Dynamic retransmission for wireless communication
Patent Information
- Application Number
- PCT/CN2025/079441
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2026-09-03
Smart Images

Figure CN2025079441_03092026_PF_FP_ABST
Abstract
Description
DYNAMIC RETRANSMISSION FOR WIRELESS COMMUNICATIONFIELD OF THE DISCLOSURE
[0001] The present disclosure relates generally to wireless communications, and more specifically to a dynamic retransmission scheme for tight latency services for power optimized wearable devices, such as extended reality (XR) glasses.BACKGROUND
[0002] Wireless communications systems are widely deployed to provide various telecommunications services such as telephony, video, data, messaging, and broadcasts. Typical wireless communications systems may employ multiple-access technologies capable of supporting communications with multiple users by sharing available system resources (e.g., bandwidth, transmit power, and / or the like) . 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) . Narrowband (NB) -Internet of things (IoT) and enhanced machine-type communications (eMTC) are a set of enhancements to LTE for machine type communications.
[0003] A wireless communications network may include a number of base stations (BSs) that can support communications for a number of user equipment (UEs) . A user equipment (UE) may communicate with a base station (BS) via the downlink and uplink. The downlink (or forward link) refers to the communication link from the BS to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail, a BS may be referred to as a Node B, an evolved Node B (eNB) , a gNB, an access point (AP) , a radio head, a transmit and receive point (TRP) , a new radio (NR) BS, a 5G Node B, and / or the like.
[0004] The above multiple access technologies have been adopted in various telecommunications standards to provide a common protocol that enables different user equipment to communicate on a municipal, national, regional, and even global level. New radio (NR) , which may also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (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 orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL) , using CP-OFDM and / or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM) ) on the uplink (UL) , as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.SUMMARY
[0005] In aspects of the present disclosure, a method for wireless communication includes generating a number of packets, a dynamically configured percentage of the number of packets carrying information about prior packets. The method also includes transmitting the number of packets across a wireless interface.
[0006] In other aspects of the present disclosure, a method of wireless communication by a network device includes transmitting parameter thresholds for dynamically configuring a percentage of a number of packets that will carry information about prior packets. The method also includes receiving the number of packets across a wireless interface.
[0007] Other aspects of the present disclosure are directed to an apparatus. The apparatus has one or more memories and one or more processors coupled to the one or more memories. The processor (s) is configured to generate a number of packets, a dynamically configured percentage of the number of packets carrying information about prior packets. The processor (s) is also further configured to transmit the number of packets across a wireless interface.
[0008] Aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, wireless communication device, and processing system as substantially described with reference to and as illustrated by the accompanying drawings and specification.
[0009] The foregoing has outlined rather broadly the features and technical advantages of examples according to the disclosure in order that the detailed description that follows may be better understood. Additional features and advantages will be described. The conception and specific examples disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. Characteristics of the concepts disclosed, both their organization and method of operation, together with associated advantages will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purposes of illustration and description, and not as a definition of the limits of the claims.BRIEF DESCRIPTION OF THE DRAWINGS
[0010] So that features of the present disclosure can be understood in detail, a particular description may be had by reference to aspects, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only certain 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. The same reference numbers in different drawings may identify the same or similar elements.
[0011] FIGURE 1 is a block diagram conceptually illustrating an example of a wireless communications network, in accordance with various aspects of the present disclosure.
[0012] FIGURE 2 is a block diagram conceptually illustrating an example of a base station in communication with a user equipment (UE) in a wireless communications network, in accordance with various aspects of the present disclosure.
[0013] FIGURE 3 is a block diagram illustrating an example disaggregated base station architecture, in accordance with various aspects of the present disclosure.
[0014] FIGURE 4 is a diagram illustrating extended reality (XR) communications, in accordance with various aspects of the present disclosure.
[0015] FIGURE 5 is a timeline illustrating packets carrying information of previous packets, in accordance with various aspects of the present disclosure.
[0016] FIGURE 6 is a timeline illustrating packets carrying information of previous packets based on packet type, in accordance with various aspects of the present disclosure.
[0017] FIGURE 7 is a block diagram illustrating traffic encoded with different content layers having different resolutions, in accordance with various aspects of the present disclosure.
[0018] FIGURE 8 is a flow diagram illustrating an example process performed, for example, by a user equipment (UE) , in accordance with various aspects of the present disclosure.
[0019] FIGURE 9 is a flow diagram illustrating an example process performed, for example, by a network device, in accordance with various aspects of the present disclosure.DETAILED DESCRIPTION
[0020] Various aspects of the disclosure are described more fully below with reference to the accompanying drawings. This disclosure may, however, be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Based on the teachings, one skilled in the art should appreciate that the scope of the disclosure is intended to cover any aspect of the disclosure, whether implemented independently of or combined with any other aspect of the disclosure. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth. 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. It should be understood that any aspect of the disclosure disclosed may be embodied by one or more elements of a claim.
[0021] Several aspects of telecommunications systems will now be presented with reference to various apparatuses and techniques. These apparatuses 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, and / or the like (collectively referred to as “elements” ) . These elements may be implemented using hardware, software, or combinations thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.
[0022] It should be noted that while aspects may be described using terminology commonly associated with 5G and later wireless technologies, aspects of the present disclosure can be applied in other generation-based communications systems, such as and including 3G and / or 4G technologies.
[0023] Extended reality (XR) includes augmented reality (AR) , virtual reality (VR) , and mixed reality (MR) . Augmented reality (AR) merges the real world with virtual objects to support realistic, intelligent, and personalized experiences. Virtual reality (VR) simulates physical presence in real or imagined worlds, and enables the user to interact in that world. Mixed reality (MR) merges features from VR and AR, such that virtual objects are integrated into reality by interacting with real word objects. Realizing XR requires the next level of artificial intelligence (AI) and connectivity within the thermal and power envelopes of a wearable device, such as eyeglasses.
[0024] Low latency and high reliability are specified for XR applications. Latency refers to a delay. For example, in a split rendering structure, latency is the time between when data (such as a video frame, pose, or audio traffic) is sent from an XR terminal and when the rendered data is received by the XR terminal. When latency causes a frame to arrive at a receiver later than specified in the packet delay budget (PDB) , the frame is deemed to be a failure.
[0025] According to legacy mechanisms, when a data packet is not successfully received, a transmitter may retransmit the failed packet. Legacy schemes for data retransmission are reactive. That is, when a transmitter learns of the packet loss or failure to decode at the receiver side, then the transmitter retransmits the packet, possibly at a lower code rate in order to improve reliability. Thus, the retransmission occurs based on prior loss or failure. For tight latency services such as XR applications, a reactive process may not be beneficial because the retransmission may exceed latency specifications, for example, 10 milliseconds (ms) or less.
[0026] In a proactive scheme, the transmitter autonomously duplicates prior packets. As an example, a second packet carries information of a first packet, a third packet carries information of the second packet, and so forth. However, it may not be necessary or efficient for all packets to carry additional information of prior packets because more load and resources are required to carry the additional information. Moreover, carrying fixed high resolution information consumes considerable additional resources. On some occasions, low resolution packets carrying fewer pixels may be sufficient and may be preferable to receiving no information at all.
[0027] According to aspects of the present disclosure, a dynamically configured percentage P (or ratio) of packets carrying information of the prior packet is a dynamic function of channel state information (CSI) , a congestion state, available resources (e.g., how many resources a user equipment (UE) is granted) , and a historic loss ratio. In other aspects of the present disclosure, for uplink (UL) transmissions, a network device such as a base station (e.g., gNB) configures thresholds at the UE for the parameters of CSI, a congestion state, and a historic loss ratio. According to further aspects of the present disclosure, for downlink (DL) communications, the network device determines the percentage P of packets carrying information of prior packets, and the network device indicates, to the UE, specific packets that will carry information about the prior packets. According to still further aspects of the present disclosure, the percentage P of packets that carry information about the prior packets depends on the type or importance of the prior packet. According to additional aspects of the present disclosure, the carried information about the prior packet may be adaptively adjusted between high resolution and low resolution.
[0028] Particular aspects of the subject matter described in this disclosure can be implemented to realize one or more of the following potential advantages. In some examples, the described techniques, such as dynamic retransmissions may reduce latency and improve reliability for wireless data traffic, such as XR traffic.
[0029] FIGURE 1 is a diagram illustrating a wireless network 100 in which aspects of the present disclosure may be practiced. The wireless network 100 may be a 5G or NR network or some other wireless network, such as an LTE network. The wireless network 100 may include a number of BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A BS is a network device or a network entity that communicates with user equipment (UEs) and may also be referred to as a base station, an NR BS, a Node B, a gNB, a 5G Node B, an access point, a transmit and receive point (TRP) , a network node, a network entity, and / or the like. A base station can be implemented as an aggregated base station, as a disaggregated base station, an integrated access and backhaul (IAB) node, a relay node, a sidelink node, etc. The base station can be implemented in an aggregated or monolithic base station architecture, or alternatively, in a disaggregated base station architecture, and may include one or more of a central unit (CU) , a distributed unit (DU) , a radio unit (RU) , a near-real time (near-RT) RAN intelligent controller (RIC) , or a non-real time (non-RT) RIC.
[0030] Each BS may provide communications coverage for a particular geographic area. In 3GPP, the term “cell” can refer to a coverage area of a BS and / or a BS subsystem serving this coverage area, depending on the context in which the term is used.
[0031] A BS may provide communications 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 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 association 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 the example shown in FIGURE 1, a BS 110a may be a macro BS for a macro cell 102a, a BS 110b may be a pico BS for a pico cell 102b, and a BS 110c may be a femto BS for a femto cell 102c. A BS may support one or multiple (e.g., three) cells. The terms “eNB, ” “base station, ” “NR BS, ” “gNB, ” “AP, ” “Node B, ” “5G NB, ” “TRP, ” and “cell” may be used interchangeably.
[0032] In some aspects, a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile BS. In some aspects, the BSs may be interconnected to one another and / or to one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces such as a direct physical connection, a virtual network, and / or the like using any suitable transport network.
[0033] The wireless network 100 may also include relay stations. A relay station is an entity that can receive a transmission of data from an upstream station (e.g., a BS or a UE) and send a transmission 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. In the example shown in FIGURE 1, a relay station 110d may communicate with macro BS 110a and a UE 120d in order to facilitate communications between the BS 110a and UE 120d. A relay station may also be referred to as a relay BS, a relay base station, a relay, and / or the like.
[0034] The wireless network 100 may be a heterogeneous network that includes BSs of different types (e.g., macro BSs, pico BSs, femto BSs, relay BSs, and / or the like) . These different types of BSs may have different transmit power levels, different coverage areas, and different impact on interference in the wireless network 100. For example, macro BSs may have a high transmit power level (e.g., 5 to 40 watts) whereas pico BSs, femto BSs, and relay BSs may have lower transmit power levels (e.g., 0.1 to 2 watts) .
[0035] As an example, the BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and the core network 130 may exchange communications via backhaul links 132 (e.g., S1, etc. ) . Base stations 110 may communicate with one another over other backhaul links (e.g., X2, etc. ) either directly or indirectly (e.g., through core network 130) .
[0036] The core network 130 may be an evolved packet core (EPC) , which may include at least one mobility management entity (MME) , at least one serving gateway (S-GW) , and at least one packet data network (PDN) gateway (P-GW) . The MME may be the control node that processes the signaling between the UEs 120 and the EPC. All user Internet protocol (IP) packets may be transferred through the S-GW, which itself may be connected to the P-GW. The P-GW may provide IP address allocation as well as other functions. The P-GW may be connected to the network operator's IP services. The operator's IP services may include the Internet, the Intranet, an IP multimedia subsystem (IMS) , and a packet-switched (PS) streaming service.
[0037] The core network 130 may provide user authentication, access authorization, tracking, IP connectivity, and other access, routing, or mobility functions. One or more of the base stations 110 or access node controllers (ANCs) may interface with the core network 130 through backhaul links 132 (e.g., S1, S2, etc. ) and may perform radio configuration and scheduling for communications with the UEs 120. In some configurations, various functions of each access network entity or base station 110 may be distributed across various network devices (e.g., radio heads and access network controllers) or consolidated into a single network device (e.g., a base station 110) .
[0038] UEs 120 (e.g., 120a, 120b, 120c) may be dispersed throughout the wireless network 100, and each UE may be stationary or mobile. A UE may also be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, and / or the like. A 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, biometric sensors / devices, wearable devices (smart watches, smart clothing, smart glasses, smart wrist bands, smart jewelry (e.g., smart ring, smart bracelet) ) , an entertainment device (e.g., a music or video device, or a satellite radio) , a vehicular component or sensor, smart meters / sensors, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium.
[0039] One or more UEs 120 may establish a protocol data unit (PDU) session for a network slice. In some cases, the UE 120 may select a network slice based on an application or subscription service. By having different network slices serving different applications or subscriptions, the UE 120 may improve its resource utilization in the wireless network 100, while also satisfying performance specifications of individual applications of the UE 120. In some cases, the network slices used by UE 120 may be served by an AMF (not shown in FIGURE 1) associated with one or both of the base station 110 or core network 130. In addition, session management of the network slices may be performed by an access and mobility management function (AMF) .
[0040] The UEs 120 may include a dynamic retransmission (ReTx) module 140. For brevity, only one UE 120d is shown as including the dynamic ReTx module 140. The dynamic ReTx module 140 may generate a number of packets, a dynamically configured percentage of the number of packets carrying information about prior packets. The dynamic ReTx module 140 may transmit the number of packets across a wireless interface.
[0041] The core network 130 or the base stations 110 or any other network device (e.g., as seen in FIGURE 3) may include a dynamic ReTx module 138. For brevity, only one base station 110a is shown as including the dynamic ReTx module 138. The dynamic ReTx module 138 may transmit parameter thresholds for dynamically configuring a percentage of a number of packets that will carry information about prior packets. The dynamic ReTx module 138 may receive the number of packets across a wireless interface.
[0042] Some UEs may be considered machine-type communications (MTC) or evolved or enhanced machine-type communications (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, and / or the like, that may communicate with a base station, 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 (IoT) devices, and / or may be implemented as NB-IoT (narrowband internet of things) devices. Some UEs may be considered a customer premises equipment (CPE) . UE 120 may be included inside a housing that houses components of UE 120, such as processor components, memory components, and / or the like.
[0043] 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, and / or the like. A frequency may also be referred to as a carrier, a frequency channel, and / or the like. Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.
[0044] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., without using a base station 110 as an intermediary to communicate with one another) . For example, the UEs 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (e.g., which may include a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure (V2I) protocol, and / or the like) , a mesh network, and / or the like. In this case, the UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere as being performed by the base station 110. For example, the base station 110 may configure a UE 120 via downlink control information (DCI) , radio resource control (RRC) signaling, a media access control-control element (MAC-CE) or via system information (e.g., a system information block (SIB) .
[0045] As indicated above, FIGURE 1 is provided merely as an example. Other examples may differ from what is described with regard to FIGURE 1.
[0046] FIGURE 2 shows a block diagram of a design 200 of the base station 110 and UE 120, which may be one of the base stations and one of the UEs in FIGURE 1. The base station 110 may be equipped with T antennas 234a through 234t, and UE 120 may be equipped with R antennas 252a through 252r, where in general T ≥ 1 and R ≥ 1.
[0047] At the base station 110, a transmit processor 220 may receive data from a data source 212 for one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQIs) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS (s) selected for the UE, and provide data symbols for all UEs. Decreasing the MCS lowers throughput but increases reliability of the transmission. The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI) and / or the like) and control information (e.g., CQI requests, grants, upper layer signaling, and / or the like) and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., the cell-specific reference signal (CRS) ) and synchronization signals (e.g., the primary synchronization signal (PSS) and secondary synchronization signal (SSS) ) . A transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and / or the reference symbols, if 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 orthogonal frequency division multiplexing (OFDM) and / or the like) 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. T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively. According to various aspects described in more detail below, the synchronization signals can be generated with location encoding to convey additional information.
[0048] At the UE 120, antennas 252a through 252r may receive the downlink signals from the base station 110 and / or other base stations and may provide received signals to demodulators (DEMODs) 254a through 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM and / or the like) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for the UE 120 to a data sink 260, and provide decoded control information and system information to a controller / processor 280. A channel processor may determine reference signal received power (RSRP) , received signal strength indicator (RSSI) , reference signal received quality (RSRQ) , channel quality indicator (CQI) , and / or the like. In some aspects, one or more components of the UE 120 may be included in a housing.
[0049] 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 comprising RSRP, RSSI, RSRQ, CQI, and / or the like) from the controller / processor 280. 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 if applicable, further processed by modulators 254a through 254r (e.g., for discrete Fourier transform spread OFDM (DFT-s-OFDM) , CP-OFDM, and / or the like) , and transmitted to the base station 110. At the base station 110, the uplink signals from the UE 120 and other UEs may be received by the antennas 234, processed by the demodulators 254, 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 120. The receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to a controller / processor 240. The base station 110 may include communications unit 244 and communicate to the core network 130 via the communications unit 244. The core network 130 may include a communications unit 294, a controller / processor 290, and a memory 292.
[0050] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or any other component (s) of FIGURE 2 may perform one or more techniques associated with dynamic retransmissions, as described in more detail elsewhere. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or any other component (s) of FIGURE 2 may perform or direct operations of, for example, the processes of FIGURES 8 and 9 and / or other processes as described. Memories 242 and 282 may store data and program codes for the base station 110 and UE 120, respectively. A scheduler 246 may schedule UEs for data transmission on the downlink and / or uplink.
[0051] In some aspects, the UE 120 and / or base station 110 may include means for generating, means for transmitting, means for receiving, means for adjusting, means for setting, means for adaptively setting, and means for configuring. Such means may include one or more components of the UE 120 or base station 110 described in connection with FIGURE 2.
[0052] As indicated above, FIGURE 2 is provided merely as an example. Other examples may differ from what is described with regard to FIGURE 2.
[0053] Deployment of communication systems, such as 5G new radio (NR) systems, may be arranged in multiple manners with various components or constituent parts. In a 5G NR system, or network, a network node, a network entity, a mobility element of a network, a radio access network (RAN) node, a core network node, a network element, or a network equipment, such as a base station (BS) , or one or more units (or one or more components) performing base station functionality, may be implemented in an aggregated or disaggregated architecture. For example, a BS (such as a Node B (NB) , an evolved NB (eNB) , an NR BS, 5G NB, an access point (AP) , a transmit and receive point (TRP) , or a cell, etc. ) may be implemented as an aggregated base station (also known as a standalone BS or a monolithic BS) or a disaggregated base station.
[0054] An aggregated base station may be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node. A disaggregated base station may be configured to utilize a protocol stack that is physically or logically distributed among two or more units (such as one or more central or centralized units (CUs) , one or more distributed units (DUs) , or one or more radio units (RUs) ) . In some aspects, a CU may be implemented within a RAN node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed throughout one or multiple other RAN nodes. The DUs may be implemented to communicate with one or more RUs. Each of the CU, DU, and RU also can be implemented as virtual units (e.g., a virtual central unit (VCU) , a virtual distributed unit (VDU) , or a virtual radio unit (VRU) ) .
[0055] Base station-type operations or network designs may consider aggregation characteristics of base station functionality. For example, disaggregated base stations may be utilized in an integrated access backhaul (IAB) network, an open radio access network (O-RAN (such as the network configuration sponsored by the O-RAN Alliance) ) , or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN) ) . Disaggregation may include distributing functionality across two or more units at various physical locations, as well as distributing functionality for at least one unit virtually, which can enable flexibility in network design. The various units of the disaggregated base station, or disaggregated RAN architecture, can be configured for wired or wireless communication with at least one other unit.
[0056] In some cases, different types of devices supporting different types of applications and / or services may coexist in a cell. Examples of different types of devices include UE handsets, customer premises equipment (CPEs) , vehicles, Internet of Things (IoT) devices, and / or the like. Examples of different types of applications include ultra-reliable low-latency communications (URLLC) applications, massive machine-type communications (mMTC) applications, enhanced mobile broadband (eMBB) applications, vehicle-to-anything (V2X) applications, and / or the like. Furthermore, in some cases, a single device may support different applications or services simultaneously.
[0057] FIGURE 3 shows a diagram illustrating an example disaggregated base station 300 architecture. The disaggregated base station 300 architecture may include one or more central units (CUs) 310 that can communicate directly with a core network 320 via a backhaul link, or indirectly with the core network 320 through one or more disaggregated base station units (such as a near-real time (near-RT) RAN intelligent controller (RIC) 325 via an E2 link, or a non-real time (non-RT) RIC 315 associated with a service management and orchestration (SMO) framework 305, or both) . A CU 310 may communicate with one or more distributed units (DUs) 330 via respective midhaul links, such as an F1 interface. The DUs 330 may communicate with one or more radio units (RUs) 340 via respective fronthaul links. The RUs 340 may communicate with respective UEs 120 via one or more radio frequency (RF) access links. In some implementations, the UE 120 may be simultaneously served by multiple RUs 340.
[0058] Each of the units (e.g., the CUs 310, the DUs 330, the RUs 340, as well as the near-RT RICs 325, the non-RT RICs 315, and the SMO framework 305) may include one or more interfaces or be coupled to one or more interfaces configured to receive or transmit signals, data, or information (collectively, signals) via a wired or wireless transmission medium. Each of the units, or an associated processor or controller providing instructions to the communication interfaces of the units, can be configured to communicate with one or more of the other units via the transmission medium. For example, the units can include a wired interface configured to receive or transmit signals over a wired transmission medium to one or more of the other units. Additionally, the units can include a wireless interface, which may include a receiver, a transmitter or transceiver (such as a radio frequency (RF) transceiver) , configured to receive or transmit signals, or both, over a wireless transmission medium to one or more of the other units.
[0059] In some aspects, the CU 310 may host one or more higher layer control functions. Such control functions can include radio resource control (RRC) , packet data convergence protocol (PDCP) , service data adaptation protocol (SDAP) , or the like. Each control function can be implemented with an interface configured to communicate signals with other control functions hosted by the CU 310. The CU 310 may be configured to handle user plane functionality (e.g., central unit –user plane (CU-UP) ) , control plane functionality (e.g., central unit –control Plane (CU-CP) ) , or a combination thereof. In some implementations, the CU 310 can be logically split into one or more CU-UP units and one or more CU-CP units. The CU-UP unit can communicate bi-directionally with the CU-CP unit via an interface, such as the E1 interface when implemented in an O-RAN configuration. The CU 310 can be implemented to communicate with the DU 330, as necessary, for network control and signaling.
[0060] The DU 330 may correspond to a logical unit that includes one or more base station functions to control the operation of one or more RUs 340. In some aspects, the DU 330 may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, or the like) depending, at least in part, on a functional split, such as those defined by the Third Generation Partnership Project (3GPP) . In some aspects, the DU 330 may further host one or more low PHY layers. Each layer (or module) can be implemented with an interface configured to communicate signals with other layers (and modules) hosted by the DU 330, or with the control functions hosted by the CU 310.
[0061] Lower-layer functionality can be implemented by one or more RUs 340. In some deployments, an RU 340, controlled by a DU 330, may correspond to a logical node that hosts RF processing functions, or low-PHY layer functions (such as performing fast Fourier transform (FFT) , inverse FFT (iFFT) , digital beamforming, physical random access channel (PRACH) extraction and filtering, or the like) , or both, based at least in part on the functional split, such as a lower layer functional split. In such an architecture, the RU (s) 340 can be implemented to handle over the air (OTA) communication with one or more UEs 120. In some implementations, real-time and non-real-time aspects of control and user plane communication with the RU (s) 340 can be controlled by the corresponding DU 330. In some scenarios, this configuration can enable the DU (s) 330 and the CU 310 to be implemented in a cloud-based RAN architecture, such as a vRAN architecture.
[0062] The SMO framework 305 may be configured to support RAN deployment and provisioning of non-virtualized and virtualized network elements. For non-virtualized network elements, the SMO framework 305 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which may be managed via an operations and maintenance interface (such as an O1 interface) . For virtualized network elements, the SMO framework 305 may be configured to interact with a cloud computing platform (such as an open cloud (O-cloud) 390) to perform network element life cycle management (such as to instantiate virtualized network elements) via a cloud computing platform interface (such as an O2 interface) . Such virtualized network elements can include, but are not limited to, CUs 310, DUs 330, RUs 340, and near-RT RICs 325. In some implementations, the SMO framework 305 can communicate with a hardware aspect of a 4G RAN, such as an open eNB (O-eNB) 311, via an O1 interface. Additionally, in some implementations, the SMO framework 305 can communicate directly with one or more RUs 340 via an O1 interface. The SMO framework 305 also may include a non-RT RIC 315 configured to support functionality of the SMO framework 305.
[0063] The non-RT RIC 315 may be configured to include a logical function that enables non-real-time control and optimization of RAN elements and resources, artificial intelligence / machine learning (AI / ML) workflows including model training and updates, or policy-based guidance of applications / features in the near-RT RIC 325. The non-RT RIC 315 may be coupled to or communicate with (such as via an A1 interface) the near-RT RIC 325. The near-RT RIC 325 may be configured to include a logical function that enables near-real-time control and optimization of RAN elements and resources via data collection and actions over an interface (such as via an E2 interface) connecting one or more CUs 310, one or more DUs 330, or both, as well as the O-eNB 311, with the near-RT RIC 325.
[0064] In some implementations, to generate AI / ML models to be deployed in the near-RT RIC 325, the non-RT RIC 315 may receive parameters or external enrichment information from external servers. Such information may be utilized by the near-RT RIC 325 and may be received at the SMO framework 305 or the non-RT RIC 315 from non-network data sources or from network functions. In some examples, the non-RT RIC 315 or the near-RT RIC 325 may be configured to tune RAN behavior or performance. For example, the non-RT RIC 315 may monitor long-term trends and patterns for performance and employ AI / ML models to perform corrective actions through the SMO framework 305 (such as reconfiguration via O1) or via creation of RAN management policies (such as A1 policies) .
[0065] Extended reality (XR) includes augmented reality (AR) , virtual reality (VR) , and mixed reality (MR) . Augmented reality (AR) merges the real world with virtual objects to support realistic, intelligent, and personalized experiences. Conventional augmented reality applications provide a live view of a real world environment, in which elements may be augmented by computer-generated sensory input such as video, sound, graphics, or global positioning system (GPS) data. With such applications, a view of reality may be modified by a computing device to enhance a user's perception of reality and provide more information about the user's environment. Virtual reality (VR) simulates physical presence in real or imagined worlds, and enables the user to interact in that world. Mixed reality (MR) merges features from VR and AR such that virtual objects are integrated into reality by interacting with real word objects. Realizing XR requires the next level of artificial intelligence (AI) and connectivity within the thermal and power envelopes of a wearable device, such as eyeglasses.
[0066] Low latency and high reliability are specified for XR applications. For example, 99%, 99.9%, and even 99.99%packets of XR traffic should be delivered within a packet delay budget (PDB) requirement, for example, 20 ms, 15 ms, 10 ms, and even less than 10 ms. When latency causes a frame to arrive at a receiver later than specified in the PDB, the frame is deemed to be a failure. High speed, low latency, and high reliability wireless connectivity is expected to support extended reality (XR) applications.
[0067] FIGURE 4 is a diagram illustrating extended reality (XR) communications, in accordance with various aspects of the present disclosure. In the example of FIGURE 4, a network device 410 communicates with a UE (e.g., XR headset) 420 and an edge cloud 430 that may include servers for game rendering. The uplink from the UE 420 to the network device 410 may carry 100 bytes at 500 Hertz (Hz) , whereas the downlink from the network device 410 to the UE 420 may carry more than 100 kilobytes at 45-90 frames per second (FPS) .
[0068] When a data packet is not successfully received, a transmitter may retransmit the failed packet. Legacy schemes for data retransmission are reactive. That is, when a transmitter learns of the packet loss or failure to decode at the receiver side, then the transmitter retransmits the packet, possibly at a lower code rate in order to improve reliability. Thus, the retransmission occurs based on prior loss or failure. For tight latency services such as XR applications, a reactive process may not be beneficial because the retransmission may exceed latency specifications, for example, 10 ms or less.
[0069] In a proactive scheme, the transmitter autonomously duplicates prior packets. As an example, a second packet carries information of a first packet, a third packet carries information of the second packet, and so forth. However, it may not be necessary or efficient for all packets to carry additional information of prior packets because more load and resources are required to carry the additional information. Moreover, carrying fixed high resolution information consumes the limited resources allocated to XR application and / or device. On some occasions, low resolution packets carrying fewer pixels may be sufficient and may be preferable to receiving no information at all.
[0070] According to aspects of the present disclosure, a dynamically configured percentage P (or ratio) of packets carrying information of the prior packet is a dynamic function of channel state information (CSI) , a congestion state, available resources (e.g., how many resources a UE is granted) , and a historic loss ratio. An example of a congestion state is an explicit congestion notification (ECN) marking. An ECN-based congestion mechanism has been specified for XR. With this mechanism, the network device reports the percentage of uplink and downlink IP packets that should be ECN marked for a quality of service (QoS) flow. A historic loss ratio is the history of how many packets were lost. The percentage P may be calculated, as follows: P=f (CSI, congestion, available resources, loss ratio)
[0071] If the UE has a good CSI (e.g., channel state or signal-to-interference plus noise ratio (SINR) ) and a low historic loss ratio, while the available resources are limited and congestion is considerable, the percentage P should be lowered. The percentage P should be lowered because carrying additional information for the previous packet is not needed when the UE has a good channel state or SINR, and a low historic loss ratio. Moreover, lowering the percentage P can mitigate congestion and reduce the resources needed for transmission. If the UE does not have a good channel state or SINR and a low historic loss ratio, or the resources are not limited or congestion is low, then the percentage P should be increased to improve reliability.
[0072] In other aspects of the present disclosure, for uplink (UL) transmissions, a network device such as a base station (e.g., gNB) configures thresholds at the UE for the parameters of CSI, the congestion state, and the historic loss ratio. The network device may configure the thresholds for the parameters with semi-static signaling, for example, radio resource control (RRC) signaling. In these aspects, the UE evaluates current conditions, such as the current CSI, the congestion state, and the loss ratio in a specific time window T with respect to the configured thresholds. The time window T may be configured by the network device via RRC signaling, a media access control-control element (MAC-CE) , or downlink control information (DCI) . If the current conditions (e.g., current parameters) exceed the configured thresholds, the UE will adjust the percentage P, indicating what percentage of packets should carry information of a prior packet.
[0073] FIGURE 5 is a timeline illustrating packets carrying information of previous packets, in accordance with various aspects of the present disclosure. In the example of FIGURE 5, a UE transmits packets carrying additional information of prior packets. A second packet 502 carries additional information of a first packet 501. A sixth packet 506 carries additional information of a fifth packet 505, etc. In this example, the packets carrying additional information are transmitted every four frames prior to converting the percentage P. After converting the percentage P to a higher number, the packets carrying additional information are transmitted every two frames. For example, a second packet 512 carries additional information of a first packet 511. A fourth packet 514 carries additional information of a third packet 513, etc. In the example of FIGURE 5, the packets carrying information of a previous packet are cross-hatched. The conversion may occur, for example, because the congestion was reduced to below a threshold, or the CSI was reduced to below a threshold. Similarly, the historic loss ratio may have increased above a threshold.
[0074] According to further aspects of the present disclosure, for downlink (DL) communications, the network device determines the percentage P of packets carrying information of prior packets and the network device indicates, to the UE, specific packets that will carry information about prior packets. If the network entity dynamically schedules the UE, then the indication may be included in the DCI that dynamically schedules the UE. If the network entity configures the UE for semi persistent scheduling (SPS) , the indication may be carried by a MAC-CE or a specific bit in a physical downlink shared channel (PDSCH) . In other implementations, the network entity statically indicates the specific packets that carry information about the previous packets. For example, the network entity may transmit RRC signaling that configures a rule defining which packets will carry the additional information about previous packets.
[0075] According to still further aspects of the present disclosure, the percentage P of packets that carry information about the previous packets depends on the type or importance of the previous packet. There are three types of frame compression used in video compression, including an intra-coded picture frame (I-frame) , a predicted picture frame (P-frame) , and a bi-directional predicted picture frame (B-frame) . For example, with compressed video frames, an I-frame is more important than a P-frame and a B-frame, because the I-frame can be decoded without additional information, whereas the P-frame and B-frame are decoded based on the data from an I-frame. Thus, an I-frame is expected to be transmitted and decoded successfully with a higher reliability. According to these aspects, if the previous packet belongs to an I-frame, then the percentage P is set to be high. If the previous packet does not belong to an I-frame, then the percentage P is set to be low. The transmitter thus decides which packets should duplicate the information.
[0076] FIGURE 6 is a timeline illustrating packets carrying information of previous packets based on packet type, in accordance with various aspects of the present disclosure. In the example of FIGURE 6, first, third, and fifth packets 601, 603, 605 are I-frame packets. Thus, second, fourth, and sixth packets 602, 604, 606 carry information about their prior packets 601, 603, 605, respectively. That is, the second packet 602 carries information about the first packet 601, the fourth packet 604 carries information about the third packet 603, and the sixth packet 606 carries information about the fifth packet 605.
[0077] The seventh, eighth, ninth, eleventh, twelfth, thirteenth, and fourteenth packets 607, 608, 609, 611, 612, 613, 614 are not packets of an I-frame. Thus, only the tenth and fifteenth packets 610, 615 carry information about the prior packets 609, 614, respectively. It is noted that the gap size between the sixth and tenth packets 606, 610 differs from the gap size between the tenth and fifteenth packets 610, 615. The gap size may vary dynamically, as in the example of FIGURE 6, or the gap size may remain fixed (not shown) .
[0078] According to further aspects of the present disclosure, the carried information about the prior packet may be adaptively adjusted between high resolution and low resolution. High resolution introduces additional loading on the network and requires more resources. Low resolution introduces less loading on the network with fewer required resources in comparison to high resolution. In these aspects, if the UE is experiencing congestion and / or the available resources are not sufficient, then the low resolution information is carried by the next packet. If the UE is not experiencing congestion and the available resources are sufficient, then the high resolution information is carried by the next packet.
[0079] Traffic may be encoded with different content layers having different resolutions. FIGURE 7 is a block diagram illustrating traffic (e.g., a frame) encoded with different content layers having different resolutions, in accordance with various aspects of the present disclosure. In the example of FIGURE 7, the traffic (e.g., frame) includes three content layers: a base layer, an enhanced layer 1, and an enhanced layer 2. Each content layer carries the same information but with a different resolution. In this example, the higher the layer index (or position) , then the higher the resolution will be. For example, the enhanced layer 2 may have a high resolution of 1000 pixels, and the enhanced layer 1 may have a medium resolution of 500 pixels. The base layer may have a low resolution of 250 pixels.
[0080] As indicated above, FIGURES 4-7 are provided as examples. Other examples may differ from what is described with respect to FIGURES 4-7.
[0081] FIGURE 8 is a flow diagram illustrating an example process 800 performed, for example, by a user equipment (UE) , in accordance with various aspects of the present disclosure. The example process 800 is an example of a dynamic retransmission scheme for tight latency services for power optimized wearable devices, such as extended reality (XR) glasses. The operations of the process 800 may be implemented by a UE 120.
[0082] At block 802, the user equipment (UE) generates a number of packets, a dynamically configured percentage of the number of packets carrying information about prior packets. For example, the UE (e.g., using the controller / processor 280, memory 282, and / or the like) may generate the packets. In some aspects, the percentage is dynamically set in accordance with parameters comprising a channel state, a congestion state, available resources, and a historic loss ratio. In other aspects, an indication of the percentage is received from a network entity. In still other aspects, the percentage is set based on a type of a prior packet.
[0083] At block 804, the user equipment (UE) transmits the number of packets across a wireless interface. For example, the UE (e.g., using the antenna 252, DEMOD / MOD 254, TX MIMO processor 266, transmit processor 264, controller / processor 280, memory 282, and / or the like) may transmit the packets. In some aspects, a resolution of the information about prior packets is adaptively set.
[0084] FIGURE 9 is a flow diagram illustrating an example process 900 performed, for example, by a network device, in accordance with various aspects of the present disclosure. The example process 900 is an example of a dynamic retransmission scheme for tight latency services for power optimized wearable devices, such as extended reality (XR) glasses. The operations of the process 900 may be implemented by a base station 110.
[0085] At block 902, the base station transmits parameter thresholds for dynamically configuring a percentage of a number of packets that will carry information about prior packets. For example, the base station (e.g., using the antenna 234, MOD / DEMOD 232, TX MIMO processor 230, transmit processor 220, controller / processor 240, memory 242, and / or the like) may transmit the parameter thresholds. In some aspects, the parameter thresholds are transmitted via radio resource control (RRC) signaling.
[0086] At block 904, the base station receiving the number of packets across a wireless interface. For example, the base station (e.g., using the antenna 234, MOD / DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, memory 242, and / or the like) may receive the packets. Example Aspects
[0087] Aspect 1: A method of wireless communication, comprising: generating a plurality of packets, a dynamically configured percentage of the plurality of packets carrying information about prior packets; and transmitting the plurality of packets across a wireless interface.
[0088] Aspect 2: The method of Aspect 1, in which the percentage is dynamically set in accordance with parameters comprising a channel state, a congestion state, available resources, and a historic loss ratio.
[0089] Aspect 3: The method of Aspect 1 or 2, further comprising: receiving thresholds for the parameters; and adjusting the percentage in response to at least one of the thresholds being exceeded during a configured time window.
[0090] Aspect 4: The method of any of the preceding Aspects, in which receiving the thresholds occurs via radio resource control (RRC) signaling.
[0091] Aspect 5: The method of any of the preceding Aspects, in which the configured time window is indicated via one of radio resource control (RRC) signaling, downlink control information (DCI) , or a media access control-control element (MAC-CE) .
[0092] Aspect 6: The method of Aspect 1, further comprising receiving an indication of the percentage from a network entity.
[0093] Aspect 7: The method of any of Aspects 1 or 6, in which the indication is received via one of scheduling downlink control information (DCI) , a media access control-control element (MAC-CE) , or a specific bit in a physical downlink shared channel (PDSCH) .
[0094] Aspect 8: The method of Aspect 1, further comprising setting the percentage based on a type of a prior packet.
[0095] Aspect 9: The method of any of the preceding Aspects, further comprising adaptively setting a resolution of the information about prior packets.
[0096] Aspect 10: The method of any of the preceding Aspects, in which: different content layers have different resolutions for the information about prior packets; and each resolution has a different amount of data.
[0097] Aspect 11: A method of wireless communication by a network device, comprising: transmitting parameter thresholds for dynamically configuring a percentage of a plurality of packets that will carry information about prior packets; and receiving the plurality of packets across a wireless interface.
[0098] Aspect 12: The method of Aspect 11, in which the parameter thresholds are transmitted via radio resource control (RRC) signaling.
[0099] Aspect 13: The method of Aspect 11 or 12, further comprising configuring a time window during which the thresholds will be compared to current user equipment (UE) conditions, the configuring occurring via one of radio resource control (RRC) signaling, downlink control information (DCI) , or a media access control-control element (MAC-CE) .
[0100] Aspect 14: The method of any of the Aspects 11-13, further comprising transmitting an indication of the percentage to a user equipment (UE) .
[0101] Aspect 15: The method of any of the Aspects 11-14, in which the indication is transmitted via one of scheduling downlink control information (DCI) , a media access control-control element (MAC-CE) , or a specific bit in a physical downlink shared channel (PDSCH) .
[0102] Aspect 16: An apparatus for wireless communication, comprising: at least one memory; and at least one processor coupled to the at least one memory, the at least one processor configured: to generate a plurality of packets, a dynamically configured percentage of the plurality of packets carrying information about prior packets; and to transmit the plurality of packets across a wireless interface.
[0103] Aspect 17: The apparatus of Aspect 16, in which the percentage is dynamically set in accordance with parameters comprising a channel state, a congestion state, available resources, and a historic loss ratio.
[0104] Aspect 18: The apparatus of Aspect 16 or 17, in which the at least one processor is further configured: to receive thresholds for the parameters; and to adjust the percentage in response to at least one of the thresholds being exceeded during a configured time window.
[0105] Aspect 19: The apparatus of any of the Aspects 16-18, in which the at least one processor is further configured to receive the thresholds via radio resource control (RRC) signaling.
[0106] Aspect 20: The apparatus of any of the Aspects 16-19, in which the configured time window is indicated via one of radio resource control (RRC) signaling, downlink control information (DCI) , or a media access control-control element (MAC-CE) .
[0107] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise form disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the aspects.
[0108] As used, the term “component” is intended to be broadly construed as hardware, firmware, and / or a combination of hardware and software. As used, a processor is implemented in hardware, firmware, and / or a combination of hardware and software.
[0109] Some aspects are described in connection with thresholds. As used, satisfying a threshold may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, and / or the like.
[0110] It will be apparent that systems and / or methods described may be implemented in different forms of hardware, firmware, and / or a combination of hardware and software. The actual specialized control hardware or software code used to implement these systems and / or methods is not limiting of the aspects. Thus, the operation and behavior of the systems and / or methods were described without reference to specific software code-it being understood that software and hardware can be designed to implement the systems and / or methods based, at least in part, on the description.
[0111] Even though particular combinations of features are recited 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 may be combined in ways not specifically recited in the claims and / or disclosed in the specification. Although each dependent claim listed below may directly depend on only one claim, the disclosure of various aspects includes each dependent claim in combination with every other claim in the claim set. 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) .
[0112] No element, act, or instruction used should be construed as critical or essential unless explicitly described as such. Also, as used, the articles “a” and “an” are intended to include one or more items, and may be used interchangeably with “one or more. ” Furthermore, as used, the terms “set” and “group” are intended to include one or more items (e.g., related items, unrelated items, a combination of related and unrelated items, and / or the like) , and may be used interchangeably with “one or more. ” Where only one item is intended, the phrase “only one” or similar language is used. Also, as used, the terms “has, ” “have, ” “having, ” and / or the like are intended to be open-ended terms. Further, the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise.
Claims
1.A method of wireless communication, comprising:generating a plurality of packets, a dynamically configured percentage of the plurality of packets carrying information about prior packets; andtransmitting the plurality of packets across a wireless interface.2.The method of claim 1, in which the percentage is dynamically set in accordance with parameters comprising a channel state, a congestion state, available resources, and a historic loss ratio.3.The method of claim 2, further comprising:receiving thresholds for the parameters; andadjusting the percentage in response to at least one of the thresholds being exceeded during a configured time window.4.The method of claim 3, in which receiving the thresholds occurs via radio resource control (RRC) signaling.5.The method of claim 3, in which the configured time window is indicated via one of radio resource control (RRC) signaling, downlink control information (DCI) , or a media access control-control element (MAC-CE) .6.The method of claim 1, further comprising receiving an indication of the percentage from a network entity.7.The method of claim 6, in which the indication is received via one of scheduling downlink control information (DCI) , a media access control-control element (MAC-CE) , or a specific bit in a physical downlink shared channel (PDSCH) .8.The method of claim 1, further comprising setting the percentage based on a type of a prior packet.9.The method of claim 1, further comprising adaptively setting a resolution of the information about prior packets.10.The method of claim 9, in which:different content layers have different resolutions for the information about prior packets; andeach resolution has a different amount of data.11.A method of wireless communication by a network device, comprising:transmitting parameter thresholds for dynamically configuring a percentage of a plurality of packets that will carry information about prior packets; andreceiving the plurality of packets across a wireless interface.12.The method of claim 11, in which the parameter thresholds are transmitted via radio resource control (RRC) signaling.13.The method of claim 11, further comprising configuring a time window during which the parameter thresholds will be compared to current user equipment (UE) conditions, the configuring occurring via one of radio resource control (RRC) signaling, downlink control information (DCI) , or a media access control-control element (MAC-CE) .14.The method of claim 11, further comprising transmitting an indication of the percentage to a user equipment (UE) .15.The method of claim 14, in which the indication is transmitted via one of scheduling downlink control information (DCI) , a media access control-control element (MAC-CE) , or a specific bit in a physical downlink shared channel (PDSCH) .16.An apparatus for wireless communication, comprising:at least one memory; andat least one processor coupled to the at least one memory, the at least one processor configured:to generate a plurality of packets, a dynamically configured percentage of the plurality of packets carrying information about prior packets; andto transmit the plurality of packets across a wireless interface.17.The apparatus of claim 16, in which the percentage is dynamically set in accordance with parameters comprising a channel state, a congestion state, available resources, and a historic loss ratio.18.The apparatus of claim 17, in which the at least one processor is further configured:to receive thresholds for the parameters; andto adjust the percentage in response to at least one of the thresholds being exceeded during a configured time window.19.The apparatus of claim 18, in which the at least one processor is further configured to receive the thresholds via radio resource control (RRC) signaling.20.The apparatus of claim 18, in which the configured time window is indicated via one of radio resource control (RRC) signaling, downlink control information (DCI) , or a media access control-control element (MAC-CE) .