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WO2012126247A1 - Procédé et système de commande de ressources sans fil - Google Patents

Procédé et système de commande de ressources sans fil Download PDF

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Publication number
WO2012126247A1
WO2012126247A1 PCT/CN2011/081864 CN2011081864W WO2012126247A1 WO 2012126247 A1 WO2012126247 A1 WO 2012126247A1 CN 2011081864 W CN2011081864 W CN 2011081864W WO 2012126247 A1 WO2012126247 A1 WO 2012126247A1
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WO
WIPO (PCT)
Prior art keywords
base station
terminal
terminals
radio resource
attribute
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PCT/CN2011/081864
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English (en)
Chinese (zh)
Inventor
邓云
戴谦
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ZTE Corp
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ZTE Corp
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Publication of WO2012126247A1 publication Critical patent/WO2012126247A1/fr
Anticipated expiration legal-status Critical
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/52—Allocation or scheduling criteria for wireless resources based on load

Definitions

  • the present invention relates to a wireless communication technology, and more particularly to a wireless resource control method and system. Background technique
  • M2M Machine to Machine
  • M2M applications include industrial applications, home applications, personal applications, etc.
  • industry applications include traffic monitoring, alarm systems, marine rescue, vending machines, car payment, etc.
  • Home applications include automatic meter reading, temperature control, etc.
  • Applications include life testing, remote diagnosis, and more.
  • M2M objects are machine-to-machine, person-to-machine, and data communication between one or more machines is defined as Machine Type Communication (MTC), in which case human interaction is less required.
  • MTC Machine Type Communication
  • MTC Device MTC Device
  • MTC terminal MTC terminal.
  • PLMN Public Land Mobile-Communication Network
  • MTC devices are numerous, the amount of data transmitted each time is small, the transmission interval is large, and some MTC devices are relatively fixed in position. According to statistics, there will be 3,000 MTC devices installed in a certain urban area. If so many MTC devices initiate random access, such as fires, earthquakes, etc., they will bring alarms to the network. Great impact. Generally, multiple base stations are connected to the same core network element, such as a Mobility Management Entity (MME). When many MTC devices in all base stations need to access the network, for example, after power off, the power is restored. All MTC devices need to be registered in the network, which will cause the MME to bear huge signaling impact and may even cause overload.
  • MME Mobility Management Entity
  • the radio resource can be represented by a Physical Resource Block (PRB) protocol.
  • PRB Physical Resource Block
  • the continuous w s u single carrier frequency division multiple access ( SC-FDMA ) symbols in the time domain and the consecutive subcarriers in the frequency domain are defined as one PRB (upstream), where is an SC slot included in an uplink time slot.
  • the number of FDMA symbols which is the resource block size in the frequency domain.
  • the protocol defines the downlink physical resource block, and the continuous orthogonal frequency division in the time domain
  • the (OFDM) symbol and the w consecutive frequency domain subcarriers are defined as one physical resource block (downlink), where is the number of OFDM symbols included in one downlink slot, and ⁇ is the resource block size in the frequency domain.
  • the downlink resource of the entire cell may be represented by a subcarrier of ⁇ , where the value is determined by the downlink transmission bandwidth configured in the cell, and the ⁇ supported by the protocol is also between 6 and 110.
  • the base station needs to perform some measurements to dynamically implement access control according to the change of the load, and the measurement of the existing base station includes the use of the PRB, the number of activated terminals, and the total throughput of the terminal, among them, PRB
  • the use includes the total physical resource blocks used (Tota l PRB usage), the physical resource blocks used by each service level (PRB usage per traff ic c las s ), and the physical resource blocks used by the signaling radio bearers (PRB usage for SRB), the physical resource blocks used by the common control channel include DL PRB usage for Common Control Channels (UL PRB usage for Common Cont rol Channels).
  • duration T this period of time
  • ⁇ ( ⁇ ) refers to the sum of all physical resource blocks used for transmission in the uplink and downlink, and refers to the total physical resource block in the duration ⁇ ; the physical resource block used in each service level is defined as M(q C f)
  • M C , r refers to the total physical resource block used for each service level in duration T, and refers to the total physical resource block within the duration ⁇ .
  • each service level is divided according to the service quality level identifier (QCI, QoS C las s Ident if ier ), and the QCI is used to specify the control bearer level packet forwarding manner defined in the access node (such as scheduling weight, admission threshold, queue). Management threshold, chain Layer protocol configuration, etc.);
  • the physical resource blocks used by the signaling radio bearers and the physical resource blocks used by the common control channel are similar to the above two definitions, and are not described here.
  • the measurement of the existing base station is directed to all the terminals, and the base station cannot know the status of the use of the wireless resources by the H2H device, and thus cannot effectively prevent the occurrence of a situation in which the machine type device occupies a large amount of wireless resources. In this way, if the number of machine-type devices accessing the network is large, it may hinder the access of ordinary users, which seriously affects the access experience of ordinary users. Summary of the invention
  • the main purpose of the embodiments of the present invention is to provide a radio resource control method and system, which can effectively prevent a device-type device from occupying a large amount of radio resources, thereby avoiding a shortage of physical resource blocks available to ordinary users.
  • a radio resource control method where a base station separately measures radio resource usage for different attribute terminals, and further includes:
  • the base station controls the corresponding attribute terminal according to the measured usage of the radio resource.
  • the base station controls according to the measured radio resource usage status: access control, and/or load balancing control, and/or scheduling.
  • the method further includes: the base station separately setting threshold values of physical resource blocks used by terminals of different attributes in advance;
  • the access control performed by the base station according to the measured radio resource usage includes: if the total physical resource block used by the terminal belonging to the attribute reaches or exceeds the threshold, the base station rejects the terminal belonging to the attribute. Accessing the network; or, the base station releases some or all of the terminals of the attribute.
  • the method further includes: the base station separately setting the physics used by the terminal of different attributes in advance The threshold of the resource block;
  • the base station performs load balancing control according to the measured radio resource usage situation, where the base station sends the total physical resource block information used by the different attribute terminals measured by the base station to other base stations, and when other base stations select the target cell for the terminal, And selecting, according to the received radio resource usage status of the attribute terminal to which the terminal belongs and the threshold value, a target cell that can satisfy the terminal service requirement for the attribute terminal.
  • the method further includes: the base station separately setting threshold values of physical resource blocks used by terminals of different attributes in advance;
  • the scheduling performed by the base station according to the measured radio resource usage includes:
  • the base station determines that the total physical resource block used by the terminal of a certain attribute exceeds the threshold value, the scheduling of the attribute terminal is reduced.
  • the base station learns the attributes of the terminal by reporting the terminal.
  • the different attribute terminals are different types of terminals.
  • roaming terminals and/or non-roaming terminals
  • a radio resource control system includes at least a base station, and a terminal, where
  • the terminal is configured to implement communication by accessing the network through the base station;
  • the base station is configured to separately measure radio resource usage for different attribute terminals; and control the corresponding attribute terminal according to the measured radio resource usage.
  • the base station is specifically configured to: separately measure radio resource usage conditions for different attribute terminals; perform control according to the measured radio resource usage status: access control, and/or load balancing control System, and / or scheduling.
  • the base station is one or more; the terminal is one or more;
  • the terminal includes a machine type communication MTC device, and/or a person-to-person H2H device.
  • the base station separately measures radio resource usage for different QoS terminals, and the base station controls the corresponding Attribute terminal according to the measured radio resource usage.
  • the base station dynamically controls the access of the different attribute terminals, and/or load balancing control, and/or scheduling by monitoring the usage of the radio resources of the different attribute terminals in real time, such as the total physical resource blocks used.
  • FIG. 1 is a flowchart of a method for controlling a radio resource according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a structure of a radio resource control system according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a first embodiment of a radio resource control method according to the present invention.
  • FIG. 4 is a schematic flowchart of a third embodiment of a radio resource control method according to the present invention.
  • FIG. 1 is a flowchart of a method for controlling a radio resource according to an embodiment of the present invention. As shown in FIG. 1, the method includes the following steps:
  • Step 100 The base station separately measures radio resource usage for different attribute terminals.
  • Different attribute terminals refer to different types of terminals, including MTC devices, and/or H2H devices; or, different attribute terminals refer to terminals that initiate delay service, and/or terminals that do not allow delay services; Or, different attribute terminals refer to terminals that initiate different priority services;
  • different attribute terminals refer to terminals of different priorities
  • different attribute terminals refer to roaming terminals, and/or non-roaming terminals
  • different attribute terminals refer to terminals belonging to different groups.
  • the base station learns the attributes of the terminal through the reporting of the terminal, for example, when the terminal accesses the access request, or when the connection establishment is completed, the signaling is reported to the base station through the connection completion signaling.
  • Step 101 The base station controls the corresponding attribute terminal according to the measured usage of the radio resource. These may include access control, and/or load balancing control, and/or scheduling, and the like.
  • the base station performs access control according to the measured radio resource usage, including: the base station separately sets threshold values of physical resource blocks used by terminals of different attributes, respectively, if the total physical used by the terminal belonging to a certain attribute If the resource block meets or exceeds the set threshold, the base station rejects the terminal accessing the network belonging to the attribute, or the base station releases part or all of the terminal of the attribute (the specific implementation may be performed according to a preset policy, such as a base station.
  • the base station performs load balancing control according to the measured radio resource usage, including: the base station separately sets the threshold value of the physical resource block used by the different attribute terminals, and the base station sends the self-measured different attribute terminal to the other base station.
  • the total physical resource block information when the other base station selects the target cell for the terminal, according to the received wireless resource usage status of the terminal to which the terminal belongs and the threshold value, the terminal can select the service demand of the terminal for the attribute terminal. Target cell.
  • the scheduling performed by the base station according to the measured radio resource usage includes: the base station separately sets the threshold value of the physical resource block used by the terminal of different attributes, and the base station determines that the total physical resource block used by the terminal of a certain attribute exceeds Threshold, then press the strategy set earlier (For example, reducing the physical resource blocks used by the attribute terminal, including uplink and downlink, etc.) reduces the scheduling of the attribute terminal.
  • the base station dynamically controls the access of different attribute terminals, and/or load balancing control by monitoring the usage of radio resources of different attribute terminals in real time, such as the total physical resource blocks used. / / Scheduling, at the same time, avoiding the problem that other terminals can not access the network smoothly due to the large amount of radio resources occupied by some terminals when accessing the network, so that the business can be smoothly carried out, in particular, effectively preventing the machine-type equipment from occupying a large amount of The situation of the wireless resources, thereby avoiding the shortage of physical resource blocks available to ordinary users, ensuring the transmission efficiency of ordinary users accessing the network, thereby improving the network load control capability.
  • FIG. 2 is a schematic structural diagram of a radio resource control system according to an embodiment of the present invention. As shown in FIG. 2, the system includes at least a base station, and a terminal, where
  • the base station is configured to separately measure radio resource usage for different attribute terminals; and control the corresponding attribute terminal according to the measured radio resource usage.
  • the terminal is configured to implement communication by accessing the network through the base station.
  • the base station is one or more,
  • the base station is specifically configured to perform access control according to the measured radio resource usage situation; and/or, the base station is specifically configured to send, to other base stations, the total physical resource block information used by the different attribute terminals measured by itself. And the other base station is configured to, when selecting the target cell for the terminal, select a target cell that can satisfy the terminal service requirement for the attribute terminal according to the received radio resource usage status of the attribute terminal to which the terminal belongs.
  • the base station is specifically configured to perform scheduling according to the measured radio resource usage.
  • First embodiment 3 is a schematic flowchart of a first embodiment of a radio resource control method according to the present invention.
  • different attribute terminals such as an MTC device and an H2H device
  • the network is connected.
  • the base station 1 needs to measure the usage of radio resources in real time.
  • the usage of the PRB includes the total physical resource block (Total PRB usage) used and the physical resource block used by each service level (PRB).
  • the physical resource block used by the signaling radio PRB usage for SRB
  • the physical resource block used by the common control channel include uplink and downlink (DL PRB usage for Common Control Channels, UL PRB usage for Common Control Channels) ). As shown in FIG. 3, the following steps are specifically included:
  • Step 300 Base station 1 sets the total PRB threshold used by the MTC.
  • the base station 1 prevents the MTC device from using too many radio resources, causing the H2H device to access the network, and cannot perform large bandwidth services.
  • the base station 1 pre-sets the total PRB gate used by the MTC device. Limit, such as a 20% threshold (based on total usage)
  • PRB * 100 is a percentage value, so the threshold is a hundred i ratio).
  • the base station may also set a corresponding threshold for the H2H device; or, set the respective threshold values for the MTC device and the H2H device.
  • Step 301 The base station 1 receives an access request of the terminal, and learns the attribute of the terminal.
  • the terminal In order to implement resource scheduling, access control, and the like of the base station 1, when the terminal accesses the network (in this embodiment, it refers to access through the cell 1), the terminal needs to report its attributes. For example, the terminal may establish a radio resource connection (RRC) connection request.
  • RRC radio resource connection
  • the attribute indicates in the Reason Cause field, and the attribute information may also be carried in the RRC connection setup complete signaling.
  • the MTC device sets its attribute to the MTC device in the establishment cause of the RRC connection request.
  • Step 302 The base station 1 determines whether the MTC device currently required to access is allowed to access, if The request for access to the MTC device is requested, and then proceeds to step 303; otherwise, step 304 is performed.
  • Step 303 The base station 1 accepts the access request of the current MTC device, and measures the total PRB used by the MTC device. If the MTC device has already accessed the cell 1 before, the part of the MTC device has used part of the PRB, and the base station 1 needs to measure these. The total PRB used by the MTC device, and then the PRB used by the MTC device that is allowed to access this time, obtains the total PRB used by the MTC devices in the connected state in all cells 1. End this process.
  • Step 304 The base station 1 rejects the MTC device currently requested to access.
  • the base station 1 finds that the total PRB used by the MTC device exceeds a predetermined threshold at this time, some or all of the MTC devices in the connected state may be released to free up sufficient resources to ensure the use of the H2H device.
  • the method further includes: the base station 1 subtracting the PRB used by the part of the MTC device, and obtaining the total used by the updated MTC device. The PRB is then used as a basis for judging whether the new MTC device can access the network.
  • the base station 1 may also separately measure the PRB used by each service level according to each service level established by the MTC device, and the total PRB threshold value used by the base station 1 through different preset service levels, and According to the threshold, it is determined whether a new MTC device is allowed to access the network.
  • the base station 1 provides sufficient wireless resources for the H2H device, which avoids the problem of large access delay and low transmission efficiency of the H2H device.
  • the MTC device and the H2H device access the network through the cell 2 under the base station 2 and are in a connected state.
  • the base station 2 needs to measure the usage of the radio resources in real time.
  • the usage of the PRB includes the total physical resource block (Total PRB usage) used and the physical resource block used by each service level (PRB). Usage per Traffic class ) and so on.
  • both the MTC device and the H2H device can initiate a delay tolerant service (or a service called delay tolerance), or a low priority service, corresponding to the MTC.
  • the device and the H2H device can also initiate a service that does not allow delay, or a service with normal priority, such as a signaling call initiated by the terminal (mo-Signaling) or a data call initiated by the terminal (in the existing protocol) ( mo-Data) business.
  • a service with normal priority such as a signaling call initiated by the terminal (mo-Signaling) or a data call initiated by the terminal (in the existing protocol) ( mo-Data) business.
  • high priority access high Priority Access
  • H2H devices can initiate high-priority services and emergency services.
  • Emergency service is the highest priority service, which means that the terminal communicates with local emergency communication receiving centers such as police, fire, medical care and so on.
  • the radio resource control method in this implementation includes:
  • the base station 2 measures the total PRB used by the terminal that initiates the allowed delay service, and the total PRB used by the terminal that initiates the service that does not allow the delay service;
  • the base station 2 compares whether the PRB actually used by the terminal that initiates the allowed delay service reaches a preset threshold, and if so, the base station 2 rejects the allowed delay service initiated by the new terminal, or the selected part of the base station 2 has initiated the allowable delay.
  • the MTC device or the H2H device of the service releases the RRC connection of the part of the terminal, so as to effectively control the amount of resources used by the service terminal that allows the delay to be extended.
  • the scheduling of the terminals may be further reduced, so that the terminal that initiates the allowed delay service uses the physical resource block in time.
  • the base station 2 measures the PRBs used by different priority services, and the base station 2 simultaneously sets the PRB thresholds that can be used by different priority services. When a PRB of a certain priority service is used, When the threshold is set, the base station 2 rejects the establishment request of the priority service, or releases the terminal that has initiated the priority service; or
  • the base station 2 measures the total PRBs used by the terminals of different priorities, and the base station 2 sets the PRB thresholds that can be used by the terminals of different priorities. When the PRB used by the terminal of a certain priority reaches the threshold, the base station 2 The terminal that refuses the priority accesses the network, or releases some of the accessed terminals of the priority. It should be noted that the terminal stores its own priority information (including low-priority terminals, normal-priority terminals, and high-priority terminals), and needs to pass its own priority through RRC signaling when initiating a service request. Sending to the base station 2, the base station 1 measures all the physical resource blocks used by the priority terminal according to the information; or
  • the base station 2 measures the total PRBs used by the terminals of different groups, and the base station 2 sets the PRB thresholds that can be used by different groups at the same time. When the PRB used by a certain group reaches the threshold, the base station 2 rejects the membership.
  • the terminals of the group access the network, or release some or all of the terminals that have belonged to the group. It should be noted that different terminals may belong to different groups, and may belong to the same group. Each group has its own group name identifier.
  • the base station 2 obtains the group name of the member by sending the RRC signaling through the terminal, or
  • the core network is informed of the group name to which it belongs (specifically, the group name of the member network is known through the core network, when the core network authenticates the accessed terminal, the group name of the member is known, and then the core network informs the base station that the terminal belongs to the terminal.
  • Group name which in turn can measure the PRB used by different groups; or
  • the base station 2 measures the total PRB used by the roaming terminal and the total PRB used by the non-roaming terminal, and the base station 2 simultaneously sets the PRB threshold that the roaming terminal can use, and the PRB used by the roaming terminal reaches the set threshold. At the time of the value, the base station 2 rejects the access request of the roaming terminal, or releases some or all of the already roaming terminals.
  • the local public land mobile network (HPLMN) network identifier is stored in the USIM (Universal Subscriber Identity Module) of the terminal, or an equivalent local public land mobile network (EHPLMN, Equivalent Home PLMN ) logo, the terminal can be current
  • the system message of the access cell learns the PLMN identity of the network to which the cell belongs, and further determines whether it is a roaming terminal: if the terminal currently accessing the network is not an HPLMN, it indicates that the terminal is a roaming terminal; or if the current network is neither HPLMN , or EHPLMN, indicates that the terminal is a roaming terminal.
  • the terminal can report to the base station 2 whether it belongs to the roaming terminal through RRC signaling.
  • the base station 2 can measure the total PRB used by the roaming terminal and measure the total PRB used by the non-roaming terminal according to the obtained information.
  • FIG. 4 is a schematic flowchart of a third embodiment of a radio resource control method according to the present invention.
  • base station 3 and base station 4 are neighboring base stations, and an X2 interface exists between them.
  • the cell 3 under the control of the base station 3 and the cell 4 under the base station 4 are mutually adjacent cells.
  • Different H2H devices and different MTC devices access cell 3 and cell 4, respectively.
  • the base station 3 and the base station 4 respectively measure the total PRBs used by different types of terminals in the respective jurisdictions. Since the terminals move, in order to ensure that the terminals can smoothly handover to adjacent cells, according to the method of the present invention, the base stations can advance in advance.
  • the radio resource usage information is exchanged so that the source base station can select a handover target cell with sufficient resources.
  • the specific includes:
  • Step 400 The base station 3 sends a resource status request (Resource Status Request) to the base station 4.
  • the resource status request carries a report characteristic (Report Characteristics), such as requesting to report the usage status of the PRB, or requesting to report the usage status of the PRB of different types of terminals; and further including the reporting period and the request report. Cell identification, etc.
  • Step 401 After receiving the resource status request, the base station 4 returns a resource status response (Resource Status Response) to the base station 3, and notifies the base station 3 that the base station 4 will perform the corresponding measurement, and reports the usage status of the PRB to the base station 3.
  • Resource Status Response Resource Status Response
  • Step 402 The base station 4 sends a resource status update (Resource Status Update) signaling to the base station 3, where the resource status update signaling includes the total used by different types of terminals in the cell 4.
  • the PRB that is, the total physical resource block used by the MTC device and the total used by the H2H device
  • step 403 The base station 3 performs the selection of the target cell according to the received resource status update. For example, a certain MTC device in the cell 3 of the base station 3 needs to be switched, and the base station 3 selects a target cell according to the measurement report reported by the MTC device. It is assumed that the candidate target cell in this embodiment includes the cell 4 (belonging to the base station 4). The cell 3 does not select the cell 4 as the target cell.
  • the base station 3 can select the cell 4 as the target cell for handover.
  • the base station 3 may request the base station 4 to send the status information of the PRB used by the roaming terminal and the non-roaming terminal. After the base station 3 obtains the information, when the terminal needs to switch, The suitable target cell can be selected according to the roaming feature of the terminal; or
  • the base station 3 may request the base station 4 to send the PRB state information used by the terminal that initiates the service of the allowed delay. After the base station 3 obtains the information, the base station 3 may select a suitable target cell for the terminal when the terminal that initiates the allowable delay service needs to be handed over;
  • the base station 3 may request the base station 4 to send the PRB status information used by the terminal that initiates the different priority services. After obtaining the information, the base station 3 may select a suitable target cell for the terminal that initiates the different priority services.
  • the PRB information used by the neighboring base stations to interact with different types of terminals is implemented, or the physical resource block information used by the roaming terminal is implemented, or whether the interactive initiation is allowed to allow the delay service terminal Physical resource block information used, or physical resource block information used by different priority service terminals to be initiated by interaction; and the base station is corresponding
  • the target cell that meets the service requirement can be selected, and the RRC connection release caused by the failure of the handover process is avoided.
  • the neighboring base stations interact with the PRB information used by the MTC device, it indicates that the base station needs to properly control the machine type terminal, thereby avoiding that the machine type terminal occupies a large amount of radio resources, and the ordinary user cannot successfully access the network, and cannot obtain satisfactory.
  • the problem with wireless services when the neighboring base stations interact with the PRB information used by the MTC device, it indicates that the base station needs to properly control the machine type terminal, thereby avoiding that the machine type terminal occupies a large amount of radio resources, and the ordinary user cannot successfully access the network, and cannot obtain satisfactory.

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

Abstract

La présente invention concerne un procédé permettant de commander des ressources sans fil. Une utilisation de ressources sans fil est mesurée par une station de base respectivement pour des terminaux ayant différents attributs. Le terminal ayant l'attribut correspondant est commandé par la station de base sur la base de l'utilisation mesurée de ressources sans fil. Dans des modes de réalisation de la présente invention, par la surveillance de l'utilisation de ressources sans fil des terminaux ayant différents attributs, tels que le bloc total de ressources physiques utilisé, la station de base réalise une commande, de manière dynamique, pour les terminaux ayant différents attributs l'accès et/ou la commande d'équilibre de charge et/ou leur programmation temporelle. La présente invention concerne en outre un système correspondant destiné à commander les ressources sans fil. La présente invention évite le problème selon lequel une grande quantité de ressources sans fil sont occupées par des terminaux accédant au réseau, avec la conséquence que l'accès au réseau soit refusé à d'autres terminaux, et empêche efficacement le scénario qu'une grande quantité de ressources sans fil soient occupées par des dispositifs de type machine, assurant ainsi l'efficacité des transmissions pour des utilisateurs réguliers accédant au réseau, et améliorant la capacité de commande de charge du réseau.
PCT/CN2011/081864 2011-03-24 2011-11-07 Procédé et système de commande de ressources sans fil Ceased WO2012126247A1 (fr)

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CN201110072665XA CN102695211A (zh) 2011-03-24 2011-03-24 一种无线资源控制方法及系统

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