CN105873115B

CN105873115B - Network resource adjustment method and terminal between access technology networks

Info

Publication number: CN105873115B
Application number: CN201510035479.7A
Authority: CN
Inventors: 贺美芳; 黄河
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2015-01-23
Filing date: 2015-01-23
Publication date: 2021-06-25
Anticipated expiration: 2035-01-23
Also published as: WO2016115868A1; CN105873115A

Abstract

The invention discloses a method for adjusting network resources among access technology networks and a terminal, wherein the terminal is simultaneously accessed into a wireless local area network and at least one 3GPP network (which can be an LTE network or a UMTS network), and realizes shunting by utilizing the wireless local area network; the terminal detects the wireless link of at least one accessed network, and when the wireless link of at least one network is detected to fail, the terminal triggers network resource adjustment (such as network abnormal reporting, rollback or link reconstruction) in time, so that serious data delay and packet loss are avoided, the service quality of a user plane is ensured, and the satisfaction degree of user experience can be improved.

Description

Network resource adjustment method and terminal between access technology networks

Technical Field

The invention relates to the field of communication, in particular to a network resource adjusting method and a terminal between access technology networks.

Background

With the continuous evolution of wireless communication technology and standards, mobile packet services have been developed greatly, and the data throughput of a single terminal is continuously improved. Taking a Long Term Evolution (LTE) system as an example, the data transmission with the downlink maximum rate of 100Mbps can be supported within a 20M bandwidth, and in a subsequent LTE (LTE advanced) system, the data transmission rate will be further improved, even reaching 1 Gbps.

Due to the expansion of terminal data traffic volume, the existing network resources are gradually unconscious, and especially under the condition that a new generation communication technology (such as 3G, LTE) cannot be widely distributed, the user rate and traffic demand cannot be met, and the user experience is worsened. How to prevent and change the situation is a problem which must be considered by operators, and on one hand, the popularization and network deployment of new technologies need to be accelerated; on the other hand, it is desirable to enhance the existing networks and technologies to achieve the goal of rapidly improving network performance. As is well known, in addition to Wireless Network technologies provided by The 3rd Generation Partnership Project (3 GPP), Wireless Local Area Networks (WLANs), especially based on The Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, which are currently in widespread use, have been widely used in home, enterprise, and even internet for hotspot access coverage. Among them, the technical specification proposed by the WiFi Alliance (Wi-Fi Alliance) is most widely used, and thus in practice, WiFi networks are often numbered with WLAN networks based on the IEEE 802.11 standard.

Under the premise, some operators and companies have proposed to merge the WLAN and the existing 3GPP network to implement joint transmission, so as to achieve the purposes of load offloading and improving network performance. The 3GPP SA2 provides a mode for selecting a target Access Network for a terminal according to an operator policy through an Access Network Discovery and Selection Function (ANDSF) scheme.

3GPP R10 defines ANDSF standard, ANDSF is used as access anchor point to realize intelligent network selection, and effective shunting of network access is realized through interactive cooperation of network and terminal, thereby conforming to the operation direction of future multi-network cooperation. The ANDSF makes strategies based on information such as network load, terminal capability, user subscription conditions and the like, helps a terminal user to select an optimal access network system, and achieves collaborative operation of multiple access modes. The ANDSF may be deployed alone or in combination with other network elements. Currently, the industry is in a mainstream view of a scheme that ANDSF can be deployed on PCC devices.

The ANDSF is a WLAN interworking scheme based on a core network, and does not consider an influence on an access network, and in addition, because the ANDSF is a relatively static scheme, it cannot well adapt to a situation that a network load and a channel quality dynamically change, so that a WLAN interworking discussion is also carried out in a 3GPP access network group. In R12WLAN/3GPP wireless interworking, a mechanism to perform rules and triggers for WLAN offloading is introduced.

However, the core network mechanism and the supplementary information mechanism from the radio access network cannot provide the network side with real-time use of load and channel conditions to thereby use radio resources in combination. In addition, data from the same bearer cannot be served over both the 3GPP and WLAN links. The need for WLAN integration with 3GPP networks is therefore re-addressed at the RAN65 for the first time.

Compared with the WLAN offloading scheme depending on policy and trigger, which has been researched at present, the RAN-level aggregated WLAN is integrated with a 3GPP network, which is abbreviated as WLAN and 3GPP network tightly coupled, and similar to carrier aggregation and dual connectivity, provides better control and utilization of resources on dual connectivity for the overall system. Tight integration and aggregation at the radio layer allows more real-time joint scheduling of the radio resources of the WLAN and the 3GPP network, thus improving user QoS and overall system capacity. By better managing the radio resources among the users, the collective throughput of all users can be increased and the overall system capacity provided. Each link scheduling decision can be made to be per packet level based on real-time channel conditions and system usage. The user plane is anchored in a reliable LTE network and performance can be improved by fallback to the LTE network.

The tight coupling between WLAN and 3GPP network can be applied to co-location cooperation scenario (RAN layer integration operation is completed between Enb and AP (wireless access point)) through an internal interface and non-co-location cooperation scenario (RAN layer integration operation is completed between Enb and AP through an external interface), which are essentially similar to 3GPP carrier aggregation and dual connectivity, respectively. The co-location cooperation method is applied to WLAN and 3GPP integrated base station sites as shown in fig. 1, or the WLAN and 3GPP network with ideal loop connection is shown in fig. 2, and the scenario in which the non-co-location cooperation scheme is applied to independent WLAN AP layout in most cases is shown in fig. 3.

There are currently four WLAN offloading schemes for tightly coupling WLANs to 3GPP networks: simplified architecture PDCP (Packet Data Convergence Protocol) layer offload, PDCP layer offload for dual connectivity architecture, RLC (Radio Link Control ) layer offload, and MAC (Media Access Control) layer offload.

The method comprises the steps that the WLAN shunting of downlink data flow is completed on a PDCP layer of a 3GPP access network and then is transmitted to a PDCP adapter, the adapter completes the conversion from a protocol data unit of the PDCP of 3GPP to an MAC protocol data unit of the WLAN, the protocol data unit of the PDCP of the 3GPP is transmitted to the MAC layer of the WLAN of a terminal through a wireless air interface of the WLAN, the MAC protocol data unit of the WLAN is transmitted to the adapter of the PDCP of the terminal, the conversion from the MAC protocol data unit of the WLAN to the protocol data unit of the PDCP is completed on the PDCP adapter of the terminal, the protocol data unit of the PDCP is transmitted to a PDCP entity of a UE, and. The uplink data flow is transmitted from the PDCP entity of the terminal to the PDCP entity of the 3GPP access network, similar to the downlink procedure, but in the opposite direction.

The PDCP layer of the 3GPP access network distributes data flow to a radio link control layer of a small cell of a secondary base station, then distributes downlink data flow for the second time in an MAC of the small cell, namely, a WLAN distributes the data flow to an MAC adapter, the adapter completes the conversion from a protocol data unit of the MAC of 3GPP to an MAC protocol data unit of the WLAN, the data flow is sent to the MAC layer of the WLAN of a terminal through a wireless air interface of the WLAN, then the data flow is sent to the adapter of the MAC of the terminal, the conversion from the MAC protocol data unit of the WLAN to the protocol data unit of the MAC is completed on the adapter of the terminal, the data flow is sent to an MAC entity of the UE, and the user data unit is sent to a corresponding application service according to a 3GPP air interface protocol. The upstream is similar to the downstream process, but in the opposite direction.

The method comprises the steps that so-called RLC layer shunting, WLAN shunting of downlink data flow is completed on an RLC layer of a 3GPP access network and then is transmitted to an RLC adapter, the adapter completes conversion from a protocol data unit of the RLC of 3GPP to an MAC protocol data unit of the WLAN, the protocol data unit of the RLC is transmitted to an MAC layer of a WLAN of a terminal through a wireless air interface of the WLAN and then is transmitted to the adapter of the RLC of the terminal, conversion from the MAC protocol data unit of the WLAN to the protocol data unit of the RLC is completed on the adapter of the terminal and then is transmitted to a PDCP entity of UE, and finally the PDCP entity transmits a service data unit of the PDCP to a corresponding application service. The uplink data flow is transmitted from the PDCP entity of the terminal to the PDCP entity of the 3GPP access network, similar to the downlink procedure, but in the opposite direction.

The method comprises the steps that so-called MAC layer shunting is carried out, WLAN shunting of downlink data flow is completed on an MAC layer of a 3GPP access network and then is transmitted to an MAC adapter, the adapter completes conversion from a protocol data unit of MAC of 3GPP to an MAC protocol data unit of WLAN, the conversion is sent to an MAC layer of WLAN of a terminal through a wireless air interface of the WLAN, the conversion is then sent to the adapter of MAC of the terminal, the conversion from the MAC protocol data unit of WLAN to the protocol data unit of MAC is completed on the adapter of the terminal, the conversion is then sent to a PDCP entity of UE, and finally the PDCP entity sends a service data unit of PDCP to corresponding application services. The uplink data flow is transmitted from the PDCP entity of the terminal to the PDCP entity of the 3GPP access network, similar to the downlink procedure, but in the opposite direction.

The WLAN network is a time-sharing shared network, and there is no mechanism for reporting the status of the WLAN radio link, and when the network link fails due to the conditions of instability of the WLAN side network, poor signal quality, and the like, if the network resources are not adjusted in time, the data is severely delayed and lost, and the service quality of the user plane cannot be guaranteed.

Disclosure of Invention

The invention provides a method and a terminal for adjusting network resources between access technology networks, and solves the problems of serious data delay and packet loss caused by the fact that network resources cannot be adjusted in time according to the network link condition when the existing access technology networks utilize a wireless local area network for shunting.

To solve the above technical problem, the present invention provides a method for adjusting network resources between access technology networks, comprising:

the terminal is accessed to a wireless local area network and at least one 3GPP network simultaneously;

and when the terminal detects that the wireless link of at least one accessed network fails, triggering a network resource adjustment process.

In an embodiment of the present invention, a terminal accesses a wireless local area network and a 3GPP network at the same time, and when the terminal detects that a radio link of one of the accessed networks fails, the adjusting of network resources includes reporting a network exception or reestablishing the radio link; the network with failed radio link is called as a failure network, and the other normal network is a reporting target network;

the network exception reporting comprises:

the terminal reports the radio link failure message of the fault network to the reporting target network;

the radio link re-establishment includes:

the terminal sends a wireless link reestablishment request message to the fault network;

the terminal receives the wireless link reestablishment message fed back by the fault network according to the wireless link reestablishment request message;

and the terminal carries out the wireless link reconstruction of the fault network according to the wireless link reconstruction message.

In an embodiment of the present invention, when the terminal accesses the wireless local area network and at least two 3GPP networks simultaneously, and the terminal detects that a radio link of an accessed network fails, the adjusting of the network resources includes reporting a network exception or reestablishing the radio link; the network with the failed radio link is called a fault network, and other networks are normal networks;

the network exception reporting comprises:

the terminal selects one of the plurality of normal networks as a reporting target network;

the radio link re-establishment includes:

In an embodiment of the present invention, when performing network exception reporting, the selecting, by the terminal, one of the plurality of normal networks as a reporting target network includes:

when the plurality of normal networks comprise the LTE network, the LTE network is selected as a reporting target network;

when the plurality of normal networks do not comprise the LTE network but comprise the UMTS network, selecting the UMTS network as a reporting target network;

or the like, or, alternatively,

selecting a network with the highest reporting priority from the plurality of normal networks as a reporting target network; and the reporting priority of each network is configured in advance.

In an embodiment of the present invention, when reporting a network exception, after a terminal reports a radio link failure message of a failed network to a reporting target network, the method further includes a network rollback procedure, including:

the terminal receives a wireless control resource reconfiguration message fed back by the reporting target network according to the wireless link failure message of the wireless local area network, wherein the wireless control resource reconfiguration message only contains the reporting target network resource information;

and the terminal completes resource reconfiguration and returns to the reporting target network according to the wireless control resource reconfiguration message.

In an embodiment of the present invention, when network fallback is performed, after the terminal completes resource reconfiguration according to the radio control resource reconfiguration message, the terminal further releases a tight coupling resource with the failed network; and/or the reporting target network further releases the tight coupling resource with the fault network after the terminal completes the resource reconfiguration according to the wireless control resource reconfiguration message.

In an embodiment of the present invention, after the terminal reports the radio link failure message of the failed network to the reporting target network, or after the terminal completes resource reconfiguration according to the radio control resource reconfiguration message, the terminal further performs at least one of the following operations:

stopping upstream data transmission in the failed network;

stopping downlink data reception in the failed network;

performing a deregistration operation from the failed network;

releasing resources in the failed network;

deleting the configuration information received from the failed network;

stopping the evaluation of the event measurement and the triggering and reporting of the cell or the wireless access point used when the wireless link in the fault network fails.

In an embodiment of the present invention, a terminal accesses a wireless local area network and at least one 3GPP network at the same time, a main network exists in a plurality of accessed networks, and when a radio link failure of the main network is detected, the network resource adjustment includes radio link reconstruction;

the radio link re-establishment includes:

the terminal sends a wireless link reconstruction request message to the main network with the failed wireless link;

the terminal receives a wireless link reestablishment message fed back by the main network according to the wireless link reestablishment request message;

and the terminal carries out wireless link reconstruction of the main network according to the wireless link reconstruction message.

In an embodiment of the present invention, the terminal accesses to the wireless local area network and at least one 3GPP network simultaneously, and when it is detected that the wireless links of the networks to which the terminal accesses fail, the network resource adjustment includes the wireless link reconstruction;

the radio link re-establishment includes:

the terminal selects one network from the accessed networks as a reconstruction target network;

the terminal sends a wireless link reconstruction request message to the reconstruction target network;

the terminal receives a wireless link reconstruction message fed back by the reconstruction target network according to the wireless link reconstruction request message;

and the terminal carries out the wireless link reconstruction of the reconstruction target network according to the wireless link reconstruction message.

In an embodiment of the present invention, the selecting, by the terminal, one of the plurality of networks accessed as the reestablishment target network includes:

when the network accessed by the terminal comprises an LTE network, selecting the LTE network as a reconstruction target network;

when the network accessed by the terminal does not contain the LTE network but contains the UMTS network, selecting the UMTS network as a reconstruction target network;

or the like, or, alternatively,

selecting a network with the highest reconstruction priority from the accessed multiple networks as a reconstruction target network; the reconstruction priority of each network is configured in advance.

In an embodiment of the present invention, when the terminal detects one or at least two of the following situations of a network accessed by the terminal, the terminal determines that the network has a radio link failure:

the wireless signal strength measurement result in the network is lower than a preset signal strength threshold value in a first preset time period;

detecting that the network is in a synchronization loss state and does not reply within a second preset time period;

a successful data transmission is not completed within a third preset time period;

using RLC entity retransmission corresponding to the service transmitted by the network to reach maximum times;

when the network has a data transmission demand, no resource transmission opportunity is obtained in a fourth preset time period;

the data transmission time delay in the network is greater than a preset delay time threshold.

In order to solve the above problem, the present invention further provides a terminal, including an access module, a detection module, and a processing module:

the access module is used for simultaneously accessing a wireless local area network and at least one 3GPP network;

the detection module is used for detecting whether at least one network accessed by the access module fails in a wireless link;

the processing module is configured to trigger a network resource adjustment process when the detection module detects that at least one network radio link accessed by the access module fails.

In one embodiment of the present invention, the processing module includes a first network exception handling sub-module or a first reconstruction sub-module; the access module is accessed to a wireless local area network and a 3GPP network at the same time, and when the detection module detects that a wireless link of one of the networks accessed by the access module fails, the first network exception handling submodule reports network exception or the first reconstruction submodule reconstructs the wireless link; the network with failed radio link is called as a failure network, and the other normal network is a reporting target network;

the first network exception handling sub-module comprises a first sending sub-unit;

the first sending subunit is configured to report a radio link failure message of the failed network to the reporting target network;

the first reconstruction sub-module comprises a second sending sub-unit, a second receiving sub-unit and a first reconstruction sub-unit;

the second sending subunit is configured to send a radio link reestablishment request message to the faulty network;

the second receiving subunit is configured to receive a radio link reestablishment message fed back by the faulty network according to the radio link reestablishment request message;

the first reestablishment subunit is configured to reestablish the radio link of the failed network according to the radio link reestablishment message.

In an embodiment of the present invention, the first network exception handling sub-module further includes a first receiving sub-unit and a first reconfiguring sub-unit;

the first receiving subunit is configured to receive a radio control resource reconfiguration message fed back by the fallback target network according to the wlan radio link failure message, where the radio control resource reconfiguration message only includes the fallback target network resource information;

the first reconfiguration subunit is configured to complete resource reconfiguration to fallback to the fallback target network according to the radio control resource reconfiguration message.

In one embodiment of the invention, the processing module comprises a second network exception handling sub-module or a second reconstruction sub-module; when the access module is simultaneously accessed to a wireless local area network and at least two 3GPP networks, and the detection module detects that a wireless link of one network accessed by the access module fails, the second network exception handling submodule reports network exceptions or rebuilds a wireless link of the second rebuilding submodule; the network with the failed radio link is called a fault network, and other networks are normal networks;

the second network exception handling sub-module comprises a first selection sub-unit and a third sending sub-unit;

the first selection subunit is configured to select one of the plurality of normal networks as a reporting target network;

the third sending subunit is configured to report a radio link failure message of the failed network to the reporting target network;

the second reconstruction sub-module comprises a fourth sending sub-unit, a fourth receiving sub-unit and a second reconstruction sub-unit;

the fourth sending subunit is configured to send a radio link reestablishment request message to the faulty network;

the fourth receiving subunit is configured to receive a radio link reestablishment message fed back by the faulty network according to the radio link reestablishment request message;

and the second reconstruction subunit is used for reconstructing the wireless link of the fault network according to the wireless link reconstruction message.

In an embodiment of the present invention, the second network exception handling sub-module further includes a third receiving sub-unit and a third repeating sub-unit;

the third receiving subunit is configured to receive a radio control resource reconfiguration message fed back by the fallback target network according to the wlan radio link failure message, where the radio control resource reconfiguration message only includes the fallback target network resource information;

and the third reallocation unit is used for completing resource reallocation and returning to the fallback target network according to the radio control resource reconfiguration message.

In one embodiment of the invention, the processing module comprises a third reconstruction module; the access module is simultaneously accessed to a wireless local area network and at least one 3GPP network, a main network exists in a plurality of accessed networks, and when the detection module detects that a wireless link of the main network fails, the third reconstruction module is used for reconstructing the wireless link;

the third reconstruction sub-module comprises a fifth sending sub-unit, a fifth receiving sub-unit and a third reconstruction sub-unit;

the fifth transmitting subunit is configured to transmit a radio link reestablishment request message to the primary network with a radio link failure;

the fifth receiving subunit is configured to receive a radio link reestablishment message fed back by the main network according to the radio link reestablishment request message;

the third reestablishing subunit is configured to reestablish the wireless link of the primary network according to the wireless link reestablishment message.

In one embodiment of the invention, the processing module comprises a fourth reconstruction submodule; the access module is simultaneously accessed to a wireless local area network and at least one 3GPP network, and when the detection module detects that the wireless links of the networks accessed by the access module fail, the fourth reconstruction sub-module is used for reconstructing the wireless links;

the fourth reconstruction sub-module comprises a second selection sub-unit, a sixth sending sub-unit, a sixth receiving sub-unit and a fourth reconstruction sub-unit;

the second selection subunit is used for selecting one network from the accessed multiple networks as a reconstruction target network;

the sixth sending subunit is configured to send a radio link reestablishment request message to the reestablishment target network;

the sixth receiving subunit is configured to receive a radio link reestablishment message fed back by the reestablishment target network according to the radio link reestablishment request message;

the fourth reestablishing subunit is configured to reestablish the radio link of the reestablishment target network according to the radio link reestablishment message.

The invention has the beneficial effects that:

according to the method and the terminal for adjusting the network resources between the access technology networks, the terminal is simultaneously accessed to a wireless local area network and at least one 3GPP network (which can be an LTE network or a UMTS network), and the wireless local area network is utilized to realize shunting; the terminal detects the wireless link of at least one accessed network, and when the wireless link of at least one network is detected to fail, the terminal triggers network resource adjustment (such as abnormal network wire reporting, network rollback or link reconstruction) in time, so that serious data delay and packet loss are avoided, the service quality of a user plane is ensured, and the satisfaction degree of user experience can be improved.

Drawings

FIG. 1 is a schematic diagram of a WLAN and 3GPP integrated base station site;

FIG. 2 is a schematic diagram of an ideal loop connection WLAN and 3GPP network;

FIG. 3 is a diagram of a scenario of a standalone WLAN AP layout;

fig. 4 is a flowchart illustrating a method for adjusting network resources between access technology networks according to an embodiment of the present invention;

fig. 5 is a flowchart illustrating a network fallback processing according to an embodiment of the present invention;

fig. 6 is a flowchart illustrating a radio link re-establishment according to an embodiment of the present invention;

fig. 7 is a schematic diagram illustrating another network fallback processing flow according to an embodiment of the present invention;

fig. 8 is a flowchart illustrating another radio link re-establishment according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a terminal according to a second embodiment of the present invention;

fig. 10 is a schematic flowchart of a network resource adjustment method in scenario one according to a third embodiment of the present invention;

fig. 11 is a schematic flow chart illustrating a network resource adjustment method in scenario two according to a third embodiment of the present invention;

fig. 12 is a schematic flow chart illustrating a network resource adjustment method in scenario three according to a third embodiment of the present invention;

fig. 13 is a schematic flow chart illustrating a network resource adjustment method in scenario four according to a third embodiment of the present invention;

fig. 14 is a flowchart illustrating a network resource adjustment method in scenario five in the third embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings.

The first embodiment is as follows:

referring to fig. 4, the method for adjusting network resources between access technology networks in this embodiment includes:

step 401: the terminal is simultaneously accessed to a wireless local area network (WLAN network) and at least one 3GPP network (for example, an LTE network or a UMTS (Universal Mobile Telecommunications System: Universal Mobile Telecommunications System) network, etc.), and performs offloading by using the WLAN network;

step 402: the terminal detects a wireless link of at least one accessed network;

step 403: when the terminal detects that at least one network radio link fails, network resource adjustment is carried out, wherein the network resource adjustment comprises network exception reporting (network rollback processing can be carried out after reporting) or link reconstruction processing and the like according to specific application scenes.

In this embodiment, when the terminal detects that one or a combination of at least two of the following conditions occurs in a network to which the terminal is connected, it determines that a radio link failure occurs in the network:

a successful data transmission is not completed within a third preset time period under the network;

The specific setting of each preset time and each threshold value can be flexibly selected and set by combining the detected network type, the specific application scene and other factors.

In this embodiment, the terminal accesses the wireless local area network and a 3GPP network at the same time, and when the terminal detects that the wireless link of one of the accessed networks fails, the network resource adjustment is performed at this time, including network exception reporting or wireless link reestablishment; in this embodiment, after the network exception report is performed, in order to ensure normal transmission of the service data, network rollback processing may be performed immediately. The network with failed radio link is a failure network (the network with failure is a wireless local area network), and the other normal network is a reporting target network (the network is an LTE network);

at this time, please refer to fig. 5 for reporting the network exception and handling the network rollback, which includes:

step 501: the terminal reports a wireless link failure message of a fault network to a reporting target network, and the wireless link failure message can be specifically sent through an uplink air interface message;

step 502: after receiving the radio link failure message, the reporting target network sends a radio control resource reconfiguration message to the terminal, wherein the radio control resource reconfiguration message only contains reporting target network resource information and is mainly used for informing the terminal to return to the reporting target network;

step 503: the terminal receives a wireless control resource reconfiguration message fed back by a reported target network; completing resource reconfiguration according to the radio control resource reconfiguration message and returning to the reporting target network; since the reporting target network (LTE network) is normal and reliable at this time, the fallback to the network can avoid serious data delay and packet loss, and ensure the service quality of the user plane.

In addition to the above network fallback processing, a radio link may be reestablished to avoid serious data delay and packet loss, where the process is shown in fig. 6 and includes:

step 601: the terminal sends a wireless link reestablishment request message to a failed network (for example, assuming that the LTE network fails and the wireless local area network is normal);

step 602: after receiving a wireless link reconstruction request message sent by a terminal, a fault network (LTE network) feeds back the wireless link reconstruction message to the terminal;

step 603: and the terminal receives the radio link reestablishment message fed back by the fault network (such as the LTE network), and carries out the radio link reestablishment of the fault network according to the radio link reestablishment message.

In this embodiment, when the terminal accesses the wireless local area network and at least two 3GPP networks simultaneously, and the terminal detects that a radio link of an accessed network fails, network resource adjustment including network fallback or radio link reestablishment is performed; in this embodiment, after the network exception report is performed, in order to ensure normal transmission of the service data, network rollback processing may be performed immediately. The network with the failed radio link is called a fault network, and other networks are normal networks;

fig. 7 shows a network exception reporting and network rollback processing at this time, including:

step 701: the terminal selects one of the accessed normal networks as a reporting target network (for example, an LTE network is selected as the reporting target network);

step 702: the terminal reports a wireless link failure message of a fault network to a reporting target network, and the wireless link failure message can be specifically sent through an uplink air interface message;

step 703: after receiving the radio link failure message, the reporting target network sends a radio control resource reconfiguration message to the terminal, wherein the radio control resource reconfiguration message only contains reporting target network resource information and is mainly used for informing the terminal to return to the reporting target network;

step 704: the terminal receives a wireless control resource reconfiguration message fed back by a reported target network; completing resource reconfiguration according to the radio control resource reconfiguration message and returning to the reporting target network; since the reporting target network (LTE network) is normal and reliable at this time, the fallback to the network can avoid serious data delay and packet loss, and ensure the service quality of the user plane.

The radio link re-establishment process at this time is the same as the process shown in fig. 6, and will not be described herein.

In step 701, when performing network fallback, the selecting, by the terminal, one of the plurality of normal networks as a reporting target network includes:

alternatively, the first and second electrodes may be,

selecting a network with the highest reporting priority from the plurality of normal networks as a reporting target network; here, the reporting priority of each network is preconfigured, which may be protocol agreement or configured by the eNB.

The rules in this embodiment may be embedded in the terminal in advance, or may be dynamically configured by the system.

In this embodiment, when the reported target network is an LTE network or a UMTS network, the terminal may specifically select any one or more of the following messages to send a radio link failure message of a failed network:

● measurement report

● radio link failure indication

● radio link reconfiguration request (for requesting reporting of the target network to reconfigure traffic from the failed network back to the reporting target network).

In this embodiment, when the terminal reports the radio link failure message of the failed network, the radio link failure message may include a specific cause value of the failure and/or a measurement result of the terminal on the failed network; specifically, the radio link failure message may include a combination of one or more of the following information:

● radio link failure indication

● reason for failure

●SSID

●BSSID

●RB ID

●UE ID

●MAC

●AID

The failure reason matches with a rule that the terminal detects whether a radio link of the network has failed.

In this embodiment, when the terminal reports a network anomaly, and after the terminal reports a radio link failure message of a failed network to a target network, the terminal may perform at least one of the following operations:

● there is no stop on upstream data transmission in the failed network;

● stopping downstream data reception in the failed network;

● performing a deregistration operation from the failed network;

● releasing resources in the failed network;

● deleting the configuration information received from the failed network;

● stopping event measurement evaluation and trigger reporting for cells or radio access points used when radio links fail in the faulty network;

● no additional action is taken and waiting for reporting to the target network for reconfiguration.

When the terminal carries out network rollback, after the terminal reports a radio link failure message of a fault network to a reporting target network, the terminal can not carry out additional operation, and after the terminal completes resource reconfiguration according to the radio control resource reconfiguration message, the terminal carries out at least one of the following operations:

● there is no stop on upstream data transmission in the failed network;

● stopping downstream data reception in the failed network;

● performing a deregistration operation from the failed network;

● releasing resources in the failed network;

● deleting the configuration information received from the failed network;

● stop event measurement evaluation and trigger reporting for cells or radio access points used when radio links fail in the failed network.

In this embodiment, when the terminal performs network fallback, after the terminal completes resource reconfiguration according to the radio control resource reconfiguration message, the method further includes that the terminal releases a tightly coupled resource with the failed network (for example, when the failed network is a wireless local area network, the tightly coupled resource includes IP address binding); and/or reporting the target network (e.g. LTE network), after the terminal completes the resource reconfiguration according to the radio control resource reconfiguration message (specifically, the terminal can determine through the resource reconfiguration completion message fed back by the terminal), further releasing the tightly coupled resource with the failed network (when the target network is the LTE network, the tightly coupled resource includes an IP and/or a MAC address and/or an AID bundle).

In this embodiment, when the terminal simultaneously accesses the wireless local area network and at least one 3GPP network, and a main network is divided from a plurality of accessed networks, and the terminal detects that a wireless link of the main network fails, the network resource adjustment includes wireless link reconstruction, and the reconstruction process includes:

the terminal sends a wireless link reconstruction request message to a main network with a failed wireless link;

the terminal receives a wireless link reconstruction message fed back by a main network according to the wireless link reconstruction request message;

and the terminal carries out the wireless link reconstruction of the main network according to the wireless link reconstruction message.

In this embodiment, the terminal accesses the wireless local area network and at least one 3GPP network simultaneously, at this time, the primary network and the secondary network are not divided among the multiple accessed networks, and when the terminal detects that the radio links of the networks accessed by the terminal all fail, the network resource adjustment includes radio link reestablishment, where the reestablishment process is shown in fig. 8, and includes:

step 801: the terminal selects one network from the accessed networks as a reconstruction target network;

step 802: the terminal sends a wireless link reconstruction request message to a reconstruction target network;

step 803: the terminal receives a wireless link reconstruction message fed back by a reconstruction target network according to the wireless link reconstruction request message;

step 804: and the terminal carries out wireless link reconstruction of the reconstructed target network according to the wireless link reconstruction message.

In step 801, the selecting, by the terminal, one network from the multiple accessed networks as a target network for reconstruction includes:

alternatively, the first and second electrodes may be,

selecting a network with the highest reconstruction priority from the accessed multiple networks as a reconstruction target network; here, the reestablishment priority of each network is preconfigured, which may be protocol agreement or configured by the eNB.

It should be understood that the network fallback and link reestablishment scheme shown in this embodiment is applicable to all WLAN offloading schemes in which the WLAN is tightly coupled to the 3GPP network, and in particular, it is applicable to simplified architecture PDCP layer offloading, PDCP layer offloading of dual connectivity architecture, RLC layer offloading, and MAC layer offloading.

It should be understood that, those skilled in the art will understand that all or part of the steps in the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, and the program may be stored in a computer-readable storage medium, such as: ROM/RAM, magnetic disk, optical disk, etc.

Example two:

referring to fig. 9, the present embodiment further provides a terminal, which includes an access module 1, a detection module 2, and a processing module 3:

the access module 1 is used for simultaneously accessing a wireless local area network (WLAN network) and at least one 3GPP network (for example, an LTE network or a UMTS network, etc.), and performs offloading by using the WLAN network;

the detection module 2 is used for detecting whether at least one network accessed by the access module 1 fails in a wireless link;

the processing module 3 is configured to trigger network resource adjustment when the detection module 2 detects that at least one network radio link accessed by the access module 1 fails. The network resource adjustment here includes network exception reporting or link reconstruction processing and the like according to a specific application scenario. After the network exception reporting processing, the network rollback processing can be carried out to find the normal transmission of the data.

In this embodiment, when the detection module 2 detects that one or a combination of at least two of the following conditions occurs in a network accessed by the access module, it determines that the radio link fails:

In an example of this embodiment, the processing module 3 includes a first network exception handling sub-module or a first rebuilding sub-module; the access module 1 is accessed to a wireless local area network and a 3GPP network at the same time, and when the detection module 2 detects that a wireless link of one of the networks accessed by the access module 1 fails, the first network exception handling submodule reports network exceptions and can carry out network rollback processing after reporting the network exceptions, or the first reconstruction submodule rebuilds the wireless link; the network with failed radio link is called as a failure network, and the other normal network is a reporting target network;

the first network exception handling sub-module comprises a first sending sub-unit, a first receiving sub-unit and a first reconfiguration sub-unit;

the first sending subunit is configured to report a radio link failure message of the failed network to the reporting target network, and specifically may send the radio link failure message through an uplink air interface message;

the first receiving subunit is configured to receive a radio control resource reconfiguration message fed back by the reporting target network according to the radio link failure message of the wireless local area network, where the radio control resource reconfiguration message only includes reporting target network resource information, and is mainly used to notify the terminal to fall back to the reporting target network;

the first reconfiguration subunit is configured to complete resource reconfiguration according to the radio control resource reconfiguration message and return to the reporting target network, and because the reporting target network is normal and reliable at this time, the return to the network may avoid serious data delay and packet loss, and ensure the service quality of the user plane.

the second sending subunit is configured to send a radio link reestablishment request message to a failed network (for example, assuming that the LTE network fails and the wireless local area network is normal);

the second receiving subunit is used for receiving a radio link reestablishment message fed back by a fault network (LTE network) according to the radio link reestablishment request message;

the first reestablishment subunit is used for carrying out wireless link reestablishment of a failure network (LTE network) according to the wireless link reestablishment message.

In another example of the present embodiment, the processing module 3 includes a second network exception handling sub-module or a second reconstruction sub-module; when the access module 1 is simultaneously accessed to a wireless local area network and at least two 3GPP networks, and the detection module 2 detects that a wireless link of one network accessed by the access module 1 fails, the second network exception handling submodule reports network exceptions and then carries out network rollback processing, or reestablishes the wireless link of the second reestablishing submodule; the network with the failed radio link is called a fault network, and other networks are normal networks;

the second network exception handling sub-module comprises a first selection sub-unit, a third sending sub-unit, a third receiving sub-unit and a third repeating sub-unit;

the first selection subunit is used for selecting one of the plurality of normal networks as a reporting target network;

the third receiving subunit is configured to receive a radio control resource reconfiguration message fed back by the reporting target network according to the radio link failure message of the wireless local area network, where the radio control resource reconfiguration message only includes the reporting target network resource information;

and the third reallocation sub-unit is used for completing resource reallocation and returning to the reporting target network according to the wireless control resource reallocation message.

The first selecting subunit selects one of the plurality of normal networks as a reporting target network, and comprises:

alternatively, the first and second electrodes may be,

the fourth sending subunit is configured to send a radio link reestablishment request message to the failed network;

the fourth receiving subunit is configured to receive a radio link reestablishment message fed back by the failure network according to the radio link reestablishment request message;

In this embodiment, when the reported target network is an LTE network or a UMTS network, the radio link failure message may be specifically sent through any one or more of the following messages:

● measurement report

● radio link failure indication

In this embodiment, the reported radio link failure message may include a specific cause value of the failure and/or a measurement result of the terminal on the faulty network; specifically, the radio link failure message may include a combination of one or more of the following information:

● radio link failure indication

● reason for failure

●SSID

●BSSID

●RB ID

●UE ID

●MAC

●AID

In this embodiment, when the terminal reports a network anomaly, after reporting a radio link failure message of a failed network on a target network, the terminal may perform at least one of the following operations:

● there is no stop on upstream data transmission in the failed network;

● stopping downstream data reception in the failed network;

● performing a deregistration operation from the failed network;

● releasing resources in the failed network;

● deleting the configuration information received from the failed network;

When the terminal carries out network rollback, after reporting a radio link failure message of a fault network to a reporting target network, the terminal can also carry out at least one of the following operations without carrying out additional operation after completing resource reconfiguration according to a radio control resource reconfiguration message:

● there is no stop on upstream data transmission in the failed network;

● stopping downstream data reception in the failed network;

● performing a deregistration operation from the failed network;

● releasing resources in the failed network;

● deleting the configuration information received from the failed network;

In this embodiment, when the terminal performs network fallback, the processing module 3 of the terminal completes resource reconfiguration according to the radio control resource reconfiguration message, and further releases a tightly coupled resource with the failed network (for example, when the failed network is a wireless local area network, the tightly coupled resource includes IP address binding); and/or reporting the target network (e.g. LTE network), after the terminal completes the resource reconfiguration according to the radio control resource reconfiguration message (specifically, the terminal can determine through the resource reconfiguration completion message fed back by the terminal), further releasing the tightly coupled resource with the failed network (when the target network is the LTE network, the tightly coupled resource includes an IP and/or a MAC address and/or an AID bundle).

In one example of the present embodiment, the processing module 3 includes a third reconstruction module; the access module 1 is simultaneously accessed to a wireless local area network and at least one 3GPP network, a main network exists in a plurality of accessed networks, and when the detection module 2 detects that a wireless link of the main network fails, the third reconstruction module is used for reconstructing the wireless link;

the fifth sending subunit is configured to send a wireless link reestablishment request message to the primary network with a wireless link failure;

the fifth receiving subunit is configured to receive a wireless link reestablishment message fed back by the main network according to the wireless link reestablishment request message;

and the third reconstruction subunit is used for reconstructing the wireless link of the main network according to the wireless link reconstruction message.

In an example of the present embodiment, the processing module 3 includes a fourth reconstruction submodule; the access module 1 is simultaneously accessed to a wireless local area network and at least one 3GPP network, a plurality of accessed networks are not divided into a primary network and a secondary network at the moment, and when the detection module 2 detects that wireless links of all the networks accessed by the access module 1 fail, the fourth reconstruction submodule is used for reconstructing the wireless links;

specifically, the fourth reconstruction sub-module includes a second selection sub-unit, a sixth sending sub-unit, a sixth receiving sub-unit and a fourth reconstruction sub-unit;

and the fourth reconstruction subunit is used for reconstructing the wireless link of the target network according to the wireless link reconstruction message.

The second selecting subunit selects one network from the plurality of networks accessed by the access module 1 as a target network for reconstruction, and includes:

when the network accessed by the access module 1 comprises an LTE network, the LTE network is selected as a reconstruction target network;

when the network accessed by the access module 1 does not contain the LTE network but contains the UMTS network, the UMTS network is selected as a reconstruction target network;

alternatively, the first and second electrodes may be,

selecting a network with the highest reconstruction priority from a plurality of networks accessed by the access module 1 as a reconstruction target network; here, the reestablishment priority of each network is preconfigured, which may be protocol agreement or configured by the eNB.

It will be apparent to those skilled in the art that the modules, units or steps described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed over a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different from that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

Example three:

the embodiment of the present invention takes a tight coupling between an LTE (Long Term Evolution) system and a WLAN as an example for explanation, and the implementation principle of the technical solution provided by the embodiment of the present invention is the same for the UMTS system.

In the embodiment of the invention, the terminal UE is positioned at a WLAN/LTE integrated base station site, and both the UE and the integrated base station site support a WLAN shunt scheme of tight coupling of LTE and WLAN. The same applies to scenarios such as ideal connection between WLAN and 3GPP network, tight coupling of dual-connected small cells with WLAN, etc.

According to the difference between the WLAN offloading positions of the 3GPP access network and the WLAN tightly coupled, the following further illustrates the present invention on the assumption that the four WLAN offloading schemes described in the background are respectively used as the premise.

Scene one:

in this scenario, a simplified PDCP layer offloading scheme is used, the UE maintains connection with both RAT1(WLAN network) and RAT2(LTE network), and the radio link failure reporting and fallback processing procedures of the self-release of resources of the tight coupling system are shown in fig. 10, and include:

step 1001: the UE fails the radio link under RAT1 according to a certain judgment rule;

the judgment rule comprises one or more of the following rules:

the radio signal strength measurement under RAT1 is below a preset signal strength threshold for a first preset time period;

detecting a synchronization lost state under RAT1 with no reply within a second preset time period;

a successful data transfer is not completed within a third preset time period under ART 1;

the RLC entity retransmission corresponding to the service transmitted by using the RAT1 reaches the maximum number;

when there is a data transmission need in the RAT1, no resource transmission opportunity is obtained within a fourth preset time period;

the data transfer time delay in RAT1 is greater than a preset delay time threshold.

Step 1002: the radio resource control layer of the UE sends the RAT2 uplink air interface message containing the radio link failure message of the UE to the RAT2 side;

the radio link failure message contains a combination of one or more of the following information:

● radio link failure indication

● reason for failure

●SSID

●BSSID

●RB ID

●UE ID

●MAC

●AID

Wherein the failure reason is consistent with the judgment basis.

The RAT2 uplink air interface message in this example may specifically be a radio link failure indication, a measurement report, or a new radio link reconfiguration request.

Step 1003: after the UE reports the radio link failure message in RAT2, the UE takes one or more of the following actions in RAT 1:

stopping uplink data transmission in RAT 1;

stopping downlink data reception in RAT 1;

the UE performs a de-registration operation from the RAT 1;

the UE releases resources in RAT 1;

the UE deletes the relevant configuration information received from RAT 1;

the UE stops the event measurement evaluation and the trigger report of the cell or the AP used when the radio link in the RAT1 fails;

step 1004: after the RAT2 side (e.g., LTE network) receives the radio link failure message from the UE, the RRC of RAT2 sends a radio control resource reconfiguration message to the UE;

the rrc resource reconfiguration message primarily allows the UE to fall back to RAT2, and only carries RAT2 network resources.

Step 1005: and the UE receives the radio control resource reconfiguration message, reconfigures the resources and then sends a radio control resource reconfiguration completion message to the network side.

Wherein, the resource reconfiguration adopts the following operations:

the radio control resource reconfiguration message includes RAT2 network configuration information, and the UE configures RAT2 network resources.

Step 1006: the network side of the RAT2 sends an unloading release indication to the RAT1 side;

wherein, the network side of RAT2 releases the resource related to the UE tight coupling, or releases the resource related to the UE tight coupling after receiving the response message of RAT1 side.

Step 1007: the RAT1 side receives the indication of the offload release, the RAT1 side releases some resources related to the UE, such as IP addresses, and then the RAT1 side returns an offload release complete message to the RAT2 network side.

Scene two:

in this scenario, a dual connectivity architecture PDCP layer offload is used as an application scenario, and the UE maintains connectivity with a RAT1(WLAN network) and a RAT2(LTE network), where the radio link failure reporting and backoff processing procedures of the self-release of the resources of the tight coupling system are shown in fig. 11, and include:

step 1101: the UE fails the radio link under RAT1 according to a certain judgment rule;

the judgment rule refers to the rule of step 1001;

step 1102: the radio resource control layer of the UE sends the radio link failure message containing the UE to the network side of the RAT2 through an uplink air interface message of the RAT 2;

the radio link failure message contains a content reference scenario one;

the RAT2 uplink air interface message in this example may also be specifically a radio link failure indication, a measurement report, or a new radio link reconfiguration request.

After the UE reports the radio link failure message to the network side, the UE waits for the RAT2 network side to perform reconfiguration without performing additional operations

Step 1103: the RAT2 network side RRC sends a radio control resource reconfiguration message to the UE;

the radio control resource reconfiguration message mainly enables the UE to fall back to the RAT2 network, and the specific operation may carry RAT2 network resource and WLAN network resource removal indication;

step 1104: the UE receives the wireless control resource reconfiguration message, performs resource reconfiguration, and then sends a wireless control resource reconfiguration completion message to the RAT2 network side;

wherein, the resource reconfiguration adopts the following operations:

the radio control resource reconfiguration message comprises 3GPP network configuration information, and the UE performs the configuration of the 3GPP network resources;

the radio control resource reconfiguration message further includes an instruction to remove WLAN network resources, and the UE releases resources in the WLAN, specifically releases the WLAN resources by adopting one or more combinations of the following operations:

stopping uplink data transmission in RAT 1;

stopping downlink data reception in RAT 1;

the UE releases resources in RAT 1;

the UE deletes the relevant configuration information received from RAT 1;

step 1105: UE initiates a de-registration instruction to the RAT1 side;

step 1106: the RAT1 side returns the deregistration completion to the UE side;

step 1107: the network side of the RAT2 sends an unloading release indication to the RAT1 side;

step 1108: and the network side of the RAT1 returns the completion of the unloading release to the network side of the RAT 2.

Scene three:

the scenario uses the MAC layer offloading scheme, and when the UE is connected to RAT1(WLAN network) and RAT2(LTE network) and RAT3(UMTS network) at the same time, the radio link failure reporting and fallback processing procedures of the self-release of the resources of the tight coupling system are shown in fig. 12, and include:

step 1201: the UE fails the radio link under RAT1 according to a certain judgment rule; the specific judgment rule refers to step 1001.

Step 1202: the UE selects the RAT used for reporting the RAT1 radio link failure message according to a preset rule, wherein the selection is RAT2, and then the RAT1 radio link failure message is transmitted to a RAT2 network side through an uplink air interface message of a RAT2 network;

wherein, the above rules can be one or more of the following rules:

when LTE is included in RATs other than RAT1, LTE reporting is used

When the RATs used except RAT1 do not include LTE but include UMTS, UMTS is used for reporting.

The rules may be pre-built in the UE or may be configured by the system.

Step 1203: the radio resource control layer of the UE sends the RAT2 uplink air interface message containing the radio link failure message of the UE to the RAT2 side;

● radio link failure indication

● reason for failure

●SSID

●BSSID

●RB ID

●UE ID

●MAC

●AID

Wherein the failure reason is consistent with the judgment basis.

Step 1204: after the UE reports the radio link failure message in RAT2, the UE takes one or more of the following actions in RAT 1:

stopping uplink data transmission in RAT 1;

stopping downlink data reception in RAT 1;

the UE performs a de-registration operation from the RAT 1;

the UE releases resources in RAT 1;

the UE deletes the relevant configuration information received from RAT 1;

step 1205: after the RAT2 side (e.g., LTE network) receives the radio link failure message from the UE, the RRC of RAT2 sends a radio control resource reconfiguration message to the UE;

Step 1206: the UE receives the wireless control resource reconfiguration message, performs resource reconfiguration and then sends a wireless control resource reconfiguration completion message to the network side;

wherein, the resource reconfiguration adopts the following operations:

Step 1207: the network side of the RAT2 sends an unloading release indication to the RAT1 side;

Step 1208: the RAT1 side receives the indication of the offload release, the RAT1 side releases some resources related to the UE, such as IP addresses, and then the RAT1 side returns an offload release complete message to the RAT2 network side.

Scene four:

the scenario uses a simplified architecture RLC layer offloading scheme, and the UE maintains connection with both RAT1(WLAN network) and RAT2(LTE network), that is, the UE is attached to a coupled system of RAT1 and RAT2, and RAT1 and RAT2 have no primary and secondary points; the UE detects that radio link failure occurs in both RAT1 and RAT2, and the processing procedure at this time is shown in fig. 13:

step 1301: the UE determines that the radio link between RAT1 and RAT2 fails according to a rule, which refers to the rule of step 1001;

step 1302: the UE selects the RAT2 as the RAT of the wireless link reconstruction;

wherein the rule is as follows:

when the RAT used by the UE comprises LTE, the wireless link of the LTE is rebuilt

When the RAT used by the UE does not contain LTE but contains UMTS, the radio link of the UMTS is rebuilt

Step 1303: the UE sends a radio link reestablishment request message to the RAT2 network side;

step 1304: the RAT2 network side feeds back a radio link reestablishment message to the UE;

step 1305: and the UE receives the radio link reestablishment message fed back by the RAT2 network, and performs radio link reestablishment of the RAT2 network according to the radio link reestablishment message.

Scene five:

the scenario also uses a reduced architecture RLC layer offloading scheme, where the UE maintains connection with both RAT1(WLAN network) and RAT2(LTE network), i.e. the UE is attached to a coupled system of RAT1 and RAT2, and RAT2 is the primary RAT; when the UE detects that the RAT2 has a radio link failure, please refer to fig. 14 for the processing procedure at this time:

step 1401: the UE determines that the radio link of the RAT2 fails according to a certain rule, where the determination rule refers to the rule in step 1001;

step 1402: the UE stops data transmission in RAT1 and RAT2 at the same time;

step 1403: the UE sends a radio link reestablishment request message to the RAT2 network side;

step 1404: the RAT2 network side feeds back a radio link reestablishment message to the UE;

step 1405: and the UE receives the radio link reestablishment message fed back by the RAT2 network, and performs radio link reestablishment of the RAT2 network according to the radio link reestablishment message.

The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, and the practice of the invention is not to be considered limited to those descriptions. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims

1. A method for adjusting network resources between access technology networks is characterized by comprising the following steps:

when detecting that the radio link of at least one network accessed by the terminal fails, the terminal triggers a network resource adjustment process, wherein the network resource adjustment comprises network exception reporting, and when the network exception reporting is carried out, the terminal reports the radio link failure message of a failure network to a reporting target network, and then the terminal further comprises a network rollback process, which comprises the following steps:

2. The method of claim 1, wherein the terminal accesses a wlan and a 3GPP network simultaneously, and when the terminal detects a radio link failure of one of the accessed networks, the network resource adjustment includes abnormal network reporting or radio link reestablishment; the network with failed radio link is called as a failure network, and the other normal network is a reporting target network;

the network exception reporting comprises:

the radio link re-establishment includes:

3. The method according to claim 1, wherein when the terminal accesses the wlan and at least two 3GPP networks simultaneously and the terminal detects that the radio link of the accessed network fails, the network resource adjustment includes abnormal network reporting or radio link reestablishment; the network with the failed radio link is called a fault network, and other networks are normal networks;

the network exception reporting comprises:

the terminal selects one of the normal networks as a reporting target network;

the radio link re-establishment includes:

4. The method of claim 3, wherein when performing network exception reporting, the terminal selecting one of the normal networks as a reporting target network comprises:

when the normal network comprises an LTE network, selecting the LTE network as a reporting target network;

when the normal network does not comprise an LTE network but comprises a UMTS network, selecting the UMTS network as a reporting target network;

or the like, or, alternatively,

selecting a network with the highest reporting priority from the normal networks as a reporting target network; the reporting priority of each network is configured in advance.

5. The method for adjusting network resources between access technology networks according to any one of claims 1-4, wherein, when network fallback is performed, after the terminal completes resource reconfiguration according to the radio control resource reconfiguration message, the method further comprises releasing tightly coupled resources with the failed network; and/or the reporting target network further releases the tight coupling resource with the fault network after the terminal completes the resource reconfiguration according to the wireless control resource reconfiguration message.

6. The method as claimed in any of claims 1-4, wherein after the terminal reports the radio link failure message of the failed network to the reporting target network, or after the terminal completes resource reconfiguration according to the radio control resource reconfiguration message, the terminal further performs at least one of the following operations:

stopping upstream data transmission in the failed network;

stopping downlink data reception in the failed network;

performing a deregistration operation from the failed network;

releasing resources in the failed network;

deleting the configuration information received from the failed network;

7. The method according to claim 1, wherein the terminal accesses the wlan and at least one 3GPP network simultaneously, a main network exists in the accessed networks, and the network resource adjustment includes re-establishment of a radio link when a radio link failure of the main network is detected;

the radio link re-establishment includes:

8. The method according to claim 1, wherein the terminal accesses a wireless local area network and at least one 3GPP network simultaneously, and the network resource adjustment includes re-establishment of a radio link when detecting that the radio link of each network accessed by the terminal fails;

the radio link re-establishment includes:

9. The method of claim 8, wherein the terminal selecting one of the plurality of networks as the target network for re-establishment comprises:

or the like, or, alternatively,

10. The method for network resource adjustment between access technology networks according to any of claims 1-4 and 7-9, wherein the terminal determines that a radio link failure occurs in a network to which the terminal accesses when one or at least two of the following conditions occur in the network:

11. A terminal is characterized by comprising an access module, a detection module and a processing module:

the processing module is used for triggering a network resource adjusting process when the detection module detects that at least one network radio link accessed by the access module fails, wherein the network resource adjusting process comprises network exception reporting;

the first network exception handling sub-module comprises a first receiving sub-unit and a first reconfiguration sub-unit;

the first receiving subunit is configured to receive a radio control resource reconfiguration message fed back by the reporting target network according to the radio link failure message of the wlan, where the radio control resource reconfiguration message only includes resource information of the reporting target network;

the first reconfiguration subunit is configured to complete resource reconfiguration according to the radio control resource reconfiguration message and return to the reporting target network.

12. The terminal of claim 11, wherein the processing module includes a first network exception handling sub-module or a first reconstruction sub-module; the access module is accessed to a wireless local area network and a 3GPP network at the same time, and when the detection module detects that a wireless link of one of the networks accessed by the access module fails, the first network exception handling submodule reports network exception or the first reconstruction submodule reconstructs the wireless link; the network with failed radio link is called as a failure network, and the other normal network is a reporting target network;

13. The terminal of claim 11, wherein the processing module includes a second network exception handling sub-module or a second reconstruction sub-module; when the access module is simultaneously accessed to a wireless local area network and at least two 3GPP networks, and the detection module detects that a wireless link of one network accessed by the access module fails, the second network exception handling submodule reports network exceptions or rebuilds a wireless link of the second rebuilding submodule; the network with the failed radio link is called a fault network, and other networks are normal networks;

the first selection subunit is used for selecting one of the normal networks as a reporting target network;

14. The terminal of claim 13, wherein the second network exception handling sub-module further comprises a third receiving sub-unit and a third repeating sub-unit;

the third receiving subunit is configured to receive a radio control resource reconfiguration message fed back by the reporting target network according to the radio link failure message of the wlan, where the radio control resource reconfiguration message only includes the reporting target network resource information;

and the third reallocation subunit is configured to complete resource reallocation according to the radio control resource reallocation message and fallback to the reporting target network.

15. The terminal of claim 11, wherein the processing module includes a third reconstruction module; the access module is simultaneously accessed to a wireless local area network and at least one 3GPP network, a main network exists in a plurality of accessed networks, and when the detection module detects that a wireless link of the main network fails, the third reconstruction module is used for reconstructing the wireless link;

16. The terminal of claim 11, wherein the processing module includes a fourth reconstruction sub-module; the access module is simultaneously accessed to a wireless local area network and at least one 3GPP network, and when the detection module detects that the wireless links of the networks accessed by the access module fail, the fourth reconstruction sub-module is used for reconstructing the wireless links;