WO2014180190A1 - 一种选择可用接入网络的方法及用户设备 - Google Patents

一种选择可用接入网络的方法及用户设备 Download PDF

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Publication number
WO2014180190A1
WO2014180190A1 PCT/CN2014/073955 CN2014073955W WO2014180190A1 WO 2014180190 A1 WO2014180190 A1 WO 2014180190A1 CN 2014073955 W CN2014073955 W CN 2014073955W WO 2014180190 A1 WO2014180190 A1 WO 2014180190A1
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WIPO (PCT)
Prior art keywords
access network
wlan access
user equipment
network
wlan
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PCT/CN2014/073955
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English (en)
French (fr)
Inventor
姚君
戴谦
崔云鹏
陆婷
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to US14/889,938 priority Critical patent/US10582448B2/en
Priority to JP2016512201A priority patent/JP2016518084A/ja
Priority to EP14794016.7A priority patent/EP2996403B1/en
Publication of WO2014180190A1 publication Critical patent/WO2014180190A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/20Selecting an access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/10Scheduling measurement reports ; Arrangements for measurement reports
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/18Selecting a network or a communication service
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10Small scale networks; Flat hierarchical networks
    • H04W84/12WLAN [Wireless Local Area Networks]

Definitions

  • the present invention relates to the field of communications, and in particular, to a method for selecting an available access network and a user equipment. Background technique
  • LTE Long Term Evolution
  • LTE Advanced enhanced LTE
  • the wireless local area network As is well known, in addition to the wireless network technology provided by The 3rd Generation Partnership Proc ect (3GPP), the wireless local area network (WLAN) is currently widely used, especially Wireless LAN based on the IEEE802.il standard has been widely used in hotspot access coverage in homes, enterprises and even the Internet. Among them, the technical specifications proposed by the WIFI Alliance (Wi-Fi Alliance) are the most widely used. Therefore, in practice, the WIFI network is often equated with the WLAN network based on the IEEE 802.11 standard, and the following texts are used without causing confusion.
  • the WIFI module is used to describe the WLAN-enabled wireless transceiver and processing module in the network node.
  • 3GPP Interworking WLAN architecture allows the WLAN network to use the Authentication Authorization Accounting (AAA) in the 3GPP access network for unified authentication and authorization, and can also reuse the packet data network gateway in the relevant 3GPP access network.
  • AAA Authentication Authorization Accounting
  • the current Interworking is triggered by the UE, and the 3GPP network side has no control over the target access network, although the network element access network on the core network side finds support functions ( Access Network Discovery Support Function (ANDSF) Although some policy rules are given, these rules are relatively static.
  • the 3GPP network side loses control over the UE's choice of access network. This may result in the UE's selected access network not being able to.
  • the QoS (Quality of Service) requirements of the UE are met, or the UE frequently switches between the 3GPP access network and the WLAN access network, which affects the user experience and increases unnecessary network load.
  • the embodiments of the present invention provide a method for selecting an available access network and a user equipment, so as to solve the problem that the UE frequently selects between the 3GPP access network and the WLAN access network in the related technology.
  • An embodiment of the present invention provides a method for selecting an available access network, including:
  • the user equipment monitors that the state of the WLAN access network continues to meet the predetermined threshold for a predetermined time and/or reaches a predetermined number of times, or monitors that the state of the WLAN access network within a predetermined time or a predetermined number of times is filtered and then satisfies the predetermined condition.
  • the threshold is reached, the wireless local area network access network is determined to be an available access network.
  • the above method has the following features:
  • the user equipment monitors that the state of the WLAN access network continues to meet the predetermined threshold for a predetermined time and/or reaches a predetermined number of times, including:
  • the user equipment monitors that the states of the one or more wireless local area network access networks are continuously satisfied, or the states of the plurality of wireless local area network access networks are continuously satisfied after being weighted, or any one of multiple states
  • the predetermined threshold is continuously met for a predetermined time and/or a predetermined number of times.
  • the foregoing method further has the following feature: the user equipment detects that the state of the WLAN access network in a predetermined time or a predetermined number of times meets a predetermined threshold after filtering, and the method includes: The average value of the plurality of time periods of the state of the wireless local area network access network after the predetermined time is subjected to the weighting process and the predetermined threshold is met;
  • the user equipment detects that the state of the WLAN access network meets a predetermined threshold after weighting the average value of the predetermined predetermined number of time periods;
  • the user equipment monitors that the status of the WLAN access network for a predetermined predetermined number of times satisfies a predetermined threshold after weighting processing.
  • the above method has the following features:
  • the user equipment detects that the state of the WLAN access network in a predetermined time or a predetermined number of times meets a predetermined threshold after filtering, and includes:
  • the user equipment monitors that the states of the multiple WLAN access networks in a predetermined time or a predetermined number of times satisfy a predetermined threshold after filtering, or after filtering, and then perform a weighting process to satisfy a predetermined threshold, or multiple states. Any one of them is filtered to satisfy a predetermined threshold.
  • the status of the WLAN access network includes one or more of the following:
  • the ratio of the received signal strength of the WLAN access network to the transmitted signal strength of the WLAN access point is the ratio of the received signal strength of the WLAN access network to the transmitted signal strength of the WLAN access point
  • the signal to interference and noise ratio of the signal of the wireless local area network access network is the signal to interference and noise ratio of the signal of the wireless local area network access network
  • the access network load of the WLAN access network is the access network load of the WLAN access network
  • the uplink load of the WLAN access network connected to the WAN The uplink load of the WLAN access network connected to the WAN.
  • the WLAN access network is connected to the link download of the WAN.
  • the above method has the following features:
  • the wireless local area network by measuring a beacon frame or measuring a pilot frame, or by sending a beacon request or a link measurement report after sending a beacon request or a link measurement request to the wireless local area network station.
  • Signal strength of the access network The user equipment obtains the received signal strength of the WLAN access network and the transmitted signal strength of the WLAN access point by monitoring the beacon frame or the probe response frame and the signal strength of the WLAN access network that has been learned.
  • the user equipment obtains a reply link measurement report by measuring a beacon frame or a measurement pilot frame, or by transmitting a link measurement request to the wireless local area network station, or by sending a noise histogram request to the wireless local area network station
  • the noise histogram obtained after the response is compared with the signal strength of the wireless local area network access network that has been obtained, and the signal to interference and noise ratio of the signal of the wireless local area network access network is obtained;
  • the access network load of the WLAN access network by monitoring a beacon frame or a probe response frame, or by transmitting a channel load request after sending a channel load request to the WLAN station.
  • the user equipment obtains a link uplink load of the WLAN access network connected to the WAN and a link downlink load of the WLAN access network connected to the WAN by monitoring a beacon frame or a probe response frame.
  • the above method has the following features:
  • the predetermined threshold is configured by the network side through broadcast or paging or dedicated signaling, or is set by the user equipment according to the protocol.
  • the above method has the following features:
  • the predetermined time is configured by the network side through broadcast or paging or dedicated signaling, or is set by the user equipment according to the protocol.
  • the above method has the following features:
  • the predetermined number of times is configured by the network side by broadcast or paging or dedicated signaling, or by the user equipment according to the protocol.
  • the above method has the following features:
  • the filtering coefficient of the filtering process is configured by the network side through broadcast or paging or dedicated signaling, or is set by the user equipment according to the protocol.
  • the weighting coefficient of the weighting process is configured by the network side through broadcast or paging or dedicated signaling, or is set by the user equipment according to the protocol.
  • the embodiment of the invention further provides a user equipment, including:
  • a monitoring module configured to monitor whether a state of the wireless local area network access network continues to meet a predetermined threshold for a predetermined time and/or to reach a predetermined number of times, or monitor a state of the wireless local area network access network for a predetermined time or a predetermined number of times to be filtered Whether the predetermined threshold is met afterwards;
  • a decision module is configured to determine that the wireless local area network access network is an available access network if the monitoring module detects that a predetermined condition is met.
  • the foregoing user equipment further has the following features:
  • the monitoring module monitors whether the state of the wireless local area network access network continues to meet a predetermined threshold for a predetermined time and/or reaches a predetermined number of times by: monitoring whether states of the one or more wireless local area network access networks continue respectively Whether the predetermined threshold is reached for a predetermined time and/or a predetermined number of times, or whether the state of the plurality of WLAN access networks continues to satisfy the predetermined threshold for a predetermined time and/or reaches a predetermined number of times, or a plurality of states after the weighting process Whether the predetermined threshold is continuously met for a predetermined time and/or reaches a predetermined number of times.
  • the foregoing user equipment further has the following features:
  • the monitoring module monitors whether the state of the wireless local area network access network after a predetermined time or a predetermined number of times passes the predetermined threshold after filtering: monitoring the state of the wireless local area network access network for a predetermined time Whether the average of the time periods has been subjected to the weighting process to satisfy the predetermined threshold; or monitoring whether the state of the wireless local area network access network satisfies the predetermined threshold after the average of the predetermined predetermined number of time periods has been weighted; or monitoring the continuous reservation The number of times of the state of the WLAN access network is subjected to a weighting process to satisfy a predetermined threshold.
  • the foregoing user equipment further has the following features:
  • the monitoring module monitors a state of the wireless local area network access network within a predetermined time or a predetermined number of times after filtering, and satisfies a predetermined threshold by monitoring: a plurality of wireless local area network access networks monitored for a predetermined time or a predetermined number of times Whether the state satisfies the predetermined threshold after the filtering process, or whether the predetermined threshold is satisfied after being weighted after being filtered, or whether any of the plurality of states is subjected to the filtering process to satisfy the predetermined threshold.
  • the foregoing user equipment further has the following features:
  • the status of the WLAN access network monitored by the monitoring module includes one or more of the following:
  • the ratio of the received signal strength of the WLAN access network to the transmitted signal strength of the WLAN access point is the ratio of the received signal strength of the WLAN access network to the transmitted signal strength of the WLAN access point
  • the signal to interference and noise ratio of the signal of the wireless local area network access network is the signal to interference and noise ratio of the signal of the wireless local area network access network
  • the access network load of the WLAN access network is the access network load of the WLAN access network
  • the uplink load of the WLAN access network connected to the WAN The uplink load of the WLAN access network connected to the WAN.
  • the WLAN access network is connected to the link download of the WAN.
  • the foregoing user equipment further has the following features:
  • the monitoring module monitors the status of the WLAN access network by one or more of the following:
  • Measuring a beacon frame or measuring a pilot frame, or transmitting a link measurement report after receiving a link measurement request to the wireless local area network station, or obtaining a reply noise by transmitting a noise histogram request to the wireless local area network station The histogram report and the signal strength of the wireless local area network access network that have been learned to obtain a signal to interference and noise ratio of the signal of the wireless local area network access network;
  • the monitoring beacon frame or probe response frame obtains a link uplink load of the WLAN access network connected to the wide area network and a link downlink load of the WLAN access network connected to the wide area network.
  • the foregoing user equipment further has the following features:
  • the user equipment further includes
  • a configuration module configured to accept, by the network side, by broadcast or paging or dedicated signaling configuration, or set the predetermined threshold, the predetermined time, the predetermined number of times, the filter coefficient of the filtering process, and the The weighting coefficient of the weighting process.
  • the embodiments of the present invention provide a method for selecting an available access network and a user equipment, which can ensure that the UE selects a stable WLAN access network and reduces the risk of ping-pong selection.
  • FIG. 1 is a schematic diagram of an architecture of a network interworking protocol according to the related art
  • FIG. 2 is a flowchart of a method for selecting an available access network according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of Embodiment 1 of the present invention
  • Embodiment 2 of the present invention is a schematic flow chart of Embodiment 2 of the present invention.
  • Embodiment 3 of the present invention is a schematic flow chart of Embodiment 3 of the present invention.
  • FIG. 6 is a schematic diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 2 is a flowchart of a method for selecting an available access network according to an embodiment of the present invention. As shown in FIG. 2, the method in this embodiment includes the following steps:
  • the UE acquires a state of one or more WLAN access networks.
  • the UE monitors that the state of the WLAN access network continues to meet the predetermined threshold when the predetermined threshold is reached.
  • the WLAN access network is determined to be an available access network when and/or after a predetermined number of times is reached, or when the state of the WLAN access network that is monitored for a predetermined time or a predetermined number of times is filtered and processed to meet a predetermined threshold.
  • the UE acquires the status of multiple WLAN access networks, and the UE continuously monitors or continues to satisfy the status of the one or more WLAN access networks. If any one of them continues to satisfy the predetermined threshold for a predetermined time and/or reaches a predetermined number of times, it is determined that the WLAN access network is an available access network.
  • the UE monitors that the average value of the plurality of time periods of the WLAN access network in a predetermined time period is subjected to weighting processing to meet a predetermined threshold, or the user equipment detects the wireless The state of the local area network access network meets the predetermined threshold after the average of the predetermined number of time periods has been subjected to the weighting process, or the state of the WLAN access network monitored by the user equipment for a predetermined predetermined number of times is weighted and satisfies the predetermined condition.
  • the threshold determines that the WLAN access network is an available access network.
  • the UE acquires the status of the multiple WLAN access networks.
  • the UE detects that the status of the multiple WLAN access networks within a predetermined time or a predetermined number of times is filtered, respectively, the UE meets or passes. After the filtering is performed and the weighting process is satisfied or any one of the plurality of states meets the predetermined threshold, the WLAN access network is determined to be an available access network.
  • the status of the WLAN access network includes one or more of the following:
  • the ratio of the received signal strength of the WLAN access network to the transmitted signal strength of the WLAN access point is the ratio of the received signal strength of the WLAN access network to the transmitted signal strength of the WLAN access point
  • the signal to interference and noise ratio of the signal of the WLAN access network is the signal to interference and noise ratio of the signal of the WLAN access network
  • the access network load of the WLAN access network is the access network load of the WLAN access network
  • the uplink load of the WLAN access network connected to the WAN is the uplink load of the WLAN access network connected to the WAN
  • the downlink load of the WLAN access network connected to the WAN is the downlink load of the WLAN access network connected to the WAN.
  • the predetermined threshold is configured by the network side by broadcast or paging or dedicated signaling, or is set by the user equipment according to the protocol.
  • the predetermined time is configured by the network side through broadcast or paging or dedicated signaling, or is set by the user equipment according to the protocol.
  • the predetermined number of times is configured by the network side through broadcast or paging or dedicated signaling, or is set by the user equipment according to the protocol.
  • the weighting coefficients of the weighting process are configured by the network side through broadcast or paging or dedicated signaling, or are set by the user equipment according to the protocol.
  • the filtering coefficient of the filtering process is configured by the network side through broadcast or paging or dedicated signaling, or is set by the user equipment according to the protocol.
  • the method in the embodiment of the present invention can ensure that the UE selects a stable WLAN access network and reduces the risk of ping-pong selection.
  • FIG. 2 is a specific flowchart of Embodiment 1 of the present invention.
  • the core network node (CN Node 204) sends a core network policy and auxiliary information to the user equipment (UE 200).
  • a typical core network node in this embodiment is an ANDSF, or a Mobility Management Entity (MME), or a Public Data Network Gateway (P-GW), or a Serving Gateway (referred to as a Serving Gateway. S-GW) and other nodes.
  • MME Mobility Management Entity
  • P-GW Public Data Network Gateway
  • S-GW Serving Gateway
  • the CN Node 204 can actively or passively provide the UE 200 with some strategies recommended by the operator and information about the access network that can assist the UE 200 to make better network selection.
  • the ANDSF can provide the Inter 200 with an Inter-System Mobility Policy (ISMP), an Access Network Discovery Information, and an Inter-System Routing Policy (referred to as an Inter-System Routing Policy).
  • ISMP Inter-System Mobility Policy
  • Access Network Discovery Information an Access Network Discovery Information
  • ISRP Inter-System Routing Policy
  • the access network discovery information includes which radio access networks may exist in the vicinity of the UE, including information such as the identifier and location of the radio access network.
  • ISRP includes which Internet access technologies (IP flow) or PDN (Public Data Network) connections use which radio access technology is best when the UE can connect to two radio access technologies at the same time, which IP is the best. What kind of wireless access technology is used for flow or PDN connection is not allowed.
  • the access network node (RAN Node 202) sends RAN (access network) auxiliary information to the UE 200.
  • a typical access network node in this embodiment is an evolved base station node (eNB), a base station node (NB), a radio network controller (Radio Network Controller, RNC for short), and a base transceiver station (Base Transceiver Station, BTS for short). , Base Station Controller (BSC).
  • eNB evolved base station node
  • NB base station node
  • RNC Radio Network Controller
  • BTS Base Transceiver Station
  • BSC Base Station Controller
  • the RAN Node 202 periodically or aperiodically provides the UE 200 with some auxiliary information, such as load information of the current RAN.
  • some auxiliary information such as load information of the current RAN.
  • the eNB may add the load information of the RAN and the load on the link of the RAN to the core network in the broadcast or the paging message.
  • the specific load information can be expressed by the percentage of resource usage or the cell throughput, link rate, or load level indication.
  • the UE 200 initiates a WLAN scan to obtain a WLAN state parameter.
  • the UE may scan different channels to detect a beacon frame (Beacon frame) of the WLAN access point (abbreviated as ⁇ ) pseudo-period broadcast, and the Beacon frame carries the identifier of the WLAN network, and the UE monitors the Beacon frame to determine that there is a nearby Which WLANs.
  • Beacon frame a beacon frame of the WLAN access point (abbreviated as ⁇ ) pseudo-period broadcast
  • beacon frame
  • the identifier of the WLAN network
  • the UE can measure the signal strength of the WLAN access network by measuring the Beacon frame or the measurement pilot frame (Measure Pilot Frame), and can specifically measure the Received Signal Strength Indication (RSSI) or the received channel power indicator ( Received Channel). Power Indicator, referred to as RCPI).
  • RSSI Received Signal Strength Indication
  • Received Channel Received Channel
  • the UE can listen to the Beacon frame or the Probe Response Frame to get no
  • the signal strength of the line LAN access point can be obtained through the Beacon frame or the Transmit Power Control (TPC Report element) in the Probe Response Frame.
  • the signal of the WLAN access network is used.
  • the strength and the OFDM access point (AP) transmit signal strength can be obtained as the ratio of the received signal strength of the WLAN access network to the transmitted signal strength of the WLAN access point;
  • the UE can measure the signal to interference and noise ratio of the signal of the WLAN access network by measuring the Beacon frame or the Measurement Pilot frame, and can specifically measure the RSSI or RCPI and the Average Noise Power Indicator (ANPI) to calculate the received signal to noise ratio indication ( Received Signal to Noise Indicator (RSNI).
  • RSSI or RCPI the Average Noise Power Indicator
  • ANPI Average Noise Power Indicator
  • RSNI Received Signal to Noise Indicator
  • the UE can send Beacon to other WLAN sites (referred to as STA (mobile station))
  • STA mobile station
  • the UE may send a Channel load Request to other STAs, and if a Channel load Report of other STAs is obtained, the UE may obtain an access network load of the WLAN access network.
  • the UE 200 determines an available access network list, selects an optimal WLAN access network, or the first monitored available WLAN network. In order to reduce the frequent handover between the WLAN and the 3gpp that may be generated, it is necessary to ensure that the WLAN access network selected by the UE is stable.
  • the UE needs to perform screening according to one or more state parameters obtained by acquiring different WLAN networks in step S205. A list of available access networks and the best access network to choose from.
  • the terminal equipment manufacturer can preset a predetermined threshold and/or a predetermined time and/or a predetermined number of times within the UE according to industry standards, or protocols, when the device is manufactured.
  • the WLAN network can be considered as an available network when the status parameter of the WLAN network must meet the preset value and the preset condition.
  • the preset condition can be any one of the following and any combination:
  • the signal strength of the WLAN access network is continuously higher or lower than the predetermined threshold for a predetermined time; when the signal strength of the WLAN access network is continuously higher or lower than the predetermined threshold for a predetermined number of times; when the received signal strength of the WLAN access network is The ratio of the transmitted signal strength of the WLAN access point is continuously higher or lower than the predetermined threshold for a predetermined time;
  • the predetermined number of times is reached
  • the load of the access network of the WLAN access network continues to be lower than or less than the predetermined threshold, the load of the access network of the WLAN access network continues to be lower or lower than the predetermined threshold for a predetermined time.
  • the signal strength of the WLAN access network monitored for a predetermined time or a predetermined number of times is filtered, it is higher or lower than a predetermined threshold.
  • a predetermined threshold includes the following three types:
  • the average value of the signal strength is higher or lower than a predetermined threshold.
  • the UE measures the average signal strength of the Probe Response as S 1 in the first time period of the predetermined time, and the UE measures the average signal strength of the Probe Response as S2 in the second time period of the predetermined time, and the predetermined threshold is Thresholdl.
  • k is multiplied by SI plus (1-k) and S2 is greater than Threshold1, where k is a filter coefficient, and the value ranges from 0 kl, then the WLAN network is available;
  • the UE measures the average signal strength of the Probe Response as S2 in the second time period.
  • the first measurement of the Beacon signal strength by the UE is S1
  • the second measurement of the Beacon signal strength is S2
  • the predetermined threshold is Thresholdl
  • k is multiplied by SI plus (1-k) times S2 is greater than Thresholdl
  • k is The filter coefficient, in the range of 0 kl, is available for the WLAN network
  • the ratio of the transmitted signal strength of the line local area network access point is higher or lower than the predetermined threshold after being filtered; when the signal to interference and noise ratio of the WLAN access network monitored for a predetermined time or a predetermined number of times is filtered or higher, it is higher or smaller than Scheduled threshold
  • the downlink load is filtered or less than or less than a predetermined threshold
  • the ratio of the transmitted signal strength of the WLAN access point, the signal to interference and noise ratio of the signal of the WLAN access network, the access network load of the WLAN access network, the link uplink load of the WLAN access network connected to the WAN, and the WLAN access network connection Any combination of link downlink loads to the wide area network is weighted and continues to be higher or lower than a predetermined threshold, or continuously below or no greater than a predetermined threshold for a predetermined time and/or a predetermined number of times.
  • the first time that the UE monitors the ratio of the received signal strength of the WLAN access network to the transmitted signal strength of the WLAN access point is D1, and the UE monitors the access network load of the WLAN access network for the first time within a predetermined time, and is scheduled to be T1.
  • the threshold is Thresholdl, (1-k) multiplied by D1 plus k times T1 is greater than Threshold1, where k is the weighting factor, and -1 ⁇ k ⁇ 0, the UE monitors the received signal strength of the WLAN access network and the WLAN for the second time.
  • the ratio of the transmitted signal strength of the access point is D2, and the UE monitors the access network load of the WLAN access network for the second time within a predetermined time as T2, (1-k) multiplied by D2 plus k times T2 is greater than Threshold1, predetermined The number of times is 2, then the WLAN network is available;
  • the signal to interference and noise ratio SINR2 of the signal of the WLAN access network is subjected to the weighting process and continues to be higher or lower than the predetermined threshold Threshold2 for a predetermined time T2, in the T2 time. , satisfies a multiplied by S2 plus (1-a) multiplied by SINR2>Threshold2, where a is a weighting coefficient, and the value ranges from 0 a 1;
  • the ratio of the received signal strength of the WLAN access network to the transmitted signal strength of the WLAN access point, and the WLAN access network are filtered respectively.
  • the weighting process is higher or lower than the predetermined threshold, or lower or lower than the predetermined threshold, wherein the filtering processing and the weighting processing are the same as described above.
  • the UE After determining the available access network list by using the foregoing preset conditions, the UE selects an optimal WLAN access network to perform association and the like.
  • the best WLAN access network can be selected by using the above method for determining the available access network list, comparing the status of different available WLAN access networks, or weighting values of multiple states, and selecting the best one.
  • FIG. 3 is a specific flow chart of Embodiment 2 of the present invention.
  • the core network node (CN Node 304) sends a core network policy and auxiliary information to the user equipment (UE 300).
  • This step is the same as that of S201 and will not be described again.
  • the UE 300 initiates a WLAN scan to obtain a WLAN state parameter.
  • This step is the same as that of S205 and will not be described again.
  • the UE 300 determines an available access network list, selects an optimal WLAN access network, or selects a first monitored available WLAN access network.
  • the UE determines a list of available access networks according to the control information notified by the RAN node, the policy and auxiliary information notified by the CN node, and the state parameters of the WLAN network obtained in S305, and selects an optimal access network to perform association and other processes. .
  • Selecting the best WLAN access network can use the above method to determine the available access network list, compare the status of different available WLAN access networks, or the weighting values of multiple states, select the most A good one.
  • Figure 4 is a specific flow chart of Embodiment 3 of the present invention.
  • the core network node (CN Node 404) sends a core network policy and auxiliary information to the user equipment (UE 400).
  • This step is the same as that of S201 and will not be described again.
  • the RAN Node 402 sends the RAN control information to the UE 400. This step is the same as that of S303, and details are not described herein.
  • the UE 400 initiates a WLAN scan to obtain a WLAN status parameter.
  • This step is the same as that of S205 and will not be described again.
  • the UE 400 determines a list of available access networks.
  • the UE determines the available access network list according to the control information notified by the RAN node, the policy and auxiliary information notified by the CN node, and the state parameters of the WLAN network obtained in S305.
  • the UE 400 sends the list of available access networks to the RAN Node 402.
  • the UE sends the determined list of available access networks to the RAN Node, waiting for the RAN Node to make a final decision whether to allow the UE to access a certain WLAN network and which WLAN network to access.
  • the RAN Node 402 sends the decision result to the UE 400;
  • the RAN Node obtains a list of available access networks obtained in S409, and an available access list of other UEs received by itself, and other auxiliary information about the WLAN from other channels such as the WLAN AP of the shared station, or other UEs. Unified planning of which UEs enter a certain WLAN network, which UEs enter other WLAN networks, which UEs do not access the WLAN network, and send the final decision result to the UE.
  • multiple UEs can be prevented from simultaneously determining that a certain WLAN network is optimal, and accessing the WLAN network at the same time causes the WLAN network to be overloaded, so that these UEs cannot receive services, and return to the RAN, which affects the user experience and wastes resources and resources.
  • the energy of the UE is not limited to the energy of the UE.
  • the network side configures a predetermined threshold and other parameters for the UE, and selects an available access network condition or a UE internal preset threshold, and selects an access network.
  • the condition can ensure that the UE selects a suitable WLAN network, improves the user experience, improves network resource utilization, and saves UE power.
  • FIG. 6 is a schematic diagram of a user equipment according to an embodiment of the present invention. As shown in FIG. 6, the user equipment in this embodiment includes:
  • the monitoring module 601 is configured to monitor whether the state of the wireless local area network access network continues to meet the predetermined threshold for a predetermined time and/or reach a predetermined number of times, or monitor the state of the wireless local area network access network for a predetermined time or a predetermined number of times to be filtered. Whether the predetermined threshold is met after processing;
  • the determining module 602 is configured to determine that the wireless local area network access network is an available access network if the monitoring module detects that the predetermined condition is met.
  • the monitoring module 601 monitors whether the state of the wireless local area network access network continues to meet the predetermined threshold for a predetermined time and/or reaches a predetermined number of times by: monitoring whether states of the one or more wireless local area network access networks are respectively Continuing to meet the predetermined threshold for a predetermined time and/or reaching a predetermined number of times, or whether the state of the plurality of WLAN access networks continues to satisfy the predetermined threshold for a predetermined time and/or a predetermined number of times after the weighting process, or any of a plurality of states Whether or not a predetermined threshold is continuously met for a predetermined time and/or a predetermined number of times.
  • the monitoring module 601 monitors whether the state of the wireless local area network access network after a predetermined time or a predetermined number of times passes the predetermined threshold after filtering: monitoring the state of the wireless local area network access network within a predetermined time Whether the average of the plurality of time periods is subjected to the weighting process to satisfy the predetermined threshold; or monitoring whether the state of the wireless local area network access network satisfies the predetermined threshold after the average of the predetermined predetermined number of time periods is weighted; or monitoring the continuous Whether the predetermined number of times of the state of the WLAN access network satisfies a predetermined threshold after weighting processing.
  • the monitoring module 601 monitors the state of the wireless local area network access network within a predetermined time or a predetermined number of times to meet a predetermined threshold after filtering: monitoring the plurality of wireless local area network access networks within a predetermined time or a predetermined number of times Whether the state is filtered or not, respectively, whether the predetermined threshold is met, or whether the predetermined threshold is met after being weighted after being filtered, or in a plurality of states Whether any of the filtered processes meet the predetermined threshold.
  • the status of the WLAN access network monitored by the monitoring module 601 includes one or more of the following:
  • the ratio of the received signal strength of the WLAN access network to the transmitted signal strength of the WLAN access point is the ratio of the received signal strength of the WLAN access network to the transmitted signal strength of the WLAN access point
  • the signal to interference and noise ratio of the signal of the WLAN access network is the signal to interference and noise ratio of the signal of the WLAN access network
  • the access network load of the WLAN access network is the access network load of the WLAN access network
  • the uplink load of the WLAN access network connected to the WAN is the uplink load of the WLAN access network connected to the WAN
  • the downlink load of the WLAN access network connected to the WAN is the downlink load of the WLAN access network connected to the WAN.
  • the monitoring module 601 obtains a beacon report or a link measurement report by measuring a beacon frame or a measurement pilot frame, or sending a beacon request or a link measurement request to the wireless local area network station.
  • Obtaining the signal strength of the WLAN access network Obtaining the received signal strength and wireless of the WLAN access network by monitoring the beacon frame or the probe response frame and the signal strength of the WLAN access network that has been mastered a ratio of the strength of the signal transmitted by the local area network access point; by measuring the beacon frame or measuring the pilot frame, or by transmitting a link measurement request to the WLAN station after receiving the link measurement request, or by going to the wireless
  • the noise histogram report obtained by the local area network station after receiving the noise histogram request and the signal strength of the wireless local area network access network obtained, obtain the signal to interference and noise ratio of the signal of the wireless local area network access network; a frame or probe response frame, or by sending a channel load request to the WLAN station Obtaining a replied channel load report, obtaining an access network load of the WLAN access network
  • the user equipment may further include
  • the configuration module 603 is configured to accept that the network side configures by broadcast or paging or dedicated signaling, or sets the predetermined threshold, the predetermined time, the predetermined number of times, and the filter coefficient of the filtering process according to a protocol.
  • modules or steps of the present invention described above can be implemented with a general purpose computing device, which can be centralized on a single computing device, or distributed. Alternatively, on a network of computing devices, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately Each integrated circuit module, or a plurality of modules or steps thereof, are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.
  • the present invention provides a method for selecting an available access network and a user equipment, which can ensure
  • the UE selects a stable WLAN access network, reducing the risk of ping-pong selection.

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Abstract

一种选择可用接入网络的方法及用户设备,所述方法包括:用户设备监测到无线局域网接入网的状态持续满足预定门限达到预定时间和/或达到预定次数,或者监测到预定时间内或预定次数的所述无线局域网接入网的状态经滤波处理后满足预定门限时,则认定所述无线局域网接入网为可用接入网络。

Description

一种选择可用接入网络的方法及用户设备
技术领域
本发明涉及通信领域, 尤其涉及一种选择可用接入网络的方法及用户设 备。 背景技术
随着无线通信技术和标准的不断演进,移动分组业务得到了巨大的发展, 单用户设备(User Equipment, 简称为 UE ) 的数据吞吐能力不断在提升。 以 长期演进( Long Term Evolution , 简称为 LTE ) 系统为例, 在 20M带宽内可 以支持下行最大速率 100Mbps 的数据传输, 后续的增强的 LTE ( LTE Advanced ) 系统中, 数据的传输速率将提升, 甚至可以达到 lGbps。
UE数据业务量膨胀式的增长,让相关的网络资源渐渐力不从心, 尤其是 在新一代通信技术 (比如, 第三代移动通信技术 3G、 长期演进 LTE )还无法 广泛布网的情况下, 随之而来的是用户速率和流量需求无法满足, 用户体验 的变差。 如何预防和改变这一情况是运营商必须考虑的问题, 一方面需要加 快新技术的推广和网络部署; 另一方面, 希望能够通过对相关网络和技术进 行增强, 以达到快速提升网络性能的目的。 众所周知的, 在第三代合作伙伴 计划 ( The 3rd Generation Partnership Proj ect , 简称为 3 GPP )提供的无线网络 技术之外, 当前已经普遍应用的无线局域网 ( Wireless Local Area Network, 简称为 WLAN ) , 尤其是基于 IEEE802.i l标准的无线局域网已经在家庭、 企 业甚至是互联网被广泛应用于热点接入覆盖。 其中, 由 WIFI联盟(Wi-Fi Alliance )提出的技术规范应用最广, 因此实际中 WIFI网络经常跟基于 IEEE 802.11标准的 WLAN网络划等号,在不引起混淆的情况下,后文也釆用 WIFI 模块来描述网络节点中支持 WLAN的无线收发和处理模块。
在这一前提下, 有的运营商和公司已经提出将 WLAN与相关 3GPP接入 网进行融合, 实现联合传输, 使用 WLAN网络达到对相关 3GPP接入网进行 负荷分担(Offload )和提高网络性能的目的。 现在 3GPP 已经制定了 3GPP 接入网与 WLAN网络互通( Interworking ) 的相关协议, 如图 1 所示, 目前 3GPP的 Interworking WLAN架构允许 WLAN网络使用 3GPP接入网内的认证 授权记贝长服务器(Authentication Authorization Accounting, 简称为 AAA )进 行统一认证授权, 同时可以复用相关 3GPP接入网中的分组数据网络网关作 为 WLAN 网络的分组数据网关, 同时还可以实现两个网络的统一记账计费 等, 达到了两个网络的松耦合。
但目前的 Interworking 架构中还存在一些不足之处, 比如, 目前的 Interworking是由 UE触发的, 3GPP网络侧对于目标接入网络没有控制权, 虽然核心网侧的网元接入网发现支持功能( Access Network Discovery Support Function, 简称 ANDSF ) 虽然会给予一些策略性的规则, 但是这些规则相对 比较静态, 3GPP 网络侧对于 UE选择接入网络失去了控制权, 这可能导致 UE选择的接入网络并不能满足 UE的 QoS ( Quality of Service, 服务质量 )需 求, 或者导致 UE在 3GPP接入网与 WLAN接入网络之间频繁进行切换, 影 响用户体验, 同时也增加了不必要的网络负担。
发明内容
本发明实施例提供一种选择可用接入网络的方法及用户设备, 以解决相 关技术中 UE在 3GPP接入网与 WLAN接入网之间频繁选择的问题。
本发明实施例提供了一种选择可用接入网络的方法, 包括:
用户设备监测到无线局域网接入网的状态持续满足预定门限达到预定时 间和 /或达到预定次数, 或者监测到预定时间内或预定次数的所述无线局域网 接入网的状态经滤波处理后满足预定门限时, 则认定所述无线局域网接入网 为可用接入网络。
可选地, 上述方法还具有下面特点:
所述用户设备监测到所述无线局域网接入网的状态持续满足预定门限达 到预定时间和 /或达到预定次数, 包括:
所述用户设备监测到所述一种或多种无线局域网接入网的状态分别持续 满足, 或多种无线局域网接入网的状态经过加权处理后持续满足, 或多种状 态中的任意一种持续满足预定门限达到预定时间和 /或达到预定次数。 可选地, 上述方法还具有下面特点: 所述用户设备监测到预定时间内或 预定次数的所述无线局域网接入网的状态经滤波处理后满足预定门限,包括: 所述用户设备监测到所述无线局域网接入网的状态在预定时间内的多个 时间段的平均值经过加权处理后满足预定门限;
或所述用户设备监测到所述无线局域网接入网的状态在连续预定次数个 时间段的平均值经过加权处理后满足预定门限;
或所述用户设备监测到连续的预定次数的所述无线局域网接入网的状态 经过加权处理后满足预定门限。
可选地, 上述方法还具有下面特点:
所述用户设备监测到预定时间内或预定次数的所述无线局域网接入网的 状态经滤波处理后满足预定门限, 包括:
所述用户设备监测到预定时间内或预定次数的所述多种无线局域网接入 网的状态经过滤波处理后分别满足预定门限, 或者经过滤波后再做加权处理 后满足预定门限, 或者多种状态中的任意一种经滤波处理后满足预定门限。
可选地, 上述方法还具有下面特点: 所述无线局域网接入网的状态包括 以下的一种或多种:
无线局域网接入网的信号强度;
无线局域网接入网的接收信号强度与无线局域网接入点发射信号强度的 比值;
无线局域网接入网的信号的信干噪比;
无线局域网接入网的接入网负荷;
无线局域网接入网连接到广域网的链路上行负荷; 以及
无线局域网接入网连接到广域网的链路下行负荷。
可选地, 上述方法还具有下面特点:
所述用户设备通过测量信标帧或测量导频帧, 或者通过向所述无线局域 网站点发送信标请求或链路测量请求后得到回复的信标报告或者链路测量报 告, 获得所述无线局域网接入网的信号强度; 所述用户设备通过监听信标帧或探针响应帧与已掌握的所述无线局域网 接入网的信号强度, 获得所述无线局域网接入网的接收信号强度与无线局域 网接入点发射信号强度的比值;
所述用户设备通过测量信标帧或测量导频帧, 或者通过向所述无线局域 网站点发送链路测量请求后得到回复的链路测量报告, 或者通过向所述无线 局域网站点发送噪声直方图请求后得到回复的噪声直方图 ^艮告与已掌握的所 述无线局域网接入网的信号强度, 获得所述无线局域网接入网的信号的信干 噪比;
所述用户设备通过监听信标帧或探针响应帧, 或者通过向所述无线局域 网站点发送信道负荷请求后得到回复的信道负荷才艮告, 获得所述无线局域网 接入网的接入网负荷; 以及
所述用户设备通过监听信标帧或探针响应帧获得所述无线局域网接入网 连接到广域网的链路上行负荷和所述无线局域网接入网连接到广域网的链路 下行负荷。
可选地, 上述方法还具有下面特点:
所述预定门限由网络侧通过广播或寻呼或专用信令配置, 或者由所述用 户设备按照协议规定自行设置。
可选地, 上述方法还具有下面特点:
所述预定时间由网络侧通过广播或寻呼或专用信令配置, 或者由所述用 户设备按照协议规定自行设置。
可选地, 上述方法还具有下面特点:
所述预定次数由网络侧通过广播或寻呼或专用信令配置, 或者由所述用 户设备按照协议规定自行设置。
可选地, 上述方法还具有下面特点:
所述滤波处理的滤波系数由网络侧通过广播或寻呼或专用信令配置, 或 者由所述用户设备按照协议规定自行设置。
可选地, 上述方法还具有下面特点: 所述加权处理的加权系数由网络侧通过广播或寻呼或专用信令配置, 或 者由所述用户设备按照协议规定自行设置。
本发明实施例还提供了一种用户设备, 包括:
监测模块, 其设置成监测无线局域网接入网的状态是否持续满足预定门 限达到预定时间和 /或达到预定次数, 或者监测预定时间内或预定次数的所述 无线局域网接入网的状态经滤波处理后是否满足预定门限; 以及
判定模块, 其设置成在所述监测模块监测到满足预定条件的情况下, 认 定所述无线局域网接入网为可用接入网络。
可选地, 上述用户设备还具有下面特点:
所述监测模块通过如下方式监测所述无线局域网接入网的状态是否持续 满足预定门限达到预定时间和 /或达到预定次数: 监测所述一种或多种无线局 域网接入网的状态是否分别持续满足预定门限达到预定时间和 /或达到预定 次数, 或多种无线局域网接入网的状态经过加权处理后是否持续满足预定门 限达到预定时间和 /或达到预定次数, 或多种状态中的任意一种是否持续满足 预定门限达到预定时间和 /或达到预定次数。
可选地, 上述用户设备还具有下面特点:
所述监测模块通过如下方式监测到预定时间内或预定次数的所述无线局 域网接入网的状态经滤波处理后是否满足预定门限: 监测所述无线局域网接 入网的状态在预定时间内的多个时间段的平均值经过加权处理后是否满足预 定门限; 或监测所述无线局域网接入网的状态在连续预定次数个时间段的平 均值经过加权处理后是否满足预定门限; 或监测连续的预定次数的所述无线 局域网接入网的状态经过加权处理后是否满足预定门限。
可选地, 上述用户设备还具有下面特点:
所述监测模块通过如下方式监测预定时间内或预定次数的所述无线局域 网接入网的状态经滤波处理后满足预定门限: 监测预定时间内或预定次数的 所述多种无线局域网接入网的状态经过滤波处理后分别是否满足预定门限, 或者经过滤波后再做加权处理后是否满足预定门限, 或者多种状态中的任意 一种经滤波处理后是否满足预定门限。 可选地, 上述用户设备还具有下面特点: 所述监测模块监测的无线局域 网接入网的状态包括以下的一种或多种:
无线局域网接入网的信号强度;
无线局域网接入网的接收信号强度与无线局域网接入点发射信号强度的 比值;
无线局域网接入网的信号的信干噪比;
无线局域网接入网的接入网负荷;
无线局域网接入网连接到广域网的链路上行负荷; 以及
无线局域网接入网连接到广域网的链路下行负荷。
可选地, 上述用户设备还具有下面特点:
所述监测模块通过如下方式的一种或多种监测到无线局域网接入网的状 态:
测量信标帧或测量导频帧, 或者向所述无线局域网站点发送信标请求或 链路测量请求后得到回复的信标报告或者链路测量报告, 获得所述无线局域 网接入网的信号强度;
监听信标帧或探针响应帧与已掌握的所述无线局域网接入网的信号强 度, 获得所述无线局域网接入网的接收信号强度与无线局域网接入点发射信 号强度的比值;
测量信标帧或测量导频帧, 或者向所述无线局域网站点发送链路测量请 求后得到回复的链路测量报告, 或者是通过向所述无线局域网站点发送噪声 直方图请求后得到回复的噪声直方图报告与已掌握的所述无线局域网接入网 的信号强度, 获得所述无线局域网接入网的信号的信干噪比;
监听信标帧或探针响应帧, 或者是通过向所述无线局域网站点发送信道 负荷请求后得到回复的信道负荷报告, 获得所述无线局域网接入网的接入网 负荷; 以及
监听信标帧或探针响应帧获得所述无线局域网接入网连接到广域网的链 路上行负荷和所述无线局域网接入网连接到广域网的链路下行负荷。 可选地, 上述用户设备还具有下面特点:
所述用户设备还包括,
配置模块, 其设置成接受网络侧通过广播或寻呼或专用信令配置, 或者 按照协议规定自行设置所述预定门限、 所述预定时间、 所述预定次数、 所述 滤波处理的滤波系数以及所述加权处理的加权系数。
综上, 本发明实施例提供一种选择可用接入网络的方法及用户设备, 能 够保证 UE选择到一个稳定的 WLAN接入网络, 降低可能产生乒乓选择的风 险。 附图概述
此处所说明的附图用来提供对本发明实施例的理解, 构成本申请的一部 分, 本发明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的 不当限定。 在附图中:
图 1是根据相关技术的网络互通协议的架构的示意图;
图 2为本发明实施例的一种选择可用接入网络的方法的流程图; 图 3是本发明实施例一的流程示意图;
图 4是本发明实施例二的流程示意图;
图 5是本发明实施例三的流程示意图;
图 6是本发明实施例的用户设备的示意图。
本发明的较佳实施方式
下文中将结合附图对本发明的实施例进行详细说明。 需要说明的是, 在 不冲突的情况下, 本申请中的实施例及实施例中的特征可以相互任意组合。
图 2为本发明实施例的一种选择可用接入网络的方法的流程图, 如图 2 所示, 本实施例的方法包括以下步骤:
511、 UE获取一种或多种 WLAN接入网的状态;
512、 UE监测到所述 WLAN接入网的状态持续满足预定门限达到预定时 间和 /或达到预定次数, 或者监测到预定时间内或预定次数的所述 WLAN接 入网的状态经滤波处理后满足预定门限时,则认定所述 WLAN接入网为可用 接入网络。
在一较佳实施例中, UE获取多种无线局域网接入网的状态, 当 UE监测 到所述一种或多种 WLAN接入网的状态分别持续满足或经过加权处理后持 续满足或多种中的任意一种持续满足预定门限达到预定时间和 /或达到预定 次数, 则认定所述 WLAN接入网为可用接入网络。
在一较佳实施例中, UE监测到所述无线局域网接入网的状态在预定时间 内的多个时间段的平均值经过加权处理后满足预定门限, 或所述用户设备监 测到所述无线局域网接入网的状态在连续预定次数个时间段的平均值经过加 权处理后满足预定门限或所述用户设备监测到连续的预定次数的所述无线局 域网接入网的状态经过加权处理后满足预定门限,则认定所述 WLAN接入网 为可用接入网络。
在一较佳实施例中, UE获取多种无线局域网接入网的状态, 当 UE监测 到预定时间内或预定次数的所述多种无线局域网接入网的状态经过滤波处理 后分别满足或者经过滤波后再做加权处理后满足或者多种状态中的任意一种 满足预定门限, 则认定所述 WLAN接入网为可用接入网络。
其中, 所述 WLAN接入网的状态包括以下的一种或多种:
WLAN接入网的信号强度;
WLAN接入网的接收信号强度与 WLAN接入点发射信号强度的比值;
WLAN接入网的信号的信干噪比;
WLAN接入网的接入网负荷;
WLAN接入网连接到广域网的链路上行负荷;
WLAN接入网连接到广域网的链路下行负荷。
其中, 所述预定门限由网络侧通过广播或寻呼或专用信令配置, 或者由 所述用户设备按照协议规定自行设置。
所述预定时间由网络侧通过广播或寻呼或专用信令配置, 或者由所述用 户设备按照协议规定自行设置。 所述预定次数由网络侧通过广播或寻呼或专用信令配置, 或者由所述用 户设备按照协议规定自行设置。
所述加权处理的加权系数由网络侧通过广播或寻呼或专用信令配置, 或 者由所述用户设备按照协议规定自行设置。
所述滤波处理的滤波系数由网络侧通过广播或寻呼或专用信令配置, 或 者由所述用户设备按照协议规定自行设置。
这样, 本发明实施例的方法能够保证 UE选择到一个稳定的 WLAN接入 网络, 降低可能产生乒乓选择的风险。
实施例一
图 2是本发明实施例一的具体流程图。
S201、 核心网节点 (CN Node 204 ) 向用户设备 ( UE 200 )发送核心网 策略及辅助信息;
本实施例中典型的核心网节点为 ANDSF, 或移动管理实体 ( Mobility Management Entity, 简称 MME ) , 或者公共数据网网关( Public Data Network Gateway, 简称 P-GW ) , 或者服务网关 (Serving Gateway, 简称 S-GW )等 节点。 CN Node 204可以主动或被动向 UE 200提供一些运营商比较推荐的策 略以及可以辅助 UE 200更好的做网络选择的有关接入网的信息。
以 ANDSF 为例, ANDSF 可以向 UE 200 提供系统间移动策略 ( Inter-System Mobility Policy ,简称 ISMP )、接入网发现信息( Access Network Discovery Information )和系统间路由策略 ( Inter- System Routing Policy , 简称 ISRP ) 。
其中, ISMP包括: 不同的无线接入技术的优先级, 以及相同无线接入技 术的不同无线接入网络之间的优先级, 以及一些限制信息, 比如从某一种无 线接入技术切换到另外一种无线接入技术在哪段时间或一直是不允许的等内 容。
接入网发现信息包括 UE附近可能有哪些无线接入网络, 包括无线接入 网的标识、 位置等信息。 ISRP包括当 UE可以同时连接到两种无线接入技术时, 哪些因特网协议 流( IP flow )或 PDN ( Public Data Network, 公用数据网)连接使用哪种无线 接入技术是最好的, 哪些 IP flow或 PDN连接使用哪种无线接入技术是不允 许的等内容。 S203、 接入网节点 ( RAN Node 202 )向 UE 200发送 RAN (接入网)辅 助信息;
本实施例中典型的接入网节点为演进的基站节点 (eNB ) 、 基站节点 ( NB ) 、 无线网络控制器(Radio Network Controller, 简称 RNC ) 、 基站收 发信台 (Base Transceiver Station, 简称 BTS ) 、 基站控制器(Base Station Controller, 简称 BSC ) 。
RAN Node 202周期性或者非周期性向 UE 200提供一些辅助信息, 比如 当前 RAN的负荷信息。 以 eNB为例, eNB可以在广播中或者寻呼消息中加 入 RAN的负荷信息以及 RAN连接到核心网的链路上的负荷。 具体的负荷信 息可以用资源使用百分比或者小区吞吐量、 链路速率、 或者负荷高低指示等 方式表示。
S205、 UE 200发起 WLAN扫描, 获取 WLAN状态参数;
UE可以根据 RAN以及 CN ( Core Network, 核心网)提供的辅助信息和 策略,若认定当前可以将一部分业务分流到 WLAN网络中以获得用户体验更 高的服务或者以减轻 RAN侧的负担或者以遵从运营商制定的策略时, UE将 发起 WLAN扫描和 /或 WLAN状态参数获取的流程。
UE可以扫描不同的信道来探测 WLAN接入点 ( Access Point , 简称 ΑΡ ) 伪周期广播的信标帧(Beacon帧), Beacon帧中携带有 WLAN网络的标识, UE通过监听 Beacon帧来确定附近有哪些 WLAN。
UE可以测量 Beacon帧或者测量导频帧( Measurement Pilot Frame )得到 WLAN接入网的信号强度, 具体可以测量接收的信号强度指示 (Received Signal Strength Indication,简称 RSSI ),或接收信道功率指示( Received Channel Power Indicator, 简称 RCPI ) 。
UE可以监听 Beacon帧或者探针响应帧 ( Probe Response Frame )得到无 线局域网接入点发射信号强度, 具体可以通过 Beacon帧或者 Probe Response Frame 中的传输功率控制 (Transmit Power Control )才艮告元素 (TPC Report element )来获取, 利用已掌握的 WLAN接入网的信号强度与 WLAN接入点 ( Access Point, 简称 AP )发射信号强度可以得到无线局域网接入网的接收信 号强度与无线局域网接入点发射信号强度的比值;
UE可以测量 Beacon帧或者 Measurement Pilot帧得到 WLAN接入网的信 号的信干噪比, 具体可以测量 RSSI或 RCPI与平均噪声功率指示 (Average Noise Power Indicator,简称 ANPI )计算出接收信噪比指示( Received Signal to Noise Indicator, 简称 RSNI ) 。
UE可以监听 Beacon帧或探针响应帧( Probe Response Frame )得到 WLAN 接入网的接入网负荷与 WLAN接入网连接到广域网的链路上行和 /或下行负 荷, 具体可以通过监听 Beacon帧或 Probe Response帧中的基本服务集负载元 素( BSS Load element )来获取,具体可以通过监听 Beacon帧或 Probe Response 帧中的广域网度量元素 ( WAN Metrics element )来获取。
UE可以通过向其他 WLAN站点 (简称 STA (移动台) )发送 Beacon
Request (信标请求) , Link Measurement Request (链路测量请求) , 口果得 到其他 STA回复的 Beacon Report (信标 4艮告), Link Measurement Report (链 路测量报告) , 则可以获得 WLAN接入网的信号强度。
UE可以通过向其他 STA发送 Link Measurement Request, 如果得到其他 STA回复的 Link Measurement Report, 则可以获得 WLAN接入网的信号的信 干噪比, UE 可以通过向其他 STA发送噪声直方图请求 (Noise Histogram Request ) , 如果得到 Noise Histogram Report (噪声直方图报告) , 通过自己 已掌握的 WLAN接入网的信号强度, 则可以通过计算获得 WLAN接入网的 信号的信干噪比。
UE可以通过向其他 STA发送 Channel load Request (信道负荷请求) , 如果得到其他 STA回复的 Channel load Report (信道负荷报告), 则 UE可以 获得 WLAN接入网的接入网负荷。
S207、 UE 200确定可用接入网络列表, 选取最佳 WLAN接入网络, 或 第一个监测到的可用 WLAN网络; 为了减少可能产生的 WLAN与 3gpp之间的频繁切换, 必须保证 UE选 择的 WLAN接入网时稳定的, UE需要根据通过步骤 S205获取到不同 WLAN 网络的一种或多种状态参数进行筛选, 确定可用的接入网络列表, 并从中选 取最佳接入网络。
终端设备厂商可以在生产设备时就根据行业标准, 或者协议规定在 UE 内部预置预定门限和 /或预定时间和 /或预定次数。 当 UE需要执行 3gpp 与 WLAN网络的 interworking, 确定可用接入网络时, WLAN网络的状态参数 必须满足预置的值以及预置的条件时,该 WLAN网络才可以被认为是可用网 络。 预置的条件可以是以下任意之一以及任意组合:
当 WLAN接入网的信号强度持续高于或不小于预定门限达到预定时间; 当 WLAN接入网的信号强度持续高于或不小于预定门限达到预定次数; 当 WLAN接入网的接收信号强度与无线局域网接入点发射信号强度的 比值持续高于或不小于预定门限达到预定时间;
当 WLAN接入网的接收信号强度与无线局域网接入点发射信号强度的 比值持续高于或不小于预定门限达到预定次数;
当 WLAN接入网的信号的信干噪比持续高于或不小于预定门限达到预 定时间;
当 WLAN接入网的信号的信干噪比持续高于或不小于预定门限达到预 定次数;
当 WLAN接入网的接入网负荷持续低于或不大于预定门限达到预定时 当 WLAN接入网的接入网负荷持续低于或不大于预定门限达到预定次
WLAN接入网
Figure imgf000014_0001
达到预定时间;
当 WLAN接入网
Figure imgf000014_0002
达到预定次数;
当 WLAN接入网连接 1 达到预定时间;
当 WLAN接入网连接到广域网的链路下行负荷低于或不大于预定门限 达到预定次数;
当监测到预定时间内或预定次数的 WLAN接入网的信号强度经滤波处 理后高于或不小于预定门限。 具体来说包括以下三种:
1 ) 当 WLAN接入网的信号强度在预定时间内多个时间段的平均值经过 滤波处理后高于或不小于预定门限。
例如, UE在预定时间内的第一个时间段测量 Probe Response的平均信号 强度为 S 1 , UE在预定时间内的第二个时间段测量 Probe Response的平均信 号强度为 S2, 预定门限为 Thresholdl, k乘以 SI加上(1-k)乘以 S2大于 Thresholdl, 其中, k是滤波系数, 取值范围为 0 k l, 则该 WLAN网络是 可用的;
2) 当 WLAN接入网的信号强度在连续预定次数个时间段的平均值经过 滤波处理后高于或不小于预定门限。
例如, UE在第二个时间段测量 Probe Response的平均信号强度为 S2,
UE在第三个时间段测量 Probe Response的平均信号强度为 S3, 预定次数为 2次,预定门限为 Thresholdl, k乘以 S2加上 ( 1-k)乘以 S3大于 Thresholdl, 其中, k是滤波系数, 取值范围为 0 k l, 则该 WLAN网络是可用的;
3) 当用户设备监测到连续的预定次数的 WLAN接入网的信号强度经过 滤波处理后高于或不小于预定门限。
例如, UE第一次测量 Beacon的信号强度为 S1, 第二次测量 Beacon的 信号强度为 S2, 预定门限为 Thresholdl, k乘以 SI加上( 1-k)乘以 S2大于 Thresholdl, 其中 k是滤波系数, 取值范围为 0 k l, 则该 WLAN网络是可 用的;
"滤波处理" 是指对连续获取的某一种状态的多个值进行加权平均的处 理方式, 其中每个值的加权系数称为滤波系数, 滤波系数的取值范围为 0~1 之间, 包括边界值。
当监测到预定时间内或预定次数的 WLAN接入网的接收信号强度与无 线局域网接入点发射信号强度的比值经滤波处理后高于或不小于预定门限; 当监测到预定时间内或预定次数的 WLAN接入网的信干噪比经滤波处 理后高于或不小于预定门限;
当监测到预定时间内或预定次数的 WLAN接入网的接入网负荷经滤波 处理后低于或不大于预定门限;
当监测到预定时间内或预定次数的 WLAN接入网连接到广域网的链路 上行负荷经滤波处理后低于或不大于预定门限;
当监测到预定时间内或预定次数的 WLAN接入网连接到广域网的链路 下行负荷经滤波处理后低于或不大于预定门限;
当监测到 WLAN接入网的信号强度、 WLAN接入网的接收信号强度与
WLAN接入点发射信号强度的比值、 WLAN接入网的信号的信干噪比、 WLAN 接入网的接入网负荷、 WLAN接入网连接到广域网的链路上行负荷和 WLAN 接入网连接到广域网的链路下行负荷的任意组合经过加权处理后持续高于或 不小于预定门限, 或持续低于或不大于预定门限达到预定时间和 /或达到预定 次数。
例如, UE第一次监测 WLAN接入网的接收信号强度与 WLAN接入点发 射信号强度的比值为 Dl , UE在预定时间内第一次监测 WLAN接入网的接入 网负荷为 T1 , 预定门限为 Thresholdl , ( 1-k )乘上 Dl加上 k乘上 T1大于 Thresholdl, 其中 k为加权系数, 并且 -1 < k < 0, UE第二次监测 WLAN接入 网的接收信号强度与 WLAN接入点发射信号强度的比值为 D2, UE在预定时 间内第二次监测 WLAN接入网的接入网负荷为 T2, ( 1-k )乘上 D2加上 k 乘上 T2大于 Thresholdl , 预定次数为 2 , 则该 WLAN网络为可用的;
例如, 当 UE监测到 WLAN接入网的信号强度 S2, WLAN接入网的信 号的信干噪比 SINR2 ,经过加权处理后持续高于或不小于预定门限 Threshold2 达到预定时间 T2 , 在 T2 时间内, 满足 a 乘以 S2 加上 ( 1-a ) 乘以 SINR2>Threshold2, 其中 a是加权系数, 取值范围为 0 a 1;
当监测到预定时间内或预定次数的 WLAN接入网的信号强度、 WLAN接 入网的接收信号强度与 WLAN接入点发射信号强度的比值、 WLAN接入网的 信号的信干噪比、 WLAN接入网的接入网负荷、 WLAN接入网连接到广域网 的链路上行负荷和 WLAN接入网连接到广域网的链路下行负荷的任意组合 分别经过滤波后再做加权处理后高于或不小于预定门限, 或者低于或不大于 预定门限, 其中滤波处理和加权处理的方法与前述相同。
UE利用上述预置条件确定可用接入网列表后, 从中选取最佳的 WLAN 接入网执行关联等流程。
选取最佳的 WLAN接入网可以利用上述确定可用接入网列表时使用的 方法, 比较不同的可用 WLAN接入网的状态, 或多种状态的加权值, 选取最 佳的一个。
实施例 2
图 3是本发明实施例 2的具体流程图。
S301、 核心网节点 (CN Node 304 ) 向用户设备 ( UE 300 )发送核心网 策略及辅助信息;
本步骤与 S201相同, 不再赘述。
S303、 接入网节点 (RAN Node 302 ) 向 UE 300发送 RAN控制信息; 其中, RAN控制信息包括以下任意组合: 有效 WLAN标识; 预定时间 值; 预定门限值; 预定次数值; 加权参数值; 选择可用接入网条件。 其中选 择可用接入网条件与 S207中预置的条件相同。
S305、 UE 300发起 WLAN扫描, 获取 WLAN状态参数;
本步骤与 S205相同, 不再赘述。
S307、 UE 300确定可用接入网络列表, 选取最佳 WLAN接入网络, 或 选取第一个监测到的可用的 WLAN接入网络;
UE根据 RAN节点告知的控制信息, CN节点告知的策略和辅助信息以 及 S305中获得的 WLAN网络的状态参数, 确定可用的接入网络列表, 并从 中选择一个最佳的接入网络执行关联等流程。
选取最佳的 WLAN接入网可以利用上述确定可用接入网列表时使用的 方法, 比较不同的可用 WLAN接入网的状态, 或多种状态的加权值, 选取最 佳的一个。
实施例 3
图 4是本发明实施例 3的具体流程图。
S401、 核心网节点 (CN Node 404 ) 向用户设备 ( UE 400 )发送核心网 策略及辅助信息;
本步骤与 S201相同, 不再赘述。
S403、 接入网节点 ( RAN Node 402 ) 向 UE 400发送 RAN控制信息; 本步骤与 S303相同, 不再赘述。
S405、 UE 400发起 WLAN扫描, 获取 WLAN状态参数;
本步骤与 S205相同, 不再赘述。
S407、 UE 400确定可用接入网络列表;
UE根据 RAN节点告知的控制信息, CN节点告知的策略和辅助信息以 及 S305中获得的 WLAN网络的状态参数, 确定可用的接入网络列表。
S409、 UE 400将可用接入网络列表发送给 RAN Node 402;
UE将确定的可用接入网络列表发送给 RAN Node, 等待 RAN Node做出 最后决策是否允许 UE接入某个 WLAN网络以及接入哪个 WLAN网络。
S4011、 RAN Node 402将决策结果发给 UE 400;
RAN Node根据 S409中获得的可用接入网络列表, 以及自己收到的其他 UE的可用接入列表, 以及从其他途径如共站的 WLAN AP处, 或者其他 UE 上艮的一些关于 WLAN的辅助信息, 统一规划哪些 UE进入某个 WLAN网 络, 哪些 UE进入别的 WLAN网络, 哪些 UE不接入 WLAN网络, 并将最终 的决策结果发给 UE。
这样可以避免多个 UE同时认定某个 WLAN网络为最佳, 并同时接入该 WLAN网络造成该 WLAN网络过载, 使这些 UE无法得到服务, 回到 RAN, 即影响用户体验, 又浪费了资源和 UE的能量。
综上所述, 本发明实施例通过网络侧为 UE配置预定的门限等参数以及 选择可用接入网的条件或者 UE 自己内部预置门限等参数以及选择接入网的 条件, 从而可以保证 UE选择到合适的 WLAN网络, 提高用户体验, 提高网 络的资源利用率, 节省 UE电能。
图 6为本发明实施例的用户设备的示意图, 如图 6所示, 本实施例的用 户设备包括:
监测模块 601 , 其设置成监测无线局域网接入网的状态是否持续满足预 定门限达到预定时间和 /或达到预定次数, 或者监测预定时间内或预定次数的 所述无线局域网接入网的状态经滤波处理后是否满足预定门限;
判定模块 602, 其设置成在所述监测模块监测到满足预定条件的情况下, 认定所述无线局域网接入网为可用接入网络。
在一较佳实施例中,
所述监测模块 601通过如下方式监测所述无线局域网接入网的状态是否 持续满足预定门限达到预定时间和 /或达到预定次数: 监测所述一种或多种无 线局域网接入网的状态是否分别持续满足预定门限达到预定时间和 /或达到 预定次数, 或多种无线局域网接入网的状态经过加权处理后是否持续满足预 定门限达到预定时间和 /或达到预定次数, 或多种状态中的任意一种是否持续 满足预定门限达到预定时间和 /或达到预定次数。
在一较佳实施例中,
所述监测模块 601通过如下方式监测到预定时间内或预定次数的所述无 线局域网接入网的状态经滤波处理后是否满足预定门限: 监测所述无线局域 网接入网的状态在预定时间内的多个时间段的平均值经过加权处理后是否满 足预定门限; 或监测所述无线局域网接入网的状态在连续预定次数个时间段 的平均值经过加权处理后是否满足预定门限; 或监测连续的预定次数的所述 无线局域网接入网的状态经过加权处理后是否满足预定门限。
在一较佳实施例中,
所述监测模块 601通过如下方式监测预定时间内或预定次数的所述无线 局域网接入网的状态经滤波处理后满足预定门限: 监测预定时间内或预定次 数的所述多种无线局域网接入网的状态经过滤波处理后分别是否满足预定门 限, 或者经过滤波后再做加权处理后是否满足预定门限, 或者多种状态中的 任意一种经滤波处理后是否满足预定门限。
其中,所述监测模块 601监测的 WLAN接入网的状态包括以下的一种或 多种:
WLAN接入网的信号强度;
WLAN接入网的接收信号强度与 WLAN接入点发射信号强度的比值;
WLAN接入网的信号的信干噪比;
WLAN接入网的接入网负荷;
WLAN接入网连接到广域网的链路上行负荷;
WLAN接入网连接到广域网的链路下行负荷。
其中, 所述监测模块 601通过测量信标帧或测量导频帧, 或者通过向所 述无线局域网站点发送信标请求或链路测量请求后得到回复的信标报告或者 链路测量报告, 获得所述无线局域网接入网的信号强度的; 通过监听信标帧 或探针响应帧与已掌握的所述无线局域网接入网的信号强度, 获得所述无线 局域网接入网的接收信号强度与无线局域网接入点发射信号强度的比值的; 通过测量信标帧或测量导频帧, 或者通过向所述无线局域网站点发送链路测 量请求后得到回复的链路测量报告, 或者通过向所述无线局域网站点发送噪 声直方图请求后得到回复的噪声直方图报告与已掌握的所述无线局域网接入 网的信号强度, 获得所述无线局域网接入网的信号的信干噪比的; 通过监听 信标帧或探针响应帧, 或者通过向所述无线局域网站点发送信道负荷请求后 得到回复的信道负荷报告, 获得所述无线局域网接入网的接入网负荷的; 通 过监听信标帧或探针响应帧获得所述无线局域网接入网连接到广域网的链路 上行负荷和所述无线局域网接入网连接到广域网的链路下行负荷的。
其中, 所述用户设备还可以包括,
配置模块 603 , 其设置成接受网络侧通过广播或寻呼或专用信令配置, 或者按照协议规定自行设置所述预定门限、 所述预定时间、 所述预定次数和 所述滤波处理的滤波系数。
显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可 以用通用的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布 在多个计算装置所组成的网络上, 可选地, 它们可以用计算装置可执行的程 序代码来实现, 从而, 可以将它们存储在存储装置中由计算装置来执行, 或 者将它们分别制作成各个集成电路模块, 或者将它们中的多个模块或步骤制 作成单个集成电路模块来实现。 这样, 本发明不限制于任何特定的硬件和软 件结合。
以上所述仅为本发明的较佳实施例而已, 并不用于限制本发明, 对于本 领域的技术人员来说, 本发明可以有各种更改和变化。 凡在本发明的精神和 原则之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明的保护 范围之内。
工业实用性 本发明实施例提供一种选择可用接入网络的方法及用户设备, 能够保证
UE选择到一个稳定的 WLAN接入网络, 降低可能产生乒乓选择的风险。

Claims

权 利 要 求 书
1、 一种选择可用接入网络的方法, 包括:
用户设备监测到无线局域网接入网的状态持续满足预定门限达到预定时 间和 /或达到预定次数, 或者监测到预定时间内或预定次数的所述无线局域网 接入网的状态经滤波处理后满足预定门限时, 则认定所述无线局域网接入网 为可用接入网络。
2、 如权利要求 1所述的方法, 其中,
所述用户设备监测到所述无线局域网接入网的状态持续满足预定门限达 到预定时间和 /或达到预定次数, 包括:
所述用户设备监测到所述一种或多种无线局域网接入网的状态分别持续 满足, 或多种无线局域网接入网的状态经过加权处理后持续满足, 或多种状 态中的任意一种持续满足预定门限达到预定时间和 /或达到预定次数。
3、 如权利要求 1所述的方法, 其中, 所述用户设备监测到预定时间内或 预定次数的所述无线局域网接入网的状态经滤波处理后满足预定门限,包括: 所述用户设备监测到所述无线局域网接入网的状态在预定时间内的多个 时间段的平均值经过加权处理后满足预定门限;
或所述用户设备监测到所述无线局域网接入网的状态在连续预定次数个 时间段的平均值经过加权处理后满足预定门限;
或所述用户设备监测到连续的预定次数的所述无线局域网接入网的状态 经过加权处理后满足预定门限。
4、 如权利要求 1所述的方法, 其中,
所述用户设备监测到预定时间内或预定次数的所述无线局域网接入网的 状态经滤波处理后满足预定门限, 包括:
所述用户设备监测到预定时间内或预定次数的所述多种无线局域网接入 网的状态经过滤波处理后分别满足预定门限, 或者经过滤波后再做加权处理 后满足预定门限, 或者多种状态中的任意一种经滤波处理后满足预定门限。
5、 如权利要求 1-4任一项所述的方法, 其中, 所述无线局域网接入网的 状态包括以下的一种或多种:
无线局域网接入网的信号强度;
无线局域网接入网的接收信号强度与无线局域网接入点发射信号强度的 比值;
无线局域网接入网的信号的信干噪比;
无线局域网接入网的接入网负荷;
无线局域网接入网连接到广域网的链路上行负荷; 以及
无线局域网接入网连接到广域网的链路下行负荷。
6、 如权利要求 5所述的方法, 其中:
所述用户设备通过测量信标帧或测量导频帧, 或者通过向所述无线局域 网站点发送信标请求或链路测量请求后得到回复的信标报告或者链路测量报 告, 获得所述无线局域网接入网的信号强度;
所述用户设备通过监听信标帧或探针响应帧与已掌握的所述无线局域网 接入网的信号强度, 获得所述无线局域网接入网的接收信号强度与无线局域 网接入点发射信号强度的比值;
所述用户设备通过测量信标帧或测量导频帧, 或者是通过向所述无线局 域网站点发送链路测量请求后得到回复的链路测量报告, 或者是通过向所述 无线局域网站点发送噪声直方图请求后得到回复的噪声直方图 4艮告与已掌握 的所述无线局域网接入网的信号强度, 获得所述无线局域网接入网的信号的 信干噪比;
所述用户设备通过监听信标帧或探针响应帧, 或者通过向所述无线局域 网站点发送信道负荷请求后得到回复的信道负荷才艮告, 获得所述无线局域网 接入网的接入网负荷; 以及
所述用户设备通过监听信标帧或探针响应帧获得所述无线局域网接入网 连接到广域网的链路上行负荷和所述无线局域网接入网连接到广域网的链路 下行负荷。
7、 如权利要求 1-4任一项所述的方法, 其中: 所述预定门限由网络侧通过广播或寻呼或专用信令配置, 或者由所述用 户设备按照协议规定自行设置。
8、 如权利要求 1-4任一项所述的方法, 其中:
所述预定时间由网络侧通过广播或寻呼或专用信令配置, 或者由所述用 户设备按照协议规定自行设置。
9、 如权利要求 1-4任一项所述的方法, 其中:
所述预定次数由网络侧通过广播或寻呼或专用信令配置, 或者由所述用 户设备按照协议规定自行设置。
10、 如权利要求 1-4任一项所述的方法, 其中:
所述滤波处理的滤波系数由网络侧通过广播或寻呼或专用信令配置, 或 者由所述用户设备按照协议规定自行设置。
11、 如权利要求 2-4任一项所述的方法, 其中:
所述加权处理的加权系数由网络侧通过广播或寻呼或专用信令配置, 或 者由所述用户设备按照协议规定自行设置。
12、 一种用户设备, 包括:
监测模块, 其设置成监测无线局域网接入网的状态是否持续满足预定门 限达到预定时间和 /或达到预定次数, 或者监测预定时间内或预定次数的所述 无线局域网接入网的状态经滤波处理后是否满足预定门限; 以及
判定模块, 其设置成在所述监测模块监测到满足预定条件的情况下, 认 定所述无线局域网接入网为可用接入网络。
13、 如权利要求 12所述的用户设备, 其中:
所述监测模块通过如下方式监测所述无线局域网接入网的状态是否持续 满足预定门限达到预定时间和 /或达到预定次数:
监测所述一种或多种无线局域网接入网的状态是否分别持续满足预定门 限达到预定时间和 /或达到预定次数, 或多种无线局域网接入网的状态经过加 权处理后是否持续满足预定门限达到预定时间和 /或达到预定次数, 或多种状 态中的任意一种是否持续满足预定门限达到预定时间和 /或达到预定次数。
14、 如权利要求 12所述的用户设备, 其中:
所述监测模块通过如下方式监测预定时间内或预定次数的所述无线局域 网接入网的状态经滤波处理后是否满足预定门限:
监测所述无线局域网接入网的状态在预定时间内的多个时间段的平均值 经过加权处理后是否满足预定门限; 或监测所述无线局域网接入网的状态在 连续预定次数个时间段的平均值经过加权处理后是否满足预定门限; 或监测 连续的预定次数的所述无线局域网接入网的状态经过加权处理后是否满足预 定门限。
15、 如权利要求 12所述的用户设备, 其中:
所述监测模块通过如下方式监测预定时间内或预定次数的所述无线局域 网接入网的状态经滤波处理后满足预定门限:
监测预定时间内或预定次数的所述多种无线局域网接入网的状态经过滤 波处理后分别是否满足预定门限, 或者经过滤波后再做加权处理后是否满足 预定门限, 或者多种状态中的任意一种经滤波处理后是否满足预定门限。
16、 如权利要求 12-15所述的用户设备, 其中, 所述监测模块监测到的 无线局域网接入网的状态包括以下的一种或多种:
无线局域网接入网的信号强度;
无线局域网接入网的接收信号强度与无线局域网接入点发射信号强度的 比值;
无线局域网接入网的信号的信干噪比;
无线局域网接入网的接入网负荷;
无线局域网接入网连接到广域网的链路上行负荷; 以及
无线局域网接入网连接到广域网的链路下行负荷。
17、 如权利要求 16所述的用户设备, 其中, 所述监测模块通过如下方式 的一种或多种监测到无线局域网接入网的状态:
测量信标帧或测量导频帧, 或者向所述无线局域网站点发送信标请求或 链路测量请求后得到回复的信标报告或者链路测量报告, 获得所述无线局域 网接入网的信号强度;
监听信标帧或探针响应帧与已掌握的所述无线局域网接入网的信号强 度, 获得所述无线局域网接入网的接收信号强度与无线局域网接入点发射信 号强度的比值;
测量信标帧或测量导频帧, 或者向所述无线局域网站点发送链路测量请 求后得到回复的链路测量报告, 或者向所述无线局域网站点发送噪声直方图 请求后得到回复的噪声直方图报告与已掌握的所述无线局域网接入网的信号 强度, 获得所述无线局域网接入网的信号的信干噪比;
监听信标帧或探针响应帧, 或者向所述无线局域网站点发送信道负荷请 求后得到回复的信道负荷报告, 获得所述无线局域网接入网的接入网负荷; 以及
监听信标帧或探针响应帧获得所述无线局域网接入网连接到广域网的链 路上行负荷和所述无线局域网接入网连接到广域网的链路下行负荷。
18、 如权利要求 12-15所述的用户设备, 还包括,
配置模块, 其设置成接受网络侧通过广播或寻呼或专用信令配置, 或者 按照协议规定自行设置所述预定门限、 所述预定时间、 所述预定次数、 所述 滤波处理的滤波系数以及所述加权处理的加权系数。
PCT/CN2014/073955 2013-05-09 2014-03-24 一种选择可用接入网络的方法及用户设备 WO2014180190A1 (zh)

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US10582448B2 (en) 2020-03-03
CN104144473B (zh) 2019-12-20
JP2016518084A (ja) 2016-06-20
US20160127988A1 (en) 2016-05-05
EP2996403A1 (en) 2016-03-16
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