WO2008028366A1 - Procédé d'estimation d'un transfert utilisé par un terminal de diffusion multimédia mobile - Google Patents

Procédé d'estimation d'un transfert utilisé par un terminal de diffusion multimédia mobile Download PDF

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Publication number
WO2008028366A1
WO2008028366A1 PCT/CN2006/003774 CN2006003774W WO2008028366A1 WO 2008028366 A1 WO2008028366 A1 WO 2008028366A1 CN 2006003774 W CN2006003774 W CN 2006003774W WO 2008028366 A1 WO2008028366 A1 WO 2008028366A1
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WO
WIPO (PCT)
Prior art keywords
terminal
threshold
multimedia broadcast
mobile multimedia
packet
Prior art date
Application number
PCT/CN2006/003774
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English (en)
Chinese (zh)
Inventor
Xiaoguang Zhu
Biao Wang
Hua Jiang
Original Assignee
Zte Corporation
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 Zte Corporation filed Critical Zte Corporation
Publication of WO2008028366A1 publication Critical patent/WO2008028366A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/304—Reselection being triggered by specific parameters by measured or perceived connection quality data due to measured or perceived resources with higher communication quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data

Definitions

  • the present invention relates to the field of digital mobile communications, and in particular, to a handover of a mobile multimedia broadcast terminal.
  • Transmitting and receiving that is, the multimedia data information set of each broadcast monthly service in the time domain is continuously modulated on a plurality of OFDM symbols, and the mobile multimedia broadcast receiving terminal also concentrates on receiving the multimedia service during this time period, and in each frame At other times, the receiving terminal is in an off-time state to achieve terminal power saving.
  • the mobile multimedia broadcast network can broadcast different multimedia service content in different regions or at different frequencies, so when the mobile multimedia broadcast user moves to the regional junction or the receiving frequency signal is poor, switching will occur to improve the receiving service quality, and it is necessary to provide a A terminal handover decision method.
  • the mobile multimedia broadcast network adopts the one-way communication mode, that is, from the transmitter system to the mobile receiving system, and the reverse can borrow the mobile communication network to perform functions such as authentication and on-demand, so the mobile multimedia broadcast network system cannot perform handover control on the receiving terminal in real time. , causing the switching operation to be completed by the receiving terminal, that is, one-way communication switching.
  • the receiving terminal needs to prepare in advance for the handover operation, then the receiving terminal can listen to the adjacent sector channel during the service closing time, including the traffic channel or the control channel (system) Logical channel), but monitoring neighboring cells has a great impact on terminal power consumption. Therefore, it is necessary to provide a mobile multimedia broadcast terminal handover decision method.
  • the technical problem to be solved by the present invention is to provide a handover decision method for a mobile multimedia broadcast receiving terminal, which reduces the power consumption of the terminal to a minimum on the premise of improving the quality of the multimedia service received by the terminal.
  • the present invention provides a method for effectively switching a mobile multimedia broadcast receiving terminal, and the specific implementation method and the content thereof are as follows:
  • the terminal is in an active state, and the sampled data packet is calculated by a bit error rate or a frame error rate. If the error rate or the frame error rate is greater than the handover threshold, the data packet is an error packet;
  • step (b) the terminal calculates the error packet rate, determines whether the error packet rate exceeds the error packet ratio threshold, and if so, the terminal starts to listen to the neighbor channel; otherwise, returns to step (a);
  • the terminal compares the signal quality of the sector and the adjacent sectors. If the signal quality of all sectors is less than the minimum threshold required for demodulation, the terminal stops all receiving mobile multimedia broadcast services; if adjacent sectors If the signal quality is greater than the sector in which the terminal is originally located and is greater than the demodulation minimum threshold, the receiving terminal switches to the adjacent sector with the highest signal quality, otherwise it does not switch.
  • the network system side carries a CRC bit in the physical layer data packet, and the terminal determines the error rate or the frame error rate according to the CRC bit.
  • the error rate switching threshold in the step (a) is 6% to 9%.
  • the error packet ratio threshold in the step (b) is 55% to 70%.
  • the terminal monitors the neighboring cell channel according to the neighboring cell list information.
  • the neighbor list information is configured by the mobile multimedia broadcast network side system, and the neighboring area information is sent to the terminal through the air interface of the mobile multimedia broadcast system by the proprietary control channel or its overhead channel, including the number of adjacent sectors, the frequency band. , frequency and sub-network coding information, the terminal monitors adjacent sector channels according to the information.
  • the step (b) if the error packet rate is greater than the error packet ratio threshold, the terminal starts monitoring when the service is closed.
  • the signal quality in the step (c) is derived from the bit energy/interference density E b /N of the signal.
  • the present invention provides a method for handover decision of a mobile multimedia broadcast receiving terminal.
  • the bit error rate or the frame error rate is greater than a set threshold
  • the neighboring zone is started to be monitored and passed through E b /N with the neighboring cell.
  • SNR comparison if the energy per bit energy of the neighboring cell and the noise density ratio or signal to noise ratio are larger than the local sector, the terminal switches to the adjacent sector.
  • the method does not need to monitor the neighboring cell in all service closing times, and provides a method for starting the interception judgment, and the neighboring area is monitored after the condition is met, otherwise the normal service processing is performed, thereby improving the quality of receiving the multimedia service and reducing the power consumption of the terminal.
  • FIG. 1 is a schematic diagram of a mobile multimedia broadcast network based on OFDM technology according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of monitoring a multimedia broadcast network terminal according to an embodiment of the present invention
  • FIG. 3 is a physical layer data packet after adding a CRC bit according to an embodiment of the present invention
  • FIG. 4 is a flowchart of a handover decision process of a mobile multimedia broadcast receiving terminal according to an embodiment of the present invention.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.
  • Figure 1 is a schematic diagram of a mobile multimedia broadcast network based on OFDM technology. The user terminal moves in three network areas A, B and C.
  • the terminal receives a plurality of OFDM symbols in a frame per second, and the data information of each multimedia service is concentrated in consecutive symbols, that is, transmitted in a time division manner, so the terminal can monitor at a time other than receiving the monthly service every frame.
  • the terminal can perform neighboring area monitoring.
  • FIG. 2 shows that the user terminal receives the service c before and after the A network.
  • the terminal determines whether to monitor the adjacent sector channel by determining the bit error rate (BER: Bit Error Rate).
  • the mobile multimedia broadcast system needs to add a description of the associated error rate information, which is implemented by the system transmitting side in the physical layer data packet to increase the p CRC bit (Cyclic Redundancy Check: Cyclic Redundancy Check).
  • the media access layer packet has 142 bytes.
  • the physical layer data packet adds a 2-byte CRC check bit at the end.
  • the error rate is greater than the switching threshold. If it is greater than, the terminal system needs to be in the non-serving time (Off-time).
  • the data packet of the multimedia service randomly extracts a certain number of data packets to calculate the error rate. To this end, it is necessary to increase the calculation of the error packet rate, which is equal to "the number of packets larger than the switching threshold" divided by the "number of randomly extracted packets” , also set the "error packet proportional threshold", if the error packet rate exceeds the proportional threshold, start adjacent sector monitoring, otherwise you do not need to listen to adjacent sectors.
  • the terminal monitors the B and C sectors according to the neighbor list information, which is planned and configured by the mobile multimedia broadcast network system, and transmitted by the transmitter to the terminal through the air interface.
  • the information content includes the number of neighboring cells, the neighboring cell sub-network number, the neighboring cell band, and the frequency.
  • the neighboring cell number indicates the number of neighboring sectors in the area, and the neighboring cell sub-network number is the neighboring cell identifier, which can also be used by the user. Network sector, but different frequencies.
  • the frequency band of the neighboring area is the frequency band in which the spectrum of the neighboring area is located, and the frequency point of the neighboring area is the specific frequency point of the adjacent sector.
  • FIG. 4 is a flowchart of a terminal area handover decision.
  • Step 401 When the terminal is in an active state, that is, receiving a mobile multimedia broadcast service, the sample data packet is subjected to a bit error rate calculation; Step 402: If the data packet is If the error rate exceeds the threshold of 7 %, it is an error packet, and the error packet rate is calculated. The terminal determines whether the error packet rate exceeds the error packet ratio threshold by 60%. If yes, go to step 403; otherwise, continue the error packet. Rate calculation; Step 403: The terminal monitors the neighboring area according to the neighboring area list information, and obtains the neighboring area E b /N. Information: Step 404: The terminal determines the maximum E b /N of the area and the neighboring area.
  • Step 405 The terminal sets the E b /N of the zone with the neighboring zone. If the value of the local area is the largest, the process proceeds to step 401. If the value of the local area is not greater than the neighboring cell value, step 407 is performed. Step 406: The terminal ends the receiving service, that is, the terminal can no longer continue to demodulate the mobile multimedia broadcast data. End. Step 407: The terminal switches to E b /N. The neighboring area with the largest ratio receives the mobile multimedia broadcast service of the neighboring area and ends.
  • the bit error rate switching threshold may be 6% to 9%, and the error packet ratio threshold may be 55% to 70%.
  • the above error rate can also be replaced by a frame error rate, which is implemented in the same manner as the bit error rate.
  • the above E b /N. Information can also be replaced with signal to noise ratio SNR information, or other parameters that reflect signal quality.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Procédé d'estimation d'un transfert utilisé par un terminal récepteur de diffusion multimédia mobile, englobant les opérations suivantes: (a) un terminal en mode actif échantillonne des paquets de données et calcule BER et FER et, si DER ou FER est supérieur à un seuil de transfert, le paquet de données es considéré comme un paquet à erreur de bits; (b)le terminal calcule le rapport des paquets à erreurs de bit et si ce rapport dépasse un seuil correspondant, le canal écoute les canaux de cellules voisine ou bien retourne à l'opération (a); (c) le terminal compare la force du signal du secteur de desserte à celle des secteurs voisins et, si les qualités de signal de tous les secteurs sont inférieures au seuil minimum exigé par la démodulation, stoppe la réception du service de diffusion multimédia mobile; si la qualité du signal d'un secteur voisin est supérieure à celle du secteur dans lequel se trouve le terminal et supérieure au seuil de démodulation minimum, le terminal récepteur effectue un transfert vers la cellule voisine bénéficiant d'une qualité de signal maximale, ou bien n'effectue pas le transfert. Avec cette invention, il est possible d'améliorer la qualité du service multimédia reçu par un terminal tout en réduisant l'énergie consommée par ce terminal.
PCT/CN2006/003774 2006-09-01 2006-12-30 Procédé d'estimation d'un transfert utilisé par un terminal de diffusion multimédia mobile WO2008028366A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNB2006101277356A CN100450312C (zh) 2006-09-01 2006-09-01 一种移动多媒体广播终端的切换判决方法
CN200610127735.6 2006-09-01

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WO2008028366A1 true WO2008028366A1 (fr) 2008-03-13

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WO (1) WO2008028366A1 (fr)

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CN101873540A (zh) * 2010-06-10 2010-10-27 东莞市泰斗微电子科技有限公司 一种移动多媒体广播业务切换方法及相应的接收装置
CN110726809A (zh) * 2019-10-19 2020-01-24 北京工业大学 高可靠性可燃气体状态监测及报警设备设计方法
CN113012504A (zh) * 2021-02-24 2021-06-22 宜春职业技术学院（宜春市技术工人学校） 一种多人舞蹈教学互动投影方法、装置及设备

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US5383221A (en) * 1991-03-01 1995-01-17 Kabushiki Kaisha Toshiba Mobile station unit and channel switching method
CN1177266A (zh) * 1996-06-28 1998-03-25 摩托罗拉公司 启动越区切换的方法
US20010021642A1 (en) * 2000-03-13 2001-09-13 Nobuhiko Iida Mobile telecommunication system and hand-off method of radio speech paths at the system
WO2005065125A2 (fr) * 2003-12-19 2005-07-21 Interdigital Technology Corporation Transfert dans un reseau local sans fil (wlan)
CN1809211A (zh) * 2005-01-19 2006-07-26 中兴通讯股份有限公司 一种个人手持电话系统基站的切换方法

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US5987332A (en) * 1997-08-28 1999-11-16 Motorola, Inc. Method of providing a subscriber unit with neighbor cell information during ongoing communication
KR100392643B1 (ko) * 2000-12-07 2003-07-23 에스케이 텔레콤주식회사 듀얼모드 단말기의 이동성 지원을 위한 핸드오프 결정지원 방법
US6907244B2 (en) * 2000-12-14 2005-06-14 Pulse-Link, Inc. Hand-off between ultra-wideband cell sites
CN100358370C (zh) * 2003-10-17 2007-12-26 华为技术有限公司 处于接收业务状态的集群终端切换的方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5383221A (en) * 1991-03-01 1995-01-17 Kabushiki Kaisha Toshiba Mobile station unit and channel switching method
CN1177266A (zh) * 1996-06-28 1998-03-25 摩托罗拉公司 启动越区切换的方法
US20010021642A1 (en) * 2000-03-13 2001-09-13 Nobuhiko Iida Mobile telecommunication system and hand-off method of radio speech paths at the system
WO2005065125A2 (fr) * 2003-12-19 2005-07-21 Interdigital Technology Corporation Transfert dans un reseau local sans fil (wlan)
CN1809211A (zh) * 2005-01-19 2006-07-26 中兴通讯股份有限公司 一种个人手持电话系统基站的切换方法

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CN100450312C (zh) 2009-01-07

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