WO2022047611A1

WO2022047611A1 - Techniques for avoiding scheduling outages

Info

Publication number: WO2022047611A1
Application number: PCT/CN2020/112787
Authority: WO
Inventors: Ling Xie; Rahul MARINGANTI; Ankur Srivastava; Mohammad Ashraf
Original assignee: Qualcomm Incorporated
Priority date: 2020-09-01
Filing date: 2020-09-01
Publication date: 2022-03-10

Abstract

Certain aspects of the present disclosure provide techniques for avoiding scheduling outages at a scheduler of a base station. A method that may be performed by a user equipment (UE) includes receiving, via a first subscription, one or more packets of a plurality of packets from a wireless node during a first duration of a discontinuous reception (DRX) mode, detecting at least one missing packet of the plurality of packets, transmitting a request to the wireless node, requesting resources for transmitting a report associated with the plurality of packets, and receiving the at least one missing packet during the first duration of the DRX mode based, at least in part, on the transmission of the request.

Description

TECHNIQUES FOR AVOIDING SCHEDULING OUTAGES

INTRODUCTION

Field of the Disclosure

[0001] Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for avoiding scheduling outages in multi-subscriber identity module (SIM) implementations.

Description of Related Art

[0002] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcasts, etc. These wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access systems include 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems, LTE Advanced (LTE-A) systems, code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems, to name a few.

[0003] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless nodes (e.g., BSs and/or UEs) to communicate on a municipal, national, regional, and even global level. New radio (e.g., 5G NR) is an example of an emerging telecommunication standard. NR is a set of enhancements to the LTE mobile standard promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using OFDMA with a cyclic prefix (CP) on the downlink (DL) and on the uplink (UL). To these ends, NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. [0004] However, as the demand for mobile broadband access continues to increase, there exists a need for further improvements in NR and LTE technology. Preferably, these improvements should be applicable to other multi-access technologies and the telecommunication standards that employ these technologies.

SUMMARY

[0005] The systems, methods, and devices of the disclosure each have several aspects, no single one of which is solely responsible for its desirable attributes. Without limiting the scope of this disclosure as expressed by the claims which follow, some features will now be discussed briefly. After considering this discussion, and particularly after reading the section entitled “Detailed Description” one will understand how the features of this disclosure provide advantages that include avoiding scheduling outages in multisubscriber identity module (SIM) implementations.

[0006] Certain aspects provide a method for wireless communications by a user equipment (UE). The method generally includes receiving, via a first subscription, one or more packets of a plurality of packets from a wireless node during a first duration of a discontinuous reception (DRX) mode, detecting at least one missing packet of the plurality of packets, transmitting a request to the wireless node, requesting resources for transmitting a report associated with the plurality of packets, and receiving the at least one missing packet during the first duration of the DRX mode based, at least in part, on the transmission of the request.

[0007] Certain aspects provide a user equipment (UE). The UE generally includes means for receiving, via a first subscription, one or more packets of a plurality of packets from a wireless node during a first duration of a discontinuous reception (DRX) mode, means for detecting at least one missing packet of the plurality of packets, means for transmitting a request to the wireless node, requesting resources for transmitting a report associated with the plurality of packets, and means for receiving the at least one missing packet during the first duration of the DRX mode based, at least in part, on the transmission of the request.

[0008] Certain aspects provide a user equipment (UE). The UE generally includes a receiver configured to receive, via a first subscription, one or more packets of a plurality of packets from a wireless node during a first duration of a discontinuous reception (DRX) mode, a processing system configured to detect at least one missing packet of the plurality of packets, and a transmitter configured transmit a request to the wireless node, requesting resources for transmitting a report associated with the plurality of packets, wherein the receiver is further configured to receive the at least one missing packet during the first duration of the DRX mode based, at least in part, on the transmission of the request.

[0009] Certain aspects provide an apparatus for wireless communications. The apparatus generally includes an interface configured to obtain, via a first subscription, one or more packets of a plurality of packets from a wireless node during a first duration of a discontinuous reception (DRX) mode and a processing system configured to detect at least one missing packet of the plurality of packets, wherein the interface is further configured to output, for transmission, a request to the wireless node, requesting resources for transmitting a report associated with the plurality of packets and the interface is further configured to obtain the at least one missing packet during the first duration of the DRX mode based, at least in part, on the transmission of the request.

[0010] Certain aspects provide a computer-readable medium for wireless communications. The computer-readable medium includes codes executable to obtain, via a first subscription, one or more packets of a plurality of packets from a wireless node during a first duration of a discontinuous reception (DRX) mode, detect at least one missing packet of the plurality of packets, output, for transmission, a request to the wireless node, requesting resources for transmitting a report associated with the plurality of packets, and obtain the at least one missing packet during the first duration of the DRX mode based, at least in part, on the transmission of the request.

[0011] To the accomplishment of the foregoing and related ends, the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the appended drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed.

BRIEF DESCRIPTION OF THE DRAWINGS

[0012] So that the manner in which the above-recited features of the present disclosure can be understood in detail, a more particular description, briefly summarized above, may be had by reference to aspects, some of which are illustrated in the drawings. It is to be noted, however, that the appended drawings illustrate only certain typical aspects of this disclosure and are therefore not to be considered limiting of its scope, for the description may admit to other equally effective aspects.

[0013] FIG. 1 is a block diagram conceptually illustrating an example telecommunications system, in accordance with certain aspects of the present disclosure.

[0014] FIG. 2 is a block diagram conceptually illustrating a design of an example a base station (BS) and user equipment (UE), in accordance with certain aspects of the present disclosure.

[0015] FIG. 3 is an example frame format for new radio (NR), in accordance with certain aspects of the present disclosure.

[0016] FIG. 4 is a flow diagram illustrating example operations for wireless communication by a UE, in accordance with certain aspects of the present disclosure.

[0017] FIG. 5 illustrates a wireless node that may include various components configured to perform operations for the techniques disclosed herein in accordance with aspects of the present disclosure.

[0018] To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the figures. It is contemplated that elements disclosed in one aspect may be beneficially utilized on other aspects without specific recitation.

DETAILED DESCRIPTION

[0019] Aspects of the present disclosure provide apparatus, methods, processing systems, and computer readable mediums for avoiding scheduling outages. For example, in some cases, a user equipment (UE) may miss at least one packet of a plurality of packets from a base station during a first duration of a discontinuous reception (DRX) mode. In some cases, the UE may fail to receive the at least one packet due to a tune away of its radio frequency chains or due to poor channel conditions or interference between the base station and the UE. In such cases, a scheduler at the base station may normally stop retransmission of the at least one packet and proceed to enter a sleep state of the DRX mode at the end of the first duration (e.g., known as a scheduling outage), waiting instead to transmit the at least one missed packet in a subsequent active duration of the DRX mode, which may lead to increased latency in receiving the at least one missed packet. [0020] Accordingly, aspects of the present disclosure provide techniques to extend a time associated with the first duration of the DRX mode such that the base station is able to retransmit the at least one missed packet in the first duration rather than proceeding to enter the sleep state and transmit the at least one packet in the subsequent active duration of the DRX mode, reducing the latency associated with receiving the at least one missed packet.

[0021] The following description provides examples of avoiding scheduling outages, and is not limiting of the scope, applicability, or examples set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For instance, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Also, features described with respect to some examples may be combined in some other examples. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein. In addition, the scope of the disclosure is intended to cover such an apparatus or method which is practiced using other structure, functionality, or structure and functionality in addition to, or other than, the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim. The word “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any aspect described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other aspects.

[0022] In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a particular radio access technology (RAT) and may operate on one or more frequencies. A RAT may also be referred to as a radio technology, an air interface, etc. A frequency may also be referred to as a carrier, a subcarrier, a frequency channel, a tone, a subband, etc. Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs.

[0023] The techniques described herein may be used for various wireless networks and radio technologies. While aspects may be described herein using terminology commonly associated with 3G, 4G, and/or new radio (e.g., 5GNR) wireless technologies, aspects of the present disclosure can be applied in other generation-based communication systems.

[0024] NR access may support various wireless communication services, such as enhanced mobile broadband (eMBB) targeting wide bandwidth (e.g., 80 MHz or beyond), millimeter wave (mmW) targeting high carrier frequency (e.g., 25 GHz or beyond), massive machine type communications MTC (mMTC) targeting non-backward compatible MTC techniques, and/or mission critical targeting ultra-reliable low-latency communications (URLLC). These services may include latency and reliability requirements. These services may also have different transmission time intervals (TTI) to meet respective quality of service (QoS) requirements. In addition, these services may coexist in the same subframe. NR supports beamforming and beam direction may be dynamically configured. MIMO transmissions with precoding may also be supported. MIMO configurations in the DL may support up to 8 transmit antennas with multi-layer DL transmissions up to 8 streams and up to 2 streams per UE. Multi-layer transmissions with up to 2 streams per UE may be supported. Aggregation of multiple cells may be supported with up to 8 serving cells.

[0025] FIG. 1 illustrates an example wireless communication network 100 in which aspects of the present disclosure may be performed. For example, the wireless communication network 100 may be an NR system (e.g., a 5G NR network). As shown in FIG. 1, the wireless communication network 100 may be in communication with a core network 132. The core network 132 may in communication with one or more base station (BSs) 110 and/or user equipment (UE) 120 in the wireless communication network 100 via one or more interfaces.

[0026] As illustrated in FIG. 1, the wireless communication network 100 may include a number of BSs HOa-z (each also individually referred to herein as BS 110 or collectively as BSs 110) and other network entities. A BS 110 may provide communication coverage for a particular geographic area, sometimes referred to as a “cell”, which may be stationary or may move according to the location of a mobile BS 110. In some examples, the BSs 110 may be interconnected to one another and/or to one or more other BSs or network nodes (not shown) in wireless communication network 100 through various types of backhaul interfaces (e.g., a direct physical connection, a wireless connection, a virtual network, or the like) using any suitable transport network. In the example shown in FIG. 1, the BSs 110a, 110b and 110c may be macro BSs for the macro cells 102a, 102b and 102c, respectively. The BS HOx may be a pico BS for a pico cell 102x. The BSs I lOy and HOz may be femto BSs for the femto cells 102y and 102z, respectively. A BS may support one or multiple cells. A network controller 130 may couple to a set of BSs 110 and provide coordination and control for these BSs 110 (e.g., via a backhaul).

[0027] The BSs 110 communicate with UEs 120a-y (each also individually referred to herein as UE 120 or collectively as UEs 120) in the wireless communication network 100. The UEs 120 (e.g., 120x, 120y, etc.) may be dispersed throughout the wireless communication network 100, and each UE 120 may be stationary or mobile. Wireless communication network 100 may also include relay stations (e.g., relay station 1 lOr), also referred to as relays or the like, that receive a transmission of data and/or other information from an upstream station (e.g., a BS 110a or a UE 120r) and sends a transmission of the data and/or other information to a downstream station (e.g., a UE 120 or a BS 110), or that relays transmissions between UEs 120, to facilitate communication between devices.

[0028] According to certain aspects, the UEs 120 may be configured for avoiding scheduling outages as described herein. For example, as shown in FIG. 1, the UE 120a includes a missing packet detection module 122. The missing packet detection module 122 may be configured to perform the operations illustrated in FIG. 4, as well as other operations described herein for avoiding scheduling outages.

[0029] FIG. 2 illustrates example components of BS 110a and UE 120a (e.g., in the wireless communication network 100 of FIG. 1), which may be used to implement aspects of the present disclosure.

[0030] At the BS 110a, a transmit processor 220 may receive data from a data source 212 and control information from a controller/processor 240. The control information may be for the physical broadcast channel (PBCH), physical control format indicator channel (PCFICH), physical hybrid ARQ indicator channel (PHICH), physical downlink control channel (PDCCH), group common PDCCH (GC PDCCH), etc. The data may be for the physical downlink shared channel (PDSCH), etc. A medium access control (MAC)-control element (MAC-CE) is a MAC layer communication structure that may be used for control command exchange between wireless nodes. The MAC-CE may be carried in a shared channel such as a physical downlink shared channel (PDSCH), a physical uplink shared channel (PUSCH), or a physical sidelink shared channel (PSSCH).

[0031] The processor 220 may process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively. The transmit processor 220 may also generate reference symbols, such as for the primary synchronization signal (PSS), secondary synchronization signal (SSS), and channel state information reference signal (CSI-RS). A transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, and/or the reference symbols, if applicable, and may provide output symbol streams to the modulators (MODs) in transceivers 232a-232t. Each modulator in transceivers 232a-232t may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. Downlink signals from modulators in transceivers 232a-232t may be transmitted via the antennas 234a-234t, respectively.

[0032] At the UE 120a, the antennas 252a-252r may receive the downlink signals from the BS 110a and may provide received signals to the demodulators (DEMODs) in transceivers 254a-254r, respectively. Each demodulator in transceivers 254a-254r may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples. Each demodulator may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all the demodulators in transceivers 254a-254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 120a to a data sink 260, and provide decoded control information to a controller/processor 280.

[0033] On the uplink, at UE 120a, a transmit processor 264 may receive and process data (e.g., for the physical uplink shared channel (PUSCH)) from a data source 262 and control information (e.g., for the physical uplink control channel (PUCCH) from the controller/processor 280. The transmit processor 264 may also generate reference symbols for a reference signal (e.g., for the sounding reference signal (SRS)). The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by the modulators (MODs) in transceivers 254a-254r (e.g., for SC-FDM, etc.), and transmitted to the BS 110a. At the BS 110a, the uplink signals from the UE 120a may be received by the antennas 234, processed by the modulators in transceivers 232a-232t, detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by the UE 120a. The receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to the controller/processor 240.

[0034] The memories 242 and 282 may store data and program codes for BS 110a and UE 120a, respectively. A scheduler 244 may schedule UEs for data transmission on the downlink and/or uplink.

[0035] Antennas 252, processors 266, 258, 264, and/or controller/processor 280 of the UE 120a and/or antennas 234, processors 220, 230, 238, and/or controller/processor 240 of the BS 110a may be used to perform the various techniques and methods described herein. For example, as shown in FIG. 2, the controller/processor 280 of the UE 120a includes a missing packet detection module 281 may be configured to perform the operations illustrated in FIG. 4, as well as other operations described herein for avoiding scheduling outages. Although shown at the controller/processor, other components of the UE 120a and BS 110a may be used to perform the operations described herein.

[0036] NR may utilize orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) on the uplink and downlink. NR may support half-duplex operation using time division duplexing (TDD). OFDM and single-carrier frequency division multiplexing (SC-FDM) partition the system bandwidth into multiple orthogonal subcarriers, which are also commonly referred to as tones, bins, etc. Each subcarrier may be modulated with data. Modulation symbols may be sent in the frequency domain with OFDM and in the time domain with SC-FDM. The spacing between adjacent subcarriers may be fixed, and the total number of subcarriers may be dependent on the system bandwidth. The minimum resource allocation, called a resource block (RB), may be 12 consecutive subcarriers. The system bandwidth may also be partitioned into subbands. For example, a subband may cover multiple RBs. NR may support a base subcarrier spacing (SCS) of 15 KHz and other SCS may be defined with respect to the base SCS (e.g., 30 kHz, 60 kHz, 120 kHz, 240 kHz, etc.). [0037] FIG. 3 is a diagram showing an example of a frame format 300 for NR. The transmission timeline for each of the downlink and uplink may be partitioned into units of radio frames. Each radio frame may have a predetermined duration (e.g., 10 ms) and may be partitioned into 10 subframes, each of 1 ms, with indices of 0 through 9. Each subframe may include a variable number of slots (e.g., 1, 2, 4, 8, 16, ... slots) depending on the SCS. Each slot may include a variable number of symbol periods (e.g., 7 or 14 symbols) depending on the SCS. The symbol periods in each slot may be assigned indices. A mini-slot, which may be referred to as a sub-slot structure, refers to a transmit time interval having a duration less than a slot (e.g., 2, 3, or 4 symbols). Each symbol in a slot may indicate a link direction (e.g., DL, UL, or flexible) for data transmission and the link direction for each subframe may be dynamically switched. The link directions may be based on the slot format. Each slot may include DL/UL data as well as DL/UL control information.

Example Techniques for Avoiding Scheduling Outages

[0038] In certain cases, two different subscriptions may be supported on a same device, such as a user equipment (UE), and may be associated with two separate subscriber identification module (SIMs), known as multi-SIM (MSIM). These subscriptions could associated with the same radio network or different radio access networks and could have different subscription profiles and quality of service (QOS) requirements. Further, different subscriptions may provide services on the same or different radio access technologies (RATs). Generally, MSIM solutions use less resources while performing operations on two different RATs than that needed by two independent solutions with the goal of optimizing resource (RF, MIPs, etc.) usage as well as providing enhanced user experience.

[0039] Different classes of radio frequency (RF) solutions exist for communication by MSIM devices. For example, in some cases, the MSIM device may include a dual transceiver that may provide dual receive and dual access (DSD A). For example, in this case, each subscription may correspond to its own transceiver. In other cases, the device may include a single transceiver where two subscriptions share the same radio resources/receive chain. Due to RF complexity, cost, and power consumption considerations, the majority of legacy dual subscription devices and solutions share a single transceiver and the same receive chain. As a consequence, in certain cases, the MSIM device (e.g., user equipment (UE)) may have to suspend a first subscription (e.g., LTE) and tune away (e.g., re-tune one or more receive chains) to allow a second subscription (e.g., NR) to receive paging/perform measurement activity every active/awake duration of a discontinuous reception (DRX) mode (e.g., an active/awake duration of a DRX mode).

[0040] In such cases, during a current active duration of the DRX mode, the user equipment may encounter PDCP holes (e.g., missed packets) on the first subscription due to tune away/re-tuning of the one or more receive chains to the second subscription. These PDCP holes may result in out-of-order delivery of packets at PDCP layer of user equipment during every tune away. Out-of-order data packets may be buffered in a PDCP reordering buffer at the user equipment to allow lower layer recovery of missed packets upon tuning back to the first subscription. However, in some cases, the tune away may cause a scheduler at the base station to stop retransmission of the missed packets during the current active duration, resulting in the missed packets being transmitted in a subsequent active duration.

[0041] For example, in some cases, the scheduler at the base station may stop the retransmission of the missed packets associated with the first subscription during the current active duration because the base station assumes that a high block error ratio (BLER) condition exists between the base station and the UE since the UE fails to provide feedback to the base station regarding the missed packets and the base station is unaware of the UE’s tune away from the first subscription. In other words, the UE’s tune away from the first subscription makes it appear as if a high BLER condition exists between the UE and the base station and, therefore, the scheduler at the base station stops retransmission of the missed packets before the end of the current active duration and proceeds to go to sleep as scheduled at the end of the current active duration. Thereafter, the base station may retransmit the missed packets during a subsequent active duration.

[0042] A similar situation may occur with user equipments that only include one subscription/SIM (e.g., uni-SIM) and that do not perform tune aways to other subscriptions. For example, in some cases, a uni-SIM UE may miss certain packets due to poor channel conditions or interference between the uni-SIM UE and the base station, resulting in a high BLER condition between the uni-SIM UE and the base station. Accordingly, in this case, due to the high BLER condition, the scheduler at the base station may stop retransmission of the missed packets before the end of the current active duration, proceeds to go to sleep as scheduled at the end of the current active duration, and retransmits the missed packets during a subsequent active duration.

[0043] Regardless, in either case (e.g., MSIM UE and tune away or uni-SIM and poor channel conditions/interference), having to wait to transmit the missed packets in the subsequent active duration (e.g., active/awake duration) of the DRX mode may results in scheduling outages at the base station and leads to longer transmission latency and slower data recovery at a media access control (MAC) layer (e.g., hybrid automatic repeat request (HARQ) recovery) and radio link control (RLC) (e.g., ARQ data recovery) levels at the UE.

[0044] Accordingly, to help alleviate these issues, aspects of the present disclosure provide techniques for extending a time associated with the active duration of the DRX mode at the base station. In some cases, such techniques may involve transmitting a scheduling request to the base station upon detecting one or more missing packets, which extending the active duration of the DRX mode at the base station and preventing the scheduler of the base station from going to sleep. By extending the time associated with the active duration of the DRX mode, the scheduler of the base station may stay awake and retransmit the missing packets during the current active duration, avoiding the long transmission latency and slower MAC layer and RLC levels at the UE.

[0045] FIG. 4 is a flow diagram illustrating example operations 500 for wireless communication, for example, for avoiding scheduling outages, in accordance with certain aspects of the present disclosure. The operations 400 may be performed, for example, by a first wireless node (e.g., such as a UE 120a in the wireless communication network 100). Operations 400 may be implemented as software components that are executed and run on one or more processors (e.g., controller/processor 280 of FIG. 2). Further, the transmission and reception of signals by the UE in operations 400 may be enabled, for example, by one or more antennas (e.g., antennas 252 of FIG. 2). In certain aspects, the transmission and/or reception of signals by the UE may be implemented via a bus interface of one or more processors (e.g., controller/processor 280) obtaining and/or outputting signals.

[0046] The operations 400 may begin, at 402, by receiving, via a first subscription, one or more packets of a plurality of packets from a second wireless node during a first duration of a discontinuous reception (DRX) mode. In some cases, the second wireless node from which the first wireless node receives the one or more packets may comprise abase station, such as the base station 110a. Additionally, in some cases, the first duration of the DRX mode may comprise a first active/awake duration of the DRX mode (e.g., as opposed to a duration in which the wireless node is inactive/asleep during the DRX mode).

[0047] At block 404, the first wireless node detects at least one missing packet of the plurality of packets.

[0048] At block 406, the first wireless node transmits a request to the wireless node, requesting resources for transmitting a report associated with the plurality of packets. In some cases, the request may include a scheduling request.

[0049] At block 408, the first wireless node receives the at least one missing packet during the first duration of the DRX mode based, at least in part, on the transmission of the request.

[0050] As noted above, aspects of the present disclosure provide techniques for avoiding scheduling outages at a second wireless node (e.g., base station) by extending a time associated with the first duration of the DRX mode (e.g., first active duration). For example, such techniques may involve triggering an RLC status report transmission by the first wireless node (e.g., UE) upon detecting the at least one missing packet. Triggering the RLC status report may include transmitting a scheduling request to the base station to request resources for transmitting the RLC status report. As a consequence of receiving the scheduling request, the time associated with the first duration of the DRX mode at the base station may be extended, allowing the base station to remain active/awake in the first duration of the DRX mode and to retransmit the at least one missing packet instead of proceeding to go to sleep at the end of the first duration and having to retransmit the at least one missing packet in a subsequent active duration of the DRX mode.

[0051] For example, as noted above, in some cases, the UE may receive, via a first subscription, one or more packets of a plurality of packets from a wireless node during the first duration of the DRX mode. Thereafter, at some point during the first duration, the UE may detect at least one missing packet of the plurality of packets. [0052] In some cases, the UE may miss the at least one missed packet due to a tune away or re-tune of one or more receive chains. For example, in some cases, the UE may be a multi-SIM device, including at least the first subscription and a second subscription. Additionally, in some cases, the UE may only include one transceiver and may thus need to share receive chains for receiving information, tuning and re-tuning the receive chains between the first subscription and second subscription.

[0053] For example, in some cases, the UE may receive the one or more packets of the plurality of packets by tuning or more receive chains of based on the first subscription during the first duration of the DRX mode and may receive the one or more packets of the plurality of packets via the tuned one or more receive chains. Thereafter, to receive information associated with the second subscription, the UE may re-tune, during the first duration of the DRX mode, the one or more receive chains of the UE based on the second subscription and may receive one or more additional packets via the re-tuned one or more receive chains. Accordingly, due to the re-tune of the one or more receive chains of the UE based on the second subscription, the UE may fail to receive the at least one missing packet via the first subscription.

[0054] In other cases, as noted above, the UE may only include single subscription (e.g., uni-SIM) but may still fail to receive the at least one missing packet due to poor channel conditions or interference between the base station and the UE (e.g., causing a high BLER condition between the base station and the UE).

[0055] In some cases, the UE may detect the at least one missing packet based on a sequence number associated with the one or more received packets or segmentation information associated with the one or more received packets. For example, in some cases, each packet of the plurality of packets may be associated with a unique sequence number. Accordingly, the UE may be able to deduce that it has missed the at least one packet by detecting a missing sequence number from the plurality of packets.

[0056] In other cases, the UE may detect the at least one missing packet based on segmentation information associated with the one or more received packets. The segmentation information may include information indicating whether the one or more received packets include a complete service data unit (SDU) or a partial SDU. Accordingly, if the segmentation information includes an indication that the one or more received packets include a complete SDU, the UE may deduce that it is not missing any of the plurality of packets. If, however, the segmentation information includes an indication that the one or more received packets only include a partial SDU, the UE may deduce that it has missed the at least one packet.

[0057] Accordingly, when the UE detects the at least one missing packet and to allow the UE to receive a retransmission of the at least one missing packet during the first duration of the DRX mode, the UE may transmit a scheduling request to the base station requesting resources for transmitting a status report associated with the plurality of packets. Thereafter, the UE may receive a grant indicating resources allocated to the UE for transmitting the report based on the scheduling request. The UE may then transmit the status report to the base station. In some cases, the status report may include acknowledgement information associated with the plurality of packets. For example, in some cases, the acknowledgement information may include at least one acknowledgement indicating that the one or more packets of the plurality of packets were received by the UE. In some cases, the acknowledgement information may, additionally or alternatively, include at least one negative acknowledgement indicating that the UE did not receive the at least one missing packet.

[0058] According to aspects, by transmitting the scheduling request to the base station, a time associated with the first duration of the DRX mode may be extended such that the base station may be able to retransmit the at least one missing packet during the first duration of the DRX mode. For example, by transmitting the scheduling request to the base station, the base station may deduce that the UE has more information that needs to be transmitted and, therefore, may extend the duration of the first duration, staying awake to retransmit the at least one missing packet during the first duration.

[0059] Accordingly, after transmitting the scheduling request to the base station, the UE may receive the at least one missing packet during the first duration of the DRX mode (e.g., based, at least in part, on the transmission of the request). For example, as noted above, in some cases, in response to the scheduling request, the base station may transmit a grant, which may be used by the UE to transmit the status report associated with the plurality of packets. In some cases, the base station may determine which packets of the plurality of packets were missed based on the acknowledgement information in the status report. Accordingly, based on the acknowledgement information in the status report, the base station may determine that the at least one missed packet was not received by the UE and may retransmit the at least one packet to the UE during the extended first duration of the DRX mode, reducing a latency associated with receiving the at least one missing packet as discussed above.

[0060] FIG. 5 illustrates a wireless node 500 that may include various components (e.g., corresponding to means-plus-function components) configured to perform operations for the techniques disclosed herein, such as the operations illustrated in FIG. 4. The wireless node 500 includes a processing system 502 coupled to a transceiver 508 (e.g., a transmitter and/or a receiver). The transceiver 508 is configured to transmit and receive signals for the wireless node 500 via an antenna 510, such as the various signals as described herein. The processing system 502 may be configured to perform processing functions for the wireless node 500, including processing signals received and/or to be transmitted by the wireless node 500.

[0061] The processing system 502 includes a processor 504 coupled to a computer- readable medium/memory 512 via a bus 506. In certain aspects, the computer-readable medium/memory 512 is configured to store instructions (e.g., computer-executable code) that when executed by the processor 504, cause the processor 504 to perform the operations illustrated in FIGs. 4, or other operations for performing the various techniques discussed herein for avoiding scheduling outages. In certain aspects, computer-readable medium/memory 512 stores code 514 for receiving, code 516 for detecting, code 518 for outputting, code 520 for tuning, code 522 for retuning.

[0062] In some cases, the code 514 for receiving, via a first subscription, one or more packets of a plurality of packets from a wireless node during a first duration of a discontinuous reception (DRX) mode.

[0063] In some cases, the code 516 for detecting may include code for detecting at least one missing packet of the plurality of packet.

[0064] In some cases, the code 518 for outputting may include code for outputting, for transmission, a request to the wireless node, requesting resources for transmitting a report associated with the plurality of packets.

[0065] In some cases, the code 514 for receiving may include code for receiving the at least one missing packet during the first duration of the DRX mode based, at least in part, on the transmission of the request. [0066] In some cases, code 514 for receiving may include code for receiving, based on the request, a grant indicating resources allocated to the UE for transmitting the report.

[0067] In some cases, code 518 for outputting may include code for outputting, for transmission, the report via the allocated resources.

[0068] In some cases, code 520 for tuning may include code for tuning one or more receive chains of the UE based on the first subscription.

[0069] In some cases, code 514 for receiving may include code for receiving the one or more packets of the plurality of packets via the tuned one or more receive chains.

[0070] In some cases, code 522 for re-tuning may include code for re-tuning, during the first duration of the DRX mode, the one or more receive chains of the UE based on the second subscription.

[0071] In some cases, code 514 for receiving may include code for receiving one or more additional packets via the re-tuned one or more receive chains.

[0072] In certain aspects, the processor 504 may include circuitry configured to implement the code stored in the computer-readable medium/memory 512, such as for performing the operations illustrated in FIG. 4, as well as other operations described herein for avoiding scheduling outages. For example, the processor 504 includes circuitry 534 for obtaining, circuitry 536 for detecting, circuitry 538 for outputting, circuitry 540 for tuning, circuitry 542 for re-tuning.

[0073] In some cases, the circuitry 534 for obtaining may include circuity for obtaining, via a first subscription, one or more packets of a plurality of packets from a wireless node during a first duration of a discontinuous reception (DRX) mode.

[0074] In some cases, the circuitry 536 for detecting may include circuitry for detecting at least one missing packet of the plurality of packet.

[0075] In some cases, the circuitry 538 for transmitting may include circuitry for transmitting a request to the wireless node, requesting resources for transmitting a report associated with the plurality of packets.

[0076] In some cases, the circuitry 534 for obtainingmay include circuitry for obtainingthe at least one missing packet during the first duration of the DRX mode based, at least in part, on the transmission of the request. [0077] In some cases, circuitry 534 for obtainingmay include circuitry for obtaining, based on the request, a grant indicating resources allocated to the UE for transmitting the report.

[0078] In some cases, circuitry 538 for transmitting may include circuitry for transmitting the report via the allocated resources.

[0079] In some cases, circuitry 540 for tuning may include circuitry for tuning one or more receive chains of the UE based on the first subscription.

[0080] In some cases, circuitry 534 for obtainingmay include circuitry for obtainingthe one or more packets of the plurality of packets via the tuned one or more receive chains.

[0081] In some cases, circuitry 542 for re-tuning may include circuitry for re-tuning, during the first duration of the DRX mode, the one or more receive chains of the UE based on the second subscription.

[0082] In some cases, circuitry 534 for obtainingmay include circuitry for obtainingone or more additional packets via the re-tuned one or more receive chains.

[0083] The techniques described herein may be used for various wireless communication technologies, such as NR (e.g., 5G NR), 3GPP Long Term Evolution (LTE), LTE-Advanced (LTE-A), code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), single-carrier frequency division multiple access (SC-FDMA), time division synchronous code division multiple access (TD- SCDMA), and other networks. The terms “network” and “system” are often used interchangeably. A CDMA network may implement a radio technology such as Universal Terrestrial Radio Access (UTRA), cdma2000, etc. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. cdma2000 covers IS-2000, IS-95 and IS-856 standards. A TDMA network may implement a radio technology such as Global System for Mobile Communications (GSM). An OFDMA network may implement a radio technology such as NR (e.g. 5G RA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash- OFDMA, etc. UTRA and E-UTRA are part of Universal Mobile Telecommunication System (UMTS). LTE and LTE-A are releases of UMTS that use E-UTRA. UTRA, E- UTRA, UMTS, LTE, LTE-A and GSM are described in documents from an organization named “3rd Generation Partnership Project” (3GPP). cdma2000 and UMB are described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2). NR is an emerging wireless communications technology under development.

[0084] In 3GPP, the term “cell” can refer to a coverage area of a Node B (NB) and/or a NB subsystem serving this coverage area, depending on the context in which the term is used. In NR systems, the term “cell” and BS, next generation NodeB (gNB or gNodeB), access point (AP), distributed unit (DU), carrier, or transmission reception point (TRP) may be used interchangeably. A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or other types of cells. 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 subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs having an association with the femto cell (e.g., UEs in a Closed Subscriber Group (CSG), UEs for users in the home, etc.). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS.

[0085] A UE may also be referred to as a mobile station, a wireless node, a wireless communications node, a wireless device, a wireless communications device, a terminal, an access terminal, a subscriber unit, a station, a Customer Premises Equipment (CPE), a cellular phone, 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 computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, an appliance, a medical device or medical equipment, a biometric sensor/device, a wearable device such as a smart watch, smart clothing, smart glasses, a smart wrist band, smart jewelry (e.g., a smart ring, a smart bracelet, etc.), an entertainment device (e.g., a music device, a video device, a satellite radio, etc.), a vehicular component or sensor, a smart meter/sensor, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium. Some UEs may be considered machine-type communication (MTC) devices or evolved MTC (eMTC) devices. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., that may communicate with a BS, another device (e.g., remote device), or some other entity. A wireless node may provide, for example, connectivity for or to a network (e.g., a wide area network such as Internet or a cellular network) via a wired or wireless communication link. Some UEs may be considered Internet-of-Things (loT) devices, which may be narrowband loT (NB-IoT) devices.

[0086] In some examples, access to the air interface may be scheduled. A scheduling entity (e.g., a BS) allocates resources for communication among some or all devices and equipment within its service area or cell. The scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communication, subordinate entities utilize resources allocated by the scheduling entity. Base stations are not the only entities that may function as a scheduling entity. In some examples, a UE may function as a scheduling entity and may schedule resources for one or more subordinate entities (e.g., one or more other UEs), and the other UEs may utilize the resources scheduled by the UE for wireless communication. In some examples, a UE may function as a scheduling entity in a peer- to-peer (P2P) network, and/or in a mesh network. In a mesh network example, UEs may communicate directly with one another in addition to communicating with a scheduling entity.

[0087] The methods disclosed herein comprise one or more steps or actions for achieving the methods. The method steps and/or actions may be interchanged with one another without departing from the scope of the claims. In other words, unless a specific order of steps or actions is specified, the order and/or use of specific steps and/or actions may be modified without departing from the scope of the claims.

[0088] As used herein, a phrase referring to “at least one of’ a list of items refers to any combination of those items, including single members. As an example, “at least one of: a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c).

[0089] As used herein, the term “determining” encompasses a wide variety of actions. For example, “determining” may include calculating, computing, processing, deriving, investigating, looking up (e.g., looking up in a table, a database or another data structure), ascertaining and the like. Also, “determining” may include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory) and the like. Also, “determining” may include resolving, selecting, choosing, establishing and the like.

[0090] The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown herein, but is to be accorded the full scope consistent with the language of the claims, wherein reference to an element in the singular is not intended to mean “one and only one” unless specifically so stated, but rather “one or more.” Unless specifically stated otherwise, the term “some” refers to one or more. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. No claim element is to be construed under the provisions of 35 U.S.C. §112(f) unless the element is expressly recited using the phrase “means for” or, in the case of a method claim, the element is recited using the phrase “step for.”

[0091] The various operations of methods described above may be performed by any suitable means capable of performing the corresponding functions. The means may include various hardware and/or software component(s) and/or module(s), including, but not limited to a circuit, an application specific integrated circuit (ASIC), or processor. Generally, where there are operations illustrated in figures, those operations may have corresponding counterpart means-plus-function components with similar numbering. For example, processors 258, 264 and 266, and/or controller/processor 280 of the UE 120a and/or processors 220, 230, 238, and/or controller/processor 240 of the BS 110a shown in FIG. 2 may be configured to perform operations 400 of FIG. 4.

[0092] Means for receiving may include a transceiver, a receiver or at least one antenna and at least one receive processor illustrated in FIG. 2. Means for transmitting, means for sending or means for outputting may include, a transceiver, a transmitter or at least one antenna and at least one transmit processor illustrated in FIG. 2. Means for detecting, means for tuning, means for re-tuning, and means for failing may include a processing system, which may include one or more processors, such as processors 258, 264 and 266, and/or controller/processor 280 of the UE 120a and/or processors 220, 230, 238, and/or controller/processor 240 of the BS 110a shown in FIG. 2.

[0093] In some cases, rather than actually transmitting a frame a device may have an interface to output a frame for transmission (a means for outputting). For example, a processor may output a frame, via a bus interface, to a radio frequency (RF) front end for transmission. Similarly, rather than actually receiving a frame, a device may have an interface to obtain a frame received from another device (a means for obtaining). For example, a processor may obtain (or receive) a frame, via a bus interface, from an RF front end for reception.

[0094] The various illustrative logical blocks, modules and circuits described in connection with the present disclosure may be implemented or performed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general- purpose processor may be a microprocessor, but in the alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0095] If implemented in hardware, an example hardware configuration may comprise a processing system in a wireless node. The processing system may be implemented with a bus architecture. The bus may include any number of interconnecting buses and bridges depending on the specific application of the processing system and the overall design constraints. The bus may link together various circuits including a processor, machine-readable media, and a bus interface. The bus interface may be used to connect a network adapter, among other things, to the processing system via the bus. The network adapter may be used to implement the signal processing functions of the PHY layer. In the case of a user terminal (see FIG. 1), a user interface (e.g., keypad, display, mouse, joystick, etc.) may also be connected to the bus. The bus may also link various other circuits such as timing sources, peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further. The processor may be implemented with one or more general-purpose and/or special-purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuitry that can execute software. Those skilled in the art will recognize how best to implement the described functionality for the processing system depending on the particular application and the overall design constraints imposed on the overall system.

[0096] If implemented in software, the functions may be stored or transmitted over as one or more instructions or code on a computer readable medium. Software shall be construed broadly to mean instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. Computer-readable media include both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. The processor may be responsible for managing the bus and general processing, including the execution of software modules stored on the machine-readable storage media. A computer-readable storage medium may be coupled to a processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. By way of example, the machine-readable media may include a transmission line, a carrier wave modulated by data, and/or a computer readable storage medium with instructions stored thereon separate from the wireless node, all of which may be accessed by the processor through the bus interface. Alternatively, or in addition, the machine- readable media, or any portion thereof, may be integrated into the processor, such as the case may be with cache and/or general register files. Examples of machine-readable storage media may include, by way of example, RAM (Random Access Memory), flash memory, ROM (Read Only Memory), PROM (Programmable Read-Only Memory), EPROM (Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), registers, magnetic disks, optical disks, hard drives, or any other suitable storage medium, or any combination thereof. The machine-readable media may be embodied in a computer-program product.

[0097] A software module may comprise a single instruction, or many instructions, and may be distributed over several different code segments, among different programs, and across multiple storage media. The computer-readable media may comprise a number of software modules. The software modules include instructions that, when executed by an apparatus such as a processor, cause the processing system to perform various functions. The software modules may include a transmission module and a receiving module. Each software module may reside in a single storage device or be distributed across multiple storage devices. By way of example, a software module may be loaded into RAM from a hard drive when a triggering event occurs. During execution of the software module, the processor may load some of the instructions into cache to increase access speed. One or more cache lines may then be loaded into a general register file for execution by the processor. When referring to the functionality of a software module below, it will be understood that such functionality is implemented by the processor when executing instructions from that software module.

[0098] Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared (IR), radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Blu-ray® disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Thus, in some aspects computer-readable media may comprise non-transitory computer-readable media (e.g., tangible media). In addition, for other aspects computer-readable media may comprise transitory computer- readable media (e.g., a signal). Combinations of the above should also be included within the scope of computer-readable media.

[0099] Thus, certain aspects may comprise a computer program product for performing the operations presented herein. For example, such a computer program product may comprise a computer-readable medium having instructions stored (and/or encoded) thereon, the instructions being executable by one or more processors to perform the operations described herein, for example, instructions for performing the operations described herein and illustrated in FIG. 4, as well as other operations described herein for avoiding scheduling outages. [0100] Further, it should be appreciated that modules and/or other appropriate means for performing the methods and techniques described herein can be downloaded and/or otherwise obtained by a user terminal and/or base station as applicable. For example, such a device can be coupled to a server to facilitate the transfer of means for performing the methods described herein. Alternatively, various methods described herein can be provided via storage means (e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or floppy disk, etc.), such that a user terminal and/or base station can obtain the various methods upon coupling or providing the storage means to the device. Moreover, any other suitable technique for providing the methods and techniques described herein to a device can be utilized.

[0101] It is to be understood that the claims are not limited to the precise configuration and components illustrated above. Various modifications, changes and variations may be made in the arrangement, operation and details of the methods and apparatus described above without departing from the scope of the claims.

Claims

26 CLAIMS

1. A method for wireless communications by a user equipment (UE), comprising: receiving, via a first subscription, one or more packets of a plurality of packets from a wireless node during a first duration of a discontinuous reception (DRX) mode; detecting at least one missing packet of the plurality of packets; transmitting a request to the wireless node, requesting resources for transmitting a report associated with the plurality of packets; and receiving the at least one missing packet during the first duration of the DRX mode based, at least in part, on the transmission of the request.

2. The method of claim 1, wherein the detection of the at least one missing packet is based on at least one of a sequence number associated with the one or more received packets or segmentation information associated with the one or more received packets.

3. The method of claim 2, wherein the segmentation information includes information indicating whether the one or more received packets include a complete service data unit (SDU) or a partial SDU.

4. The method of claim 1, further comprising: receiving, based on the request, a grant indicating resources allocated to the UE for transmitting the report; and transmitting the report via the allocated resources.

5. The method of claim 1 or 4, wherein the report includes acknowledgement information associated with the plurality of packets.

6. The method of claim 5, wherein the acknowledgement information comprises at least one of: at least one acknowledgement indicating that the one or more packets of the plurality of packets were received by the UE; or at least one negative acknowledgement indicating that the UE did not receive the at least one missing packet.

7. The method of claim 1, wherein the transmission of the request extends a time associated with the first duration of the DRX mode.

8. The method of claim 7, wherein the reception of the at least one missing packet occurs during the time associated with the extended duration.

9. The method of claim 1, wherein the transmission of the request reduces a latency associated with receiving the at least one missing packet.

10. The method of claim 1, wherein the UE includes at least the first subscription and a second subscription.

11. The method of claim 1 or 10, wherein the reception of the one or more packets of the plurality of packets comprises: tuning one or more receive chains of the UE based on the first subscription; and receiving the one or more packets of the plurality of packets via the tuned one or more receive chains.

12. The method of claim 11, further comprising: re-tuning, during the first duration of the DRX mode, the one or more receive chains of the UE based on the second subscription; and receiving one or more additional packets via the re-tuned one or more receive chains.

13. The method of claim 12, further comprising failing to receive the at least one missing packet due to the re-tune of the one or more receive chains of the UE based on the second subscription.

14. The method of claim 1, further comprising failing to receive the at least one missing packet due to poor channel conditions or interference between the wireless node and the UE.

15. A user equipment (UE), comprising: means for receiving, via a first subscription, one or more packets of a plurality of packets from a wireless node during a first duration of a discontinuous reception (DRX) mode; means for detecting at least one missing packet of the plurality of packets; means for transmitting a request to the wireless node, requesting resources for transmitting a report associated with the plurality of packets; and means for receiving the at least one missing packet during the first duration of the DRX mode based, at least in part, on the transmission of the request.

16. The UE of claim 15, wherein the detection of the at least one missing packet is based on at least one of a sequence number associated with the one or more received packets or segmentation information associated with the one or more received packets.

17. The UE of claim 16, wherein the segmentation information includes information indicating whether the one or more received packets include a complete service data unit (SDU) or a partial SDU.

18. The UE of claim 15, further comprising: means for receiving, based on the request, a grant indicating resources allocated to the UE for transmitting the report; and means for transmitting the report via the allocated resources.

19. The UE of claim 15 or 18, wherein the report includes acknowledgement information associated with the plurality of packets.

20. The UE of claim 19, wherein the acknowledgement information comprises at least one of: at least one acknowledgement indicating that the one or more packets of the plurality of packets were received by the UE; or at least one negative acknowledgement indicating that the UE did not receive the at least one missing packet. 29

21. The UE of claim 15, wherein the transmission of the request extends a time associated with the first duration of the DRX mode.

22. The UE of claim 21, wherein the reception of the at least one missing packet occurs during the time associated with the extended duration.

23. The UE of claim 15, wherein the transmission of the request reduces a latency associated with receiving the at least one missing packet.

24. The UE of claim 15, wherein the UE includes at least the first subscription and a second subscription.

25. The UE of claim 15 or 24, wherein the means for receiving the one or more packets of the plurality of packets comprises: means for tuning one or more receive chains of the UE based on the first subscription; and means for receiving the one or more packets of the plurality of packets via the tuned one or more receive chains.

26. The UE of claim 25, further comprising: means for re-tuning, during the first duration of the DRX mode, the one or more receive chains of the UE based on the second subscription; and means for receiving one or more additional packets via the re-tuned one or more receive chains.

27. The UE of claim 26, wherein the means for receiving fails to receive the at least one missing packet due to the re-tune of the one or more receive chains of the UE based on the second subscription.

28. The UE of claim 15, wherein the means for receiving fails to receive the at least one missing packet due to poor channel conditions or interference between the wireless node and the UE.

29. A user equipment (UE), comprising: 30 a receiver configured to receive, via a first subscription, one or more packets of a plurality of packets from a wireless node during a first duration of a discontinuous reception (DRX) mode; a processing system configured to detect at least one missing packet of the plurality of packets; and a transmitter configured transmit a request to the wireless node, requesting resources for transmitting a report associated with the plurality of packets, wherein: the receiver is further configured to receive the at least one missing packet during the first duration of the DRX mode based, at least in part, on the transmission of the request.

30. The UE of claim 29, wherein the detection of the at least one missing packet is based on at least one of a sequence number associated with the one or more received packets or segmentation information associated with the one or more received packets.

31. The UE of claim 30, wherein the segmentation information includes information indicating whether the one or more received packets include a complete service data unit (SDU) or a partial SDU.

32. The UE of claim 29, wherein: the receiver is further configured to receive, based on the request, a grant indicating resources allocated to the UE for transmitting the report; and the transmitter is further configured to transmit the report via the allocated resources.

33. The UE of claim 29 or32, wherein the report includes acknowledgement information associated with the plurality of packets.

34. The UE of claim 33, wherein the acknowledgement information comprises at least one of: at least one acknowledgement indicating that the one or more packets of the plurality of packets were received by the UE; or 31 at least one negative acknowledgement indicating that the UE did not receive the at least one missing packet.

35. The UE of claim 29, wherein the transmission of the request extends a time associated with the first duration of the DRX mode.

36. The UE of claim 35, wherein the reception of the at least one missing packet occurs during the time associated with the extended duration.

37. The UE of claim 29, wherein the transmission of the request reduces a latency associated with receiving the at least one missing packet.

38. The UE of claim 29, wherein the UE includes at least the first subscription and a second subscription.

39. The UE of claim 29 or 38, wherein the reception of the one or more packets of the plurality of packets comprises: tuning one or more receive chains of the UE based on the first subscription; and receiving the one or more packets of the plurality of packets via the tuned one or more receive chains.

40. The UE of claim 39, wherein: the processing system is further configured to re-tune, during the first duration of the DRX mode, the one or more receive chains of the UE based on the second subscription; and the receiver is further configured to receive one or more additional packets via the re-tuned one or more receive chains.

41. The UE of claim 40, wherein the receiver fails to receive the at least one missing packet due to the re-tune of the one or more receive chains of the UE based on the second subscription. 32

42. The UE of claim 29, wherein the receiver fails to receive the at least one missing packet due to poor channel conditions or interference between the wireless node and the UE.

43. An apparatus for wireless communications, comprising: an interface configured to obtain, via a first subscription, one or more packets of a plurality of packets from a wireless node during a first duration of a discontinuous reception (DRX) mode; and a processing system configured to detect at least one missing packet of the plurality of packets, wherein: the interface is further configured to output, for transmission, a request to the wireless node, requesting resources for transmitting a report associated with the plurality of packets; and the interface is further configured to obtain the at least one missing packet during the first duration of the DRX mode based, at least in part, on the transmission of the request.

44. A computer-readable medium for wireless communications, comprising codes executable to: obtain, via a first subscription, one or more packets of a plurality of packets from a wireless node during a first duration of a discontinuous reception (DRX) mode; detect at least one missing packet of the plurality of packets; output, for transmission, a request to the wireless node, requesting resources for transmitting a report associated with the plurality of packets; and obtain the at least one missing packet during the first duration of the DRX mode based, at least in part, on the transmission of the request.