Method, apparatus, and system for downlink-uplink collision handling
By implementing collision-handling methods and apparatuses that prioritize and cancel transmissions based on detected collisions and timing thresholds, the inefficiencies in HD-FDD systems are addressed, enhancing network resource utilization and reducing unnecessary cancellations.
Patent Information
- Application Number
- PCT/CN2024/109409
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2026-02-05
AI Technical Summary
In half-duplex frequency division duplex (HD-FDD) wireless systems, downlink-uplink collisions occur due to timing advance (TA) mismatches, leading to inefficient resource utilization and unnecessary cancellation of transmissions.
Implement methods and apparatuses to cancel uplink or downlink transmissions based on collision conditions, using different procedures for collisions detected from the base station's and user equipment's perspectives, considering transmission priorities and timing thresholds.
Improves network resource utilization and reduces collisions by optimizing transmission and reception handling, ensuring efficient use of communication resources.
Smart Images

Figure CN2024109409_05022026_PF_FP_ABST
Abstract
Description
METHOD, APPARATUS, AND SYSTEM FOR DOWNLINK-UPLINK COLLISION HANDLINGTECHNICAL FIELD
[0001] The present disclosure relates generally to wireless communications. Particularly, it relates to a method, apparatus, and system for downlink-uplink collision handling.BACKGROUND
[0002] Half-duplex frequency division duplex (HD-FDD) is a type of frequency division duplex (FDD) in which the uplink (UL) and downlink (DL) operate on different frequencies, but not at the same time. This approach can eliminate the need for a duplex filter in the receiver. In wireless systems, the timing advance (TA) value represents the time it takes for a signal to travel from a user equipment (UE) to the base station. Since users are located at different distances from the base station and radio waves travel at a finite speed, the exact arrival time of a signal within a slot can be used by the base station to determine the distance to the UE. To prevent collisions with signals from adjacent users, the time at which the UE is allowed to transmit a burst of traffic within a timeslot must be adjusted accordingly. TA can be used to control this adjustment.SUMMARY
[0003] One or more implementations of the present application provide communication methods and communication apparatuses. The techniques described in the application can improve the performance for downlink-uplink collision handling. In particular, the techniques described in the application can improve the network’s resource utilization, reduce collisions, avoid unnecessary cancelations of some uplink transmission and / or downlink reception etc. Other benefits will be clear from other parts of the application.
[0004] According to a first aspect, a method is provided. The method includes when a first condition occurs, performing at least one of the following: cancelling a first uplink transmission or a first downlink reception, or cancelling a second uplink transmission or a second downlink reception, where the first condition includes a first collision and at least one of a second collision or a third collision, where the first collision is a collision between the first uplink transmission and the second downlink reception, the second collision is a collision between the first uplink transmission and the first downlink reception according to a second procedure, and the third collision is a collision between the second uplink transmission and the second downlink reception.
[0005] With reference to the first aspect, in some implementations, the cancelling a first uplink transmission or a first downlink reception comprising: cancelling the first uplink transmission or the first downlink reception according to a first procedure.
[0006] With reference to the first aspect, in some implementations, the cancelling a second uplink transmission or a second downlink reception comprising: cancelling the second uplink transmission or the second downlink reception according to the first procedure.
[0007] With reference to the first aspect, in some implementations, where the first collision is a collision between the first uplink transmission and the second downlink reception according to the first procedure, the second collision is a collision between the first uplink transmission and the first downlink reception according to a second procedure, and the third collision is a collision between the second uplink transmission and the second downlink reception according to the second procedure.
[0008] With reference to the first aspect, in some implementations, the first collision includes the first uplink transmission overlapping with the second downlink reception in time domain according to the first procedure or a time duration between the first uplink transmission and the second downlink reception being less than a first threshold according to the first procedure.
[0009] With reference to the first aspect, in some implementations, the first procedure is a procedure that the first uplink transmission collides with the second downlink reception based on the assumed / last reported TA value from the base station perspective. With reference to the first aspect, in some implementations, the second collision includes the first uplink transmission overlapping with the first downlink reception in time domain according to the second procedure or a time duration between the first uplink transmission and the first downlink reception being less than a second threshold according to the second procedure.
[0010] With reference to the first aspect, in some implementations, the second procedure is a procedure that the first uplink transmission collides with the first downlink reception based on the actual TA value from the UE perspective.
[0011] With reference to the first aspect, in some implementations, the third collision includes the second uplink transmission overlapping with the second downlink reception in time domain according to the second procedure or a time duration between the second uplink transmission and the second downlink reception is less than a third threshold according to the second procedure.
[0012] With reference to the first aspect, in some implementations, the second procedure is a procedure that the second uplink transmission collides with the second downlink reception based on the actual TA value from the UE perspective.
[0013] With reference to the first aspect, in some implementations, each of the first uplink transmission and the second uplink transmission includes at least one of a sounding reference signal (SRS) , a physical uplink shared channel (PUSCH) , or a physical uplink control channel (PUCCH) .
[0014] With reference to the first aspect, in some implementations, the first procedure is based on a last reported timing advance (TA) value or an obtained TA value, and the second procedure is based on a current TA value.
[0015] With reference to the first aspect, in some implementations, at least one of the first uplink transmission, the second uplink transmission, the first downlink reception, or the second downlink reception is between a user equipment (UE) and a non-terrestrial network (NTN) base station.
[0016] With reference to the first aspect, in some implementations, cancelling the first uplink transmission or the second uplink transmission includes cancelling a portion of the first uplink transmission or a portion of the second uplink transmission, and where the first uplink transmission or the second uplink transmission includes an SRS transmission.
[0017] With reference to the first aspect, in some implementations, the first downlink reception includes a synchronization signal block (SSB) , and the first uplink transmission is cancelled.
[0018] With reference to the first aspect, in some implementations, the first condition includes the first collision and the second collision, where the first downlink reception is semi-statically configured, the first uplink transmission is semi-statically configured, and the second downlink reception is dynamically scheduled, where the first uplink transmission has a higher priority than that of the first downlink reception, and where the performing includes cancelling the first uplink transmission.
[0019] With reference to the first aspect, in some implementations, the first condition includes the first collision and the third collision, where the first uplink transmission is semi-statically configured, the second downlink reception is dynamically scheduled, and the second uplink transmission is dynamically scheduled, where the second uplink transmission has a higher priority than that of the second downlink reception, and where the performing includes cancelling the second uplink transmission.
[0020] With reference to the first aspect, in some implementations, the first condition includes the first collision and the second collision, where the first downlink reception is dynamically scheduled, the first uplink transmission is dynamically scheduled, and the second downlink reception is semi-statically configured, where the first downlink reception has a higher priority than that of the first uplink transmission, and where the performing includes cancelling the first downlink reception.
[0021] With reference to the first aspect, in some implementations, the first condition includes the first collision and the third collision, where the first uplink transmission is dynamically scheduled, the second downlink reception is semi-statically configured, and the second uplink transmission is semi-statically configured, where the second downlink reception has a higher priority than that of the second uplink transmission, and where the performing includes cancelling the second downlink reception.
[0022] With reference to the first aspect, in some implementations, the first condition includes the first collision and the second collision, where the first downlink reception is semi-statically configured, the first uplink transmission is dynamically scheduled, and the second downlink reception includes an SSB, and where the performing includes cancelling the first uplink transmission. Optionally, the first uplink transmission has a higher priority than that of the first downlink reception.
[0023] With reference to the first aspect, in some implementations, the first condition includes the first collision and the second collision, where the first downlink reception is dynamically scheduled, the first uplink transmission is dynamically scheduled, and the second downlink reception includes an SSB, where the first uplink transmission has a higher priority than that of the first downlink reception, and where the performing includes cancelling the first uplink transmission.
[0024] With reference to the first aspect, in some implementations, the first condition includes the first collision and the third collision, where the first uplink transmission is dynamically scheduled, the second downlink reception includes an SSB, and the second uplink transmission is dynamically scheduled or semi-statically configured, and where the performing includes cancelling the second uplink transmission.
[0025] With reference to the first aspect, in some implementations, the first condition includes the first collision and the second collision, where the first downlink reception is semi-statically configured, the first uplink transmission is semi-statically configured, and the second downlink reception includes an SSB, where the first uplink transmission has a higher priority than that of the first downlink reception, and where the performing includes cancelling the first uplink transmission.
[0026] With reference to the first aspect, in some implementations, the first condition includes the first collision and the third collision, where the first uplink transmission is semi-statically configured, the second downlink reception includes an SSB, and the second uplink transmission is dynamically scheduled or semi-statically configured, and where the performing includes cancelling the second uplink transmission.
[0027] According to a second aspect, a communication apparatus is provided. The communication apparatus is configured to perform the method according to the first aspect or one or more implementations of the first aspect.
[0028] With reference to the second aspect, in some implementations, the communication apparatus includes processing unit, configured to, when a first condition occurs, perform at least one of the following: cancelling a first uplink transmission or a first downlink reception according to a first procedure, or cancelling a second uplink transmission or a second downlink reception according to the first procedure, where the first condition includes a first collision and at least one of a second collision or a third collision, where the first collision is a collision between the first uplink transmission and the second downlink reception according to the first procedure, the second collision is a collision between the first uplink transmission and the first downlink reception according to a second procedure, and the third collision is a collision between the second uplink transmission and the second downlink reception according to the second procedure.
[0029] With reference to the second aspect, in some implementations, the communication apparatus includes one or more processors, configured to, when a first condition occurs, perform at least one of the following: cancelling a first uplink transmission or a first downlink reception according to a first procedure, or cancelling a second uplink transmission or a second downlink reception according to the first procedure, where the first condition includes a first collision and at least one of a second collision or a third collision, where the first collision is a collision between the first uplink transmission and the second downlink reception according to the first procedure, the second collision is a collision between the first uplink transmission and the first downlink reception according to a second procedure, and the third collision is a collision between the second uplink transmission and the second downlink reception according to the second procedure.
[0030] According to a fourth aspect, an apparatus is provided. The apparatus includes one or more processors and one or more memories. The one or more memories store instructions which, when executed by the one or more processors, cause the apparatus to perform the method according to the first aspect or one or more implementations of the first aspect.
[0031] According to a fifth aspect, a communication system is provided. The communication system includes a communication apparatus configured to perform the method according to the first aspect or one or more implementations of the first aspect.
[0032] According to a sixth aspect, a non-transitory computer-readable storage medium is provided. The non-transitory computer-readable storage has instructions stored thereon which, when executed by an apparatus, cause the apparatus to perform the method according to the first aspect or one or more implementations of the first aspect.BRIEF DESCRIPTION OF THE DRAWINGS
[0033] FIG. 1 is a schematic illustration of an example communication system according to an implementation of the present disclosure.
[0034] FIG. 2 illustrates another example communication system according to an implementation of the present disclosure.
[0035] FIG. 3 is a schematic illustration showing an apparatus wirelessly communicating with another apparatus within a communication system according to an implementation of the present disclosure.
[0036] FIG. 4 illustrates an example apparatus according to an implementation of the present disclosure.
[0037] FIG. 5 illustrates another example apparatus according to an implementation of the present disclosure.
[0038] FIG. 6 illustrates a schematic illustration of an example non-terrestrial communication system providing non-terrestrial new radio (NR) access to a UE.
[0039] FIG. 7 illustrates an example timing between DL and UL at the UE.
[0040] FIG. 8 illustrates a schematic illustration of an example communication system including both terrestrial transmit and receive points (TRPs) and non-terrestrial TRPs.
[0041] FIG. 9 illustrates a schematic illustration of another example communication system including both terrestrial TRPs and non-terrestrial TRPs.
[0042] FIG. 10 illustrates a schematic illustration of yet another example non-terrestrial communication system including both terrestrial TRPs and non-terrestrial TRPs.
[0043] FIG. 11 illustrates example actual collisions at the UE and example perceived virtual collisions at a terrestrial TRP.
[0044] FIG. 12 illustrates an example of resource waste and lack of scheduling flexibility when a terrestrial TRP attempts to avoid DL-UL collisions at the UE side due to TA mismatch between UE and a terrestrial TRP.
[0045] FIG. 13 illustrates example conflicts between the collision handling rules if an UL transmission or a DL reception is in common between the actual and virtual collisions.
[0046] FIG. 14 illustrates example conflicting priorities that may be encountered at UE for UL transmission / DL reception in common between an actual collision and a virtual collision.
[0047] FIG. 15 illustrates example conflicting priorities for UL transmission / DL reception in common between an actual collision and a virtual collision of Case 1.
[0048] FIGS. 16-17 illustrate example conflicting priorities for UL transmission / DL reception in common between an actual collision and a virtual collision of Case 2.
[0049] FIGS. 18-20 illustrate example conflicting priorities for UL transmission / DL reception in common between an actual collision and a virtual collision of Case 5.
[0050] FIGS. 21-22 illustrate example conflicting priorities for UL transmission / DL reception in common between an actual collision and a virtual collision of Case 5 or Case 7.
[0051] FIG. 23 illustrates example conflicting priorities for UL transmission / DL reception in common between an actual collision and a virtual collision of Case 6 or Case 7.DETAILED DESCRIPTION
[0052] FIG. 1 is a schematic illustration of an example communication system 100 according to an implementation of the present disclosure. There is shown a communication system 100 that includes a radio access network (RAN) 120, one or more communication electronic devices (EDs) 110a, 110b, 110c, 110d, 110e, 110f, 110g, 110h, 110i, 110j (collectively referred to as 110) , a core network 130, a Public Switched Telephone Network (PSTN) 140, the Internet 150, and other networks 160. The RAN 120 may include, but is not limited to, a future generation RAN, or a legacy RAN such as, but not limited to, 5th generation (5G) , 4th generation (4G) , 3rd generation (3G) or 2nd generation (2G) radio access network. The RAN 120 may be, for example, an Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN) , a NextGen RAN (NG RAN) , or some other type of RAN. Examples of RAN 120 based on the evolution of telecommunications standards include, but is not limited to, GSM (Global System for Mobile Communications) and CDMA (Code Division Multiple Access) for 2G, UMTS (Universal Mobile Telecommunications System) based on WCDMA (Wideband Code Division Multiple Access) and CDMA2000 for 3G, LTE (Long-Term Evolution) and WiMAX (Worldwide Interoperability for Microwave Access) for 4G, and NR (New Radio) for 5G. In some implementations, The RAN 120 may use any radio access technology (RAT) in the wireless interface between the one or more EDs 110 and the RAN 120. In some implementations, the term “radio access” may refer to the future generation air interface standards which may include both terrestrial networks (TNs) and non-terrestrial networks (NTNs) . These networks will be described in greater detail below in conjunction with various implementations. The one or more communication EDs 110 (also referred to as “user equipment” ) are configured to connect (e.g., communicatively couple) with each other or to one or more network nodes 170a, 170b (collectively referred to as 170) in the RAN 120. The core network (CN) 130 is a part of the communication system 100 and consists of network nodes (e.g., 170a, 170b) which provide support for the network features and telecommunication services. In some implementations, the CN 130 may be dependent on the RAT used in the communication system 100. In other implementations, the CN 130 may be access-agnostic, i.e., the CN 130 may be independent of the RAT used in the communication system 100. There are different types of CN 130, for different 3GPP system generations. For example, the CN 130 is the Evolved Packet Core (EPC) in 4G, also known as the Evolved Packet System (EPS) . In another example, the CN 130 is the 5G Core (5GC) which was developed as part of the 5G System (5GS) . The CN 130 also enables integration of different 3GPP and non-3GPP access types. In some implementations and referring to FIG. 1, the CN 130 also provides the interface towards external networks that may include the PSTN 140, the Internet 150, and other networks 160 in the communication system 100.
[0053] In general, the communication system 100 facilitates interaction between multiple wireless or wired elements. The communication system 100 may transmit different types of content, such as voice, data, video, and / or text, through different transmission methods such as, but not limited to, broadcast, multicast, groupcast, and unicast. Additionally, the communication system 100 operates by allocating and / or sharing resources, such as carrier spectrum bandwidth, among its constituent elements.
[0054] The communication system 100 may provide a wide range of communication services and applications including, but not limited to, Enhanced Mobile Broadband (eMBB) services, Ultra-Reliable Low-Latency Communication (URLLC) services, Massive Machine Type Communication (mMTC) services, Integrated Sensing And Communication (ISAC) , immersive communication, Ultra-massive Machine-Type Communication (uMTC) , hyper reliable and low-latency communication, ubiquitous connectivity, integrated AI and communication, and other services that can be provided by a future generation communication system. The communication system 100 may provide other services and applications such as, but not limited to, earth monitoring, remote sensing, passive sensing and positioning, navigation and tracking, autonomous delivery and mobility and the like.
[0055] The communication system 100 may include a terrestrial communication system (or network) and / or a non-terrestrial communication system (or network) . The communication system 100 may provide a high degree of availability and robustness through a joint operation of the terrestrial communication system and the non-terrestrial communication system. For example, integrating a non-terrestrial communication system (or components thereof) into a terrestrial communication system can result in a heterogeneous network including multiple layers. The heterogeneous network may achieve better overall performance through efficient multi-link joint operation, more flexible functionality sharing, and faster physical layer link switching between terrestrial networks and non-terrestrial networks. The terrestrial communication system and the non-terrestrial communication system could be considered as sub-systems of the communication system 100.
[0056] FIG. 2 illustrates another example communication system 100 according to an implementation of the present disclosure. As shown, the communication system 100 includes EDs 110a, 110b, 110c, 110d (collectively referred to as ED 110) , RANs 120a, 120b, one or more CNs 130, a PSTN 140, the Internet 150, and other networks 160. Additionally, the communication system 100 may also include a non-terrestrial network (NTN) 120c. The RANs 120a and120b may include network nodes 170a and 170b respectively. Examples of network nodes 107a, 107b include base stations, which can be generally referred to as terrestrial network (TN) devices or terrestrial transmit and receive points (T-TRPs) 170a and 170b (collectively referred to as 170) . In this context, the terms "TRP" and "base station" are used interchangeably unless otherwise specified. For simplicity, this disclosure primarily refers to network nodes as base stations; however, unless explicitly stated otherwise, references to TRP are considered non-limiting and interchangeable. The T-TRPs 170a, 170b may be base stations mounted on a building or tower. In one implementation, the NTN 120c includes a RAN node such as a base station 172, which may be generally referred to as an NTN device, a non-terrestrial node, a non-terrestrial network device, a non-terrestrial base station, or a non-terrestrial transmit and receive point (NT-TRP) 172.
[0057] In some implementations, the NT-TRP 172 is not attached to the ground, for example, as in the case of an airborne base station. An airborne base station may be implemented using communication equipment supported or carried by a flying device. For example, a flying device may include, but is not limited to, an airborne platform (such as a blimp or an airship) , balloon, drone (such as quadcopter) , and other types of aerial vehicles. In some implementations, an airborne base station may be supported or carried by an unmanned aerial system (UAS) or an unmanned aerial vehicle (UAV) , such as a drone. An airborne base station may be a moveable or mobile base station that can be flexibly deployed in different locations to meet network demand. A satellite base station is another example of a non-terrestrial base station. A satellite base station may be implemented using communication equipment supported or carried by a satellite. A satellite base station may also be referred to as an orbiting base station. High altitude platforms are yet another example of non-terrestrial base stations, including international mobile telecommunication base stations.
[0058] As referred to herein, and unless specified otherwise, a “TRP” may also refer to a T-TRP or an NT-TRP, a “T-TRP” may also refer to a “TN TRP” , and an “NT-TRP” may also refer to an “NTN TRP” . The NTN 120c may be considered a RAN, sharing operational aspects with RANs 120a, 120b. The NTN 120c may include at least one NTN device and at least one corresponding terrestrial network device. The at least one NTN device may function as a transport layer device and the at least one corresponding terrestrial network device may function as a RAN node, communicating with the ED 110 via the NTN device. Additionally, there may be an NTN gateway on the ground (referred to as a terrestrial network device) that also functions as a transport layer device facilitating communication with both the NTN device and the RAN node. The RAN node may communicate with the ED 110 via the NTN device and the NTN gateway. In some implementations, the NTN gateway and the RAN node may be located within the same device.
[0059] A base station 170 (also referred to as a TRP as stated above) is a network element within a radio access network responsible for radio transmission and reception in one or more cells to or from the ED (such as a user equipment) . In different implementations, the base station 170 may also be known as a base transceiver station (BTS) , a radio base station, a network node, a network device, a device on the network side, a transmit / receive node, a Node B, an evolved NodeB (eNodeB or eNB) , a Home eNodeB, a next Generation NodeB (gNB) , a transmission point (TP) , a site controller, an access point (AP) , a wireless router, a relay station, a terrestrial node, a terrestrial network device, a terrestrial base station, a non-terrestrial node, a non-terrestrial network device, a non-terrestrial base station, and a positioning node, among other possibilities. The base station 170 may be a macro base station (BS) , a pico BS, a relay node, a donor node, or combinations thereof. When the base station 170 performs (or is configured to perform) a method described herein, it may be interpreted as the base station itself, one or more modules (or units) in the base station, a circuit or chip, or a combination thereof, performing the method. For example, the circuit or chip may include a modem chip, also referred to as a baseband chip, a system on chip (SoC) including a modem core, system in package (SIP) ) , and the like, and may be responsible for one or more communication functions within the base station.
[0060] The EDs 110a-110d and TRPs 170a-170b, 172 are examples of communication equipment configured to implement some or all of the operations and / or implementations described herein. The T-TRP 170a forms part of the RAN 120a, which may include other TRPs, and / or other devices. Also, the TRP 170b forms part of the RAN 120b, which may include other TRPs, and / or devices. Each TRP 170a, 170b may transmit and / or receive wireless signals within a particular geographic region or area, sometimes referred to as a “cell” or a “coverage area. ” The TRPs 170a-170b may be responsible for allocating and / or configuring resources and transmission and / or reception in a set of cell (s) . A cell is a radio network object that can be uniquely identified by a cell identification that is broadcasted over a geographical region or area from base stations associated with the cell. A cell can work in either FDD or TDD mode. A cell may be further divided into cell sectors, and a base station 170a-170b may, for example, employ one or more transceivers to provide services to one or more sectors. Some implementations may include pico or femto cells if supported by the radio access technology. In some implementations, one or more transceivers could be used for each cell, such as with Multiple-Input Multiple-Output (MIMO) technology. The number of RANs 120a-120b shown is merely an example. Any number of RANs may be contemplated when designing the communication system 100.
[0061] A base station may be a single element, as shown in the figures, or multiple elements distributed throughout the corresponding RAN, or otherwise configured. In some implementations, a plurality of RAN nodes coordinate to assist the ED 110 in implementing radio access, and different RAN nodes separately implement and handle different functions of the base station. For example, the RAN node may be a central unit (CU) , a distributed unit (DU) , a CU-control plane (CP) , a CU-user plane (UP) , or a radio unit (RU) etc. The CU and the DU may be separately deployed, or included within the same element (i.e., a baseband unit (BBU) ) . The RU may be included in a radio frequency device or a radio frequency unit (i.e., a remote radio unit (RRU) , an active antenna unit (AAU) , or a remote radio head (RRH) ) . In different systems, the CU (or the CU-CP and the CU-UP) , the DU, or the RU may be known by different names, but their functions are understood by person skilled in the art. For example, in an open radio access network (ORAN) system, a CU may be referred to as an open CU (O-CU) , a DU may be referred to as an open DU (O-DU) , and a CU-CP may be referred to as an open CU-CP (O-CU-CP) . The CU-UP may also be referred to as an open CU-UP (O-CU-UP) , and the RU may also be referred to as an open RU (O-RU) . Any one of the CU (or the CU-CP, the CU-UP) , the DU, and the RU may be implemented using a software module, a hardware module, or a combination of a software module and a hardware module.
[0062] Furthermore, communication between different devices / apparatuses in various implementations of this disclosure may refer to direct communication (that is, without the need of forwarding by another device / apparatus) , or may refer to communication (s) between different devices / apparatuses via another device / apparatus (that is, requiring forwarding by another device / apparatus) . Alternatively, such communication (s) may involve one functional unit inside a device / apparatus using another functional unit within the device / apparatus to communicate with another device / apparatus. In other words, phrases such as "sending (or transmitting) information to... (an ED or a base station) " in this disclosure may be understood as a destination endpoint of the information being an ED or a base station, including, sending / transmitting information directly or indirectly to an ED or a base station. Similarly, phrases like "receiving information from... (an ED or a base station) " may be understood as a source endpoint of the information being an ED or a base station, including directly or indirectly receiving information from an ED or a base station. Between the source endpoint that sends the information and the destination endpoint, necessary processing such as, but not limited to, format conversion, digital-to-analog conversion, amplification, and filtering may be performed on the information. However, the destination endpoint may understand valid information from the source endpoint. A similar understanding applies to other descriptions in this disclosure without reiterating details already described. In the present disclosure, the terms "send" and "transmit" may be used interchangeably in different implementations of this disclosure.
[0063] The ED 110 is used to connect people, objects, machines, and other entities. The ED 110 may be widely used in various scenarios including, but not limited to, cellular communications, device-to-device (D2D) , vehicle to everything (V2X) , peer-to-peer (P2P) , machine-to-machine (M2M) , MTC, internet of things (IoT) , virtual reality (VR) , augmented reality (AR) , mixed reality (MR) , metaverse, digital twin, industrial control, self-driving, remote medical, smart grid, smart furniture, smart office, smart wearable, smart transportation, smart city, drones, robots, remote sensing, passive sensing, positioning, navigation and tracking, and autonomous delivery and mobility.
[0064] Each ED 110 represents any suitable end user device for wireless operation and may include such devices (or may be referred to as, but not limited to) a user equipment (UE) or a user device or a terminal device, a wireless transmit / receive unit (WTRU) , a mobile station, a fixed or mobile subscriber unit, a cellular telephone, a station (STA) , an MTC device, a personal digital assistant (PDA) , a smartphone, a laptop, a computer, a tablet, a wireless sensor, a consumer electronics device, a smart book, a vehicle, a car, a truck, a bus, a train, or an IoT device, wearable devices (such as a watch, a pair of glasses, head mounted equipment, etc. ) , an industrial device, or an apparatus (such as a module, modem, or chip) in the forgoing devices, among other possibilities. Future generation EDs 110 may be referred to by other terms. When an ED 110 performs (or is configured to perform) a method described herein, it may be interpreted as the ED itself, one or more modules (or units) in the ED, a circuit or chip, or a combination thereof, performing the method. For example, the circuit or chip may include a modem chip, also referred to as a baseband chip, a system on chip (SoC) including a modem core, or system in package (SIP) ) , and the like, and may be responsible for one or more communication functions in the ED.
[0065] Each ED 110 connected to TRPs 170a-170b, and / or TRPs 172 can be dynamically or semi-statically turned-on (i.e., established, activated, or enabled) , turned-off (i.e., released, deactivated, or disabled) and / or configured in response to one of more of: connection availability and connection necessity.
[0066] Any ED 110 may be alternatively or additionally configured to interface, access, or communicate with any of the TRPs 170a, 170b and 172, the Internet 150, the CN 130, the PSTN 140, the other networks 160, or any combination thereof. In some examples, the ED 110a may communicate an uplink (UL) and / or downlink (DL) transmission over a terrestrial air interface 190a with station-TRP 170a. In some examples, the EDs 110a, 110b, 110c, and 110d may also communicate directly with one another via one or more sidelink (SL) air interfaces 190b. In some examples, the EDs 110a, 110d may communicate using an UL and / or DL transmission over a non-terrestrial air interface 190c with NT-TRP 172.
[0067] An air interface (such as, for example, 190a, 190b, 190c) generally includes a number of components and associated parameters that collectively specify how a transmission is to be sent and / or received over a wireless communications link between two or more communicating devices such as EDs and base station (s) . For example, an air interface may include one or more components defining the waveform (s) , frame structure (s) , multiple access scheme (s) , protocol (s) , coding scheme (s) and / or modulation scheme (s) for conveying information (such as, data) over a wireless communications link. The air interfaces 190a and 190b may use similar communication technology, that may include any suitable radio access technology.
[0068] The non-terrestrial air interface 190c can enable communication between the EDs 110a, 110d and one or more NT-TRPs 172 via a wireless link or simply a link. For some examples, the link is a dedicated connection for unicast transmission, a connection for broadcast transmission, or a connection between a group of EDs 110 and one or more NT-TRPs 172 for multicast transmission.
[0069] The TRPs 170a-170b, 172 may communicate with one another over one or more air interfaces 190e, 190f using wireless communication links (such as radio frequency (RF) , microwave, infrared (IR) , etc. ) or wired communication links. The air interfaces 190e, 190f may utilize any suitable radio access technology, and may be substantially similar to the air interfaces 190a, 190c over which the EDs 110a-110d communicate with one or more of the TRP 170a-170b, 172 or they may be substantially different. For example, the communication system 100 may implement one or more channel access methods, such as Time Division Multiple Access (TDMA) , Frequency Division Multiple Access (FDMA) , Code Division Multiple Access (CDMA) , Single Carrier Frequency Division Multiple Access (SC-FDMA) , Low Density Signature Multicarrier Code Division Multiple Access (LDS-MC-CDMA) , Non-Orthogonal Multiple Access (NOMA) , Pattern Division Multiple Access (PDMA) , Lattice Partition Multiple Access (LPMA) , Resource Spread Multiple Access (RSMA) , and Sparse Code Multiple Access (SCMA) .
[0070] The RANs 120a and 120b are in communication with the CN 130 to provide the EDs 110a 110b, and 110c with various services such as voice, data, multimedia, and other services. The RANs 120a and 120b and / or the CN 130 may be in direct or indirect communication with one or more other RANs (not shown) , which may or may not be directly served by the CN 130, and may employ different radio access technologies from RAN 120a and / or RAN 120b. The CN 130 may also serve as a gateway access between (i) the RANs 120a and 120b and / or the EDs 110a 110b, and 110c, and (ii) other networks (such as the PSTN 140, the Internet 150, and the other networks 160) . In addition, some or all of the EDs 110a 110b, and 110c may include functionality for communicating with different wireless networks over different wireless links using different wireless technologies and / or protocols. For example, the EDs 110a 110b, and 110c communicate using different cellular communications protocols, such as, but not limited to, a Global System for Mobile Communications (GSM) protocol, a code-division multiple access (CDMA) network protocol, a Push-to-Talk (PTT) protocol, a PTT over Cellular (POC) protocol, a Universal Mobile Telecommunications System (UMTS) protocol, a 3GPP Long Term Evolution (LTE) protocol, a fifth generation (5G) protocol, a New Radio (NR) protocol, and the like. Instead of wireless communication (or in addition thereto) , the EDs 110a 110b, and 110c may communicate using wired communication channels to a service provider or switch (not shown) , and / or to the Internet 150. The PSTN 140 may include circuit switched telephone networks for providing plain old telephone service (POTS) . The Internet 150 may include a network of computers and subnets (intranets) or both, and incorporate protocols, such as internet protocol (IP) , transmission control protocol (TCP) , user datagram protocol (UDP) . EDs 110a 110b, and 110c may be multimode devices capable of operation according to multiple radio access technologies, and may incorporate one or multiple transceivers necessary to support such.
[0071] In addition, the communication system 100 may include a sensing agent (not shown) to manage the sensed data from ED 110 and / or any one of TRPs 170a, 170b, 172. In one implementation, the sensing agent may be part of any one of TRPs 170a, 170b, 172. In another implementation, the sensing agent is a separate node that can communicate with the CN 130 and / or the RAN 120 (such as any one of TRPs 170a, 170b, 172) .
[0072] FIG. 3 is a schematic illustration showing an apparatus 310 wirelessly communicating with another apparatus 320 within a communication system (e.g., the communication system 100) according to an implementation of the present disclosure. The apparatus 310 may be an electronic device (such as ED 110) . The apparatus 320 may be a network node (e.g., the network node 170) such as T-TRP 170 or an NT-TRP 172. Although only one apparatus 310, and one apparatus 320 are shown in the figure, the number of apparatus 310 and / or number of apparatus 320 can vary, potentially including one or more of each. For example, a single ED 110 may be served by a single T-TRP 170 (or a single NT-TRP 172) , or by multiple T-TRPs 170 (or multiple NT-TRPs 172) . Similarly, a single ED 110 may be served by one or more T-TRPs 170 and one or more NT-TRPs 172. Similarly, a single T-TRP 170 (or a single NT-TRP 172) may serve one or more EDs 110.
[0073] The apparatus 310 may include one or more processors 210. For clarity and to avoid overcrowding the illustration, only a single processor 210 is illustrated. The apparatus 310 may further include a transmitter 201 and a receiver 203 coupled to one or more antennas 204. For clarity, only a single antenna 204 is illustrated. One, some, or all of the antennas 204 may alternatively be panels. In some implementations, the transmitter 201 and the receiver 203 are separate from each other. In other implementations, the transmitter 201 and the receiver 203 may be integrated into a single unit, for example, as a transceiver. The transceiver is configured to modulate data or other content for transmission by the one or more antennas 204 or a network interface controller (NIC) . The transceiver may also be configured to demodulate data or other content received by the one or more antennas 204. A transceiver may include any suitable structure for generating signals for wireless or wired transmission and / or for processing signals received through wireless or wired communication. Each antenna 204 includes any suitable structure for transmitting and / or receiving wireless or wired signals. The apparatus 310 may include a memory 208. In some implementations, the apparatus 310 may include multiple memories 208. Only a single transmitter 201, receiver 203, processor 210, memory 208, and antenna 204 is illustrated for simplicity, but the apparatus 310 may include one or more other components. In some implementations of the present disclosure, the transceiver (or transmitter 201 and / or receiver 203) may be viewed as an interface circuit.
[0074] The memory 208 is configured to store instructions used to perform operations described herein. The memory 208 may also be configured to store data that is used, generated, or collected by the apparatus 310. For example, the memory 208 can store software instructions or modules configured to implement some or all of the functionalities and / or operations described herein and that which are executed by the one or more processors 210.
[0075] The apparatus 310 may further include one or more input / output devices (not shown) or interfaces. The input / output devices or interfaces facilitate interaction with a user or other devices in the network. Each input / output device or interface includes suitable components for facilitating transmission of information to a user and reception of information from a user, and for various network interface communications. Such components may include, but are not limited to, a speaker, microphone, keypad, keyboard, display, touch screen, and the like.
[0076] The processor 210 may be configured to perform (or control the apparatus 310 to perform) operations (or methods) described herein as being performed by the apparatus 310. For example, the processor 210 performs or controls the apparatus 310 to perform the operations of: a) receiving one or more transport blocks (TBs) , b) using a resource for decoding at least one of the received TBs, c) releasing the resource for decoding another of the received TBs, and / or d) receiving configuration information configuring a resource. Specifically, the operations may include tasks related to: preparing a transmission for UL transmission to the apparatus 320, processing DL transmissions received from the apparatus 320, and handling SL transmission to and from another apparatus 310. Processing operations related to preparing a transmission for UL transmission may include operations such as, but not limited to, encoding, modulating, transmit beamforming, and generating symbols for transmission. Processing operations related to processing DL transmissions may include operations such as, but not limited to, receive beamforming, demodulating and decoding received symbols. Processing operations related to processing SL transmissions may include operations such as, but not limited to, transmit / receive beamforming, modulating / demodulating and encoding / decoding symbols. Depending upon the implementation, a DL transmission may be received by the receiver 203, possibly using receive beamforming, and the processor 210 may extract signaling from the DL transmission (such as by detecting and / or decoding the signaling) . An example of signaling may be a reference signal transmitted by the apparatus 320. In some implementations, the processor 210 implements the transmit beamforming and / or the receive beamforming based on the indication of beam direction, such as beam angle information (BAI) , received from the apparatus 320. In some implementations, the processor 210 may be configured to perform operations relating to network access (such as initial access) and / or downlink synchronization, which includes operations for detecting a synchronization sequence, decoding and obtaining the system information, and the like. In some implementations, the processor 210 may perform channel estimation, such as using a reference signal received from the apparatus 320.
[0077] Although not illustrated, in some implementations, the processor 210 may either be a part of the transmitter 201 or a part of the receiver 203 or a part of both the transmitter 201 and the receiver 203. Although not illustrated, in some implementations, the memory 208 may be a part of the processor 210.
[0078] The processor 210, along with the processing components of the transmitter 201 and the receiver 203 may each be implemented by one or more processors that may the same or different. These processors are configured to execute instructions stored in a memory (such as in the memory 208) .
[0079] The apparatus 320 includes one or more processors 260 (only one processor 260 is illustrated) . The apparatus 320 may further include one or more transmitters 252 and one or more receivers 254 coupled to one or more antennas 256. Only a single antenna 256 is illustrated to avoid clutter in the illustration. One, some, or all of the antennas 256 may alternatively be panels. In some implementations, the transmitter 252 and the receiver 254 are separate from each other. In other implementations, the transmitter 252 and the receiver 254 may be integrated into a single unit such as, for example, as a transceiver. The apparatus 320 may further include a memory 258. In some implementations, the apparatus 320 may include multiple memories 258. The apparatus 320 may further include a scheduler 253. Only a single transmitter 252, receiver 254, processor 260, memory 258, antenna 256 and scheduler 253 are illustrated for simplicity, however the apparatus 320 may include one or more other components. In the present disclosure, in some implementations, the transceiver (or transmitter 252 and / or receiver 254) may be viewed as an interface circuit.
[0080] In some implementations, various components of the apparatus 320 may be distributed. For example, some of the modules of the apparatus 320 may be located remotely from the equipment housing the antennas 256 for the apparatus 320 (and therefore also can be viewed as one or more nodes) . These modules, which can be considered as one or more nodes, may be coupled to the equipment that houses the antennas 256 over a communication link (not shown) , sometimes referred to as front haul, such as the Common Public Radio Interface (CPRI) . Therefore, in some implementations, the term apparatus 320 may also refer to network-side nodes that perform processing operations such as, but not limited to, determining the location of the apparatus 310, resource allocation (scheduling) , message generation, and encoding / decoding, and that which are not necessarily part of the equipment that houses the antennas 256 of the apparatus 320. The nodes may also be coupled to other apparatuses 320. In some implementations, the apparatus 320 may actually be a plurality of nodes that are operating together to serve the apparatus 310, such as through the use of coordinated multipoint transmissions, or through the use of ORAN system as described above in the disclosure.
[0081] The processor 260 is configured to perform operations including those related to: preparing a transmission for DL transmission to the apparatus 310, processing an UL transmission received from the apparatus 310, preparing a transmission for backhaul transmission to another apparatus 320, and processing a transmission received over backhaul from another apparatus 320. Processing operations related to preparing a transmission for DL or backhaul transmission may include operations such as, but not limited to, encoding, modulating, precoding (such as MIMO precoding) , transmit beamforming, and generating symbols for transmission. Processing operations related to processing received transmissions in the UL or over backhaul may include operations such as, but not limited to, receive beamforming, demodulating received symbols, and decoding received symbols. The processor 260 may also be configured to perform operations relating to network access (such as initial access) and / or DL synchronization, such as generating the content of synchronization signal blocks (SSBs) , generating the system information, and the like. In some implementations, the processor 260 is further configured to generate an indication of beam direction, such as BAI, which may be scheduled for transmission by the scheduler 253 which will be described below. In some implementations, the processor 260 implements the transmit beamforming and / or receive beamforming based on beam direction information (such as BAI) received from another apparatus 320. The processor 260 is configured to perform other network side processing operations described herein, such as, but not limited to, determining the location of the apparatus 310, determining where to deploy another apparatus 320, and the like. In some implementations, the processor 260 may generate signaling data, to configure one or more parameters of the apparatus 310 and / or one or more parameters of another apparatus 320. Any signaling data generated by the processor 260 is sent by the transmitter 252. In some implementations, the apparatus 320 implements physical layer processing. In some implementations, the apparatus 320 may perform higher layer functions such as those at the Medium Access Control (MAC) or Radio Link Control (RLC) layers in addition to physical layer processing. In the apparatus 320, the scheduler 253 may be coupled to the processor 260 or integrated within the processor 260. In some implementations, the scheduler 253 may be integrated within the apparatus 320 or may be operated separately from the apparatus 320. The scheduler 253 may schedule UL, DL, SL, and / or backhaul transmissions, including issuing scheduling grants and / or configuring scheduling-free (such as “configured grant” ) resources.
[0082] The apparatus 320 may further include a memory 258 that is configured to store instructions for performing the operations described herein. The memory 258 may also store data that is used, generated, or collected by the apparatus 320. For example, the memory 258 can store software instructions or modules configured to implement some or all of the functionalities and / or implementations described herein and that which are executed by the processor 260.
[0083] Although not illustrated, the processor 260 may be implemented as part of the transmitter 252 and / or a part of the receiver 254. Although not illustrated, in some implementations, the processor 260 may implement the scheduler 253 and the memory 258 may be implemented as part of the processor 260.
[0084] The processor 260, the scheduler 253, the processing components of the transmitter 252, and the processing components of the receiver 254 may each be implemented by the same or different processors that are configured to execute instructions stored in a memory, such as in the memory 258.
[0085] The apparatus 320 and / or the apparatus 310 may include other components, not shown or described herein for the sake of clarity.
[0086] Note that the term “signaling” , as used herein, may alternatively be referred to as control signaling, control message, control information, or message for simplicity. Signaling between a base station (such as the TRP 170a. 170b, 172) and a UE or sensing device (such as ED 110) , or signaling between a different UE or sensing device (such as between ED 110a and ED 110b) may be carried in physical layer signaling (also called as dynamic signaling) , which is transmitted in a physical layer control channel. For DL, the physical layer signaling may be known as downlink control information (DCI) which is transmitted in a physical downlink control channel (PDCCH) . For UL, the physical layer signaling may be known as uplink control information (UCI) which is transmitted in a physical uplink control channel (PUCCH) . For SL, signaling between different UEs or sensing devices (such as between ED 110a and ED 110b) may be known as SL control information (SCI) which is transmitted in a physical sidelink control channel (PSCCH) . Signaling may be carried in a higher layer (such as higher than physical layer) signaling, which is transmitted in a physical layer data channel, such as in a physical downlink shared channel (PDSCH) for downlink signaling, in a physical uplink shared channel (PUSCH) for uplink signaling, and in a physical sidelink shared channel (PSSCH) for SL signaling. Higher layer signaling may also be called static signaling, or semi-static signaling. The higher layer signaling may include radio resource control (RRC) protocol signaling or media access control -control element (MAC-CE) signaling. Signaling may be included in a combination of physical layer signaling and higher layer signaling. In the present disclosure, the terms “MAC-CE” and “MAC CE” may be used interchangeably.
[0087] It should be noted that in the present disclosure, “information” , when different from “message” , may be carried within a single message, or may be carried in multiple separate messages.
[0088] FIG. 4 illustrates an example apparatus 410 according to an implementation of the present disclosure. The apparatus 410 may be a communication device or an apparatus implemented in a communication device such as the ED 110 or the TRPs 170a, 170b, 172. For example, the apparatus 410 implemented in an ED may be an integrated circuit, which in some instances may be referred to as a chip, a modem, a modem chip, a baseband chip, or a baseband processor. In some implementations, one or more integrated circuits can be packaged into a system-on-chip, a system-in-package, or a multi-chip module. The apparatus 410 can include one or more integrated circuits and other discrete components. In some implementations, the apparatus 410 may be a module within the ED 110, or within the apparatus 310. In some implementations, the apparatus 410 may be a module within one of the TRPs 170a, 170b, 172, or the apparatus 320.
[0089] In an example, the apparatus 410 may include one or more processors 411, and an interface circuit 412. The apparatus 410 may further include a memory 413. The one or more processors 411 are configured to process signals and execute one or more communication protocols. The memory 413 is configured to store at least a part of corresponding computer program instructions and / or data. In an example, the one or more processors 411 execute the computer program instructions stored in the memory 413 to implement related operations (for example, inputting, outputting, receiving, and transmitting) in the method embodiments disclosed herein. In some implementations, the memory 413 being configured to store the corresponding computer program instructions and / or data may mean that the memory 413 is configured to store all of the corresponding computer program instructions and / or data for execution by the one or more processors 411. In some implementations, the memory 413 being configured to store the corresponding computer program instructions and / or data may mean that the memory 413 is configured to store a part of the corresponding computer program instructions and / or data. For example, the part of the corresponding computer program instructions and / or data may include computer program instructions and / or data that need to be currently executed by the one or more processors 411. Thus, the memory 413 may store different parts of computer program instructions and / or data for a plurality times for the one or more processors 411 to perform related operations in the method embodiments disclosed herein. As a communication interface, the interface circuit 412 is configured to implement communication with another component. For example, the interface circuit 412 may communicate a signal with other apparatus / system such as a radio frequency processing apparatus, or processor system. The communication includes transmitting signal (or data, information) to another component or device, or receives signal from another component or device. “transmitting” includes outputting the signal to a component or device that is directly or indirectly coupled to the interface circuit (transmitting unit) . “receiving” includes inputting or obtaining a signal from a component or device that is directly or indirectly couped to the interface circuit (receiving unit) . Optionally, to reduce a load of the one or more processors, a baseband signal processing circuit 414 may be also disposed to implement processing of at least a part of baseband signals, including signal demodulation, modulation, encoding, decoding, or the like.
[0090] The apparatus 410 may be the processor 210 (or 260) within the apparatus 310 (or 320) , in some scenarios, or may be included within the processor 210 (or 260) within the apparatus 310 (or 320) in some scenarios. The apparatus 410 may be a baseband chip or may include a baseband chip. In some implementations, the apparatus 410 may be independently packaged into a chip. In some implementations, the apparatus 310 (or 320) includes different types of chips. The apparatus 410 may be packaged into a processor chip (for example, an SoC chip or an SIP chip) with the different types of chips. In some implementations, the apparatus 410 may be packaged into a chip with some or all of circuits of a radio frequency processing system that may further be included in the apparatus 310 (or 320) .
[0091] FIG. 5 illustrates example apparatus 510 according to an implementation of the present disclosure. The apparatus 510 may include corresponding modules or units configured to implement methods and / or implementations described herein. In some implementations, the apparatus 510 includes a processing unit 512 and a communication unit 513. Optionally, the apparatus 510 may further include a storage unit 511 configured to store apparatus program code (or instructions) and / or data.
[0092] The apparatus 510 may be an ED side apparatus, for example, an ED or a module in an ED, or a circuit or a chip responsible for a communication function in an ED. In some implementations, apparatus 510 may be the apparatus 310. The processing unit 512 may be the processor 210. The communication unit 513 may include a receiving unit and / or a transmitting unit. The receiving unit and / or the transmitting unit may be the transmitter 201 and / or the receiver 203 respectively. The storage unit 511 may be the memory 208.
[0093] The apparatus 510 may be a base station side apparatus, for example, a base station or a module in a base station, or a circuit or a chip responsible for a communication function in a base station. In some implementations, apparatus 510 may be apparatus 320. The processing unit 512 may be the processor 260 (the scheduler 253 may also be included) . The communication unit 513 may include a receiving unit and / or a transmitting unit. The receiving unit and / or the transmitting unit may be the transmitter 252 and / or the receiver 254 respectively. The storage unit 511 may be the memory 258.
[0094] In some implementations, when the apparatus 510 is an ED 110 or a module in an ED 110, a function of the apparatus 510 may be implemented by one or more processors. Specifically, the processor may include a modem chip, or a system on chip (SoC) chip or an SIP chip that includes a modem core. A function of the communication unit 513 may be implemented by a transceiver circuit.
[0095] In some implementations, when the apparatus 510 is a circuit or a chip that is responsible for a communication function in an ED 110, such as a modem chip, a system on chip (SoC) chip or an SIP chip that includes a modem core -a function of the processing unit 512 may be implemented by a circuit system within the chip which includes one or more processors. A function of the communication unit 513 may be implemented by an interface circuit or a data transceiver circuit on the chip.
[0096] It may be understood that the units in the apparatus 510 may be logical or functional. Each function may correspond to one functional unit, or two or more functions may be integrated into a single functional unit. In actual implementation, all or some of the units may be integrated into a single physical entity, or may be distributed across different physical entities. In addition, the functional units may be implemented in the form of hardware, software, or a combination of hardware and software. Whether a function is implemented in the form of hardware or software depends on particular applications and design constraint conditions of the technical solutions. A person skilled in the art may use different methods to implement the described functions for specific applications, but it should not be considered that the implementation goes beyond the scope of this disclosure.
[0097] In an example, a functional unit in any one of the apparatuses may be configured as one or more integrated circuits for implementing the methods disclosed herein, for example, as one or more application-specific integrated circuits (application-specific integrated circuits, ASICs) , one or more central processing units (CPUs) , one or more microprocessors or microprocessor units (MPUs) , one or more microcontrollers or microcontroller units (MCUs) , one or more digital signal processors (DSPs) , one or more field programmable gate arrays (FPGAs) , or a combination of these.
[0098] In an example, the storage unit 511 may include a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory, and / or a register.
[0099] A processor may be referred to as a processor system, an application processor, a baseband processor, a processor circuit, or a processor core. The processor may include one or a combination of one or more central processing units (CPUs) , one or more digital signal processors (DSPs) , one or more microprocessors (microprocessor units, MPUs) , one or more microcontrollers (microcontroller units, MCUs) , one or more graphics processing units (GPUs) , one or more field programmable gate arrays (FPGAs) , one or more artificial intelligence processors (AI processors) , or one or more neural network processing units (NPUs) .
[0100] Memory or a storage unit may include one or more of the following storage media: a random access memory (RAM) , a static random access memory (static RAM, SRAM) , a dynamic random access memory (dynamic RAM, DRAM) , a phase-change memory (PCM) , a resistive random access memory (resistive RAM, ReRAM) , a magnetoresistive random access memory (magnetoresistive RAM, MRAM) , a ferroelectric random access memory (ferroelectric RAM, FRAM) , a cache, a register, a read-only memory (ROM) , a flash memory (flash memory) , an erasable programmable read-only memory (erasable programmable ROM, EPROM) , a hard disk, and the like. In an example, computer program instructions used to execute embodiments may be stored in a non-volatile memory, for example, at least a part of a memory or storage unit (for example, one or more of a ROM, a flash memory, an EPROM, or a hard disk) . When a terminal runs, a part or all of corresponding computer program instructions may be loaded to a memory that has a higher transmission speed with the processor, for example, at least a part of a memory or a storage unit (for example, one or more of a RAM, an SRAM, a DRAM, a PCM, a RERAM, an MRAM, a FRAM, a cache, or a register) , so that the processor executes the computer program instructions to perform the steps in the method embodiments disclosed herein.
[0101] A terrestrial communication system may also be referred to as a land-based or ground-based communication system, although a terrestrial communication system can also, or instead, be implemented on or in water. A wireless communications system may support communications between a UE and non-terrestrial devices, which is also called as a non-terrestrial communication system. The non-terrestrial communication system may bridge the coverage gaps for underserved areas by extending the coverage of cellular networks through non-terrestrial nodes, which will be key to ensuring global seamless coverage and providing mobile broadband services to unserved / underserved regions. In this case, it is hardly possible to implement terrestrial access-points / base-stations infrastructure in the areas like oceans, mountains, forests, or other remote areas.
[0102] The terrestrial communication system may be a wireless communications using 5G technology and / or later generation wireless technology (e.g., 6G or later) . In some examples, the terrestrial communication system may also accommodate some legacy wireless technology (e.g., 3G or 4G wireless technology) . The non-terrestrial communication system may be a communications using the satellite constellations like conventional Geo-Stationary Orbit (GEO) satellites which utilizing broadcast public / popular contents to a local server, Low earth orbit (LEO) satellites establishing a better balance between large coverage area and propagation path-loss / delay, stabilize satellites in very low earth orbits (VLEO) enabling technologies substantially reducing the costs for launching satellites to lower orbits, high altitude platforms (HAPs) providing a low path-loss air interface for the users with limited power budget, or Unmanned Aerial Vehicles (UAVs) (or unmanned aerial system (UAS) ) achieving a dense deployment since their coverage can be limited to a local area, such as airborne, balloon, quadcopter, drones, etc. In some examples, GEO satellites, LEO satellites, UAVs, HAPs and VLEOs may be horizontal and two-dimensional. In some examples, UAVs, HAPs and VLEOs coupled to integrate satellite communications to cellular networks emerging 3D vertical networks consist of many moving (other than geostationary satellites) and high altitude access points such as UAVs, HAPs and VLEOs.
[0103] FIG. 6 illustrates a schematic illustration of an example non-terrestrial communication system 600 providing non-terrestrial NR access to a UE. As illustrated in FIG. 6, a non-terrestrial network (NTN) can provide non-terrestrial NR access to the UE 610 by means of an NTN payload 620 and an NTN Gateway 630. The NTN payload 620 can be, for example, a satellite node with transparent payload. The NTN Gateway 630 can be, for example, a ground station. FIG. 6 depicts a service link between the NTN payload 620 and the UE 610, and a feeder link between the NTN Gateway 630 and the NTN payload 620.
[0104] In some cases, the NTN payload 620 is a transparent NTN-payload. In some cases, a transparent NTN-payload transparently forwards the radio protocol received from the UE 610 (via the service link) to the NTN Gateway 630 (via the feeder link) and vice-versa. The NTN payload 620 is such that the NTN gateway 630 may serve multiple NTN payloads. A transparent NTN-payload may change the carrier frequency, before re-transmitting it on the service link, and vice versa (respectively on the feeder link) .
[0105] In some examples, for an NTN cell, the following applies in addition to network identities:
[0106] -A tracking area corresponds to a fixed geographical area. Any respective mapping is configured in the RAN; and
[0107] -A mapped cell ID.
[0108] In some cases, three types of service links are supported:
[0109] 1. Earth-fixed: provisioned by beam (s) continuously covering the same geographical areas all the time (e.g., the case of geostationary orbit (GSO) satellites) ;
[0110] 2. Quasi-Earth-fixed: provisioned by beam (s) covering one geographic area for a limited period and a different geographic area during another period (e.g., the case of non-geostationary orbit (NGSO) satellites generating steerable beams) ;
[0111] 3. Earth-moving: provisioned by beam (s) whose coverage area slides over the Earth surface (e.g., the case of NGSO satellites generating fixed or non-steerable beams) .
[0112] With NGSO satellites, the gNB can provide either quasi-Earth-fixed service link or Earth-moving service link, while gNB operating with GSO satellite can provide Earth fixed service link.
[0113] As described in the specifications of some systems, downlink and uplink transmissions are organized into frames with Tf= (ΔfmaxNf / 100) ·Tc=10 ms duration, each consisting of ten subframes of Tsf= (ΔfmaxNf / 1000) ·Tc=1 ms duration. The number of consecutive OFDM symbols per subframe is Each frame is divided into two equally-sized half-frames of five subframes each. There is one set of frames in the uplink and one set of frames in the downlink on a carrier.
[0114] FIG. 7 illustrates an example timing between DL and UL at the UE. In some cases, the example timing is described in the specifications of some systems. As shown in FIG. 7, UL frame number i for transmission from the UE shall start before the start of the corresponding DL frame at the UE where NTA is indicated to the UE via a timing advance command DL MAC CE, but for msgA transmission on PUSCH NTA=0.
[0115] NTA, offset can be provided as a timing advance offset for a serving cell by n-TimingAdvanceOffset for the serving cell. In some cases, if the UE is not provided n-TimingAdvanceOffset for a serving cell, the UE determines a default value NTA, offset of the timing advance offset. The uplink time synchronization reference point (e.g., the RP 640 shown in FIG. 6) is the point where DL and UL are frame aligned with the offset given by NTA, offset. If the UE has been configured with multiple cells in a Timing Advance Group of cells (TAG) , the value NTA, offset is expected to be same for all the serving cells in the TAG. The UL timing for PUSCH / SRS / PUCCH transmissions is the same for all the serving cells in the TAG.
[0116] Since TA is small in TN slot index and symbol index in DL and UL are usually aligned at both gNB and UE sides. Moreover, because UE adjusts TA according to gNB’s indication (NTA, NTA, offset) , gNB and UE have a same understanding on the DL and UL overlapping symbols and back-to-back non-overlapping symbols without sufficient gap, for which collision handling and UL / DL transmission / reception prioritization rules have been specified for the operation of HD-FDD UE (e.g., HD-FDD RedCap UE) in a TN. The resource overhead of conservative scheduling of UL / DL transmission / reception by gNB due to potential TA misalignment in TN is thus marginal in TN.
[0117] In NTN, as shown in FIG. 6, for the UE 610 to pre-compensate the two-way transmission delay between the uplink time synchronization reference point and the serving satellite, the UE 610 determines based on one-way propagation delay Delaycommon (t) that the UE 610 determines as:
[0118] where TACommon, TACommonDrift, and TACommonDriftVariant are respectively provided by ta-Common, ta-CommonDrift, and ta-CommonDriftVariant and tepoch is provided by epochTime which is the epoch time of ta-Common, ta-CommonDrift, and ta-CommonDriftVariant. While TACommon is a configured timing offset that is equal to the round-trip time (RTT) between the RP and the NTN payload, Koffset is a configured scheduling offset used to allow the UE 610 sufficient processing time between a downlink reception and an uplink transmission, and hence should be larger or equal to the sum of the service link RTT and the Common TA.
[0119] The offset kmac is another configurable offset that is approximately equal to the RTT between the RP (e.g., the RP 640 of FIG. 6) and the gNB (e.g., the NTN Gateway 630 of FIG. 6) and would be used to delay the application of a downlink configuration indicated by a MAC CE command on PDSCH, and in estimation of UE-gNB RTT. It may be provided by the network when downlink and uplink frame timing are not aligned at gNB. The kmac is also used in the random access procedure, to determine the start time of random access response (RAR) window / MsgB window after a Msg1 / MsgA transmission. Delaycommon (t) provides a distance at time t between the serving satellite and the uplink time synchronization reference point divided by the speed of light.
[0120] More importantly, in NTN, using higher-layer ephemeris parameters for a serving satellite, if provided, a UE pre-compensates the two-way transmission delay on the service link based on that the UE determines using the serving satellite position and its own position, e.g., obtained through GNSS. In contrast to TN, there might be a significant misalignment between gNB and UE on the determination of DL and UL overlapping and back-to-back non-overlapping symbols without sufficient gap cases. Although UE can report TTA to gNB, including the component the UE has estimated, misalignment between gNB and UE can be caused by the report granularity of the Timing Advance Report MAC CE and the infrequent reporting instances.
[0121] As specified in the specifications of some systems, the Timing Advance reporting procedure is used in an NTN or an air to ground network (ATG) to provide the gNB with an estimate of the UE’s Timing Advance value (i.e., TTA as defined in the UE’s TA in the specifications of some systems) . The RRC thus controls Timing Advance reporting by configuring the following parameters provided in TAR-Config information element (IE) :
[0122] - offsetThresholdTA;
[0123] - timingAdvanceSR.
[0124] In some cases, a Timing Advance report (TAR) shall be triggered if any of the following events occur:
[0125] - upon indication from upper layers to trigger a Timing Advance report;
[0126] - upon configuration of offsetThresholdTA by upper layers, if the UE has not previously reported Timing Advance value to current serving cell;
[0127] - if the variation between the current estimate of the Timing Advance value and the last reported Timing Advance value is equal to or larger than offsetThresholdTA, if configured.
[0128] In some examples, for triggering the TAR, the MAC entity shall:
[0129] 1> if the Timing Advance reporting procedure determines that at least one TAR has been triggered and not cancelled:
[0130] 2> if UL-SCH resources are available for a new transmission and the UL-SCH resources can accommodate the Timing Advance Report MAC CE plus its subheader as a result of logical channel prioritization:
[0131] 3> instruct the Multiplexing and Assembly procedure to generate the Timing Advance Report MAC CE as defined in clause 6.1.3.56.
[0132] 2> else
[0133] 3> if timingAdvanceSR is configured with value enabled:
[0134] 4> trigger a Scheduling Request.
[0135] However, in some cases, the misalignment between the TA last known to gNB and the actual TA used by UE can be as large as 16ms when UE is configured with conditional TA reporting by offsetThresholdTA of 15ms plus the 1ms report granularity of the Timing Advance Report MAC CE as defined in the specifications of some systems. Even when the UE is configured with the least offsetThresholdTA value of 0.5ms, the misalignment between the TA last known to gNB and the actual TA used by UE would be up to 1.5ms which spans 3 slots at 30kHz SCS. If a collision happens at the UE side, it may not be aligned with what is assumed at gNB.
[0136] It is noted that even if the UE is not configured for TA reporting or has not indicated the capability of TA reporting to gNB, the misalignment between the TA assumed by the gNB and the actual TA used by UE would be up to the difference between the maximum TA possible, and the minimum TA possible in the NTN cell footprint, for example, at the Satellite Nadir, if applicable. In such case, the UE may derive the TA value assumed by, or last known to, gNB from the latest Koffset parameter provided to the HD-FDD UE (denoted for brevity as HD-UE) for scheduling purposes as the cell specific offset or after adjusting it by the UE-specific Koffset, if provided. In the present disclosure, the terms “HD-FDD” and “FDD-HD” may be used interchangeably.
[0137] The technologies described herein may also be applicable to a system including both terrestrial TRPs such as base-stations and non-terrestrial TRPs such as drones, balloons, high-altitude platform stations (HAPS) , satellites, or any such devices that support radio access technologies such as 5G NR or future 6G systems.
[0138] FIG. 8 illustrates a schematic illustration of an example communication system 800 including both terrestrial TRPs and non-terrestrial TRPs. As illustrated in FIG. 8, terrestrial TRPs are communicating with non-terrestrial TRPs that are part of a satellite constellation. A satellite constellation includes a plurality of satellite orbits such that earth is always provided with wireless coverage from the satellites, and each satellite orbit may have a plurality of satellites in it. T-TRPs may be connected to the core network through terrestrial gateways while satellite constellations may be connected to the core network through dedicated non-terrestrial gateways. Devices such as UEs may connect and communicate with a T-TRP and / or with a NT-TRP, depending on the conditions of traffic load, radio link quality, congestion, and so on.
[0139] FIG. 9 illustrates a schematic illustration of another example communication system 900 including both terrestrial TRPs and non-terrestrial TRPs. As illustrated in FIG. 9, another possible scenario may be envisioned where the satellite constellation effectively acts as the gateway for T-TRPs on the ground. Satellites in the satellite constellation communicate with the core network through gateways located on the ground using a wireless link, while the gateways on the ground may use a wired link (e.g., fiber optical link) to communicate with the core network. T-TRPs communicate with satellites using wireless links and satellites communicate between each other using free space optical links (e.g., lasers) . Devices such as UEs may connect and communicate with a T-TRP or with a NT-TRP, depending on the conditions of traffic load, radio link quality, congestion, and so on.
[0140] FIG. 10 illustrates a schematic illustration of yet another example non-terrestrial communication system 1000 including both terrestrial TRPs and non-terrestrial TRPs. As illustrated in FIG. 10, another possible scenario may be envisioned where the NT-TRPs communicate with T-TRPs through the core network. NT-TRPs may first communicate with dedicated non-terrestrial gateways, which then communicate with the core network. The core network may then relay information from NT-TRPs to T-TRPs via dedicated terrestrial gateways. Devices such as UEs may connect and communicate with a T-TRP or with a NT-TRP, depending on the conditions of traffic load, radio link quality, congestion, and so on.
[0141] In the scenarios above, the link between the UE and the NT-TRP may be called service link, and the link between the NT-TRP and the NTN gateway may be called feeder link. In addition, the link between the NT-TRPs may be called as inter-satellite link (ISL) (not shown in the figure) . Each NT-TRP may be associated with one or more NTN Gateways.
[0142] In some cases, there is a bi-directional wireless link between terrestrial TRPs and non-terrestrial TRPs, allowing such TRPs to communicate with each other. The link from the non-terrestrial TRP to the terrestrial TRP is referred to as the downward link. The link from the terrestrial TRP to the non-terrestrial TRP is referred to as the upward link.
[0143] A UE supporting NTN in some examples of the present disclosure may be assumed to be global navigation satellite systems (GNSS) -capable. That is, the UE has the capability to determine its location through a GNSS independently from the NTN providing the communication service. In particular, the UE determines its location with respect to the location of the serving satellite node which the UE can determine from the satellite ephemeris indicated in the serving cell’s system information. However, in some other aspects of these embodiments, the UE may not be GNSS-capable but it may be rather capable of determining its location using a positioning technique based on downlink positioning reference signals (DL-PRSs) from multiple TRPs. The multiple TRPs may be all NTN TRPs which may or may not include the serving satellite, all TN TRPs, or a combination of NTN and TN TRPs.
[0144] It should be understood that some examples described in the present disclosure can be applied to other radio access technologies such as wireless fidelity (Wi-Fi) . Some embodiments described in the present disclosure can be applied to other UE resources, such as the UE’s battery, the UE’s radio frequency (RF) chains, the UE’s physical antenna elements, the UE’s antenna ports, the UE’s baseband processing unit, the UE’s PDCCH processing unit, the UE’s PDSCH processing unit, the UE’s PUCCH processing unit, the UE’s PUSCH processing unit, etc.
[0145] Some implementations described in the present disclosure can be applied to integration of TN-NTN where terrestrial TRPs are communicating with non-terrestrial TRPs that are part of a satellite constellation. A satellite constellation is typically constituted of a plurality of satellite orbits such that Earth is always provided with wireless coverage from the satellites, and each satellite orbits may have a plurality of satellites in it. Terrestrial TRPs may be connected to the core network through gateways while satellite constellations may be connected to the core network through dedicated satellite gateways.
[0146] In some cases, a reduced capability (RedCap) UE can report the capability of type-A HD-FDD. In some cases, for the type-A HD-FDD operation, a guard period is created by the UE by not receiving the last part of a downlink subframe immediately preceding an uplink subframe from the same UE. In some examples, a HD-UE is not capable of full-duplex communication on a serving cell with paired spectrum. That is, the UE does not support simultaneous transmission and reception on the serving cell. In addition, it is not expected for a HD-UE to transmit in the uplink earlier than NRx-TxTc after the end of the last received downlink symbol. Similarly, a HD-UE is not expected to receive in the downlink earlier than NTx-RxTc after the end of the last transmitted uplink symbol. Where NTx-Rx and NRx-Tx are given by the specifications of some systems as follows:
[0147] Table 1. Example NTx-Rx and NRx-Tx
[0148] In some cases, a collision can occur between UL transmission and DL reception. In some examples, a collision between DL and UL occurs when (i) the DL and UL have overlapping symbols or (ii) the DL and UL have back-to-back non-overlapping symbols without a sufficient transition gap. The following example DL and UL collision cases along with the respective handling rules are identified assuming a TN.
[0149] Case 1: Dynamically scheduled DL reception collides with semi-statically configured UL transmission. For examples, transmission of SRS, PUCCH, or PUSCH configured by higher layers may collide with reception of CSI-RS or PDSCH indicated by a DCI format. Collision handling rules may include:
[0150] (i) no cancellation of PUCCH or PUSCH if the first symbol in the set occurs within Tproc, 2 relative to a last symbol of a PDCCH reception carrying the DCI format. Otherwise, cancel PUCCH or PUSCH; and
[0151] (ii) no cancellation of SRS that occur in symbols within Tproc, 2 relative to a last symbol of a PDCCH reception carrying the DCI format. Cancel the remaining symbols of SRS.
[0152] Case 2: Semi-statically configured DL reception collides with dynamically scheduled UL transmission. For example, a reception of PDCCH, semi-persistent scheduling (SPS) PDSCH, CSI-RS, or DL PRS configured by higher layers may collide with a transmission of PUSCH, PUCCH, PRACH, or SRS indicated by a DCI format. The collision handling rule may include: the reception of PDCCH, SPS PDSCH, CSI-RS, or DL PRS configured by higher layers is cancelled.
[0153] Case 3: Semi-statically configured DL reception collides with semi-statically configured UL transmission. The Case 3 collision can occur, if a HD-UE would transmit a PUSCH, or PUCCH, or SRS in a first set of symbols in an NTN cell based on a configuration by higher layers, and accounting for total TA value, and the HD-UE has received dedicated higher layer parameters configuring reception in a second set of symbols, or has received Type-0 / 0A / 1 / 2-PDCCH CSS set configuration for PDCCH reception in the second set of symbols. Collision handling rule may include: UE monitors paging during paging occasion (type 2 CSS) and cancels configured grant (CG) -PUSCH transmission in RRC_INACTIVE state when a paging occasion overlaps with a CG-small data transmission (SDT) transmission. Otherwise, if the DL reception colliding with semi-statically configured UL transmission is not the paging, it is considered as an error case in a TN.
[0154] Case 4: Dynamically scheduled DL reception collides with dynamic scheduled UL transmission. For example, UE detects a DCI format scheduling a reception in a set of symbols and a DCI format scheduling a transmission in any symbol from the set of symbols. Collision handling rule may include that it is considered as an error case in the TN.
[0155] Case 5: Configured SSB collides with dynamically scheduled or configured UL transmission. For example, a transmission of PRACH triggered by a PDCCH order, or PUSCH, or PUCCH, or SRS collides with symbols of SS / PBCH blocks within the active DL BWP as indicated by ssb-PositionsInBurst in SIB1 or in ServingCellConfigCommon or by NonCellDefiningSSB. Collision handling rule may include: UE does not transmit PRACH, PUSCH, PUCCH if any symbol overlaps with the SSB symbols, and UE does not transmit SRS on the symbols overlapping with SSB symbols.
[0156] Case 6: Dynamic or semi-static DL collides with valid RACH Occasion (RO) . For example, a transmission of a PRACH or MsgA PUSCH triggered by higher layers in a set of symbols collides with reception of a PDCCH, or a PDSCH, or a CSI-RS, or a DL PRS, or symbols of SS / PBCH blocks within the active DL BWP as indicated by ssb-PositionsInBurst in SIB1 or in ServingCellConfigCommon or by NonCellDefiningSSB. Collision handling rule may include: whether the UE cancels the reception of the dynamic / semi-static DL or cancels the valid RO is left to UE implementation. In the present application, MsgA PUSCH may not be the same as PUSCH.
[0157] Case 7: Collision due to link direction switching. Example 1: A HD-UE would transmit a PUSCH, or PUCCH, or SRS based on a configuration by higher layers and the HD-UE is indicated presence of SS / PBCH blocks within the active DL BWP as indicated by ssb-PositionsInBurst in SIB1 or in ServingCellConfigCommon or by NonCellDefiningSSB Collision handling rule for example 1 may include:
[0158] (i) UE cancels PUSCH or PUCCH if a last symbol would not be at least NTx-Rx·Tc prior to a first symbol of the next earliest SS / PBCH block;
[0159] (ii) UE cancels PUSCH or PUCCH if a first symbol would not be at least NRx-Tx·Tc after a last symbol of the previous SS / PBCH block;
[0160] (iii) UE does not transmit SRS in symbols that would not be at least NTx-Rx·Tc prior to a first symbol of the next earliest SS / PBCH block; and
[0161] (iv) UE does not transmit SRS in symbols that would not be at least NRx-Tx·Tc after a last symbol of the previous latest SS / PBCH block.
[0162] Example 2 for Case 7 collision: The transmission of PRACH or MsgA PUSCH starting or ending at a symbol that is earlier or later than NRx-Tx·Tc or NTx-Rx·Tc, respectively, from the last or first symbol of the reception of a PDCCH, or a PDSCH, or a CSI-RS, or a DL PRS configured by higher layers or SS / PBCH blocks indicated by ssb-PositionsInBurst in system information block type 1 (SIB1) or in ServingCellConfigCommon or by NonCellDefiningSSB. Collision handling rule for example 2 may include: whether the UE cancels the reception of the DL transmission or cancels the transmission of PRACH / MsgA PUSCH is left to UE implementation.
[0163] FIG. 11 illustrates example actual collisions at the UE and example perceived virtual collisions at a terrestrial TRP (for example, gNB) . As shown in FIG. 11, if gNB schedules or configures resources for DL and UL transmissions based on the latest TA reported by the UE or a TA assumed by gNB, e.g., maximum TA possible within the cell / beam coverage area, any of the collision cases discussed earlier for the TN scenario may occur at the UE side without the gNB being aware of such collision. This includes even collision Case 3 and Case 4, which are supposed to be completely avoided by proper gNB resource scheduling / configuration, which is the reason why a UE in the TN scenario would not expect a Case 3 or Case 4 collision to occur and considers such cases as error cases. Given the potential TA mismatch between the gNB and the UE, proper resource scheduling / configuration from gNB’s perspective cannot ensure that collision Cases 3 and 4 would not occur at the UE side. As such, collision Cases 3 and 4 are possible actual collision cases from the perspective of an FDD-UE operating in an NTN cell.
[0164] As shown in FIG. 11, according to the timing at reference point, gNB schedules / configures a first DL transmission in Slot / Subframe 2 (DL2) and a second DL transmission in Slot / Subframe 4 (DL4) as well as a first UL transmission in Slot / Subframe 8 (UL8) and a second UL transmission in Slot / Subframe 0 in the subsequent radio frame (UL0) for an FDD-HD UE. Please note that in the figures, one box (for example, DL2, DL4, and UL8) may also represent a group of symbols within a slot or subframe, or, represent a group of slots or subframes. Correspondingly, the box for UL0 may represent a group of symbols within a slot or subframe in another radio frame, or represent a group of slots or subframes in another radio frame.
[0165] As shown in FIG. 11, according to the UE timing for uplink assumed by the gNB, although there is no overlap in the time domain between any of these DL transmissions and any of these UL transmissions at the reference point, the gNB, accounting for the latest TA reported or assumed for that UE, perceives that a collision would occur between the reception of DL4 and the transmission of UL8. Such perceived collision may be called a “virtual collision” since the gNB is unaware whether or not that collision would actually occur at the UE side. Furthermore, the gNB may not be aware of any collision with the reception of DL2 or the transmission of UL0. Accordingly, the gNB may expect that the UE would apply the appropriate collision handling rule for the collision case between DL4 and UL8 (i.e., Case 1 / 2 / 5 / 6 / 7 mentioned above) . Also, the gNB may not expect that the UE would apply any collision handling rules to the reception of DL2 or the transmission of UL0.
[0166] However, as can be seen from FIG. 11, according to the actual timing at the UE side based on the actually used TA value, the UE does not experience a collision between the reception of DL4 and the transmission of UL8. The UE rather experiences a first actual collision between the reception of DL2 and the transmission of UL8 and a second actual collision between the reception of DL4 and the transmission of UL0. Accordingly, the UE would need to apply the appropriate collision handling rule to each of the first and the second actual collision cases which may be different from the collision case perceived at gNB and the respective handling rule.
[0167] In the present disclosure, a collision between the uplink transmission and the downlink reception according to the UE timing assumed by the gNB may be referred to as a “virtual collision” which is mentioned above. In some cases, the virtual collision can be referred to as a collision according to the “first procedure” . As noted, the UE timing assumed by gNB may be based on the latest TA reported by the UE to the gNB or the TA assumed by the gNB for the UE. In some cases, the latest TA reported by the UE to the gNB may also be referred to as the “last reported TA value, ” and the TA assumed by the gNB for the UE may also be referred to as the “obtained TA value. ” A collision between the uplink transmission and the downlink reception according to the actual timing at the UE side can also be referred to as an “actual collision” which is mentioned above. In some cases, the actual collision may also be referred to as a collision according to the “second procedure” .
[0168] In some cases, the potential TA mismatch between the UE and the gNB may result in adverse impacts on resource utilization and availability under conservative scheduling of UL / DL transmission / reception by gNB in attempt to avoid collisions at the UE side. FIG. 12 illustrates an example of resource waste and lack of scheduling flexibility when gNB attempts to avoid DL- UL collisions at the UE side due to TA mismatch between UE and gNB. As shown in FIG. 12, UL8 collides with DL4 from gNB perspective according to the latest TA report, while UL8 actually collides with DL2 at UE side due to the TA mismatch. As such, a large amount of resources would be reserved from gNB perspective if gNB proactively avoids a potential collision according to the maximum TA misalignment determined from the TA report configuration.
[0169] As illustrated in FIG. 12, assuming the potential TA mismatch between gNB and UE is from -2ms to +2ms, gNB would refrain from scheduling downlink reception to the UE in the collision ambiguity period corresponding to DL4, i.e. from DL2 to DL6 (shaded blocks in FIG. 12) if a UL transmission in UL8 is scheduled. This in fact implies that gNB would need to consider TA mismatches with different UEs simultaneously which would eventually lead to a decreased overall resource utilization and lack of flexibility in scheduling and configuring resources.
[0170] The analysis above of potential resource utilization reduction is applicable to all collision Cases 1-7 if gNB attempts to avoid the collision for these cases at the UE side. Generally, the priority rules to cancel UL transmission or DL reception at UE side, when there are DL and UL overlapping symbols (at least for Case 1 / 2 / 5 / 6) and back-to-back non-overlapping symbols without sufficient gap (for Case 7) , can be applied in NTN directly from UE perspective by taking the effect of the actual timing advance into account when determining the DL reception symbols and UL transmission symbols. For example, semi-statically configured DL reception / UL transmission has lower priority than dynamically scheduled UL transmission / DL reception except for SSB reception.
[0171] Since there is no existing priority rule for potential collision Case 3 (both DL and UL are semi-statically configured) and Case 4 (both DL and UL are dynamically scheduled) as for the other cases, in some implementations, a configurable priority rule can be applied to improve the resource utilization. More specifically, an FDD-HD UE experiencing collision in Case 3 or Case 4 may decide on the transmission of UL and reception of DL based on priority configured / indicated by gNB. Given that some FDD-HD use cases (e.g., the use cases of (e) RedCap) can range from sensor networks to surveillance cameras, UL transmission may often have a higher priority than DL reception in some use cases. Therefore, it may be beneficial to give the network the flexibility to indicate to the FDD-HD UE whether or not UL transmission is prioritized when UE determines that a collision will occur in either Case 3 or Case 4 or both.
[0172] In some cases, the priorities between an uplink transmission and a downlink reception can be configured, for example, via higher layer signaling. Examples of the higher layer signaling can include RRC signaling or MAC-CE signaling. The higher layer signaling may be cell common, group common, or UE specific. In some cases, the priorities can be indicated, for example, via DCI or other dynamic signaling. In some cases, the priorities can follow default or preset rules according to standards and / or protocols.
[0173] In some implementations, in TN, in the cases where configured / indicated UL transmission from a UE is cancelled due to collision with a DL reception (e.g., Case 1 / 5 / 7) , it is possible for gNB to schedule the respective UL resource to another UE since both the UE and the gNB have the same TA assumption. In the present application, cancelling an UL transmission / DL reception may include, for example, refraining from performing the UL transmission / DL reception (or stopping from performing the UL transmission / DL reception, dropping the UL transmission / DL reception) .
[0174] In some cases, a gNB can cancel a DL transmission / UL reception by, for example, refraining from transmitting the DL data / receiving the UL data, refraining from scheduling the UL reception / DL transmission, or any combinations thereof.
[0175] However, if only the existing priority rules are applied in NTN, and the gNB determines based on its TA assumption that the UE would cancel the configured / indicated UL transmission, the UE, based on the actual TA, may not determine that a collision would occur and may thus still transmit on the respective UL resource and interfere with the UL transmissions from the other UE. Hence, the uplink throughput might be adversely impacted due to such UL interference.
[0176] Therefore, in some implementations, in addition to checking the DL and UL collision based on the actually used TA, the UE can further check the UL and DL collision based on the latest reported TA, assuming gNB makes the resource scheduling based on this reported TA. If UE cancels the UL transmission on the virtually colliding symbols / slot from gNB’s perspective, gNB can safely re-schedule the UL resource to another UE. In other words, in some cases, an FDD-HD UE applies collision handling rules to a DL reception and a UL transmission involved in an actual collision determined based on the actual TA value as well as a DL reception and a UL transmission involved in a virtual collision determined from gNB’s perspective based on the TA value last known to gNB.
[0177] When an FDD-HD UE applies collision handling rules to an actual collision determined based on the actual TA value as well as a virtual collision determined from gNB’s perspective based on the TA value last known to gNB, the UE may encounter conflicts between the respective collision handling rules if an UL transmission or a DL reception is in common between the actual and virtual collisions.
[0178] FIG. 13 illustrates example conflicts between the collision handling rules if an UL transmission is in common between the actual and virtual collisions, or a DL reception is in common between the actual and virtual collisions. As shown in FIG. 13, the UE may cancel the reception of DL4 or the transmission of UL8 based on a first rule applicable to the virtual collision case as perceived at gNB, i.e., depending on the type of transmission of DL4 and UL8. Meanwhile, the UE may need to cancel the reception of DL2 or the transmission of UL8 based on a second rule applicable to a first actual collision case, depending on the type of transmission of DL2 and UL8, and the UE may also need to cancel the reception of DL4 or the transmission of UL0 based on a third rule applicable to a second actual collision case, depending on the type of transmission of DL4 and UL0.
[0179] In some cases, the UE behavior is not defined though, if the UE needs to cancel transmitting UL8 according to the first collision handling rule, e.g., to avoid UL interference if gNB allocates the respective resource to another UE, whereas transmitting UL8 is of higher priority than receiving DL2 which should thus be cancelled according to the second collision handling rule. It can be seen that cancelling the reception of DL2 in such a case not only is unnecessary, but also inefficient in terms of resource utilization since gNB could have used the resource to schedule another UE, as well as the potential impact on the procedures to transmit or receive subsequent transmission (s) associated with the content of DL2.
[0180] Similarly, in some cases, the UE behavior is not defined, if the UE needs to cancel receiving DL4 according to the first collision handling rule, e.g., assuming that the gNB would schedule the respective resource to another UE, whereas receiving DL4 is of higher priority than transmitting UL0 which should thus be cancelled according to the third collision handling rule. It can be seen that cancelling the transmission of UL0 in such a case not only is unnecessary, but also inefficient in terms of resource utilization since that UL resource is wasted, as well as the potential impact on the procedures to transmit or receive subsequent transmission (s) associated with the content of UL0.
[0181] In some cases, the techniques described herein enable to define the UE’s (e.g., FDD-HD UE’s) behavior and procedures when the UE applies collision handling rules to an actual collision determined based on the actual TA value as well as a virtual collision determined from gNB’s perspective based on the TA value last known to gNB, and the UE encounters conflicts between the respective collision handling rules. In other words, an UL transmission or a DL reception is in common between the actual and virtual collisions.
[0182] In some cases, the techniques described herein enable to define the UE’s behavior and procedures for scenarios in which the UE applies collision handling rules to an actual collision as well as a virtual collision determined from gNB’s perspective, and an UL transmission or a DL reception is in common between the actual and virtual collisions, yet the virtual collision handling rule is left to UE implementation and thus gNB is unaware whether the UE would cancel the associated DL reception or the UL transmission.
[0183] In some examples, the techniques described herein can align the understanding of gNB and UE on the cancellation of DL reception or UL transmission in common according to gNB’s perspective to improve resource utilization and avoid UL potential interference. Further, in some cases, the techniques described herein can improve resource utilization and provide the UE with more flexibility to handle the actual collision (s) .
[0184] FIG. 14 illustrates example conflicting priorities that may be encountered at UE for UL transmission / DL reception in common between an actual collision and a virtual collision. As shown in FIG. 14, in the first scenario, gNB may schedule / configure the UE for a first DL reception (DL-A 1410) in a first set of symbols and schedule / configure the UE for a second DL reception (DL-B 1420) in a second set of symbols. The first and the second set of symbols do not overlap in time domain. gNB may configure / schedule a first UL transmission (UL-A 1430) in a third set of symbols. gNB can, accounting for the latest TA reported or assumed for the UE, perceive that a collision would occur between DL-B 1420 and UL-A 1430. Such perceived collision may be called a “virtual collision” since gNB is unaware whether or not that collision would occur at the UE side.
[0185] In some cases, the virtual collision (also referred to as the first collision) occurs when an uplink transmission overlaps with a downlink reception in time domain or a time duration between the uplink transmission and the downlink reception is less than a threshold. For example, in this case, a virtual collision occurs because from gNB perspective, the third set of symbols overlaps in one or more symbols with the second set of symbols, or a first symbol of the third set of symbols starts earlier than NRx-TxTc after a last symbol of the second set of symbols, or a last symbol of the third set of symbols ends earlier than NTx-RxTc before a first symbol of the second set of symbols.
[0186] The threshold for uplink-to-downlink switch can be the same as or different from the threshold for downlink-to-uplink switch. For example, NTx-RxTc can be the same as or different from NRx-TxTc. In some cases, the threshold is preset. For example, the threshold can be pre-defined by a protocol, can be dependent on frequency carrier, or can be signalled between UE and base station (e.g., sent in a capability indication by the UE to the base station) .
[0187] In contrast, according to the actual timing at the UE side accounting for the actual TA value applied by the UE, the third set of symbols of UL-A 1430 is in a first actual collision with the first set of symbols of DL-A 1410. That is, the third set of symbols overlaps in one or more symbols with the first set of symbols, or the first symbol of the third set of symbols starts earlier than NRx-TxTc after a last symbol of the first set of symbols, or the last symbol of the third set of symbols ends earlier than NTx-RxTc before a first symbol of the first set of symbols. Therefore, UL-A 1430 is in common between the virtual collision (with DL-B 1420) for which the UE should apply a first collision handing rule associated with the applicable collision case from the previously defined Cases 1 / 2 / 5 / 6 / 7, and the first actual collision (with DL-A 1410) for which the UE should apply a second collision handing rule associated with the applicable collision case from the previously defined Cases 1-7. Note that the UE may not expect that the applicable collision case associated with the first collision handing rule is one of the defined cases Case 3 and Case 4 since such collision cases are supposed to be avoided at gNB side by proper gNB resource configuration and resource scheduling, respectively.
[0188] Intuitively, in the first scenario, there is no conflict to resolve at the UE side if the UE determines according to each of the first collision handling rule and the second collision handling rule that UL-Ais of lower priority to each of DL receptions (e.g., DL-A and DL-B) and should be cancelled (fully or partially, e.g., as with SRS transmission) ; the UE may proceed with receiving DL-A and DL-B. On the contrary, a conflict arises and requires a resolution at the UE side if the UE determines according to either one of the first collision handling rule and the second collision handling rule that UL-Ais of higher priority to a respective DL reception that hence should be cancelled, and determines according to the other collision handling rule that UL-Ais of lower priority to another respective DL reception and that UL-A should be cancelled as such.
[0189] In some examples, cancelling uplink transmission partially for SRS transmission includes cancelling the uplink transmission of the symbol (s) overlapping with those in the downlink reception that collides with the uplink transmission. In some examples, a time duration between the uplink transmission and the downlink reception is less than a threshold (e.g., NRx-TxTc or NTx-RxTc) . In such case, cancelling uplink transmission partially for SRS transmission can include cancelling the uplink transmission of the symbol (s) such that a time duration between the uplink transmission and the downlink reception is greater than or equal to the threshold.
[0190] Therefore, in some implementations, when a first condition occurs, UE can cancel a first uplink transmission or a first downlink reception according to a first procedure, where the first condition includes a first collision and a second collision, where the first collision is a collision between the first uplink transmission and the second downlink reception according to the first procedure, and the second collision is a collision between the first uplink transmission and the first downlink reception according to a second procedure.
[0191] For example, if an UL transmission (first uplink transmission, e.g., UL-A 1430 in FIG. 14) , other than PRACH or MsgA PUSCH triggered by higher layers, would be cancelled due to a collision (e.g., second collision) with a DL reception (first downlink reception, e.g., DL-A 1410 in FIG. 14) as determined by the UE according to a collision handling rule accounting for the actual TA value in use, the UL transmission is not cancelled unless the UE determines that the UL transmission should be cancelled due to a collision (e.g., first collision) with another DL reception (second downlink reception, e.g., DL-B 1420 in FIG. 14) from gNB perspective according to another collision handling rule accounting for the latest TA reported / known to gNB.
[0192] If the UE determines that the UL transmission should not be cancelled from gNB perspective according to the collision handling rule accounting for the latest TA reported / known to gNB, the UE may cancel the associated DL reception (e.g., DL-A 1410 of FIG. 14) determined by the UE as colliding with the UL transmission (e.g., UL-A 1430 of FIG. 14) in opposition to the collision handling rule accounting for the actual TA value in use.
[0193] It is noted that the exclusion above of PRACH or MsgA PUSCH triggered by higher layers is to ensure that the collision handling rule from gNB perspective is not up to UE implementation as per the specifications of some systems regarding HD collision handling rules. Other UL signals or channels may be similarly excluded if its collision with DL receptions would be up to UE implementation in prospective specifications.
[0194] In some cases, when the first condition occurs, the UE can cancel one of an uplink transmission or a downlink reception, a pair of an uplink transmission and a downlink reception, all of the uplink transmissions associated with the UE, all of the downlink receptions associated with the UE, or all of the uplink transmissions and downlink receptions associated with the UE. In some cases, except for the cancelled uplink transmission (s) and / or downlink reception (s) , the other non-cancelled transmission (s) and / or reception (s) are carried out.
[0195] Similarly, in the second scenario, which may or may not be realized concurrently with the first scenario, gNB may schedule / configure the UE for the first UL transmission (UL-A 1430) in the third set of symbols and schedule / configure the UE for a second UL transmission (UL-B 1440) in a fourth set of symbols. The third and the fourth set of symbols do not overlap in time domain. gNB may configure / schedule the second DL reception (DL-B 1420) in the second set of symbols. gNB, accounting for the latest TA reported or assumed for the UE, perceives that a collision would occur between DL-B 1420 and UL-A 1430. Again, such perceived collision may be called a “virtual collision” since gNB is unaware whether or not that collision would occur at the UE side. As such, the UE knows that from gNB perspective, the third set of symbols overlaps in one or more symbols with the second set of symbols, or the first symbol of the third set of symbols starts earlier than NRx-TxTc after the last symbol of the second set of symbols, or the last symbol of the third set of symbols ends earlier than NTx-RxTc before the first symbol of the second set of symbols.
[0196] In contrast, according to the actual timing at the UE side accounting for the actual TA value applied by the UE, the fourth set of symbols of UL-B 1440 is in a second actual collision with the second set of symbols of DL-B 1420. That is, the fourth set of symbols overlaps in one or more symbols with the second set of symbols, or a first symbol of the fourth set of symbols starts earlier than NRx-TxTc after the last symbol of the second set of symbols, or the last symbol of the fourth set of symbols ends earlier than NTx-RxTc before the first symbol of the second set of symbols. Therefore, DL-B 1420 is in common between the virtual collision (with UL-A 1430) for which the UE should apply the first collision handing rule associated with the applicable collision case from the previously defined Cases 1 / 2 / 5 / 6 / 7, and the second actual collision (with UL-B 1440) for which the UE should apply a third collision handing rule associated with the applicable collision case from the previously defined Cases 1-7. Note that the UE may not expect that the applicable collision case associated with the first collision handing rule is one of the defined cases Case 3 and Case 4 since such collision cases are supposed to be avoided at gNB side by proper gNB resource configuration and resource scheduling, respectively.
[0197] Intuitively, in the second scenario, there is no conflict to resolve at the UE side if the UE determines according to each of the first collision handling rule and the third collision handling rule that DL-B 1420 is of lower priority to each of the UL transmissions and should be cancelled; the UE may proceed with transmitting UL-A 1430 and UL-B 1440. On the contrary, a conflict arises and requires a resolution at the UE side if the UE determines according to either one of the first collision handling rule and the third collision handling rule that DL-B 1420 is of higher priority to a respective UL transmission which hence should be cancelled, and determines according to the other collision handling rule that DL-B 1420 is of lower priority to another respective UL transmission and that DL-B 1420 should be cancelled as such.
[0198] Therefore, in some implementations, when a first condition occurs, UE can cancel a second uplink transmission or a second downlink reception according to the first procedure, where the first condition includes a first collision and a third collision, where the first collision is a collision between the first uplink transmission and the second downlink reception according to the first procedure, and the third collision is a collision between the second uplink transmission and the second downlink reception according to the second procedure.
[0199] For example, if a DL reception (the second downlink reception, e.g., DL-B 1420 in FIG. 14) would be cancelled due to a collision (e.g., third collision) with a UL reception (the second uplink transmission, e.g., UL-B 1440 in FIG. 14) as determined by the UE according a collision handling rule accounting for the actual TA value in use, the DL reception is not cancelled unless the UE determines that the DL reception should be cancelled due to a collision (e.g., first collision) with another UL transmission (first uplink transmission, e.g., UL-A 1430 in FIG. 14) , other than PRACH or MsgA PUSCH triggered by higher layers, from gNB perspective according to another collision handling rule accounting for the latest TA reported / known to gNB.
[0200] If the UE determines that the DL reception should not be cancelled from gNB perspective according to the collision handling rule accounting for the latest TA reported / known to gNB, the UE may cancel instead the associated UL transmission (e.g., UL-B 1440 of FIG. 14) determined by the UE as colliding with the DL reception transmission (e.g., DL-B 1420 of FIG. 14) in opposition to the collision handling rule accounting for the actual TA value in use.
[0201] It is noted that the exclusion above of PRACH or MsgA PUSCH triggered by higher layers is to ensure that the collision handling rule from gNB perspective is not up to UE implementation as per the specifications of some systems regarding HD collision handling rules. Other UL signals or channels may be similarly excluded if its collision with DL receptions would be up to UE implementation in prospective specifications.
[0202] In some cases, the TA value last known to gNB may be based on the latest TA reported by the UE to gNB if the UE is configured for TA reporting, or otherwise, the UE may derive the TA value last known to gNB, or assumed by gNB, from the latest Koffset parameter provided to the UE for scheduling purposes being the cell specific offset or after adjusting the cell specific offset by the UE-specific Koffset, if provided to the UE. For instance, if the gNB schedules an UL transmission from the UE by a PDCCH and using a scheduling slot offset Ks, e.g., K1 or K2, the following requirement inequality should be satisfied Ks + Koffset ≥TA+ Tproc , where Tproc is the minimum processing time required by the UE from a last symbol of the scheduling PDCCH, and TA may be derived in such case as the maximum value satisfying the requirement inequality.
[0203] FIG. 15 illustrates example conflicting priorities for UL transmission / DL reception in common between an actual collision and a virtual collision of Case 1. In some cases, the first condition includes the first collision and the second collision, where the first downlink reception is semi-statically configured, the first uplink transmission is semi-statically configured, and the second downlink reception is dynamically scheduled, where the first uplink transmission has a higher priority than that of the first downlink reception, and where the performing includes cancelling the first uplink transmission. In some cases, the first condition includes the first collision and the third collision, where the first uplink transmission is semi-statically configured, the second downlink reception is dynamically scheduled, and the second uplink transmission is dynamically scheduled, where the second uplink transmission has a higher priority than that of the second downlink reception, and where the performing includes cancelling the second uplink transmission. These cases can be illustrated using FIG. 15. More details are described below.
[0204] FIG. 15 depicts an example embodiment in which the UE realizes that a virtual collision (e.g., first collision) would occur from gNB perspective between DL-B 1520 (e.g., second downlink reception) which may be a reception, in the second set of symbols, of PDSCH or CSI-RS dynamically scheduled (indicated) by a DCI format, and UL-A 1530 (e.g., first uplink transmission) which may be a transmission, in the third set of symbols, of SRS, or PUCCH, or PUSCH configured by higher layers. The virtual collision may be due to overlap in time domain, e.g., the second set of symbols being a subset of the third set of symbols. Hence, the UE should apply the first collision handling rule to DL-B 1520 and UL-A 1530 in accordance with collision Case 1 as follows:
[0205] - the UE should cancel UL-A 1530 being a transmission of PUCCH, PUSCH, or an actual repetition of PUSCH, if the first symbol in the third set of symbols occurs after Tproc, 2 relative to a last symbol of a PDCCH reception where the UE detects the DCI format; or partially cancel UL-A 1530 being a transmission of SRS in symbols (from the subset of the third set of symbols) that occur after Tproc, 2 relative to a last symbol of the PDCCH reception where the UE detects the DCI format;
[0206] - otherwise, the UE may cancel DL-B 1520 instead.
[0207] Tproc, 2 is the PUSCH preparation time for UE processing capability 1 according to the specifications of some systems assuming d2, 1=1 and μ corresponding to the smallest SCS configuration between the SCS configuration of the PDCCH carrying the DCI format and the SCS configuration of the SRS, PUCCH, or PUSCH.
[0208] The UE, accounting for the actual TA value, further realizes that a first actual collision (e.g., second collision) would occur between UL-A 1530 and DL-A 1510 (e.g., first downlink reception) which may be a reception configured by dedicated higher layer parameters of a PDCCH, PDSCH, CSI-RS, or DL PRS, or a reception of a Type-0 / 0A / 1 / 2-PDCCH in a CSS configured by higher layer parameters. Hence, the UE should apply the second collision handling rule to UL-A 1530 and DL-A 1510 in accordance with collision Case 3, yet with the following conditions:
[0209] - if the UE has determined that UL-A 1530 should be cancelled (fully or partially) based on the first collision handling rule, and if the UE has determined that DL-A 1510 should be cancelled based on the second collision handling rule by default, or based on a configuration by a higher layer parameter, to prioritize UL transmission in such collision cases (Case 3) , the UE does not cancel DL-A 1510 and cancels UL-A 1530 instead;
[0210] - otherwise, the UE may cancel DL-A 1510 and proceed with UL-A 1530, as applicable.
[0211] The UE, accounting for the actual TA value, may further realize that a second actual collision (e.g., third collision) would occur between DL-B 1520 and UL-B 1540 (e.g., second uplink transmission) which may be transmission of a PUSCH, PUCCH, PRACH, or SRS, indicated by a DCI format. Hence, the UE should apply the third collision handling rule to UL-B 1540 and DL-B 1520 in accordance with collision Case 4, yet with the following conditions:
[0212] - if the UE has determined that UL-A 1530 should be cancelled based on the first collision handling rule, and if the UE has determined that DL-B 1520 should be cancelled based on the third collision handling rule by default, or based on a configuration by a higher layer parameter or an indication in either the DCI format scheduling UL-B 1540 or the DCI format scheduling DL-B 1520, to prioritize UL transmission in such collision cases (Case 4) , the UE does not cancel DL-B 1520 and cancels UL-B 1540 instead;
[0213] - otherwise, the UE may cancel DL-B 1520 and proceed with UL-B 1540, as applicable.
[0214] FIGS. 16-17 illustrate example conflicting priorities for UL transmission / DL reception in common between an actual collision and a virtual collision of Case 2.
[0215] In some cases, the first condition includes the first collision and the second collision, where the first downlink reception is dynamically scheduled, the first uplink transmission is dynamically scheduled, and the second downlink reception is semi-statically configured, where the first downlink reception has a higher priority than that of the first uplink transmission, and where the performing includes cancelling the first downlink reception. In some cases, the first condition includes the first collision and the third collision, where the first uplink transmission is dynamically scheduled, the second downlink reception is semi-statically configured, and the second uplink transmission is semi-statically configured, where the second downlink reception has a higher priority than that of the second uplink transmission, and where the performing includes cancelling the second downlink reception. These cases can be illustrated using, for example, FIG. 16. More details are described below.
[0216] In some cases, the first downlink reception includes a synchronization signal block (SSB) , and the first uplink transmission is cancelled. These cases can be illustrated using, for example, FIG. 17. More details are described below.
[0217] FIGS. 16-17 depict example embodiments in which the UE realizes that a virtual collision (e.g., first collision) would occur from gNB perspective between DL-B (e.g., second downlink reception) which may be a reception configured by higher layer parameters of a PDCCH, PDSCH, CSI-RS, or DL PRS, in the second set of symbols (e.g., DL-B 1620 of FIG. 16 or DL-B 1720 of FIG. 17) , and UL-A (e.g., first uplink transmission) which may be a transmission, in the third set of symbols, of a PUSCH, or PUCCH, or PRACH, or SRS in at least one symbol of the second set of symbols, that is indicated by a DCI format (e.g., UL-A 1630 of FIG. 16 or UL-A 1730 of FIG. 17) . Hence, the UE should apply the first collision handling rule to DL-B and UL-A in accordance with collision Case 2 as follows:
[0218] - the UE should cancel DL-B, and proceeds with UL-A, if the UE detects the DCI format indicating UL-A;
[0219] - otherwise, the UE should proceed with DL-B.
[0220] The UE, accounting for the actual TA value, further realizes that a first actual collision (e.g., second collision) would occur between UL-A and DL-A (e.g., first downlink reception) which may be a reception, in the first set of symbols, of a PDSCH or CSI-RS, indicated by a DCI format (e.g., DL-A 1610 of FIG. 16) , or may be a reception of SSB (e.g., DL-A 1710 of FIG. 17) where the UE is indicated of the presence of SSB within the active DL BWP by ssb-PositionsInBurst in SIB1 or in ServingCellConfigCommon or by NonCellDefiningSSB.
[0221] The UE may also realize that a second actual collision (e.g., third collision) would occur between DL-B and UL-B (e.g., second uplink transmission) which may be a transmission, in the fourth set of symbols, of SRS, or PUCCH, or PUSCH configured by higher layers (e.g., UL-B 1640 of FIG. 16 or UL-B 1740 of FIG. 17) . Hence, the UE should apply the second collision handling rule to UL-A and DL-A in accordance with collision Case 4 (e.g., as shown in FIG. 16) or Case 5 with SSB (e.g., as shown in FIG. 17) , and apply the third collision handling rule to UL-B and DL-B in accordance with Case 3 (e.g., as shown in FIG. 16 or FIG. 17) , yet with the following conditions:
[0222] - if the UE has determined that DL-B should be cancelled based on the first collision handling rule, and if the UE has determined that UL-A should be cancelled based on the second collision handling rule by default, or based on a configuration by a higher layer parameter or an indication in either the DCI format scheduling UL-A or the DCI format scheduling DL-A, to prioritize UL transmission in such collision cases (Case 4) , the UE does not cancel UL-A and cancels DL-A instead (Case 4, e.g., cancelling DL-A 1610 shown in FIG. 16) , or cancels both UL-A and DL-B (Case 5 with SSB, e.g., cancelling UL-A 1730 and DL-B 1720 shown in FIG. 17) ;
[0223] - if the UE has determined that DL-B should be cancelled based on the first collision handling rule, and if the UE has determined that UL-B should be cancelled based on the third collision handling rule by default, or based on a configuration by a higher layer parameter or an indication in the DCI format scheduling UL-B, to prioritize DL reception in such collision cases (Case 4) , the UE does not cancel UL-B and cancels DL-B instead (e.g., cancelling DL-B 1620 shown in FIG. 16) ;
[0224] - otherwise, the UE may cancel UL-A and UL-B and proceed with DL-A and DL-B, as applicable.
[0225] FIGS. 18-20 illustrate example conflicting priorities for UL transmission / DL reception in common between an actual collision and a virtual collision of Case 5.
[0226] In some cases, the first condition includes the first collision and the second collision, where the first downlink reception is semi-statically configured, the first uplink transmission is dynamically scheduled, and the second downlink reception includes an SSB, and where the performing includes cancelling the first uplink transmission. These cases can be illustrated using, for example, FIG. 18. More details are described below.
[0227] In some cases, the first condition includes the first collision and the second collision, where the first downlink reception is dynamically scheduled, the first uplink transmission is dynamically scheduled, and the second downlink reception includes an SSB, where the first uplink transmission has a higher priority than that of the first downlink reception, and where the performing includes cancelling the first uplink transmission. These cases can be illustrated using, for example, FIG. 19. More details are described below.
[0228] In some cases, the first condition includes the first collision and the third collision, where the first uplink transmission is dynamically scheduled, the second downlink reception includes an SSB, and the second uplink transmission is dynamically scheduled or semi-statically configured, and where the performing includes cancelling the second uplink transmission. These cases can be illustrated using, for example, FIG. 19 or FIG. 20. More details are described below.
[0229] FIGS. 18-20 depict example embodiments in which the UE realizes that a virtual collision (e.g., first collision) would occur from gNB perspective between DL-B (e.g., second downlink reception) which may be a reception of SSB, in the second set of symbols (e.g., DL-B 1820 of FIG. 18, DL-B 1920 of FIG. 19, or DL-B 2020 of FIG. 20) , where the UE is indicated of the presence of SSB within the active DL BWP by ssb-PositionsInBurst in SIB1 or in ServingCellConfigCommon or by NonCellDefiningSSB, and UL-A (e.g., first uplink transmission) which may be a transmission, in the third set of symbols, of a PRACH, or PUSCH, or PUCCH, or SRS, that is indicated by a DCI format (e.g., UL-A 1830 of FIG. 18, UL-A 1930 of FIG. 19, or UL-A 2030 of FIG. 20) . Hence, the UE should apply the first collision handling rule to DL-B and UL-A in accordance with collision Case 5 as follows:
[0230] - the UE should cancel UL-A fully or partially for SRS transmission in any symbol that would collide with the reception in the second set of symbols.
[0231] The UE, accounting for the actual TA value, further realizes that a first actual collision (e.g., second collision) would occur between UL-A and DL-A (e.g., first downlink reception) which may be a reception, in the first set of symbols, of a PDSCH or CSI-RS, indicated by a DCI format (e.g., DL-A 1910 of FIG. 19 or DL-A 2010 of FIG. 20) , or may be a reception configured by higher layer parameters of a PDCCH, PDSCH, CSI-RS, or DL PRS, in the first set of symbols (e.g., DL-A 1810 of FIG. 18) . Hence, the UE should apply the second collision handling rule to UL-A and DL-A in accordance with collision Case 4 (e.g., as shown in FIG. 19) or Case 2 (e.g., as shown in FIG. 18) , respectively, yet with the following conditions:
[0232] - if the UE has determined that UL-A should be cancelled based on the first collision handling rule, and if the UE has determined that DL-A should be cancelled based on the second collision handling rule by default (Case 2, e.g., as shown in FIG. 18) , or based on a configuration by a higher layer parameter or an indication in either the DCI format scheduling UL-A or the DCI format scheduling DL-A, to prioritize UL transmission in such collision cases (Case 4, e.g., as shown in FIG. 19) , the UE does not cancel DL-A and cancels UL-A instead (e.g., cancelling UL-A 1830 shown in FIG. 18 and cancelling UL-A 1930 shown in FIG. 19) ;
[0233] - otherwise, the UE may cancel DL-A and UL-B and proceed with UL-A and DL-B, as applicable.
[0234] The UE may also realize that a second actual collision (e.g., third collision) would occur between DL-B and UL-B (e.g., second uplink transmission) which may be a transmission, in the fourth set of symbols, of a PRACH, or PUSCH, or PUCCH, or SRS, indicated by a DCI format (e.g., UL-B 1840 of FIG. 18 or UL-B 1940 of FIG. 19) , or may be at transmission of a PUSCH, or PUCCH, or SRS based on a configuration by higher layers (e.g., UL-B 2040 of FIG. 20) . Hence, the UE should apply the third collision handling rule to UL-B and DL-B in accordance with Case 5 (e.g., as shown in FIG. 18 or FIG. 19) or Cases 5 / 7 (e.g., as shown in FIG. 20) , respectively, that is:
[0235] - if the UE has determined that UL-A should be cancelled based on the first collision handling rule, and if the UE has determined that UL-B should be cancelled based on the third collision handling rule, the UE cancels UL-B fully or partially for SRS (e.g., cancelling UL-B 1840 shown in FIG. 18, cancelling UL-B 1940 shown in FIG. 19, or cancelling UL-B 2040 shown in FIG. 20) .
[0236] FIGS. 21-22 illustrate example conflicting priorities for UL transmission / DL reception in common between an actual collision and a virtual collision of Case 5 or Case 7.
[0237] In some cases, the first condition includes the first collision and the second collision, where the first downlink reception is semi-statically configured, the first uplink transmission is semi-statically configured, and the second downlink reception includes an SSB, where the first uplink transmission has a higher priority than that of the first downlink reception, and where the performing includes cancelling the first uplink transmission. These cases can be illustrated using, for example, FIG. 21 or FIG. 22. More details are described below.
[0238] In some cases, the first condition includes the first collision and the third collision, where the first uplink transmission is semi-statically configured, the second downlink reception includes an SSB, and the second uplink transmission is dynamically scheduled or semi-statically configured, and where the performing includes cancelling the second uplink transmission. These cases can be illustrated using, for example, FIG. 21 or FIG. 22. More details are described below.
[0239] FIGS. 21-22 depict example embodiments in which the UE realizes that a virtual collision (e.g., first collision) would occur from gNB perspective between DL-B (e.g., second downlink reception) which may be a reception of SSB, in the second set of symbols (e.g., DL-B 2120 of FIG. 21 or DL-B 2220 of FIG. 22) , where the UE is indicated of the presence of SSB within the active DL BWP by ssb-PositionsInBurst in SIB1 or in ServingCellConfigCommon or by NonCellDefiningSSB, and UL-A (e.g., first uplink transmission) which may be a transmission, in the third set of symbols, of a PUSCH, or PUCCH, or SRS, based on a configuration by higher layers (e.g., UL-A 2130 of FIG. 21 or UL-A 2230 of FIG. 22) . Hence, the UE should apply the first collision handling rule to DL-B and UL-A in accordance with collision Cases 5 / 7 as follows:
[0240] - the UE should cancel UL-A fully or partially for SRS transmission in any symbol that would collide with the reception in the second set of symbols.
[0241] The UE, accounting for the actual TA value, further realizes that a first actual collision (e.g., second collision) would occur between UL-A and DL-A (e.g., first downlink reception) which may be a reception configured by higher layer parameters of a PDCCH, PDSCH, CSI-RS, or DL PRS, in the first set of symbols (e.g., DL-A 2110 of FIG. 21 or DL-A 2210 of FIG. 22) . Hence, the UE should apply the second collision handling rule to UL-A and DL-A in accordance with collision Case 3, yet with the following conditions:
[0242] - if the UE has determined that UL-A should be cancelled based on the first collision handling rule, and if the UE has determined that DL-A should be cancelled based on the second collision handling rule by default, or based on a configuration by a higher layer parameter, to prioritize UL transmission in such collision cases (Case 3, e.g., as shown in FIG. 21) , the UE does not cancel DL-A and cancels UL-A instead (e.g., cancelling UL-A 2130 shown in FIG. 21) ;
[0243] - otherwise, the UE may cancel DL-A and UL-B and proceed with UL-A and DL-B, as applicable.
[0244] The UE may also realize that a second actual collision (e.g., third collision) would occur between DL-B and UL-B (e.g., second uplink transmission) which may be a transmission, in the fourth set of symbols, of a PRACH, or PUSCH, or PUCCH, or SRS, indicated by a DCI format (e.g., UL-B 2140 of FIG. 21) , or may be at transmission of a PUSCH, or PUCCH, or SRS based on a configuration by higher layers (e.g., UL-B 2240 of FIG. 22) . Hence, the UE should apply the third collision handling rule to UL-B and DL-B in accordance with Case 5 (e.g., as shown in FIG. 21) or Cases 5 / 7 (e.g., as shown in FIG. 22) , respectively, that is:
[0245] - if the UE has determined that UL-A should be cancelled based on the first collision handling rule, and if the UE has determined that UL-B should be cancelled based on the third collision handling rule, the UE cancels UL-B fully or partially for SRS (e.g., cancelling UL-B 2140 shown in FIG. 21 and cancelling UL-B 2240 shown in FIG. 22) .
[0246] FIG. 23 illustrates example conflicting priorities for UL transmission / DL reception in common between an actual collision and a virtual collision of Case 6 or Case 7. In particular, FIG. 23 describes the UE procedures for scenarios in which the FDD-HD UE applies collision handling rules to an actual collision as well as a virtual collision determined from gNB’s perspective, and an UL transmission or a DL reception is in common between the actual and virtual collisions, yet the virtual collision handling rule is left to UE implementation and thus gNB is unaware whether the UE would cancel the associated DL reception or the UL transmission.
[0247] FIG. 23 depicts an example embodiment in which the UE realizes that a virtual collision would occur from gNB perspective between DL-B which may be a reception of SSB, in the second set of symbols, where the UE is indicated of the presence of SSB within the active DL BWP by ssb-PositionsInBurst in SIB1 or in ServingCellConfigCommon or by NonCellDefiningSSB, a reception of PDCCH / PDSCH / CSI-RS / DL-PRS configured by higher layers, or a reception of PDSCH / CSI-RS indicated by a DCI format, and UL-A which may be a PRACH / MsgA PUSCH transmission, in the third set of symbols, or a potential PRACH / MsgA transmission in a valid RACH Occasion (RO) . Hence, the UE should apply the first collision handling rule to DL-B and UL-A in accordance with collision Cases 6 / 7. That is, the UE can select based on its implementation whether to either transmit the PRACH or the MsgA PUSCH or receive the PDSCH, or the CSI-RS, or the DL PRS, or the PDCCH, or the SSB.
[0248] Since the decision as to whether to cancel or proceed with either UL-A or DL-B or both is left to UE implementation, gNB may not allocate the respective UL resources to other UEs when it determines that such virtual collision would occur. gNB may attempt as such to decode UL-A and DL-B simultaneously given its FDD-FD capability.
[0249] As shown in FIG. 23, UE may not involve the virtual collision in deciding on DL / UL cancellation for actual collisions. UL-A and DL-B can be performed together or cancelled independently from each other.
[0250] Therefore, in some cases, it can be specified that the collision handling procedures for an UL transmission or a DL reception associated with a virtual collision determined by an FDD-HD UE from gNB perspective based on the latest TA reported / known to gNB, where the UL transmission is a PRACH / MsgA PUSCH transmission triggered by higher layers, are conducted based on the respective actual collisions based on the actual TA value in use and their associated collision handling rules.
[0251] It is noted that the exclusion above of PRACH or MsgA PUSCH triggered by higher layers is to ensure that the collision handling rule from gNB perspective is not up to UE implementation as per the specifications in some systems of HD collision handling rules. Other UL signals or channels may be similarly excluded if its collision with DL receptions would be up to UE implementation in prospective specifications.
[0252] The TA value last known to gNB may be based on the latest TA reported by the UE to gNB if the UE is configured for TA reporting, or otherwise, the UE may derive the TA value last known to gNB, or assumed by gNB, from the latest Koffset parameter provided to the UE for scheduling purposes being the cell specific offset or after adjusting the cell specific offset by the UE-specific Koffset, if provided to the UE. For instance, if the gNB schedules an UL transmission from the UE by a PDCCH and using a scheduling slot offset Ks, e.g., K1 or K2, the following requirement inequality should be satisfied Ks +Koffset ≥ TA+ Tproc , where Tproc is the minimum processing time required by the UE from a last symbol of the scheduling PDCCH; TA may be derived in such case as the maximum value satisfying the requirement inequality.
[0253] In the present disclosure, the terms “a” or “an” are defined to mean “at least one” , that is, these terms do not exclude a plural number of items, unless stated otherwise.
[0254] In the present disclosure, terms such as “substantially” , “generally” and “about” , which modify a value, condition or characteristic of a feature of an example embodiment, should be understood to mean that the value, condition or characteristic is defined within tolerances that are acceptable for the proper operation of the example embodiment for its intended application.
[0255] In the present disclosure, unless stated otherwise, the terms “connected” and “coupled” , and derivatives and variants thereof, refer herein to any structural or functional connection or coupling, either direct or indirect, between two or more elements. For example, the connection or coupling between the elements can be acoustical, mechanical, optical, electrical, thermal, logical, or any combinations thereof.
[0256] In the present disclosure, expressions such as “match” , “matching” and “matched” , including variants and derivatives thereof, are intended to refer herein to a condition in which two or more elements are either the same or within some predetermined tolerance of each other. That is, these terms are meant to encompass not only “exactly” or “identically” matching the two elements but also “substantially” , “approximately” or “subjectively” matching the two or more elements, as well as providing a higher or best match among a plurality of matching possibilities.
[0257] In the present disclosure, the expression “based on” is intended to mean “based at least partly on” , that is, this expression can mean “based solely on” or “based partially on” , and so should not be interpreted in a limited manner. More particularly, the expression “based on” could also be understood as meaning “depending on” , “representative of” , “indicative of” , “associated with” or similar expressions.
[0258] In the present disclosure, the terms "system" and "network" may be used interchangeably in different embodiments of this application. "At least one" means one or more, and "a plurality of" means two or more. The term "and / or" describes an association relationship of associated objects, and indicates that three relationships may exist. For example, A and / or B may indicate the following three cases: Only A exists, both A and B exist, and only B exists, where A and B may be singular or plural. The character " / " indicates an "or" relationship between associated objects. "At least one of the following items (pieces) " or a similar expression thereof indicates any combination of these items, including a single item (piece) or any combination of a plurality of items (pieces) . For example, "at least one of A, B, or C" includes: only A; only B; only C; A and B; A and C; B and C; or A, B, and C, and "at least one of A, B, and C" may also be understood as including: only A; only B; only C; A and B; A and C; B and C; or A, B, and C. In addition, unless otherwise specified, ordinal numbers such as "first" and "second" in embodiments of this application are used to distinguish between a plurality of objects, and are not used to limit a sequence, a time sequence, priorities, or importance of the plurality of objects.
[0259] A person skilled in the art should understand that embodiments of this application may be provided as a method, an apparatus (or system) , computer-readable storage medium, or a computer program product. Therefore, this application may use a form of a hardware-only embodiment, a software-only embodiment, or an embodiment with a combination of software and hardware. Moreover, this application may use a form of a computer program product that is implemented on one or more computer-usable storage media (including but not limited to a disk memory, an optical memory, and the like) that include computer-usable program code.
[0260] This application is described with reference to the flowcharts and / or block diagrams of the method, the device (system) , and the computer program product according to this application. It should be understood that computer program instructions may be used to implement each process and / or each block in the flowcharts and / or the block diagrams and a combination of a process and / or a block in the flowcharts and / or the block diagrams. The computer program instructions may be provided for a general-purpose computer, a dedicated computer, an embedded processor, or a processor of another programmable data processing device and enable a machine to execute the instructions. When executed by any computer or the processor of a programmable data processing device, the instructions cause the apparatus to implement specific functions as described in one or more procedures in the flowcharts and / or one or more blocks in the block diagrams. The computer program instructions may alternatively be stored in a computer-readable memory that can indicate a computer or another programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate an artifact that includes an instruction apparatus. The instruction apparatus implements a specific function in one or more procedures in the flowcharts and / or one or more blocks in the block diagrams.
[0261] The computer program instructions may alternatively be loaded onto a computer or another programmable data processing device, so that a series of operations and steps are performed on the computer or the another programmable device, so that computer-implemented processing is generated. Therefore, the instructions executed on the computer or on another programmable device provide steps for implementing specific functions as described in one or more procedures in the flowcharts and / or one or more blocks in the block diagrams.
[0262] It is clear that a person skilled in the art can make various modifications and variations to this application without departing from the scope of this disclosure. This disclosure is intended to cover these modifications and variations of this application provided that they fall within the scope of protection defined by the following claims and their equivalent technologies.
Claims
1.A method comprising:when a first condition occurs, performing at least one of the following:cancelling a first uplink transmission or a first downlink reception according to a first procedure, orcancelling a second uplink transmission or a second downlink reception according to the first procedure, whereinthe first condition comprises a first collision and at least one of a second collision or a third collision, wherein the first collision is a collision between the first uplink transmission and the second downlink reception according to the first procedure, the second collision is a collision between the first uplink transmission and the first downlink reception according to a second procedure, and the third collision is a collision between the second uplink transmission and the second downlink reception according to the second procedure.2.The method according to claim 1, wherein the first collision comprises the first uplink transmission overlapping with the second downlink reception in time domain according to the first procedure or a time duration between the first uplink transmission and the second downlink reception being less than a first threshold according to the first procedure.3.The method according to claim 1 or 2, wherein the second collision comprises the first uplink transmission overlapping with the first downlink reception in time domain according to the second procedure or a time duration between the first uplink transmission and the first downlink reception being less than a second threshold according to the second procedure.4.The method according to any one of claims 1 to 3, wherein the third collision comprises the second uplink transmission overlapping with the second downlink reception in time domain according to the second procedure or a time duration between the second uplink transmission and the second downlink reception is less than a third threshold according to the second procedure.5.The method according to any one of claims 1 to 4, wherein each of the first uplink transmission and the second uplink transmission comprises at least one of a sounding reference signal (SRS) , a physical uplink shared channel (PUSCH) , or a physical uplink control channel (PUCCH) .6.The method according to any one of claims 1 to 5, wherein the first procedure is based on a last reported timing advance (TA) value or an obtained TA value, and the second procedure is based on a current TA value.7.The method according to any one of claims 1 to 6, wherein at least one of the first uplink transmission, the second uplink transmission, the first downlink reception, or the second downlink reception is between a user equipment (UE) and a non-terrestrial network (NTN) base station.8.The method according to any one of claims 1 to 7, wherein cancelling the first uplink transmission or the second uplink transmission comprises cancelling a portion of the first uplink transmission or a portion of the second uplink transmission, and wherein the first uplink transmission or the second uplink transmission comprises an SRS transmission.9.The method according to any one of claims 1 to 8, wherein the first downlink reception comprises a synchronization signal block (SSB) , and the first uplink transmission is cancelled.10.The method according to claim 1, wherein the first condition comprises the first collision and the second collision, wherein the first downlink reception is semi-statically configured, the first uplink transmission is semi-statically configured, and the second downlink reception is dynamically scheduled, wherein the first uplink transmission has a higher priority than that of the first downlink reception, and wherein the performing comprises cancelling the first uplink transmission.11.The method according to claim 1 or 10, wherein the first condition comprises the first collision and the third collision, wherein the first uplink transmission is semi-statically configured, the second downlink reception is dynamically scheduled, and the second uplink transmission is dynamically scheduled, wherein the second uplink transmission has a higher priority than that of the second downlink reception, and wherein the performing comprises cancelling the second uplink transmission.12.The method according to claim 1, wherein the first condition comprises the first collision and the second collision, wherein the first downlink reception is dynamically scheduled, the first uplink transmission is dynamically scheduled, and the second downlink reception is semi-statically configured, wherein the first downlink reception has a higher priority than that of the first uplink transmission, and wherein the performing comprises cancelling the first downlink reception.13.The method according to claim 1 or 12, wherein the first condition comprises the first collision and the third collision, wherein the first uplink transmission is dynamically scheduled, the second downlink reception is semi-statically configured, and the second uplink transmission is semi-statically configured, wherein the second downlink reception has a higher priority than that of the second uplink transmission, and wherein the performing comprises cancelling the second downlink reception.14.The method according to claim 1, wherein the first condition comprises the first collision and the second collision, wherein the first downlink reception is semi-statically configured, the first uplink transmission is dynamically scheduled, and the second downlink reception comprises an SSB, and wherein the performing comprises cancelling the first uplink transmission.15.The method according to claim 1, wherein the first condition comprises the first collision and the second collision, wherein the first downlink reception is dynamically scheduled, the first uplink transmission is dynamically scheduled, and the second downlink reception comprises an SSB, wherein the first uplink transmission has a higher priority than that of the first downlink reception, and wherein the performing comprises cancelling the first uplink transmission.16.The method according to any one of claims 1, 14, and 15, wherein the first condition comprises the first collision and the third collision, wherein the first uplink transmission is dynamically scheduled, the second downlink reception comprises an SSB, and the second uplink transmission is dynamically scheduled or semi-statically configured, and wherein the performing comprises cancelling the second uplink transmission.17.The method according to claim 1, wherein the first condition comprises the first collision and the second collision, wherein the first downlink reception is semi-statically configured, the first uplink transmission is semi-statically configured, and the second downlink reception comprises an SSB, wherein the first uplink transmission has a higher priority than that of the first downlink reception, and wherein the performing comprises cancelling the first uplink transmission.18.The method according to claim 1 or 17, wherein the first condition comprises the first collision and the third collision, wherein the first uplink transmission is semi-statically configured, the second downlink reception comprises an SSB, and the second uplink transmission is dynamically scheduled or semi-statically configured, and wherein the performing comprises cancelling the second uplink transmission.19.A communication apparatus, configured to perform the method according to any one of claims 1 to 18.20.The communication apparatus of claim 19, comprising:processing unit, configured to, when a first condition occurs, perform at least one of the following:cancelling a first uplink transmission or a first downlink reception according to a first procedure, orcancelling a second uplink transmission or a second downlink reception according to the first procedure, whereinthe first condition comprises a first collision and at least one of a second collision or a third collision, wherein the first collision is a collision between the first uplink transmission and the second downlink reception according to the first procedure, the second collision is a collision between the first uplink transmission and the first downlink reception according to a second procedure, and the third collision is a collision between the second uplink transmission and the second downlink reception according to the second procedure.21.The communication apparatus of claim 19, comprising:one or more processors, configured to, when a first condition occurs, perform at least one of the following:cancelling a first uplink transmission or a first downlink reception according to a first procedure, orcancelling a second uplink transmission or a second downlink reception according to the first procedure, whereinthe first condition comprises a first collision and at least one of a second collision or a third collision, wherein the first collision is a collision between the first uplink transmission and the second downlink reception according to the first procedure, the second collision is a collision between the first uplink transmission and the first downlink reception according to a second procedure, and the third collision is a collision between the second uplink transmission and the second downlink reception according to the second procedure.22.An apparatus comprising:one or more processors; anda memory storing instructions which, when executed by the one or more processors, cause the apparatus to perform the method of any one of claims 1 to 18.23.A communication system, wherein the communication system comprises a communication apparatus configured to perform the method of any one of claims 1 to 18.24.A non-transitory computer-readable storage medium having instructions stored thereon which, when executed by an apparatus, cause the apparatus to perform the method of any one of claims 1 to 18.25.A computer program product comprising a non-transitory computer readable medium storing programming, the programming including instructions to perform the method of any one of claims 1 to 18.
Citation Information
Patent Citations
Collision handling for physical uplink channel repetition
WO2020041475A1
Uplink channel collision processing method and apparatus
WO2021228068A1
Transmission control method and apparatus, and communication device
WO2022017505A1
Terminal and communication method thereof in wireless communication system
WO2023132701A1