Techniques for recovering from dual connectivity data stalls

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may receive a first packet having a first sequence number via a first connection of a dual connectivity mode. The UE may receive a second packet having a second sequence number via a second connection of the dual connectivity mode. The UE may determine, at least in part based on the first sequence number and the second sequence number, that the first packet is received out of sequence. The UE may maintain a packet order for receiving subsequent packets via the first connection or the second connection. The UE may discard the first packet based, at least in part, on determining that the first packet is received out of sequence. Numerous other aspects are provided.

Description

[0001] Public domain

[0002] Aspects of the present disclosure relate generally to wireless communications and to techniques and apparatus for recovering from dual connectivity data stalls.

[0003] background

[0004] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include 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, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

[0005] A wireless network may include several base stations (BSs) that can support communication of several user equipments (UEs). User equipments (UEs) may communicate with base stations (BSs) via downlinks and uplinks. Downlinks (or forward links) refer to the communication link from a BS to a UE, while uplinks (or reverse links) refer to the communication link from a UE to a BS. As will be described in more detail herein, a BS may be referred to as a Node B, gNB, access point (AP), radio head, transmit receive point (TRP), new radio (NR) BS, 5G Node B, and the like.

[0006] The above multiple access technologies have been adopted in various telecommunication standards to provide common protocols that enable different user equipment to communicate at city, country, region, and even global levels. New Radio (NR) (which may also be referred to as 5G) is an enhancement set to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP). NR is designed to better support mobile broadband Internet access by using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with cyclic prefix (CP) on the downlink (DL), using CP-OFDM and / or SC-FDM (e.g., also referred to as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), and supporting beamforming, multiple input multiple output (MIMO) antenna technology and carrier aggregation to improve spectrum efficiency, reduce costs, improve services, utilize new spectrum, and better integrate with other open standards. As the demand for mobile broadband access continues to grow, further improvements to LTE, NR and other radio access technologies are still useful.

[0007] Overview

[0008] In some aspects, a wireless communication method performed by a user equipment (UE) includes: receiving a first packet with a first sequence number via a first connection of a dual connectivity mode; receiving a second packet with a second sequence number via a second connection of the dual connectivity mode; determining that the first packet is received out of sequence based at least in part on the first sequence number and the second sequence number; maintaining a packet order for receiving subsequent packets via the first connection or the second connection; and discarding the first packet based at least in part on determining that the first packet is received out of sequence.

[0009] In some aspects, determining that the first packet was received out of sequence includes determining a first value of a first hyperframe number (HFN) counter associated with the first connection, determining a second value of a second HFN counter associated with the second connection, determining the first value via a HFN decryption associated with the first HFN counter, and determining the second value via a HFN decryption associated with the second HFN counter.

[0010] In some aspects, the method includes determining to discard the first packet based at least in part on the first value being a valid HFN number and to maintain packet order for receiving subsequent packets.

[0011] In some aspects, the method includes determining that the first packet is a stale packet based at least in part on the first sequence number and the second sequence number.

[0012] In some aspects, maintaining the order of packets for receiving subsequent packets includes maintaining a receive window for receiving subsequent packets.

[0013] In some aspects, the first connection is associated with a first radio access technology (RAT) and the second connection is associated with a second RAT different from the first RAT.

[0014] In some aspects, the first connection is associated with a first frequency bandwidth and the second connection is associated with a second frequency bandwidth different from the first frequency bandwidth.

[0015] In some aspects, determining that the first packet was received out of sequence is based at least in part on the first sequence number and the second sequence number satisfying a sequence number threshold.

[0016] In some aspects, a wireless communication method performed by a UE includes: receiving a first packet with a first sequence number via a first connection of a dual connectivity mode; receiving a second packet with a second sequence number via a second connection of the dual connectivity mode; determining that the first packet is received out of sequence based at least in part on the first sequence number and the second sequence number; and transmitting an indication of a radio link failure based at least in part on determining that the first packet is received out of sequence.

[0017] In some aspects, the method includes determining that a voice call is ongoing via the first connection or the second connection; and determining to transmit an indication of a radio link failure after the voice call ends.

[0018] In some aspects, the method includes determining a number of packets, including a first packet, that have been received out of sequence via a first connection; determining that the number of packets satisfies an out-of-sequence threshold; and determining to transmit an indication of a radio link failure based at least in part on the number satisfying the out-of-sequence threshold.

[0019] In some aspects, the method includes determining a number of transmissions of an indication of a radio link failure; determining that the number satisfies a radio link failure threshold; and determining to transmit an indication that the UE does not support dual connectivity.

[0020] In some aspects, the method includes determining a number of transmissions of an indication of a radio link failure; determining that the number satisfies a radio link failure threshold; and determining to omit measurement reporting for a dual connectivity second cell group cell add procedure.

[0021] In some aspects, the first connection is associated with a first RAT and the second connection is associated with a second RAT different from the first RAT.

[0022] In some aspects, the first connection is associated with a first frequency bandwidth and the second connection is associated with a second frequency bandwidth different from the first frequency bandwidth.

[0023] In some aspects, determining that the first packet was received out of sequence is based at least in part on the first sequence number and the second sequence number satisfying a sequence number threshold.

[0024] In some aspects, a UE for wireless communication includes a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: receive a first packet having a first sequence number via a first connection of a dual connectivity mode; receive a second packet having a second sequence number via a second connection of the dual connectivity mode; determine that the first packet is received out of sequence based at least in part on the first sequence number and the second sequence number; maintain a packet order for receiving subsequent packets via the first connection or the second connection; and discard the first packet based at least in part on determining that the first packet is received out of sequence.

[0025] In some aspects, determining that the first packet was received out of sequence includes determining a first value of a first HFN counter associated with the first connection, determining a second value of a second HFN counter associated with the second connection, determining the first value via a HFN decryption, and determining the second value via a HFN decryption associated with the second HFN counter.

[0026] In some aspects, the one or more processors are further configured to determine that the first packet is a stale packet based at least in part on the first sequence number and the second sequence number.

[0027] In some aspects, maintaining the order of packets for receiving subsequent packets includes maintaining a receive window for receiving subsequent packets.

[0028] In some aspects, the first connection is associated with a first RAT and the second connection is associated with a second RAT different from the first RAT.

[0029] In some aspects, the first connection is associated with a first frequency bandwidth and the second connection is associated with a second frequency bandwidth different from the first frequency bandwidth.

[0030] In some aspects, determining that the first packet was received out of sequence is based at least in part on the first sequence number and the second sequence number satisfying a sequence number threshold.

[0031] In some aspects, a UE for wireless communication includes a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors configured to: receive a first packet having a first sequence number via a first connection in a dual connectivity mode; receive a second packet having a second sequence number via a second connection in the dual connectivity mode; determine that the first packet is received out of sequence based at least in part on the first sequence number and the second sequence number; and transmit an indication of a radio link failure based at least in part on determining that the first packet is received out of sequence.

[0032] In some aspects, the one or more processors are further configured to determine that a voice call is in progress via the first connection or the second connection; and determine to transmit the indication of the radio link failure after the voice call ends.

[0033] In some aspects, the one or more processors are further configured to determine a number of packets, including the first packet, that have been received out of sequence via the first connection; determine that the number of packets satisfies an out-of-sequence threshold; and determine to transmit the indication of a radio link failure based at least in part on the number satisfying the out-of-sequence threshold.

[0034] In some aspects, the one or more processors are further configured to determine a number of transmissions of an indication of a radio link failure; determine that the number satisfies a radio link failure threshold; and determine to transmit an indication that the UE does not support dual connectivity.

[0035] In some aspects, the one or more processors are further configured to determine a number of transmissions of an indication of a radio link failure; determine that the number satisfies a radio link failure threshold; and determine to omit measurement reporting for a dual connectivity second cell group cell add procedure.

[0036] In some aspects, the first connection is associated with a first RAT and the second connection is associated with a second RAT different from the first RAT.

[0037] In some aspects, the first connection is associated with a first frequency bandwidth and the second connection is associated with a second frequency bandwidth different from the first frequency bandwidth.

[0038] In some aspects, determining that the first packet was received out of sequence is based at least in part on the first sequence number and the second sequence number satisfying a sequence number threshold.

[0039] In some aspects, a non-transitory computer-readable medium stores an instruction set for wireless communication, the instruction set including one or more instructions that, when executed by one or more processors of a UE, causes the UE to: receive a first packet having a first sequence number via a first connection in a dual connectivity mode; receive a second packet having a second sequence number via a second connection in the dual connectivity mode; determine, based at least in part on the first sequence number and the second sequence number, that the first packet is received out of sequence; maintain a packet order for receiving subsequent packets via the first connection or the second connection; and discard the first packet based at least in part on determining that the first packet is received out of sequence.

[0040] In some aspects, determining that the first packet was received out of sequence includes determining a first value of a first HFN counter associated with the first connection, determining a second value of a second HFN counter associated with the second connection, determining the first value via a HFN decryption, and determining the second value via a HFN decryption associated with the second HFN counter.

[0041] In some aspects, the one or more instructions further cause the UE to: determine that the first packet is a stale packet based at least in part on the first sequence number and the second sequence number.

[0042] In some aspects, maintaining the order of packets for receiving subsequent packets includes maintaining a receive window for receiving subsequent packets.

[0043] In some aspects, the first connection is associated with a first RAT and the second connection is associated with a second RAT different from the first RAT.

[0044] In some aspects, the first connection is associated with a first frequency bandwidth and the second connection is associated with a second frequency bandwidth different from the first frequency bandwidth.

[0045] In some aspects, determining that the first packet was received out of sequence is based at least in part on the first sequence number and the second sequence number satisfying a sequence number threshold.

[0046] In some aspects, a non-transitory computer-readable medium stores an instruction set for wireless communication, the instruction set including one or more instructions that, when executed by one or more processors of a UE, causes the UE to: receive a first packet having a first sequence number via a first connection in a dual connectivity mode; receive a second packet having a second sequence number via a second connection in the dual connectivity mode; determine that the first packet is received out of sequence based at least in part on the first sequence number and the second sequence number; and transmit an indication of a radio link failure based at least in part on determining that the first packet is received out of sequence.

[0047] In some aspects, the one or more instructions further cause the UE to: determine that a voice call is ongoing via the first connection or the second connection; and determine to transmit the indication of the radio link failure after the voice call ends.

[0048] In some aspects, the one or more instructions further cause the UE to: determine a number of packets, including the first packet, that have been received out of sequence via the first connection; determine that the number of packets satisfies an out-of-sequence threshold; and determine to transmit the indication of a radio link failure based at least in part on the number satisfying the out-of-sequence threshold.

[0049] In some aspects, the one or more instructions further cause the UE to: determine a number of transmissions of an indication of a radio link failure; determine that the number satisfies a radio link failure threshold; and determine to transmit an indication that the UE does not support dual connectivity.

[0050] In some aspects, the one or more instructions further cause the UE to: determine a number of transmissions of an indication of a radio link failure; determine that the number satisfies a radio link failure threshold; and determine to omit measurement reporting for a dual connectivity second cell group cell add procedure.

[0051] In some aspects, the first connection is associated with a first RAT and the second connection is associated with a second RAT different from the first RAT.

[0052] In some aspects, the first connection is associated with a first frequency bandwidth and the second connection is associated with a second frequency bandwidth different from the first frequency bandwidth.

[0053] In some aspects, determining that the first packet was received out of sequence is based at least in part on the first sequence number and the second sequence number satisfying a sequence number threshold.

[0054] In some aspects, an apparatus for wireless communication includes: a device for receiving a first packet having a first sequence number via a first connection of a dual connectivity mode; a device for receiving a second packet having a second sequence number via a second connection of the dual connectivity mode; a device for determining that the first packet was received out of sequence based at least in part on the first sequence number and the second sequence number; a device for maintaining a packet order for receiving subsequent packets via the first connection or the second connection; and a device for discarding the first packet based at least in part on determining that the first packet was received out of sequence.

[0055] In some aspects, means for determining that the first packet was received out of sequence includes: means for determining a first value of a first HFN counter associated with the first connection, means for determining a second value of a second HFN counter associated with the second connection, means for determining that the first value is decoded by HFN; and means for determining that the second value is decoded by HFN associated with the second HFN counter.

[0056] In some aspects, the apparatus includes means for determining that the first packet is a stale packet based at least in part on the first sequence number and the second sequence number.

[0057] In some aspects, means for maintaining an order of packets for receiving subsequent packets includes means for maintaining a receive window for receiving subsequent packets.

[0058] In some aspects, the first connection is associated with a first RAT and the second connection is associated with a second RAT different from the first RAT.

[0059] In some aspects, the first connection is associated with a first frequency bandwidth and the second connection is associated with a second frequency bandwidth different from the first frequency bandwidth.

[0060] In some aspects, determining that the first packet was received out of sequence is based at least in part on the first sequence number and the second sequence number satisfying a sequence number threshold.

[0061] In some aspects, an apparatus for wireless communication includes: a device for receiving a first packet having a first sequence number via a first connection of a dual connectivity mode; a device for receiving a second packet having a second sequence number via a second connection of the dual connectivity mode; a device for determining that the first packet is received out of sequence based at least in part on the first sequence number and the second sequence number; and a device for transmitting an indication of a radio link failure based at least in part on determining that the first packet is received out of sequence.

[0062] In some aspects, the apparatus includes means for determining that a voice call is ongoing via the first connection or the second connection; and means for determining to transmit the indication of radio link failure after the voice call ends.

[0063] In some aspects, the apparatus includes: means for determining a number of packets, including a first packet, that have been received out of sequence via a first connection; means for determining whether the number of packets satisfies an out-of-sequence threshold; and means for determining to transmit the indication of a radio link failure based at least in part on the number satisfying the out-of-sequence threshold.

[0064] In some aspects, the apparatus includes: means for determining a number of transmissions of an indication of a radio link failure; means for determining that the number satisfies a radio link failure threshold; and means for determining to transmit an indication that the apparatus does not support dual connectivity.

[0065] In some aspects, the apparatus includes means for determining a number of transmissions of an indication of a radio link failure; means for determining that the number satisfies a radio link failure threshold; and means for determining to omit measurement reporting for a dual connectivity second cell group cell add procedure.

[0066] In some aspects, the first connection is associated with a first RAT and the second connection is associated with a second RAT different from the first RAT.

[0067] In some aspects, the first connection is associated with a first frequency bandwidth and the second connection is associated with a second frequency bandwidth different from the first frequency bandwidth.

[0068] In some aspects, determining that the first packet was received out of sequence is based at least in part on the first sequence number and the second sequence number satisfying a sequence number threshold.

[0069] Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems as substantially described herein with reference to and as illustrated in the accompanying figures and specification.

[0070] The foregoing has broadly outlined the features and technical advantages of examples according to the present disclosure in an effort to make the following detailed description better understood. Additional features and advantages will be described hereinafter. The disclosed concepts and specific examples can be easily used as a basis for modifying or designing other structures for implementing the same purpose as the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, both in terms of their organization and method of operation, and the associated advantages will be better understood by considering the following description in conjunction with the accompanying drawings. Each of the accompanying drawings is provided for the purpose of illustration and description and is not intended to define limitations on the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] In order to understand the above-stated features of the present disclosure in detail, the above briefly summarized content may be described in more detail with reference to various aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that the accompanying drawings only illustrate certain typical aspects of the present disclosure and should not be considered to limit its scope, as the description may allow for other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0073] Figure 1 is a diagram illustrating an example of a wireless network in accordance with various aspects of the present disclosure.

[0074] Figure 2 is a diagram illustrating an example of a base station and a UE in communication in a wireless network according to various aspects of the present disclosure.

[0075] Figure 3 is a diagram illustrating an example of dual connectivity according to various aspects of the present disclosure.

[0076] Figure 4 and 5 is a diagram illustrating an example associated with recovering from dual connectivity data stalling in accordance with various aspects of the present disclosure.

[0077] Figure 6 and 7 is a diagram illustrating example processes associated with recovering from dual connectivity data stalling in accordance with various aspects of the present disclosure.

[0078] Figure 8 and Fig. 9 is a block diagram of an example device for wireless communications in accordance with various aspects of the present disclosure.

[0079] Detailed Description

[0080] The various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be implemented in many different forms and should not be interpreted as being limited to any specific structure or function given throughout the present disclosure. On the contrary, these aspects are provided to make the present disclosure thorough and complete, and it will fully convey the scope of the present disclosure to those skilled in the art. Based on the teachings of this article, those skilled in the art will appreciate that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether it is independently implemented or implemented in combination with any other aspect of the present disclosure. For example, any number of aspects set forth herein can be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such devices or methods practiced using supplements or other other structures, functionality, or structures and functionality as the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein can be implemented by one or more elements of the claims.

[0081] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0082] It should be noted that while various aspects may be described herein using terminology generally associated with 5G or NR radio access technologies (RATs), various aspects of the present disclosure may be applied to other RATs, such as 3G RATs, 4G RATs, and / or RATs after 5G (e.g., 6G).

[0083] Figure 1 1 is a diagram illustrating an example of a wireless network 100 according to various aspects of the present disclosure. The wireless network 100 may be a 5G (NR) network and / or an LTE network, etc. or may include elements thereof. The wireless network 100 may include several base stations 110 (shown as BS110a, BS110b, BS110c, and BS110d) and other network entities. A base station (BS) is an entity that communicates with a user equipment (UE) and may also be referred to as an NR BS, a B node, a gNB, a 5G B node (NB), an access point, a transmit receive point (TRP), etc. Each BS may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to a coverage area of ​​a BS and / or a BS subsystem serving the coverage area, depending on the context in which the term is used.

[0084] A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) 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)). 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. In Figure 1 In the example shown in , BS 110a may be a macro BS for macro cell 102a, BS 110b may be a pico BS for pico cell 102b, and BS 110c may be a femto BS for femto cell 102c. A BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "B node", "5G NB", and "cell" may be used interchangeably herein.

[0085] In some aspects, the cell may not necessarily be stationary, and the geographic area of ​​the cell may move depending on the location of the mobile BS. In some aspects, the BSs may be interconnected to each other and / or to one or more other BSs or network nodes (not shown) in the wireless network 100 via various types of backhaul interfaces, such as direct physical connections or virtual networks, using any suitable transport network.

[0086] The wireless network 100 may also include a relay station. A relay station is an entity that can receive transmissions of data from an upstream station (e.g., a BS or a UE) and send transmissions of the data to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that can relay transmissions for other UEs. Figure 1 In the example shown in , relay BS 110d may communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120d. A relay BS may also be referred to as a relay station, relay base station, relay, or the like.

[0087] The wireless network 100 may be a heterogeneous network including different types of BSs, such as a macro BS, a pico BS, a femto BS, a relay BS, etc. These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 5 to 40 watts), while a pico BS, a femto BS, and a relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

[0088] A network controller 130 may be coupled to a set of BSs and may provide coordination and control of these BSs. The network controller 130 may communicate with each BS via a backhaul. The BSs may also communicate with each other directly or indirectly, for example, via a wireless or wired backhaul.

[0089] UE 120 (e.g., 120a, 120b, 120c) may be dispersed throughout the wireless network 100, and each UE may be stationary or mobile. UE may also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. UE may be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biometric sensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0090] Some UEs may be considered as machine type communication (MTC) devices, or evolved or enhanced machine type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, and / or location tags, which may communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node may provide connectivity to 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 as Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband Internet of Things) devices. Some UEs may be considered as client equipment (CPE). UE 120 may be included inside a housing that houses components of UE 120, such as a processor component and / or a memory component. In some aspects, a processor component and a memory component may be coupled together. For example, a processor component (e.g., one or more processors) and a memory component (e.g., a memory) may be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0091] In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a specific 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, frequency channel, 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.

[0092] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly (e.g., without using base station 110 as an intermediary to communicate with each other) using one or more side link channels. For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols or vehicle-to-infrastructure (V2I) protocols), and / or mesh networks. In this case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by base station 110.

[0093] The devices of the wireless network 100 may communicate using an electromagnetic spectrum that may be subdivided into various categories, bands, channels, etc. based on frequency or wavelength. For example, the devices of the wireless network 100 may communicate using an operating band having a first frequency range (FR1) and / or may communicate using an operating band having a second frequency range (FR2), the first frequency range (FR1) may span 410 MHz to 7.125 GHz, and the second frequency range (FR2) may span 24.25 GHz to 52.6 GHz. Frequencies between FR1 and FR2 are sometimes referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to as a "sub-6 GHz band". Similarly, FR2 is often referred to as a "millimeter wave" band, although it is different from the extremely high frequency (EHF) band (30 GHz–300 GHz) identified as a "millimeter wave" band by the International Telecommunication Union (ITU). Thus, unless otherwise specifically stated, it should be understood that the term sub-"6 GHz" and the like, if used herein, may broadly refer to frequencies less than 6 GHz, frequencies within FR1, and / or mid-band frequencies (e.g., greater than 7.125 GHz). Similarly, unless otherwise specifically stated, it should be understood that the term "millimeter wave" and the like, if used herein, may broadly refer to frequencies within the EHF band, frequencies within FR2, and / or mid-band frequencies (e.g., less than 24.25 GHz). It is contemplated that the frequencies included in FR1 and FR2 may be modified, and that the techniques described herein are applicable to those modified frequency ranges.

[0094] As indicated above, Figure 1 are provided as examples. Other examples may differ from those described in Figure 1 Examples described.

[0095] Figure 2 is a diagram illustrating an example 200 of a base station 110 and a UE 120 in communication in a wireless network 100 in accordance with various aspects of the present disclosure. The base station 110 may be equipped with T antennas 234a through 234t and the UE 120 may be equipped with R antennas 252a through 252r, where in general T≥1 and R≥1.

[0096] At the base station 110, the transmit processor 220 may receive data for one or more UEs from the data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on a channel quality indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for the UE based at least in part on the MCS selected for each UE, and provide data symbols for all UEs. The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper layer signaling), and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS) or demodulation reference signals (DMRS)) and synchronization signals (e.g., primary synchronization signals (PSS) or secondary synchronization signals (SSS)). A transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, where applicable, and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively.

[0097] At UE 120, antennas 252a to 252r may receive downlink signals from base station 110 and / or other base stations and may provide received signals to demodulators (DEMODs) 254a to 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols where applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller / processor 280. The term "controller / processor" may refer to one or more controllers, one or more processors, or a combination thereof. The channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, and / or a channel quality indicator (CQI) parameter, etc. In some aspects, one or more components of the UE 120 may be included in the housing 284.

[0098] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in a core network. The network controller 130 may communicate with the base station 110 via the communication unit 294.

[0099] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI) from a controller / processor 280. The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266, where applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to the base station 110. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 254) of the UE 120 may be included in a modem of the UE 120. In some aspects, the UE 120 includes a transceiver. The transceiver may include any combination of antenna(s) 252, modulator and / or demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, and / or TX MIMO processor 266. The transceiver may be used by a processor (e.g., controller / processor 280) and memory 282 to perform aspects of any of the methods described herein, for example, as described with reference to Figure 4-7 as described.

[0100] At the base station 110, uplink signals from the UE 120 and other UEs may be received by the antenna 234, processed by the demodulator 232, detected by the MIMO detector 236 where applicable, and further processed by the receive processor 238 to obtain decoded data and control information sent by the UE 120. The receive processor 238 may provide the decoded data to the data sink 239 and the decoded control information to the controller / processor 240. The base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. The base station 110 may include a scheduler 246 to schedule the UE 120 for downlink and / or uplink communications. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 232) of the base station 110 may be included in a modem of the base station 110. In some aspects, the base station 110 includes a transceiver. The transceiver may include any combination of antenna(s) 234, modulator and / or demodulator 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to perform aspects of any of the methods described herein, for example, as described with reference to Figure 4-7 as described.

[0101] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component(s) of the base station 110 may perform one or more techniques associated with recovering from a dual connectivity data pause, as described in more detail elsewhere herein. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component of the Figure 6 The process of 600 Figure 7 , and / or operations of other processes as described herein. Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively. In some aspects, memory 242 and / or memory 282 may include: a non-transitory computer-readable medium storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, the one or more instructions, when executed (e.g., directly, or after compilation, conversion, and / or interpretation) by one or more processors of base station 110 and / or UE 120, may cause the one or more processors, UE 120, and / or base station 110 to perform or direct, for example Figure 6 The process of 600 Figure 7 In some aspects, executing instructions may include running instructions, converting instructions, compiling instructions, and / or interpreting instructions, etc.

[0102] In some aspects, the UE includes means for receiving a first packet having a first sequence number via a first connection of a dual connectivity mode; means for receiving a second packet having a second sequence number via a second connection of the dual connectivity mode; means for determining that the first packet was received out of sequence based at least in part on the first sequence number and the second sequence number; means for maintaining a packet order for receiving subsequent packets via the first connection or the second connection; or means for discarding the first packet based at least in part on determining that the first packet was received out of sequence. Means for the UE to perform operations described herein may include, for example, one or more of an antenna 252, a demodulator 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, a TX MIMO processor 266, a modulator 254, a controller / processor 280, or a memory 282.

[0103] In some aspects, the UE includes means for determining a first value of a first HFN counter associated with a first connection, means for determining a second value of a second HFN counter associated with a second connection, means for determining the first value is deciphered by a HFN associated with the first HFN counter, and means for determining the second value is deciphered by a HFN associated with the second HFN counter.

[0104] In some aspects, the UE includes means for determining to discard a first packet based at least in part on the first value being a valid HFN number and to maintain packet order for receiving subsequent packets.

[0105] In some aspects, the UE includes means for determining that the first packet is a stale packet based at least in part on the first sequence number and the second sequence number.

[0106] In some aspects, the UE includes means for maintaining a receive window for receiving subsequent packets.

[0107] In some aspects, the UE includes means for receiving a first packet having a first sequence number via a first connection of a dual connectivity mode; means for receiving a second packet having a second sequence number via a second connection of the dual connectivity mode; means for determining that the first packet was received out of sequence based at least in part on the first sequence number and the second sequence number; or means for transmitting an indication of a radio link failure based at least in part on determining that the first packet was received out of sequence. Means for the UE to perform operations described herein may include, for example, one or more of an antenna 252, a demodulator 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, a TX MIMO processor 266, a modulator 254, a controller / processor 280, or a memory 282.

[0108] In some aspects, the UE includes means for determining that a voice call is ongoing via the first connection or the second connection; or means for determining to transmit an indication of a radio link failure after the voice call ends.

[0109] In some aspects, the UE includes means for determining a number of packets, including a first packet, that have been received out of sequence via the first connection; means for determining that the number of packets satisfies an out-of-sequence threshold; or means for determining to transmit the indication of a radio link failure based at least in part on the number satisfying the out-of-sequence threshold.

[0110] In some aspects, the UE includes means for determining a number of transmissions of an indication of a radio link failure; means for determining that the number satisfies a radio link failure threshold; or means for determining to transmit an indication that the UE does not support dual connectivity.

[0111] In some aspects, the UE includes means for determining a number of transmissions of an indication of a radio link failure; means for determining that the number satisfies a radio link failure threshold; or means for determining to omit measurement reporting for a dual connectivity second cell group cell add procedure.

[0112] although Figure 2 The blocks in the 200 and 210 are illustrated as different components, but the functions described above with respect to these blocks may be implemented with a single hardware, software, or combined component or a combination of various components. For example, the functions described with respect to the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 may be performed by or under the control of the controller / processor 280.

[0113] As indicated above, Figure 2 are provided as examples. Other examples may differ from those described herein. Figure 2 Examples described.

[0114] Figure 3 is a diagram illustrating an example 300 of dual connectivity in accordance with various aspects of the present disclosure. Figure 3 The example shown in is for Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA)-NR Dual Connectivity (ENDC) mode. In ENDC mode, UE 120 communicates using LTE RAT on a primary cell group (MCG), and UE 120 communicates using NR RAT on a secondary cell group (SCG). However, the various aspects described herein may be applicable to ENDC mode (e.g., where the MCG is associated with the LTE RAT and the SCG is associated with the NR RAT), NR-E-UTRA Dual Connectivity (NEDC) mode (e.g., where the MCG is associated with the NR RAT and the SCG is associated with the LTE RAT), NR Dual Connectivity (NRDC) mode (e.g., where the MCG is associated with the NR RAT and the SCG is also associated with the NR RAT), or another dual connectivity mode (e.g., where the MCG is associated with the first RAT and the SCG is associated with one of the first RAT or the second RAT). ENDC mode is sometimes referred to as NR or 5G non-standalone (NSA) mode. Therefore, as used herein, dual connectivity mode may refer to an ENDC mode, a NEDC mode, an NRDC mode, and / or another type of dual connectivity mode.

[0115] like Figure 3As shown, UE 120 can communicate with both a first base station (e.g., eNB, 4G base station 110, gNB or 5G base station 110, etc.) and a second base station (e.g., eNB, 4G base station 110, gNB or 5G base station 110, etc.), and the first base station and the second base station can communicate with a 4G / LTE core network (e.g., directly or indirectly), which is shown as an evolved packet core (EPC) including a mobility management entity (MME), a packet data gateway (PGW), a serving gateway (SGW), etc. Figure 3 In the present invention, PGW and SGW are collectively referred to as P / SGW. In some aspects, the first base station and the second base station may be co-located at the same base station. In some aspects, the first base station and the second base station may be included in different base stations (e.g., may not be co-located).

[0116] like Figure 3 As further shown in , in some aspects, a wireless network that permits operation in 5G NSA mode may permit such operation by using an MCG for a first RAT (e.g., LTE RAT, 4G RAT, etc.) and an SCG for a second RAT (e.g., NR RAT, 5G RAT, etc.). In this case, UE 120 may communicate with the first base station via the MCG, and UE 120 may communicate with the second base station via the SCG. In some aspects, the MCG may anchor the network connection between UE 120 and the 4G / LTE core network (e.g., for mobility, coverage, control plane information, etc.), and the SCG may be added as an additional carrier to increase throughput (e.g., for data traffic, user plane information, etc.). In some aspects, the second base station and the first base station may not pass user plane information between each other. In some aspects, a UE 120 operating in dual connectivity mode may be concurrently connected to an LTE base station (e.g., an eNB) and an NR base station (e.g., a gNB) (e.g., in the case of ENDC or NEDC), or may be concurrently connected to one or more base stations 110 using the same RAT (e.g., in the case of NRDC). In some aspects, an MCG may be associated with a first frequency band (e.g., a sub-6 GHz band and / or a FR1 band), and an SCG may be associated with a second frequency band (e.g., a mmWave band and / or a FR2 band).

[0117] UE 120 may communicate via MCG and SCG using one or more radio bearers (e.g., data radio bearers (DRBs), signaling radio bearers (SRBs), etc.). For example, UE 120 may transmit or receive data via the MCG and / or SCG using one or more DRBs. Similarly, UE 120 may transmit or receive control information (e.g., radio resource control (RRC) information, measurement reports, etc.) using one or more SRBs. In some aspects, a radio bearer may be dedicated to a specific cell group (e.g., a radio bearer may be an MCG bearer, an SCG bearer, etc.). In some aspects, a radio bearer may be a split radio bearer. Split radio bearers may be split in the uplink and / or downlink. For example, a DRB may be split on the downlink (e.g., UE 120 may receive downlink information for an MCG or SCG in a DRB) but not split on the uplink (e.g., an uplink may not be split from a primary path to an MCG or SCG, such that UE 120 transmits in the uplink only on the primary path). In some aspects, the DRBs may be split on the uplink from the primary path to the MCG or SCG. The DRBs that are split in the uplink may use the primary path to transmit data until the size of the uplink transmit buffer meets the uplink data split threshold. If the uplink transmit buffer meets the uplink data split threshold, the UE 120 may use the DRBs to transmit data to the MCG or SCG.

[0118] As indicated above, Figure 3 are provided as examples. Other examples may differ from those described herein. Figure 3 Examples described.

[0119] In some networks, the UE may operate in dual connectivity mode. When in dual connectivity mode, the UE may communicate via a first connection (e.g., a first branch, a first radio link connection (RLC) physical branch, an MCG or an SCG, etc.) and a second connection (e.g., a second branch or a second RLC physical branch, etc.). In some dual connectivity modes, the first connection may operate using a first RAT and the second connection may operate using a second RAT. In some dual connectivity modes, the first connection may operate using a first bandwidth (e.g., a sub-6 GHz bandwidth) and the second connection may operate using a second bandwidth (e.g., a millimeter wave bandwidth).

[0120] The first connection may operate with a slower connection (e.g., lower bandwidth or higher latency, etc.). The second connection may operate with a faster connection (e.g., higher bandwidth or lower latency, etc.). The UE may receive one or more first packets associated with a first set of sequence numbers via the first connection, and may receive one or more second packets associated with a second set of sequence numbers via the second connection. Based at least in part on the first connection operating with a slower connection than the second connection, the first set of sequence numbers (e.g., when compared to the second set of sequence numbers) may indicate that one or more first packets are out of sequence with one or more second packets. This may trigger a data stall, such as a receive window update (e.g., adapting one or more first packets based at least in part on the first sequence number), which may cause the UE to discard (e.g., abandon) one or more second packets and / or one or more subsequent packets received via the second connection. Additionally or alternatively, the UE may cause a data stall, such as an update to a hyperframe number (HFN) based at least in part on the first sequence number, which may cause a reception error of subsequent packets received via the second connection. Based at least in part on the data stall, the UE may expend computational, network, communication, and / or power resources to detect and correct discarded packets and / or reception errors of subsequent packets.

[0121] In some aspects described herein, a UE may receive a first packet via a first connection of a dual connectivity mode. The first packet may have a first sequence number. The UE may receive a second packet via a second connection of the dual connectivity mode. The second packet may have a second sequence number. In some aspects, the UE may determine that the first packet is received out of sequence based at least in part on the first sequence number and the second sequence number.

[0122] In certain aspects, the UE may determine that the first packet is received out of sequence compared to the second packet based at least in part on the UE maintaining a first HFN counter associated with the first connection (e.g., the dual connectivity radio link connection (RLC) entity may maintain the first HFN counter) and at least in part on the UE maintaining a second HFN counter associated with the second connection (e.g., the dual connectivity RLC entity may maintain the second HFN counter). In some aspects, the UE may determine that the first packet is received in sequence with respect to data packets of the first connection based on the HFN counter, but determine that the first packet is received out of sequence compared to the second connection (e.g., the first packet is stale) based at least in part on the first sequence number.

[0123] In some aspects, based at least in part on determining that the first packet is in-sequence with respect to data packets of the first connection and out-of-sequence with respect to data packets of the second connection (e.g., the first packet is stale), the UE may discard the first packet (e.g., discard one or more additional packets of the first connection), and the UE may maintain packet order for receiving subsequent packets via the first connection and / or the second connection. In other words, the UE may not trigger a Packet Data Convergence Protocol (PDCP) reordering procedure.

[0124] In some aspects, based at least in part on determining that the first packet was received out of sequence, the UE may transmit an indication of a radio link failure. In some aspects, the UE may first determine whether a voice call (e.g., an LTE voice call or an NR voice call, etc.) is ongoing. Based at least in part on determining that the voice call is ongoing, the UE may determine to wait until the voice call ends before transmitting the indication of the radio link failure. In some aspects, the UE may transmit the indication of the radio link failure after determining that the number of packets received out of sequence via the first connection satisfies an out of sequence threshold.

[0125] In some aspects, the UE may determine that a number of transmissions of an indication of a radio link failure (e.g., based at least in part on packets of a first connection being received out of sequence compared to packets of a second connection) satisfies a radio link failure threshold. In some aspects, the UE may transmit an indication that the UE does not support dual connectivity and / or may determine to omit measurement reporting for a dual connectivity second cell group cell add procedure.

[0126] Based at least in part on discarding the first packet and maintaining the packet order for receiving subsequent packets and / or based at least in part on transmitting an indication of a radio link failure, the UE may continue to communicate via the second connection without updating the receive window or HFN to match stale packets of the first connection. In this way, the UE may save computing, network, communication, and / or power resources that might otherwise be used to detect and correct reception errors of discarded packets and / or subsequent packets based at least in part on the first packet being received out of order.

[0127] Figure 4 is a diagram illustrating an example 400 associated with dynamic joint indication of DMRS configuration and physical uplink channel transmission mode in accordance with aspects of the present disclosure. Figure 4 As shown, a UE (e.g., UE 120) can communicate with a first base station (e.g., base station 110) and a second base station (e.g., base station 110). In some aspects, the UE, the first base station, and the second base station can be part of one or more wireless networks (e.g., wireless network 100). In some aspects, the UE can communicate with the first base station and the second base station in a dual connectivity mode (e.g., as shown in FIG. 1 ). Figure 3 As described). For example, the UE may communicate with the first base station using a first radio access technology (e.g., LTE) in dual connectivity mode, and communicate with the second base station using a second radio access technology (e.g., NR). Additionally or alternatively, the UE may communicate with the first base station using a first frequency bandwidth (e.g., a sub-6 GHz bandwidth) in dual connectivity mode, and communicate with the second base station using a second frequency bandwidth (e.g., a millimeter wave bandwidth).

[0128] As indicated by reference numeral 405, the first base station may transmit configuration information, and the UE may receive the configuration information (e.g., via the first connection). In some aspects, the UE may receive the configuration information from another device (e.g., from the second base station, another base station, and / or another UE) and / or determine the configuration information from a communication standard (e.g., a communication standard known to the UE), etc. In some aspects, the UE may receive the configuration information via one or more of RRC signaling, one or more media access control (MAC) control elements (MAC-CE), etc. In some aspects, the configuration information may include: an indication of one or more configuration parameters selected by the UE (e.g., configuration parameters already known to the UE), explicit configuration information for the UE to use to configure the UE, and the like.

[0129] In some aspects, the configuration information may indicate that the UE is to report the ability to support dual connectivity mode (e.g., via RRC signaling), measure reference signals, and / or provide measurement reports to support dual connectivity mode. For example, the configuration information may indicate that the UE will provide measurement reports for dual connectivity SCG cell addition to support adding a second connection with a second base station. In some aspects, the configuration information may indicate that the UE is to determine whether data packets of the first connection are out of sequence compared to data packets of the second connection. In some aspects, the configuration information may indicate that the UE is to maintain a packet order for receiving subsequent packets (e.g., based at least in part on the data packets of the second connection) and discard data packets of the first connection. In some aspects, the configuration information may indicate that the UE is to transmit an indication of a radio link failure based at least in part on determining that data packets of the first connection are out of sequence compared to data packets of the second connection.

[0130] The UE may configure the UE based at least in part on the configuration information.In some aspects, the UE may be configured to perform one or more operations described herein.

[0131] As indicated by reference numeral 410, the UE may receive one or more packets via the first connection.In some aspects, the UE may receive a first packet having a first sequence number via the first connection of the dual connectivity mode.

[0132] As indicated by reference numeral 415, the UE may receive one or more packets via the second connection.In some aspects, the UE may receive a second packet having a first sequence number via the first connection of the dual connectivity mode.

[0133] As indicated by reference numeral 420, the UE may determine that one or more packets of the first connection are received out of sequence compared to one or more packets of the second connection. In some aspects, the UE may determine that the first packet is received out of sequence based at least in part on the first sequence number and the second sequence number. In some aspects, the UE may determine that the first packet is a stale packet based at least in part on the first sequence number and the second sequence number.

[0134] As indicated by reference numeral 425, the UE may determine to discard one or more packets of the first connection and / or maintain packet order. In some aspects, the UE may determine to discard one or more packets of the first connection and maintain packet order. In some aspects, the UE may determine to deliver one or more packets of the first connection to an upper layer (e.g., to process the one or more packets) and maintain packet order (e.g., to avoid reordering a receive window for receiving subsequent packets).

[0135] In some aspects, the UE may determine to discard the one or more packets and / or maintain packet order based at least in part on the one or more packets of the first connection having one or more valid HFN numbers. In some aspects, the UE may determine that the first packet is out of sequence (e.g., stale or out of sequence compared to the second packet) based at least in part on maintaining an HFN counter associated with the first connection and a second HFN counter associated with the second connection. The UE may determine a first value of the first HFN counter and a second value of the second HFN counter, and may determine that the first value is decoded by the HFN associated with the first HFN counter, and determine that the second value is decoded by the HFN associated with the second HFN counter. In other words, the UE may use separate HFN counters for the first connection and the second connection to determine whether each packet is in sequence within the first connection or the second connection, respectively. The UE may determine to discard the one or more packets and maintain packet order based at least in part on the one or more packets of the first connection having one or more valid HFN numbers. The one or more packets may have one or more valid HFN numbers based at least in part on the one or more packets being in sequence within the first connection and out of sequence compared to data packets of the second connection.

[0136] As indicated by reference numeral 430, the UE may maintain packet order for receiving subsequent packets via the first connection or the second connection. For example, the UE may maintain packet order for receiving subsequent packets via the second connection even though the first sequence number may indicate that the UE should adjust the packet order to receive subsequent packets via the first connection. In some aspects, maintaining the packet order (e.g., PDCP packet order) may include maintaining a receive window for receiving subsequent packets.

[0137] In some aspects, the UE may deliver one or more packets of the first connection to upper layers (e.g., to process the one or more packets) and maintain packet order (e.g., to avoid reordering a receive window for receiving subsequent packets).

[0138] As shown in reference numeral 435, the UE may discard one or more packets of the first connection. For example, the UE may discard one or more packets of the first connection based at least in part on determining that the first packet was received out of sequence (e.g., the first packet is stale). In some aspects, the UE may have received data of the first packet via a previously received packet of the second connection. In some aspects, the first packet may be out of date because it is stale.

[0139] As indicated by reference numeral 440, the UE may receive the subsequent one or more packets via the first connection.For example, the UE may receive the one or more packets via the first connection using a receive window based at least in part on sequence numbers of data packets received via the second connection.

[0140] As indicated by reference numeral 445, the UE may receive subsequent one or more packets via the second connection. For example, the UE may receive one or more packets via the second connection using a receive window based at least in part on sequence numbers of data packets received via the second connection.

[0141] Based at least in part on discarding the first packet and maintaining the packet order for receiving subsequent packets, the UE may continue to communicate via the second connection without updating the receive window or HFN to match the stale packet of the first connection. In this way, the UE may save computing, network, communication and / or power resources that may otherwise be used to detect and correct reception errors of discarded packets and / or subsequent packets based at least in part on the first packet being received out of order.

[0142] As indicated above, Figure 4 are provided as examples. Other examples may differ from those described herein. Figure 4 Examples described.

[0143] Figure 5is a diagram illustrating an example 500 associated with dynamic joint indication of DMRS configuration and physical uplink channel transmission mode in accordance with aspects of the present disclosure. Figure 5 As shown, a UE (e.g., UE 120) can communicate with a first base station (e.g., base station 110) and a second base station (e.g., base station 110). In some aspects, the UE, the first base station, and the second base station can be part of one or more wireless networks (e.g., wireless network 100). In some aspects, the UE can communicate with the first base station and the second base station in a dual connectivity mode (e.g., as shown in FIG. 1 ). Figure 3 As described). For example, the UE may communicate with the first base station using a first radio access technology (e.g., LTE) in dual connectivity mode, and communicate with the second base station using a second radio access technology (e.g., NR). Additionally or alternatively, the UE may communicate with the first base station using a first frequency bandwidth (e.g., a sub-6 GHz bandwidth) in dual connectivity mode, and communicate with the second base station using a second frequency bandwidth (e.g., a millimeter wave bandwidth).

[0144] As indicated by reference numeral 505, the first base station may transmit configuration information, and the UE may receive the configuration information (e.g., via the first connection). In some aspects, the UE may receive the configuration information from another device (e.g., from the second base station, another base station, and / or another UE) and / or determine the configuration information from a communication standard (e.g., a communication standard known to the UE), etc. In some aspects, the UE may receive the configuration information via one or more of RRC signaling, one or more MAC-CEs, etc. In some aspects, the configuration information may include: an indication of one or more configuration parameters selected by the UE (e.g., configuration parameters already known to the UE), explicit configuration information for the UE to use to configure the UE, and the like.

[0145] In some aspects, the configuration information may indicate that the UE is to report the ability to support dual connectivity mode (e.g., via RRC signaling), measure reference signals, and / or provide measurement reports to support dual connectivity mode. For example, the configuration information may indicate that the UE will provide measurement reports for dual connectivity SCG cell addition to support adding a second connection with a second base station. In some aspects, the configuration information may indicate that the UE is to determine whether data packets of the first connection are out of sequence compared to data packets of the second connection. In some aspects, the configuration information may indicate that the UE is to maintain a packet order for receiving subsequent packets (e.g., based at least in part on the data packets of the second connection) and discard data packets of the first connection. In some aspects, the configuration information may indicate that the UE is to transmit an indication of a radio link failure based at least in part on determining that data packets of the first connection are out of sequence compared to data packets of the second connection.

[0146] The UE may configure the UE based at least in part on the configuration information.In some aspects, the UE may be configured to perform one or more operations described herein.

[0147] As indicated by reference numeral 510, the UE may receive one or more packets via a first connection.In some aspects, the UE may receive a first packet having a first sequence number via a first connection of a dual connectivity mode.

[0148] As indicated by reference numeral 515, the UE may receive one or more packets via the second connection.In some aspects, the UE may receive a second packet having a first sequence number via the first connection of the dual connectivity mode.

[0149] As indicated by reference numeral 520, the UE may determine that one or more packets of the first connection are received out of sequence compared to one or more packets of the second connection. In some aspects, the UE may determine that the first packet is received out of sequence based at least in part on the first sequence number and the second sequence number. In some aspects, the UE may determine that the first packet is a stale packet based at least in part on the first sequence number and the second sequence number.

[0150] As indicated by reference numeral 525, the UE may determine whether a voice call is ongoing. For example, the UE may determine whether a voice call is ongoing via a first connection (e.g., an LTE voice call or an NR voice call, etc.) or via a second connection (e.g., an LTE voice call and an NR voice call).

[0151] As indicated by reference numeral 530, the UE may determine to transmit an indication of a radio link failure. In some aspects, the UE may determine to transmit an indication of a radio link failure based at least in part on determining that the first packet was received out of sequence and / or the voice call was not in progress. In some aspects, the UE may determine to transmit the indication of the radio link failure after the voice call ends.

[0152] In some aspects, the UE may determine to transmit an indication of a radio link failure based at least in part on the number of data packets that have been received out of sequence via the first connection satisfying an out of sequence threshold. For example, after a configured number of packets have been received out of sequence, the UE may transmit an indication of a radio link failure. In some aspects, using an out of sequence threshold may save computing, network, communication, and power resources that may otherwise be consumed to indicate a radio link failure and perform a radio link recovery procedure when unnecessary.

[0153] As indicated by reference numeral 535, the UE may transmit an indication of the radio link failure to the first base station. As indicated by reference numeral 540, the UE may transmit an indication of the radio link failure to the second base station. In some aspects, the transmission of the indication of the radio link failure may trigger a radio link failure and a radio link recovery procedure. The radio link failure and radio link recovery procedure may include exchanging RRC configuration messages, transmitting capability reports, measuring reference signals, transmitting measurement reports, and performing dual connectivity SCG cell addition operations.

[0154] As indicated by reference numeral 545, the UE may determine to transmit an indication that the UE does not support dual connectivity mode. In some aspects, the UE may determine to transmit an indication that the UE does not support dual connectivity mode based at least in part on the number of transmissions of an indication of a radio link failure satisfying a radio link failure threshold. For example, after transmitting an indication of a radio link failure a configured number of times, the UE may transmit an indication that the UE does not support dual connectivity mode. In some aspects, using a radio link failure threshold may save computing, network, communication, and power resources that may otherwise be consumed to repeatedly attempt to communicate in dual connectivity mode when the first connection provides data packets that are out of sequence compared to data packets of the second connection.

[0155] As indicated by reference numeral 550, the UE may transmit an indication to the first base station that the UE does not support the dual connectivity mode. As indicated by reference numeral 555, the UE may transmit an indication to the second base station that the UE does not support the dual connectivity mode. In some aspects, the UE may transmit the indication that the UE does not support the dual connectivity mode explicitly (e.g., in a capability report) or implicitly (e.g., based at least in part on omitting measurement reporting for a dual connectivity SCG cell addition procedure).

[0156] Based at least in part on transmitting an indication of a radio link failure, the UE may continue to communicate via the second connection without updating a receive window or HFN to match stale packets of the first connection. In this manner, the UE may save computational, network, communication, and / or power resources that might otherwise be used to detect and correct reception errors of discarded packets and / or subsequent packets based at least in part on the first packet being received out of sequence.

[0157] As indicated above, Figure 5 are provided as examples. Other examples may differ from those described herein. Figure 5 Examples described.

[0158] Figure 6is a diagram illustrating an example process 600 performed, for example, by a UE in accordance with various aspects of the present disclosure. Example process 600 is an example of a UE (eg, UE 120) performing operations associated with techniques for recovering from dual connectivity data stalling.

[0159] like Figure 6 As shown, in some aspects, process 600 may include receiving a first packet having a first sequence number via a first connection in dual connectivity mode (block 610). For example, a UE (eg, using receiving component 802, such as Figure 8 ) may receive a first packet having a first sequence number via a first connection of a dual connectivity mode, as described above.

[0160] like Figure 6 As further shown, in some aspects, process 600 may include receiving a second packet having a second sequence number via a second connection in dual connectivity mode (block 620). For example, the UE (eg, using receiving component 802, such as Figure 8 ) may receive a second packet having a second sequence number via a second connection of the dual connectivity mode, as described above.

[0161] like Figure 6 As further shown, in some aspects, process 600 may include determining that the first packet was received out of sequence based at least in part on the first sequence number and the second sequence number (block 630). Figure 8 Depicted determining component 808) can determine that the first packet was received out of sequence based at least in part on the first sequence number and the second sequence number, as described above.

[0162] like Figure 6 As further shown, in some aspects, process 600 may include maintaining a packet order for receiving subsequent packets via the first connection or the second connection (block 640). For example, the UE (e.g., using receiving component 802 and / or determining component 808, such as Figure 8 As depicted) can maintain packet order for receiving subsequent packets via the first connection or the second connection, as described above.

[0163] like Figure 6 As further shown, in some aspects, process 600 may include discarding the first packet based at least in part on determining that the first packet was received out of sequence (block 650). For example, as described above, a UE (e.g., using Figure 8 The receiving component 802 and / or determining component 808 depicted in FIG. 8 may discard the first packet based at least in part on determining that the first packet was received out of sequence.

[0164] Process 600 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0165] In a first aspect, determining that the first packet was received out of sequence includes determining a first value of a first HFN counter associated with the first connection, determining a second value of a second HFN counter associated with the second connection, determining the first value via a HFN decryption associated with the first HFN counter, and determining the second value via a HFN decryption associated with the second HFN counter.

[0166] In a second aspect, alone or in combination with the first aspect, process 600 includes determining to discard a first packet and maintain packet order for receiving subsequent packets based at least in part on the first value being a valid HFN number.

[0167] In a third aspect, alone or in combination with one or more of the first and second aspects, process 600 includes determining that the first packet is a stale packet based at least in part on the first sequence number and the second sequence number.

[0168] In a fourth aspect, alone or in combination with one or more of the first to third aspects, maintaining packet order for receiving subsequent data packets includes maintaining a receive window for receiving subsequent packets.

[0169] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the first connection is associated with a first RAT and the second connection is associated with a second RAT different from the first RAT.

[0170] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the first connection is associated with a first frequency bandwidth and the second connection is associated with a second frequency bandwidth different from the first frequency bandwidth.

[0171] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, determining that the first packet is received out of sequence is based at least in part on the first sequence number and the second sequence number satisfying a sequence number threshold.

[0172] although Figure 6 An example block diagram of process 600 is shown, but in some aspects, process 600 may include Figure 6 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in process 600. Additionally or alternatively, two or more blocks of process 600 may be executed in parallel.

[0173] Figure 7is a diagram illustrating an example process 700 performed, for example, by a UE in accordance with various aspects of the present disclosure. Example process 700 is an example of a UE (eg, UE 120) performing operations associated with techniques for recovering from dual connectivity data suspension.

[0174] like Figure 7 As shown, in some aspects, process 700 may include receiving a first packet having a first sequence number via a first connection in dual connectivity mode (block 710). For example, a UE (eg, using receiving component 802, such as Figure 8 ) may receive a first packet having a first sequence number via a first connection of a dual connectivity mode, as described above.

[0175] like Figure 7 As further shown, in some aspects, process 700 may include receiving a second packet having a second sequence number via a second connection in dual connectivity mode (block 720). For example, the UE (eg, using receiving component 802, such as Figure 8 ) may receive a second packet having a second sequence number via a second connection of the dual connectivity mode, as described above.

[0176] like Figure 7 As further shown, in some aspects, process 700 may include determining that the first packet was received out of sequence based at least in part on the first sequence number and the second sequence number (block 730). Figure 8 Depicted determining component 808) can determine that the first packet was received out of sequence based at least in part on the first sequence number and the second sequence number, as described above.

[0177] like Figure 7 As further shown in FIG. 7 , in some aspects, process 700 may include transmitting an indication of a radio link failure based at least in part on determining that the first packet was received out of sequence (block 740). For example, as described above, a UE (e.g., using Figure 8 Depicted transmitting component 804) can transmit an indication of a radio link failure based at least in part on determining that the first packet was received out of sequence.

[0178] Process 700 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0179] In a first aspect, process 700 includes determining that a voice call is ongoing via the first connection or the second connection; and determining to transmit an indication of a radio link failure after the voice call ends.

[0180] In a second aspect, either alone or in combination with the first aspect, process 700 includes determining a number of packets, including the first packet, that have been received out of sequence via the first connection; determining that the number of packets satisfies an out-of-sequence threshold; and determining to transmit the indication of a radio link failure based at least in part on the number satisfying the out-of-sequence threshold.

[0181] In a third aspect, either alone or in combination with one or more of the first and second aspects, process 700 includes determining a number of transmissions of an indication of a radio link failure; determining that the number satisfies a radio link failure threshold; and determining to transmit an indication that the UE does not support dual connectivity.

[0182] In a fourth aspect, either alone or in combination with one or more of the first to third aspects, process 700 includes determining a number of transmissions of an indication of a radio link failure; determining that the number satisfies a radio link failure threshold; and determining to omit measurement reporting for a dual connectivity second cell group cell add procedure.

[0183] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the first connection is associated with a first RAT and the second connection is associated with a second RAT different from the first RAT.

[0184] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the first connection is associated with a first frequency bandwidth and the second connection is associated with a second frequency bandwidth different from the first frequency bandwidth.

[0185] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, determining that the first packet is received out of sequence is based at least in part on the first sequence number and the second sequence number satisfying a sequence number threshold.

[0186] although Figure 7 An example block diagram of process 700 is shown, but in some aspects, process 700 may include Figure 7 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 700. Additionally or alternatively, two or more blocks of the process 700 may be executed in parallel.

[0187] Figure 8800 is a block diagram of an example device 800 for wireless communication. Device 800 may be a UE, or a UE may include device 800. In some aspects, apparatus 800 includes a receiving component 802 and a transmitting component 804, which may be in communication with each other (e.g., via one or more buses and / or one or more other components). As shown, apparatus 800 may use receiving component 802 and transmitting component 804 to communicate with another apparatus 806 (such as a UE, a base station, or another wireless communication device). As further shown, apparatus 800 may include a determining component 808.

[0188] In some aspects, the apparatus 800 may be configured to perform Figure 4 and 5 Additionally or alternatively, the device 800 may be configured to perform one or more of the processes described herein (such as Figure 6 The process of 600 Figure 7 In some aspects, the apparatus 800 and / or Figure 8 One or more components shown in the figure may include the above combination Figure 2 Additionally or alternatively, Figure 8 One or more of the components shown in the above may be combined Figure 2 In one or more components described herein, the components may be implemented in a computer program product. Additionally or alternatively, one or more components in the component set may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or codes stored in a non-transitory computer-readable medium and may be executed by a controller or processor to perform the function or operation of the component.

[0189] The receiving component 802 may receive communications (such as reference signals, control information, data communications, or a combination thereof) from the device 806. The receiving component 802 may provide the received communications to one or more other components of the apparatus 800. In some aspects, the receiving component 802 may perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) on the received communications and may provide the processed signals to one or more other components of the device 806. In some aspects, the receiving component 802 may include a combination of the above. Figure 2 One or more antennas, demodulators, MIMO detectors, receive processors, controllers / processors, memories, or combinations thereof of the described UE.

[0190] Transmission component 804 may transmit communications (such as reference signals, control information, data communications, or a combination thereof) to device 806. In some aspects, one or more other components of device 806 may generate communications and may provide the generated communications to transmission component 804 for transmission to device 806. In some aspects, transmission component 804 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, encoding, etc.) on the generated communications and may transmit the processed signals to device 806. In some aspects, transmission component 804 may include a combination of the above. Figure 2 One or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memory, or combinations thereof of the described UE. In some aspects, the transmitting component 804 can be co-located with the receiving component 802 in a transceiver.

[0191] The receiving component 802 may receive a first packet having a first sequence number via a first connection of the dual connectivity mode. The receiving component 802 may receive a second packet having a second sequence number via a second connection of the dual connectivity mode. The determining component 808 may determine that the first packet was received out of sequence based at least in part on the first sequence number and the second sequence number. The receiving component 802 and / or the determining component 808 may maintain a packet order for receiving subsequent packets via the first connection or the second connection. The receiving component 802 and / or the determining component 808 may discard the first packet based at least in part on determining that the first packet was received out of sequence.

[0192] Determining component 808 can determine to discard the first packet and maintain packet order for receiving subsequent packets based at least in part on the first value being a valid HFN number.

[0193] Determining component 808 can determine that the first packet is a stale packet based at least in part on the first sequence number and the second sequence number.

[0194] The receiving component 802 may receive a first packet having a first sequence number via a first connection of the dual connectivity mode. The receiving component 802 may receive a second packet having a second sequence number via a second connection of the dual connectivity mode. The determining component 808 may determine that the first packet was received out of sequence based at least in part on the first sequence number and the second sequence number. The transmitting component 804 may transmit an indication of a radio link failure based at least in part on determining that the first packet was received out of sequence.

[0195] The determining component 808 can determine that a voice call is ongoing via the first connection or the second connection.

[0196] Determining component 808 can determine to transmit an indication of a radio link failure after the voice call ends.

[0197] Determining component 808 can determine a number of packets, including the first packet, that have been received out of sequence via the first connection. Determining component 808 can determine that the number of packets satisfies an out-of-sequence threshold. Determining component 808 can determine to transmit an indication of a radio link failure based at least in part on the number satisfying the out-of-sequence threshold.

[0198] Determining component 808 can determine a number of transmissions of an indication of radio link failure. Determining component 808 can determine that the number satisfies a radio link failure threshold. Determining component 808 can determine to transmit an indication that the UE does not support dual connectivity.

[0199] Determining component 808 may determine a number of transmissions of an indication of a radio link failure. Determining component 808 may determine that the number satisfies a radio link failure threshold. Determining component 808 may determine to omit measurement reporting for a dual connectivity second cell group cell add procedure.

[0200] Figure 8 The number and arrangement of components shown in the figure are provided as examples. In practice, there may be Figure 8 Additional components, fewer components, different components, or differently arranged components than those shown in FIG. Figure 8 Two or more components shown in may be implemented in a single component, or Figure 8 The single component shown in may be implemented as multiple distributed components. Additionally or alternatively, Figure 8 The component collection (e.g., one or more components) shown in FIG. 1 may be described as being executed by Figure 8 Another set of components shown in FIG. 1 performs one or more functions.

[0201] Fig. 9 900 is a block diagram of an example apparatus 900 for wireless communication. Apparatus 900 may be a base station, or a base station may include apparatus 900. In some aspects, apparatus 900 includes a receiving component 902 and a transmitting component 904, which may be in communication with each other (e.g., via one or more buses and / or one or more other components). As shown, apparatus 900 may use receiving component 902 and transmitting component 904 to communicate with another apparatus 906 (such as a UE, a base station, or another wireless communication device). As further shown, apparatus 900 may include a determining component 908.

[0202] In some aspects, the apparatus 900 may be configured to perform Figure 4 and 5 Additionally or alternatively, the apparatus 900 may be configured to perform one or more of the processes described herein. In some aspects, the apparatus 900 and / or Fig. 9One or more components shown in the figure may include the above combination Figure 2 Additionally or alternatively, Fig. 9 One or more of the components shown in the above may be combined Figure 2 In one or more components described herein, the components may be implemented in a computer program product. Additionally or alternatively, one or more components in the component set may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or codes stored in a non-transitory computer-readable medium and may be executed by a controller or processor to perform the function or operation of the component.

[0203] The receiving component 902 may receive communications (such as reference signals, control information, data communications, or a combination thereof) from the device 906. The receiving component 902 may provide the received communications to one or more other components of the apparatus 900. In some aspects, the receiving component 902 may perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) on the received communications and may provide the processed signals to one or more other components of the device 906. In some aspects, the receiving component 902 may include a combination of the above. Figure 2 One or more antennas, demodulators, MIMO detectors, receive processors, controllers / processors, memories, or combinations thereof of the described base stations.

[0204] Transmission component 904 may transmit communications (such as reference signals, control information, data communications, or a combination thereof) to device 906. In some aspects, one or more other components of device 906 may generate communications and may provide the generated communications to transmission component 904 for transmission to device 906. In some aspects, transmission component 904 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, encoding, etc.) on the generated communications and may transmit the processed signals to device 906. In some aspects, transmission component 904 may include a combination of the above. Figure 2 One or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memory, or combinations thereof of the described base stations. In some aspects, the transmitting component 904 can be co-located with the receiving component 902 in a transceiver.

[0205] Fig. 9 The number and arrangement of components shown in the figure are provided as examples. In practice, there may be Fig. 9 Additional components, fewer components, different components, or differently arranged components than those shown in FIG. Fig. 9 Two or more components shown in may be implemented in a single component, or Fig. 9The single component shown in may be implemented as multiple distributed components. Additionally or alternatively, Fig. 9 The component collection (e.g., one or more components) shown in FIG. 1 may be described as being executed by Fig. 9 Another set of components shown in FIG. 1 performs one or more functions.

[0206] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired by practice of the various aspects.

[0207] As used herein, the term "component" is intended to be broadly interpreted as a combination of hardware, firmware, and / or hardware and software. As used herein, a processor is implemented with a combination of hardware, firmware, and / or hardware and software. It will be apparent that the system and / or method described herein can be implemented in different forms of hardware, firmware, and / or a combination of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods does not limit various aspects. Thus, the operation and behavior of these systems and / or methods are described herein without reference to specific software codes--it is understood that software and hardware can be designed to implement these systems and / or methods based at least in part on the description herein.

[0208] As used herein, satisfying a threshold may refer to a value being greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0209] Although specific feature combinations are described in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features can be combined in a manner not specifically described in the claims and / or undisclosed in the specification. Although each dependent claim listed below can be directly subordinate to only one claim, the disclosure of various aspects includes that each dependent claim is combined with each other claim in this group of claims. As used herein, the phrase quoting "at least one of" a column of items refers to any combination of these 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, and any combination with multiple identical elements (for example, aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc and ccc, or any other sorting of a, b and c).

[0210] Elements, actions or instructions used herein should not be interpreted as key or necessary unless explicitly described as such. Moreover, as used herein, the articles "one" and "a" are intended to include one or more projects, and can be used interchangeably with "one or more". In addition, as used herein, the article "the" is intended to include one or more projects quoted in conjunction with the article "the", and can be used interchangeably with "one or more". In addition, as used herein, the terms "set (set)" and "group" are intended to include one or more projects (for example, related items, non-related items, or a combination of related items and non-related items), and can be used interchangeably with "one or more". In the occasion of intending to have only one project, the phrase "only one" or similar language is used. Moreover, as used herein, the terms "having", "containing", "including" etc. are intended to be open terms. In addition, the phrase "based on" is intended to mean "based at least in part on", unless otherwise explicitly stated. Furthermore, as used herein, the term "or" when used in a sequence is intended to be inclusive and may be used interchangeably with "and / or" unless explicitly stated otherwise (e.g., when used in conjunction with "either of" or "only one of").

Claims

1. A wireless communication method performed by a user equipment UE, comprising: receiving, via a first connection in dual connectivity mode, a first packet having a first sequence number; receiving a second packet having a second sequence number via a second connection of the dual connectivity mode; determining that the first packet is received out of sequence based at least in part on the first sequence number and the second sequence number, wherein the determining comprises determining that the first packet is received out of sequence based at least in part on the UE maintaining a first hyperframe number (HFN) counter associated with the first connection and a second HFN counter associated with the second connection; discarding the first packet based at least in part on determining that the first packet was received out of sequence; as well as A receive window is maintained for receiving subsequent packets.

2. The method of claim 1 , wherein determining that the first packet was received out of sequence comprises: determining a first value of the first HFN counter associated with the first connection, determining a second value of the second HFN counter associated with the second connection, determining that the first value is decoded by a HFN associated with the first HFN counter, and The second value is determined by deciphering the HFN associated with the second HFN counter.

3. The method of claim 2, further comprising: A determination is made to discard the first packet based at least in part on the first value being a valid HFN number.

4. The method of claim 1, further comprising: The first packet is determined to be a stale packet based at least in part on the first sequence number and the second sequence number. 5 . The method of claim 1 , wherein the first connection is associated with a first radio access technology (RAT) and the second connection is associated with a second RAT different from the first RAT.

6. The method of claim 1, wherein the first connection is associated with a first frequency bandwidth and the second connection is associated with a second frequency bandwidth different from the first frequency bandwidth.

7. The method of claim 1, wherein determining that the first packet was received out of sequence is based at least in part on the first sequence number and the second sequence number satisfying a sequence number threshold.

8. A user equipment UE for wireless communication, comprising: Memory; as well as one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: receiving, via a first connection in dual connectivity mode, a first packet having a first sequence number; receiving a second packet having a second sequence number via a second connection of the dual connectivity mode; determining that the first packet is received out of sequence based at least in part on the first sequence number and the second sequence number, wherein the determining comprises determining that the first packet is received out of sequence based at least in part on the UE maintaining a first hyperframe number (HFN) counter associated with the first connection and a second HFN counter associated with the second connection; discarding the first packet based at least in part on determining that the first packet was received out of sequence; as well as A receive window is maintained for receiving subsequent packets.

9. The UE of claim 8, wherein determining that the first packet is received out of sequence comprises: determining a first value of the first HFN counter associated with the first connection, determining a second value of the second HFN counter associated with the second connection, determining that the first value is decoded by a HFN associated with the first HFN counter, and The second value is determined by deciphering the HFN associated with the second HFN counter.

10. The UE of claim 9, wherein the one or more processors are further configured to: A determination is made to discard the first packet based at least in part on the first value being a valid HFN number.

11. The UE of claim 8, wherein the one or more processors are further configured to: The first packet is determined to be a stale packet based at least in part on the first sequence number and the second sequence number.

12. The UE of claim 8, wherein the first connection is associated with a first radio access technology (RAT), and the second connection is associated with a second RAT different from the first RAT.

13. The UE of claim 8, wherein the first connection is associated with a first frequency bandwidth and the second connection is associated with a second frequency bandwidth different from the first frequency bandwidth.

14. The UE of claim 8, wherein determining that the first packet is received out of sequence is based at least in part on the first sequence number and the second sequence number satisfying a sequence number threshold.

15. A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising: One or more instructions that, when executed by one or more processors of a user equipment UE, cause the one or more processors to perform the following operations; receiving, via a first connection in dual connectivity mode, a first packet having a first sequence number; receiving a second packet having a second sequence number via a second connection of the dual connectivity mode; determining that the first packet is received out of sequence based at least in part on the first sequence number and the second sequence number, wherein the determining comprises determining that the first packet is received out of sequence based at least in part on the UE maintaining a first hyperframe number (HFN) counter associated with the first connection and a second HFN counter associated with the second connection; discarding the first packet based at least in part on determining that the first packet was received out of sequence; as well as A receive window is maintained for receiving subsequent packets.

16. The non-transitory computer-readable medium of claim 15, wherein the one or more instructions, when executed by one or more processors of the UE, further cause the one or more processors to perform the method of any one of claims 2-7.

17. A user equipment UE for wireless communication, comprising: means for receiving, via a first connection of a dual connectivity mode, a first packet having a first sequence number; means for receiving a second packet having a second sequence number via a second connection of said dual connectivity mode; means for determining that the first packet was received out of sequence based at least in part on the first sequence number and the second sequence number, wherein the determining comprises determining that the first packet was received out of sequence based at least in part on the UE maintaining a first hyperframe number (HFN) counter associated with the first connection and a second HFN counter associated with the second connection; means for discarding the first packet based at least in part on determining that the first packet was received out of sequence; as well as Means for maintaining a receive window for receiving subsequent packets.

18. The UE of claim 17, wherein the UE further comprises means for performing the method of any one of claims 2-7.

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