WO2009059514A1 - Procédé et dispositif d'envoi et de réception d'informations pour la commutation de porteuse - Google Patents

Procédé et dispositif d'envoi et de réception d'informations pour la commutation de porteuse Download PDF

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Publication number
WO2009059514A1
WO2009059514A1 PCT/CN2008/072410 CN2008072410W WO2009059514A1 WO 2009059514 A1 WO2009059514 A1 WO 2009059514A1 CN 2008072410 W CN2008072410 W CN 2008072410W WO 2009059514 A1 WO2009059514 A1 WO 2009059514A1
Authority
WO
WIPO (PCT)
Prior art keywords
information
beacon message
carrier frequency
mobile terminal
delay
Prior art date
Application number
PCT/CN2008/072410
Other languages
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 WO2009059514A1 publication Critical patent/WO2009059514A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0072—Transmission or use of information for re-establishing the radio link of resource information of target access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a method and apparatus for receiving and transmitting carrier frequency switching information.
  • Wireless communication systems are being widely used to provide various wireless communication services for different users, including voice and data.
  • wireless communication systems are required to support larger bandwidths and jointly bundle multiple reference bandwidths to provide greater bandwidth services.
  • multi-carrier EV-D0 technology multiple 1.25 MHz bandwidths are bundled to support up to 15 1.25 MHz carriers to provide a larger peak rate.
  • This mode is generally called multi-carrier mode (mul t I-carr ier).
  • multiple carriers can be provided for service under one sector.
  • the cellular radio access system can also perform frequency planning. At this time, adjacent sectors can be planned into different carrier frequencies for frequency reuse planning, and good coverage can be provided at this time. This can also be understood as a multi-carrier mode.
  • the mobile terminal (MS) can flexibly switch over multiple carriers according to the signal strength and load distribution between different carriers. However, for some terminals with lower cost, there may be only one RF receiving channel. Therefore, at each moment, the mobile terminal MS can only monitor the signal on one carrier frequency. If the mobile terminal MS wants to switch to other carrier frequencies, the mobile terminal MS must Switching the RF channel to the frequency point corresponding to the other carrier frequency, and then performing signal measurement. At this time, the mobile terminal MS cannot continue to receive the data sent on the original service carrier frequency, which may cause the data transmission to be interrupted, and also because the RF channel is switched, causing the handover. The time delay is increased.
  • a beacon signal is added to the UMB.
  • the function of this signal is for the mobile terminal MS to quickly measure the signal strength of other carrier frequencies and switch.
  • BS base station
  • the destination carrier frequency so if at a certain moment, a large number of mobile terminals move to the cell edge, and also find that the beacon signal is good enough, a large number of mobile terminals MS decide to initiate the handover, but since there is only one destination carrier frequency, these mobile terminals MS are Will switch to the destination carrier frequency and perform ranging on the destination carrier frequency
  • the embodiment of the invention provides a method and a device for transmitting and receiving the carrier frequency switching information, so as to reduce the load impact of a large number of mobile terminals on the same target carrier frequency or the network moment.
  • a method for transmitting auxiliary carrier frequency switching information sending a beacon message to a mobile terminal, where the beacon message carries load information or delay information, and the load information or delay information is used to assist the mobile terminal to perform carrier frequency switching.
  • a method for receiving auxiliary carrier frequency switching information the mobile terminal receiving a beacon message, the beacon message carrying load information or delay information of a carrier frequency, wherein the load information or delay information is used to assist a mobile terminal to perform carrier frequency switching.
  • a generating module configured to generate a beacon message, where the beacon message carries load information or delay information of the carrier frequency
  • a sending module configured to send the beacon message to the mobile terminal.
  • a receiving module configured to receive a beacon message, where the beacon message carries load information or delay information of a carrier frequency
  • the reading module is configured to read load information or delay information carried by the beacon message.
  • the method and device of the embodiment of the present invention can reduce the load impact of a large number of mobile terminals on the same target carrier frequency or the network moment.
  • FIG. 1 is a schematic diagram of a base station according to an embodiment of the present invention.
  • Figure 3 is a flow chart showing the steps of the method of the present invention.
  • FIG. 4 is a schematic diagram of a base station apparatus and a mobile terminal apparatus according to an embodiment of the present invention.
  • the embodiment of the present invention provides a method for transmitting and receiving the carrier frequency switching information, which will be described in detail below through specific implementation manners.
  • one base station is divided into three sectors, and each sector uses a different carrier frequency fl/f2/f3.
  • a mobile terminal is in sector 1 (101) and moves from sector 1 (101) to sector 2 (102), and the mobile terminal needs to switch to carrier frequency under sector 2 (102).
  • Step 11 the base station pre-sets the added transition probability in the beacon message, generates a corresponding beacon message, and periodically transmits the beacon message carrying the transition probability within the coverage range;
  • Step 12 the mobile terminal receives the fan a beacon message sent by each carrier frequency in the area 2 (102), and measuring the strength of the beacon message sent by each carrier frequency, and finally selecting a beacon message sent by the carrier frequency fl in the sector 2 with a strong received signal;
  • Step 13 the mobile terminal reads the transfer probability carried in the beacon message sent by the carrier frequency fl in the sector 2;
  • the load information carried by the beacon message and the corresponding transition probability may be set as shown in Table 1, but are not limited thereto.
  • Step 14 the mobile terminal randomly generates a number between 0 and 1, such as 0.9, compares the random number with the read transition probability, and if the randomly generated number is greater than the transition probability, the mobile terminal switches to the fan.
  • This embodiment provides an embodiment for carrier frequency switching for a single mobile terminal, especially for some terminals with relatively low cost, ensuring that the mobile terminal continues to receive the original service carrier frequency only when there is only one radio frequency receiving channel. Carrier frequency switching is performed in the case of the transmitted data, thereby avoiding possible data transmission interruption.
  • both mobile terminals need to switch to the carrier frequency under sector 2 (102), including the following steps:
  • Step 21 The base station presets the added transition probability in the beacon message, and considers the priority of the user, and the users with different priorities have different transition probabilities; and the base station carries the settings in the coverage range.
  • the beacon message of the transition probability is sent periodically;
  • Step 22 The two mobile terminals receive the beacon message sent by each carrier frequency in the sector 2, and measure the strength of the beacon message sent by each carrier frequency, and finally select the carrier frequency fl in the sector 2 with the strong received signal.
  • Beacon message sent by each carrier frequency in the sector 2, and measure the strength of the beacon message sent by each carrier frequency, and finally select the carrier frequency fl in the sector 2 with the strong received signal.
  • Step 23 The two mobile terminals simultaneously read information carried in the beacon message sent by the carrier frequency fl in the sector 2;
  • the load information and the corresponding transition probability can be as shown in Table 2.
  • the value setting is performed as shown, but is not limited to this.
  • the load information and the transition probability corresponding thereto can be set as shown in Table 3, but are not limited thereto.
  • Step 24 for example, when the same load is set to 1, the transition probability read by the high priority mobile terminal is 1/8, and the transition probability read by the low priority mobile terminal is 1 /2.
  • Step 25 For example, the high-priority mobile terminal and the low-priority mobile terminal respectively generate a randomly generated number of 0.5, which is compared with the transition probability, and the high-priority mobile terminal can preferentially perform the handover.
  • Step 31 The base station presets, in the beacon message, delay information carrying a 2bi ts, the unit is a frame, and periodically transmits the beacon message carrying the set delay information in the coverage range;
  • Step 32 move The terminal receives the beacon message of the destination carrier frequency, and reads the delay information in the beacon message;
  • the delay value is set according to the system preset mapping table.
  • the mapping table can be set as shown in Table 4, but is not limited to:
  • Step 33 Prepare all mobile terminals that are switched to the target carrier frequency at the same moment, and randomly select a value as their own delay time. For example, if mobile terminal A selects 5, mobile terminal B selects 3, then mobile terminal B is 3 After the frame, the target carrier frequency is switched; the mobile terminal A needs to switch to the target carrier frequency after 5 frames, and the mobile terminal B switches to the target carrier frequency before the mobile terminal A.
  • different priorities of different mobile terminals are set, and different delay values are set to ensure that multiple mobile terminals can switch in order to switch to the same destination carrier frequency at the same time, thereby avoiding reverse of the target carrier frequency.
  • the access signal or the ranging channel causes a large instantaneous load shock, which reduces the occurrence of network congestion.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).
  • the embodiment of the present invention further provides an apparatus involved in the method of the present invention, including a base station 301 and a mobile terminal 302. Referring to FIG. 4:
  • the base station 301 includes: a generating module 3011, configured to generate a beacon message, where the beacon message carries load information or delay information of a carrier frequency, and a sending module 3012, configured to send the beacon message to the mobile terminal.
  • the generating module 3011 is further configured to further carry a transition probability corresponding to the load information or a delay value corresponding to the delay information.
  • the mobile terminal 302 includes: a receiving module 3021, configured to receive a beacon message, where the beacon message carries load information or delay information of a carrier frequency, and a reading module 3022, configured to read load information carried by the beacon message or Delayed information.
  • the mobile terminal 302 may further include: a searching module 3023, configured to search, from the mapping table, a transition probability corresponding to the load information, or a delay value corresponding to the delay information; and an operation module 3024, configured to A random number is generated between 0 and 1 to compare with the transition probability to select whether to perform carrier frequency switching, or to select carrier frequency switching according to the delay value.
  • a searching module 3023 configured to search, from the mapping table, a transition probability corresponding to the load information, or a delay value corresponding to the delay information
  • an operation module 3024 configured to A random number is generated between 0 and 1 to compare with the transition probability to select whether to perform carrier frequency switching, or to select carrier frequency switching according to the delay value.
  • the receiving module 3021 is further configured to carry a transition probability corresponding to the load information or a delay value corresponding to the delay information, where the reading module 3022 is further configured to read the beacon message. Transition probability or delay value.

Abstract

L'invention concerne un procédé et un dispositif d'envoi et de réception d'informations pour la commutation de porteuse, qui sont associés au domaine de la communication sans fil. Le procédé de l'invention consiste à envoyer une balise qui comprend des informations de charge ou des informations de retard à un dispositif portable; le dispositif portable reçoit la balise; et après un ensemble d'analyse et un calcul, le dispositif portable sélectionne une porteuse sur laquelle commuter. L'invention concerne également un dispositif associé audit procédé. Ce dispositif comprend une station de base et un dispositif portable, la station de base comprenant un moyen de génération et un moyen d'envoi; le dispositif portable comprenant un moyen de réception et un moyen d'obtention. Un des avantages présentés par l'invention est caractérisé par une baisse de la collision de charge instantanée de la station de base lorsqu'un grand nombre de dispositifs portables sélectionnent la même porteuse ou le même réseau cible.
PCT/CN2008/072410 2007-11-06 2008-09-18 Procédé et dispositif d'envoi et de réception d'informations pour la commutation de porteuse WO2009059514A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200710124299.1 2007-11-06
CNA2007101242991A CN101431775A (zh) 2007-11-06 2007-11-06 一种辅佐载频切换信息的收发方法及装置

Publications (1)

Publication Number Publication Date
WO2009059514A1 true WO2009059514A1 (fr) 2009-05-14

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CN (1) CN101431775A (fr)
WO (1) WO2009059514A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106304207A (zh) * 2015-05-15 2017-01-04 北京三星通信技术研究有限公司 多载波场景下的小区重选方法、降低小区接入负载的方法及设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6078571A (en) * 1997-09-19 2000-06-20 Motorola, Inc. Apparatus and method for transmitting beacon signals in a communication system
WO2001072080A1 (fr) * 2000-03-23 2001-09-27 Siemens Information And Communication Networks S.P.A. Programmation de canal d'acces dans un systeme de radiocommunication
CN1640062A (zh) * 2002-03-07 2005-07-13 皇家飞利浦电子股份有限公司 用于ieee802.11wlan的快速信道切换方案
CN1720756A (zh) * 2002-12-19 2006-01-11 诺基亚公司 在多频段环境中的系统和切换机制及其装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6078571A (en) * 1997-09-19 2000-06-20 Motorola, Inc. Apparatus and method for transmitting beacon signals in a communication system
WO2001072080A1 (fr) * 2000-03-23 2001-09-27 Siemens Information And Communication Networks S.P.A. Programmation de canal d'acces dans un systeme de radiocommunication
CN1640062A (zh) * 2002-03-07 2005-07-13 皇家飞利浦电子股份有限公司 用于ieee802.11wlan的快速信道切换方案
CN1720756A (zh) * 2002-12-19 2006-01-11 诺基亚公司 在多频段环境中的系统和切换机制及其装置

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