Demodulation reference signal (DMRS) bundling in non-terrestrial network (NTN)

Abstract

Methods are described for providing an indication of demodulation reference signal (DMRS) bundling size for use with a non-terrestrial network (e.g., a satellite) in a next generation wireless communication network. These methods address varying timing advance (TA) due to fast movement of the satellite. One method describes a process for dynamic indication of the DRMS bundling size. In the method, the network receives an actual time domain window (TDW) size from a user equipment (UE) and performs joint channel estimation based on the TDW indicated by the UE. In another method, the process provides a semi-static indication of the DRMS bundling size based on a received UE capability report regarding a TDW duration and an uplink segment duration.

Description

Background Art Technical Field

[0001] Various aspects may generally relate to the field of wireless communications. Summary of the invention

[0002] Aspects of the methods described herein include a method for providing a dynamic indication of a demodulation reference signal (DMRS) bundling size in a wireless communication network having a satellite by a user equipment (UE). The method includes receiving a maximum allowed timing advance (TA) change for DMRS bundling from the wireless communication network, and also includes reporting a time domain window (TDW) duration capability to the wireless communication network. The method also includes: receiving a configuration grant for a physical uplink shared channel (PUSCH) from the wireless communication network, the configuration grant indicating the DMRS bundling size; and determining an actual TDW size for PUSCH DMRS bundling based on an estimated TA change compared to the maximum allowed TA change. The method also includes reporting the actual TDW size for PUSCH DMRS bundling to the wireless communication network using a PUSCH channel.

[0003] Aspects of the methods described herein also include a method for providing a dynamic indication of a demodulation reference signal (DMRS) bundling size to a user equipment (UE) by a wireless communication network having a satellite. The method includes determining, by the wireless communication network, a maximum allowed timing advance (TA) change for DMRS bundling, and also includes receiving, by the wireless communication network, a time domain window (TDW) duration capability from the UE. The method also includes: scheduling, by the wireless communication network, a configuration grant for a PUSCH channel for the UE, the configuration grant indicating a DMRS bundling size, and the DMRS bundling size is based on the TDW duration capability of the UE; and receiving an actual TDW size for PUSCH DMRS bundling from the UE. The method also includes performing joint channel estimation based on the actual TDW size for PUSCH DMRS bundling.

[0004] Aspects of the methods described herein include a user equipment (UE) comprising a radio frequency (RF) transceiver having an antenna, and a processing circuit coupled to the RF transceiver. The RF transceiver is configured to receive a maximum allowed timing advance (TA) change for DMRS bundling from a wireless communication network, and transmit a time domain window (TDW) duration capability to the wireless communication network. The RF transceiver is further configured to receive a configuration grant for a PUSCH channel from the wireless communication network, the configuration grant indicating a DMRS bundling size. The processing circuit is configured to determine an actual TDW size for PUSCH DMRS bundling based on an estimated TA change compared to the maximum allowed TA change. The RF transceiver is further configured to report the actual TDW size for PUSCH DMRS bundling to the wireless communication network via the antenna using the PUSCH channel.

[0005] Aspects of the method include a method for providing a semi-static indication of a demodulation reference signal (DMRS) bundling size in a wireless communication network having a satellite by a user equipment (UE). The method includes receiving an uplink segment transmission duration for DMRS bundling from the wireless communication network, and reporting a time domain window (TDW) duration capability to the wireless communication network. The method also includes receiving a configuration grant for a PUSCH channel from the wireless communication network, the configuration grant indicating a DMRS bundling size. The method also includes transmitting a configuration grant for the PUSCH channel using the indicated PUSCH DMRS bundling.

[0006] Aspects of the method of the present invention include a method for providing a semi-static indication of a demodulation reference signal (DMRS) bundling size to a user equipment (UE) by a wireless communication network having a satellite. The method includes indicating, by the wireless communication network, an uplink segment transmission duration, and receiving, by the wireless communication network, a time domain window (TDW) duration capability from the UE. The method also includes: scheduling, by the wireless communication network, a configuration grant for a PUSCH channel for the UE, the configuration grant indicating a DMRS bundling size, wherein the DMRS bundling size is based on the TDW duration capability of the UE and based on the uplink segment transmission duration. The method also includes performing joint channel estimation based on an actual TDW size for PUSCH DMRS bundling.

[0007] Aspects of the method of the present invention include a user equipment (UE) comprising a radio frequency (RF) transceiver having an antenna and a processing circuit coupled to the RF transceiver. The RF transceiver is configured to receive an uplink segment transmission duration for DMRS bundling from a wireless communication network, and also includes a time domain window (TDW) duration capability to transmit to the wireless communication network. The RF transceiver is also configured to receive a configuration grant for a PUSCH channel from the wireless communication network, the configuration grant indicating a DMRS bundling size. The processing circuit is configured to transmit a configuration grant for a PUSCH channel using the indicated PUSCH DMRS bundling.

[0008] The present invention is provided for the purpose of illustrating some aspects only, so as to provide an understanding of the subject matter described herein. Therefore, the above-mentioned features are only examples and should not be understood as narrowing the scope or essence of the subject matter in the present disclosure. Other features, aspects and advantages of the present disclosure will become apparent from the following detailed description, drawings and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and enable those skilled in the relevant art to make and use the present disclosure.

[0010] Figure 1 An example system that implements DMRS bundling between a user equipment (UE) and a satellite in a wireless communication network in accordance with some aspects of the present disclosure is illustrated.

[0011] Figure 2 A block diagram illustrating an example system of an electronic device implementing mechanisms for DMRS bundling for communications with a satellite in accordance with some aspects of the present disclosure.

[0012] Figure 3 Joint channel estimation using DMRS bundling in accordance with aspects of the present disclosure is illustrated, and an exemplary time domain window (TDW) of a time slot is illustrated.

[0013] Figure 4A Physical time slot based TDW counting according to aspects of the present disclosure is illustrated.

[0014] Figure 4B A sequence of consecutive time slots 430 is illustrated in accordance with aspects of the present disclosure.

[0015] Figure 5A and Figure 5B A specific implementation of dynamic indication of DMRS bundling size according to aspects of the present disclosure is illustrated.

[0016] Fig. 6A and Figure 6B An indication of actual TDW size according to aspects of the present disclosure is illustrated.

[0017] Fig. 7A and Figure 7B Semi-static indication of DMRS bundling size according to aspects of the present disclosure is illustrated.

[0018] Figure 8 Timing advance in the context of aspects of the present disclosure is illustrated.

[0019] Fig. 9 An exemplary computer system for implementing some aspects or portions thereof.

[0020] The present disclosure is described with reference to the accompanying drawings. In the drawings, generally, like reference numerals indicate identical or functionally similar elements. Additionally, generally, the leftmost digit of a reference numeral identifies the drawing in which the reference numeral first appears. DETAILED DESCRIPTION

[0021] Figure 1 An example system for implementing a mechanism for DMRS bundling between a user equipment (UE) and a non-terrestrial network according to some aspects of the present disclosure is illustrated. The example system 100 is provided for illustrative purposes only and is not intended to limit the disclosed aspects. The system 100 may include, but is not limited to, network nodes (base stations, which are, for example, satellites) 101 and 103 and an electronic device (e.g., UE) 105. The electronic device 105 (hereinafter referred to as UE 105) may include an electronic device configured to operate based on a variety of wireless communication technologies. These technologies may include, but are not limited to, technologies based on the third generation partnership project (3GPP) standard. For example, the UE 105 may be configured to operate using the 3GPP standard. The UE 105 may include, but is not limited to, a wireless communication device, a smart phone, a laptop, a desktop computer, a tablet computer, a personal assistant, a monitor, a television, a wearable device, an Internet of Things (IoT), a vehicle communication device, etc. The network node 101 (referred to herein as a base station) may include a node configured to operate based on a variety of wireless communication technologies (such as, but not limited to, technologies based on the 3GPP standard).

[0022] According to some aspects, UE 105 and satellites 101 and 103 are configured for radio link monitoring. According to some aspects, UE 105 can be connected to satellite 101 (eg, a serving cell) and can communicate with the satellite using carrier 107, from which UE 105 receives a plurality of downlink signals.

[0023] According to some aspects, UE 105 may measure one or more carriers (e.g., carrier 107) used for communication with satellite 101 (e.g., serving cell) to perform radio link monitoring. UE 105 may measure one or more carriers (e.g., carrier 109) used for communication with satellite 103 (e.g., neighboring cell) to perform radio link monitoring. UE 105 may measure one or more carriers (e.g., carrier 111) used for communication with ground base station 113 (e.g., nearby ground cell) to perform radio link monitoring.

[0024] Figure 2 A block diagram of an example system 200 of an electronic device implementing a mechanism for DMRS bundling for communication according to some aspects of the present disclosure is illustrated. System 200 can be any electronic device of system 100 (e.g., satellite 101, 103, UE 105). System 200 includes a processor 210, one or more transceivers 220a to 220n, a communication infrastructure 240, a memory 250, an operating system 252, an application 254, and an antenna 260. The illustrated system is provided as an exemplary portion of system 200, and system 200 may include other circuits and subsystems. In addition, although the system of system 200 is illustrated as separate components, aspects of the present disclosure may include any combination of these components, fewer components, or more components.

[0025] The memory 250 may include random access memory (RAM) and / or cache, and may include control logic (e.g., computer software) and / or data. The memory 250 may include other storage devices or memories, such as, but not limited to, a hard drive and / or a removable storage device / unit. According to some examples, an operating system 252 may be stored in the memory 250. The operating system 252 may manage data transfer from the memory 250 and / or one or more applications 254 to the processor 210 and / or one or more transceivers 220a to 220n. In some examples, the operating system 252 maintains one or more network protocol stacks (e.g., an Internet protocol stack, a cellular protocol stack, etc.) that may include multiple logical layers. At the corresponding layer of the protocol stack, the operating system 252 includes a control mechanism and a data structure to perform the functions associated with the layer.

[0026] According to some examples, applications 254 may be stored in memory 250. Applications 254 may include applications (e.g., user applications) used by wireless system 200 and / or a user of wireless system 200. Applications in applications 254 may include applications such as, but not limited to, radio streaming, video streaming, remote control, and / or other user applications.

[0027] The system 200 may also include a communication infrastructure 240. The communication infrastructure 240 provides, for example, communication between the processor 210, one or more transceivers 220a-220n, and the memory 250. In some implementations, the communication infrastructure 240 may be a bus.

[0028] Processor 210 executes together with instructions stored in memory 250 to enable operation of system 200 of system 100 to implement the mechanisms for radio link monitoring as described herein.

[0029] One or more transceivers 220a-220n transmit and receive communication signals supporting mechanisms for performing time and / or frequency tracking based on those TRS configurations according to some aspects, and may be coupled to antenna 260. Antenna 260 may include one or more antennas that may be the same or different types. One or more transceivers 220a to 220n allow system 200 to communicate with other devices that may be wired and / or wireless. In some examples, one or more transceivers 220a to 220n may include processors, controllers, radio components, sockets, plugs, buffers, and similar circuits / devices for connecting to a network and communicating on the network. According to some examples, one or more transceivers 220a to 220n may include one or more circuits for connecting to and communicating on a wired network and / or a wireless network.

[0030] According to some aspects, one or more transceivers 220a-220n may include a satellite subsystem, a cellular subsystem, a WLAN subsystem, and / or a Bluetooth subsystem. TM Subsystems, each of which includes its own radio transceiver and protocol, as will be understood by those skilled in the art based on the discussion provided herein. In some implementations, one or more of the transceivers 220a to 220n may include more or fewer systems for communicating with other devices. The term "satellite" as used herein includes different types of satellites, such as GEO (geostationary orbit) satellites and LEO (low earth orbit) satellites.

[0031] In some examples, one or more transceivers 220a to 220n may include one or more circuits (including a WLAN transceiver) for enabling connection and communication via a WLAN network (such as, but not limited to, a network based on the standards described in IEEE 802.11). Additionally or alternatively, one or more transceivers 220a-220n may include a Bluetooth-based wireless communication interface. TM Protocol, Bluetooth TM Low power protocol or Bluetooth TM One or more circuits for connection and communication with low-power long-range protocols (including Bluetooth TMFor example, the transceiver 220n may include a Bluetooth TM Transceiver.

[0032] Additionally, one or more transceivers 220a to 220n may include one or more circuits (including cellular transceivers) for connecting to and communicating on a cellular network. Cellular networks may include, but are not limited to, 3G / 4G / 5G networks such as Universal Mobile Telecommunications System (UMTS), Long Term Evolution (LTE), etc. For example, one or more transceivers 220a to 220n may be configured to operate in accordance with one or more of Rel-15, Rel-16, Rel-17, or other 3GPP standards.

[0033] In addition, one or more transceivers 220a-220n may include one or more circuits for connecting to and communicating with a satellite network. Such satellite networks may include, but are not limited to, wireless communication networks, such as 3G / 4G / 5G networks, such as Universal Mobile Telecommunications System (UMTS), Long Term Evolution (LTE), and specific satellite communication network protocols for gateway functionality and control functionality from satellite ground stations. For example, one or more transceivers 220a to 220n may be configured to operate according to one or more standards in Rel-15, Rel-16, Rel-17 or other 3GPP standards. In addition, for LEO earth-fixed type satellites (see below), an additional capability is provided to direct the beam to a fixed point on the earth's surface by beamforming or by mechanically steerable beam methods.

[0034] According to some aspects, processor 210 alone or in combination with computer instructions stored in memory 250 and / or one or more transceivers 220a-220n implements radio link monitoring as discussed herein. For example, transceiver 220a may provide a first carrier (e.g., Figure 1 In this example, transceiver 220a and / or transceiver 220b may enable signaling (eg, Figure 1 109). Additionally or alternatively, the wireless system 200 may include a transceiver configured to operate on different carriers. According to some examples, the processor 210 may be configured to control a transceiver to switch between different carriers. Although the operations discussed herein are discussed with respect to the processor 210, it is noted that the processor 210 may implement these operations alone or in combination with computer instructions stored in the memory 250 and / or one or more transceivers 220a to 220n.

[0035] Overview of Demodulation Reference Signal (DMRS) Methods in Non-Terrestrial Networks

[0036] In the continued development of wireless systems, there is a continuing need to expand wireless communication capabilities in order to extend the coverage of such capabilities and increase data rates. In view of these needs, satellite networks can be used to supplement terrestrial networks (such as LTE and NR networks) to provide connectivity to remote areas and those areas that lack high data rate services. These services and connectivity include backhaul, transport, outdoor services, and IoT. In adding these additional capabilities, the demodulation reference signal (DRMS) of the connection between the UE and the satellite so that the service is seamless and meets the performance expectations of such services faces unique challenges.

[0037] In some aspects, when performing joint channel estimation, there are a number of applicable restrictions, including: (a) the modulation order does not change; (b) the resource block (RB) RB allocation does not change in length and frequency location; (c) the transmit power does not change, and (d) phase continuity between transmissions is maintained. Various use cases for joint channel estimation may be considered, including the following: (a) back-to-back PUSCH within one slot (PUSCH repetition type B), (b) back-to-back PUSCH across consecutive slots (PUSCH repetition type A / B, transport block over multiple slots (TBoMS)), and (c) non-back-to-back PUSCH across consecutive slots when there are no other UL transmissions in the middle of the PUSCH / PUCCH transmission (PUSCH repetition type A / B, TBoMS).

[0038] In terms of the time domain window (TDW) considerations for joint channel estimation, the following assumptions apply: (a) the UE is expected to maintain power consistency and phase continuity within the TDW; (b) the maximum duration is set by the UE capabilities; and (c) for a configured time domain window, the maximum value of the window length L for the configured TDW (if configured) should not exceed the maximum duration. If L is not configured, the default value of L is the minimum of the following: the maximum duration, and the duration set of all PUSCH repetitions.

[0039] Figure 3 Joint channel estimation using DMRS bundling according to aspects of the present disclosure is illustrated, and an exemplary time domain window (TDW) of a time slot is illustrated. Four consecutive time slots are illustrated, namely time slot 0 (310), time slot 1 (320), time slot 2 (330), and time slot 3 (340). Within each of these time slots, DRMS ​​signals are transmitted in symbols 2, 5, 8, and 11. The DRMS ​​signals from time slot 0 (310) and time slot 1 (320) are provided to a joint channel estimator 350, while the DRMS ​​signals from time slot 2 (330) and time slot 3 (340) are provided to a joint channel estimator 360.

[0040] In terms of actual TDW, within a configured TDW, one or more actual TDWs may be implicitly determined. Note that if power consistency and phase continuity are violated due to certain events, the creation of a new actual TDW is subject to the UE's ability to support the restart of DMRS bundling. Such events that violate the requirements of power consistency and phase continuity include the following: (a) discarding and / or elimination based on conflict rules set forth in the 3GPP specifications; (b) DL time slots or DL ​​reception / monitoring based on semi-static DL / UL configuration for unpaired spectrum; (c) a gap between two PUSCH / PUCCH transmissions exceeding thirteen (13) symbols; (d) for non-back-to-back PUSCH / PUCCH across consecutive time slots, another uplink transmission is in the middle of two PUSCH / PUCCH transmissions; (e) the action of transmit power control (TPC) commands; and (f) UL beam switching for multi-TRP operation, if DMRS bundling and UL beam switching are configured simultaneously.

[0041] The TDW used for counting may be based on physical time slots or based on configured available time slots. Figure 4A Physical time slot based TDW counting according to aspects of the present disclosure is illustrated. Figure 4A A continuous sequence of time slots 410 with continuous repetition of 12 time slots 420 is illustrated. Within the time slots 420, each time slot is represented by how each symbol within each time slot is used. The designation "U" indicates that the symbol is used for uplink, the designation "D" indicates that the symbol is used for downlink within that particular time slot, and the designation "S" indicates that the symbol can be used as either uplink or downlink. Figure 4A , there are two time domain windows TDW1 and TDW2 in time slot 420, each of which includes six time slots. For illustrative purposes only, in this illustration, six time slots are the maximum duration. Figure 4A In FIG. 1 , the slot utilization sequence generates three actual time domain windows (ATDW). The three ATDWs (counting from left to right) are slot 0, slots 2-5, and 8-10. This is the result of switching from uplink utilization to downlink utilization, which terminates the ATDW.

[0042] Figure 4B 4 illustrates a sequence of consecutive time slots 430 (with the sequence of consecutive time slots from Figure 4A The same sequence as the time slot sequence 410). Figure 4B The available time slot repetition is 12, which is the number of time slots with symbols available for uplink transmission. Figure 4B, there are three time domain windows TDW1, TDW2 and TDW3. An actual time domain window (ATDW) is shown, where each of the first three ATDWs terminates when a time slot for downlink purposes is reached. The final ATDW terminates based on the end of TDW2.

[0043] Note that the UE should not perform timing advance (TA) adjustments during the TDW. If the UE is configured to accumulate TPC commands, the TPC commands take effect after the current configured TDW. If the UE is not configured to accumulate TPC commands, the last TPC command takes effect in the configured TDW, and all previous effective TPC commands are replaced with the configured TDW. In other words, the UE applies only the last TPC command after the current configured TDW.

[0044] Based on the above, the technical challenge is how to enhance the DMRS bundling of PUSCH or PUCCH in non-terrestrial networks. Typically, the timing advance (TA) needs to be fixed in the DMRS bundling of PUSCH or PUCCH. However, in non-terrestrial networks, the position of the satellite changes very quickly. Therefore, TA needs to be constantly changing. Two solutions are described to meet the above challenges: (a) dynamic indication of the DMRS bundling size, and (b) semi-static indication of the DMRS bundling size.

[0045] Dynamic indication of demodulation reference signal (DMRS)

[0046] Turning to the first solution (dynamic indication of DMRS bundling size), aspects of the method are as follows. The steps are described from both the network side and the UE side. The network indicates the maximum allowed TA change (TA) for DMRS bundling. thres ). Note that for the purpose of joint channel estimation, the network assumes that TA does not change for several consecutive time slots. However, as mentioned above, in non-terrestrial network scenarios, the actual TA is constantly changing due to the rapid motion of the satellite. If TA is greater than the required timing error (Te), the uplink synchronization is interrupted. The network determines TA for uplink synchronization purposes thres TA thres The unit of TA can be expressed in the number of time slots or in absolute time (e.g., milliseconds). thres Can be smaller than Te (required timing error).

[0047] In order to achieve dynamic indication of DMRS bundling size, the network signals the TA thresThere are several alternatives for this signaling. In a first alternative, the indication may be provided via system information block 1 (SIB1), SIB19, or a new NTN specific SIB. In another alternative, the indication may be provided via a dedicated radio resource control (RRC) message. In another alternative, the indication may be provided via a medium access control (MAC) control element (CE). In yet another alternative, the indication may be provided via a downlink control information (DCI) signal.

[0048] Figure 5A and Figure 5B The first solution according to various aspects of the present disclosure, namely the dynamic indication of the DMRS bundling size, is illustrated, wherein Figure 5A This illustrates a solution from the network side, while Figure 5B The solution from the UE side is illustrated. Figure 5A , in step 1 (505), the network determines the maximum allowed TA change for DMRS bundling. The maximum allowed TA change may depend on the elevation angle of the service beam relative to the satellite. The maximum allowed TA change may depend on the speed of the satellite motion related to the satellite orbit. In step 2 (510), the network receives a UE capability report on the time domain window (TDW) duration. In step 3 (515), the network schedules a configuration authorized PUSCH for the UE based on the capabilities reported by the UE, which indicates the DMRS bundling (TDW) size. For example, the UE reports its capability for the maximum duration of DMRS bundling, which means the maximum number of time slots in which the UE can maintain power consistency and phase continuity. The DMRS bundling (TDW) size in the authorized PUSCH scheduled by the network should not exceed the maximum duration for DMRS bundling reported by the UE. In step 4 (520), the network receives the actual TDW size for PUSCH DMRS bundling indicated by the UE. In step 5 (525), the network performs joint channel estimation based on the TDW for PUSCH DMRS bundling indicated by the UE.

[0049] refer to Figure 5B , in step 1 (555), the UE receives the maximum allowed TA change for DMRS bundling. In step 2 (560), the UE reports its capability report regarding the time domain window (TDW) duration. In step 3 (565), the UE receives a configuration grant PUSCH, which indicates the DMRS bundling (TDW) size. In step 4 (570), the UE determines the actual TDW size for PUSCH DMRS bundling based on its estimated TA change compared to the maximum allowed TA change. Generally speaking, the UE calculates / estimates the TA value for each time slot for PUSCH repetition. If the difference between the TA value of the first time slot and the TA value of the Xth time slot is greater than the TA thres, but the difference between the TA value of the first time slot and the TA value of the (X-1)th time slot is less than TA thres , then the actual TDW size is equal to X. In step 5 (575), the UE reports its actual TDW size for PUSCH DMRS bundling, and uses PUSCH to transmit its indicated DMRS bundling size.

[0050] As described in step 4 (520) above, the network receives from the UE an actual TDW size indicated by the UE for PUSCH DMRS bundling. The actual TDW size for PUSCH DMRS bundling can be expressed in units of the number of time slots, or can be expressed in absolute time (e.g., milliseconds). The signaling of the UE indication of the actual TDW size can be accomplished using many various alternatives. In a first alternative, the indication may be provided via an uplink control information (UCI) signal associated with the configuration grant PUSCH. In a second alternative, the indication may be provided via the UCI before the configuration grant. In another alternative, the indication may be provided using a MAC CE before the configuration grant. In yet another alternative, the indication may be provided by a dedicated RRC message before the configuration grant.

[0051] In step 4 (570), the UE determines the actual TDW size for PUSCH DMRS bundling based on its estimated TA change compared to the maximum allowed TA change. Relevant here is the TA calculation formula, which is T TA =(N TA +N TA,UE特定 +N TA，公共 +N TA，偏移 )*Tc, where N TA For PRACH, it is defined as 0 and is updated based on the TA command field in Msg2 / MsgB and the MAC CETA command. TA,UE特定 is the TA estimated by the UE to pre-compensate the service link delay, N TA，公共 is a common TA controlled by the network and may include any timing offsets deemed necessary by the network. TA，偏移 Is a fixed offset used to calculate the timing advance. Based on the TA calculation formula, the UE determines the TA value for each of the consecutive time slots used for PUSCH transmission. The TA calculation is based on both open-loop TA control and closed-loop TA control. The UE compares the TA value with the maximum allowed TA change indicated by the network. The UE determines the maximum number of time slots with a TA change within the maximum allowed TA change.

[0052] In step 5, the UE reports its actual TDW size for PUSCH DMRS bundling and transmits a PUSCH signal with its indicated DMRS bundling size. There are three alternatives. In the first alternative, DMRS bundling may continue after the segmented uplink time slot. For this first alternative, two options are possible. The first option is to additionally indicate the next actual TDW size for subsequent PUSCH DMRS bundling. In the second option, the same actual TDW size is applied to subsequent PUSCH DMRS bundling. Fig. 6A This alternative is illustrated, where TA i-1 The difference with TA0 is less than TA thres (threshold), and TA i The difference from TA0 is greater than TA thres . Therefore, the actual TDW size is equal to i.

[0053] In the second alternative, DMRS bundling is stopped after the segmented uplink time slot. Therefore, all subsequent time slots in PUSCH do not apply DMRS bundling. In the third alternative, the UE stops PUSCH transmission after the actual TDW size. In this alternative, the UE does not report its actual TDW size because it implicitly indicates the actual TDW size. Figure 6B This alternative is illustrated, where TA i-1 The difference with TA0 is less than TA thres (threshold), and TA i The difference from TA0 is greater than TA thres . Therefore, the actual TDW size is equal to i.

[0054] In some scenarios, it is noted that an additional gap may be added between two actual TDW transmissions to account for TA adjustments. The additional gap may be in units of samples, symbols, or slots. A gap may also be counted as part of a later slot, i.e., the later slot will be affected by the size of the gap.

[0055] Semi-static indication of demodulation reference signal (DMRS)

[0056] Turning to the second solution (semi-static indication of DMRS bundling size), aspects of this method for joint channel estimation of PUSCH in non-terrestrial networks are as follows. This applies equally to both PUSCH and PUCCH, and a description is provided for both the network side and the UE side.

[0057] Fig. 7A and Figure 7B The second solution according to aspects of the present disclosure, namely the semi-static indication of the DMRS bundling size, is illustrated, wherein Fig. 7A This illustrates a solution from the network side, while Figure 7BThe solution from the UE side is illustrated. Fig. 7A In step 1 (705), the network indicates the uplink segment transmission duration. In step 2 (710), the network receives a UE capability report regarding the maximum time domain window (TDW) duration. In step 3 (715), the network schedules a grant PUSCH for the UE based on the capabilities reported by the UE and the uplink segment transmission duration, which indicates the DMRS bundling (TDW) size. In step 4 (720), the network performs joint channel estimation based on the TDW indicated by the UE for PUSCH DMRS bundling.

[0058] refer to Figure 7B In step 1 (755), the UE receives the uplink segment duration for DMRS bundling. In step 2 (760), the UE reports its capability report on the maximum time domain window (TDW) duration. In step 3 (765), the UE receives a configuration grant PUSCH indicating the DMRS bundling size. In step 4 (770), the UE transmits on the configuration grant PUSCH based on the indicated PUSCH DMRS bundling size.

[0059] As described above, in step 1 (705), the network indicates the uplink segment transmission duration. Here, it is assumed that the TA and frequency offset remain the same for the uplink segment transmission. The uplink segment transmission duration may depend on the elevation angle between the satellite and the UE. For large elevation angles, the uplink segment transmission is smaller because the TA changes less. For small elevation angles, the uplink segment transmission is larger because the TA changes more. It is possible to indicate multiple uplink segment transmission durations, where the duration used depends on the elevation angle of the UE. The elevation angle may be notified by the UE to the network. The uplink segment transmission duration may depend on the K 偏移 Value, where K 偏移 The value K is an offset value known by both the network and the UE. This value is used to determine the uplink transmission time slot. It is usually larger than TA (timing advance) so that the uplink transmission scheduling is causal. 偏移 The value can be cell-specific K 偏移 value or UE-specific K 偏移 For larger K 偏移 The uplink segment transmission duration is longer. 偏移 The smaller the value, the smaller the uplink segment transmission duration. It is possible to indicate multiple uplink segment transmission durations, where the use of the duration depends on K 偏移 Value angle.

[0060] The signaling of the uplink segment transmission duration may be performed using one or more of the following alternatives. In a first alternative, the indication may be performed via system information block 1 (SIB1), SIB19, or a new NTN-specific SIB. In another alternative, the indication may be provided via a dedicated radio resource control (RRC) message. In another alternative, the indication may be provided via a medium access control (MAC) control element (CE). In yet another alternative, the indication may be provided via a downlink control information (DCI) signal. It should be noted that the signaling of the uplink segment transmission duration may be part of the configuration for PUSCH DMRS bundling (i.e., it may be signaled as part of DMRS-BundlingPUSCH-Config), or it may be configured independently of USCH DMRS bundling. The unit of the uplink segment transmission duration may be a time slot.

[0061] In this second solution, step 1 and step 2 can be swapped. After receiving the reported maximum duration, the base station (e.g., gNB) determines the size of the segment to ensure that the TA will not change within the TDW.

[0062] In step 3 (715), the network schedules a configuration grant PUSCH for the UE, which indicates the DMRS bundling size. The size is based on the UE capability and the uplink segment transmission duration. The method can also be extended to dynamically grant PUSCH, with at least two options. In the first option, the minimum of the DMRS bundling size reported by the UE and the uplink segment transmission duration is taken as the dedicated DMRS bundling size value for the UE. In the second option, if TDW is configured, the TDW size is additionally upper bounded by the uplink segment transmission duration. If TDW is not configured, the TDW size is equal to the minimum of the following: (a) the maximum duration reported by the UE for the DMRS bundling size; (b) the PUSCH repetition size; (c) the frequency hopping interval used for PUSCH repetition; and (d) the uplink segment transmission duration. There are two alternatives for the indication of the DMRS bundling size. In a first alternative, a new information element (IE) is designed: "DMRS-BundlingPUSCH-Config_NTN", which has a different time domain window length from the legacy IE "DMRS-BundlingPUSCH-Config-r17". In another alternative, a new element "pusch-TimeDomainWindowLength-NTN" is added to the existing IE of "DMRS-BundlingPUSCH-Config-r17", and its value is not greater than the DMRS bundling size and uplink segment transmission duration reported by the UE.

[0063] In signaling, a segment is equal to or less than the maximum duration reported by the UE. The size of a segment is the same as the TDW. The TA command is applied to the first transmission of a segment and the same TA is maintained within the timeslot of the segment. A new TA is applied to the next segment.

[0064] Figure 8 Timing advance in the context of aspects of the present disclosure is illustrated. Segment 1 uses timing advice TA0, while segment 2 uses timing advice TA1.

[0065] Exemplary Computer System

[0066] For example, one or more computer systems (such as Fig. 9 The computer system 900 shown in the figure can be used to implement various aspects. The computer system 900 can be any well-known computer capable of performing the functions described herein, such as Figure 1 Device 101, 103, 105, or Figure 2 Device 200. The computer system 900 includes one or more processors (also referred to as central processing units or CPUs), such as a processor 904. The processor 904 is connected to a communication infrastructure 906 (e.g., a bus). The computer system 900 also includes user input / output devices 903, such as a monitor, keyboard, pointing device, etc., that communicate with the communication infrastructure 906 through a user input / output interface 902. The computer system 900 also includes a main memory or primary storage 908, such as a random access memory (RAM). The main memory 908 may include one or more levels of cache. The main memory 908 has control logic (e.g., computer software) and / or data stored therein.

[0067] The computer system 900 may also include one or more secondary storage devices or memories 910. The secondary storage 910 may include, for example, a hard disk drive 912 and / or a removable storage device or drive 914. The removable storage drive 914 may be a floppy disk drive, a tape drive, an optical drive, an optical storage device, a tape backup device, and / or any other storage device / drive.

[0068] The removable storage drive 914 may interact with a removable storage unit 918. The removable storage unit 918 includes a computer usable or readable storage device having computer software (control logic) and / or data stored thereon. The removable storage unit 918 may be a floppy disk, a magnetic tape, an optical disk, a DVD, an optical storage disk, and / or any other computer data storage device. The removable storage drive 914 reads from and / or writes to the removable storage unit 918 in a well-known manner.

[0069] According to some aspects, secondary memory 910 may include other devices, means, or other methods for allowing computer programs and / or other instructions and / or data to be accessed by computer system 900. Such devices, means, or other methods may include, for example, a removable storage unit 922 and an interface 920. Examples of removable storage unit 922 and interface 920 may include a program cartridge and cartridge interface (such as those found in video game devices), a removable memory chip (such as an EPROM or PROM) and associated socket, a memory stick and USB port, a memory card and associated memory card slot, and / or any other removable storage unit and associated interface.

[0070] The computer system 900 may also include a communication or network interface 924. The communication interface 924 enables the computer system 900 to communicate and interact with any combination of remote devices, remote networks, remote entities, etc. (individually and collectively referenced by reference numeral 928). For example, the communication interface 924 may allow the computer system 900 to communicate with a remote device 928 via a communication path 926, which may be wired and / or wireless and may include any combination of a LAN, a WAN, the Internet, etc. Control logic components and / or data may be transmitted to and from the computer system 900 via the communication path 926.

[0071] The operations in the foregoing aspects can be implemented in various configurations and architectures. Thus, some or all of the operations in the foregoing aspects can be performed in hardware, software, or in both hardware and software. In some aspects, a tangible, non-transient device or article includes a tangible, non-transient computer-usable or readable medium on which a control logic component (software) is stored, also referred to herein as a computer program product or program storage device. This includes, but is not limited to, a computer system 900, a main memory 908, an auxiliary memory 910, and removable storage units 918 and 922, as well as tangible articles embodying any combination of the foregoing. When executed by one or more data processing devices (such as computer system 900), such control logic components cause such data processing devices to operate as described herein.

[0072] Based on the teachings contained in this disclosure, it will be apparent to those skilled in the relevant art how to use the Fig. 9 The various aspects of the present disclosure may be made and used with data processing devices, computer systems, and / or computer architectures other than those shown. In particular, the various aspects may operate with software, hardware, and / or operating system implementations other than those described herein.

[0073] It should be understood that the Detailed Description section, rather than the Summary and Abstract sections, is intended to be used to interpret the claims. The Summary and Abstract sections may set forth one or more but not all exemplary aspects of the present disclosure as contemplated by the inventors, and thus are not intended to limit the present disclosure or the appended claims in any way.

[0074] Although the present disclosure has been described herein with reference to exemplary aspects of exemplary fields and applications, it should be understood that the present disclosure is not limited thereto. Other aspects and modifications are possible and are within the scope and essence of the present disclosure. For example, and without limiting the generality of this paragraph, the various aspects are not limited to the software, hardware, firmware, and / or entities illustrated in the figures and / or described herein. In addition, the various aspects (whether or not explicitly described herein) have significant practicality for fields and applications beyond the examples described herein.

[0075] Various aspects have been described herein by means of functional building blocks that illustrate the specific implementation of specific functions and their relationships. For ease of description, the boundaries of these functional building blocks have been arbitrarily defined herein. As long as the specified functions and relationships (or their equivalents) are properly performed, alternative boundaries may be defined. In addition, alternative aspects may use an order different from the order described herein to perform functional blocks, steps, operations, methods, etc.

[0076] References herein to "an aspect," "aspects," "exemplary aspects," or similar phrases indicate that the described aspects may include particular features, structures, or characteristics, but each aspect may not necessarily include the particular features, structures, or characteristics. Furthermore, such wordings do not necessarily refer to the same aspect. Furthermore, when particular features, structures, or characteristics are described in conjunction with an aspect, it is within the knowledge of those skilled in the relevant art to incorporate these features, structures, or characteristics into other aspects, whether or not explicitly mentioned or described herein. The breadth and scope of the present disclosure should not be limited by any of the above-described exemplary aspects, but should be limited only in accordance with the following claims and their equivalents.

[0077] As described above, various aspects of the present technology may include collecting and using data available from various sources, thereby (for example) improving or enhancing functionality. The present disclosure contemplates that, in some instances, these collected data may include personal information data that uniquely identifies or can be used to contact or locate a specific person. Such personal information data may include demographic data, location-based data, phone numbers, email addresses, Twitter IDs, home addresses, data or records related to the user's health or fitness level (e.g., vital sign measurements, medication information, exercise information), date of birth, or any other identifying information or personal information. The present disclosure recognizes that the use of such personal information data in the present technology can be used to benefit users.

[0078] The disclosure anticipates that entities responsible for the collection, analysis, disclosure, transmission, storage or other purposes of such personal information data will comply with sound privacy policies and / or privacy measures. Specifically, such entities should implement and adhere to the use of privacy policies and measures that are recognized as meeting or exceeding the industry or government requirements for maintaining the privacy and security of personal information data. Such policies should be easy for users to access and should be updated as changes in the collection and / or use of data are made. Personal information from users should be collected for legal and reasonable entity purposes and should not be shared or sold outside these legal purposes. In addition, such collection / sharing should only be after receiving the user's informed consent. Additionally, such entities should consider taking any necessary steps to protect and safeguard access to such personal information data, and ensure that other entities with access to personal information data comply with the privacy policies and procedures of other entities. In addition, such entities can subject themselves to third-party assessments to prove that they comply with widely accepted privacy policies and privacy practices. In addition, policies and practices should be adapted to specific types of personal information data collected and / or accessed, and to applicable laws and standards including considerations of special jurisdictions. For example, in the United States, the collection or acquisition of certain health data may be governed by federal and / or state laws, such as the Health Insurance Portability and Accountability Act (HIPAA); while health data in other countries may be subject to other regulations and policies and should be handled accordingly. Therefore, different privacy measures should be advocated for different types of personal data in each country.

[0079] Regardless of the foregoing, the present disclosure also contemplates that users selectively block aspects of the use or access to personal information data. That is, the present disclosure contemplates that hardware elements and / or software elements may be provided to hinder or block access to such personal information data. For example, the present technology may be configured to allow users to selectively participate in "opt-in" or "opt-out" of collecting personal information data at any time during or after (for example) registration for a service. In addition to providing "opt-in" and "opt-out" options, the present disclosure also contemplates providing notifications related to access or use of personal information. For example, a user may be notified that their personal information data will be accessed when downloading an application, and then reminded again just before the personal information data is accessed by the application.

[0080] In addition, it is the intention of the present disclosure that personal information data should be managed and processed in a manner that minimizes the risk of unintentional or unauthorized access or use. Once the data is no longer needed, the risk can be minimized by limiting the collection of data and deleting the data. In addition, and when applicable, including in certain health-related applications, data de-identification can be used to protect the privacy of users. De-identification can be facilitated by removing specific identifiers (e.g., date of birth, etc.), controlling the amount or specificity of stored data (e.g., collecting location data at the city level rather than at the address level), controlling how the data is stored (e.g., aggregating data between users), and / or other methods when appropriate.

[0081] Thus, while the present disclosure may broadly cover the use of personal information data to implement one or more of the various disclosed aspects, the present disclosure also contemplates that various aspects may be implemented without access to such personal information data. That is, various aspects of the present technology will not fail to function properly due to the lack of all or part of such personal information data.

Claims

1. A method for providing a dynamic indication of a demodulation reference signal (DMRS) bundling size in a wireless communication network having a satellite by a user equipment (UE), the method comprising: receiving a maximum allowed timing advance (TA) change for DMRS bundling from the wireless communication network; reporting a time domain window (TDW) duration capability to the wireless communication network; receiving a configuration grant for a PUSCH channel from the wireless communication network, the configuration grant indicating the DMRS bundling size; determining an actual TDW size for physical uplink shared channel (PUSCH) DMRS bundling based on an estimated TA change compared to the maximum allowed TA change; and The actual TDW size for PUSCH DMRS bundling is reported to the wireless communication network using the PUSCH channel.

2. The method of claim 1, wherein the receiving the maximum allowed TA comprises receiving an indication of the maximum allowed TA change via system information block 1 (SIB1), SIB19, or an NTN-specific SIB.

3. The method of claim 1 , wherein the receiving the maximum allowed TA change comprises receiving an indication of the maximum allowed TA change via a dedicated radio resource control (RRC) message, a medium access control (MAC) control element (CE), or a downlink control information (DCI) signal.

4. The method of claim 1 , wherein the reporting the actual TDW size comprises reporting an indication of the actual TDW size via an uplink control information (UCI) signal associated with a configuration grant PUSCH, a UCI prior to a configuration grant, a MAC CE prior to the configuration grant, or a dedicated RRC message prior to the configuration grant.

5. The method of claim 1, wherein the DMRS bundling continues after a segmented uplink timeslot, wherein a next actual TDW size for subsequent PUSCH DMRS bundling is indicated.

6. The method of claim 1, wherein the DMRS bundling continues after a segmented uplink timeslot, wherein the same actual TDW size is applied to the subsequent PUSCH DMRS bundling.

7. The method of claim 1, wherein the DMRS bundling stops after a segmented uplink timeslot, or wherein the DMRS bundling stops after an actual TDW size.

8. The method of claim 1, further comprising adding a gap between two actual TDW transmissions to account for TA adjustment, the gap being indicated in units of samples, symbols, or slots.

9. The method of claim 1, further comprising adding a gap between two actual TDW transmissions to account for TA adjustment, wherein the gap is counted as part of a later time slot.

10. The method according to claim 1, further comprising: determining an actual TDW size for physical uplink control channel (PUCCH) DMRS bundling based on an estimated TA change compared to the maximum allowed TA change; as well as The actual TDW size for PUCCH DMRS bundling is reported to the wireless communication network using the PUCCH channel.

11. A method for providing a dynamic indication of a demodulation reference signal (DMRS) bundling size to a user equipment (UE) by a wireless communication network having a satellite, the method comprising: determining, by the wireless communication network, a maximum allowed timing advance (TA) change for DMRS bundling; receiving, by the wireless communication network, a time domain window (TDW) duration capability from the UE; scheduling, by the wireless communication network, a configuration grant for a physical uplink shared channel (PUSCH) channel for the UE, the configuration grant indicating the DMRS bundling size, and the DMRS bundling size being based on the TDW duration capability of the UE; receiving, from the UE, an actual TDW size for PUSCH DMRS bundling; and Joint channel estimation is performed based on the actual TDW size for PUSCH DMRS bundling.

12. A user equipment (UE), the user equipment (UE) comprising: A radio frequency (RF) transceiver configured to: receiving a maximum allowed timing advance (TA) change for DMRS bundling from the wireless communication network; transmitting a time domain window (TDW) duration capability to the wireless communication network; receiving a configuration grant for a physical uplink shared channel (PUSCH) from the wireless communication network, the configuration grant indicating the DMRS bundling size; a processing circuit coupled to the RF transceiver, the processing circuit being configured to: determining an actual TDW size for PUSCH DMRS bundling based on an estimated TA change compared to the maximum allowed TA change; and The radio frequency (RF) transceiver is further configured to report the actual TDW size for PUSCH DMRS bundling to the wireless communication network via the antenna using the PUSCH channel.

13. A method by a user equipment (UE) for providing a semi-static indication of a demodulation reference signal (DMRS) bundling size in a wireless communication network having a satellite, the method comprising: receiving, from the wireless communication network, an uplink segment transmission duration for DMRS bundling; reporting a time domain window (TDW) duration capability to the wireless communication network; receiving a configuration grant for a physical uplink shared channel (PUSCH) from the wireless communication network, the configuration grant indicating the DMRS bundling size; as well as The configuration grant regarding the PUSCH channel is transmitted using the indicated PUSCH DMRS bundling.

14. The method of claim 13, wherein the receiving the uplink segment transmission duration comprises receiving an indication of the maximum uplink segment transmission duration via system information block 1 (SIB1), SIB19, or an NTN-specific SIB.

15. The method of claim 13, wherein the receiving the uplink segment transmission duration comprises receiving an indication of the maximum uplink segment transmission duration via a dedicated radio resource control (RRC) message.

16. The method of claim 13, wherein the receiving the uplink segment transmission duration comprises receiving an indication of the maximum uplink segment transmission duration via a medium access control (MAC) control element (CE).

17. A method according to claim 13, wherein the receiving the uplink segment transmission duration includes receiving an indication of the maximum uplink segment transmission duration via a downlink control information (DCI) signal, wherein the indication is part of a PUSCH DMRS bundling configuration, or the indication is configured independently of the PUSCH DMRS bundling configuration.

18. The method of claim 13, wherein the DMRS bundling size is a minimum of a reported DMRS bundling size and an uplink segment transmission duration.

19. The method of claim 13, wherein if the TDW is configured, the size of the TDW is additionally upper bounded by an uplink segment transmission duration, or wherein if the size of the TDW is not configured, the size of the TDW is set to be equal to the minimum of a maximum duration reported by a UE of the DMRS bundling size, a PUSCH repetition size, a hopping interval for PUSCH repetition, and the uplink segment transmission duration.

20. The method of claim 13, wherein the DMRS bundling size is reported as an information element (IE) having a different time domain window length than a previous version of the IE.

21. The method of claim 13, wherein the DMRS bundling size is reported as an IE added to an existing previous information element (IE).

22. The method of claim 13, wherein the segment is equal to or less than a reported maximum duration.

23. The method of claim 13, wherein a TA command is applied to a first transmission of a segment, wherein the same TA is applied within the time slots of the segment, and wherein a new TA is applied to the next segment.

24. A method for providing a semi-static indication of a demodulation reference signal (DMRS) bundling size to a user equipment (UE) by a wireless communication network having a satellite, the method comprising: Indicating, by the wireless communication network, an uplink segment transmission duration; receiving, by the wireless communication network, a time domain window (TDW) duration capability from the UE; scheduling, by the wireless communication network, a configuration grant for a physical uplink shared channel (PUSCH) for the UE, the configuration grant indicating the DMRS bundling size, wherein the DMRS bundling size is based on the TDW duration capability of the UE and based on the uplink segment transmission duration; as well as Joint channel estimation is performed based on the actual TDW size for PUSCH DMRS bundling.

25. A user equipment (UE), the user equipment (UE) comprising: A radio frequency (RF) transceiver configured to: receiving, from the wireless communication network, an uplink segment duration for DMRS bundling; transmitting a time domain window (TDW) duration capability to the wireless communication network; receiving a configuration grant for a physical uplink shared channel (PUSCH) from the wireless communication network, the configuration grant indicating the DMRS bundling size; as well as a processing circuit coupled to the RF transceiver, the processing circuit being configured to: The configuration grant regarding the PUSCH channel is caused to be transmitted using the indicated PUSCH DMRS bundling.

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