WO2013010500A1 - 数据分流的方法以及用户设备 - Google Patents
数据分流的方法以及用户设备 Download PDFInfo
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- WO2013010500A1 WO2013010500A1 PCT/CN2012/078956 CN2012078956W WO2013010500A1 WO 2013010500 A1 WO2013010500 A1 WO 2013010500A1 CN 2012078956 W CN2012078956 W CN 2012078956W WO 2013010500 A1 WO2013010500 A1 WO 2013010500A1
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- data
- offloading
- pdu
- user equipment
- configuration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0231—Traffic management, e.g. flow control or congestion control based on communication conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
Definitions
- the embodiments of the present invention relate to the field of communications, and in particular, to a method for performing data offloading in a wireless communication network and a user equipment for implementing data offloading.
- LTE Long Term Evolution
- 3.9G Long Term Evolution
- LTE research includes some areas that are generally considered important, such as reduced latency, higher user data rates, improved system capacity and coverage, and lower operating costs.
- 3GPP 3rd Generation Partnership Program
- OFDM/FDMA Orthogonal Frequency Division Multiplexing/Frequency Division Multiple Access
- the core technology can be regarded as “quasi 4G” technology.
- the main performance objectives of the 3GPP LTE project include: Provides downlink 100Mbps and uplink 50Mbps peak rate in 20MHz spectrum bandwidth; improves cell edge user performance; improves cell capacity; Delay, the unidirectional transmission delay of the user plane is less than 5ms, the migration time of the control plane from sleep state to active state is less than 50ms, and the migration time from the resident state to the active state is less than 100ms; the cell coverage of 100km radius is supported; 350km/h high-speed mobile users provide access services greater than 100kbps; support paired or unpaired spectrum, and flexible configuration of multiple bandwidths from 1.25 MHz to 20 MHz.
- WLAN Wireless Local Area Networks
- WiFi Wireless Fidelity
- An AP is generally called a network bridge or access point. It is used as a bridge between a traditional wired local area network and a wireless local area network. Therefore, any user terminal equipped with a wireless network card can share the wired local area network through the AP.
- Even the resources of a wide area network work as a HUB or router with a built-in wireless transmitter, while a wireless network card is a client device responsible for receiving signals transmitted by the AP.
- the air interface adopts LTE technology and is implemented by deploying an eNodeB (evolved Node B).
- eNodeB evolved Node B
- the UE User Equipment
- the user equipment can only transmit through the LTE air interface of the eNodeB to which the network belongs.
- Embodiments of the present invention provide a method for performing data offloading in a wireless communication network and a user equipment for implementing the data offloading method, which can support LTE load offloading.
- the embodiment of the present invention provides a data offloading method, including: receiving, by a base station, offload configuration signaling indicating a traffic off configuration, performing traffic off configuration according to the offload configuration signaling; and configuring data according to the offloading configuration Divide.
- an embodiment of the present invention provides a data offloading method, including: generating a offloading configuration signaling indicating that a wireless network offloading configuration is performed; and transmitting the offloading configuration signaling to a user equipment.
- the embodiment of the present invention provides a user equipment, including: a traffic distribution control unit, configured to receive a traffic distribution configuration signaling that is sent by a base station to perform a wireless network offload configuration, and perform a traffic distribution configuration according to the traffic distribution configuration signaling; And an adaptation layer unit, configured to offload data according to the offloading configuration.
- a traffic distribution control unit configured to receive a traffic distribution configuration signaling that is sent by a base station to perform a wireless network offload configuration, and perform a traffic distribution configuration according to the traffic distribution configuration signaling
- an adaptation layer unit configured to offload data according to the offloading configuration.
- the data transmitted in the LTE air interface can be offloaded to other available access technologies, thereby meeting the increasing mobile bandwidth requirement and making up for the LTE air interface transmission bandwidth.
- FIG. 1 is a schematic diagram of a WLAN offload control plane network architecture to which an embodiment of the present invention may be applied.
- 2 is a flow chart of a method for data splitting at a base station side according to an embodiment of the present invention.
- FIG. 3 is a schematic diagram of a control plane protocol stack associated with an embodiment of the present invention.
- FIG. 4 is a flow chart of a method for data splitting at a base station side according to an embodiment of the present invention.
- FIG. 5 is a structural diagram of an adaptation layer implementing a data offloading method according to an embodiment of the present invention.
- Figure 6 is a schematic block diagram of a user equipment having data offload capabilities in accordance with one embodiment of the present invention.
- FIG. 7 is a schematic block diagram of a user equipment having data offload capability according to another embodiment of the present invention. Mode for carrying out the invention
- wireless LAN communication modules such as WiFi modules.
- WiFi modules such as WiFi modules.
- existing wireless cellular communication systems are subject to increasing pressure on data traffic.
- One possible approach is to integrate wireless cellular technology and wireless access technologies, for example, by using WLAN to offload data traffic from mobile cellular communication systems, thereby greatly improving the experience of cellular system users.
- FIG. 1 is a schematic diagram of a WLAN offload control plane network architecture to which an embodiment of the present invention may be applied.
- MME Mobility Management Entity
- S-GW Serving Gateway
- PGW Packet Data Network Gateway
- PCRF Policy charging and rules function
- the policy and charging rule function the policy and charging rule function
- the HSS Home Subscriber Server
- the PDN Packet Data Network
- the network element of the evolved packet core The MME and the S-GW are connected through the S11 interface, and the S-GW is connected to the PGW through the S5/8 interface.
- the PGW is connected to the PDN through the SGi interface, and is connected to the PCRF through the Gx interface.
- the MME is also connected to the HSS through the S6a interface.
- the base station eNodeB and the offloaded WLAN access point WLAN AP may be located at the same node on the physical device, or may be at different nodes.
- FIG. 2 is a flow chart of a method for data splitting at a base station side according to an embodiment of the present invention.
- the base station generates a offload configuration signaling indicating that the wireless network offload configuration is performed.
- the offloading request signaling sent by the user equipment may be received, or may be negotiated with the user equipment before receiving the offloading request signaling sent by the user equipment.
- the function negotiation between the base station and the user equipment may include establishing a long-term evolution LTE air interface connection with the user equipment, or receiving the traffic distribution capability information sent by the user equipment during or after the LTE connection establishment process, where the offload capability information is used to indicate The user equipment supports the ability to offload.
- the base station Before the base station enodeB configures the offload signaling for the user equipment, the base station needs to know whether the currently accessed user equipment supports LTE load offloading, and sends the offload configuration signaling according to the currently served user equipment supporting the LTE load offload information.
- the user equipment first initiates an LTE Connection Setup Request (RRC Connection Setup Request) message to the base station before carrying the service through the LTE air interface.
- RRC Connection Setup Request LTE Connection Setup Request
- the base station receives the LTE air interface connection establishment request message of the user equipment
- the LTE air interface connection establishment (RRC Connection Setup) message is sent to the user equipment.
- the user equipment sends an LTE Connection Setup Complete message to the base station.
- the base station establishes an LTE air interface connection with the user equipment.
- the user equipment may report, in the RRC connection setup process, whether the capability of the other radio access technologies to support the LTE load is reported to the base station, that is, the capability of the LTE connection setup request message is included in the RRC connection setup request message.
- the user equipment may also send the capability report message to the base station, and carry its offload capability information, and report the capability information of the offloaded LTE load that it supports to the base station.
- the base station learns whether the currently accessed user equipment can support LTE load offloading. That is, during or after the LTE connection establishment process, the base station receives the offload capability information sent by the user equipment, where the offload capability information is used to indicate that the user equipment supports the offloading capability.
- the base station can also know whether the currently accessed user equipment can support LTE load offloading through the system configuration, and does not need the terminal to send its offload capability information.
- the offload capability information includes: whether to support the wireless network offload, and whether the supported or unsupported radio access technologies, such as whether to support the offloading of the WLAN offload, the WiFi offload, and/or other radio access technologies.
- the base station can obtain information about whether the currently accessed user equipment can support LTE load offloading, and/or the offloaded radio access technology supported by the user equipment, and perform subsequent offload configuration management according to the information. For example, if the user equipment does not support the wireless access offload, the base station configures the user equipment to not use the LTE load offload function in the subsequent configuration; if the user equipment supports the WLAN offload, the user equipment may receive the offload of the WLAN sent by the base station in the subsequent configuration. If the user equipment also supports WiFi offloading, the user equipment may receive the split configuration of the WiFi sent by the base station in the subsequent configuration. If the user equipment also supports other wireless technology offloading, the base station sends other wireless technologies to the user equipment in the subsequent configuration. Diversion configuration.
- the following operations are also applicable to other wireless access technologies to offload LTE loads.
- the user equipment when the user equipment discovers an available WLAN AP or discovers a WLAN AP with better signal quality, the user equipment sends a shunt request signaling to the base station, and performs shunting of the data according to the shunt configuration signaling sent by the received base station. .
- the signal quality of the WLAN AP detected by the available WLAN AP for the user equipment exceeds a pre-configured threshold, and the WLAN AP with better signal quality is better than the currently serving WLAN AP, and exceeds a pre-configured threshold. .
- the offloading request signaling may include a WLAN AP notification message and/or a WLAN signal quality message
- the offloading configuration signaling includes a diversion allowing configuration, the allowed offloading configuration including one or more of the following: a service access point that allows offloading Identification (for example, a logical channel identifier that allows for offloading; a network service node identifier for offloading data (eg, a WLAN AP identity for offloading data); an identity of a traffic data flow that allows offloading (eg, a source Internet that allows traffic to be offloaded) Protocol IP address, and / or destination IP address, and / or port number, etc.).
- a service access point that allows offloading Identification
- a network service node identifier for offloading data eg, a WLAN AP identity for offloading data
- an identity of a traffic data flow that allows offloading (eg, a source Internet that allows traffic to be offloaded) Protocol IP address, and / or destination IP address
- the offloading request signaling (for example, a WLAN AP notification message) is sent to the base station.
- the WLAN AP notification message may include one or more available WLAN AP identifiers detected by the user equipment and a signal strength indication of the WLAN AP, where the WLAN AP identifier may be obtained by using a wireless message of the WLAN AP.
- the base station can select a offloaded port for the user equipment, for example, selecting the most signal quality. Good WLAN ⁇ , or the lightest WLAN AP.
- the base station can also obtain a WLAN AP that can serve the user equipment according to its own configuration and/or network topology information. If there are multiple WLAN APs that can serve the user equipment, for example, multiple WLAN APs simultaneously cover the user.
- the area where the device is located the base station may select at least one WLAN AP among the multiple WLAN APs for the user equipment, and the base station needs to consider at least one of the following factors, that is, the signal quality of the WLAN AP or the load condition of the WLAN AP. Specifically, the WLAN AP with the best signal quality or the WLAN AP with the lightest load is determined according to the base station.
- the base station After determining the WLAN AP that serves the user equipment, the base station sends the offload configuration signaling to the user equipment, and configures the data that the user equipment needs to transmit in the LTE air interface by using the WLAN offload.
- the offload configuration completion message is sent to the base station.
- the user equipment when the signal quality of the WLAN AP used by the user equipment deteriorates and exceeds a pre-configured threshold, or multiple transmission failures occur and the preset maximum number of retransmissions is reached, the user equipment sends offload request signaling (eg, WLAN). Signal quality information) to the base station.
- the WLAN signal quality information may include a WLAN AP identity of the signal degradation and/or a WLAN AP signal strength indication of the signal degradation.
- the WLAN signal quality message may also include an identifier of a neighboring service WLAN AP detected by the user equipment and a WLAN AP signal strength indication.
- the base station When the base station receives the WLAN signal quality message, if the base station determines that it needs to be replaced by the user The WLAN AP of the standby service or the offloading of the currently serving WLAN AP of the user equipment, the base station may send the offload configuration signaling to the user equipment, and reconfigure the traffic distribution configuration of the user equipment.
- the offloading configuration signaling includes a traffic offloading configuration message
- the trafficking prevention configuration message includes one or more of the following: a service access point identifier that needs to be disabled (for example, a logical channel identifier that needs to be disabled); The network service node identifier that prohibits the offloading of data (for example, the WLAN AP identifier used to disable the offloaded data); the identification of the service data flow that needs to be disabled (for example, the source IP address of the service data flow that needs to be disabled, and/or the target) IP address, and/or port number, etc.).
- the offload configuration signaling further includes a traffic off configuration for indicating that the user equipment uses another available WLAN AP or a WLAN AP with better signal quality for offloading.
- the offload configuration completion message is sent to the base station.
- the offloading request signaling sent by the user equipment is received before the base station generates the offload configuration signaling indicating that the wireless network offload configuration is performed.
- the offload request signaling includes a WLAN access point WLAN AP notification message and/or a WLAN WLAN signal quality message.
- the WLAN AP notification message includes the detected WLAN AP identity and/or the signal strength indication of the WLAN AP
- the WLAN signal quality message includes the WLAN AP identity of the signal degradation and/or the WLAN AP signal strength indication of the signal degradation.
- the base station receives the offload request signal sent by the user equipment the WLAN AP signal detected by the user equipment is received before the base station receives the offload request signal sent by the user equipment.
- the base station sends the offload configuration signaling to the user equipment.
- the base station generates offload configuration signaling indicating that the wireless network offload configuration is configured, and sends the offload configuration signaling to the user equipment.
- the user equipment receives the offload configuration signaling sent by the base station and instructs to perform the wireless network offload configuration, and performs the offload configuration according to the offload configuration signaling.
- control plane protocol stack is a schematic diagram of a control plane protocol stack associated with an embodiment of the present invention.
- the control plane protocol may be defined as a new offload control protocol layer.
- the LTE RRC protocol stack may also be reused, that is, the control plane message is an RRC message, and is implemented by modifying the RRC protocol.
- the data offloading method in the embodiment of the present invention can be used to offload data transmitted in an LTE air interface to other available access technologies, thereby satisfying the ever-increasing demand for mobile bandwidth and making up for the lack of bandwidth of the LTE air interface.
- FIG. 4 is a flow chart of a method for data splitting at a base station side according to an embodiment of the present invention.
- Adapted Layer unit for acquiring uplink data and transmitting it to the underlying WLAN air interface; or for accepting the adaptation layer protocol data unit AL PDU and passing it to SAP
- service access point service access point
- the user equipment receives the offloading configuration signaling sent by the base station to perform the configuration of the offloading configuration of the wireless network, and performs the offloading configuration according to the offloading configuration signaling.
- the offload configuration signaling includes a traffic off configuration and a traffic off configuration.
- the allowed traffic distribution configuration may include one or more of the following: a service access point identifier that allows offloading (eg, a logical channel identifier that allows offloading); a network service node identifier that is used to offload data (eg, for offloading data) WLAN AP identity); the identity of the traffic data flow that is allowed to be offloaded (eg, the source IP address of the traffic data stream that is allowed to be offloaded, and/or the destination IP address, and/or port number, etc.).
- a service access point identifier that allows offloading
- a network service node identifier that is used to offload data (eg, for offloading data) WLAN AP identity)
- the identity of the traffic data flow that is allowed to be offloaded eg, the source IP address of the traffic data stream that is allowed to be offloaded, and/or the destination IP address, and/or port number, etc.
- the stop offload configuration message includes one or more of the following: a service access point identifier that needs to be disabled (for example, a logical channel identifier that needs to be disabled); a network service node identifier used to prohibit offloading data (for example, for prohibiting The WLAN AP identifier of the offloaded data); the identifier of the service data flow to be offloaded (for example, the source IP address of the traffic data stream to be offloaded, and/or the destination IP address, and/or the port number, etc.).
- a service access point identifier that needs to be disabled for example, a logical channel identifier that needs to be disabled
- a network service node identifier used to prohibit offloading data for example, for prohibiting The WLAN AP identifier of the offloaded data
- the identifier of the service data flow to be offloaded for example, the source IP address of the traffic data stream to be offloaded, and/or the destination IP address, and/or the port number, etc.
- the user equipment configures the adaptation layer entity or the protocol layer according to the offload configuration signaling.
- the AL layer entity After receiving the offload configuration from the upper layer, the AL layer entity performs offloading (for example, uplink) and receiving (for example, downlink) according to the offload configuration.
- offloading for example, uplink
- receiving for example, downlink
- the application layer When the user equipment is used as the transmitting end, the application layer generates uplink data that needs to be sent, and the data is buffered in the PDCP and/or the RLC entity or the protocol layer.
- the AL layer entity follows Configuring the offloading configuration indicated in the configuration signaling to obtain the upper layer data, for example, obtaining the uplink data of the corresponding service access point according to the identifier of the traffic access point in the configuration information (for example, obtaining the corresponding logic according to the logical channel identifier in the configuration information) Obtaining the uplink data of the corresponding service data stream according to the identifier of the traffic data stream in the configuration information (for example, obtaining the corresponding service data stream according to the IP address, port number, etc. of the traffic data stream in the configuration information) Upstream data).
- the offload configuration signaling may also include one or more of the following data transmission priorities: service access point priority; service data flow priority.
- Logical signals can be implemented in the AL layer entity
- the logical channel prioritization (LPP) module if the base station configures the priority of acquiring data for the user equipment, the logical channel priority module acquires the upper cached data according to the configured priority information of the sent data.
- the user equipment acquires the data to be sent; assembles the data to be sent into an AL PDU, and sends the AL PDU to the corresponding service access point, where the AL PDU carries the AL PDU feature.
- the AL PDU feature includes a service access point identifier, a service data flow identifier, a user equipment identifier, an internet protocol IP address, or a port number.
- the data to be sent is obtained according to the data transmission priority from the traffic distribution configuration signaling, where the data transmission priority includes a service access point priority and/or a service data flow priority.
- assembling the data into an AL PDU comprises multiplexing the data into an AL PDU.
- the AL entity or the protocol layer may multiplex or concatenate the acquired uplink data from multiple service access points (eg, logical channels, dedicated transport channels) and service data streams into one adaptation layer protocol data unit AL.
- the PDU includes, for example, data of the multiplexed logical channel group and a logical channel identifier to which the corresponding data belongs.
- the uplink data is multiplexed into an AL PDU carrying an AL PDU feature by multiplexing module in the AL layer unit, and the AL PDU is sent to a corresponding service access point
- the AL PDU feature may include a logical channel. ID, amount of data corresponding to the logical channel, user equipment ID, IP address, or port number.
- the uplink channel data of the logical channel is obtained by the Logical Channel Prioritization module in the AL layer entity according to the priority of the logical channel.
- an AL PDU may correspond to one logical channel or may correspond to multiple logical channels.
- FIG. 5 is a structural diagram of an adaptation layer implementing a data offloading method according to an embodiment of the present invention.
- the RLC or PDCP layer entity receives data from the upper layer, and the data is passed to the underlying protocol layer through the RLC or PDCP layer and the lower layer (AL layer) service access point.
- the scheme recorded in this embodiment can be applied to any logical channel (e.g., CCCH, DCCH, DTCH, etc.), where a dedicated transport channel (DTCH) is taken as an example.
- the logical channel is not configured as a logical channel of WLAN offload (WLAN offload). Therefore, the data of the logical channel needs to be transmitted through LTE.
- the LTE MAC layer obtains the uplink resource allocated by the base station
- the LTE MAC obtains the data of the logical channel 1 through the service access point, and transmits the data to the bottom layer through the transport channel service access point, and transmits the data on the LTE air interface.
- the logical channel is configured as a logical channel of WLAN offload (WLAN offload).
- the data of the logical channel needs to be transmitted through the WLAN, and the AL layer acquires the data of the logical channel 2 through the RLC or the service access point between the PDCP and the AL layer, and passes the UL/DL offload SAP (UL/DL) with the bottom layer.
- the offloaded service access point is passed to the underlying layer and transmitted on the WLAN air interface.
- the logical channel is configured such that the data of the logical channel can be transmitted through the LTE or the WLAN, and the LTE MAC and the AL layer respectively obtain the service access point between the RLC or the PDCP layer.
- Data of the RLC or PDCP layer, the data acquired by the LTE MAC is transmitted to the bottom layer through the service access point with the LTE PHY, and transmitted on the LTE air interface; the AL layer passes the UL/DL offload SAP with the underlying layer (UL/DL offload)
- the service access point is passed to the bottom layer and transmitted on the WLAN air interface.
- the AL entity or protocol layer of the user equipment receives the AL PDU carrying the characteristics of the AL PDU. If the AL multiplexing function is implemented on the transmitting end, the demultiplexing module in the AL layer unit of the receiving end is solved. Using the AL PDU, and transmitting the demultiplexed downlink data to the corresponding AL upper layer service access point and/or according to the service access point identifier and/or the logical channel identifier included in the data packet.
- the logical channel, the AL PDU feature includes: a service access point identifier (or logical channel identifier), a user equipment identifier, a service data stream identifier, an IP address, or a port number.
- the offloaded radio access technology may carry other services while offloading the LTE load. Therefore, in order to ensure that the received underlying offload access entity can transmit the LTE offload data to the AL entity, optionally, before receiving the AL PDU,
- the received AL PDU is identified by the packet filtering unit according to the AL PDU feature, and the identified AL PDU is sent to the adaptation layer unit.
- a control module can be implemented in the AL layer unit for receiving the configuration of the shunt control unit, the control multiplexing module, the demultiplexing module, and the logical channel priority module.
- the user equipment receives the AL PDU carrying the AL PDU feature, demultiplexes the AL PDU, and transmits the demultiplexed data to the corresponding service access point.
- the received AL PDU is identified according to the AL PDU feature, and the identified AL PDU is sent to the adaptation layer entity/protocol layer in the user equipment.
- the method of data offloading implemented by the user side is described in detail above with reference to FIGS. 4 and 5. It should be understood that the above method of data offloading is also applicable to the base station side, where corresponding units and modules are adjusted accordingly.
- the data offloading method in the embodiment of the present invention can be used to offload data transmitted in an LTE air interface to other available access technologies, thereby satisfying the ever-increasing mobile bandwidth requirement and making up for the lack of bandwidth of the LTE air interface transmission.
- FIG. 6 is a schematic block diagram of a user equipment having data offload capabilities in accordance with one embodiment of the present invention.
- FIG. 7 is a schematic block diagram of a user equipment having data offload capability according to another embodiment of the present invention.
- the user equipment 60 includes: a traffic distribution control unit 61, configured to receive a traffic distribution configuration signaling sent by the base station to perform a wireless network offload configuration, and perform a traffic distribution configuration according to the traffic distribution configuration signaling; The offloading configuration offloads data.
- the adaptation layer unit 62 includes a control module 621 for controlling the AL layer unit to acquire the offload data or the offload data, for example, whether to acquire data of a specific logical channel, or which specific logical channels need to be transmitted to the offloaded data.
- the control module can accept the configuration from the shunt control unit, and the shunt control unit can be an independent shunt control protocol layer, or can be implemented in the LTE RRC layer or the NAS layer (non-access stratum).
- a multiplexing function can be implemented in the AL layer, that is, data from multiple logical channels of a higher layer is assembled into one AL PDU, and in the AL PDU.
- the data volume of the multiplexed logical channel identifier and/or the corresponding logical channel is carried, and then the assembled AL PDU is transmitted to the bottom layer through the AL layer and the lower layer service access point.
- the adaptation layer unit 62 further includes a logical channel priority LCP module 622 and a multiplexing module 623.
- the LCP module 622 transmits data according to the shunt configuration signaling under the control of the control module 621.
- Priority acquisition data including service access point priority and/or service data flow priority.
- the multiplexing module 623 multiplexes the acquired data into an adaptation layer protocol data unit AL PDU under the control of the control module 621, and transmits the AL PDU to the corresponding service access point.
- the AL PDU needs to be processed by the AL layer on the receiving side, and the user equipment may also use other EPS-independent WLAN applications, for example, the data of the application is not transmitted through the EPS core network, the AL PDU needs to be identified at the receiving end. And passed to the UL/DL offload SAP, a packet filtering unit can be implemented on the receiving side, and the data of the AL layer is filtered according to the characteristics of the AL PDU, and submitted to the AL layer for processing, and the AL PDU feature can also be a user equipment. Identification, IP address, port number, etc.
- the AL at the transmitting end implements multiplexing data of multiple logical channels into one AL PDU
- the function of the AL on the receiving side needs to implement a de-multiplexing function, which is used to transmit data of multiple logical channels multiplexed by the transmitting end to the corresponding service access point of the upper layer respectively.
- Logical channel
- the adaptation layer unit includes a demultiplexing module 624 that demultiplexes the received AL PDU under the control of the control module 621 and demultiplexes the received The data is transmitted to the corresponding service access point.
- a data packet filtering unit 63 may be further disposed in the user equipment, where the data packet filtering unit 63 is configured to identify the received AL PDU according to the AL PDU feature, and The identified AL PDU is sent to the adaptation layer unit 62.
- the AL PDU feature includes a service access point identifier, a service data flow identifier, a user equipment identifier, an internet protocol IP address, or a port number.
- the user equipment of the embodiment of the present invention can be used to offload data transmitted in the LTE air interface to other available access technologies, so as to meet the ever-increasing demand for mobile bandwidth, and to compensate for the lack of bandwidth of the LTE air interface.
- the steps of a method or algorithm described in connection with the embodiments disclosed herein can be implemented in hardware, a software module executed by a processor, or a combination of both.
- the software module can be placed in random access memory (RAM), memory, read only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or technical field. Any other form of storage medium known.
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Abstract
本发明实施例提供了一种数据分流的方法以及用户设备,其中该数据分流的方法包括接收基站发送的指示进行无线网络分流配置的分流配置信令,依据所述分流配置信令进行分流配置;以及依据所述分流配置对数据进行分流。该用户设备包括分流控制单元和适配层单元。从而,将在LTE空口传输的数据分流到其他的可用接入技术上,能够满足不断增加的移动带宽需求,弥补LTE空口传输带宽不足的缺憾。
Description
数据分流的方法以及用户设备 本申请要求于 2011 年 7 月 20 日提交中国专利局、 申请号为 201110203495.4、 发明名称为 "数据分流的方法以及用户设备" 的中国专利 申请的优先权, 其全部内容通过引用结合在本申请中。 技术领域
本发明实施例涉及通信领域, 具体地, 涉及一种在无线通信网络中进 行数据分流的方法及实现数据分流的用户设备。
发明背景
LTE ( Long Term Evolution, 长期演进)也被通俗的称为 3.9G, 具有 100Mbps的数据下载能力, 被视作从 3G向 4G演进的主流技术。 LTE的研究, 包含了一些普遍认为很重要的部分, 如等待时间的减少、 更高的用户数据 速率、 系统容量和覆盖的改善以及运营成本的降低。
3GPP( 3rd Generation Partnership Program,第三代合作伙伴计划 LTE 项目是近两年来 3GPP启动的最大的新技术研发项目 , 这种以 OFDM/FDMA (正交频分复用技术 /频分多址) 为核心的技术可以被看作"准 4G"技术。 3GPP LTE项目的主要性能目标包括: 在 20MHz频谱带宽能够提供下行 100Mbps, 上行 50Mbps的峰值速率; 改善小区边缘用户的性能; 提高小区 容量; 降低系统延迟, 用户平面内部单向传输时延低于 5ms, 控制平面从睡 眠状态到激活状态迁移时间低于 50ms, 从驻留状态到激活状态的迁移时间 小于 100ms; 支持 100km半径的小区覆盖; 能够为 350km/h高速移动用户提 供大于 100kbps的接入服务; 支持成对或非成对频谱, 并可灵活配置 1.25 MHz到 20MHz多种带宽。
WLAN ( Wireless Local Area Networks , 无线局域网络)是一种利用射 频 (Radio Frequency RF)技术进行据传输的系统。 该技术有线局域网络的补 充, 达到网络延伸的目的, 使得无线局域网络能利用简单的存取架构让用 户透过它, 实现无网线、 无距离限制的通畅网络。 作为 WLAN的一个标准,
WiFi ( Wireless Fidelity, 无线保真)是由 AP(Access Point)和无线网卡组成 的无线网络。 AP—般称为网络桥接器或接入点, 它是当作传统的有线局域 网络与无线局域网络之间的桥梁, 因此任何装有无线网卡的用户终端均可 透过 AP去分享有线局域网络甚至广域网络的资源,其工作原理相当于一个 内置无线发射器的 HUB或者是路由, 而无线网卡则是负责接收由 AP所发射 信号的客户端设备。
目前,对于 EPS ( Evolved Packet System,演进分组系统), 空口采用 LTE 技术,通过部署 eNodeB ( evolved Node B,演进基站)来实现。而当 UE ( User Equipment, 用户设备)使用 EPS 系统中的业务时, 用户设备只能通过网络 所部属的 eNodeB的 LTE空口传输。
随着带宽需求的增长, 网络运营商需要依赖部署更多的 LTE基站、缩小 覆盖来增加空口传输带宽, 进而导致投资成本与维护成本的增加。 因此, 为了满足不断增加的移动带宽需求, 弥补 LTE空口传输带宽不足的缺憾, 需 要考虑将需要在 LTE空口传输的数据分流到其他的可用接入技术上。 发明内容 本发明实施例提供一种在无线通信网络中进行数据分流的方法以及实 现该数据分流方法的用户设备, 能够支持 LTE负载分流。
一方面, 本发明实施例提供了一种数据分流的方法, 包括: 接收基站 发送的指示分流配置的分流配置信令, 依据所述分流配置信令进行分流配 置; 以及依据所述分流配置对数据进行分流。
另一方面, 本发明实施例提供了一种数据分流方法, 包括: 产生指示 进行无线网络分流配置的分流配置信令; 以及将所述分流配置信令发送到 用户设备。
再一方面, 本发明实施例提供了一种用户设备, 包括: 分流控制单元, 用于接收基站发送的指示进行无线网络分流配置的分流配置信令, 依据所 述分流配置信令进行分流配置; 以及适配层单元, 用于依据所述分流配置 对数据进行分流。
本发明实施例可以将在 LTE空口传输的数据分流到其他的可用接入技 术上, 从而能够满足不断增加的移动带宽需求, 弥补 LTE空口传输带宽不
足的缺憾。
附图简要说明 为了更清楚地说明本发明实施例的技术方案, 下面将对实施例或现有 技术描述中所需要使用的附图作简单地介绍, 显而易见地, 下面描述中的 附图仅仅是本发明的一些实施例, 对于本领域普通技术人员来讲, 在不付 出创造性劳动性的前提下, 还可以根据这些附图获得其他的附图。
图 1是可应用本发明实施例的 WLAN分流控制面网络架构的示意图。 图 2是根据本发明实施例的基站侧数据分流的方法的流程图。
图 3是与本发明实施例相关的控制面协议栈的示意图。
图 4是根据本发明实施例的基站侧数据分流的方法的流程图。
图 5是实现根据本发明实施例的数据分流方法的适配层的结构图。 图 6是根据本发明一个实施例的具备数据分流能力的用户设备的示意 框图。
图 7是根据本发明另一实施例的具备数据分流能力的用户设备的示意 框图。 实施本发明的方式
1.下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案 进行清楚、 完整地描述, 显然, 所描述的实施例是本发明一部分实施例, 而不是全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没 有作出创造性劳动前提下所获得的所有其他实施例, 都属于本发明保护的 范围。
随着智能用户设备的迅猛发展, 越来越多的移动通信终端都集成了无 线局域网的通信模块, 例如 WiFi模块。 另一方面, 随着人们对移动宽带需 求的不断增加, 现有的无线蜂窝通信系统承受到越来越大的数据流量的压 力。 一个可行的方法是把无线蜂窝技术和无线接入技术相互融合, 例如利 用 WLAN分流移动蜂窝通信系统的数据流量, 从而大大提高蜂窝系统用户 的体验。
图 1是可应用本发明实施例的 WLAN分流控制面网络架构的示意图。
图 1中所示 MME ( Mobility Management Entity, 移动性管理实体)、 S-GW ( Serving Gateway, 月良务网关)、 PGW (Packet Data Network Gateway, 分组 数据网网关)、 PCRF ( Policy charging and rules function, 策略和计费规则功 能)、 HSS ( Home Subscriber Server, 归属用户服务器)、 PDN ( Packet Data Network, 分组数据网络)等可以是现有 3GPP协议体系所定义的 LTE核心 网 EPC ( Evolved Packet Core, 演进的分组核心) 的网元。 MME和 S-GW 之间通过 S11接口相连, S-GW通过 S5/8接口与 PGW相连。 PGW则通过 SGi接口与 PDN相连, 同时通过 Gx接口与 PCRF相连。 MME还通过 S6a 接口与 HSS相连。 在 LTE的无线接入网网元只有一个, 即 eNodeB, eNB 通过控制面接口 S 1 -mme和用户面接口 S lu分别和 MME和 S-GW相连。
在上述网络架构中, 基站 eNodeB与分流的无线局域网接入点 WLAN AP在物理设备上可以位于同一节点, 也可以处于不同的节点。
参照图 2说明根据本发明实施例的基站侧数据分流的控制面流程。图 2 是根据本发明实施例的基站侧数据分流的方法的流程图。
201 , 基站产生指示进行无线网络分流配置的分流配置信令。
在基站产生分流配置信令之前, 可以接收由用户设备发送的分流请求 信令, 或者可以在接收由用户设备发送的分流请求信令之前与用户设备进 行功能协商。
基站与用户设备进行功能协商可以包括与所述用户设备建立长期演进 LTE空口连接; 或者在 LTE连接建立过程之中或之后接收所述用户设备发 送的分流能力信息, 所述分流能力信息用于指示所述用户设备支持分流的 能力。
在基站 enodeB为用户设备配置分流信令之前,基站需要获知当前接入 的用户设备是否支持 LTE负载分流, 并依据当前服务的用户设备支持 LTE 负载分流的信息而向其发送分流配置信令。
用户设备在通过 LTE空口承载业务之前,首先向基站发起 LTE空口连 接建立请求( RRC Connection Setup Request )消息。 当基站接收到用户设备 的 LTE空口连接建立请求消息,将向用户设备发送 LTE空口连接建立( RRC Connection Setup ) 消息。 当用户设备在成功进行 LTE空口连接建立后, 则 向基站发送 LTE空口连接建立完成( RRC Connection Setup Complete )消息。 此时, 基站与用户设备建立 LTE空口连接。
可选的, 用户设备可以在 RRC连接建立过程中, 将其是否支持其他无 线接入技术分流 LTE负载的能力报告给基站,即在 RRC连接建立请求消息 中包含其所支持的分流 LTE 负载的能力信息。 用户设备也可以在 RRC连 接建立完成后, 通过向基站发送能力报告消息, 携带其分流能力信息, 将 其所支持的分流 LTE负载的能力信息报告给基站。 基站接收到所述分流能 力信息后, 获知当前接入的用户设备是否能够支持 LTE负载分流。 即, 在 LTE 连接建立过程之中或之后, 基站接收用户设备发送的分流能力信息, 所述分流能力信息用于指示所述用户设备支持分流的能力。
另外, 基站也可以通过系统配置获知当前接入的用户设备是否能够支 持 LTE负载分流, 而不需要终端发送其分流能力信息。 所述分流能力信息 包括: 是否支持无线网络分流, 以及所支持或不支持的无线接入技术, 例 如, 是否支持 WLAN分流、 WiFi分流和 /或其它无线接入技术的分流。
通过上述过程, 基站能够获得当前接入的用户设备是否能够支持 LTE 负载分流, 和 /或用户设备所支持的分流的无线接入技术等信息, 并依据该 信息执行后续的分流配置管理。 例如, 如果用户设备不支持无线接入分流, 则在后续配置中基站配置用户设备不使用 LTE负载分流功能; 如果用户设 备支持 WLAN分流,则用户设备在后续配置中可以接收基站发送的 WLAN 的分流配置; 如果用户设备也支持 WiFi分流, 则用户设备在后续配置中可 以接收基站发送的 WiFi的分流配置; 如果用户设备也支持其它无线技术分 流, 则在后续配置中基站向用户设备发送其它无线技术的分流配置。
以下以 WLAN为例, 说明当发现或丟失 WLAN时, 基站如何向用户 设备发送分流配置信令的操作。 以下操作也适用于其它无线接入技术分流 LTE负载。
一般地, 在用户设备发现可用的 WLAN AP或者发现信号质量更好的 WLAN AP时, 用户设备会向基站发送分流请求信令, 并且依据接受到的基 站发送的分流配置信令执行对数据的分流。 所述可用 WLAN AP为用户设 备检测到的该 WLAN AP的信号质量超过预先配置的阈值, 所述信号质量 更好的 WLANAP为该 WLAN AP的信号质量好过当前服务的 WLANAP, 并且超过预先配置的阈值。 该分流请求信令可以包括 WLAN AP通知消息 和 /或 WLAN信号质量消息, 而该分流配置信令包括允许分流配置, 该允许 分流配置包括下面的一个或多个内容: 允许分流的业务接入点标识 (例如,
允许分流的逻辑信道标识); 用于分流数据的网络服务节点标识(例如, 用 于分流数据的 WLAN AP标识); 允许分流的业务数据流的标识(例如, 允 许分流的业务数据流的源互联网协议 IP地址, 和 /或目标 IP地址, 和 /或端 口号等)。
具体而言, 当用户设备检测到附近有可使用的 WLAN AP或者发现信 号质量更好的 WLANAP时, 则发送分流请求信令 (例如, WLANAP通知 消息 )给基站。 其中, WLAN AP通知消息可以包含用户设备所检测到的一 个或多个可用的 WLAN AP标识以及 WLAN AP的信号强度指示 ,该 WLAN AP标识可以通过 WLAN AP的无线消息获得。
当基站接收到 WLAN AP 通知消息, 获得可为该用户设备服务的 WLAN AP , 如果该消息中包含多个候选的 WLAN AP , 则基站可以为用户 设备选择一个分流的 ΑΡ, 比如选择其中信号质量最好的 WLAN ΑΡ、 或者 负载最轻的 WLAN AP。
另外, 基站也可以依据其自身的配置和 /或网络拓朴信息获得可以为该 用户设备服务的 WLAN AP , 如果存在多个可以为用户设备服务的 WLAN AP, 比如: 多个 WLANAP 同时覆盖了用户设备所在的区域, 基站可以为 该用户设备在上述多个 WLAN AP中选择至少一个 WLAN AP ,基站在选择 时至少需要考虑下面因素之一, 即 WLAN AP的信号质量或 WLAN AP的 负载情况。 具体地, 依据基站判断信号质量最好的 WLAN AP或负载最轻 的 WLANAP。
在确定为用户设备服务的 WLAN AP后, 基站向用户设备发送分流配 置信令, 配置用户设备使用 WLAN分流需要在 LTE空口传输的数据。
可选的, 在用户设备完成分流配置后, 将分流配置完成消息发送给基 站。
另外, 当用户设备所使用的 WLAN AP的信号质量变差并超过预先配 置的阈值, 或者发生多次传输失败且达到预先设置的最大重传次数, 则用 户设备发送分流请求信令(例如, WLAN信号质量信息)给基站。该 WLAN 信号质量信息可以包括信号变差的 WLANAP标识和 /或信号变差的 WLAN AP信号强度指示。 此外, 该 WLAN信号质量消息也可以包含用户设备所 检测到的相邻服务 WLANAP的标识以及 WLAN AP信号强度指示。
当基站接收到 WLAN信号质量消息,如果基站判断需要更换为用户设
备服务的 WLAN AP或停止该用户设备在当前服务的 WLAN AP的分流, 基站可以向用户设备发送分流配置信令, 重新配置用户设备的分流配置。 此时, 分流配置信令包括禁止分流配置消息, 该禁止分流配置消息包括下 面的一个或多个内容: 需要禁止分流的业务接入点标识(例如, 需要禁止 分流的逻辑信道标识); 用于禁止分流数据的网络服务节点标识(例如, 用 于禁止分流数据的 WLAN AP标识);需要禁止分流的业务数据流的标识(例 如, 需要禁止分流的业务数据流的源 IP地址, 和 /或目标 IP地址, 和 /或端 口号等)。 并且, 该分流配置信令还包括允许分流配置, 用于指示用户设备 使用另外的可用的 WLAN AP或信号质量更好的 WLAN AP进行分流。
可选的, 当用户设备完成分流配置后, 将分流配置完成消息发送给基 站。
综上所述, 在基站产生指示进行无线网络分流配置的分流配置信令之 前, 接收用户设备发送的分流请求信令。 分流请求信令包括无线局域网接 入点 WLAN AP通知消息和 /或无线局域网 WLAN信号质量消息。 WLAN AP 通知消息包括检测到的 WLAN AP标识和 /或 WLAN AP的信号强度指示, WLAN信号质量消息包括信号变差的 WLAN AP 标识和 /或信号变差的 WLAN AP信号强度指示。 可选地, 在基站接收用户设备发送的分流请求信 令之前, 接收所述用户设备检测到的 WLAN AP信号。
202, 基站将分流配置信令发送到用户设备。
在以上各种情况下, 基站产生指示进行无线网络分流配置的分流配置 信令, 将分流配置信令发送到用户设备。 用户设备接收基站发送的指示进 行无线网络分流配置的分流配置信令, 依据所述分流配置信令进行分流配 置。
图 3是与本发明实施例相关的控制面协议栈的示意图。 如图 3所示, 该控制面协议可以定义为新的分流控制协议层; 也可以重用 LTE RRC协议 栈, 即控制面消息为 RRC消息, 通过修改 RRC协议实现。
通过以上本发明实施例的数据分流的方法, 可以将在 LTE空口传输的 数据分流到其他的可用接入技术上, 从而能够满足不断增加的移动带宽需 求, 弥补 LTE空口传输带宽不足的缺憾。
以下以用户设备侧为例, 参照图 4和图 5具体描述依据本发明的实施 例的在无线通信网络中数据分流的方法的实现过程。
图 4是根据本发明实施例的基站侧数据分流的方法的流程图。
为了实现数据分流, 在 RLC或者 PDCP协议层的下层实现一个 AL层
( Adapted Layer,适配层 )单元,用于获取上行数据, 并传递给底层 WLAN 空口发送; 或者用于接受适配层协议数据单元 AL PDU, 并传递给 SAP
( service access point, 业务接入点 )。
401 ,用户设备接收基站发送的指示进行无线网络分流配置的分流配置 信令, 依据所述分流配置信令进行分流配置;
其中, 分流配置信令包括允许分流配置和禁止分流配置。 其中, 允许 分流配置可以包括下面的一个或多个内容:允许分流的业务接入点标识(例 如,允许分流的逻辑信道标识); 用于分流数据的网络服务节点标识(例如, 用于分流数据的 WLAN AP标识); 允许分流的业务数据流的标识(例如, 允许分流的业务数据流的源 IP地址, 和 /或目标 IP地址, 和 /或端口号等)。 停止分流配置消息包括下面的一个或多个内容: 需要禁止分流的业务接入 点标识(例如, 需要禁止分流的逻辑信道标识); 用于禁止分流数据的网络 服务节点标识(例如, 用于禁止分流数据的 WLAN AP标识); 需要禁止分 流的业务数据流的标识(例如, 需要禁止分流的业务数据流的源 IP地址, 和 /或目标 IP地址, 和 /或端口号等)。
用户设备依据分流配置信令配置适配层实体、 或协议层。
402, 依据分流配置对数据进行分流。
在 AL层实体接收到来自上层的分流配置后, 依据所述分流配置对数 据进行分流的发送(比如: 上行)和接收(比如: 下行)。
当用户设备作为发送端, 应用层产生需要发送的上行数据, 该数据緩 存于 PDCP和 /或 RLC 实体或协议层中, 如果所述分流配置信令中指示执 行数据分流, 则, AL层实体按照配置信令中所指示的分流配置获取上层数 据, 比如: 依据配置信息中的分流业务接入点标识获取对应业务接入点的 上行数据(例如, 依据配置信息中的逻辑信道标识获取对应的逻辑信道的 上行数据 ); 或者依据配置信息中的分流业务数据流的标识获取对应业务数 据流的上行数据(例如, 依据配置信息中的分流业务数据流 IP地址、 端口 号等获取对应业务数据流的上行数据)。
另外, 所述分流配置信令中也可以包含下述数据发送优先级的一个或多 个: 业务接入点优先级; 业务数据流优先级。 AL层实体中可以实现逻辑信
道优先级(Logical Channel Prioritization, LCP )模块, 如果基站为用户设 备配置了获取数据的优先级, 则逻辑信道优先级模块依据所配置的发送数 据的优先级信息获取上层緩存的数据。
综上所述, 用户设备获取需要发送的数据; 将需要发送的数据组装成 AL PDU, 并将该 AL PDU发送到对应的业务接入点, 所述 AL PDU携带 AL PDU特征。 该 AL PDU特征包括业务接入点标识、 业务数据流标识、 用 户设备标识、 互联网协议 IP地址或端口号。 可选地, 获取需要发送的数据 是依据来自所述分流配置信令的数据发送优先级获取数据, 其中所述数据 发送优先级包括业务接入点优先级和 /或业务数据流优先级。 可选地, 将所 述数据组装成 AL PDU包括将所述数据复用组装为 AL PDU。
另外, AL实体或协议层可以将所获取的来自多个业务接入点 (例如, 逻辑信道, 专用传输信道)、 业务数据流的上行数据复用或串接为一个适配 层协议数据单元 AL PDU,该 AL PDU中例如包含了所复用的逻辑信道组的 数据, 以及对应数据所属的逻辑信道标识。
也就是说, 该上行数据通过 AL层单元中的复用模块复用组装成携带 有 AL PDU特征的 AL PDU , 并将 AL PDU发送到对应的业务接入点, 该 AL PDU特征可以包括逻辑信道标识、对应逻辑信道的数据量、用户设备标 识、 IP地址或端口号。 其中, 还可以包含由 AL层实体中的逻辑信道优先 级( Logical Channel Prioritization )模块依据逻辑信道的优先级获取逻辑信 道的上行数据。 这里, 一个 AL PDU可以对应于一个逻辑信道, 也可以对 应于多个逻辑信道。
图 5是实现根据本发明实施例的数据分流方法的适配层的结构图。 如 图 5所示, RLC或 PDCP层实体接收到来自高层的数据, 数据通过 RLC或 PDCP层与低层(AL层) 的业务接入点传递到底层协议层。 该实施例中所 记录的方案可以适用于任何逻辑信道(比如, CCCH, DCCH, DTCH等), 此处以专用传输信道 ( DTCH ) 为例。
对应逻辑信道 1 , 该逻辑信道没有被配置为 WLAN offload ( WLAN分 流)的逻辑信道。 因此, 该逻辑信道的数据需要通过 LTE进行传输。 当 LTE MAC层得到基站所分配的上行资源, LTE MAC通过业务接入点获取逻辑 信道 1的数据, 并通过传输信道业务接入点传递给底层, 并在 LTE空口上 传输。
对应逻辑信道 2, 该逻辑信道被配置为 WLAN offload ( WLAN分流) 的逻辑信道。 因此, 该逻辑信道的数据需要通过 WLAN进行传输, AL层 通过 RLC或 PDCP与 AL层之间的业务接入点获取逻辑信道 2的数据, 并 通过与底层的 UL/DL offload SAP ( UL/DL分流业务接入点 )传递给底层, 并在 WLAN空口上传输。
对应逻辑信道 3 , 该逻辑信道被配置为该逻辑信道的数据既可以通过 LTE传输, 也可以通过 WLAN传输, 则 LTE MAC与 AL层通过与 RLC或 PDCP层之间的业务接入点 , 分别获取 RLC或 PDCP层的数据 , LTE MAC 获取的数据通过与 LTE PHY之间的业务接入点传递给底层,并在 LTE空口 上传输; AL层通过与底层的 UL/DL offload SAP ( UL/DL分流业务接入点 ) 传递给底层, 并在 WLAN空口上传输。
当用户设备作为接收端, 用户设备 的 AL 实体或协议层接收携带有 AL PDU特征的 AL PDU , 如果在发送端实现了 AL复用功能, 则接收端的 AL层单元中的解复用模块解复用所述 AL PDU, 并将解复用的下行数据, 依据数据包中所包含的业务接入点标识和 /或逻辑信道标识, 将数据分别传 送给对应的 AL上层业务接入点和 /或逻辑信道, 所述 AL PDU特征包括: 业务接入点标识(或逻辑信道标识)、 用户设备标识、 业务数据流标识, IP 地址或端口号。由于分流的无线接入技术在分流 LTE 负载的同时还可能承 载其他业务, 因此, 为了保证接收的底层分流接入实体可以将 LTE分流数 据传递给 AL实体, 可选的, 在接收 AL PDU之前, 通过数据包过滤单元 依据 AL PDU特征识别接收到的 AL PDU,并将所识别的 AL PDU发送给适 配层单元。
在 AL层单元可以实现控制模块, 用于接收分流控制单元的配置, 控 制复用模块、 解复用模块以及逻辑信道优先级模块。
综上所述, 用户设备接收携带 AL PDU特征的 AL PDU, 解复用该 AL PDU,并将解复用的数据传送给对应的业务接入点。可选地,在接收 AL PDU 之前, 依据 AL PDU特征识别接收到的 AL PDU, 并将所识别的 AL PDU 发送给用户设备中的适配层实体 /协议层。
以上结合图 4和图 5对用户侧实现的数据分流的方法进行了详细描述。 应当理解, 上述数据分流的方法也适用于基站侧, 其中对相应单元和模块 作相应调整。
通过以上本发明实施例的数据分流的方法, 可以将在 LTE空口传输的 数据分流到其他的可用接入技术上, 从而能够满足不断增加的移动带宽需 求, 弥补 LTE空口传输带宽不足的缺憾
图 6是根据本发明一个实施例的具备数据分流能力的用户设备的示意 框图。 图 7是根据本发明另一实施例的具备数据分流能力的用户设备的示 意框图。 这种用户设备 60包括: 分流控制单元 61 , 用于接收基站发送的指 示进行无线网络分流配置的分流配置信令, 依据所述分流配置信令进行分 流配置; 适配层单元 62, 用于依据所述分流配置对数据进行分流。
所述适配层单元 62包括控制模块 621 , 用于控制 AL层单元获取分流 数据或者分流数据, 比如, 是否需要获取某一特定逻辑信道的数据, 或者 需要将分流数据传送到哪些特定逻辑信道。 该控制模块, 可以接受来自分 流控制单元的配置, 该分流控制单元可以是独立分流控制协议层, 也可以 在 LTE RRC层或 NAS层 (非接入层 ) 实现。
在 AL层中, 对于超过一个逻辑信道传输的 WLAN分流数据, 则 AL 层中可以实现复用 (multiplexing ) 功能, 即将来自高层的多个逻辑信道的 数据组装成一个 AL PDU, 并在 AL PDU中携带复用的逻辑信道标识和 /或 对应的逻辑信道的数据量, 之后通过 AL层与下层业务接入点将组装后的 AL PDU传递给底层发送。
由此可见, 可选地, 适配层单元 62还包括逻辑信道优先级 LCP模块 622和复用模块 623 ,该 LCP模块 622在控制模块 621的控制下按照来自所 述分流配置信令的数据发送优先级获取数据, 包括业务接入点优先级和 /或 业务数据流优先级。 复用模块 623在控制模块 621 的控制下将获取的数据 复用组装成适配层协议数据单元 AL PDU,并将所述 AL PDU发送给对应的 业务接入点。
由于 AL PDU在接收侧需要由 AL层处理, 而同时用户设备也可能在 使用其他独立于 EPS的 WLAN应用, 比如该应用的数据不通过 EPS核心 网传输, 因此需要在接收端将 AL PDU识别出来, 并传递给 UL/DL offload SAP, 可以在接收侧实现一个数据包过滤单元, 依据 AL PDU的特征将 AL 层的数据过滤出来,并递交给 AL层处理,该 AL PDU特征也可以是用户设 备标识, IP地址, 端口号等。
如果在发送端的 AL实现了将多个逻辑信道的数据复用为 1个 AL PDU
的功能, 则在接收侧的 AL需要实现解复用 (de-multiplexing )功能, 用于 将发送端复用的多个逻辑信道的数据, 通过与上层的业务接入点, 分别传 递给对应的逻辑信道。
因此, 当用户设备作为接受端时, 适配层单元包括解复用模块 624, 该 解复用模块 624在控制模块 621的控制下将接收到的 AL PDU解复用, 并 将解复用的数据传送到对应的业务接入点。为了区分在发送端 AL组装成的 AL PDU, 可选地, 在用户设备中还可以设置数据包过滤单元 63 , 该数据包 过滤单元 63用于依据 AL PDU特征识别接收到的 AL PDU, 并将所识别的 AL PDU发送给所述适配层单元 62。 AL PDU特征包括业务接入点标识、业 务数据流标识、 用户设备标识、 互联网协议 IP地址或端口号。
通过以上本发明实施例的用户设备, 可以将在 LTE空口传输的数据分 流到其他的可用接入技术上, 从而能够满足不断增加的移动带宽需求, 弥 补 LTE空口传输带宽不足的缺憾
本领域普通技术人员可以意识到, 结合本文中所公开的实施例描述的 各示例的单元及算法步骤, 能够以电子硬件、 计算机软件或者二者的结合 来实现, 为了清楚地说明硬件和软件的可互换性, 在上述说明中已经按照 功能一般性地描述了各示例的组成及步骤。 这些功能究竟以硬件还是软件 方式来执行, 取决于技术方案的特定应用和设计约束条件。 专业技术人员 可以对每个特定的应用来使用不同方法来实现所描述的功能, 但是这种实 现不应认为超出本发明的范围。
结合本文中所公开的实施例描述的方法或算法的步骤可以用硬件、 处 理器执行的软件模块, 或者二者的结合来实施。 软件模块可以置于随机存 储器(RAM )、 内存、 只读存储器(ROM )、 电可编程 ROM、 电可擦除可 编程 ROM、 寄存器、 硬盘、 可移动磁盘、 CD-ROM、 或技术领域内所公知 的任意其它形式的存储介质中。
尽管已示出和描述了本发明的一些实施例, 但本领域技术人员应理解, 在不脱离本发明的原理和精神的情况下, 可对这些实施例进行各种修改, 这样的修改应落入本发明的范围内。
Claims
1、 一种数据分流的方法, 其特征在于, 包括:
接收基站发送的指示进行无线网络分流配置的分流配置信令, 依据所 述分流配置信令进行分流配置;
依据所述分流配置对数据进行分流。
2、 根据权利要求 1所述的方法, 其特征在于, 所述依据所述分流配置 对数据进行分流包括:
接收适配层协议数据单元 AL PDU, 所述 AL PDU携带 AL PDU特征; 解复用所述 AL PDU, 并将解复用的数据传送给对应的业务接入点。
3、 根据权利要求 2所述的方法, 其特征在于, 所述对数据进行分流还 包括: 在接收 AL PDU之前,依据 AL PDU特征识别接收到的 AL PDU, 并 将所识别的 AL PDU发送给适配层单元。
4、 根据权利要求 1所述的方法, 其特征在于, 所述依据所述分流配置 所述对数据进行分流还包括:
获取需要发送的数据;
将所述数据组装成 AL PDU, 并将所述 AL PDU发送到对应的业务接 入点 , 所述 AL PDU携带 AL PDU特征。
5、 根据权利要求 4所述的方法, 其特征在于, 所述获取需要发送的数 据包括依据来自所述分流配置信令的数据发送优先级获取数据, 其中所述 数据发送优先级包括业务接入点优先级和 /或业务数据流优先级。
6、 根据权利要求 4或 5所述的方法, 其特征在于, 所述将所述数据组 装成 AL PDU包括将所述数据复用组装为 AL PDU。
7、根据权利要求 2至 6中任一项所述的方法,其特征在于,所述 AL PDU 特征包括业务接入点标识、 业务数据流标识、 用户设备标识、 互联网协议 IP地址或端口号。
8、 一种数据分流方法, 其特征在于, 包括:
产生指示进行无线网络分流配置的分流配置信令;
将所述分流配置信令发送到用户设备。
9、 根据权利要求 8所述的方法, 其特征在于, 所述分流配置信令包括 允许分流配置和 /或禁止分流配置, 其中所述允许分流配置包括以下的一个或多个:
允许分流的业务接入点标识;
用于分流数据的网络服务节点标识;
允许分流的业务数据流的标识;
其中所述禁止分流配置包括以下的一个或多个:
需要禁止分流的业务接入点标识;
用于禁止分流数据的网络服务节点标识;
需要禁止分流的业务数据流的标识。
10、 根据权利要求 8或 9所述的方法, 其特征在于, 在所述产生指示 进行无线网络分流配置的分流配置信令之前, 还包括: 接收用户设备发送 的分流请求信令。
11、 根据权利要求 10所述的方法, 其特征在于, 所述分流请求信令包 括无线局域网接入点 WLAN AP通知消息和 /或无线局域网 WLAN信号质量 消息。
12、 根据权利要求 11所述的方法, 其特征在于, 所述 WLAN AP通知 消息包括检测到的 WLAN AP标识和 /或 WLAN AP的信号强度指示 , 所述 WLAN信号质量消息包括信号变差的 WLAN AP 标识和 /或信号变差的 WLAN AP信号强度指示。
13、 根据权利要求 10所述的方法, 其特征在于, 在所述接收用户设备 发送的分流请求信令之前, 还包括: 接收所述用户设备检测到的 WLAN AP 信号。
14、 根据权利要求 8所述的方法, 其特征在于, 在所述产生指示进行 无线网络分流配置的分流配置信令之前, 还包括: 与所述用户设备建立长 期演进 LTE空口连接; 或者在 LTE连接建立过程之中或之后接收所述用户 设备发送的分流能力信息, 所述分流能力信息用于指示所述用户设备支持 分流的能力。
15、 根据权利要求 14所述的方法, 其特征在于, 所述分流能力信息包 括: 是否支持无线网络分流, 以及所支持或不支持的无线接入技术。
16、 一种用户设备, 其特征在于, 包括:
分流控制单元, 用于接收基站发送的指示进行无线网络分流配置的分 流配置信令, 依据所述分流配置信令进行分流配置; 适配层单元, 用于依据所述分流配置对数据进行分流。
17、 根据权利要求 16所述的用户设备, 其特征在于, 所述适配层单元 包括控制模块, 所述控制模块控制所述适配层单元获取数据或者分流数据。
18、 根据权利要求 16或 17所述的用户设备, 其特征在于, 所述适配 层单元还包括逻辑信道优先级模块, 所述逻辑信道优先级模块在所述控制 模块的控制下按照来自所述分流配置信令的数据发送优先级获取数据, 包 括业务接入点优先级和 /或业务数据流优先级。
19、 根据权利要求 16至 18中任一项所述的用户设备, 其特征在于, 所述适配层单元还包括:
复用模块, 所述复用模块在所述控制模块的控制下将获取的数据复用 组装成适配层协议数据单元 AL PDU,并将所述 AL PDU发送给对应的业务 接入点;
解复用模块,所述解复用模块在所述控制模块的控制下将接收到的 AL PDU解复用, 并将解复用的数据传送到对应的业务接入点;
其中所述 AL PDU携带 AL PDU特征。
20、 根据权利要求 16至 19中任一项所述的用户设备, 其特征在于, 还包括数据包过滤单元, 所述数据包过滤单元用于依据 AL PDU特征识别 接收到的 AL PDU, 并将所识别的 AL PDU发送给所述适配层单元。
21、 根据权利要求 19或 20所述的用户设备, 其特征在于, 所述 AL PDU 特征包括业务接入点标识、 业务数据流标识、 用户设备标识、 互联网协议
IP地址或端口号。
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| CN102892143A (zh) | 2013-01-23 |
| EP2723120A4 (en) | 2014-12-03 |
| EP2723120B1 (en) | 2017-06-14 |
| US20140133298A1 (en) | 2014-05-15 |
| US9642031B2 (en) | 2017-05-02 |
| CN102892143B (zh) | 2015-11-25 |
| EP2723120A1 (en) | 2014-04-23 |
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