WO2013167093A2 - Procédé et dispositif de gestion d'encombrement pour un réseau d'accès de dispositifs mtc - Google Patents

Procédé et dispositif de gestion d'encombrement pour un réseau d'accès de dispositifs mtc Download PDF

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Publication number
WO2013167093A2
WO2013167093A2 PCT/CN2013/080483 CN2013080483W WO2013167093A2 WO 2013167093 A2 WO2013167093 A2 WO 2013167093A2 CN 2013080483 W CN2013080483 W CN 2013080483W WO 2013167093 A2 WO2013167093 A2 WO 2013167093A2
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WIPO (PCT)
Prior art keywords
access
mtc device
urgency
emergency
level
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PCT/CN2013/080483
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English (en)
Chinese (zh)
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WO2013167093A3 (fr
Inventor
刘俊强
程翔
张永亮
张弛
常永宇
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中兴通讯股份有限公司
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Publication of WO2013167093A2 publication Critical patent/WO2013167093A2/fr
Publication of WO2013167093A3 publication Critical patent/WO2013167093A3/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0215—Traffic management, e.g. flow control or congestion control based on user or device properties, e.g. MTC-capable devices

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a congestion control method and apparatus when an MTC device accesses a network. Background technique
  • MTC Machine-Type Communications
  • M2M Machine-to-Machine
  • MTC device can complete the entire communication process autonomously without human intervention. Since the wireless communication network has the characteristics that the terminal side does not require manual wiring, the cost is low, and the mobility can be provided in a dangerous environment, the MTC application with the wireless communication network as the bearer has received extensive attention in the industry.
  • MTC devices are usually equipped with a wireless communication module at the front to enable their informational application solutions with existing mobile networks.
  • MTC communication over existing H2H (Human to Human) communications is that the number of communication terminals involved will be very large. If a certain number of devices in the network need to communicate data at a certain moment, network congestion will occur; this congestion may be at the data level or at the signaling level, but for the network. unacceptable. With the continuous development of MTC technology, more and more MTC devices with different characteristics will be introduced into the real network with different applications. If different network congestion is performed for each different device, Will greatly increase the complexity of the network.
  • the congestion control of the existing MTC device access network mainly adopts the following method: During the working process, the MTC device predetermines an access level according to its own type or service mode. As shown in Figure 1, the following steps are included:
  • Step S101 After determining the access level of the MTC device, the MTC device receives the Barring factor and the Barring time information corresponding to each access level broadcasted by the system network side;
  • Step S102 When the MTC device has an access requirement, it will generate a random number within the specified range;
  • Step S103 The MTC device determines whether the random number generated by itself is smaller than the access level Barring factor of the network side broadcasted by the network side, if yes, step S104 is performed; otherwise, step S105 is performed; step S104: if the random number generated by the MTC device is smaller than The Barring factor of the access level of the network side broadcasted by the network side, the device will initiate an access request, and the process ends.
  • Step S105 If the random number generated by the MTC device is not less than the Barring factor of the access level of the network side broadcasted by the network side, it will delay waiting according to the Barring time information; during the delay, it will continue to receive and update the system broadcast. Barring factor and Barring time information; After the delay ends, the MTC device will go to step S102 to continue downward.
  • the purpose of the embodiments of the present invention is to provide a congestion control method and device for accessing a network of an MTC device, which can be better applied to a large number of different types and characteristics of MTC devices in a future network.
  • a congestion control method for an MTC device access network including the following steps:
  • the machine type communication (MTC) device receives the urgency calculation criterion number of the at least one access level periodically broadcasted by the network side and the management information of the access urgency of the at least one access level;
  • the MTC device When preparing for access, the MTC device searches for the corresponding urgency calculation criterion stored in advance according to the received urgency calculation criterion number according to its own access level;
  • the MTC device calculates the self-access urgency within its own access level according to the corresponding urgency calculation criteria found;
  • the MTC device compares the self-access urgency with the allowed access urgency, and determines whether to initiate an access request according to the comparison result.
  • the determining, according to the comparison result, whether to initiate an access request includes: when the self-access urgency is greater than the allowed access urgency, the MTC device initiates an access request.
  • the management information further includes a delay waiting time of the at least one access level.
  • determining whether to initiate the access request according to the comparison result further includes: when the self-access urgency is less than or equal to the When the access urgency is allowed, the MTC device generates a random value in the delay waiting time according to its own access level, and waits for the time of the random value, receives new control information during the waiting period, and then utilizes the new control
  • the information is updated to its own access urgency, and then the updated self-access urgency is connected with the new control information. The urgency is compared to determine whether to initiate an access request.
  • the urgency calculation criterion of the at least one access level is determined by at least one of a service type, a cache state, a waiting time, a number of message retransmissions, and a generated data rate.
  • the urgency calculation criterion of the access level comprises:
  • the urgency of the service type is obtained according to the subset of the service type of the MTC device.
  • the urgency of the cache state is obtained according to the ratio of the cache size used by the MTC device to the total cache length.
  • the urgency calculation criterion of the access level is determined by the waiting time, when: the waiting time of the MTC device is within a maximum waiting time range specified by the system, according to the waiting time length of the MTC device and the system Specifying the ratio of the longest waiting time to obtain the urgency of the waiting time;
  • the MTC device When the waiting time of the MTC device exceeds the maximum waiting time range specified by the system, the MTC device initiates an access request.
  • the method includes:
  • the number of retransmissions of the MTC device is less than or equal to the maximum number of retransmissions specified by the system, the number of retransmissions of the packet is obtained according to the ratio of the retransmission coefficient of the MTC device to the maximum number of retransmissions of the packet specified by the system.
  • the MTC device adjusts its access urgency to a minimum and initiates an access request.
  • the method includes:
  • the rate of data generated by the MTC device is determined according to the maximum allowable data rate specified by the system.
  • the ratio of the rates yields the urgency of generating the data rate
  • the MTC device When the amount of data generated by the MTC device exceeds the maximum generated data rate specified by the system, the MTC device initiates an access request.
  • a congestion control apparatus for an MTC device to access a network including:
  • Receiving a control information unit configured to receive, by the MTC device, control information of the urgency calculation criterion number of the at least one access level periodically broadcasted by the network side and the access urgency of the at least one access level;
  • an emergency calculation criterion unit configured to: when the MTC device is ready to access, use the received urgency calculation criterion number to search for a pre-stored corresponding urgency calculation criterion according to the access level of the MTC device;
  • an own access urgency unit configured to calculate, by the MTC device, the self-access urgency within the access level of the MTC device according to the corresponding urgency calculation criterion found;
  • the comparison judgment initiates the access request unit, and the MTC device configures the MTC device to compare the self-access urgency with the allowed access urgency, and determines whether to initiate an access request according to the comparison result.
  • the comparison determining the initiating access request unit is further configured to initiate an access request when the self-connection urgency of the MTC device is greater than the allowed access urgency.
  • the system has high flexibility. It can accept various types of MTC devices at any time without modification.
  • the network side can flexibly configure the access urgency calculation criteria and the allowed access levels and urgency according to the actual load.
  • FIG. 1 is a schematic flowchart of a congestion control method for an MTC device accessing a network in the prior art
  • FIG. 2 is a flowchart of a congestion control method for an MTC device to access a network according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a congestion control apparatus for an MTC device to access a network according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of the correspondence between the service type subset of the MTC device and the urgency LS part;
  • FIG. 5 is a schematic diagram of the conversion relationship between the cache characteristics of the MTC device and the urgency LB part;
  • FIG. 6 is the waiting time and the urgency of the MTC device.
  • Figure 7 is a schematic diagram showing the conversion relationship between the number of retransmissions of the MTC device and the LN portion of the urgency;
  • Figure 8 is a schematic diagram of the conversion relationship between the data generation rate of the MTC device and the LR portion of the urgency;
  • FIG. 10 is a schematic diagram of the urgency calculation criterion number information applicable to each access level in the current network broadcasted by the network side in the embodiment of the present invention;
  • FIG. 10 is a schematic diagram of the urgency calculation criterion number information applicable to each access level in the current network broadcasted by the network side in the embodiment of the present invention;
  • FIG. 10 is a schematic diagram of the urgency calculation criterion number information applicable
  • FIG. 11 is a schematic diagram of allowed access urgency and delay waiting time information corresponding to each access level in the current network broadcasted by the network side in the embodiment of the present invention. detailed description
  • FIG. 2 is a flowchart of a congestion control method for an MTC device to access a network according to an embodiment of the present invention. As shown in FIG. 2, the method includes the following steps:
  • Step S201 The device type communication receives, by the network side, the contingency calculation criterion number of the at least one access level periodically broadcasted by the network side, and the management and control information of the access urgency of the at least one access level;
  • Step S202 When the MTC device is ready to access, it is connected according to its own access level.
  • the received urgency calculation criterion number is used to search for the corresponding urgency calculation criterion stored in advance;
  • Step S203 The MTC device calculates the self-access urgency within the self-access level according to the found urgency calculation criterion;
  • Step S204 The MTC device compares the self-access urgency with the allowed access urgency, and determines, according to the comparison result, whether the MTC device initiates an access request.
  • the determining, by the comparison, whether the MTC device initiates the access request includes: when the self-access urgency is greater than the allowed access urgency, the MTC device initiates an access request.
  • the control information further includes a delay waiting time of the at least one access level, and determining, according to the comparison result, whether the MTC device initiates the access request further includes: when the self-access urgency is less than or equal to the allowed access emergency At the time, the MTC device generates a random value in the delay waiting time according to its own access level, and waits for the time of the random value, receives new control information during the waiting period, and then updates its own access emergency with the new control information. Then, by comparing the updated self-connection urgency with the access urgency of the new control information, it is determined whether an access request is initiated.
  • the urgency calculation criterion of the at least one access level is determined by at least one of a service type, a buffer status, a waiting time, a number of message retransmissions, and a generated data rate.
  • the urgency calculation criterion of the access level includes: when determined by the service type, obtaining an urgency of a service type according to a subset of a service type of the MTC device; or, when When deciding, the urgency of the cache state is obtained according to the ratio of the cache size used by the MTC device to the total cache length.
  • the urgency calculation criterion of the access level includes: when the waiting time of the MTC device is within the longest waiting time range specified by the system, then according to The ratio of the waiting time of the MTC device to the maximum waiting time specified by the system obtains the urgency of the waiting time; when the waiting time of the MTC device exceeds the maximum waiting time range specified by the system, the MTC device initiates an access request.
  • the urgency calculation criterion of the access level includes: when the number of retransmissions of the MTC device is less than or equal to the maximum weight specified by the system When the number of transmissions is exceeded, the urgency of the number of retransmissions of the packet is obtained according to the ratio of the retransmission coefficient of the MTC device to the maximum number of retransmissions of the packet specified by the system; when the number of retransmissions of the MTC device exceeds the maximum specified by the system When the number of retransmissions is repeated, the MTC device adjusts its access urgency to a minimum in order to initiate an access request.
  • the urgency calculation criterion of the access level includes: when the amount of data generated by the MTC device is less than or equal to a maximum generated data rate specified by the system, Then, according to the ratio of the rate at which the MTC device generates data to the maximum allowable data rate specified by the system, the urgency for generating the data rate is obtained; when the amount of data generated by the MTC device exceeds the maximum generated data rate specified by the system, the MTC device initiates the connection. Enter the request.
  • FIG. 3 is a schematic structural diagram of a congestion control apparatus for accessing a network of an MTC device according to an embodiment of the present invention. As shown in FIG. 3, the method includes:
  • the receiving control information unit 301 is configured to receive, by the MTC device, the urgency calculation criterion number of the at least one access level periodically broadcasted by the network side and the management information of the access urgency of the at least one access level;
  • an emergency calculation criterion unit 302 configured to: when preparing for access, the MTC device uses the received urgency calculation criterion number to search for a pre-stored corresponding emergency calculation criterion according to its own access level;
  • Obtaining the self-access urgency unit 303 configured to calculate, according to the corresponding urgency calculation criterion found by the MTC device, the self-access urgency within the access level;
  • the comparison judgment initiation request unit 304 is configured to compare the self-connection urgency with the allowed access urgency, and determine, according to the comparison result, whether the MTC device initiates an access request.
  • the comparison judgment initiation request unit 304 of the embodiment of the present invention is further configured to: when the self-access urgency is greater than the allowed access urgency, the MTC device initiates an access request.
  • urgency calculation criteria applicable to all access levels are first formulated, and these urgency calculation criteria are numbered.
  • All MTC devices in the network have a total of H access levels, in order, 1 and 2
  • the urgency calculation criterion in the network mainly involves the following parameters of the MTC device: service type S, buffer status ⁇ waiting time T, number of message retransmissions, and data rate R. Based on the weight of these characteristics, K different urgency calculation criteria for all access levels are developed, as follows:
  • the following describes the calculation method of the MTC device in the network mainly including the parameter service type S, the buffer status B, the waiting time T, the number of retransmissions of the packet, and the data rate R generated in conjunction with FIG. 4 to FIG.
  • the L s urgency portion is determined by the service type of the MTC device. For example, all service types included in the system application may be divided into different subsets of L s values ranging from 1 to 10, each subset. L s the type of service the same value, so that you can determine the value of L s, a detailed example of FIG. 4 where a subset of the service type MTC device.
  • the L B urgency portion is determined by the cache occupancy of the MTC device, and can be obtained according to the ratio of the cache size used by the MTC device to the total cache length, that is, A detailed example can be calculated by referring to the method shown in FIG.
  • the L T urgency part is determined by the waiting time of the MTC device.
  • the MTC device When the MTC device has access requirements, it will start its internal accumulated waiting time timer to start timing. After the access is successful, the timer value will be cleared.
  • the value of the L T part may be according to the waiting time of the MTC device, that is, the time from the access requirement to the time of calculating the urgency deadline.
  • the L N urgency part is determined by the number of retransmissions of the MTC device.
  • the MTC device fails to transmit, it needs to start its internal outgoing counter to start counting. After the transmission is successful, the counter will be cleared.
  • the ratio of the number of retransmissions of the MTC device to the maximum number of retransmissions of the packets specified by the system may be obtained.
  • the example is shown in Figure 7. If the number of retransmissions of the MTC device exceeds the maximum number of retransmissions allowed by the system, the transmission efficiency is too low, and the access urgency should be adjusted to the minimum. A large number of available resources are allowed to be accessed again for transmission.
  • the L R urgency portion is determined by the rate at which the MTC device generates data, and the MTC device internally counts the amount of data generated per unit time.
  • All MTC devices in the system need to pre-store the above urgency calculation criteria and their corresponding numbers, and determine their own access level according to their own type and business model.
  • FIG. 9 is a flowchart showing a method for controlling congestion of a large number of different types of MTC devices to access a network according to an embodiment of the present invention, as shown in FIG. 9, including the following steps:
  • Step S901 The network side of the system periodically broadcasts the control message of the MTC device, and the content thereof is composed of two parts, I and II.
  • the message I is the urgency calculation criterion number applicable to each access level in the current network.
  • the parameter k H in the figure indicates the urgency calculation criterion number currently applicable to the access level H.
  • the content of the message II is the allowable access urgency and the delay waiting time of each access level in the network.
  • the parameter L H in Figure 11 represents the minimum allowable access urgency currently applicable to the access level H
  • the parameter t H represents the delay waiting time currently applicable to the access level H.
  • the broadcast frequencies of the above message I and message II may be the same or different.
  • the broadcast frequency of the message I is low, and the current allowed access situation of the system needs to be updated in real time, so the broadcast frequency of the message II needs to be high.
  • the broadcast period of the message II is the same order of magnitude as the delay wait time in the message II broadcasted by the network side, and the broadcast period of the message I is several orders of magnitude of the delay wait time in the message II broadcast by the network side.
  • Step S902 The MTC device receives the message I and the message II broadcasted by the network side during operation, and updates and stores the two parts after the receiving is completed.
  • Step S903 When the MTC device has an access requirement, determine an applicable urgency calculation criterion according to the current access level and the content of the stored message I, and calculate its own access urgency according to the criterion.
  • Step S904 The MTC device checks according to its own access level and the stored content of the message II. Check whether the urgency is greater than the current allowed access urgency of the access level, if it is greater than step S905; otherwise, continue to step S906.
  • Step S905 The MTC device initiates an access request for access, and the process ends.
  • Step S906 The MTC device generates a random value in the zero and the delay waiting time according to the delay waiting time of the access level in the stored message II, and waits for the delay at the time of the random value; during the waiting period, the MTC The device can continue to receive the messages I and II broadcasted by the network side and update the storage; when the delay ends, the MTC device proceeds to step S903 and continues to proceed downward.
  • the embodiments of the present invention provide a method for effectively solving the problem that a large number of different types of MTC devices access the network to generate congestion in the network.
  • the method takes into account the actual operation of the network side and various actual conditions of the MTC device.
  • the main advantage is that the access requirement of a large number of MTC devices in the same access level is to calculate the urgency according to a certain criterion, instead of generating a random number. It is decided that this can avoid the situation where the MTC device with urgent needs loses the access opportunity due to the random number generated.
  • the method in the embodiment of the present invention can also perform unified management on the urgency of different MTC devices in the same access level, thereby improving the scalability of the system.
  • the urgency calculation criteria for different access levels can be adjusted according to the real-time status of the network, so as to improve the transmission effect of the network.
  • the MTC device when preparing to access the network, searches for the corresponding urgency calculation criterion stored in advance by using the urgency calculation criterion number broadcasted by the network side according to its own access level, and calculates the self-connection within the self-access level.
  • the urgency it is determined whether to initiate an access request according to the comparison result of the self-access urgency and the allowed access urgency. Therefore, the present invention
  • the embodiment can adjust the urgency calculation criterion of different access levels according to the real-time condition of the network, thereby improving the transmission effect of the network.

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

Abstract

L'invention concerne un procédé et un dispositif de gestion d'encombrement pour un réseau d'accès de dispositifs à communication de type machine (MTC), ayant trait au domaine des communications sans fil. Selon ledit procédé : un dispositif MTC reçoit des informations de gestion qui comprennent le numéro de série de critère de calcul d'au moins un niveau d'accès et le degré d'urgence d'autorisation d'accès d'au moins un niveau d'accès périodiquement radiodiffusé par un côté réseau; lorsqu'il se prépare à accéder, en fonction de son niveau d'accès, le dispositif MTC utilise le numéro de série de critère de calcul de degré d'urgence reçu afin de rechercher un critère de calcul de degré d'urgence correspondant pré-enregistré; le dispositif MTC calcule un degré d'urgence d'accès de celui-ci dans le niveau d'accès de celui-ci, en fonction du critère de calcul de degré d'urgence correspondant recherché; et le dispositif MTC compare le degré d'urgence d'accès de celui-ci au degré d'urgence d'autorisation d'accès, puis évalue si une requête d'accès doit être lancée en fonction du résultat de la comparaison. En fonction du statut en temps réel d'un réseau, la présente invention permet d'ajuster le critère de calcul de degré d'urgence de différents niveaux d'accès, améliorant ainsi l'effet de transmission du réseau.
PCT/CN2013/080483 2013-01-14 2013-07-31 Procédé et dispositif de gestion d'encombrement pour un réseau d'accès de dispositifs mtc WO2013167093A2 (fr)

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CN201310012926.8A CN103929776B (zh) 2013-01-14 2013-01-14 一种mtc设备接入网络的拥塞控制方法及装置
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CN106888511B (zh) * 2017-03-06 2020-05-12 成都信息工程大学 一种业务接入的控制方法、及业务接入的控制装置
CN108462999B (zh) * 2018-01-10 2021-10-26 海信集团有限公司 一种进行资源分配的方法和设备
CN109089281B (zh) * 2018-06-27 2022-02-18 海能达通信股份有限公司 一种集群通信方法、终端设备及存储介质
CN111464984B (zh) * 2020-03-31 2023-06-06 中国联合网络通信集团有限公司 一种通信方法及装置

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