WO2012058965A1 - Procédé et terminal capable d'accéder à un réseau - Google Patents

Procédé et terminal capable d'accéder à un réseau Download PDF

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Publication number
WO2012058965A1
WO2012058965A1 PCT/CN2011/078438 CN2011078438W WO2012058965A1 WO 2012058965 A1 WO2012058965 A1 WO 2012058965A1 CN 2011078438 W CN2011078438 W CN 2011078438W WO 2012058965 A1 WO2012058965 A1 WO 2012058965A1
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WO
WIPO (PCT)
Prior art keywords
terminal
delay time
access delay
waiting time
access
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PCT/CN2011/078438
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English (en)
Chinese (zh)
Inventor
邓云
戴谦
艾建勋
毛磊
Original Assignee
中兴通讯股份有限公司
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Publication of WO2012058965A1 publication Critical patent/WO2012058965A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment

Definitions

  • the present invention relates to the field of communications, and in particular to a method and terminal for a terminal to access a network.
  • H2H Human to Human
  • M2M Machine to Machine
  • M2M Machine to Machine
  • M2M Machine to Machine
  • M2M is an intelligent machine terminal based on a variety of communication methods to provide customers with information solutions to meet customer information needs for monitoring, command and dispatch, data acquisition and measurement.
  • the development of wireless technology is an important factor in the development of the M2M market.
  • M2M can be applied to industrial applications, home applications, personal applications, and the like. Among them, industry applications such as: traffic monitoring, warning systems, maritime rescue, vending machines, paying for cars, etc.; household applications such as: automatic meter reading, temperature control, etc.; personal applications such as: life detection, remote diagnosis, etc.
  • the communication object of M2M is machine-to-machine or person-to-machine.
  • Data communication between one or more machines is defined as MTC (Machine Type Communication), in which case human interaction is less required.
  • MTC Machine Type Communication
  • a machine participating in MTC is defined as an MTC device (hereinafter also referred to as an MTC terminal).
  • MTC terminal can communicate with other MTC terminals or MTC servers through a PLMN (Public Land Mobile-communication Network) network.
  • PLMN Public Land Mobile-communication Network
  • MTC devices In view of the large number of MTC devices and the number of H2H devices (User Equipments), which are not more than an order of magnitude, the widespread use of MTC devices is likely to overload the network, such as when a cell suddenly experiences a power outage. When the power is restored, many MTC devices may try to access the network at the same time, which will Causes the network to be overloaded. In order to cope with the overload caused by the introduction of the MTC device, the network side needs to improve the overload control capability.
  • the existing protocol requires a new processing overload capability for the core network element, such as the MME of the Long Term Evolution (LTE) system.
  • Mobility Management Entity which implements APN-based overload control according to the traffic volume of the APN (Access Point name) reported by the MTC device (the maximum number of active bearers, the maximum bearer rate, etc.).
  • the registration rejection (Attach Reject) and the location area update rejection may be sent to the UE.
  • the base station on the network side also needs to have the capability of implementing different access control according to the identity of the access terminal (whether it is an MTC device), such as the RRC Connection Reject or RRC connection through the RRC (Radio Resource Control) connection. Release signaling limits access to certain MTC devices.
  • 1 is a schematic diagram of a RRC (Radio Resource Control) connection rejection process in the prior art. As shown in FIG.
  • Step 102 The MTC device initiates random access and sends an RRC connection request. (RRC Connection Request) message to the network side;
  • Step 104 If the network side resource is tight or other reasons at this time, the network side may send an RRC Connection Reject signaling to reject the connection request of the MTC device, and in the signaling The value of the Wait Time is used to limit the MTC device from re-acquiring random access during this period of time.
  • the MTC device After receiving the RRC Connection Reject signaling, the MTC device notifies the upper layer that the RRC connection establishment fails, and sets the terminal local timer T302 to the value indicated by the Wait Time and starts. Before the T302 times out, the wireless connection establishment request cannot be initiated again. .
  • the current value of the Wait Time in the protocol is 1-16 seconds.
  • the RRC connection refusal can only be applied to the MTC device to initiate the connection.
  • the RRC Connection Release is used to reject the access of the MTC device. In the existing protocol, the RRC connection releases the cell that does not carry the Wait Time, and the idea of the Wait Time can be introduced into the RRC connection release.
  • a main object of the present invention is to provide a method and a terminal for a terminal to access a network, so as to at least solve the problem that the foregoing multiple MTC devices release the RRC connection request again, which still causes a large number of impacts on the network, and even causes network overload.
  • a method for a terminal to access a network including: determining, by the terminal, a waiting time required for re-accessing the network side when receiving the RRC connection release signaling sent by the network side; When the terminal determines that the time it has waited for is equal to or exceeds the waiting time, the terminal allows an RRC connection request to be initiated to the network side.
  • the determining, by the terminal, the waiting time for re-accessing the network side includes: the terminal acquiring a preset access delay time, and determining a waiting time according to the access delay time.
  • the terminal acquires a preset access delay time, including one of the following:
  • the RRC connection release signaling acquires the access delay time; the terminal acquires the access delay time according to the system message of the network side; the terminal acquires the access delay time according to a manner predefined by the protocol.
  • the terminal determines the waiting time according to the access delay time, and includes one of the following: the terminal determines that the waiting time value is equal to the access delay time value; and the terminal determines the waiting time value a value equal to 0 to a random value between the access delay time values; the terminal determining that the waiting time value is equal to a product of the access delay time value and an adjustment factor, wherein the adjustment factor is based on the RRC connection release letter Or determining, by the network side, a system message or a protocol pre-defined manner; the terminal determining that the waiting time value is equal to a sum of the access delay time value and a random value.
  • the obtaining the access delay time according to the pre-defined manner of the protocol includes: obtaining, by the terminal, the access delay time according to a combination of any one or more of the following: a type and a location of the terminal.
  • the determining, by the terminal, the waiting time for re-accessing the network side, the terminal includes: releasing, by the terminal, the release reason by using the RRC connection release signaling, and determining a waiting time according to the release reason.
  • the release cause comprises overloading on the network side.
  • the method further includes: transmitting, by the RRC layer of the terminal, the waiting time to an upper layer of the terminal; Terminal has When the waiting time is less than the waiting time, the upper layer of the terminal refuses to send the RRC connection request to the network side.
  • a terminal including: a determining unit, configured to determine, when receiving an RRC connection release signaling sent by a network side, a waiting time required for the terminal to re-access the network side; And setting to initiate an RRC connection request to the network side when it is determined that the time that the terminal has waited for equal to or exceeds the waiting time.
  • the determining unit is further configured to acquire a preset access delay time, and determine a waiting time according to the access delay time.
  • the determining unit is further configured to acquire the access delay time according to the RRC connection release signaling; or obtain the access delay time according to the system message of the network side; or, according to the protocol The defined access time is obtained in a defined manner.
  • the determining unit is further configured to determine that the waiting time value is equal to the access delay time value; or determine that the waiting time value is equal to a random value between 0 and the access delay time value; Or determining, that the waiting time value is equal to a product of the access delay time value and an adjustment factor, where the adjustment factor is determined according to the RRC connection release signaling or a system message or a protocol predefined manner of the network side; Alternatively, it is determined that the waiting time value is equal to a sum of the access delay time value and a random value.
  • the determining unit is further configured to acquire the access delay time according to a combination of any one or more of the following: a type of the terminal, a priority of the terminal, and an application service initiated by the terminal.
  • the determining unit is further configured to acquire a release reason by using the RRC connection release signaling, and determine a waiting time according to the release reason.
  • the terminal when receiving the RRC connection release signaling sent by the network side, the terminal determines the waiting time required for re-accessing the network side, that is, determining, by each terminal, the RRC connection release signaling.
  • a waiting time instead of using the same waiting time as other terminals, avoids the subsequent RRC connection request with a large number of terminals simultaneously causing a large impact on the network, and even causing network overload.
  • FIG. 1 is a schematic diagram of a connection denial process according to the related art
  • FIG. 2 is a process flow diagram of a method for a terminal to access a network according to an embodiment of the present invention
  • FIG. 3 is a base station selecting a low priority MTC device according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.
  • the embodiments in the present application in the case of a large number of MTC devices, if the MTC device obtains the Wait Time through the RRC connection release, after the timer corresponding to the Wait time expires, the plurality of MTC devices will simultaneously initiate an RRC connection request, and the network will still be sent to the network. A lot of shocks are generated, and even the network is overloaded.
  • the embodiment of the present invention provides a method for a terminal to access a network. The processing flow is as shown in FIG.
  • Step 202 When the terminal receives the RRC connection release signaling sent by the network side, the terminal determines itself. Re-accessing the waiting time required by the network side; Step 204: When the terminal determines that the time it has waited for is equal to or exceeds the determined waiting time, the terminal allows the RRC connection request to be initiated to the network side.
  • the premise that the terminal re-initiates the RRC connection request to the network side is that the non-access stratum of the terminal needs to initiate signaling services or data services.
  • the terminal has a service requirement, the terminal needs to maintain the waiting state before the timer corresponding to the waiting time expires, and the RRC connection request may not be initiated.
  • the terminal when receiving the RRC connection release signaling sent by the network side, the terminal determines the waiting time required for re-accessing the network side, that is, determining, by each terminal, the RRC connection release signaling.
  • a waiting time instead of using the same waiting time as other terminals, avoids the subsequent RRC connection request with a large number of terminals simultaneously causing a large impact on the network, and even causing network overload.
  • the terminal determines that the waiting time for re-accessing the network side can be determined by multiple methods. For example, a preferred method is: the terminal acquires a preset access delay time, and determines according to the access delay time. waiting time. The access delay time may be obtained in multiple manners.
  • the terminal acquires an access delay time according to the RRC connection release signaling.
  • the terminal acquires an access delay time according to the system message of the network side;
  • the terminal obtains the access delay time according to its own predefined manner in the network side (ie, the protocol pre-defined way).
  • the access delay time can be obtained.
  • the specific implementation manner is determined according to actual conditions.
  • the waiting time is determined according to the access delay time, and the terminal determines that the waiting time value is equal to the access delay time value; or the terminal determines that the waiting time value is equal to 0 to the access delay time.
  • the waiting time value is a random value in [0, 20]; or the terminal determines that the waiting time value is equal to the product of the access delay time value and the adjustment factor, wherein the adjustment factor is based on the RRC connection release signaling or the network side
  • the system message or the terminal is determined by the network side pre-defined (ie, protocol pre-defined), for example, the adjustment factor is a random value in [0, 1], and if the adjustment factor takes a value of 0.1, the current terminal determines its waiting time.
  • the value is one tenth of the value of the access delay time.
  • the terminal may determine that the waiting time value is equal to the sum of the access delay time value and the random value.
  • the random value N is a natural number, N can take the values 0, 1, 2, 3, etc., the access latency value equal to the delay time sum of the N values.
  • the terminal obtains the access delay time according to the manner defined by the terminal and the network side, including: The terminal acquires the access delay time according to the combination of any one or more of the following: the type of the terminal, the priority of the terminal, and the terminal initiated. The priority of the application service, whether the terminal is roaming, the access level of the terminal on the network side, and the group to which the terminal belongs.
  • the terminal obtains the release reason by releasing the signaling through the RRC connection, and determines the waiting time according to the release reason, where the release cause includes the network side overload.
  • the method for the terminal to access the network provided by the embodiment of the present invention may be applied to the H2H device (ie, the UE), and may also be applied to the M2M device, that is, the MTC device, which is described in several specific embodiments.
  • Embodiment 1 In an LTE system, different types of terminals include an H2H device and an MTC device access network, and some are in a connected state, and some are in an idle state. At a certain moment, the core network sends an indication of overload control to the base station due to the increased load of the core network.
  • the base station selects some terminals according to the type of the terminal, the priority of the service initiated by the terminal, or the priority of the terminal.
  • the release is implemented, for example, the MTC device may be selected for release, or the low priority terminal is released, or the terminal with low service priority is selected to release the load on the network side.
  • the base station selects the low-priority MTC device to release its RRC connection, and the release process is as shown in FIG. 3: Step 302: The base station sends an RRC connection release signaling to the MTC device, where the signaling includes the access.
  • Step 304 After receiving the RRC connection release signaling, the MTC device obtains an access delay time; the MTC device sets a timer equal to the access delay time, and starts the timer; before the timer expires, The MTC device cannot initiate an RRC connection request again. When the timer expires, the MTC device generates a random time again. During the random time period, the MTC device cannot still initiate the RRC connection request again. The MTC device can initiate an RRC connection request again only after the random time expires.
  • the random time length generated by the MTC device may be referenced by the access delay time.
  • the MTC device generates a uniformly distributed random number between 0 and 1, and multiplies the random number by the access delay time to obtain a random time.
  • the MTC device randomly generates a random time within a predetermined time (eg, within 10 seconds or within 10 minutes).
  • the MTC device needs to generate a random time again after the timer expires. Only after the random time expires can the RRC connection request be initiated again, so that a large number of MTC devices can be avoided.
  • accessing the network again at the same time can discretize the time when different MTC devices access the network again.
  • the latency of the MTC device is equal to the access delay time value plus a random value.
  • the MTC device may directly generate a random number that is less than the access delay time, and the waiting time is equal to the generated random number.
  • the RRC connection release signaling further includes an adjustment factor, after the MTC device receives, the waiting time of the MTC device is the product of the access delay time and the adjustment factor; or the waiting time is equal to the product of the access delay time and the adjustment factor. Add a random time.
  • the MTC device can initiate an RRC connection request again only after the waiting time has expired.
  • the eNB may carry the information of the multiple terminals that need to be released in the RRC connection release signaling. For example, if the terminal belongs to a certain group, the base station may carry the identifier of the group in the RRC connection release, so that a letter may be passed. The connection of all the groups is released; or the base station directly carries the identifiers of the multiple terminals in the RRC connection release signaling, so that the group release can also be achieved. The base station can transmit the group release signaling on the common channel, so that the terminal can detect the signal released by the community.
  • the terminal in order to make different terminals again When accessing the network, the terminal can be staggered, and the terminal introduces a random time according to the access delay time in the release signaling, and can be staggered again.
  • WCDMA Wide-band Code Division Multiple Access
  • GERAN Global System for Mobile communication Edge Radio Access Network
  • RRC Radio Network Controller
  • Embodiment 2 In an LTE system, different types of terminals include an H2H device and an MTC device access network, and some are in a connected state, and some are in an idle state. At some point, the base station detects that its own load is high, or through background operation and maintenance.
  • the server detects that the core network is heavily loaded, and the base station makes a decision to release some of the terminals.
  • the base station selects the release of the lower priority terminal according to the priority of the service.
  • the base station sends an RRC connection release signaling to the terminal, where the signaling includes a release reason.
  • the terminal sets the waiting time according to the access delay time in the system message. It should be noted that the terminal may read the access delay time in the system message when receiving the release signaling, or obtain the access delay time in the system message before receiving the release signaling, if the terminal acquires in advance After the access delay time, the terminal applies the parameter only after receiving the signaling of the RRC connection release.
  • the access delay time is not included.
  • the system message can set the corresponding access delay time for different types of terminals: You can set the corresponding access delay time for terminals of different priorities. For example, the meter-type terminal can be tolerated for a long time.
  • the priority can be set to a lower priority. For the terminal of the monitoring or alarm type, it needs to be reported immediately.
  • the priority of the data needs to be set to normal priority or high priority.
  • the priority of the terminal can be divided into two or more priority levels according to different application types.
  • the access delay time (the priority of the service can be set according to the service quality parameter of the service); the corresponding access delay time can be set for the terminal that is roaming; the corresponding connection can be set for different groups to which the terminal belongs Incoming delay time; corresponding access delay can be set for the access level of the terminal Time (the access level is saved in the user's card of the terminal).
  • the terminal may set the waiting time according to the following manner: the waiting time is equal to the access delay time; or, the waiting time is a random value less than the access delay time; or The wait time is equal to the access delay time plus a random time. The timer that starts the waiting time of the terminal, and the terminal cannot initiate again before the timer expires.
  • the RRC layer of the terminal notifies the upper layer (ie, the non-access stratum of the terminal) the waiting time, so that the upper layer of the terminal can no longer initiate the service establishment request within the time.
  • different types of terminals include an H2H device and an MTC device access network, and some are in a connected state, and some are in an idle state.
  • the base station detects that its own load is high, or the background operation and maintenance server detects that the load of the core network is high, and the base station makes a decision to release part of the terminal. In this embodiment, the base station selects the release of the lower priority terminal according to the priority of the service.
  • the base station sends an RRC connection release signaling to the terminal, where the signaling includes a release reason.
  • the terminal obtains the access delay time according to the pre-defined manner of the protocol.
  • the predefined manner of the protocol may include one of the following scenarios or a combination thereof:
  • the access delay time is pre-defined according to the type of the terminal, such as The access delay time of the MTC device is 600 seconds.
  • the access delay time is pre-agreed according to the priority of the terminal. For example, the access delay time of the low-priority MTC device is 1000 seconds, and the high-priority MTC device is connected.
  • the access delay time is 200 seconds, and the access delay time of the H2H device is 0 seconds.
  • the access delay time is pre-agreed according to the priority of the application service initiated by the terminal, such as pre-arranging the connection of the terminal that has established or initiated the establishment of the high priority service.
  • the access delay time is 200 milliseconds, and the access delay time of the terminal that has established or initiated the establishment of the low priority service is 500 milliseconds; the access delay time is pre-agreed according to the access level of the terminal, such as pre-arranging an access level (Access) Class)
  • the access delay time of the terminal Each terminal has an associated AC level.
  • Each connection is pre-agreed.
  • the access delay time corresponding to the level; the access delay time is pre-agreed according to the group to which the terminal belongs.
  • the access delay time of the terminal of the partial group is 200 seconds, and the access delay time of the terminals of other groups is 0 seconds;
  • the access delay time is pre-agreed according to whether the terminal is roaming.
  • the access delay time of the terminal that is roaming in advance is 300 seconds, and the access delay time of the terminal without roaming is 0 seconds.
  • USIM card at the terminal may also include EHPLMN (Equivalent Home PLMN) If the current network is not HPLMN, it indicates that the terminal is a roaming terminal; or if the current network is neither HPLMN nor EHPLMN, the terminal is a roaming terminal.
  • the terminal can obtain the PLMN identity of the network to which the accessed cell belongs by using the system message, and can determine whether it is roaming according to the HPLMN and the EHPLMN in the USIM card.
  • the terminal After the terminal obtains the access delay time, set the waiting time according to one of the following ways: the waiting time is equal to the access delay time; the waiting time is a random value less than the access delay time; the waiting time is equal to the access delay time and the adjustment factor
  • the product, the adjustment factor is also pre-agreed; the waiting time is equal to the access delay time plus a random time.
  • the timer that starts the waiting time of the terminal, and the terminal cannot initiate again before the timer expires.
  • the RRC layer of the terminal notifies the upper layer (ie, the non-access stratum of the terminal) the waiting time, so that the upper layer of the terminal can no longer initiate the service establishment request within the time.
  • different types of terminals include an H2H device and an MTC device access network, and some are in a connected state, and some are in an idle state.
  • the core network sends an indication of overload control to the base station due to the increased load of the core network. After the base station obtains the indication of the overload control, the base station selects some terminals according to the type of the terminal, the priority of the service initiated by the terminal, or the priority of the terminal.
  • the release is implemented, for example, the MTC device may be selected for release, or the low priority terminal is released, or the terminal with low service priority is selected to release the load on the network side.
  • the base station selects the released terminal according to whether the terminal is roaming.
  • the core network needs to indicate to the base station whether the terminal is roaming, or the terminal reports to the base station whether it roams, and then the base station sends an RRC connection release letter to the roaming terminal.
  • the base station selects the roaming MTC device to release, and sends the RRC connection release signaling to the roaming MTC device; or the base station selects the roaming low priority terminal to release, and sends the RRC connection release signaling to the roaming low priority terminal.
  • the reason for the release in the signaling is the network side overload.
  • the terminal After receiving the reason for the release, the terminal obtains the access delay time according to the pre-defined method of the protocol, and the protocol may pre-agreed the access delay time corresponding to different release reasons. If the network side overload is agreed, the access delay time is 500 seconds. In order to reduce the impact on the existing protocol, for the reason of the existing release, the access delay time can be agreed to be 0 seconds.
  • the waiting time is equal to the access delay time; the waiting time is a random value less than the access delay time; the waiting time is equal to the access delay time plus a random time.
  • the terminal starts a timer corresponding to the waiting time, and the terminal cannot initiate an RRC connection request (or random access) again before the timer expires.
  • the RRC layer of the terminal notifies the upper layer (ie, the non-access stratum of the terminal) to release the reason, so that the upper layer of the terminal can learn the release reason and take corresponding operations.
  • the embodiment of the present invention further provides a terminal.
  • the structure of the terminal is as shown in FIG.
  • a determining unit 401 configured to: when receiving a radio resource control RRC connection release command sent by the network side, determine the The waiting time required for the terminal to re-access the network side; the connecting unit 402 is configured to initiate an RRC connection request to the network side when it is determined that the time that the terminal has waited for is equal to or exceeds the determined waiting time.
  • the determining unit 401 may be configured to acquire a preset access delay time and determine a waiting time according to the access delay time.
  • the determining unit 401 may be configured to obtain an access delay time according to the RRC connection release signaling; or obtain an access delay time according to a system message of the network side; or acquire according to a manner defined by itself and the network side.
  • the determining unit 401 may be configured to determine that the waiting time value is equal to the access delay time value; or determine that the waiting time value is equal to a random value between 0 and the access delay time value; or, determine that the waiting time value is equal to The product of the access delay time value and the adjustment factor, wherein the adjustment factor is determined according to the RRC connection release signaling or the system message of the network side or the terminal and the network side predefined; or, determining that the waiting time value is equal to the access delay time value and the randomization The sum of the values.
  • the determining unit 401 may be configured to obtain an access delay time according to a combination of any one or more of the following: a type of the terminal, a priority of the terminal, a priority of the application service initiated by the terminal, whether the terminal is roaming, The access level of the terminal on the network side and the group to which the terminal belongs.
  • the determining unit 401 may be configured to acquire a release cause by the RRC connection release signaling, and determine the waiting time according to the release reason. From the above description, it can be seen that the present invention achieves the following technical effects: In the embodiment of the present invention, when the terminal receives the RRC connection release signaling sent by the network side, the terminal determines that it needs to re-access the network side.

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

Abstract

La présente invention concerne un procédé et un terminal capable d'accéder à un réseau. Selon le procédé : après qu'un terminal reçoit un signal de dégagement RRC transmis par un réseau, il détermine le temps d'attente nécessaire pour ré-accéder au réseau ; et quand le terminal confirme que son temps d'attente est supérieur ou égal au temps d'attente, il est autorisé à transmettre une demande de connexion RRC au réseau. Dans la présente invention, des impacts à grand volume sur le réseau et des problèmes possibles de surcharge de réseau dus à des demandes de connexion RRC ultérieures et simultanées en provenance de nombreux terminaux peuvent être évités.
PCT/CN2011/078438 2010-11-05 2011-08-15 Procédé et terminal capable d'accéder à un réseau WO2012058965A1 (fr)

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CN201010534376.2A CN102469554B (zh) 2010-11-05 2010-11-05 终端接入网络的方法及终端
CN201010534376.2 2010-11-05

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WO2014205621A1 (fr) * 2013-06-24 2014-12-31 华为技术有限公司 Procédé et appareil de contrôle de surcharge
WO2017026366A1 (fr) 2015-08-11 2017-02-16 日本電気株式会社 Dispositif et procédé relatifs à une connectivité double
JP6465216B2 (ja) * 2015-10-06 2019-02-06 日本電気株式会社 デュアルコネクティビティに関連する装置
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