UL subband. At block 730, the network device 120 monitors the UL transmission in the set of flexible symbols in the case that the UL transmission is within the UL subband.
In some embodiments, the UL transmission may comprise a sounding reference signal (SRS) transmission, a physical uplink control channel (PUCCH) transmission, a physical uplink shared channel (PUSCH) transmission, or a physical random access channel (PRACH) transmission.
In some embodiments, the terminal device may not indicate a capability of partial cancellation in time domain, and a first symbol in the set of flexible symbols may occur outside of a predefined time gap relative to a last symbol of a control resource set where the terminal device 110 detects the signaling. In determining whether to monitor the UL transmission, the network device 120 may monitor the UL transmission in the flexible symbols in the case that the UL transmission is within the UL subband.
In some embodiments, the terminal device may indicate a capability of partial cancellation in time domain. In determining whether to monitor the UL transmission, the network device 120 may monitor the UL transmission in at least one symbol from the subset of flexible symbols that occur within the predefined time gap, in the case that a first symbol in the set of flexible symbols occurs within the predefined time gap relative to a last symbol of a control resource set where the terminal device detects the signaling, and monitor the UL transmission in the remain symbols from the subset of flexible symbols that occur outside of the predefined time gap in the case that the remain symbols is within the UL subband.
In some embodiments, the UL transmission may be the SRS transmission. In determining whether to monitor the UL transmission, the network device 120 may monitor the SRS transmission in at least one symbol from the subset of flexible symbols that occur within a predefined time gap, in the case that a first symbol in the set of flexible symbols occurs within the predefined time gap relative to a last symbol of a control resource set where the terminal device detects the signaling. The network device 120 may monitor the UL transmission in the remain symbols from the subset of flexible symbols that occur outside of the predefined time gap in the case that the UL transmission is within the UL subband.
In some embodiments, the terminal device may indicate a capability of partial cancellation in frequency domain. In determining whether to monitor the UL transmission, the network device 120 may monitor the UL transmission in a first physical resource blocks (PRB) in a set of PRBs for the UL transmission in the case that the first PRB is within the UL subband.
In some embodiments, the terminal device may not indicate a capability of partial cancellation in time domain. In determining whether to monitor the UL transmission, the network device 120 may configure a resource in the UL subband for the UL transmission, and monitor the UL transmission in at least one resource configured for the UL transmission in the UL subband in the case that the UL transmission is outside of the UL subband.
In some embodiments, a priority of the least one resource configured for the UL transmission in the UL subband may be lower than a priority of at least one resource for the UL transmission in a UL bandwidth part (BWP) . In determining whether to monitor the UL transmission, the network device 120 may monitor the UL transmission on the at least one resource in the UL BWP in the case that there is no collision between the DL symbols and the UL transmission, and monitor the UL transmission in the resource configured on the at least one resource in the UL subband in the case that there is a collision between the DL symbols and the UL transmission.
In some embodiments, a priority of the least one resource configured for the UL transmission in the UL subband may be higher than a priority of at least one resource for the UL transmission in a UL BWP. In determining whether to monitor the UL transmission, the network device 120 may monitor the UL transmission on the at least one resource in the UL subband regardless of whether there is a collision between the DL symbols and the UL transmission.
In some embodiments, the network device 120 may configure which one of the priority of the least one resource in the UL subband and the priority of the at least one resource in the UL BWP is higher, and transmit the priority of the least one resource in the UL subband and the priority of the at least one resource in the UL BWP to the terminal device.
In some embodiments, the UL transmission may be a first UL transmission, the UL subband may be a first UL subband, the set of flexible symbols may be a first set of flexible symbols. The network device 120 may further transmit a disable signaling indicating that the UL subband is disabled to the terminal device, determine whether to monitor the second UL transmission in the second set of flexible symbols in the absence of the second UL subband. Then the network device 120 may monitor the second UL transmission in the second set of flexible symbols in the case that the second UL transmission is determined to be performed. In some embodiments, the signaling may comprise downlink control information (DCI) , and the disable signaling may comprise DCI.
EXAMPLE APPARATUS
FIG. 8 illustrates a simplified block diagram of a device 800 that is suitable for implementing embodiments of the present disclosure. The device 800 can be considered as a further example implementation of the terminal device 110, and the network device 120 as shown in FIG. 1A. Accordingly, the device 800 can be implemented at or as at least a part of the network device 120.
As shown, the device 800 includes a processor 810, a memory 820 coupled to the processor 810, a suitable transmitter (TX) and receiver (RX) 840 coupled to the processor 810, and a communication interface coupled to the TX/RX 840. The memory 810 stores at least a part of a program 830. The TX/RX 840 is for bidirectional communications. The TX/RX 840 has at least one antenna to facilitate communication, though in practice an Access Node mentioned in this disclosure may have several ones. The communication interface may represent any interface that is necessary for communication with other network elements, such as X2 interface for bidirectional communications between eNBs or gNBs, S1 interface for communication between a Mobility Management Entity (MME) /Serving Gateway (S-GW) and the eNB or gNB, Un interface for communication between the eNB or gNB and a relay node (RN) , or Uu interface for communication between the eNB or gNB and a terminal device.
The program 830 is assumed to include program instructions that, when executed by the associated processor 810, enable the device 800 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to FIGS. 1-7. The embodiments herein may be implemented by computer software executable by the processor 810 of the device 800, or by hardware, or by a combination of software and hardware. The processor 810 may be configured to implement various embodiments of the present disclosure. Furthermore, a combination of the processor 810 and memory 820 may form processing means 850 adapted to implement various embodiments of the present disclosure.
The memory 820 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 820 is shown in the device 800, there may be several physically distinct memory modules in the device 800. The processor 810 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 800 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.
In some embodiments, an apparatus capable of performing the method 600 (for example, the terminal device 110) may comprise means for performing the respective steps of the method 600. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module. In some embodiments, the means comprises at least one processor and at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the performance of the method 600.
In some embodiments, an apparatus capable of performing the method 700 (for example, the network device 120) may comprise means for performing the respective steps of the method 700. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module. In some embodiments, the means comprises at least one processor and at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the performance of the method 700.
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. 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; and

a transceiver coupled to the processor,

wherein the processor is configured to:

receive, via the transceiver from a network device, a signaling indicating a subset of flexible symbols as downlink (DL) symbols or flexible symbols, wherein the subset of flexible symbols is from a set of flexible symbols configured with an uplink (UL) subband;

determine whether to perform a UL transmission in the set of flexible symbols based on determining whether the UL transmission is within the UL subband; and

perform, via the transceiver, the UL transmission in the set of flexible symbols in the case that the UL transmission is within the UL subband.
The terminal device of claim 1, wherein the UL transmission comprises one of the following:

a sounding reference signal (SRS) transmission;

a physical uplink control channel (PUCCH) transmission;

a physical uplink shared channel (PUSCH) transmission; or

a physical random access channel (PRACH) transmission.
The terminal device of claim 1, wherein the processor is further configured to:

cancel the UL transmission in the set of flexible symbols in the case that the UL transmission is outside of the UL subband.
The terminal device of claim 1, wherein the terminal device does not indicate a capability of partial cancellation in time domain, a first symbol in the set of flexible symbols occurs outside of a predefined time gap relative to a last symbol of a control resource set where the terminal device detects the signaling, and wherein determining whether to perform the UL transmission comprises:

performing, via the transceiver, the UL transmission in the flexible symbols in the case that the UL transmission is within the UL subband; and

canceling the UL transmission in the flexible symbols in the case that the UL transmission is outside the UL subband.
The terminal device of claim 1, wherein the terminal device indicates a capability of partial cancellation in time domain, and wherein determining whether to perform the UL transmission comprises:

performing, via the transceiver, the UL transmission in at least one symbol from the subset of flexible symbols that occur within a predefined time gap, in the case that a first symbol in the set of flexible symbols occurs within the predefined time gap relative to a last symbol of a control resource set where the terminal device detects the signaling;

performing, via the transceiver, the UL transmission in remain symbols from the subset of flexible symbols that occur outside of the predefined time gap in the case that the remain symbols is within the UL subband; and

canceling the UL transmission in the remain symbols from the subset of flexible symbols that occur outside of the predefined time gap in the case that the remain symbols is outside of the UL subband.
The terminal device of claim 1, wherein the UL transmission is the SRS transmission, and wherein determining whether to perform the UL transmission comprises:

performing, via the transceiver, the SRS transmission in at least one symbol from the subset of flexible symbols that occur within a predefined time gap, in the case that a first symbol in the set of flexible symbols occurs within the predefined time gap relative to a last symbol of a control resource set where the terminal device detects the signaling;

performing, via the transceiver, the UL transmission in the remain symbols from the subset of flexible symbols that occur outside of the predefined time gap in the case that the UL transmission is within the UL subband; and

canceling the UL transmission in the remain symbols from the subset of flexible symbols that occur outside of the predefined time gap in the case that the UL transmission is outside the UL subband.
The terminal device of claim 1, wherein the terminal device indicates a capability of partial cancellation in frequency domain, and wherein determining whether to perform the UL transmission comprises:

performing, via the transceiver, the UL transmission in a first physical resource blocks (PRB) in a set of PRBs for the UL transmission in the case that the first PRB is within the UL subband; and

canceling the UL transmission in a second PRB in the set of PRBs for the UL transmission in the case that the second PRB is outside of the UL subband.
The terminal device of claim 1, wherein the terminal device does not indicate a capability of partial cancellation in time domain, and wherein determining whether to perform the UL transmission comprises:

canceling the UL transmission in the flexible symbols in the case that the UL transmission is outside of the UL subband; and

performing, via the transceiver, the UL transmission in at least one resource configured for the UL transmission in the UL subband.
The terminal device of claim 8, wherein a priority of the least one resource configured for the UL transmission in the UL subband is lower than a priority of at least one resource for the UL transmission in a UL bandwidth part (BWP) , and wherein determining whether to perform the UL transmission comprises:

performing, via the transceiver, the UL transmission on the at least one resource in the UL BWP in the case that there is no collision between the DL symbols and the UL transmission; and

performing, via the transceiver, the UL transmission on the at least one resource in the UL subband in the case that there is a collision between the DL symbols and the UL transmission.
The terminal device of claim 8, wherein a priority of the least one resource configured for the UL transmission in the UL subband is higher than a priority of at least one resource for the UL transmission in a UL BWP, and wherein determining whether to perform the UL transmission comprises:

performing, via the transceiver, the UL transmission on the at least one resource in the UL subband regardless of whether there is a collision between the DL symbols and the UL transmission.
The terminal device of claim 9 or 10, wherein which one of the priority of the least one resource in the UL subband and the priority of the at least one resource in the UL BWP is higher is configure by a network device.
The terminal device of any of claims 1-10, wherein the UL transmission is a first UL transmission, the UL subband is a first UL subband, the set of flexible symbols is a first set of flexible symbols, and the processor is further configured to:

receive, via the transceiver from a network device, a disable signaling indicating that the UL subband is disabled for a second UL transmission;

determine whether to perform the second UL transmission in the second set of flexible symbols in the absence of the second UL subband;

perform, via the transceiver, the second UL transmission in the second set of flexible symbols in the case that the second UL transmission is determined to be performed; and

cancel the second UL transmission in the second set of flexible symbols in the case that the second UL transmission is determined not to be performed
The terminal device of claim 12, wherein the signaling comprises downlink control information (DCI) , and the disable signaling comprises DCI.
A network device comprising:

a processor; and

a transceiver coupled to the processor,

wherein the processor is configured to:

transmit, via the transceiver to a terminal device, a signaling indicating a subset of flexible symbols as downlink (DL) symbols or flexible symbols, wherein the subset of flexible symbols is from a set of flexible symbols configured with an uplink (UL) subband;

determine whether to monitor a UL transmission in the set of flexible symbols based on determining whether the UL transmission is within the UL subband; and

monitor the UL transmission in the set of flexible symbols in the case that the UL transmission is within the UL subband.
A method performed by a terminal device, comprising:

receiving, via the transceiver from a network device, a signaling indicating a subset of flexible symbols as downlink (DL) symbols or flexible symbols, wherein the subset of flexible symbols is from a set of flexible symbols configured with an uplink (UL) subband;

determining whether to perform a UL transmission in the set of flexible symbols based on determining whether the UL transmission is within the UL subband; and

performing, via the transceiver, the UL transmission in the set of flexible symbols in the case that the UL transmission is within the UL subband.