WO2007137476A1 - Procédé et système de gestion de puissance, dispositif réseau et terminal d'accès - Google Patents

Procédé et système de gestion de puissance, dispositif réseau et terminal d'accès Download PDF

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Publication number
WO2007137476A1
WO2007137476A1 PCT/CN2007/001231 CN2007001231W WO2007137476A1 WO 2007137476 A1 WO2007137476 A1 WO 2007137476A1 CN 2007001231 W CN2007001231 W CN 2007001231W WO 2007137476 A1 WO2007137476 A1 WO 2007137476A1
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WO
WIPO (PCT)
Prior art keywords
traffic channel
channel gain
access terminal
message
power control
Prior art date
Application number
PCT/CN2007/001231
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English (en)
Chinese (zh)
Inventor
Juejun Liu
Original Assignee
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. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2007137476A1 publication Critical patent/WO2007137476A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC

Definitions

  • the present invention relates to the field of communications and, more particularly, to power control methods, power control systems, network devices, and access terminals. Background of the invention
  • OFDMA Orthogonal Frequency Division Multiple Access
  • the interference mainly comes from the co-channel interference of the outer sector, so How to mitigate interference between cells is the key to improving the capacity of the OFDMA system. It can be reused by frequency planning to reduce interference between cells, and power control can also be used to mitigate interference between cells.
  • RDCH Gain Reverse Data Channel
  • RDCH Gain Reverse Data Channel
  • OSI external sector interference information
  • the algorithm includes: If the AT monitors that the non-serving sector is subject to large interference and its own distance from the non-serving sector is relatively close, the AT should reduce its own transmit power, ie, reduce the phase by reducing the RDCH Gain. Interference from a neighboring non-serving sector; conversely, if the AT hears that the non-serving sector is subject to little interference and is far away from the non-serving sector, the AT can increase the transmit power, ie, increase the RDCH Gain, This increases the transmission rate of itself and does not cause too much interference to the external sector.
  • the service types are rich, and the QoS priorities are different for different services and different levels of users. How to ensure the QoS priority of the service is a key technology.
  • different users and different service requirements are not considered.
  • certain higher priority users or certain services with higher QoS requirements may require special handling. For example, if a VIP user is making a call, the interference information broadcast by the surrounding sector is large, and after processing by the algorithm, the user finds that he should reduce the RDCH Gain.
  • the RDCH Gain is lowered, the user transmission performance will inevitably decrease, and the user may be The traffic being transmitted has an impact, such as a video call being made, and if the transmission rate is reduced, it may affect the quality of the videophone.
  • the existing reverse traffic channel power control algorithm of 802.20 there is no Considering the differentiation of different services for different users, all users perform power adjustment according to the broadcast interference information. Although this can appropriately mitigate the interference of external sectors, the support for service QoS requirements is poor. Moreover, for other services that require a relatively stable transmission rate, more stable RDCH Gain support may be required.
  • RLAB Reverse Link Assignment Block
  • NS-RLAB Non-Sticky Reverse Link Assignment Block, non-sticky-reverse link assignment block
  • Delta can specify the RDCH Gain used by the AT, it is only valid for the first frame of data transmission. After each frame of data transmission, the AT will perform power adjustment according to the interference information, that is, the transmit power of the AT. It is mainly adjusted according to the control of the received external sector OSI information. If the AT is required to maintain the RDCH Gain, the network side needs to send an assignment message for each frame to perform power assignment, resulting in an increase in the allocation overhead.
  • the assigned power information Delta is also valid only for the first frame of data transmission. If the AT is required to maintain RDCH Gain, the network side also needs to send an assignment message for each frame for power assignment, thereby increasing the assignment. Overhead, and power assignment flexibility is not enough. Summary of the invention
  • the power control method, the power control system, the network device, and the access terminal provided by the embodiments of the present invention can reduce system overhead and further meet different QoS service requirements while minimizing external sector interference.
  • a power control method includes: the network side sends a first message to an access terminal, where the first message carries a traffic channel gain hold period field;
  • the access terminal receives the first message, and the access terminal enters a traffic channel gain hold state according to a traffic channel gain hold period field in the first message.
  • a power control system includes: a network side and an access terminal, where the network side is provided with a message sending module, and the access terminal is provided with a determining module a message sending module, configured to send a first message, where the first message carries a traffic channel gain hold period field;
  • a determining module configured to determine a traffic channel gain hold period field in the first message sent by the message sending module, to determine whether the access terminal needs to enter a traffic channel gain hold state, and determine that the access terminal needs to enter the traffic channel gain hold In the state, the access terminal is notified to enable the access terminal to enter the traffic channel gain hold state.
  • the embodiment of the present invention further provides a network device, where the network device is provided with a message sending module, and the message sending module is configured to send a first message, where the first message carries a traffic channel gain holding period field;
  • the field in the first message sent by the message sending module is used to indicate that the access terminal enters the service channel gain holding state.
  • An embodiment of the present invention further provides an access terminal, where the access terminal is provided with a determining module, and the determining module is configured to determine a service channel gain holding period field in the first message received by the access terminal, to determine Whether the access terminal needs to enter the traffic channel gain hold state, and when determining that the access terminal needs to enter the traffic channel gain hold state, notify the access terminal to enable the access terminal to enter the traffic channel gain hold state.
  • An embodiment of the present invention further provides a power control method, including the following steps:
  • the network side carries the traffic channel gain hold period information in the first message
  • the traffic channel gain hold period information is used to indicate that an access terminal that receives the first message enters the industry The channel gain is maintained.
  • An embodiment of the present invention further provides a power control method, including the following steps:
  • the access terminal receives the first message sent by the network side, where the first message carries the traffic channel gain holding period information;
  • the access terminal enters a traffic channel gain hold state according to the traffic channel gain hold period information in the first message.
  • the embodiment of the present invention reduces system overhead while further reducing external sector interference, and further satisfies different QoS service requirements.
  • FIG. 1 is a flow chart showing a power control method according to a first embodiment of the present invention
  • FIG. 2 is a flow chart showing a power control method according to a second embodiment of the present invention
  • FIG. 3 is a schematic block diagram showing a power control system according to a fourth embodiment of the present invention. Mode for carrying out the invention
  • the network side carries the traffic channel gain hold period information in the first message, and sends the first message to the access terminal.
  • the traffic channel gain hold period in the first message may indicate that the access terminal enters the traffic channel gain hold state.
  • the access terminal receives the first message sent by the network side.
  • the access terminal determines whether the received first message carries the traffic channel gain holding period information, and after determining that the first message carries the traffic channel gain holding period information, the access terminal indicates the information according to the traffic channel gain holding period information. Enter the traffic channel gain hold state.
  • the traffic channel gain of the access terminal may no longer be affected by the non-serving sector interference.
  • the traffic channel gain of the access terminal may be a predetermined traffic channel gain, where the predetermined traffic channel gain may be the current service channel gain of the access terminal, or may be specified by the network side.
  • the traffic channel gain can also be in other forms, such as the default traffic channel gain of the access terminal, and the like.
  • the predetermined traffic channel gain is the traffic channel gain specified by the network side
  • the network side may carry the specified traffic channel gain in the first message and send it to the access terminal.
  • the access terminal may exit the traffic channel gain hold state after the predetermined period, and the access terminal may also exit the traffic channel gain hold state after receiving the exit command sent by the network side.
  • the predetermined period here can be represented by the traffic channel gain holding period information, such as when the traffic channel When the gain hold period information is non-zero, the access terminal enters the traffic channel gain hold state, and the duration in which the access terminal is in the traffic channel gain hold state is the value indicated by the traffic channel gain hold period information.
  • step S101 the network side (AN, Access Network, access network) sends an in-band signaling message to the access terminal (AT), instructing the AT to enter the RDCH Gain (traffic channel gain) hold state, where the in-band signaling
  • the message carries a RDCH Gain Hold Duration field for indicating the duration that the AT keeps the RDCH Gain unchanged.
  • the in-band signaling message may be a layer 3 in-band signaling message.
  • the format of layer 3 in-band signaling messages can be as shown in Table 3:
  • step S102 the access terminal determines whether the value of the RDCH Gain Hold Duration field is 0. If the value of the above field is 0, the AT will ignore the received in-band signaling message, and in the above field In the case where the value is not 0, the AT resets to the timer for counting the value of the RDCH Gain Hold Duration field, and will enter the RDCH Gain hold state in step S103.
  • the timing of the above timer is the value of the RDCH Gain Hold Duration field.
  • the embodiment of the present invention may further add an indication field of lbit in the inband signaling message to indicate that the AT must enter the traffic channel gain holding state. At this time, the RDCHGain in the inband signaling message Hold Duration can be a non-zero value.
  • the access terminal may stop listening to the sector interference information broadcast by the outer sector, stop updating the traffic channel gain, and perform traffic channel power transmission with a predetermined traffic channel gain.
  • the predetermined traffic channel gain may be the current traffic channel gain of the access terminal, or may be the traffic channel gain carried in the inband signaling message.
  • step S104 the AT determines whether the value of the timer is 0. If it is 0 (ie, the value of the RDCH Gain Hold Duration field decreases to 0), then to step S105, the RDCH Gain hold state is exited; If the system time is 0, the value of the timer is decremented by 1 until the timer is decremented to 0. Then, the process goes to step S105 to exit the RDCH Gain hold state.
  • the power control method ends, and then the access terminal can The OSI information of the outer sector broadcast is restarted, and the RDCH Gain is updated.
  • the AT exits the RDCH Gain hold state by the timer
  • the embodiment of the present invention is not limited thereto, for example, as will be described later in the second embodiment, this can be set by The RDCH Gain Hold Duration field value in the in-band signaling message is implemented.
  • FIG. 2 there is shown a flow chart of a power control method of a second embodiment of the present invention.
  • step S201 the network side (AN) transmits an in-band signaling message to the access terminal (AT) indicating that the AT enters the RDCH Gain (Traffic Channel Gain) hold state, wherein the in-band signaling
  • the message carries a RDCH Gain Hold Duration field, which is used to indicate the duration that the AT keeps the RDCH Gain unchanged.
  • step S202 the access terminal determines whether the value of the RDCH Gain Hold Duration field is 0. If the value of the above field is 0, the AT will ignore the received in-band signaling message, and in the above field In the case where the value is not 0, the process proceeds to step S203, and the access terminal enters the RDCH Gain hold state.
  • the access terminal may stop listening to the sector interference information broadcast by the outer sector, stop updating the traffic channel gain, and perform traffic channel power transmission with a predetermined traffic channel gain.
  • the predetermined traffic channel gain may be the current traffic channel gain of the access terminal, or may be the traffic channel gain carried in the inband signaling message.
  • step S204 the AN sends an in-band signaling message to the AT again, and the value of the RDCH Gain Hold Duration field carried therein is 0, indicating that the AT exits the RDCH Gain hold state, and the AT responds to the message, to Step S205, the AT exits the RDCH Gain hold state, and then can start monitoring the external fan again.
  • the area broadcasts the OSI information, and updates RDCH Gain.
  • the AN transmits a layer 2 assignment message to the AT through the overhead channel, such as NS-RLAB.
  • NS-RLAB Non-viscous reverse assignment message
  • the Layer 2 assignment message can also carry the RDCH Gain Hold Duration field.
  • a modified NS-RLAB message can be found in Table 4: Table 4
  • FIG. 3 shows a schematic block diagram of a power control system in accordance with a fourth embodiment of the present invention.
  • the power control system shown in FIG. 3 includes: a message sending module 302 and a determining module 304.
  • the power control system optionally further includes a timer 306.
  • the message sending module 302 can be disposed on the network side, for example, the message sending module 302 is disposed in the base station, and the determining module 304 and the timer 306 can be disposed in the access terminal.
  • the message sending module 302 is configured to send a first message (in-band signaling message or layer 2 assignment message), where the first message is used to indicate that the AT enters the RDCH Gain hold state and carries the RDCH Gain Hold Duration field;
  • the lbit indication field may also be carried to indicate that the AT must enter the traffic channel gain hold state.
  • the RDCHGain Hold Duration in the inband signaling message may be a non-zero value.
  • the determining module 304 is configured to determine whether the RDCH Gain Hold Duration field in the first message is 0, thereby determining whether the AT needs to enter the RDCH Gain hold state, where, when the RDCH Gain Hold Duration When the field is 0, the first message can be ignored; when the RDCH Gain Hold Duration field is not 0, the AT is notified to enter the RDCH Gain hold state; after the access terminal enters the RDCH Gain hold state, the access terminal can stop listening to the fan of the external sector broadcast.
  • the area interference information stops updating the traffic channel gain and performs traffic channel power transmission with a predetermined traffic channel gain.
  • the predetermined traffic channel gain here may be the current traffic channel gain of the access terminal, or may be the traffic channel gain carried in the first message.
  • the timer 306 is configured to time the duration indicated by the RDCH Gain Hold Duration field, and when the value of the timer 306 is 0, notify the AT to exit the RDCH Gain hold state. Timer 306 can be timed based on physical frames. After exiting the RDCH Gain hold state, the AT can resume listening to the OSI information of the outer sector broadcast and update the RDCH Gain.
  • the determining module 304 may notify the access terminal to exit the RDCH Gain hold state when it is determined that the RDCH Gain Hold Duration field in the first message is 0, and the AT is in the RDCH Gain hold state.
  • the first message here is a layer 3 in-band signaling message, a layer 2 assignment message, etc., and the format of the layer 3 in-band signaling message is as described in the above method embodiment.
  • the network device and the access terminal provided by the embodiments of the present invention are described in the foregoing method and system implementation manner, and are not described in detail herein.
  • the traffic channel gain of the access terminal is no longer affected by the non-serving sector interference, and the access channel's traffic channel gain remains stable.
  • the process of sending the assigned message in each frame on the network side is avoided, thereby avoiding the allocation overhead, and providing relatively stable RDCH Gain support for some services requiring a relatively stable transmission rate.
  • the access terminal is in the traffic channel gain hold state, the current traffic channel gain is adopted, and the current traffic channel gain is assigned to the access terminal by the network side according to factors such as the service QoS requirement of the access terminal, and the QoS of different services can be satisfied. demand.
  • the traffic channel gain specified by the network side is adopted, and the traffic channel gain specified by the network side may be assigned to the access terminal by the network side according to factors such as the service QoS requirement of the access terminal. It can also meet the QoS requirements of different services. Since the embodiment of the present invention provides a completely new power control method, the flexibility of power control is increased.
  • the access terminal When the access terminal is in the traffic channel gain holding state, the access terminal does not increase the traffic channel gain due to factors such as small interference of the non-serving sector, thereby avoiding the phenomenon that the external sector causes too much interference.
  • the embodiment of the present invention reduces system overhead while further reducing external sector interference, and further satisfies different QoS service requirements.

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

Abstract

L'invention porte sur un procédé de gestion de puissance comprenant les étapes suivantes: un côté réseau envoie un premier message à un terminal d'accès, ce premier message supportant des informations de durée de maintien du gain du canal de service; et le terminal d'accès reçoit le premier message, introduit ensuite l'état de maintien du gain du canal de service en fonction des informations de durée de maintient correspondantes du premier message. L'invention porte également sur un système de gestion de puissance comprenant un terminal d'accès et un côté réseau, le côté réseau comprenant un module de transmission de message et le terminal d'accès comprenant un module d'estimation, et sur un dispositif réseau comprenant un module de transmission de message, et sur un terminal d'accès comprenant un module d'estimation.
PCT/CN2007/001231 2006-05-25 2007-04-16 Procédé et système de gestion de puissance, dispositif réseau et terminal d'accès WO2007137476A1 (fr)

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CN200610083004.6 2006-05-25
CN2006100830046A CN101047410B (zh) 2006-05-25 2006-05-25 功率控制方法及系统

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US20090215490A1 (en) * 2008-02-27 2009-08-27 Mediatek Inc. Methods for handling proactive commands for one or more subscriber identity cards and systems utilizing the same
JP5297860B2 (ja) * 2009-03-30 2013-09-25 株式会社日立製作所 移動体通信装置および移動体通信システム
CN108353363B (zh) * 2015-11-10 2021-03-26 瑞典爱立信有限公司 用于确定上行链路功率控制目标的方法和基站
CN113542935A (zh) * 2020-04-22 2021-10-22 华为技术有限公司 一种信号帧的处理方法及相关设备

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CN1578187A (zh) * 2003-07-12 2005-02-09 Lg电子株式会社 用于移动通信系统的功率控制方法
CN1685745A (zh) * 2002-08-08 2005-10-19 弗拉里奥恩技术公司 操作多种状态中的移动节点的方法和设备

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US6167273A (en) * 1999-04-28 2000-12-26 Nokia Mobile Phones Ltd. Apparatus, and associated method, for effectuating power control to maintain desired QoS levels in the performance of a communication service
BR0106881A (pt) * 2000-06-28 2002-05-07 Samsung Electronics Co Ltd Método e aparelho de transmissão de dados inversa em sistema de comunicação móvel

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CN1685745A (zh) * 2002-08-08 2005-10-19 弗拉里奥恩技术公司 操作多种状态中的移动节点的方法和设备
CN1578187A (zh) * 2003-07-12 2005-02-09 Lg电子株式会社 用于移动通信系统的功率控制方法
US20050014524A1 (en) * 2003-07-15 2005-01-20 Lott Christopher G. Reverse link differentiated services for a multiflow communications system using autonomous allocation

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