Avoiding TCI reselection due to active BWP handover

Abstract

Certain aspects of the present disclosure provide for avoiding transmission configuration indication (TCI) reselection due to active BWP handover, particularly techniques for avoiding transmission configuration indication (TCI) reselection (e.g., due to some bandwidth portion (BWP) handover scenarios). One exemplary method generally includes configuring a UE with TCI state information for communication via a plurality of BWPs, wherein the TCI state information indicates at least first and second types of quasi-co-location (QCL) hypotheses; and determining whether to reconfigure the TCI state of the UE to reflect the BWP handover based on one or more rules defining the BWP handover for a reference signal (RS) of at least one of the QCL hypothesis types without the need for TCI state reconfiguration. Other aspects and embodiments are also claimed and described.

Description

[0001] This invention patent application is a divisional application of the invention patent application with international application number PCT / US2020 / 025525, international application date March 27, 2020, application number 202080023374.9 entering the Chinese national phase, and name “Avoiding TCI Reselection Caused by Active BWP Switching”.

[0002] CROSS-REFERENCE TO RELATED APPLICATIONS

[0003] This application claims priority to U.S. Application No. 16 / 831,541, filed on March 26, 2020, which claims the benefit of and priority to U.S. Non-Provisional Application No. 16 / 830,800, filed on March 26, 2020, U.S. Provisional Application No. 62 / 826,918, filed on March 29, 2019, U.S. Provisional Application No. 62 / 826,907, filed on March 29, 2019, and U.S. Provisional Application No. 62 / 826,953, filed on March 29, 2019, all of which are hereby assigned to the assignee of this application and are hereby expressly incorporated herein by reference as if fully set forth below and for all applicable purposes. Technical Field

[0004] Aspects of the present disclosure relate to wireless communications, and more particularly to techniques for avoiding transmission configuration indication reselection due to bandwidth fraction switching. Some aspects and techniques may be used to reduce signaling overhead and save power at certain devices within a communication network. Background Art

[0005] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcast, etc. These wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access systems include Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SC-FDMA) systems, and Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, to name just a few.

[0006] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city, country, region, and even global level. New radio (e.g., 5G NR) is an example of an emerging telecommunication standard. NR is an enhancement set of the LTE mobile standard promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by improving spectrum efficiency, reducing costs, improving services, utilizing new spectrum, and better integrating with other open standards using OFDMA with cyclic prefix (CP) on downlink (DL) and uplink (UL). To this end, NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.

[0007] As the demand for mobile broadband access continues to grow, there is a need for further improvements to NR and LTE technologies. Preferably, these improvements should be applicable to other multiple access technologies and the telecommunication standards that employ these technologies. Summary of the invention

[0008] The systems, methods, and devices of the present disclosure each have several aspects, no single one of which is solely responsible for its desirable attributes. Without limiting the scope of the present disclosure as expressed in the appended claims, some features will now be discussed briefly. After considering this discussion, and particularly after reading the section entitled "Detailed Description," it will be understood how the features of the present disclosure provide advantages including improved communication between access points and stations in a wireless network.

[0009] Certain aspects provide a method for wireless communication by a network entity. The method generally includes configuring a UE with transmission configuration indication (TCI) state information for communication via multiple bandwidth parts (BWPs). The TCI state information may indicate at least a first and a second type of quasi co-location (QCL) assumption. The method may also include determining whether to reconfigure the TCI state of the UE to reflect the BWP switching. The determination may be based on one or more rules. In some cases, the one or more rules may define a reference signal (RS) for at least one of the QCL assumption types to perform a BWP switching without requiring a TCI state reconfiguration.

[0010] Certain aspects provide an apparatus for wireless communication by a network entity. The apparatus generally includes at least one processor configured to: configure a UE with transmission configuration indication (TCI) state information for communication via multiple bandwidth parts (BWPs). The TCI state information may indicate at least a first and a second type of quasi-co-existence (QCL) assumption. Additionally or alternatively, the at least one processor may be further configured to determine whether to reconfigure the TCI state of the UE to reflect the BWP switching. The determination may be based on one or more rules. In some cases, the one or more rules define a reference signal (RS) for at least one of the QCL assumption types to perform a BWP switching without the need for TCI state reconfiguration. The apparatus generally also includes a memory coupled to the at least one processor.

[0011] Certain aspects provide an apparatus for wireless communication by a network entity. The apparatus generally includes a device for configuring a UE with transmission configuration indication (TCI) state information for communication via multiple bandwidth parts (BWP). The TCI state information may indicate at least a first and a second type of quasi co-location (QCL) assumption. Additionally or alternatively, the apparatus may further include a device for determining whether to reconfigure the TCI state of the UE to reflect the BWP switching. In some cases, the determination may be based on one or more rules. In some cases, one or more rules may define a reference signal (RS) for at least one of the QCL assumption types to perform a BWP switching without requiring a TCI state reconfiguration.

[0012] Certain aspects provide a non-transitory computer-readable medium for wireless communication by a network entity. The non-transitory computer-readable medium generally includes instructions that, when executed by at least one processor, cause the at least one processor to: configure a UE with transmission configuration indication (TCI) state information for communication via multiple bandwidth parts (BWPs). The TCI state information may indicate at least a first and a second type of quasi-co-existence (QCL) assumption. Additionally or alternatively, the non-transitory computer-readable medium may further include instructions that cause the at least one processor to: determine whether to reconfigure the TCI state of the UE to reflect the BWP switch. The determination may be based on one or more rules. In some cases, the one or more rules define that a reference signal (RS) for at least one of the QCL assumption types is switched to a BWP without requiring a TCI state reconfiguration.

[0013] Certain aspects provide a method for wireless communication by a user equipment (UE). The method generally includes receiving transmission configuration indication (TCI) state information for communication via a plurality of bandwidth parts (BWPs). The TCI state information may indicate at least a first and a second type of quasi co-location (QCL) assumptions. Additionally or alternatively, the method may further include monitoring at least a first reference signal (RS) of at least one of the QCL assumption types in accordance with the BWP switching without TCI state reconfiguration.

[0014] Certain aspects provide an apparatus for wireless communication by a user equipment (UE). The apparatus generally includes at least one processor configured to: receive transmission configuration indication (TCI) state information for communication via multiple bandwidth parts (BWPs). The TCI state information may indicate at least a first and a second type of quasi co-location (QCL) assumptions. Additionally or alternatively, the at least one processor may be further configured to: monitor at least a first reference signal (RS) of at least one of the QCL assumption types in accordance with BWP switching without TCI state reconfiguration. The apparatus generally may also include a memory coupled to the at least one processor.

[0015] Certain aspects provide an apparatus for wireless communications by a user equipment (UE). The apparatus generally includes means for receiving transmission configuration indication (TCI) state information for communications via a plurality of bandwidth parts (BWPs). The TCI state information may indicate at least a first and a second type of quasi co-location (QCL) assumptions. Additionally or alternatively, the apparatus may further include means for monitoring at least a first reference signal (RS) of at least one of the QCL assumption types in accordance with a BWP switching without requiring TCI state reconfiguration.

[0016] Certain aspects provide a non-transitory computer-readable medium for wireless communication by a user equipment (UE). The non-transitory computer-readable medium generally includes instructions that, when executed by at least one processor, cause the at least one processor to: receive transmission configuration indication (TCI) state information for communication via multiple bandwidth parts (BWPs). The TCI state information may indicate at least a first and a second type of quasi-co-location (QCL) assumptions. Additionally or alternatively, the non-transitory computer-readable medium may further include instructions that cause the at least one processor to: monitor at least a first reference signal (RS) of at least one of the QCL assumption types in accordance with a BWP switch without requiring TCI state reconfiguration.

[0017] To achieve the foregoing and related ends, one or more aspects include features fully described below and particularly pointed out in the claims. The following description and the accompanying drawings set forth in detail certain illustrative features of one or more aspects. However, these features are only indicative of several of the various ways in which the principles of the various aspects can be employed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to understand in detail the manner in which the above-stated features of the present disclosure are used, a more particular description of the content briefly summarized above may be made with reference to various aspects, some of which are illustrated in the accompanying drawings. It should be noted, however, that the accompanying drawings illustrate only certain typical aspects of the present disclosure and are not to be considered limiting of its scope, as the description may admit to other equally effective aspects.

[0019] Figure 1 is a block diagram conceptually illustrating an example telecommunications system in accordance with certain aspects of the present disclosure.

[0020] Figure 2 is a block diagram illustrating an example architecture of a distributed radio access network (RAN) in accordance with certain aspects of the present disclosure.

[0021] Figure 3 Illustrated are example transmission configuration indication (TCI) state configurations in accordance with certain aspects of the present disclosure.

[0022] Figure 4A is a flow diagram illustrating example operations for wireless communications by a network entity in accordance with certain aspects of the present disclosure.

[0023] Figure 4B is a flow diagram illustrating example operations for wireless communications by a user equipment (UE), in accordance with certain aspects of the present disclosure.

[0024] Figure 5 Communications devices that may include various components configured to perform operations of the techniques disclosed herein are illustrated in accordance with aspects of the present disclosure.

[0025] Figure 6 Communications devices that may include various components configured to perform operations of the techniques disclosed herein are illustrated in accordance with aspects of the present disclosure.

[0026] To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the figures. It is contemplated that elements disclosed in one aspect may be beneficially utilized in other aspects without specific recitation. DETAILED DESCRIPTION

[0027] Various aspects of the present disclosure provide techniques for avoiding transmission configuration indication (TCI) reselection due to bandwidth part (BWP) switching. For example, due to current limitations, often when the active BWP (e.g., which is used by a user equipment (UE)) containing a particular quasi-co-located (QCL) type of RS changes, the gNB must select a new TCI state for the UE. This can occur even if only the BWP ID parameter may change in the TCI state configuration information due to the change of the active BWP. This problem often leads to inefficiencies in resource usage in the network. One adverse consequence of TCI reselection includes the signaling overhead and power consumed by having to receive and decode additional signaling at the UE.

[0028] Thus, as mentioned, aspects of the present disclosure provide techniques, apparatus, processing systems, and computer-readable media for avoiding TCI state reselection / reconfiguration. Although in some instances, the reselection / reconfiguration may be due to an active BWP switch, other states may also result in this behavior. Avoiding TCI state reselection and reconfiguration may result in reduced signaling overhead and power savings for communication devices (e.g., UEs and BSs).

[0029] The following description provides examples of techniques for avoiding TCI reselection (e.g., caused by BWP switching), without limiting the scope, applicability, or examples set forth in the claims. Changes may be made to the functions and arrangements of the elements discussed without departing from the scope of the present disclosure. Various examples may appropriately omit, replace, or add various procedures or components. For example, the described method may be performed in an order different from the order described, and various steps may be added, omitted, or combined. Moreover, the features described with reference to some examples may be combined in some other examples. For example, any number of aspects set forth herein may be used to implement an apparatus or practice method. In addition, the scope of the present disclosure is intended to cover such equipment or methods practiced using other structures, functionalities, or structures and functionalities as supplements to the various aspects of the present disclosure set forth herein or in addition. It should be understood that any aspect of the present disclosure disclosed herein may be implemented by one or more elements of the claims. The wording "exemplary" is used herein to mean "used as an example, instance, or explanation". Any aspect described herein as "exemplary" need not be interpreted as being superior to or superior to other aspects.

[0030] In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a specific radio access technology (RAT) and may operate on one or more frequencies. RAT may also be referred to as radio technology, air interface, etc. Frequency may also be referred to as carrier, subcarrier, frequency channel, frequency modulation, subband, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

[0031] The techniques described herein can be used for various wireless networks and radio technologies. For clarity, although various aspects may be described herein using terms commonly associated with 3G, 4G and / or 5G New Radio (NR) wireless technologies, various aspects of the present disclosure may be applied in communication systems based on other generations, including later generations of technologies.

[0032] NR may utilize orthogonal frequency division multiplexing (OFDM) on the downlink and / or uplink and single carrier frequency division multiplexing (SC-FDM) on the uplink and / or downlink. NR may support half-duplex operation using time division duplex (TDD). OFDM and SC-FDM divide the system bandwidth into multiple orthogonal subcarriers, which are called frequency modulations, frequency bins, etc. Each subcarrier may be modulated with data. Modulation symbols may be sent in the frequency domain under OFDM and in the time domain under SC-FDM. The spacing between adjacent subcarriers may be fixed, and the total number of subcarriers may depend on the system bandwidth. For example, the base subcarrier spacing (SCS) may be 15kHz, and other SCSs (e.g., 30kHz, 60kHz, 120kHz, 240kHz, etc.) may be defined relative to the base SCS. The minimum resource allocation (e.g., resource block (RB)) may be 12 consecutive subcarriers (or 180kHz). The system bandwidth may also be divided into subbands covering multiple RBs. In NR, a subframe is 1 ms, but the basic transmission time interval (TTI) is called a slot. A subframe contains a variable number of slots (e.g., 1, 2, 4, 8, 16, ... slots), depending on the SCS. Symbols, slot lengths, and CP scale with the SCS.

[0033] NR may support beamforming and may dynamically configure beam directions. Multiple-input multiple-output (MIMO) transmissions with precoding may also be supported. In some examples, MIMO configurations in the DL may support up to 8 transmit antennas (with multi-layer DL transmissions of up to 8 streams) and up to 2 streams per UE. In some examples, multi-layer transmissions of up to 2 streams per UE may be supported. Aggregation of multiple cells may be supported using up to 8 serving cells.

[0034] Figure 1An example wireless communication network 100 is illustrated in which aspects of the present disclosure may be performed. For example, the wireless communication network 100 may be a NR system (e.g., a 5G NR network). Figure 1 As shown, the wireless communication network 100 may be in communication with a core network 132. The core network 132 may be in communication with one or more base stations (BSs) 110 and / or user equipments (UEs) 120 in the wireless communication network 100 via one or more interfaces.

[0035] like Figure 1 As illustrated in , the wireless communication network 100 may include several BSs 110a-z (each also individually referred to herein as BS 110 or collectively referred to as BS 110) and other network entities. BS 110 may provide communication coverage for a specific geographic area (sometimes referred to as a "cell"), which may be stationary or mobile depending on the location of the mobile BS 110. In some examples, BS 110 may be interconnected to each other and / or to one or more other BSs or network nodes (not shown) in the wireless communication network 100 using any suitable transport network via various types of backhaul interfaces (e.g., direct physical connections, wireless connections, virtual networks, etc.). Figure 1 In the example shown in , BSs 110a, 110b, and 110c may be macro BSs for macro cells 102a, 102b, and 102c, respectively. BS 110x may be a pico BS for pico cell 102x. BSs 110y and 110z may be femto BSs for femto cells 102y and 102z, respectively. A BS may support one or more cells. A network controller 130 may be coupled to a set of BSs 110 and provide coordination and control (e.g., via a backhaul) for these BSs 110.

[0036] BS 110 communicates with UEs 120a-y (each also individually referred to herein as UE 120 or collectively referred to as UE 120) in the wireless communication network 100. UEs 120 (e.g., 120x, 120y, etc.) may be dispersed throughout the wireless communication network 100, and each UE 120 may be stationary or mobile. The wireless communication network 100 may also include a relay station (e.g., relay station 110r) (also referred to as a relay, etc.) that receives transmissions of data and / or other information from an upstream station (e.g., BS 110a or UE 120r) and sends transmissions of data and / or other information to a downstream station (e.g., UE 120 or BS 110), or that relays transmissions between UEs 120 to facilitate communication between the devices.

[0037] According to certain aspects, BS 110 and UE 120 may be configured to avoid transmission configuration indication (TCI) reselection. In some instances, this reselection may be caused by bandwidth part switching. Figure 1 As shown in FIG. 1 , BS 110a includes a TCI module 112. According to aspects of the present disclosure, the TCI module 112 may be configured to perform Figure 4A The operations described in one or more of and other operations disclosed herein for avoiding TCI reselection caused by bandwidth part switching. Additionally, as Figure 1 As shown in FIG. 1 , UE 120a includes a TCI module 122. According to aspects of the present disclosure, the TCI module 122 may be configured to perform Figure 4B The operations explained in the and other operations disclosed herein for avoiding TCI reselection caused by bandwidth partial switching.

[0038] Figure 2 1 and 120a (eg, in a BS 110a and a UE 120a) that can be used to implement various aspects of the present disclosure are illustrated. Figure 1 Example components of the wireless communication network 100).

[0039] At BS 110a, a transmit processor 220 may receive data from a data source 212 and control information from a controller / processor 240. The control information may be for a physical broadcast channel (PBCH), a physical control format indicator channel (PCFICH), a physical hybrid ARQ indicator channel (PHICH), a physical downlink control channel (PDCCH), a group common PDCCH (GC PDCCH), etc. The data may be for a physical downlink shared channel (PDSCH), etc. A medium access control (MAC)-control element (MAC-CE) is a MAC layer communication structure that may be used for control command exchange between wireless nodes. The MAC-CE may be carried in a shared channel such as a physical downlink shared channel (PDSCH), a physical uplink shared channel (PUSCH), or a physical sidelink shared channel (PSSCH).

[0040] The processor 220 may process (e.g., encode and symbol map) data and control information to obtain data symbols and control symbols, respectively. The transmit processor 220 may also generate reference symbols (such as for a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a channel state information reference signal (CSI-RS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, and / or reference symbols where applicable, and may provide an output symbol stream to a modulator (MOD) in a transceiver 232a-232t. Each modulator in the transceiver 232a-232t may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. Downlink signals from modulators 232a-232t in the transceiver may be transmitted via antennas 234a-234t, respectively.

[0041] At UE 120a, antennas 252a-252r may receive downlink signals from BS 110a and may provide received signals to demodulators (DEMODs) in transceivers 254a-254r, respectively. Each demodulator in transceivers 254a-254r may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples. Each demodulator may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. MIMO detector 256 may obtain received symbols from all demodulators in transceivers 254a-254r, perform MIMO detection on the received symbols where applicable, and provide detected symbols. Receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 120a to data sink 260, and provide decoded control information to controller / processor 280.

[0042] On the uplink, at the UE 120a, the transmit processor 264 may receive and process data from the data source 262 (e.g., for a physical uplink shared channel (PUSCH)) and control information from the controller / processor 280 (e.g., for a physical uplink control channel (PUCCH)). The transmit processor 264 may also generate reference symbols for reference signals (e.g., a sounding reference signal (SRS)). The symbols from the transmit processor 264 may be precoded by the TX MIMO processor 266, if applicable, further processed by modulators in the transceivers 254a-254r (e.g., for SC-FDM, etc.), and transmitted to the BS 110a. At the BS 110a, the uplink signal from the UE 120a may be received by the antenna 234, processed by the modulators in the transceivers 232a-232t, detected by the MIMO detector 236, if applicable, and further processed by the receive processor 238 to obtain decoded data and control information sent by the UE 120a. Receive processor 238 may provide decoded data to data sink 239 and decoded control information to controller / processor 240 .

[0043] Memories 242 and 282 may store data and program codes for BS 110a and UE 120a, respectively.A scheduler 244 may schedule UEs for data transmission on the downlink and / or uplink.

[0044] The antenna 252, processors 266, 258, 264 and / or controller / processor 280 of the UE 120a, and / or the antenna 234, processors 220, 230, 238 and / or controller / processor 240 of the BS 110a may be used to perform the various techniques and methods described herein. Figure 2 As shown, the controller / processor 240 of the BS 110a includes a TCI module 241, which can be configured to perform according to various aspects described herein. Figure 4A The operations described in one or more of and other operations disclosed herein for avoiding TCI reselection caused by bandwidth part switching. Figure 2 As shown, the controller / processor 280 of the UE 120a includes a TCI module 281, which can be configured to perform according to various aspects described herein. Figure 4B The operations described in one or more of and other operations disclosed herein for avoiding TCI reselection caused by bandwidth part switching. Although shown as being at the controller / processor, other components of UE 120a and BS 110a may also be used to perform the operations described herein.

[0045] Example Beam Instructions

[0046] Quasi co-location (QCL) signaling can be used for reference signals (RS) and channels across several communication scenarios. Some such scenarios may involve multiple cells, such as coordinated multi-point (CoMP) scenarios. CoMP communications typically involve multiple transmit receive points (TRPs) with integrated access and backhaul (IAB) nodes, each of which has its own cell identity (ID).

[0047] The QCL assumption generally refers to the assumption that, for a set of signals or channels that are considered to be 'QCL-related' (or simply "QCL'd"), certain characteristics derived (measured) for one of the signals or channels also apply to the other signals or channels. That is, when the characteristics associated with one channel or signal are applied to another signal channel or signal, these channels and / or signals may be referred to as QCL'd. As an example, if the PDSCH DMRS is QCL'd with other DL RSs, the UE may process the PDSCH based on measurements of the other DL RSs. In some cases, this may result in more efficient processing, allowing the UE to use (reuse) previous measurements of the QCL'd RSs, which may speed up processing of the current channel.

[0048] In some cases, the QCL assumptions for reception / transmission of signals and channels may be signaled via a mechanism called a transmission configuration indication (TCI) state. TCI states may also sometimes be referred to as transmission configuration indicator states. In some cases, a UE may be configured to have multiple TCI states via radio resource control (RRC) signaling, and one of the TCI states may be indicated by an N-bit (e.g., 3-bit) DCI field for PDSCH. A field in an RRC message (e.g., qcl-info (qcl-information)) may list references to TCI states for providing QCL sources and QCL types for associated resources. TCI states may be indicated by an ID (e.g., TCI-StateId). An RRC message (e.g., PDSCH-Config field) may include a field with a TCI state list indicating a transmission configuration, which includes a QCL relationship between a DL RS in an RS set and a PDSCH DMR port. The TCI state associates a DL RS (e.g., one or two) with a corresponding QCL type. The DL BWP and cell where the RS is located may also be indicated.

[0049] Figure 3An example of how RS associated with TCI state can be configured via RRC signaling is explained. QCL assumptions can be grouped into different types, which correspond to parameters that can be assumed to be QCL'd for a QCL'd signal set. For example, for a QCL'd signal set, type A can indicate Doppler shift, Doppler spread, average delay, and delay spread can be assumed to be QCL'd, while type B can indicate only Doppler shift and Doppler spread, and type C can indicate another different set of parameters, such as average delay and Doppler shift. In some cases, spatial QCL assumptions (e.g., spatial TX / RX parameters) can be indicated by type D, for example. Spatial QCL may mean that a (Tx or Rx) beam selected based on a specific signal measurement can be applied to QCL-related signals. If at least spatial QCL is configured / indicated, an RRC field (e.g., tci-PresentInDCI (tci present in DCI) field) can indicate whether a TCI field is present in the DCI related to DL, and when this field is not present, the UE considers that TCI is not present / disabled.

[0050] In addition, if Figure 3 As illustrated, the TCI state may indicate one or more QCL'd RSs (e.g., CSI-RS, SSB, etc.) and associated QCL types. The TCI state may also indicate a ServCellIndex (serving cell index), which is a short identity used to identify a serving cell, such as a primary cell (PCell) or a secondary cell (Scell) in a carrier aggregation (CA) deployment. A value of 0 for this field may indicate a PCell, while a previously assigned SCellIndex may be applicable to an SCell.

[0051] In some examples, the UE may be configured with a list of up to M TCI states. The UE may be configured via higher layer parameters to decode the PDSCH based on a detected PDCCH with DCI intended for the UE and a given serving cell, where M depends on the UE capabilities. Each contains parameters for configuring the QCL relationship between one, two or more downlink RSs and DM-RS ports of the PDSCH. The QCL relationship may be configured by higher layer parameters for the first and second DL RSs, respectively. For the case of two DL RSs, the QCL assumption type may be different, regardless of whether the same DL RS or different DL RSs are referenced. The QCL assumption type corresponding to each DL RS is given by another higher layer parameter and may indicate QCL type A, QCL type B, QCL type C, or QCL type D.

[0052] In some downlink examples, the UE may receive an activation command (e.g., in a MAC-CE) that may be used to map one or more of the TCI states (e.g., up to 8 TCI states) configured by higher layers to code points of the TCI field in the DCI.

[0053] For uplink transmissions, spatial relation parameters may be used. The spatial relation parameters may configure the spatial relation between the reference RS (e.g., SSB, CSI-RS, and / or SRS) and the uplink transmission (e.g., PUCCH, PUSCH, SRS). A spatial relation set may be configured via higher layer signaling (e.g., RRC). MAC-CE may be used to select a subset of spatial relations (e.g., a single spatial relation). Based on the spatial relation, the UE may decide the UE transmit beam to be used for uplink transmission.

[0054] Example of avoiding TCI reselection due to active BWP switching

[0055] In certain networks, such as 5G New Radio (NR) networks, user equipment may communicate with the network via one or more cells (e.g., one or more serving cells) and using one or more component carriers (or carrier bandwidths). In 5G, each component carrier may be defined by one or more bandwidth parts (BWPs). In some cases, a bandwidth part may be viewed as a contiguous collection of physical resource blocks, selected from a contiguous subset of common resource blocks designed for given parameters on a given carrier. In some cases, a UE may be configured with up to four BWPs in the downlink (DL) and uplink (UL) of a given carrier.

[0056] Additionally, in some cases, only one BWP may be active at any given time with respect to a given carrier. For example, assuming that a UE is configured with four BWPs (BWP0, BWP1, BWP2, and BWP3), at a given time, only one of the four BWPs may be active while the other BWPs remain inactive. However, although only one BWP may be active at a time, the active BWP may switch to a different BWP. For example, assuming that BWP1 is the active BWP, the active BWP may switch to, for example, BWP2 or BWP3 based on certain criteria.

[0057] In some cases, a UE may be configured with a set of beam indication sets for communicating in one or more BWPs. For uplink transmissions, the beam indication set may be a spatial relationship. For downlink transmissions, the beam indication set may be a transmission configuration indication (TCI) state. The beam indication set may be configured for a specific channel or transmission type. Some UEs may be configured with a beam indication set via higher layer signaling, such as radio resource control (RRC) signaling. In some examples, a subset of the configured set may be activated via a media access control control element (MAC-CE). In some examples, an indication in a downlink control information (DCI) may indicate (e.g., via a 3-bit indicator) one of the beam indications for a transmission scheduled by the DCI. The indicated TCI state or spatial relationship may indicate to the UE, respectively, the receive beam or transmit beam to be used.

[0058] As mentioned above, the TCI state may indicate one or more quasi co-location (QCL) assumptions for reception / transmission of signals and channels. QCL assumptions may be grouped into different types. For example, some types may have characteristics corresponding to one or more parameters that may be assumed to be QCL'd with respect to a QCL'd counterpart (e.g., a channel, a signal, etc.). As mentioned above, example different QCL assumption types may include Type A, Type B, Type C, and Type D.

[0059] In 5G Release 15, for a specific TCI state, QCL Type A and Type B reference signals (RS) must be in the active BWP on the serving cell of the UE in which the TCI state is configured. However, QCL Type C and Type D RS can be in the active BWP of a serving cell different from the serving cell in which the TCI state is configured.

[0060] For example, assume that a UE communicates with a first cell on a first component carrier and a second cell on a second component carrier, and wherein the TCI state is configured for the first cell. Furthermore, assume that for the first component carrier, the UE is configured with two BWPs (BWP0 and BWP1), wherein BWP0 is active, and for the second component carrier, the UE is configured with three BWPs (BWP0, BWP1, and BWP2). For QCL types A and B, type A and type B RSs must be transmitted within the active BWP1 of the first component carrier of the first cell in which the TCI state is configured. Since the TCI state is not configured for the second cell, type A and type B RSs may not be transmitted within the second component carrier. However, for QCL types C or D, RSs associated with these QCL assumption types may be within the first component carrier of the first cell (e.g., wherein the TCI state is configured) or within the second component carrier of the second cell (e.g., wherein the TCI state is configured).

[0061] Additionally, if the TCI state is configured and the RS includes a channel state information reference signal (CSI-RS), the BWP ID for the RS must also be configured, such as Figure 3 For example, Figure 3 As explained, the parameter BWP ID is conditional on the CSI-RS type RS. In other words, when the RS is a CSI-RS, the BWP ID for the CSI-RS must be configured in the TCI state.

[0062] The restriction / rule that the BWP ID must be configured for CSI RS poses a problem for QCL Type D CSI RS because if the active BWP containing Type D CSI-RS changes, the TCI state configuration needs to be changed, even if the active BWP containing Type A RS remains the same. For example, whenever the active BWP containing Type D RS (e.g., CSI-RS) changes, the gNB must select a new TCI state for the UE, even if the only difference in the TCI state configuration is the BWP ID of Type DRS in the TCI state. As a result, both the signaling overhead and the total number of configured TCI states increase, leading to inefficiencies in resource usage in the network, such as signaling overhead and power spent on having to receive and decode additional signaling.

[0063] Therefore, various aspects of the present disclosure provide techniques, apparatus, processing systems, and computer-readable media for avoiding TCI state reselection / reconfiguration caused by active BWP switching. Such techniques can be used to reduce signaling overhead and save power at the UE.

[0064] Figure 4A 4 is a flow diagram illustrating example operations 400A for wireless communication according to certain aspects of the present disclosure. Operations 400A may be performed, for example, by a network entity (such as, for example, BS 110 in wireless communication network 100). Operations 400A may be implemented as a processor (e.g., Figure 2 Further, the transmission of signals by the network entity (e.g., configuring the UE) and reception may be performed by, for example, one or more antennas (e.g., Figure 2 In some aspects, the transmission and / or reception of signals by a network entity may be implemented via a bus interface of one or more processors (e.g., controller / processor 240) that obtain and / or output signals. Although the call flows or operational descriptions herein may be described as certain actions as steps, the actions or steps described may be preferred in various arrangements or orders. By providing an example logical description, those skilled in the art will appreciate that various permutations are achievable and possible.

[0065] Operations 400A begin at 402A, where a network entity configures a UE with transmission configuration indication (TCI) state information for communication via a plurality of bandwidth parts (BWPs), wherein the TCI state information indicates at least a first and a second type of quasi co-location (QCL) assumptions. In some cases, configuring the UE with the TCI state information may include transmitting the TCI state information to the UE.

[0066] At 404A, the network entity determines whether to reconfigure the TCI state of the UE to reflect the BWP switching based on one or more rules defining BWP switching for a reference signal (RS) of at least one of the QCL assumption types without TCI state reconfiguration. In some cases, the BWP switching may include switching of an active BWP. Further, in some cases, the operation 400A may further include performing the BWP switching.

[0067] Figure 4B 4 is a flow diagram illustrating example operations 400A for wireless communication according to certain aspects of the present disclosure. Operations 400B may be performed, for example, by a network entity (such as, for example, UE 120 in wireless communication network 100). Operations 400B may be implemented as a process on one or more processors (e.g., Figure 2 Further, the transmission and reception of signals (e.g., configuration information) by the network entity may be performed, for example, by one or more antennas (e.g., Figure 2 In some aspects, the transmission and / or reception of signals by a network entity may be implemented via a bus interface of one or more processors (e.g., controller / processor 240) that obtain and / or output signals. As mentioned, although the call flows or operational descriptions herein may be described as certain actions as steps, the described actions or steps may be preferred in various arrangements or orders. By providing an example logical description, those skilled in the art will appreciate that various permutations are achievable and possible.

[0068] Operations 400B begin at 402B, where the UE receives transmission configuration indication (TCI) state information for communication via a plurality of bandwidth parts (BWPs), where the TCI state information indicates at least first and second types of quasi co-location (QCL) assumptions.

[0069] At 404B, the UE monitors at least a first reference signal (RS) of at least one of the QCL hypothesis types according to the BWP switching without TCI state reconfiguration. In some cases, operation 400B may further include performing BWP switching. Additionally, in some cases, the BWP switching may include switching of an active BWP.

[0070] As mentioned, in order to alleviate the TCI state configuration reselection problem caused by BWP ID during active BWP switching and for type D RS, the network may determine whether to reconfigure / reselect the TCI state based on one or more rules that define (e.g., allow) active BWP switching for RS of at least one of the QCL assumption types and without the need for TCI state reconfiguration.

[0071] For example, the first rule may involve allowing a BWP ID of an RS not to be specified in the TCI state configuration, thereby resulting in a "floating" BWP ID as described below. For example, in some cases, an active BWP switch may be from a first BWP ID (in which an RS of a first QCL assumption type is supported) to a second BWP ID. In this case, the first rule may allow a BWP ID of an RS not to be specified for the first QCL assumption type, so that the TCI state of the UE does not need to be reconfigured, thereby eliminating additional signaling overhead.

[0072] In some cases, the first rule may be applicable to QCL types AD and may be applicable when the RS type is CSI-RS. According to various aspects, when the BWP ID is left unspecified (e.g., left "floating"), the BWP ID of the RS may be assumed to be the BWP ID of the active BWP. For example, in some cases, the first rule may specify that the BWPID of the RS of the first QCL assumption type will be the second BWP ID after the active BWP switch. In this case, for example, based on the unspecified BWP ID, the UE may use the first BWP ID as the second BWP ID for monitoring. Therefore, the TCI state configuration may remain the same (i.e., the network node does not need to reconfigure the TCI state) even if the active BWP containing the RS (e.g., type D RS) changes, thereby reducing signaling overhead and power consumption at the UE. For example, when the BWP ID is left unspecified, determining whether to reconfigure the TCI state of the UE by the BS may include determining not to reconfigure the TCI state of the UE in response to the active BWP switch based at least in part on the fact that the first QCL assumption type is unspecified. Additionally, the UE may monitor the RS of the first QCL assumption type based on the unassigned BWP ID of the RS according to the active BWP switching without TCI state reconfiguration (eg, without having to decode and reconfigure new TCI state information).

[0073] According to various aspects, in some cases, a second rule applicable to QCL type AD may allow at least a BWP ID of a RS of a first QCL assumption type to be in an inactive BWP. For example, in some cases, an active BWP switch may be from a first BWPID (wherein an RS of a first QCL assumption type is supported) to a second BWP ID. Therefore, in this case, the BWP ID of the RS of the first QCL assumption type may remain unchanged as the first BWP ID after the active BWP switch, thereby allowing the TCI state of the UE to remain unchanged. In some cases, the BWP ID may be fixed within the TCI state configuration. Therefore, in this case, even when the active BWP switches, the BWP ID may remain a fixed BWP ID (i.e., the network node does not need to reconfigure the TCI state), thereby reducing signaling overhead and power consumption at the UE. For example, when the BWP ID of the RS is allowed to be in an inactive BWP, determining whether to reconfigure the TCI state of the UE by the BS may include determining not to reconfigure the TCI state of the UE in response to the active BWP switch based at least in part on the unchanged first BWP ID. Additionally, the UE may monitor the RS of the first QCL assumption type based on the unchanged first BWP ID (e.g., because the first QCL assumption type is allowed in the inactive BWP) according to the active BWP switching without TCI state reconfiguration (e.g., without having to decode and reconfigure new TCI state information).

[0074] According to various aspects, a third rule (which may be applicable to QCL Type C and Type D in some cases) may specify that the type of RS may not be an RS with an associated BWP ID. For example, in some cases, the active BWP switch may be from a first BWPID (wherein an RS of a first QCL assumption type is supported) to a second BWP ID. In this case, the third rule may specify that the RS of the first QCL assumption type is a specific type of RS that does not have an associated BWP ID, so the TCI state of the UE does not need to be reconfigured. For example, in some cases, the type of RS may be a synchronization signal block (SSB)-based RS, which may not have an associated BWP ID in the TCI state configuration (e.g., as Figure 3As explained). Therefore, in this case, the TCI state configuration can remain the same (i.e., the network node does not need to reconfigure the TCI state) even if the active BWP in the serving cell containing the RS changes, thereby reducing signaling overhead and power consumption at the UE. For example, determining whether to reconfigure the TCI state of the UE by the BS based at least in part on the specific type of RS without an associated BWP ID may include determining that the TCI state of the UE is to be reconfigured not in response to an active BWP switching. Additionally, the UE may monitor the RS of the first QCL assumption type according to the active BWP switching, for example, based on the specific type of RS without an associated BWP ID, without TCI state reconfiguration (e.g., without having to decode and reconfigure new TCI state information).

[0075] According to various aspects, a fourth rule (which may be applicable to QCL Type C and Type D in some cases) may specify that an active BWP containing a QCL RS must remain fixed (i.e., switching is not allowed). That is, for example, the fourth rule may prevent active BWP switching from an active BWP in which at least a first QCL assumption type of RS is supported. In this case, active BWP switching may be performed according to the fourth rule. Therefore, in this case, since the BWP ID of the RS is fixed, the TCI state configuration may remain the same (i.e., the network node does not need to reconfigure the TCI state), thereby reducing signaling overhead and power consumption at the UE. For example, the UE may monitor the RS of the first QCL assumption type according to the active BWP switching without TCI state reconfiguration (e.g., without having to decode and reconfigure new TCI state information).

[0076] Figure 5 A communication device 500 is illustrated that may include various components (eg, corresponding to means-plus-function components). One or more of these components may be configured to perform operations of the techniques disclosed herein, such as Figure 4A The communication device 500 includes a processing system 502 coupled to a transceiver 508. The transceiver 508 is configured to transmit and receive signals for the communication device 500 (such as, for example, various signals as described herein) via an antenna 510. The processing system 502 may be configured to perform processing functions for the communication device 500, including processing signals received and / or to be transmitted by the communication device 500.

[0077] The processing system 502 includes a processor 504 coupled to a computer readable medium / memory 512 via a bus 506. In some aspects, the computer readable medium / memory 512 is configured to store programs that, when executed by the processor 504, cause the processor 504 to execute Figure 4A, or instructions (e.g., computer executable code) for performing the operations illustrated in or other operations of the various techniques discussed herein for avoiding TCI reselection due to active BWP switching. In certain aspects, the computer-readable medium / memory 512 stores: code 514 for configuring a UE with transmission configuration indication (TCI) state information for communication via multiple bandwidth parts (BWPs), wherein the TCI state information indicates at least first and second types of quasi co-location (QCL) assumptions; code 516 for performing active BWP switching; and code 518 for determining whether to reconfigure the TCI state of the UE to reflect the active BWP switching based on one or more rules that allow reference signals (RS) for at least one of the QCL assumption types to be switched without TCI state reconfiguration. In certain aspects, the processor 504 includes a circuit system configured to implement the code stored in the computer-readable medium / memory 512. For example, processor 504 includes: a circuit system 520 for configuring a UE with transmission configuration indication (TCI) state information for communication via multiple bandwidth parts (BWPs), wherein the TCI state information indicates at least a first and a second type of quasi co-location (QCL) assumptions; a circuit system 522 for performing active BWP switching; and a circuit system 524 for determining whether to reconfigure the TCI state of the UE to reflect the active BWP switching based on one or more rules that allow active BWP switching for a reference signal (RS) for at least one of the QCL assumption types without requiring TCI state reconfiguration.

[0078] Figure 6 The description may include instructions configured to perform operations for the techniques disclosed herein (such as, Figure 4B 6. The communication device 600 includes a processing system 602 coupled to a transceiver 608. The transceiver 608 is configured to transmit and receive signals for the communication device 600 (such as, for example, various signals as described herein) via an antenna 610. The processing system 602 may be configured to perform processing functions for the communication device 600, including processing signals received and / or to be transmitted by the communication device 600.

[0079] The processing system 602 includes a processor 604 coupled to a computer readable medium / memory 612 via a bus 606. In some aspects, the computer readable medium / memory 612 is configured to store programs that, when executed by the processor 604, cause the processor 604 to execute Figure 4B, or instructions (e.g., computer executable code) for performing the operations illustrated in or other operations discussed herein for various techniques for avoiding TCI reselection due to active BWP switching. In some aspects, the computer-readable medium / memory 612 stores: code 614 for receiving transmission configuration indication (TCI) state information for communication via multiple bandwidth parts (BWPs), wherein the TCI state information indicates at least first and second types of quasi co-location (QCL) assumptions; code 616 for performing active BWP switching; and code 618 for monitoring at least a first reference signal (RS) of at least one of the QCL assumption types without TCI state reconfiguration based on the active BWP switching. In some aspects, the processor 604 includes circuitry configured to implement the code stored in the computer-readable medium / memory 612. For example, processor 604 includes: a circuit system 620 for receiving transmission configuration indication (TCI) state information for communication via multiple bandwidth parts (BWPs), wherein the TCI state information indicates at least first and second types of quasi co-location (QCL) assumptions; a circuit system 622 for performing active BWP switching; and a circuit system 624 for monitoring at least a first reference signal (RS) of at least one of the QCL assumption types based on the active BWP switching without requiring TCI state reconfiguration.

[0080] The techniques described herein may be used for various wireless communication technologies, such as NR (e.g., 5G NR), 3GPP Long Term Evolution (LTE), Advanced LTE (LTE-A), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), Time Division Synchronous Code Division Multiple Access (TD-SCDMA), and other networks. The terms "network" and "system" are often used interchangeably. A CDMA network may implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, and the like. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. cdma2000 covers IS-2000, IS-95, and IS-856 standards. A TDMA network may implement radio technologies such as Global System for Mobile Communications (GSM). OFDMA networks can implement radio technologies such as NR (e.g., 5G RA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are part of Universal Mobile Telecommunications System (UMTS). LTE and LTE-A are versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). cdma2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). NR is an emerging wireless communication technology under development.

[0081] In 3GPP, the term "cell" may refer to the coverage area of ​​a Node B (NB) and / or a NB subsystem serving the coverage area, depending on the context in which the term is used. In NR systems, the term "cell" and BS, next-generation Node B (gNB or g B Node), access point (AP), distributed unit (DU), carrier, or transmission reception point (TRP) may be used interchangeably. The BS may provide communication coverage for macro cells, pico cells, femto cells, and / or other types of cells. A macro cell may cover a relatively large geographic area (e.g., a radius of several thousand meters) and may allow unrestricted access by UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG), UEs of users in a residence, etc.). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS.

[0082] UE may also be referred to as a mobile station, terminal, access terminal, subscriber unit, station, customer premises equipment (CPE), cellular phone, smart phone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop computer, cordless phone, wireless local loop (WLL) station, tablet computer, camera, gaming device, netbook, smartbook, ultrabook, appliance, medical device or medical equipment, biometric sensor / device, wearable device (such as smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet, etc.)), entertainment device (e.g., music device, video device, satellite radio, etc.), transportation component or sensor, smart meter / sensor, industrial manufacturing equipment, global positioning system device, or any other suitable device configured to communicate via wireless or wired medium. Some UEs may be considered machine type communication (MTC) devices or evolved MTC (eMTC) devices. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which can communicate with a BS, another device (e.g., a remote device), or some other entity. A wireless node can provide connectivity for or to a network (e.g., a wide area network (such as the Internet) or a cellular network), for example, via a wired or wireless communication link. Some UEs may be considered Internet of Things (IoT) devices, which may be narrowband IoT (NB-IoT) devices.

[0083] In some examples, access to the air interface may be scheduled. A scheduling entity (e.g., BS) allocates resources for communication between some or all devices and equipment within its service area or cell. A scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communications, subordinate entities utilize resources allocated by the scheduling entity. A base station is not the only entity that can be used as a scheduling entity. In some examples, a UE may be used as a scheduling entity, and resources for one or more subordinate entities (e.g., one or more other UEs) may be scheduled, and other UEs may use resources scheduled by the UE for wireless communications. In some examples, a UE may act as a scheduling entity in a peer-to-peer (P2P) network and / or in a mesh network. In a mesh network example, UEs may communicate directly with each other in addition to communicating with a scheduling entity.

[0084] Each method disclosed herein includes one or more steps or actions for implementing the method. These method steps and / or actions can be interchangeable with each other without departing from the scope of the claims. In other words, unless a specific order of steps or actions is specified, the order and / or use of specific steps and / or actions can be changed without departing from the scope of the claims.

[0085] As used herein, a phrase referring to "at least one" of a list of items refers to any combination of those items, including single members. As an example, "at least one of a, b, or c" is intended to cover: a, b, c, ab, ac, bc, and abc, as well as any combination with multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0086] As used herein, the term "determining" encompasses a wide variety of actions. For example, "determining" may include calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, a database, or another data structure), ascertaining, and the like. Also, "determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), and the like. Also, "determining" may include resolving, selecting, choosing, establishing, and the like.

[0087] The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the universal principles defined herein may be applied to other aspects. Thus, the claims are not intended to be limited to the various aspects shown herein, but should be granted the full scope consistent with the language of the claims, wherein the singular reference to the element is not intended to mean "there is and only one" (unless specifically stated) but "one or more". Unless specifically stated otherwise, the term "some / some" refers to one or more. The elements of the various aspects described throughout this disclosure are all structural and functional equivalents currently or hereafter known to those of ordinary skill in the art and are expressly incorporated herein by reference, and are intended to be covered by the claims. In addition, nothing disclosed herein is intended to be donated to the public, regardless of whether such disclosure is explicitly recorded in the claims. No element of a claim should be interpreted under the provisions of 35 U.S.C. §112 (f), unless the element is explicitly stated using the phrase "device for..." or in the case of a method claim, the element is stated using the phrase "step for...".

[0088] The various operations of the methods described above may be performed by any suitable device capable of performing the corresponding functions. These devices may include various hardware and / or software components and / or modules, including but not limited to circuits, application specific integrated circuits (ASICs), or processors. Generally, where there are operations illustrated in the accompanying drawings, these operations may have corresponding paired device-plus-function components with similar numbers.

[0089] The various illustrative logical blocks, modules, and circuits described in conjunction with the present disclosure may be implemented or executed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0090] If implemented in hardware, an example hardware configuration may include a processing system in a wireless node. The processing system may be implemented using a bus architecture. Depending on the specific application and overall design constraints of the processing system, the bus may include any number of interconnecting buses and bridges. The bus may link together various circuits including a processor, a machine-readable medium, and a bus interface. The bus interface may be used to connect a network adapter, etc., to the processing system via the bus. The network adapter may be used to implement the signal processing functions of the PHY layer. In a user terminal (see Figure 1 ), a user interface (e.g., a keypad, display, mouse, joystick, etc.) may also be connected to the bus. The bus may also link various other circuits, such as timing sources, peripherals, voltage regulators, power management circuits, and the like, which are well known in the art and will not be described further. The processor may be implemented with one or more general and / or special purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuit systems capable of executing software. Those skilled in the art will recognize how to best implement the functionality described with respect to the processing system, depending on the specific application and the overall design constraints imposed on the overall system.

[0091] If implemented in software, each function may be stored on or transmitted by a computer-readable medium as one or more instructions or codes. Software should be broadly interpreted to mean instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or other. Computer-readable media include both computer storage media and communication media, which include any media that facilitate the transfer of computer programs from one place to another. The processor may be responsible for managing the bus and general processing, including executing software modules stored on a machine-readable storage medium. A computer-readable storage medium may be coupled to a processor so that the processor can read and write information from / to the storage medium. In an alternative, a storage medium may be integrated into a processor. As an example, a machine-readable medium may include a transmission line, a carrier modulated by data, and / or a computer-readable storage medium having instructions stored thereon that is separated from a wireless node, all of which may be accessed by a processor through a bus interface. Alternatively or additionally, a machine-readable medium or any part thereof may be integrated into a processor, such as a cache and / or a general register file, which may be the case. As an example, examples of machine-readable storage media may include RAM (random access memory), flash memory, ROM (read only memory), PROM (programmable read only memory), EPROM (erasable programmable read only memory), EEPROM (electrically erasable programmable read only memory), registers, magnetic disks, optical disks, hard drives, or any other suitable storage media, or any combination thereof. Machine-readable media may be implemented in a computer program product.

[0092] A software module may include a single instruction, or many instructions, and may be distributed over several different code segments, between different programs, and across multiple storage media. A computer-readable medium may include several software modules. These software modules include instructions that cause a processing system to perform various functions when executed by a device (such as a processor). These software modules may include a transmission module and a receiving module. Each software module may reside in a single storage device or may be distributed across multiple storage devices. As an example, when a triggering event occurs, a software module may be loaded into a RAM from a hard drive. During the execution of the software module, the processor may load some instructions into a cache to increase access speed. One or more cache lines may then be loaded into a general register file for execution by the processor. When describing the functionality of a software module as described below, it will be understood that such functionality is implemented by the processor when the processor executes instructions from the software module.

[0093] Any connection is also properly referred to as a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technology (such as infrared (IR), radio, and microwave), then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technology (such as infrared, radio, and microwave) is included in the definition of medium. Disk and disc, as used herein, include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Wherein disks often reproduce data magnetically, while discs use lasers to reproduce data optically. Therefore, in some aspects, computer-readable media may include non-transient computer-readable media (e.g., tangible media). In addition, for other aspects, computer-readable media may include transient computer-readable media (e.g., signals). The above combinations should also be included in the scope of computer-readable media.

[0094] Thus, certain aspects may include a computer program product for performing the operations presented herein. For example, such a computer program product may include a computer-readable medium having stored (and / or encoded) thereon instructions that can be executed by one or more processors to perform the operations described herein, such as for performing the operations described herein and in Figure 4A and 4B Instructions for the operations explained in .

[0095] In addition, it should be appreciated that modules and / or other appropriate means for performing the methods and techniques described herein may be downloaded and / or otherwise obtained by a user terminal and / or base station where applicable. For example, such a device can be coupled to a server to facilitate the transfer of means for performing the methods described herein. Alternatively, the various methods described herein can be provided via a storage device (e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or a floppy disk, etc.) so that once the storage device is coupled to or provided to a user terminal and / or base station, the device can obtain the various methods. In addition, any other suitable technology suitable for providing the methods and techniques described herein to a device may be utilized.

[0096] It will be understood that the claims are not limited to the precise configuration and components illustrated above. Various changes, substitutions and variations may be made in the arrangement, operation and details of the methods and apparatus described above without departing from the scope of the claims.

Claims

1. A first network entity for wireless communication, comprising: Communication interface; as well as one or more processors coupled to the communication interface, wherein the first network entity is configured to: Configuring a second network entity with transmission configuration indication TCI state information for communication, wherein the TCI state information indicates a quasi co-location QCL type assumption; as well as The one or more RSs of the QCL type assumption are transmitted based on a rule that allows a bandwidth part BWP identifier ID of a corresponding RS in the one or more reference signals RS to be unspecified in the TCI state information.

2. The first network entity of claim 1, wherein the first network entity is configured not to reconfigure a TCI state of the second network entity based on the BWP ID of the corresponding RS not being assigned.

3. The first network entity of claim 1, wherein the rule allows the BWP ID of the corresponding RS to be in an inactive BWP.

4. The first network entity of claim 1, wherein the first network entity is configured not to reconfigure a TCI state of the second network entity based on the corresponding RS not having an associated BWP ID.

5. The first network entity of claim 4, wherein the corresponding RS comprises a synchronization signal block (SSB)-based RS.

6. A wireless communication method performed by a first network entity, comprising: Configuring a second network entity with transmission configuration indication TCI state information for communication, wherein the TCI state information indicates a quasi co-location QCL type assumption; as well as The one or more RSs of the QCL type assumption are transmitted based on a rule that allows a bandwidth part BWP identifier ID of a corresponding RS in the one or more reference signals RS to be unspecified in the TCI state information.

7. The method of claim 6, further comprising: The TCI state of the second network entity is not reconfigured based on that the BWP ID of the corresponding RS is not specified.

8. The method of claim 6, wherein the rule allows the BWP ID of the corresponding RS to be in an inactive BWP.

9. The method of claim 6, further comprising: The TCI state of the second network entity is not reconfigured based on the corresponding RS not having an associated BWP ID.

10. The method of claim 9, wherein the corresponding RS comprises a synchronization signal block (SSB)-based RS.

11. A first network entity for wireless communication, comprising: Communication interface; as well as one or more processors coupled to the communication interface, wherein the first network entity is configured to: receiving transmission configuration indication (TCI) state information from a second network entity for communication, wherein the TCI state information indicates a quasi co-location (QCL) type assumption; as well as The one or more reference signals RS of the QCL type assumption are received based on a rule that allows a bandwidth part BWP identifier ID of a corresponding RS in the one or more reference signals RS to be unspecified in the TCI state information.

12. The first network entity of claim 11, wherein the first network entity is configured to determine not to reconfigure a TCI state based on that the BWP ID of the corresponding RS is not assigned.

13. The first network entity of claim 11, wherein the rule allows the BWP ID of the corresponding RS to be in an inactive BWP.

14. The first network entity of claim 11, wherein the first network entity is configured to determine not to reconfigure the TCI based on the corresponding RS not having an associated BWP ID.

15. The first network entity of claim 14, wherein the corresponding RS comprises a synchronization signal block (SSB)-based RS.

16. A wireless communication method performed by a first network entity, comprising: receiving transmission configuration indication (TCI) state information from a second network entity for communication, wherein the TCI state information indicates a quasi co-location (QCL) type assumption; as well as The one or more RSs of the QCL type assumption are received based on a rule that allows a bandwidth part BWP identifier ID of a corresponding RS in the one or more reference signals RS to be unspecified in the TCI state information.

17. The method of claim 16, further comprising: The determination not to reconfigure the TCI state is based on that the BWP ID of the corresponding RS is not specified.

18. The method of claim 16, wherein the rule allows the BWP ID of the corresponding RS to be in an inactive BWP.

19. The method of claim 16, further comprising: The determination not to reconfigure the TCI state is based on the corresponding RS not having an associated BWP ID.

20. The method of claim 19, wherein the corresponding RS comprises a synchronization signal block (SSB)-based RS.

21. A non-transitory computer-readable medium having code stored thereon, which, when executed by at least one processor of a first network entity, causes the first network entity to: configuring the second network entity with transmission configuration indication (TCI) state information for communication, wherein the TCI state information indicates a quasi co-location (QCL) type assumption; and The one or more RSs of the QCL type assumption are transmitted based on a rule that allows a bandwidth part BWP identifier ID of a corresponding RS in the one or more reference signals RS to be unspecified in the TCI state information.

22. The non-transitory computer-readable medium of claim 21, wherein the code, when executed by the at least one processor of the first network entity, causes the first network entity to not reconfigure the TCI state of the second network entity based on the BWP ID of the corresponding RS being unassigned.

23. The non-transitory computer-readable medium of claim 21, wherein the rule allows the BWP ID of the corresponding RS to be in an inactive BWP.

24. The non-transitory computer-readable medium of claim 21, wherein the code, when executed by the at least one processor of the first network entity, causes the first network entity to not reconfigure a TCI state of the second network entity based on the corresponding RS not having an associated BWP ID.

25. The non-transitory computer-readable medium of claim 24, wherein the corresponding RS comprises a synchronization signal block (SSB)-based RS.

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