WO2021142773A1 - Schéma efficace pour codes fontaines sur de multiples technologies d'accès radio - Google Patents

Schéma efficace pour codes fontaines sur de multiples technologies d'accès radio Download PDF

Info

Publication number
WO2021142773A1
WO2021142773A1 PCT/CN2020/072752 CN2020072752W WO2021142773A1 WO 2021142773 A1 WO2021142773 A1 WO 2021142773A1 CN 2020072752 W CN2020072752 W CN 2020072752W WO 2021142773 A1 WO2021142773 A1 WO 2021142773A1
Authority
WO
WIPO (PCT)
Prior art keywords
packets
sdus
receiver
adus
transmitter
Prior art date
Application number
PCT/CN2020/072752
Other languages
English (en)
Inventor
Changlong Xu
Hao Xu
Tao Luo
Original Assignee
Qualcomm Incorporated
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to PCT/CN2020/072752 priority Critical patent/WO2021142773A1/fr
Priority to PCT/CN2020/080534 priority patent/WO2021142923A1/fr
Publication of WO2021142773A1 publication Critical patent/WO2021142773A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0041—Arrangements at the transmitter end
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/37—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35
    • H03M13/3761—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35 using code combining, i.e. using combining of codeword portions which may have been transmitted separately, e.g. Digital Fountain codes, Raptor codes or Luby Transform [LT] codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/22—Parsing or analysis of headers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0057—Block codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1822—Automatic repetition systems, e.g. Van Duuren systems involving configuration of automatic repeat request [ARQ] with parallel processes

Definitions

  • aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for efficiently transmitting data over multiple radio access technologies (RATs) .
  • RATs radio access technologies
  • 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. ) .
  • available system resources e.g., bandwidth, transmit power, etc.
  • multiple-access systems examples 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.
  • 3GPP 3rd Generation Partnership Project
  • LTE Long Term Evolution
  • LTE-A LTE Advanced
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single-carrier frequency division multiple access
  • TD-SCDMA time division synchronous code division multiple access
  • a wireless multiple-access communication system may include a number of base stations (BSs) , which are each capable of simultaneously supporting communication for multiple communication devices, otherwise known as user equipments (UEs) .
  • BSs base stations
  • UEs user equipments
  • a set of one or more base stations may define an eNodeB (eNB) .
  • eNB eNodeB
  • a wireless multiple access communication system may include a number of distributed units (DUs) (e.g., edge units (EUs) , edge nodes (ENs) , radio heads (RHs) , smart radio heads (SRHs) , transmission reception points (TRPs) , etc.
  • DUs distributed units
  • EUs edge units
  • ENs edge nodes
  • RHs radio heads
  • SSRHs smart radio heads
  • TRPs transmission reception points
  • CUs central units
  • CNs central nodes
  • ANCs access node controllers
  • a set of one or more DUs, in communication with a CU may define an access node (e.g., which may be referred to as a BS, 5G NB, next generation NodeB (gNB or gNodeB) , transmission reception point (TRP) , etc. ) .
  • BS central nodes
  • 5G NB next generation NodeB
  • TRP transmission reception point
  • a BS or DU may communicate with a set of UEs on downlink channels (e.g., for transmissions from a BS or DU to a UE) and uplink channels (e.g., for transmissions from a UE to BS or DU) .
  • downlink channels e.g., for transmissions from a BS or DU to a UE
  • uplink channels e.g., for transmissions from a UE to BS or DU
  • NR e.g., new radio or 5G
  • LTE long term evolution
  • 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) .
  • OFDMA orthogonal frequency division multiple access
  • CP cyclic prefix
  • DL downlink
  • UL uplink
  • NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.
  • MIMO multiple-input multiple-output
  • Certain aspects provide a method for wireless communication by a transmitter.
  • the method generally includes dividing one or more application data units (ADUs) into a first number of source data units (SDUs) , generating a second number of packets based on the first number of SDUs using a Fountain coding scheme wherein the second number is greater than the first number, allocating the second number of packets across multiple radio access technologies (RATs) , and transmitting the second number of packets, to a receiver, via the multiple RATs according to the allocation.
  • ADUs application data units
  • SDUs source data units
  • RATs radio access technologies
  • Certain aspects provide a method for wireless communication by a receiver.
  • the method generally includes receiving, via multiple radio access technologies (RATs) , a first number of packets from a transmitter, recovering a second number of source data units (SDUs) by decoding the first number of received packets using a Fountain decoding scheme, and obtaining one or more application data units (ADUs) from the recovered second number of SDUs.
  • RATs radio access technologies
  • SDUs source data units
  • ADUs application data units
  • Certain aspects provide means for, apparatus, and/or computer readable medium having computer executable code stored thereon, for performing the techniques described herein.
  • 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.
  • FIG. 1 is a block diagram conceptually illustrating an example telecommunications system, in accordance with certain aspects of the present disclosure.
  • FIG. 2 is a block diagram conceptually illustrating a design of an example base station (BS) and user equipment (UE) , in accordance with certain aspects of the present disclosure.
  • BS base station
  • UE user equipment
  • FIG. 3 illustrates a fountain encoding example
  • FIG. 4 illustrates a type of fountain encoding
  • FIG. 5 illustrates example operations that may be performed by a transmitter, in accordance with certain aspects of the present disclosure.
  • FIG. 6 illustrates example operations that may be performed by a transmitter, in accordance with certain aspects of the present disclosure.
  • FIG. 7 is a diagram illustrating an example algorithm, in accordance with certain aspects of the present disclosure.
  • FIGs. 8A &8B illustrates example protocol data unit (PDU) formats, in accordance with certain aspects of the present disclosure.
  • the APPENDIX includes details of certain aspects of the present disclosure.
  • aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for efficiently transmitting data over multiple radio access technologies (RATs) between a transmitter and a receiver, for example, between a base station and a user equipment (UE) .
  • RATs radio access technologies
  • 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.
  • E-UTRA Evolved UTRA
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi
  • IEEE 802.16 WiMAX
  • IEEE 802.20 Flash-OFDMA
  • UTRA and E-UTRA are part of Universal Mobile Telecommunication System (UMTS) .
  • New Radio is an emerging wireless communications technology under development in conjunction with the 5G Technology Forum (5GTF) .
  • 3GPP Long Term Evolution (LTE) and LTE-Advanced (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) .
  • the techniques described herein may be used for the wireless networks and radio technologies mentioned above as well as other wireless networks and radio technologies. For clarity, while aspects may be described herein using terminology commonly associated with 3G and/or 4G wireless technologies, aspects of the present disclosure can be applied in other generation-based communication systems, such as 5G and later, including NR technologies.
  • New radio (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) .
  • eMBB enhanced mobile broadband
  • mmW millimeter wave
  • mMTC massive machine type communications MTC
  • URLLC ultra-reliable low-latency communications
  • 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.
  • TTI transmission time intervals
  • QoS quality of service
  • these services may co-exist in the same subframe.
  • FIG. 1 illustrates an example wireless communication network 100 in which aspects of the present disclosure may be performed.
  • UEs 120 and/or BS 110 of FIG. 1 may be configured to perform operations described below with reference to FIGs. 5 and 6 to efficiently transmit data over multiple radio access technologies (RATs) .
  • RATs radio access technologies
  • the wireless communication network 100 may include a number of base stations (BSs) 110 and other network entities.
  • a BS may be a station that communicates with user equipments (UEs) .
  • Each BS 110 may provide communication coverage for a particular geographic area.
  • 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.
  • NB Node B
  • gNodeB next generation NodeB
  • NR BS next generation NodeB
  • 5G NB access point
  • AP access point
  • TRP transmission reception point
  • a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile BS.
  • the base stations may be interconnected to one another and/or to one or more other base stations or network nodes (not shown) in wireless communication network 100 through various types of backhaul interfaces, such as a direct physical connection, a wireless connection, a virtual network, or the like using any suitable transport network.
  • 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.
  • NR or 5G RAT networks may be deployed.
  • 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. ) .
  • CSG Closed Subscriber Group
  • 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.
  • the BSs 110a, 110b and 110c may be macro BSs for the macro cells 102a, 102b and 102c, respectively.
  • the BS 110x may be a pico BS for a pico cell 102x.
  • the BSs 110y and 110z may be femto BSs for the femto cells 102y and 102z, respectively.
  • a BS may support one or multiple (e.g., three) cells.
  • Wireless communication network 100 may also include relay stations.
  • a relay station is a station that receives a transmission of data and/or other information from an upstream station (e.g., a BS or a UE) and sends a transmission of the data and/or other information to a downstream station (e.g., a UE or a BS) .
  • a relay station may also be a UE that relays transmissions for other UEs.
  • a relay station 110r may communicate with the BS 110a and a UE 120r in order to facilitate communication between the BS 110a and the UE 120r.
  • a relay station may also be referred to as a relay BS, a relay, etc.
  • Wireless communication network 100 may be a heterogeneous network that includes BSs of different types, e.g., macro BS, pico BS, femto BS, relays, etc. These different types of BSs may have different transmit power levels, different coverage areas, and different impact on interference in the wireless communication network 100.
  • macro BS may have a high transmit power level (e.g., 20 Watts) whereas pico BS, femto BS, and relays may have a lower transmit power level (e.g., 1 Watt) .
  • Wireless communication network 100 may support synchronous or asynchronous operation.
  • the BSs may have similar frame timing, and transmissions from different BSs may be approximately aligned in time.
  • the BSs may have different frame timing, and transmissions from different BSs may not be aligned in time.
  • the techniques described herein may be used for both synchronous and asynchronous operation.
  • a network controller 130 may couple to a set of BSs and provide coordination and control for these BSs.
  • the network controller 130 may communicate with the BSs 110 via a backhaul.
  • the BSs 110 may also communicate with one another (e.g., directly or indirectly) via wireless or wireline backhaul.
  • the UEs 120 may be dispersed throughout the wireless communication network 100, and each UE may be stationary or mobile.
  • a UE may also be referred to as a mobile station, 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.
  • CPE Customer Premises Equipment
  • PDA personal digital assistant
  • WLL wireless local loop
  • MTC machine-type communication
  • eMTC evolved MTC
  • 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.
  • a network e.g., a wide area network such as Internet or a cellular network
  • Some UEs may be considered Internet-of-Things (IoT) devices, which may be narrowband IoT (NB-IoT) devices.
  • IoT Internet-of-Things
  • NB-IoT narrowband IoT
  • Certain wireless networks utilize orthogonal frequency division multiplexing (OFDM) on the downlink and single-carrier frequency division multiplexing (SC-FDM) on the uplink.
  • OFDM and SC-FDM partition the system bandwidth into multiple (K) orthogonal subcarriers, which are also commonly referred to as tones, bins, etc.
  • K orthogonal subcarriers
  • Each subcarrier may be modulated with data.
  • modulation symbols are 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 (K) may be dependent on the system bandwidth.
  • the spacing of the subcarriers may be 15 kHz and the minimum resource allocation (called a “resource block” (RB) ) may be 12 subcarriers (or 180 kHz) . Consequently, the nominal Fast Fourier Transfer (FFT) size may be equal to 128, 256, 512, 1024 or 2048 for system bandwidth of 1.25, 2.5, 5, 10, or 20 megahertz (MHz) , respectively.
  • the system bandwidth may also be partitioned into subbands. For example, a subband may cover 1.08 MHz (i.e., 6 resource blocks) , and there may be 1, 2, 4, 8, or 16 subbands for system bandwidth of 1.25, 2.5, 5, 10 or 20 MHz, respectively.
  • NR may utilize OFDM with a CP on the uplink and downlink and include support for half-duplex operation using TDD. Beamforming may be supported 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.
  • 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.
  • 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.
  • a UE may function as a scheduling entity in a peer-to-peer (P2P) network, and/or in a mesh network.
  • P2P peer-to-peer
  • UEs may communicate directly with one another in addition to communicating with a scheduling entity.
  • a solid line with double arrows indicates desired transmissions between a UE and a serving BS, which is a BS designated to serve the UE on the downlink and/or uplink.
  • a finely dashed line with double arrows indicates interfering transmissions between a UE and a BS.
  • FIG. 2 shows a block diagram illustrating an example base station (BS) and an example user equipment (UE) in accordance with some aspects of the present disclosure.
  • 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.
  • the processor 220 may process (for example, 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 cell-specific reference signal (CRS) .
  • a transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (for example, precoding) on the data symbols, the control symbols, or the reference symbols, if applicable, and may provide output symbol streams to the modulators (MODs) 232a-232t.
  • Each modulator 232 may process a respective output symbol stream (for example, for OFDM, etc. ) to obtain an output sample stream.
  • Each modulator may further process (for example, convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal.
  • Downlink signals from modulators 232a-232t may be transmitted via the antennas 234a-234t, respectively.
  • the antennas 252a-252r may receive the downlink signals from the BS 110 and may provide received signals to the demodulators (DEMODs) in transceivers 254a-254r, respectively.
  • Each demodulator 254 may condition (for example, filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples.
  • Each demodulator may further process the input samples (for example, for OFDM, etc. ) to obtain received symbols.
  • a MIMO detector 256 may obtain received symbols from all the demodulators 254a-254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • a receive processor 258 may process (for example, demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 120 to a data sink 260, and provide decoded control information to a controller/processor 280.
  • a transmit processor 264 may receive and process data (for example, for the physical uplink shared channel (PUSCH) ) from a data source 262 and control information (for example, 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 (for example, 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 demodulators in transceivers 254a-254r (for example, for SC-FDM, etc. ) , and transmitted to the BS 110.
  • the uplink signals from the UE 120 may be received by the antennas 234, processed by the modulators 232, 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 the controller/processor 240.
  • the memories 242 and 282 may store data and program codes for BS 110 and UE 120, respectively.
  • a scheduler 244 may schedule UEs for data transmission on the downlink or uplink.
  • the controller/processor 280 (and/or other processors and modules) at the UE 120 and/or the controller/processor 240 (and/or other processors and modules) of the BS 110 may direct perform or direct the execution of processes for the techniques described herein (e.g., with reference to FIGs. 5 and 6) .
  • Certain aspects of the present disclosure provide techniques for efficiently transmitting data over multiple radio access technologies (RATs) , for example, between a base station and a user equipment (UE) .
  • RATs radio access technologies
  • UE user equipment
  • the techniques may be used to transfer relatively large amounts of data (e.g., large file transfers or streaming media) . There are various potential issues when attempting to transfer such large amounts of data.
  • Low throughput can also occur due to ARQ in the transmission control protocol (TCP) layer in the core network. This can occur while waiting for an ACK in the transmitter. As noted above, retransmission of packets doubles the resource, at least, and even worse when channel conditions deteriorate.
  • TCP transmission control protocol
  • Low latency can occur, for example, due to re-ordering of packets in the RLC layer in RAN or due to re-ordering of packets in the TCP layer in in the core network. This latency can be relatively high, for example, if the packets at the beginning are received later.
  • aspects of the present disclosure provide algorithms utilizing fountain codes for transmissions over multiple RATs that may help address some of the issue described above.
  • Fountain codes also known as rateless erasure codes
  • Rateless erasure codes generally refer to a class of codes with the property that the encoder can generate any number of symbols on-the-fly from the source symbols of a source block of data.
  • the term “Fountain” or “rateless” refers to the fact that these codes do not exhibit a fixed code rate.
  • Luby transform (LT) and Raptor codes are types of Fountain codes. Raptor codes have very efficient linear time encoding and decoding algorithms, and require only a small constant number of XOR operations per generated symbol for both encoding and decoding.
  • fountain codes generate new packets on the fly for transmission.
  • several of these symbols combined together may reconstruct the original data (even if some of the symbols are lost/not received successfully) .
  • FIG. 3 graphically illustrates an example of encoding packets using fountain codes.
  • an original generator matrix G kj may be used to generate a set of K transmitted packets (p j ) from a sequence of source data (s k ) :
  • N packets may be recovered (received) as:
  • G nk is invertible with minimum N.
  • an example raptor code may be constructed using an outer code (e.g., a low density parity check-LDPC code) plus a Luby transform (LT) code.
  • an outer code e.g., a low density parity check-LDPC code
  • LT Luby transform
  • the average degree is 3 (which may be considered relatively low complexity) , meaning three received packets may be used to recover an original source packet.
  • the LT code fails to connect with 3 grey packets, but the LT code recovers the other 17 pre-coded packets.
  • the outer code is used to deduce the original packets (an irregular LDPC may be a good option for the outer code) .
  • aspects of the present disclosure provide algorithms that may utilizing fountain codes in such a manner for transmissions over multiple RATs that may help address some of the issue described above.
  • FIG. 5 illustrates example operations 500 that may be performed by a transmitter, in accordance with certain aspects of the present disclosure.
  • operations 500 may be performed by one of the UEs or base stations of FIG. 1 or FIG. 2 to efficiently transmit data to a receiver.
  • Operations 500 begin, at 502, by dividing one or more application data units (ADUs) into a first number of source data units (SDUs) .
  • the transmitter generates a second number of packets based on the first number of SDUs using a Fountain coding scheme wherein the second number is greater than the first number.
  • the transmitter allocating the second number of packets across multiple radio access technologies (RATs) .
  • the transmitter transmits the second number of packets, to a receiver, via the multiple RATs according to the allocation.
  • RATs radio access technologies
  • FIG. 6 illustrates example operations 600 that may be performed by a receiver, in accordance with certain aspects of the present disclosure, and may be considered complementary to operations 500 of FIG. 5.
  • operations 600 may be performed by one of the UEs or base stations of FIG. 1 or FIG. 2 to process data transmissions from a transmitter performing operations 500 of FIG. 5.
  • Operations 600 begin, at 602, by receiving, via multiple radio access technologies (RATs) , a first number of packets from a transmitter.
  • RATs radio access technologies
  • the receiver recovering a second number of source data units (SDUs) by decoding the first number of received packets using a Fountain decoding scheme.
  • the receiver obtaining one or more application data units (ADUs) from the recovered second number of SDUs.
  • ADUs application data units
  • FIG. 7 graphically illustrates an encoding algorithm in line with operations 500 described above.
  • one or more application data units may be concatenated (although this step may not be necessary when PDCP PDU size is large) .
  • the ADU may be divided into K source data units (SDUs) , for example, equally or close to equally.
  • SDUs source data units
  • the size of SDUs may be predefined and, in some cases, the value of K may be optimized using the SDU size and generator matrix.
  • N packets which may be mapped to N PDUs.
  • the value of N may be determined, for example, by channel conditions.
  • the transmitter may then allocate N PDUs to multiple RATs.
  • RATs RAT0-RAT3
  • M1, M2, M3, and M4 PDUs allocated to RAT0, RAT1, RAT2, and RAT 3, respectively.
  • the actual values of M1, M2, M3, and M4 may be determined by channel condition of each RAT, for example, such that more packets are allocated to a RAT with better channel conditions. Packets may be allocated into the four branches in sequence. The number of packets allocated can be dynamically adjusted, for example, according to channel condition of each RAT.
  • Parameters of K and size of the SDUs may be predefined and known by both transmitter and receiver (to enable decoding) .
  • the mother generator matrix itself may be defined and used for/by both the UE and BS.
  • the mother generator matrix may be constructed on the flow (e.g., based on parameters configured by radio resource control –RRC signaling) .
  • the header of generated PDUs may be designed to facilitate ordering at the receiver.
  • FIG. 8A shows one option in which a new header includes an ADU SN (the sequence number-SN of the ADU) and a PDU SN (the sequence number of PDU which is encoded block for fountain codes) .
  • the header of a generated PDU may include a joint encoding of a header including ADU SN and PDU SN, which may help reduce overhead.
  • the total size of the receive PDUs may be slightly larger than that of original PDUs.
  • the number of transmit PDUs may also be slightly larger than requirement for decoding.
  • the better RAT the better channel conditions are for one RAT, the more data is allocated for transmission on that RAT.
  • Another potential advantage to the algorithm proposed herein is low latency. There may be no requirement on the ordering of the received subblocks. All the receive subblocks can be used for decoding. Further, the decoding complexity may be relatively low, for example, because of small average row degrees.
  • 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.
  • the order and/or use of specific steps and/or actions may be modified without departing from the scope of the claims.
  • a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members.
  • “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) .
  • 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.
  • 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.
  • ASIC application specific integrated circuit
  • FIGs. 5 and 6 may be performed by various processors shown in FIG. 2 of the BS 110 and/or UE 120.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • PLD programmable logic device
  • 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.
  • 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.
  • a user interface e.g., keypad, display, mouse, joystick, etc.
  • a user interface e.g., keypad, display, mouse, joystick, etc.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • RAM Random Access Memory
  • ROM Read Only Memory
  • PROM Programmable Read-Only Memory
  • EPROM Erasable Programmable Read-Only Memory
  • EEPROM Electrical 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.
  • 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.
  • a software module may be loaded into RAM from a hard drive when a triggering event occurs.
  • 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.
  • any connection is properly termed a computer-readable medium.
  • 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
  • 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 include compact disc (CD) , laser disc, optical disc, digital versatile disc (DVD) , floppy disk, and disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers.
  • computer-readable media may comprise non-transitory computer-readable media (e.g., tangible media) .
  • 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.
  • certain aspects may comprise a computer program product for performing the operations presented herein.
  • 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.
  • 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.
  • a user terminal and/or base station can be coupled to a server to facilitate the transfer of means for performing the methods described herein.
  • 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.
  • storage means e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or floppy disk, etc.
  • CD compact disc
  • floppy disk etc.
  • any other suitable technique for providing the methods and techniques described herein to a device can be utilized.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Theoretical Computer Science (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Certains aspects de la présente invention concernent des techniques permettant de transmettre efficacement des données sur de multiples technologies d'accès radio (RAT), par exemple, entre une station de base et un équipement utilisateur (UE).
PCT/CN2020/072752 2020-01-17 2020-01-17 Schéma efficace pour codes fontaines sur de multiples technologies d'accès radio WO2021142773A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2020/072752 WO2021142773A1 (fr) 2020-01-17 2020-01-17 Schéma efficace pour codes fontaines sur de multiples technologies d'accès radio
PCT/CN2020/080534 WO2021142923A1 (fr) 2020-01-17 2020-03-21 Schéma efficace pour codes fontaines sur de multiples technologies d'accès radio

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/072752 WO2021142773A1 (fr) 2020-01-17 2020-01-17 Schéma efficace pour codes fontaines sur de multiples technologies d'accès radio

Publications (1)

Publication Number Publication Date
WO2021142773A1 true WO2021142773A1 (fr) 2021-07-22

Family

ID=76863290

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/CN2020/072752 WO2021142773A1 (fr) 2020-01-17 2020-01-17 Schéma efficace pour codes fontaines sur de multiples technologies d'accès radio
PCT/CN2020/080534 WO2021142923A1 (fr) 2020-01-17 2020-03-21 Schéma efficace pour codes fontaines sur de multiples technologies d'accès radio

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/080534 WO2021142923A1 (fr) 2020-01-17 2020-03-21 Schéma efficace pour codes fontaines sur de multiples technologies d'accès radio

Country Status (1)

Country Link
WO (2) WO2021142773A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023141816A1 (fr) * 2022-01-26 2023-08-03 Lenovo (Beijing) Limited Unité centrale, unité distribuée, équipement utilisateur et procédé pour la transmission de données basée sur une unité de données d'application
WO2023194979A1 (fr) * 2022-04-08 2023-10-12 Telefonaktiebolaget Lm Ericsson (Publ) Signalisation cu-du et xn améliorée de perception xr de réalité étendue

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101562498A (zh) * 2008-04-18 2009-10-21 中国移动通信集团公司 多连接数据流裂化的编译码传输方法、设备及系统
CN103078707A (zh) * 2013-01-03 2013-05-01 北京理工大学 一种深空通信中的文件传输方法
CN103401649A (zh) * 2013-08-07 2013-11-20 清华大学 一种恶劣信道下基于喷泉编码的分布式传输装置和方法
WO2017193305A1 (fr) * 2016-05-11 2017-11-16 华为技术有限公司 Procédé, dispositif et système de transmission de données

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2186219A4 (fr) * 2007-08-07 2015-01-14 Lg Electronics Inc Procédé de mesure d'une liaison radioélectrique dans un système de communication sans fil
US10873941B2 (en) * 2014-05-16 2020-12-22 Huawei Technologies Co., Ltd. System and method for joint transmission over licensed and unlicensed bands using fountain codes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101562498A (zh) * 2008-04-18 2009-10-21 中国移动通信集团公司 多连接数据流裂化的编译码传输方法、设备及系统
CN103078707A (zh) * 2013-01-03 2013-05-01 北京理工大学 一种深空通信中的文件传输方法
CN103401649A (zh) * 2013-08-07 2013-11-20 清华大学 一种恶劣信道下基于喷泉编码的分布式传输装置和方法
WO2017193305A1 (fr) * 2016-05-11 2017-11-16 华为技术有限公司 Procédé, dispositif et système de transmission de données

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023141816A1 (fr) * 2022-01-26 2023-08-03 Lenovo (Beijing) Limited Unité centrale, unité distribuée, équipement utilisateur et procédé pour la transmission de données basée sur une unité de données d'application
WO2023194979A1 (fr) * 2022-04-08 2023-10-12 Telefonaktiebolaget Lm Ericsson (Publ) Signalisation cu-du et xn améliorée de perception xr de réalité étendue

Also Published As

Publication number Publication date
WO2021142923A1 (fr) 2021-07-22

Similar Documents

Publication Publication Date Title
EP3776984B1 (fr) Dci compactes pour urllc
US11483816B2 (en) Selective physical downlink control channel repetition for retransmissions
US11323983B2 (en) Efficient usage of resources in an uplink split bearer configuration
US11533134B2 (en) Feedback communication on a sidelink
US11076414B2 (en) Half-duplex handling with system-wide feedback resources
WO2020034947A1 (fr) Mappage de couche pour des transmissions à multiples trp
WO2021142773A1 (fr) Schéma efficace pour codes fontaines sur de multiples technologies d'accès radio
WO2021195800A1 (fr) Segmentation de blocs de code pour informations de commande de liaison descendante
WO2019001581A1 (fr) Sélection entre des types de code pour coder des bits d'information
US11212032B2 (en) Partial/full overlapping of multiple PDSCHs for non-ideal backhaul and associated rate matching of DMRS ports
US11863319B2 (en) Multicast network coding
US11438103B2 (en) Receiver capability aware implementation of HARQ feedback
US11588587B2 (en) Network coding termination and procedures using feedback
WO2022006831A1 (fr) Amélioration intercouche au moyen d'une rétroaction de commande de liaison radio sur couche physique
WO2022252169A1 (fr) Attribution de groupe de blocs de code (cbg) dynamiques
WO2020224404A1 (fr) Conception de protection inégale (uep) pour modulation d'ordre élevé
WO2022046351A1 (fr) Entrelacement de bits pour communication de liaison latérale avec forme d'onde entrelacée

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20914318

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20914318

Country of ref document: EP

Kind code of ref document: A1