RU2793456C1 - Transmission resource switching - Google Patents

Abstract

FIELD: wireless communication.

SUBSTANCE: wireless communication method is provided, which comprises configuring, by a network device, a configuration message so as to enable switching of transmission resources between sets of resources; and communicating, via the network device, with the user device to perform transmission resource switching.

EFFECT: providing support for wireless communication for an increased number of users and devices.

15 cl, 13 dwg

Description

The field of technology to which the invention belongs

[0001] This patent document generally relates to systems, devices and technologies for wireless communication.

State of the art

[0002] Wireless communication technologies are moving the world towards an increasingly connected and networked society. The rapid development of wireless communications and advances in technology is driving the demand for bandwidth and connectivity. Other aspects such as power consumption, device costs, spectral efficiency and latency are also important to meet the needs of different communication scenarios. Compared to existing wireless networks, next-generation wireless systems and technologies must provide support for an increased number of users and devices.

The essence of the invention

[0003] This document relates to methods, systems, and apparatuses for transmission resource switching technologies. Some of the technologies proposed in the disclosed technology may be implemented in non-terrestrial networks. The disclosed technology describes techniques that can be implemented in multiple mobile devices (either terminals or user devices) or multiple networks (such as satellite, aircraft) and reduce signaling costs in transmission resource switching.

[0004] In one aspect, a wireless communication method is disclosed. The method includes configuring, by the network device, a configuration message so as to allow switching of transmission resources between resource sets; and communicating, via the network device, with the user device so as to perform transmission resource switching.

[0005] In another aspect, a wireless communication method is disclosed. The method includes receiving, from a network device, a configuration message including timer information that indicates a time for a user device to need to stay in a corresponding resource; and performing transmission resource switching between the resource sets based on the timer information.

[0006] In another aspect, a wireless communication method is disclosed. The method includes receiving, by a user device, from a network device, a configuration message including threshold or location information that is used to facilitate switching of transmission resources between resource sets.

[0007] In another aspect, wireless communications equipment is disclosed, comprising a processor configured to implement the disclosed methods.

[0008] In another aspect, a computer-readable medium storing code is disclosed. The code, when implemented by a processor, instructs the processor to implement the method described herein.

[0009] The above and other aspects, as well as their implementation, are described in more detail in the drawings, in the description and in the claims.

Brief description of the drawings

[0010] FIG. 1 shows an example of a base station (BS) and a user equipment (UE) in wireless communication based on some implementations of the disclosed technology.

[0011] FIG. 2 shows an example block diagram of a piece of equipment based on some implementations of the disclosed technology.

[0012] FIG. 3A and 3B show beams and cells in an NR (new radio standard) based system.

[0013] FIG. 4 shows the beams and frequency reuse scheme in an HTS (high capacity satellite) system.

[0014] FIG. 5 shows an example in mapping between beams and BWPs (parts of the frequency band) based on some implementations of the disclosed technology.

[0015] FIG. 6 shows examples of messages exchanged between a UE and a network based on some implementations of the disclosed technology.

[0016] FIG. 7 shows an example of a UE trajectory under a moving satellite based on some implementations of the disclosed technology.

[0017] FIG. 8 shows a timer range determined by a UE trajectory under a moving satellite based on some implementations of the disclosed technology.

[0018] FIG. 9 shows an example of the relationship of SSB (Sync Signal Blocks) and BWP to simplify measurement for RLM (Radio Link Monitoring).

[0019] FIG. 10-12 show examples of wireless communication schemes based on some implementations of the disclosed technology.

Detailed description of the invention

[0020] The disclosed technology provides implementations and examples of transmission resource switching technologies. In wireless communications, such as in NTN scenarios with high satellite mobility, some implementations of the proposed technologies provide the ability to switch transmission resources between sets of resources. The disclosed technology also provides various implementations for switching transmission resources, such as timer-based switching, threshold-based switching, or location information-based switching, depending on the condition under which the user equipment performs transmission resource switching.

[0021] With the development of access technologies based on the new radio standard (NR) (for example, 5G), a wide range of use cases can be realized, including advanced broadband standard for mobile devices, mass machine communication (MTC), critical MTC, etc. .d. In order to expand the use of NR access technologies, 5G connectivity mode via satellites is considered as a promising use case. Unlike terrestrial networks, in which all communication nodes (eg, base stations) are located on the Earth, a network including satellites and/or aircraft that perform some or all of the functions of terrestrial base stations is called a "non-terrestrial network (NTN)" .

[0022] In NTN, satellite coverage is generally implemented with multiple beams. The satellite beams are deployed over the coverage area with the satellite moving along its orbit. To achieve high throughput, frequency reuse among the beams is accommodated. For a fixed user equipment (UE), it is served by different beams in time. In addition, the UE must switch to another frequency of the corresponding serving beam.

[0023] The coverage of a satellite is generally much greater than that of a terrestrial cell. For example, the occupied diameter of a single satellite beam can be hundreds of kilometers or even more. With this large coverage, the number of UEs must also be large. If the network informs each UE of the change in the serving frequency, the amount of overhead to be transmitted must be high due to the very large number of UEs.

[0024] The disclosed technology provides technologies for wireless communication that can reduce the amount of transmitted overhead in NTN scenarios. The disclosed technology provides transmission resource switching technologies where the transmission resource may be a beam or a portion of a frequency band (BWP). Some implementations of the proposed method provide the ability to perform serving beam switching with lower signaling overhead, which is required for NTN scenarios with high satellite mobility.

[0025] FIG. 1 shows an example of a wireless communication system (eg, a cellular 5G or NR network) that includes a BS 120 and one or more user equipments 111, 112, and 113 (UE). In some embodiments, UEs access a BS (eg, a network) using implementations of the disclosed technology (131, 132, 133), which then provides onward communication (141, 142, 143) from the BS to the UE. The UE may, for example, be a smartphone, a tablet computer, a mobile computer, a machine-to-machine (M2M) communication device, an Internet of Things (IoT)-enabled device, and so on.

[0026] FIG. 2 shows an example of a block diagram representation of a piece of equipment. Equipment 210, such as a base station or wireless device (or UE), may include processor electronics 220, such as a microprocessor that implements one or more of the technologies presented herein. Equipment 210 may include transceiver electronics 230 to send and/or receive wireless signals over one or more communication interfaces, such as antenna 240. Equipment 210 may include other communication interfaces for transmitting and receiving data. Equipment 210 may include one or more storage devices (not shown explicitly) configured to store information such as data and/or instructions. In some implementations, processor electronics 220 may include at least a portion of transceiver electronics 230. In some embodiments, at least some of the disclosed technologies, modules, or functions are implemented using equipment 210.

[0027] The disclosed technology provides various resource switching technologies. The features and implementations proposed for switching transmission resources are explained in more detail below. Section headings are used herein only to aid understanding, and the scope of the embodiments and technologies described in each section is not limited to that section. In addition, while 5G terminology is used in some cases to make it easier to understand the disclosed technologies that may apply to wireless systems and devices that use communication protocols other than 5G or 3GPP protocols.

[0028] The types of resources used in communication systems may include the following:

[0029] (1) A spatial domain resource, such as rays. In some implementations, the beam identifiers further include beam-specific reference signals, an antenna port, a quasi-collocation configuration, a precoder.

[0030] (2) A frequency domain resource, such as a portion of available bandwidth (BWP) or carrier component (CC) in carrier aggregation.

[0031] (3) A time domain resource, such as various frames/time slots, that are used in semi-persistent scheduling.

[0032] Switching between resource sets may include the following:

[0033] (1) Switching one type of resource, for example:

[0034] - Switching from beam 1 to beam 2, which means that the UE changes its tracked beam-specific reference signal.

[0035] - Switching from BWP 1 to BWP 2, which means that the UE changes its active BWP.

[0036] (2) Switching multiple resource types, for example:

[0037] - By linking resources: In this case, different types of resources are linked together. For example, a beam is associated with the corresponding BWP, and a switch of the beam or BWP results in a switch of the beam and BWP resources. Linking can be achieved by i) including an index of the second resource type as part of the configuration parameters of the first resource type and/or ii) using additional parameters to indicate the relationship.

[0038] - By configuring resource sets: As an example, resource set A is defined to contain beam 1 and BWP 2, and resource set B provides a compromise between beam 2 and BWP 3. Switching from resource set A to set B resources results in both the beam switching and the BWP given by each set.

[0039] In NR systems, beam work is enabled due to high frequency usage. Although a beam is not specified using an explicit identifier, it can be referred to in many aspects as a synchronization signal block (SSB), link state information reference signal (CSI-RS), and so on. In NR systems, BWP enables a UE with a low bandwidth transceiver to communicate with a base station (BS) with a high bandwidth system. BWP switching can be done via RRC reconfiguration, bwp-InactivityTimer, PDCCH DCI format 0_1 or 1_1, or RACH-based failover.

[0040] FIG. 3A and 3B show beams and cells in an NR system. In NR systems, a cell may have a single beam or multiple beams, as shown in FIG. 3A and 3B. In FIG. 3A, problems associated with UE movement between beams tagged with a Physical Cell Identifier (PCI) can be solved by intra-cell beam switching that incorporates physical layer signaling. In FIG. 3B, UE movement between beams results in inter-cell handoff, which involves higher signaling costs including the physical layer and upper layers.

[0041] FIG. 4 shows beams and a frequency reuse scheme in an HTS system. In HTS systems, frequency reuse, such as the four-color reuse in FIG. 4 is a common way to improve efficiency. The relationship between rays and honeycomb is not explicitly stated. As mentioned above, the stationary UE must be served by different beams with a different frequency in time. In this case, an appropriate cell/beam/frequency relationship is required in order to reduce signaling costs in mobility management.

[0042] In terms of signaling costs in mobility management for NTN scenarios, beam switching as shown in FIG. 3A is a better choice than handover as shown in FIG. 3b. On the other hand, in order to achieve high efficiency, frequency reuse as shown in FIG. 4 may be used in an NTN deployment. In some examples, BWP mapping, beam switching, and frequency resource change occur together. This can be supported through beampacking and BWP. An exemplary four-color frequency reuse and a corresponding BWP mapping example are provided in FIG. 5.

[0043] In an NTN network, mobility due to satellite movement is generally a dominant factor. In some use cases, the movement of high speed UEs (such as aircraft) becomes another non-negligible factor. Due to the highly predictable satellite orbit and planned airpath, beam/frequency switching due to mobility can be supported in the following ways.

[0044] Timer Based Transmission Resource Switching

[0045] In an NTN system, the use of a timer such as bwp-InactivityTimer may be re-interpreted to automatically switch the transmission resource with the predicted relative movement of the UE and satellite BS. This method is applicable to stationary/low/high speed UEs, provided that the relative trajectory is predictable.

[0046] Implementation 1: Timer-Based Transmission Resource Switching

[0047] Clause 1: In some implementations, network identification information, such as a public land mobile network (PLMN) identifier, of an NTN system is set to be different from traditional terrestrial networks. For example, the UE uses the PLMN identifier to report whether its serving network is or is not an NTN system.

[0048] Item 2: If the serving network is an NTN system, the UE reports its location information to the network. Depending on the UE's moving speed, additional information regarding the UE may be provided to the network. In some implementations, if the serving network is an NTT system, the fixed/low rate UE reports its location to the network. In some implementations, if the serving network is an NTT system, the high speed UE announces its location, speed, and direction to the network. The network calculates the relative movement path of the UE. Fig. 6 shows messages transmitted between the UE and the network. As shown in FIG. 6, the network may use RRC reconfiguration to set the bwp-InactivityTimer and the list of BWP IDs in the beam switch. The details of using a configuration message such as an RRC reconfiguration message are further explained below.

[0049] (1) How to inform the UE of the configuration for timer-based transmission resource switching

[0050] Timer information may be included in a configuration message, such as an RRC reconfiguration message. For example, in an RRC reconfiguration message, a timer-related information element, eg bwp-InactivityTimer IE, is populated using a path. In some implementations, the path is: RRC-Reconfigure → CellGroupConfig → ServingCellConfig → bwp-InactivityTimerList → bwp-InactivityTimer. The timer information included in the configuration message may include one or more timers associated with respective resources. The respective resources may be configured either via separate signalings or combined via a timer. Thus, in some implementations, a resource is configured with a single signaling that is cell specific. In some implementations, the timer for switching is configured in a UE-specific manner.

[0051] (2) Transmission resource switching sequence in NTN scenarios

[0052] While mobility in an NTN system provides a trade-off between satellite mobility and UE mobility, satellite speed is the dominant factor. As a result, the UE's trajectory considering relative movement should be a half-straight line as shown in FIG. 7. Hence, the transmission resource switching sequence can be predicted by the network and the UE (if the ephemeris is available). In this example, the UE is served in time by BWP1 → BWP3 → BWP2 → BWP4 → BWP1. The switching sequence of the transmission resources is reflected by the switching sequence BWP {1, 3, 2, 4}, which is a period in time. In order to support the transmission resource switching sequence, the cell configuration information element, eg ServingCellConfig IE, includes a new bwp-SwitchList element to indicate the BWP switching sequence. In some implementations, bwp-SwitchList may specify a sequence of BWP identifiers. For example, the bwp-SwitchList definition is the following: a sequence (size 4) of the BWP identifier. In the example of FIG. 7, the bwp-SwitchList, which is determined as (1, 3, 2, 4) based on the UE trajectory, has a size of 4. In this example of FIG. 7, the BWP ID is an integer type, and its value has a range defined by (1...maxNrofBWPsSequence). In this example, maxNrofBWPsSequence is 4. So the BWP ID has a range of 1-4.

[0053] (3) How to determine the duration of the timer

[0054] The length of the bwp-InactivityTimer is determined by the network using: UE predicted trajectory, beam diameter, and beam overlap size. To determine the timer for each UE on the network side, eg on the gNB side, some shaping may be required from the UE side. For example, the following are examples of information required from a UE:

[0055] - Tracking a user device, including a procedure, speed, or state (eg, move, stop). This information shall be reported to the gNB by the UE

[0056] - UE characteristics for location determination

[0057] FIG. 8 shows an enlarged view of the beams on the path of the UE in FIG. 7. It is easy to understand that the service time T1 of BWP1 and BWP2 is identical, which results from regular beam spreading. Similarly, the service time T2 of BWP3 and BWP4 is identical. T1 and T2 are defined by the path length for each beam and the relative speed. The minimum and maximum values of T1 and T2 are illustrated in FIG. 8. The length of the timer can be added to the IE ServingCellConfig using the new bwp-InactivityTimerList element instead of bwp-InactivityTimer. In some implementations, bwp-InactivityTimerList may specify a bwp-InactivityTimer sequence. In the example of FIG. 8, bwp-InactivityTimer, the one defined as (T1, T2) has a size of 2. In this example of FIG. 8, bwp-InactivityTimer is an enumerated type, but its range is determined by (min(T1min, T2min), max(T1max, T2max)).

[0058] Clause 3: The UE receives the RRC Reconfigure message and uses T1 as a timer for its stay in BWP1. When T1 expires, the UE switches to BWP3 and starts timer T2. When T2 expires, the UE switches to BWP2 and starts timer T1. When T1 expires, the UE switches to BWP4 and starts timer T2. When T2 expires, the UE switches to BWP1 and starts timer T1. Timer-based automatic BWP switching occurs periodically.

[0059] Clause 4: After switching transmission resources, the UE monitors DL channels on the new transmission resource and performs its UL transmission on the new transmission resource.

[0060] Clause 5: After the transmission resource switch, if the UE successfully receives a DL (downlink) signal, for example, SSB/CSI-RS, in the new BWP, the UE may send a message along with the measurement to the network as an acknowledgment of the success of the resource switch transmission. The message content may include at least one of the CSIs of the new transmission resource or the RSRP (reference signal received power) of the adjacent transmission resource.

[0061] Switching Transmission Resources Based on Thresholds

[0062] In the current NR specifications, the UE should monitor the downlink quality based on the reference signal in the configured radio link monitoring reference signal (RLM-RS) resources. The configured RLM-RS resources may be exclusively SSB, or exclusively CSI-RS, or a combination of SSB and CSI-RS. Below, the RLM-RS resources are explained as an example of a configured signal, but other signals may be used to monitor downlink quality. The UE need not necessarily perform RLM outside of the active DL BWP. To reuse the RLM measurement in automatic BWP switching, the SSB of the current cell must be covered by different BWPs. Examples of the relationship between SSB and BWP are shown in FIG. 9. Larger BWP bandwidth requires a larger Fast Fourier Transform (FFT) size on the UE side. In this example, although BWP3 includes BWP1, only the non-overlapping part needs to be used in a beam conforming to BWP3 in order to support the obvious frequency reuse pattern. The same principle applies to BWP4, in which only the non-overlapping part (ie, excluding the frequency resource covered by BWP2) can be used in a beam corresponding to BWP4.

[0063] Threshold-based transmission resource switching may be implemented in various ways depending on whether the UE or the network decides to switch. In some implementations, the UE performs automatic switching. In some other implementations, based on messages from the UE, the network device determines whether or not to perform the switch and provides the UE with an instruction to switch. The descriptions below are provided for each of the cases.

[0064] Implementation 2: Automatic switching by user device

[0065] Clause 1: In some implementations, network identification information, such as the PLMN ID, of an NTN system is set to be different from traditional terrestrial networks. For example, the UE uses network identification information, such as a PLMN ID, to report whether its serving network is or is not an NTN system.

[0066] Item 2: If the serving network is an NTN system, the UE reports its performance to the network. Included in the UE capability message is its supported maximum BWP bandwidth (or largest FFT size). If the maximum BWP bandwidth supported by the UE is not less than the system's BWP deployment, the UE may use the RLM measurement to perform BWP (beam) switching automatically.

[0067] Clause 3: For a UE with automatic beam switching BWP (beam) switching capabilities with RLM measurement, the network uses RRC reconfiguration to set a list of BWP identifiers for automatic beam switching. An example of a message sequence using an RRC reconfiguration message has already been explained with reference to FIG. 6 above.

[0068] In an example of switching transmission resources based on thresholds, a configuration message, such as IE ServingCellConfig, may contain a new bwp-SwitchList element in order to specify a list of BWP identifiers to be switched. For example, the bwp-SwitchList definition is: a sequence of (size 4) BWP-Ids. In the example shown in FIG. 9, if the characteristics of the UE support the bandwidth of all four BWPs, bwp-SwitchList is a list (1, 2, 3, 4), which is a list of BWP IDs in the current cell deployment. If the UE capabilities only support part of the bandwidth of four BWPs, bwp-SwitchList is a list of the corresponding set of BWP IDs.

[0069] The BWP-Id definition may still be an integer type, and the BWP-Id may have a range defined as (1...maxNrofBWPsSequence). In this example, maxNrofBWPsSequence=4, which is determined by the frequency reuse factor. So the BWP-Id has a range of 1-4.

[0070] In another example of switching transmission resources based on thresholds, a configuration message, such as IE ServingCellConfig, may contain a new bwp-SwitchThreshold element in order to indicate a BWP automatic switching condition. The bwp-SwitchThreshold definition is an integer type, its unit may be dB, to indicate the dead interval between the downlink radio quality of the serving beam and adjacent beams.

[0071] Item 4: The UE receives an RRC reconfiguration message from the network. The UE uses bwp-SwitchList as the set of BWP IDs supporting automatic BWP switching.

[0072] Clause 5: The UE should monitor the downlink quality based on the reference signal in the configured RLM-RS resource(s) to detect the downlink radio quality of the current serving beam and adjacent beams. The configured RLM-RS resources may be exclusively SSB or exclusively CSI-RS, DMRS (demodulation reference signal), or a combination of SSB, CSI-RS and DMRS. The downlink quality is called "M _{bwp_id} ".

[0073] Item 6: The configured RLM-RS resources are associated with each transmission resource. In some implementations, the association may be performed by providing a transmission resource identifier in the reference signal (set) identifier. In some implementations, the association may be by mapping between a transmission resource identifier and a reference signal (set) identifier.

[0074] Clause 7: For each RLM-RS resource, the UE should evaluate the radio downlink quality of the various BWPs in the bwp-SwitchList. The radio downlink quality measurement may be obtained by a one-time measurement or a long-term average measurement.

[0075] Clause 8: The UE should compare the downlink radio quality of the current serving BWP and the downlink radio quality of neighboring BWPs. As an example, the following comparison rules may be used to determine whether or not to perform a transmission resource switch.

(1) If M _{serving_BWP} < bwp-SwitchThreshold and at least one of M _{neighboring_BWP} > bwp-SwitchThreshold, the UE automatically switches to a new resource, eg BWP and/or beam, with the new resource corresponding to the largest M _{neighboring_BWP} .

(2) If M _{serving_BWP} < bwp-SwitchThreshold+offset1 and at least one of M _{neighboring_BWP} > bwp-SwitchThreshold, the UE automatically switches to a new resource, eg BWP and/or beam, with the new resource corresponding to the largest M _{neighboring_BWP} .

(3) If M _{serving_BWP} < bwp-SwitchThreshold + offset1 and at least one of M _{neighboring_BWP} > bwp-SwitchThreshold + offset2, the UE automatically switches to a new resource, eg BWP and/or beam, with the new resource corresponding to the largest M _{neighboring_BWP} .

(4) If M _{serving_BWP} < bwp-SwitchThreshold + offset1, the UE automatically switches to a new resource with a channel quality within a certain range and provides the shortest distance between the user device and the resource candidate reference location.

[0076] Clause 9: After the transmission resource switch, if the UE successfully receives a DL signal such as SSB/CSI-RS on the new BWP, it may notify the network device of the success of the switch. Some examples for network device notification are provided as follows:

[0077] (1) The UE may send a message along with the measurement to the network as confirmation of the success of the switch. The content of the message may include the CSI of the new transmission resource or the RSRP of the adjacent transmission resource.

[0078] (2) The UE may initiate a BSR (buffer status message).

[0079] (3) The UE may initiate a CSI message.

[0080] (4) The UE may initialize a RACH with no content (or a two-stage RACH including the UE ID in the MSGA).

[0081] Implementation 3. Switching Instructed by Network Device Based on Message from UE

[0082] Items 1-5 of automatic switching by the user device, which is explained above, can also be applied to the present implementation to implement the switching instructed by the network device.

[0083] Clause 6: For each RLM-RS resource, the UE should evaluate the radio downlink quality of the various BWPs in the bwp-SwitchList. The UE should compare the downlink radio quality of the current serving BWP and the downlink radio quality of neighboring BWPs. The communication by the UE is carried out based on the following methods:

(1) If M _{serving_BWP} < bwp-SwitchThreshold and at least one of the M _{neighboring_BWP} > bwp-SwitchThreshold, the UE reports the M _{serving_BWP} and the largest M _{neighboring_BWP} along with the respective BWPs.

(2) If M _{serving_BWP} < bwp-SwitchThreshold + offset1 and at least one of the M _{neighboring_BWP} > bwp-SwitchThreshold, the UE reports the M _{serving_BWP} and the largest M _{neighboring_BWP} along with the respective BWPs.

(3) If M _{serving_BWP} < bwp-SwitchThreshold + offset1 and at least one of the M _{neighboring_BWP} > bwp-SwitchThreshold + offset2, the UE reports the M _{serving_BWP} and the largest M _{neighboring_BWP} along with the respective BWPs.

(4) If M _{serving_BWP} < bwp-SwitchThreshold+offset1, the UE reports M _{neighboring_BWP} of the resource candidate whose channel quality is within a certain range and provides the shortest distance between the user device and the reference location of the resource candidate.

[0084] Clause 7: In some implementations, the network device uses (i) RRC reconfiguration, (ii) PDCCH DCI format 0_1, or (iii) PDCCH DCI format 1_1 to inform the UE of being able to switch BWP when needed. In some implementations, the network device may instruct a handoff to a resource that was previously signaled by the UE. In some implementations, the network device may instruct a switch to a resource determined by the network device, wherein the resource may be: (i) one of the resource options indicated by the UE, or (ii) a resource determined by the network device, regardless of whether what the UE reports.

[0085] Switching transmission resources based on location information

[0086] In an NTN system, the location of the center of the beams changes as the satellite moves along its orbit. The basic idea of switching transmission resources based on location information uses the distance between the UE and the beam center location to find the best beam for the UE. To support transmission resource switching based on location information, the following information must be available on the UE side:

[0087] - The location of the center of the beams obtained from the DL broadcast through the network.

[0088] - The location of the UE itself and the dimension of this location, ie. two-dimensional or three-dimensional.

[0089] - UE location accuracy.

[0090] The switching of transmission resources based on the location information may be implemented in different ways depending on whether it is a distance that should only be considered for automatic switching of the UE. In some implementations, the UE performs automatic switching based on distance only. In some other implementations, the UE performs automatic switching based on distance and threshold. The descriptions below are provided for each of the cases.

[0091] Implementation 4: Automatic switching by UE based on distance only

[0092] Clause 1: In some implementations, network identification information, such as the PLMN identifier, of an NTN system is set to be different from traditional terrestrial networks. For example, the UE uses network identification information, such as a PLMN ID, to report whether its serving network is an NTN system or not.

[0093] Item 2: If the serving network is an NTN system, the UE reports its performance to the network. If the UE has location information, then the location information should be included in the UE capability message. The location dimension (2D or 3D including altitude information) must also be reported to the network. The accuracy of the location information should be reported to the network when available.

[0094] Clause 3: If the UE is capable of reporting its location with sufficient accuracy, the network may configure a range of distances at the UE. The UE may use distance calculation to perform BWP (beam) switching automatically.

[0095] Clause 4: For a UE with the capability to support BWP (beam) switching automatically with distance measurement, the network may use RRC reconfiguration as shown in FIG. 6 to set the list of BWP IDs for automatic beam switching. The content of the configuration message is described below.

[0096] (1) In IE, ServingCellConfig contains a new bwp-SwitchList element to specify a list of BWP switchable IDs.

[0097] The bwp-SwitchList definition is: a sequence (size 4) of the BWP-Id. In the example shown in FIG. 7, if the UE characteristics support the bandwidth of all four BWPs, bwp-SwitchList is a list (1, 2, 3, 4) which is a list of BWP IDs in the current cell deployment. If the UE capabilities only support part of the bandwidth of four BWPs, bwp-SwitchList is a list of the corresponding set of BWP IDs.

[0098] The BWP-Id definition is still an integer type, but its value range is defined as (1...maxNrofBWPsSequence). In this example, maxNrofBWPsSequence=4, which is determined by the frequency reuse factor. So the BWP ID has a range of 1-4.

[0099] (2) In IE, ServingCellConfig contains a new bwp-SwitchDistance element to indicate the automatic BWP switching condition.

[0100] The bwp-SwitchDistance definition is an integer type, its unit may be km to indicate a valid range of distances between the UE and the beam center location.

[0101] Item 5: The UE receives an RRC reconfiguration message from the network. The UE uses bwp-SwitchList as the set of BWP IDs supporting automatic BWP switching.

[0102] Clause 6: The UE should monitor the DL broadcast including the beam center location. The UE calculates the distance from itself to the location of the center of the beams. The distance is called "D _{bwp_id} ".

[0103] Clause 7: The UE should compare the distance between (i) its location and the beam center location of the current serving beam, and (ii) its location and the beam center location of adjacent beams corresponding to different BWPs. It may use the following comparison rules to determine whether or not to perform a transmission resource switch. In some implementations, if the distance between the UE and the center location of the current beam is not the shortest, the UE switches to the resource candidate with the shortest distance. In some implementations, if the distance between the UE and the center location of the current beam exceeds the corresponding range, the UE switches to the resource candidate with the shortest distance.

[0104] Clause 8: After the transmission resource switch, if the UE successfully receives a DL signal such as SSB/CSI-RS on the new BWP, it may notify the network device of the success of the switch. Some examples for network device notification are provided as follows:

[0105] (1) The UE may send a message along with the measurement to the network as confirmation of the success of the switch. The content of the message may include the CSI of the new transmission resource or the RSRP of the adjacent transmission resource.

[0106] (2) The UE may initiate a BSR (buffer status message).

[0107] (3) The UE may initiate a CSI message.

[0108] (4) The UE may initialize a RACH with no content (or a two-stage RACH including the UE ID in msg-a).

[0109] Implementation 5: Automatic switching by UE based on distance and threshold

[0110] In some implementations, steps 1-7 of automatic switching by user device (implementation 2) may be applied to the present implementation to implement automatic switching by user device based on distance and threshold. In some other implementations, steps 1-4 of automatic switching by user device based on distance only (implementation 4) may be applied to the present implementation to implement automatic switching by user device based on distance and threshold.

[0111] The UE should compare the distance of the current serving beam and the distance of adjacent beams according to different BWPs. The UE should compare the DL link quality of the current BWP and neighboring BWPs.

[0112] If M _{serving_BWP} < bwp-SwitchThreshold and at least one of M _{neighboring_BWP} > bwp-SwitchThreshold, the UE switches to the beam with the shortest distance.

[0113] FIG. 10-12 show examples of wireless communication schemes based on some implementations of the disclosed technology.

[0114] The wireless communication scheme as shown in FIG. 10 includes configuring (S1010), by the network device, a configuration message so as to switch transmission resources between sets of resources, and communicating (S1020), by the network device, with the user device so as to perform transmission resource switching. .

[0115] The wireless communication scheme as shown in FIG. 11 includes receiving (S1110), from the network device, a configuration message including timer information that indicates a time for the user equipment to remain in the corresponding resource, and performing (S1120) switching transmission resources between resource sets based on the timer information.

[0116] The wireless communication scheme as shown in FIG. 12 includes receiving (S1210), by the user equipment, from the network device, a configuration message including threshold or location information that is used to facilitate switching of transmission resources between resource sets.

[0117] Additional features and embodiments of the methods/technologies described above may be preferred features of some embodiments and are described below using a description format based on parts of the claims.

[0118] 1. A wireless communication method, comprising: configuring, by a network device, a configuration message so as to enable switching of transmission resources between sets of resources; and communicating, via the network device, with the user device so as to perform transmission resource switching. The network device may include BS 120 as shown in FIG. 1 and the user equipment may include a UE as shown in FIG. 1. In some implementations, handover of a resource may include handover as mentioned in [0032]-[0038] of this patent document. In some implementations, resources may include resources as described in [0028]-[0031] of this patent document.

[0119] 2. The wireless communication method according to Claim 1, wherein i) the resource sets include spatial domain resources, ii) the resource sets include frequency domain resources, or iii) the resource sets include time domain resources.

[0120] 3. The wireless communication method according to Claim 1, wherein switching transmission resources includes i) switching between resources of one area or ii) switching between resources of multiple areas.

[0121] 4. The wireless communication method according to Claim 1, wherein configuring includes configuring a configuration message to include timer information to cause transmission resource switches to occur based on the timer information.

[0122] 5. The wireless communication method according to clause 4, wherein the timer information includes one or more timers associated with respective resources.

[0123] 6. The wireless communication method of Claim 5, further comprising: determining, by the network device, a timer duration based on at least one of a user device trajectory, a beam diameter, or an overlapping beam range size.

[0124] 7. A Claim 1 wireless communication method, wherein configuring includes configuring a configuration message such that it includes an element indicating a transmission resource switching sequence, the sequence including one or more resource set identifiers that serve the user device.

[0125] 8. The wireless communication method according to Claim 1, wherein configuring includes configuring a configuration message to include threshold or location information that is used to help switch transmission resources.

[0126] 9. The wireless communication method according to clause 8, wherein the threshold may include at least one of i) RSRP (reference received power), ii) RSRQ (reference received quality), iii) SINR (signal-to-interference-and-noise ratios) or iv) offset values.

[0127] 10. The wireless communication method according to Claim 1, wherein configuring includes configuring a configuration message to include a list of resource identifiers indicating resource options for switching transmission resources.

[0128] 11. The wireless communication method according to clause 8, wherein the location information further includes at least one of i) a reference location of a corresponding resource, ii) a distance threshold, or iii) a distance offset.

[0129] 12. The wireless communication method according to Claim 1, wherein the configuration message is an RRC (Radio Resource Control) layer reconfiguration message.

[0130] 13. A wireless communication method, including: receiving, from a network device, a configuration message including timer information that indicates a time for a user device to remain in a corresponding resource; and performing transmission resource switching between the resource sets based on the timer information. The configuration message may include an RRC configuration message as described herein. In some implementations, switching transmission resources between resource sets based on timer information may include switching transmission resources based on the timer, as described herein.

[0131] 14. The wireless communication method according to clause 13, wherein the resource sets include at least one of i) spatial domain resources, ii) frequency domain resources, or iii) time domain resources.

[0132] 15. The wireless communication method according to clause 13, wherein switching transmission resources includes i) switching between resources of one area or ii) switching between resources of several areas.

[0133] 16. The wireless communication method according to clause 13, further comprising providing a compromise between at least one of the following: transmitting, to the network device, location information of the user device; or transmitting, to the network device, the trajectory information of the user device.

[0134] 17. The wireless communication method according to clause 13, further comprising, after performing a transmission resource switch: transmitting, by a user equipment, measurements including at least one of channel state information (CSI) of a transmission resource or received power reference signals (RSRP) of adjacent transmission resources.

[0135] 18. The wireless communication method according to clause 13, further comprising, after performing a transmission resource switch: initializing timer information to measure a residence time in the switched resource; and switching to another resource after the time has elapsed, wherein the configuration message includes information regarding the other resource.

[0136] 19. The wireless communication method according to clause 13, further comprising performing an uplink transmission using a different resource.

[0137] 20. The wireless communication method according to clause 13, wherein the timer information includes an inactivity timer associated with a corresponding resource, wherein the inactivity timer has a length determined by the network device based on at least one of the user device trajectory, beam diameter or beam overlap size.

[0138] 21. The wireless communication method according to clause 13, wherein switching transmission resources includes switching part of the frequency band (BWP), and the configuration message includes an element indicating the sequence of switching BWP, and the sequence includes one or more BWP -identifiers that serve the user device.

[0139] 22. A wireless communication method, including: receiving, by a user device from a network device, a configuration message including threshold or location information that is used to facilitate switching of transmission resources between resource sets. The configuration message may include an RRC configuration message as described herein, and switching transmission resources between resource sets may include switching transmission resources based on thresholds or transmission resources based on location information, as described herein.

[0140] 23. The wireless communication method according to clause 22, further comprising: monitoring downlink quality based on a reference signal including at least one of i) SSB (sync signal block), ii) CSI-RS (reference signal) tracking channel state information), iii) CSI-RS for CSI (channel state information), iv) CSI-RS for BM (beam steering), or v) DM-RS (demodulation reference signal).

[0141] 24. The wireless communication method according to clause 23, wherein the reference signal is associated with each transmission resource by providing a transmission resource identifier in the reference signal identifier or by mapping between the transmission resource identifier and the reference signal identifier.

[0142] 25. The wireless communication method according to clause 23, wherein monitoring downlink quality includes measuring average quality over a period on configured resources associated with a set of resources.

[0143] 26. The wireless communication method according to clause 22, further comprising comparing the quality of the current resource with the quality of the resource candidates, and i) when determining that the quality of the current resource is less than a threshold, switching to the best quality resource candidate, ii) when determining that the quality of the current resource is less than the sum of the threshold and the specified offset, switch to the best quality resource candidate, iii) when determining that the quality of the current resource is less than the sum of the threshold and the first offset, switch to the best resource candidate quality that is greater than the sum of the threshold value and the second offset, or iv) upon determining that the quality of the current resource is less than the sum of the threshold value and the third, switching to a resource candidate with a channel quality within a certain range and the shortest distance between the user device and the reference location possible resource option.

[0144] 27. The wireless communication method according to clause 22, further comprising notifying the network device of switching transmission resources.

[0145] 28. The wireless communication method according to clause 27, wherein the notification includes i) sending a measurement message to a network device, ii) initiating a BSR (Buffer Status Message), iii) initiating a CSI (Channel Status Information) message or iv) initializing a RACH (random access procedure) with no content or a two-stage RACH including a user device identifier.

[0146] 29. The wireless communication method according to clause 22, further comprising: determining, by the user equipment, whether or not the channel quality satisfies a predetermined condition; generating messages, to the network device, with the downlink quality of the current resource and the downlink quality of the resource candidate; and receiving an indicator from the network device so as to switch the current resource to another resource.

[0147] 30. The wireless communication method according to clause 22, further comprising: generating messages, by the user device, with performance information about the user device, to the network device.

[0148] 31. The wireless communication method according to clause 29, further comprising: i) upon determining that the distance between the user device and the reference location of the current resource is not the shortest, switching to the resource candidate that provides the shortest distance between the user device and the reference the location of a possible resource option; ii) upon determining that the distance between the user device and the current resource candidate reference location exceeds a predetermined range, switching to the resource candidate that provides the shortest distance between the user device and the resource candidate reference location; or iii) upon determining that the quality of the current resource is less than the sum of the threshold and the determined offset, switching to a resource candidate with a channel quality within the defined range and providing the shortest distance between the user device and the reference location of the resource candidate.

[0149] 32. Communication equipment, comprising a processor configured to implement the method set forth in any one or more of provisions 1-31.

[0150] 33. A computer-readable medium storing code, wherein the code, when executed, instructs the processor to implement the method set forth in any one or more of clauses 1-31.

[0151] The detailed description, together with the drawings, is intended to be considered exemplary only, with "exemplary" meaning "example" and, unless otherwise indicated, not implying an ideal or preferred embodiment. As used herein, the use of "or" is intended to include "and/or" unless the context clearly indicates otherwise.

[0152] Some embodiments described herein are described in the general context of methods or processes that may be implemented in one embodiment by a computer program product implemented on a computer-readable medium including computer-executable instructions, such as program code executable by computers in networked environments. Computer readable media may include removable and non-removable storage devices including, but not limited to, read only memory (ROM), random access memory (RAM), compact discs (CDs), digital versatile discs (DVDs), etc. .d. Therefore, computer-readable media may include non-volatile storage media. Program modules may include procedures, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. Machine- or processor-executable instructions, associated data structures, and program modules represent examples of program code for performing the steps of the methods disclosed herein. The specific sequence of these executable instructions or associated data structures provides examples of appropriate actions to implement the functions described in these steps or processes.

[0153] Some disclosed embodiments may be implemented as devices or modules using hardware circuitry, software, or combinations of the foregoing. For example, a hardware circuit implementation may include discrete analog and/or digital components that are, for example, integrated as part of a printed circuit board. Alternatively or additionally, the disclosed components or modules may be implemented as an application specific integrated circuit (ASIC) and/or as a field programmable gate array (FPGA) device. Some implementations may additionally or alternatively include a digital signal processor (DSP), which is a dedicated microprocessor with an architecture optimized for the digital signal processing functional needs associated with the disclosed functionality of this application. Likewise, various components or subcomponents within each module may be implemented in software, hardware, or firmware. Connection between modules and/or components within modules may be provided using any of the connection methods and media and media that are known in the art, including, but not limited to, communication over the Internet, wired or wireless networks using appropriate protocols.

[0154] Although this document contains a lot of specific information, they should not be construed as limitations on the scope of the invention, which is given in the claims, or what can be given in the claims, but instead as descriptions of features specific to certain embodiments. Certain features that are described in this document in the context of separate embodiments may also be implemented in combination in one embodiment. Conversely, various features that are described in the context of one embodiment may also be implemented in multiple embodiments individually or in any suitable subcombination. In addition, although the features may be described above as operating in certain combinations and even initially stated in the claims per se, one or more features from the claimed combination may in some cases be excluded from the combination, and the claimed combination may be directed to a subcombination or variation. subcombinations. Likewise, although the operations are illustrated in the drawings in a specific order, this should not be understood as a requirement that such operations must be performed in the particular order shown or in sequential order, or that all illustrated operations must be performed in order to achieve the desired results.

[0155] Only a few implementations and examples are described, and other implementations, improvements, and variations may be made based on what is described and illustrated in this disclosure.

Claims (36)

1. A wireless communication method comprising the steps of: configuring, by the network device, a configuration message to enable switching of transmission resources between resource sets, wherein each resource set is associated with the first resource type and the second resource type, and switching the transmission resources causes the first resource type and the second resource type to switch to the corresponding resource; And communicate via the network device with the user device to perform transmission resource switching, wherein the configuration message includes an element indicating a transmission resource switching sequence for the first resource type, the sequence including a plurality of resource identifiers (IDs) in a specific order, such that the first resource type is switched between different ranges corresponding to said plurality of resource IDs , according to this particular order. 2. The wireless communication method according to claim 1, wherein, with said configuration, the configuration message is configured to include information that includes at least one of the timer information to instruct the implementation of transmission resource switching based on the timer information. , and a threshold or location information that is used to facilitate switching of transmission resources. 3. The wireless communication method of claim 2, further comprising determining, by the network device, a timer duration based on at least one of a user device trajectory, a beam diameter, and a beam overlap size. 4. The wireless communication method of claim 2, wherein the threshold may include at least one of i) RSRP (reference received power), ii) RSRQ (reference received quality), iii) SINR (signal ratio). -to-interference-and-noise") and iv) an offset value, wherein the location information further includes at least one of i) a corresponding resource reference location, ii) a distance threshold, and iii) a distance offset. 5. A wireless communication method, including the steps of: receiving by the user device from the network device a configuration message including information to be used for switching transmission resources between resource sets, wherein each resource set is associated with the first resource type and the second resource type, and switching the transmission resources results in switching the first resource type and the second resource type to the corresponding resource; And switching transmission resources between said resource sets based on said information, and wherein the configuration message includes an element indicating a transmission resource switching sequence for the first resource type, the sequence including a plurality of resource identifiers (IDs) in a specific order, such that the first resource type is switched between different ranges corresponding to said plurality of resource IDs , according to this particular order. 6. The wireless communication method of claim 5, wherein said information corresponds to timer information that indicates the amount of time the user device needs to stay in the corresponding resource, the method further comprising at least one of: transmitting the location information of the user device to the network device, transmitting the trajectory information of the user device to the network device, or performing an uplink transmission using another resource. 7. The wireless communication method of claim 5, further comprising, after performing the transmission resource switch, transmitting, by the user equipment, measurements including at least one of the channel state information (CSI) of the transmission resource and the power of the received reference signals. (RSRP) neighboring transmission resources. 8. The wireless communication method according to claim 5, wherein said information corresponds to timer information that indicates the time for which the user equipment needs to stay in the corresponding resource, the method further comprising, after performing the transmission resource switch, the steps of: initializing the timer information to measure the residence time in the switched resource; And switching to another resource after the measured time has elapsed, wherein the configuration message includes information regarding the other resource. 9. The wireless communication method according to claim 5, wherein said information corresponds to timer information that indicates a time for which the user equipment needs to stay in the corresponding resource, wherein the timer information includes an inactivity timer associated with the corresponding resource, wherein the timer of inactivity has a duration determined by the network device based on at least one of the user device trajectory, the beam diameter, and the size of the overlapping beam range, wherein the transmission resource switching includes switching a part of the frequency band (BWP), and the configuration message includes the element A indicating a BWP switching sequence, the sequence including one or more BWP identifiers that serve the user device. 10. The wireless communication method of claim 5, wherein said information corresponds to a threshold or location information that indicates a threshold-related condition or a location-related condition for switching transmission resources. 11. The wireless communication method of claim 10, further comprising monitoring downlink quality based on a reference signal included in the configuration message, the reference signal including at least one of i) SSB (Sync Signal Block) , ii) CSI-RS (channel state information reference signal for tracking), iii) CSI-RS for CSI (channel state information), iv) CSI-RS for BM (beam steering), and v) DM-RS (demodulation reference signal ), wherein the reference signal is associated with each transmission resource by providing a transmission resource identifier in the reference signal identifier or a mapping between the transmission resource identifier and the reference signal identifier. 12. The wireless communication method of claim 10, further comprising comparing the quality of the current resource with the quality of the candidate resources, and i) upon determining that the quality of the current resource is less than a threshold value, switching to the resource candidate with the best quality, ii) upon determining that the quality of the current resource is less than the sum of the threshold value and the specific offset, switch to the resource candidate with the best quality, iii) upon determining that the quality of the current resource is less than the sum of the threshold and the first bias, switch to the best quality resource candidate that is greater than the sum of the threshold and the second bias, or iv) upon determining that the quality of the current resource is less than the sum of the threshold and the third offset, switch to the resource candidate with the channel quality within the specific range and the shortest distance between the user device and the reference location of the resource candidate. 13. The wireless communication method of claim 10, further comprising the steps of: determining by the user device whether the channel quality satisfies a predetermined condition; informing the network device of the downlink quality of the current resource and the downlink quality of the candidate resource; And receiving from the network device an indication to switch the current resource to another resource. 14. The wireless communication method of claim 10, further comprising the steps of: i) upon determining that the distance between the user device and the current resource candidate reference location is not the shortest, switching to the resource candidate that provides the shortest distance between the user device and the resource candidate reference location; ii) upon determining that the distance between the user device and the current resource candidate reference location exceeds a predetermined range, switching to the resource candidate that provides the shortest distance between the user device and the resource candidate reference location; or iii) upon determining that the quality of the current resource is less than the sum of the threshold and the specific offset, switch to a resource candidate with a channel quality within the specific range and provide the shortest distance between the user device and the reference location of the resource candidate. 15. A communication device comprising a processor configured to implement the method set forth in any one or more of claims 1-4.

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