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WO2009009990A1 - Procédé pour émettre et recevoir des données, dispositif de côté réseau, dispositif de côté abonné et système - Google Patents

Procédé pour émettre et recevoir des données, dispositif de côté réseau, dispositif de côté abonné et système Download PDF

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Publication number
WO2009009990A1
WO2009009990A1 PCT/CN2008/071563 CN2008071563W WO2009009990A1 WO 2009009990 A1 WO2009009990 A1 WO 2009009990A1 CN 2008071563 W CN2008071563 W CN 2008071563W WO 2009009990 A1 WO2009009990 A1 WO 2009009990A1
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WO
WIPO (PCT)
Prior art keywords
data
service
unit
side device
data stream
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2008/071563
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English (en)
Chinese (zh)
Inventor
Fei Shao
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Shanghai Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Shanghai Huawei Technologies Co Ltd
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 Huawei Technologies Co Ltd, Shanghai Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2009009990A1 publication Critical patent/WO2009009990A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H04L1/12—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
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1887—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a data transmitting method, a data receiving method, a network side device, and a user side device.
  • the Universal Mobile Telecommunication System is one of the world's leading third-generation mobile communications (3G) systems.
  • the UMTS system consists of three parts, namely Core Network ("CN"), Universal Mobile Telecommunications System (UTRAN), and User Equipment (UE, User Equipment).
  • CN Core Network
  • UTRAN Universal Mobile Telecommunications System
  • UE User Equipment
  • the interface between the CN and the UTRAN is usually defined as an Iu interface
  • the interface between the UTRAN and the UE is defined as a Uu interface.
  • the earliest protocol version of UMTS is R99.
  • the bearers of uplink and downlink services are based on dedicated channels, and the data transmission rate that can be achieved is 384Kbps.
  • the UMTS standards development organization has successively introduced the protocol specifications of the three phases of R4, R5 and R6, and introduced High Speed Downlink Packet Access (referred to as High Speed Downlink Packet Access).
  • High Speed Downlink Packet Access referred to as High Speed Downlink Packet Access
  • "HSDPA” technology and High Speed Uplink Packet Access (HSUPA) technology can provide peak rates of up to 14.4Mbps and 5.76Mbps, respectively, while greatly improving spectrum efficiency.
  • the prior art proposes a data transmission method based on high-speed packet access, which introduces a medium access control-high speed (MAC-hs, medium access control-high speed) entity on the UTRAN network side and the user side of the UMTS system.
  • the MAC-hs entity on the network side transmits data through Hybrid Automatic Repeat Request (HARQ), and the MAC-hs entity on the user side performs single-bit signaling feedback ACK/NACK on the received data through the HARQ entity. If the data is received correctly, the ACK is fed back, otherwise the NACK is fed back, and the network layer performs data transmission based on the received signaling.
  • HARQ Hybrid Automatic Repeat Request
  • the new data is continuously sent, otherwise the retransmission is performed until the maximum number of retransmissions is reached. .
  • the HARQ transmission is terminated, and the lost data is recovered by the Radio Link Control (RLC), and the data in the cache can also be configured with a timer, and is not scheduled for a long time. The data is discarded.
  • RLC Radio Link Control
  • the inventors have found that at least the following problems exist in the prior art:
  • the foregoing prior art can provide a higher data rate, and the prior art does not separately transmit and transmit services of multiple modes on the network side.
  • the same rearrangement mode is used for the services of the multiple modes on the user side, so that when multiple modes of services coexist, the quality of service (QoS, Quality of Service) of different modes of services is on the network side and the user side. It is difficult to guarantee.
  • QoS Quality of Service
  • the embodiments of the present invention provide a data sending method, a data receiving method, a network side device, and a user testing device, so as to support high-speed transmission and meet the service quality requirements of different modes of services.
  • an aspect of an embodiment of the present invention provides a data sending method, including:
  • the scheduled data stream is segmented and/or concatenated, and the divided and/or concatenated data streams are transmitted according to the quality of service.
  • the network side device provides a network side device, where the network side device includes:
  • a queuing unit configured to schedule data streams of different logical channels
  • Another aspect of the present invention provides a data receiving method, the method comprising: rearranging received segmented and/or concatenated data streams according to quality of service;
  • the reorganized data streams are reassembled, and the reassembled data streams are sent to their respective logical channels.
  • an embodiment of the present invention provides a user side device, where the user side device includes:
  • a rearrangement unit configured to rearrange the received divided and/or concatenated data streams according to the quality of service
  • a reorganization unit configured to reorganize a data stream output by the rearrangement unit
  • An allocating unit configured to send the data stream processed by the reassembly unit to a respective logical channel.
  • Another aspect of the present invention provides a data transmission system, where the system includes: a network side device, configured to allocate data flows of different logical channels to a priority queue, and then compare data in the queue according to priority order. The flow is scheduled, the scheduled data stream is segmented and/or concatenated, and the divided and/or concatenated data streams are transmitted according to the quality of service;
  • a user equipment configured to receive the data stream that is divided and/or concatenated, and to reorder the data stream according to the quality of service, and reorganize the data stream obtained by rearranging to obtain data scheduled on the network side.
  • the stream is then sent to the respective logical channel.
  • the embodiment of the present invention needs to segment and/or cascade the scheduled data streams, and then transmit the divided and/or concatenated data streams according to the quality of service, and the quality of service is usually based on services. Compared with the prior art, the prior art cannot transmit different services according to the quality of service.
  • the embodiment of the present invention can meet the service quality requirements of different modes of services while supporting high-speed transmission.
  • the embodiment of the present invention first reorders the received divided and/or concatenated data streams according to the quality of service, and the quality of service is differentiated according to the service mode, so that the services of different modes can be
  • the data flow is rearranged and compared with the prior art for the multi-mode service.
  • the embodiment of the present invention can satisfy the service quality of different mode services in the case where multiple modes of services coexist. Requirements, but also support high-speed transmission.
  • FIG. 1 is a schematic diagram of a MAC-hs entity on a UTRAN side according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a user-side MAC-hs entity in an embodiment of the present invention
  • FIG. 3 is a flowchart of a data sending method according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of a data receiving method according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a network side device according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a user side device according to an embodiment of the present invention.
  • Embodiments of the present invention provide a data sending method, a data receiving method, a network side device, and a user side.
  • the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
  • FIG. 1 is a schematic diagram of a MAC-hs entity on a UTRAN side according to an embodiment of the present invention.
  • the embodiment of the present invention evolves correspondingly to the function and architecture of a UTRAN-side MAC-hs entity in an existing high-speed packet access system.
  • the data streams from different high-level logical channels are allocated to different priority queues, and the data flows in the queue are scheduled according to the priority.
  • the outputted scheduled data stream is segmented and/or cascaded according to the size of the air interface data transfer block (TB), so that the air interface resources can be fully utilized and unnecessary overhead can be reduced.
  • TB air interface data transfer block
  • the data stream after segmentation and/or cascading is transmitted.
  • the service has high error rate requirement and low delay requirement, for example, AM mode service. Or other mode service requiring high bit error rate, buffering the divided and/or concatenated data streams, and waiting for retransmission when the data stream fails to transmit; when the service has low bit error rate requirements, and
  • the delay requirement is high, such as UM or transparent mode service, the data stream after the segmentation and/or cascading is not cached, and there is no need to wait for retransmission when the data stream transmission fails.
  • the embodiment of the present invention can meet the service quality requirements of different mode services when supporting high-speed transmission.
  • the divided and/or concatenated data streams may be multiplexed to generate TB, and then the bottom layer transmission in the TB manner, for example, HARQ transmission.
  • the embodiment of the present invention also changes the user side MAC-hs entity accordingly.
  • FIG. 2 is a schematic diagram of a user-side MAC-hs entity according to an embodiment of the present invention.
  • the TB transmitted by the network side is received first, and then the received TB is demultiplexed to obtain a network-side MAC-hs entity segmentation.
  • the data stream output by the cascading module such as MAC SDU (Service Data Unit, ServiceDataUnit).
  • the data streams are allocated to different re-arranged queues, and the received data streams are rearranged according to the service quality of different modes of service, so that each mode service corresponds to a re-arrangement mode, for example, an acknowledgement mode ( AM, Acknowledged Mode) rearrangement and non-acknowledgement mode (UM, Unacknowledged Mode) rearrangement, etc., at the same time, when the service is in the AM mode, a status report is generated according to the rearrangement result, and the status report notification data is sent to the network side.
  • the stream receives the situation, and then requests the network side to retransmit according to the receiving situation; when the service is in the UM mode, the status report is not generated, and the network side retransmission is not requested.
  • the rearranged data is then reassembled and the data streams are delivered to the respective logical channels based on the field indications in the reassembled data stream.
  • Step 301 The MAC-hs entity receives a high-level data stream.
  • Step 302 The priority queue module presets the priority of each queue, such as 1 - 8, 1 is the highest priority, and so on.
  • the data streams from the higher layer logical channels are then allocated to different priority queues according to the QoS, and the QoS can be obtained by parameters carried by the upper layer.
  • the data stream in the queue is then scheduled according to priority, and the data stream in one or more queues can be transmitted at each transmission time interval ( ⁇ , transmission time Interval).
  • Step 303 Since the high-level data stream received by the MAC-hs entity is a fixed size, such as a MAC-d PDU (Protocol Data Unit), when the MAC-d PDU cannot exactly meet an air interface data transmission block (TB, When the size of the transport block ), the splitting and/or cascading module receives the scheduled data stream output by the priority queue module, and then splits and/or cascades the data stream according to the size of the TB, for example, when the data unit occupies the storage When the space is larger than the size of the air interface data transmission block, one data unit is divided into at least two parts; when the storage space occupied by the data unit is lower than the size of the air interface data transmission block, multiple data units are cascaded so as to satisfy one The size of the TB can prevent data from being too large to be transmitted, or waste air resources.
  • TB Air interface data transmission block
  • the split and/or concatenated data streams are usually transmitted according to the quality of service, and the quality of service is differentiated according to the service mode.
  • the quality of service is differentiated according to the service mode.
  • For the AM mode data stream it is not sensitive to the delay, but the bit error rate is required. Highly, the type of data stream is buffered in the retransmission buffer module, waiting for retransmission when the data stream fails to transmit, ensuring a lower bit error rate; and for the UM or transparent mode data stream, due to its delay Sensitive, but features that require less bit error rate, do not need to cache the data stream.
  • Step 304 Perform multiplexing on the data stream output after segmentation and/or cascading to generate TB.
  • Step 305 Receive a TB generated by multiplexing, and place the TB into one of the processes for bottom layer transmission, such as HARQ transmission.
  • step 304 is an optional step that can be used for splitting and/or cascading data streams. If no multiplexing is performed, step 305 is directly executed.
  • Step 401 Receive a data transmission block sent by the network side, and perform single-bit signaling feedback on the received data transmission block. For each process, if the reception is correct, feedback ACK, request the network side to send new data; if receiving error, feedback NACK, request network side retransmission until the maximum number of retransmissions or transmission is correct.
  • Step 402 Demultiplexing the received data transport block to obtain one or more network-side MAC-hs entity partitioning and/or cascading output data streams.
  • Step 403 Send the divided and/or concatenated data streams to respective corresponding queues according to field parameters in the data header.
  • the data stream is usually sent to the corresponding queue according to the queue number field in the data header.
  • the queue number field indicates the priority number corresponding to the network side priority queue.
  • Step 404 Rearrange the data stream according to a transmission sequence number (TSN, Transmission Sequence Number) and different modes.
  • TSN Transmission Sequence Number
  • the network side may display signaling (such as radio resource control).
  • the signaling is negotiated with the user side.
  • the priority queue on the network side corresponds to the service mode on the user side.
  • different reordering algorithms can be set for different reorder queues. Therefore, after receiving the data stream, the user side can perform different mode reordering for the data stream according to the queue number field in the data header.
  • the data stream is usually rearranged according to the quality of service, and the quality of service is differentiated according to the service mode.
  • the data stream of the UM or transparent mode is sent to the UM mode reordering module, and the data stream of the AM mode is sent to the AM mode.
  • a status report can be generated during reordering, and sent to the network side to notify the data stream reception condition, so that the network side can perform retransmission or new data transmission; and the UM mode Due to the delay sensitivity characteristics of the data stream, there is no need to generate a status report, and the rearranged data stream is directly delivered to the upper layer.
  • Step 405 The reassembly module reassembles the received reordered data stream, where the reassembled data stream is a data stream scheduled on the network side.
  • Step 406 Send the reassembled data stream to the corresponding logical channel according to the field parameter in the data header.
  • the data is transmitted by using the HARQ method, and in addition, the data may be transmitted by using continuous ARQ, selecting a retransmission ARQ, or the like.
  • the scheduled data stream is segmented and/or concatenated, and the divided and/or concatenated data streams are transmitted according to the quality of service.
  • the other program may be stored in a computer readable storage medium, and when executed, the program includes the following steps:
  • the reorganized data stream is reassembled, and the reassembled data stream is sent to the respective logical channel.
  • the storage medium may be a ROM, a RAM, a magnetic disk or an optical disk, or the like.
  • the network side device is described below with reference to FIG. 5, where the network side device includes:
  • the queuing unit 501 is configured to allocate data streams of different logical channels to the priority queue, and schedule the data flows in the queue according to the priority order. Wherein, when scheduling the data streams in the queue, each TTI can transmit data streams of one or more queues.
  • the segmentation and/or cascading unit 502 is configured to divide and/or cascade the data stream output by the queuing unit 501 according to the size of the TB.
  • the unit is divided into at least two parts; when the storage space occupied by the data unit is lower than the size of the air interface data transmission block, the plurality of data units are cascaded so as to meet the size of one TB, thereby preventing the data from being too large to be transmitted. Or too little waste of air resources.
  • the transmission unit 506 therein includes:
  • the buffer unit 503 is configured to cache the data stream output by the segmentation and/or the cascading unit 502 when the service is in the AM mode, and wait for retransmission when the underlying data transmission fails.
  • the multiplexing unit 504 is configured to multiplex the data stream output by the segmentation and/or cascading unit 502 to generate a data transmission block, and multiplex the data stream output by the buffer unit 503 to generate a data transmission block.
  • the bottom layer transmission unit 505 is configured to perform bottom layer transmission on the data transmission block sent by the multiplexing unit 504. It should be noted that the underlay transmission unit 505 can transmit data TB by using HARQ, continuous ARQ, selective retransmission ARQ, and the like.
  • multiplexing unit 504 can be integrated inside the underlying transmission unit 505.
  • the user side device is described below with reference to FIG. 6, and the user side device includes:
  • the receiving unit 601 is configured to receive a data transmission block sent by the network side, perform single-bit signaling feedback on the received data, and request the network side to send new data when the feedback is received correctly, and request the network when the feedback is received incorrectly. The transmission is repeated until the maximum number of retransmissions or the transmission is correct.
  • the demultiplexing unit 602 is configured to demultiplex the received data transmission block to obtain one or more data streams that are divided and/or cascaded.
  • the distribution unit 603 is configured to send the data streams output by the demultiplexing unit 602 to different corresponding queues according to field parameters (such as a queue number field) in the data header.
  • the rearrangement unit 604 is configured to rearrange the data stream output by the distribution unit 603 according to the TSN and different service modes.
  • the report generating unit 605 is configured to generate a status report according to the result of the rearranging unit 604 when the service is in the confirm mode, and send the status report to the network side to notify the data stream receiving situation.
  • the reorganization unit 606 is configured to reassemble the data stream obtained by the rearrangement unit 604 to obtain a data stream scheduled on the network side.
  • the allocating unit 607 is configured to send the data stream processed by the reorganization unit 606 to the respective logical channel.
  • network side device and the user side device described above may be implemented by software or hardware modules having the same or corresponding functions in addition to the above embodiments.
  • a data transmission system comprising:
  • a network side device configured to allocate data flows of different logical channels to a priority queue, and then schedule the data flows in the queue according to the priority order, and divide and/or cascade the scheduled data flows, and according to The quality of service is transmitted to the segmented and/or cascaded data stream;
  • a user equipment configured to receive the data stream that is divided and/or concatenated, and to reorder the data stream according to the quality of service, and reorganize the data stream obtained by rearranging to obtain data scheduled on the network side.
  • the stream is then sent to the respective logical channel.
  • the embodiment of the present invention needs to segment and/or cascade the scheduled data streams.
  • the segmented and/or concatenated data streams are then transmitted according to the quality of service, and the quality of service is usually differentiated according to the service mode, and the prior art cannot segment and/or cascade data according to the quality of service.
  • the embodiment of the present invention can meet the quality of service requirements of different modes of services while supporting high-speed transmission.
  • the embodiment of the present invention first reorders the received divided and/or concatenated data streams according to the quality of service, and the quality of service is differentiated according to the service mode, so that different modes of services can be used.
  • the data flow is rearranged, and compared with the prior art, the service of the multiple modes is compared with the same rearrangement mode. In the case where multiple modes of services coexist, the service of the different modes can also be satisfied. Quality requirements, but also support high-speed transmission.
  • the embodiment of the present invention needs to divide and/or cascade data streams, the air interface resources can be fully utilized, unnecessary overhead can be reduced, and data cannot be transmitted in a harsh environment.
  • the split and/or cascaded data streams are multiplexed to generate a data transport block and then transmitted in a data transport block manner, the data transmission rate can be further improved.
  • the embodiments of the present invention can be applied to other systems that need to increase the data transmission rate in addition to the applicable high-speed packet access system.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un procédé pour émettre et recevoir des données et un système de transmission de données ; un dispositif côté réseau et un dispositif côté abonné. Le procédé pour transmettre des données consiste à ordonnancer le flux de données des différents canaux logiques ; segmenter et/ou mettre en cascade le flux de données ordonnancé ; transmettre le flux de données segmenté et/ou mis en cascade conformément à la qualité du service.
PCT/CN2008/071563 2007-07-16 2008-07-07 Procédé pour émettre et recevoir des données, dispositif de côté réseau, dispositif de côté abonné et système Ceased WO2009009990A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNA2007100439930A CN101350692A (zh) 2007-07-16 2007-07-16 数据发送方法、数据接收方法、网络侧设备及用户侧设备
CN200710043993.0 2007-07-16

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WO2009009990A1 true WO2009009990A1 (fr) 2009-01-22

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CN117915146A (zh) * 2024-03-18 2024-04-19 上海朗力半导体有限公司 一种视频流传输方法和装置

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CN102843223B (zh) * 2011-06-22 2017-10-31 中兴通讯股份有限公司 一种数据重传的方法及系统
CN110493877A (zh) * 2018-05-14 2019-11-22 中国移动通信有限公司研究院 上行数据回传方法及中继设备

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CN117915146A (zh) * 2024-03-18 2024-04-19 上海朗力半导体有限公司 一种视频流传输方法和装置
CN117915146B (zh) * 2024-03-18 2024-06-04 上海朗力半导体有限公司 一种视频流传输方法和装置

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