WO2014171699A1 - Procédé pour réaliser un fonctionnement en mode ralenti avec système de communication particulier dans un réseau comprenant de multiples systèmes de communication en interaction les uns avec les autres, et appareil s'y rapportant - Google Patents

Procédé pour réaliser un fonctionnement en mode ralenti avec système de communication particulier dans un réseau comprenant de multiples systèmes de communication en interaction les uns avec les autres, et appareil s'y rapportant Download PDF

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Publication number
WO2014171699A1
WO2014171699A1 PCT/KR2014/003239 KR2014003239W WO2014171699A1 WO 2014171699 A1 WO2014171699 A1 WO 2014171699A1 KR 2014003239 W KR2014003239 W KR 2014003239W WO 2014171699 A1 WO2014171699 A1 WO 2014171699A1
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WO
WIPO (PCT)
Prior art keywords
communication system
terminal
base station
message
indicator
Prior art date
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Ceased
Application number
PCT/KR2014/003239
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English (en)
Korean (ko)
Inventor
이은종
고현수
최혜영
한진백
조희정
정재훈
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LG Electronics Inc
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LG Electronics Inc
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Publication of WO2014171699A1 publication Critical patent/WO2014171699A1/fr
Anticipated expiration legal-status Critical
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is leader and terminal is follower
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is leader and terminal is follower using a pre-established activity schedule, e.g. traffic indication frame
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to wireless communication, and more particularly, to a method for performing a specific I communication system and an idle mode operation and a device therefor in a network interworking with a plurality of communication systems.
  • RAAT radio access technologies
  • Capabi Hty a Multi-RAT terminal having a capability of accessing a communication system
  • RAAT radio access technologies
  • Capabi Hty a Multi-RAT terminal having a capability of accessing a communication system
  • a connection ion is set to a specific RAT based on a terminal request and data transmission and reception are performed.
  • the multi-RAT terminal cannot simultaneously access multiple RATs. That is, even if the current UE has a Multi-RAT capabi Hty, data transmission and reception are not possible at the same time through different RATs. .
  • the conventional multi-AT technology does not require interworking between the WLAN and the cellular network, overall system efficiency is low.
  • the UE can simultaneously access the multiple RATs, simultaneous access to the multiple RATs is possible by supporting only the flow mobility / IP-flow mapping at the network level without control at the radio level. For this reason, the prior art did not require any control connection between the AP and the Byr network, and has been progressed based on the request of the terminal.
  • the technical problem to be achieved in the present invention is to provide a method for a terminal to perform an idle mode operation with a specific communication system in a network interworking a plurality of communication systems.
  • Another object of the present invention is to provide a terminal performing an idle mode operation with a specific communication system in a network in which a plurality of communication systems interoperate.
  • a method in which a terminal performs an idle mode operation with a specific communication system in a network interworking with a plurality of communication systems is connected to a Radio Resource Control (RC) with a first communication system Transmitting a scanning result of a base station of the second communication system to an interworking entity of the first communication system in a state of delegistration with the second communication system;
  • a first indicator instructing the terminal to perform an association process with a base station of the second communication system from an interworking entity and a second indicator instructing the terminal to operate in a power saving mode with the second communication system claim, including the step of transmitting the first message; wherein the second communication on the basis of the first indication of the first message, Performing an association process with a base station of the system, and entering the power saving mode from the disconnected mode with the C2 communication system based on the second indicator of the first message.
  • pre-association with the interworking entity of the first communication system and the terminal performs an association process with the base station of the second communication system and enters the power saving mode. Whether the procedure supports
  • the method may further include negotiating.
  • the first message is identifier information for the second communication system base station to perform an association process with the terminal, the terminal performs an association process with a base station of the second communication system and the power saving mode.
  • the apparatus may further include at least one of information on a deadline time of a pre-association process and information on a listening interval with a base station of the second communication system.
  • the base station of the second communication system may be a preferred base station of the terminal in the second communication system.
  • the method may further include starting a time limit timer of a pre-association process when the terminal receives the first message.
  • the method may further include transmitting, by the terminal, a third indicator for notifying the base station of the second communication system to enter the power saving mode.
  • the interworking entity of the first communication system may be one of an eNode B, a Mobility Management Entity ()), and an InterWorking Management Entity (I ⁇ E).
  • the first message including the second indicator may be transmitted from an interworking entity of the first communication system.
  • the information on the listening interval may indicate that the power saving mode is switched to the power saving mode immediately after completing the association, and the terminal may receive a paging message from the first communication system.
  • the method may further include a second message including an indicator indicating that the procedure for entering the power saving mode and association with a base station of the second communication system is completed as an interworking entity of the first communication system. Transmitting; And receiving a voice response message for the second message from the interworking entity of the first communication system.
  • the method may further include notifying that a periodic broadcast signal of the second communication system is to be received from an interworking entity of the first communication system when there is downlink data to be transmitted through the second communication system. 2 receiving a fourth indicator indicating that there is downlink data to be transmitted through the communication system
  • the method may further include operating in an awake state with the base station.
  • the first communication system may be a cellular communication system and the second communication system may be a wireless LAN communication system.
  • a terminal performing an idle mode operation with a specific communication system in a network interworking with a plurality of communication systems is connected with a first RRC (Radio Resource Control) with a first communication system. And transmits a scanning result for the base station of the second communication system to an interworking entity of the first communication system in a degistration mode with the second communication system, and interworks with the first communication system.
  • RRC Radio Resource Control
  • a first indicator instructing the terminal to perform an association process with a base station of the second communication system from a working entity and a second indicator instructing the terminal to operate in a power saving mode with the second communication system A transmitter configured to transmit a first message comprising: and a phase based on the first indicator of the first message; And a processor configured to perform an association process with a base station of a second communication system and to enter the power saving mode from the disconnected mode with the second communication system based on the second indicator of the first message.
  • the processor may pre-associate an interworking entity of the first communication system with the terminal to perform an association process with a base station of the second communication system and enter the power saving mode. You can control to negotiate whether or not a procedure is supported.
  • the terminal may further include a receiver configured to receive the first message from an Internet 3 ⁇ 4 entity of the first communication system when there is no downlink data to be transmitted to the second communication system.
  • the transmitter is configured to send a second message to the interworking entity of the first communication system including an indicator indicating that the procedure for entering the power saving mode and the association with the base station of the second communication system has been completed;
  • the receiver answers the second message. And receive a message from the interworking entity of the first communication system.
  • the receiver informs the reception of the periodic broadcast signal of the second communication system from the interworking entity of the first communication system when there is downlink data to be transmitted through the second communication system or the first communication signal.
  • Receiving a fourth indicator indicating that there is downlink data to be transmitted through a second communication system and the processor receives a periodic broadcast signal of the second communication system based on the fourth indicator to communicate with a base station of the second communication system;
  • the controller may switch to an awake state or receive the fourth indicator to operate in an awake state with a base station of the second communication system.
  • FIG. 1 is a block diagram showing the configuration of a base station 105 and a terminal 110 in a wireless communication system 100;
  • E-UMTS Evolved Universal Mobile Telecommunications System
  • 3A shows a general structure of a general E-UTRAN and a general EPC It is a block diagram.
  • FIG. 3B is a block diagram illustrating a user-plane protocol stack for an E—UMTS network.
  • 3C is a block diagram illustrating a control plane protocol stack for an E—UMTS network.
  • FIG. 4 is an exemplary diagram for explaining IP flow based WiFi mobility.
  • FIG. 5 is a diagram illustrating a network structure for explaining an interworking structure between a first communication system (ie, a cellular communication system) and a second communication system (wireless LAN communication system).
  • a first communication system ie, a cellular communication system
  • a second communication system wireless LAN communication system
  • FIG. 6 is a diagram illustrating a network structure of WiFi-Cellular interworking according to the present invention.
  • FIG. 7 is an exemplary diagram for describing a scenario of WiFi—cellular convergence network.
  • FIG. 8 is a diagram illustrating Reassociat ion Procedures in an IEEE 802.11 WLAN system.
  • FIG. 9 is a diagram illustrating a attach and Mult i -RAT capability negotiation process of the Muhi -RAT terminal 0 i.
  • FIG. 10 is an example for explaining a process of allowing an interworking entity to perform a WiFi connection (or association) of a Mult i-RAT terminal in advance (WiFi pre association procedure) and a new power saving mode of WiFi. Drawing.
  • FIG. 11 is a diagram illustrating an example of a new WiFi pre—association procedure proposed by the present invention.
  • the present invention may be practiced without these specific details.
  • the mobile communication system is a 3GPP LTE, LTE-A system, except for the specific matters of 3GPP LTE, LTE ⁇
  • a terminal collectively refers to a mobile or fixed user terminal device such as a UE Jser Equipment (MS), a Mobile Station (MS), an Advanced Mobile Station (AMS), etc. It is assumed that an arbitrary node of a network terminal that communicates with a terminal, such as an eNode B, a base station, and an access point (AP), is collectively assumed.
  • MS UE Jser Equipment
  • MS Mobile Station
  • AMS Advanced Mobile Station
  • AP access point
  • a user equipment may receive information from downlink (downlink) from a base station, and the terminal may also transmit information through uplink (UpHnk).
  • Information transmitted or received by the terminal includes data and various control information, and various physical channels exist according to the type and purpose of the information transmitted or received by the terminal.
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time .division multiple access
  • SC-FDMA single carrier frequency division multiple
  • CDMA may be implemented by a radio technology such as UTRAOJniversal Terrestrial Radio Access) or CDMA2000.
  • TDMA may be implemented in a wireless technology such as Global System for Mobile Communication (GSM) / Gener a 1 Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE).
  • GSM Global System for Mobile Communication
  • GPRS Packet Radio Service
  • EDGE Enhanced Data Rates for GSM Evolution
  • 0FDMA may be implemented in a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, E-UTR Evolved UTRA.
  • Wi-Fi IEEE 802.11
  • WiMAX IEEE 802.16
  • WiMAX WiMAX
  • E-UTR Evolved UTRA.
  • the 3rd Generation Partnership Project (3GPP) LTEdong term evohi on (E-UMTS) using E JTRA and part of the 3GPP employ 0FDMA in downlink and SC—FDMA in uplink.
  • LTE-A Advanced is an evolution of 3GPP LTE.
  • FIG. 1 is a block diagram illustrating the configuration of a base station 105 and a terminal 110 in a wireless communication system 100.
  • wireless communication system 100 Simplify wireless communication system 100. Although one base station 105 and one terminal (including 110KD2D terminal) are shown for illustration, the wireless communication system 100 may include one or more base stations and / or one or more terminals.
  • the base station 105 includes a transmit (Tx) data processor 115, a symbol modulator 120, a transmitter 125, a transmit / receive antenna 130, a processor 180, a memory 185. And a receiver 190, a symbol demodulator 195, and a receive data processor 197. And, the terminal 110 transmits (Tx) data processor 165, symbol modulator 175, transmitter 175, transmit and receive antenna 135, processor 155, memory 160, receiver 140, symbol Demodulator 155 and receive data processor 150.
  • the transmit and receive antennas 130 and 135 are shown as one at the base station 105 and the terminal 110, respectively, the base station 105 and the terminal 110 are provided with a plurality of transmit and receive antennas.
  • the base station 105 and the terminal 110 according to the present invention support the MIMXMu TM tiple Input Multiple Output (System) system.
  • the base station 105 according to the present invention may support both the SU-MIM0 (Single User-MIMO) MU-MIM0 (Mul t User-MIMO) scheme.
  • the transmit data processor 115 receives the traffic data, formats the received traffic data, codes it, interleaves and modulates (or symbol maps) the coded traffic data, and modulates symbols. ("Data symbols").
  • the symbol modulator 120 receives and processes these data symbols and pilot symbols to provide a stream of symbols.
  • the symbol modulator 120 multiplexes the data and pilot symbols and sends it to the transmitter.
  • each transmission symbol may be a data symbol, a pilot symbol, or a signal value of zero.
  • pilot symbols may be sent continuously.
  • the pilot symbols may be frequency division multiplexed (FDM), orthogonal frequency division multiplexed (OFDM), time division multiplexed (TDM), or code division multiplexed (CDM) symbols.
  • Transmitter 125 receives the stream of symbols and converts it into one or more analog signals, and further adjusts (eg, amplifies, filters, and upconverts) these analog signals. Also, a downlink signal suitable for transmission over a wireless channel is generated, and then, the transmit antenna 130 transmits the generated downlink signal to the terminal.
  • the receiving antenna 135 receives the downlink signal from the base station and provides the received signal to the receiver 140.
  • Receiver 140 adjusts the received signal (eg, filtering, amplifying, and frequency downconverting), and digitizes the adjusted signal to obtain samples.
  • the symbol demodulator 145 demodulates the received pilot symbols and provides them to the processor 155 for channel estimation.
  • the symbol demodulator 145 also receives a frequency equal answer estimate for the downlink from the processor 155, performs data demodulation on the received data symbols, and performs the data (which are estimates of the transmitted data symbols). Obtain symbol estimates and provide data symbol estimates to receive (Rx) data processor 150. Receive data processor 150 demodulates (ie, symbol de-maps), deinterleaves, and decodes the data symbol estimates to recover the transmitted traffic data.
  • symbol demodulator 145 and receive data processor 150 are complementary to the processing by symbol modulator 120 and transmit data processor 115 at base station 105, respectively.
  • the terminal 110 is on the uplink, the transmit data processor 165 processes the traffic data to provide data symbols.
  • the symbol modulator 170 may receive and multiplex data symbols, perform modulation, and provide a stream of symbols to the transmitter 175.
  • Transmitter 175 receives and streams of symbols
  • the transmit antenna 135 transmits the generated uplink signal to the base station 105.
  • an uplink signal is received from the terminal 110 through the receiving antenna 130, and the receiver 190 processes the received uplink signal to obtain samples.
  • the symbol demodulator 195 then processes these samples to provide the received pilot symbols and data symbol estimates for the uplink.
  • the received data processor 197 processes the data symbol estimates to recover the traffic data sent from the terminal 110.
  • Processors 155 and 180 of the terminal 110 and the base station 105 respectively instruct (eg, control, coordination, management, etc.) operation at the terminal 110 and the base station 105, respectively.
  • Respective processors 155 and 180 may be connected with memory units 160 and 185 that store program codes and data.
  • the memory 160, 185 is coupled to the processor 180 to store the operating system, the application, and the genera files.
  • the processors 155 and 180 may also be referred to as controllers, microcontrollers' microprocessors, microcomputers, or the like. Meanwhile, the processors 155 and 180 may be implemented by hardware or firmware, software, or a combination thereof.
  • ASICsUppHcation specific integrated circuits DSICs
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGAs field progr mmable gate arrays and the like
  • firmware or software when implementing embodiments of the present invention using firmware or software, firmware or software may be configured to include a module, procedure, or function that performs the functions or operations of the present invention.
  • Firmware or software configured to perform the above may be provided in the processors 155 and 180 or stored in the memory 160 and 185 to be driven by the processor 155 and 180.
  • the layers of the air interface protocol between a terminal and a base station in a wireless communication system are well known OSKopen system in a communication system.
  • the 10 can be classified into a first layer (L1), a second layer (L2), and a third layer (L3) based on the lower three layers of the interconnection model.
  • the physical layer belongs to the first layer and provides an information transmission service through a physical channel.
  • a Radio Resource Control (RRC) layer belongs to the third layer and provides control radio resources between the UE and the network.
  • the terminal and the base station may exchange RRC messages through the wireless communication network and the RRC layer.
  • the processor 155 of the terminal and the processor 180 of the base station process signals and data except for a function of receiving or transmitting a signal and a storage function of the terminal 110 and the base station 105, respectively.
  • the processor 155 and 180 will not be specifically described below.
  • a series of operations such as a function of receiving or transmitting a signal and a data processing other than a storage function are performed.
  • FIG. 2 is a diagram illustrating a network structure of an Evolved Universal Mobile Telecommunications System (E-UMTS).
  • E—UMTS may be called as LTE system.
  • the system may be widely deployed to provide various communication services, such as voice ALV packet data, and is generally configured to function based on various techniques to be described and described in detail with reference to the following figures.
  • the E-UMTS network includes an Evolved UMTS terrestrial radio access network (E-UTRAN), an Evolved Packet Core (EPC), and one or more terminals 10.
  • E-UTRAN includes one or more base stations 20.
  • ⁇ E / SAE gateway 30 provides the terminal 10 with endpoint and mobility management functions of the session.
  • the base station 20 and the E / SAE gateway may be connected via an S1 interface.
  • Terminal 10 is a device carried by a user and may also be referred to as a mobile station (MS), user ' terminal (UT), subscriber station (SS) or wireless device.
  • MS mobile station
  • UT user ' terminal
  • SS subscriber station
  • Base station 20 is generally a fixed station that communicates with terminal 10.
  • a base station may be called an access point (AP).
  • AP access point
  • a base station includes a transmitter and a processor, among other components, and is configured to operate in accordance with the various techniques described herein. .
  • a plurality of terminals 10 may be located in one cell.
  • One base station 20 is generally arranged per cell.
  • An interface for transmitting user traffic or control traffic may be used between the base stations 20.
  • downlink 1 indicates communication from the base station 20 to the terminal 10
  • uplink indicates communication from the terminal to the base station.
  • ⁇ E / SAE gateway 30 is a cipher of distribution of paging messages, security control, idle mobility control, SAR bearer control and non-access stratum (NAS) signaling to base stations 20 ing) and integrity (integrity protection).
  • the SAE gateway 30 provides various functions including termination of U ⁇ plan packets for paging reasons, switching of the Q-plan to support terminal mobility.
  • the ⁇ E / SAE gateway 30 may be referred to herein simply as a “gateway”. However, it can be understood that such a structure may include both a VE gateway and a SAE gateway.
  • a plurality of nodes may be connected between the base station 20 and the gateway 30 via the S1 interface.
  • the base stations 20 may be connected to each other via a ⁇ 2 interface, and neighboring base stations may have a meshed network structure with a ⁇ 2 interface.
  • 3A is a block diagram showing a general structure of a general E—UTRAN and a general EPC.
  • the base station is selected for the gateway 30, routing to the gateway when Radio Resource Control (RRC) active, scheduling and transmission of paging messages, scheduling and transmission of broadcast channel (BCCH) information downlink
  • RRC Radio Resource Control
  • BCCH broadcast channel
  • the gateway 30 is responsible for paging initiation, LTE_IDLE state management, user plane calculation, SAE bearer management, and non-access stratum (NAS) signaling. It can perform the functions of integrity protect ion.
  • 3B and 3C are block diagrams illustrating a user-plane protocol and control plane protocol stack for an E—UMTS network.
  • the protocol layers are divided into a first layer (L1), a second layer (L2), and a third layer (L3) based on three lower layers of the open system interconnect (0SI) standard model. Can be divided.
  • the first layer (or physical layer (PHY)) provides the information transmission service to the upper layer using a physical channel.
  • the physical layer is connected to a MAC layer located at a higher level through a transport channel, and data between the MAC layer and the physical layer is transmitted through a transport channel.
  • Data is transmitted over the physical channel 21 between different physical layers, i.e., between the physical layers of the transmitting side and the receiving side (for example, between the physical layers of the terminal 10 and the base station 20).
  • the MAC layer of Layer 2 provides a service to the RLC layer, which is a higher layer, through the logical channel.
  • the MAC layer of Layer 2 (L2) supports reliable data transmission.
  • the RLC layer shown in FIGS. 3B and 3C is shown that if the MAC RLC functions are implemented and performed in the MAC layer, the RLC layer itself is not needed.
  • the PDCP layer of Layer 2 employs Internet Protocol (IP) packets, such as IPv4 or IPv6, which can be efficiently transmitted over a wireless interface with relatively small bandwidth, thereby providing unnecessary control information to the transmitted data. Header compression is performed to reduce.
  • IP Internet Protocol
  • the RRC layer located at the lowest part of the third layer (L3) is defined only in the control plane and configures, reconstructs, and carries radio channels (RBs) of logical channels, transport channels, and physical channels. Control in the release relationship.
  • the radio bearers refer to a service provided to the second layer (L2) for data transmission between the terminal (terminal) and the E-UTRAN.
  • the RLC and MAC layers (terminated at base station 20 on the network side) are scheduled, ARC Autoinatic Repeat reQuest),
  • the PDCP layer (terminated at base station 102 on the network side) may perform user plane functions such as header compression, integrity protection, and ciphering.
  • the RLC and MAC layers perform the same functions as the control plane.
  • the RRC layer may perform functions such as broadcast, paging, RRC connection management, radio bearer (RB) control, mobility functions, and terminal measurement reporting and control.
  • RB radio bearer
  • the NAS control protocol terminated at the ⁇ E gateway 30 on the network side may perform functions such as SAE bearer management, authentication, LTE_IDLE mobility handling, paging start in LTEJDLE, and security control for signaling between the gateways and the terminal 10.
  • SAE bearer management authentication, LTE_IDLE mobility handling, paging start in LTEJDLE, and security control for signaling between the gateways and the terminal 10.
  • the NAS control protocol may use three different states: first if there is no RRC entity, LTE_DETACHED state, second if there is no RRC connection but the minimum terminal information is stored. LTE ⁇ IDLE state. Third, RRC connection is established, LTE_ACTIVE state.
  • the RRC state may be divided into two different states, such as RRCJDLE and RRC—CONNECTED.
  • the terminal 10 may receive a broadcast of paging information and system information while the terminal 10 specifies a discontinuous reception (DRX) configured by the NAS, and the terminal 10 Is assigned an identifier (ID) for uniquely identifying the terminal in the tracking area.
  • DRX discontinuous reception
  • ID an identifier
  • the RRC_IDLE state there is no RRC context stored in the base station 20.
  • the UE 10 specifies a paging DRX cycle.
  • the terminal 10 monitors a paging signal in a specific paging case of every terminal specific paging DRX cycle.
  • the terminal 10 has an E—UTRAN R C connection and context in the E ⁇ UTRAN to transmit and / or receive data from / to a network (base station) that is enabled. In addition, the terminal 10 receives the channel quality information and the feedback information.
  • the E-UTRAN knows the cell to which the terminal 10 belongs.
  • the network can transmit and / or receive data to / from the terminal 10, the network can control the mobility (handover) of the terminal 10, and the network performs cell measurements for neighboring cells. can do.
  • FIG. 4 is an exemplary diagram for explaining IP flow based WiFi mobility.
  • IFOM IP Flow Mobility: 3GPP (Rel-10) standard describes 3G / WiFi Seamless Off load, WLAN offloading technology of DSMIPv6 based IP Flow unit, DSMIPv6 (Dual Stack Mobile IPv6) terminal and network It provides a solution that supports IPv4 and IPv6 simultaneously.
  • DSMIPv6 Device Stack Mobile IPv6
  • the client-based device detects its movement and informs the agent.
  • MIP technology is an agent that manages mobility of mobile node, and there exists Flow Binding Table and Binding Cache table.
  • IF0M uses only DSMIFV6 because of technical problem that IP flow unit is difficult to manage.
  • MAPC0N Multi Access PDN Connectivity: Simultaneous multiple PDN connectivity to different APNs, and can be used as a protocol independent technology, PMIFV6, GTP, DSMIPv6. All data flows that were being transmitted through one PDN are moved. '
  • FIG. 5 is a diagram illustrating a network structure for explaining an interworking structure between a first communication system (ie, a seller communication system) and a second communication system (wireless LAN communication system).
  • a first communication system ie, a seller communication system
  • a second communication system wireless LAN communication system
  • an LTE system which is one of the cellular communication systems corresponding to the first communication system
  • a WiFi system which is one of the WLAN communication systems corresponding to the second communication system
  • a backbone network (eg, P ⁇
  • a backhaul control connection between the AP and the eNB through an Evolved Packet Core (EPC), or there may be a wireless control connection between the AP and the eNB.
  • EPC Evolved Packet Core
  • a first communication system (or first communication) using a first wireless communication scheme through interworking between a plurality of communication networks Network) and a second communication system (black or second communication network) using a second wireless communication method can be simultaneously supported.
  • the first communication network or the first communication system is referred to as a primary network or a primary system, respectively
  • the second communication network or the second communication system is referred to as a secondary network or a secondary system, respectively.
  • the UE may be configured to simultaneously support LTE (or LTE ⁇ A) and WiFi (local area communication systems such as WLAN / 802.11).
  • LTE Long Term Evolution
  • WiFi local area communication systems such as WLAN / 802.11.
  • Such a terminal (UE) may be referred to herein as a multi-system capability UE.
  • the primary system has wider coverage and may be a network for transmitting control information.
  • An example of a primary system may be a WiMAX or LTE (LTE-A) system.
  • the secondary system is a network having a small coverage and may be a system for data transmission.
  • the secondary network may be, for example, a WLAN system such as WLAN or WiFi.
  • the entity that manages interworking assumes that the cell is an entity in the network and assumes that interworking functions are implemented in the following three entities.
  • Mobility Management Entity (MME)-Reuse existing entity
  • Interworking function is interworking that can occur between eNB—UE or eNB-AP.
  • the entity managing interworking stores / manages AP information.
  • the eNB / ⁇ E / IWME stores / manages information of APs under its coverage.
  • An AP that is an access point of a secondary system (eg, WiFi) and a base station (eNB) that is an access point of a primary system (eg, a cellular communication system such as an LTE system or a WiMAX system) are connected to each other wirelessly. Assume that a connection is established on the phase.
  • an AP having a radio interface with an eNB is also called an eAP.
  • the eAP should support not only 802.11 MAC / PHY, but also LTE protocol stack or WiMAX protocol stack for communication with the eNB, and act as a terminal with the eNB and can communicate with the eNB.
  • FIG. 6 is a diagram illustrating a network structure of WiFi-Cel hilar interworking according to the present invention.
  • the technology of the present invention allows a dual mode or multi-RAT terminal to use a WiFi-ceiluIar convergence network more efficiently in an environment where a terminal capable of simultaneously transmitting and receiving WiFi and cellular networks exists.
  • the network can manage the AP's information in the following four ways.
  • the eNB means controlling the AP similarly to a general UE using a wireless control connection with the AP.
  • eNB means controlling the AP using a radio control connection with the AP.
  • 098 means controlling the AP using a control connection between E and an AP (ie, a secondary system).
  • I ⁇ E means to control the AP by using a control connection between the AP (that is, secondary system).
  • FIG. 7 is an exemplary diagram for explaining a scenario of a WiFi-Cel lular converged network.
  • the scenario 1 of FIG. 7 is a cell-only access scenario of a terminal, and for the automatic WiFi switching / simultaneous transmission in a state in which the terminal is connected only to a cell network, a definition of a prior technology is necessary.
  • AP information management for interworking is performed at the network level (cellular-WiFi), and WiFi discovery and WiFi network access are performed at the device level (cellular-device-WiFi).
  • 2 -1 to 2— 3 respectively indicate the WiFi automatic switching of the user plane (U-Plane), the WiFi automatic switching of the flow, the WiFi automatic switching of the bearer, and the WiFi automatic switching of data.
  • bandwidth segregation is automatic switching for each flow (service / IP flow), such as 2 -2, and different flows are transmitted through different RATs.
  • flow-by-flow automatic switching can be one or more service / IP flow (s). That is, the conversion may be a flow unit (2 -2-1) or a data radio (or EPS) bearer switching (2 -2-2).
  • Bandwidth aggregation enables transmission through different RATs in data units even with the same flow as in 2 ⁇ 3.
  • the cellular link control is possible based on WiFi as in the scenario.
  • Control of paging or radio link failure (RLF) associated with a cell link can be received through a WiFi link.
  • RLF radio link failure
  • connection procedure Connect ion Procedures of IEEE 802.11 WLAN
  • IEEE 802.11 WLAN connection procedure
  • the scanning step is divided into passive scanning and active scanning, and the terminal (for example, the STA) searches for the neighbor AP in the scanning step to store information and receives the beacon frame of the neighbor AP. And transmit and receive probes and probe response frames.
  • the next step is a join step.
  • the AP performs authentication unconditionally, and the shared key authentication procedure performs authentication by checking the shared secret key. Send and receive an authentication frame.
  • the UE is assigned an Association IDUdentif ier) through an Association Response frame, and transmits and receives an Association Request and Response frame.
  • FIG. 8 is a diagram illustrating Reassociat ion Procedures in an IEEE 802.11 WLAN system.
  • Reassociat ion occurs when a terminal (STA) moves to another AP coverage.
  • the terminal transmits the information about the MAC address of the current AP to the New AP through the reassociation request frame.
  • IAP Inter ⁇ AP Protocol
  • the new AP requests the IAPP to relay the information of the old AP, and the old AP deletes the AKKAssociation Id) of the terminal.
  • IAPP (Inter-AP Protocol) 802.1 ⁇ is a protocol for exchanging context between APs through a DS in a WLAN system.
  • the AP caches the exchanged PMK information and uses an identifier (keylD) of a key used by the terminal in the old AP.
  • keylD identifier
  • the AP skips the authentication process using the cached PMK and performs key exchange.
  • Disassociation is a notification, not a request.
  • the AP needs to disassociate the STAs to enable the AP to be removed from the network for service or for other reasons.
  • the STAs attempt to disassociate.
  • the disassociation frame is transmitted, which contains a reason code.
  • Beacon frame The transmission may be delayed if the channel is busy at the time to be transmitted periodically but only in the AP.
  • the frame control includes Duration, DA, SA, BSSID, Fragment number, Sequence information, and the frame body includes Time stamp, beacon interval, capability information, ⁇ SSID, Supported rates, DS parameter Set, TIM ⁇ IEs.
  • TIM is Traffic Indication MAP, Doze It is used as an indication (indicat ion as AID) to wake up the terminal in mode.
  • Probe request frame used in active scanning.
  • the frame body contains ⁇ SSID, Supported Rates ⁇ IEs.
  • Probe response frame A probe response is sent to the probe.
  • Frame control includes Duration, DA, SA, BSSID, fragment number, Sequence, and frame body includes Time stamp, beacon interval, capability information, ⁇ SSID, supported rate, DS parameter Set ⁇ IEs.
  • Authentication frame used in authentication request and response, and is divided into Authentication transaction Sequence because the format is the same.
  • Frame control includes Duration, DA, SA, BSSID, Fragment number, Sequence, and Frame body contains Authentication Algorithm Number, Status code, challenge text IE.
  • Authentication Algorithm Number Open System, Shared Key, Fast BSS Transition
  • Association request frame includes a listen interval that specifies how long to stay in power saving mode when requesting association.
  • Frame control includes Duration, DA, SA, BSSID, Fragment number, Sequence, and frame body contains Capability information, Listen Interval, ⁇ SSID, Supported Rates ⁇ IEs.
  • Association response frame transmitted in response to an association request and assigned an AID value.
  • Frame control includes Duration, DA, SA, BSSID, fragment number, Sequence, and frame body contains Capability information, Status Code, Association ID, Supported rates IE.
  • Reassociat ion request frame includes a listen interval that specifies the length of time to stay in the power saving mode in the reassociation request.
  • Frame control includes Duration, DA, SA, BSSID, Fragment number, Sequence, Frame body is Capability Information, Listen Interval, Current AP address, ⁇ SSID, Supported Rates ⁇ IES.
  • Reassociation response frame Association response ⁇
  • Frame control contains Duration DA, SA, BSSID, fragment number, Sequence, and frame body includes Capability information, Status Code, Association ID, and Supported rates IE.
  • the Fr me control includes Duration, DA, SA, SSID IE, fragment number, Sequence, and frame body contains Reason Code.
  • Doze mode Farway of the terminal; In order to save power, this mode stops the transceiver for a certain time when it does not transmit or there is no data to be transmitted to it.
  • the traffic indication control information eg, Traffic Indication MAP IE message
  • the UE wakes up and transmits its AID in the duration region of the PS-Poll message.
  • the AP delivers buffering data to the terminal. If more than one buffered frame is set, the data bit may be set to 1 to inform the UE that there are more frames.
  • the description of the IEEE 802.11 WLAN described above may be applied in the context of the present invention.
  • the conventional inter RAT technology is designed based on a request of a terminal, does not require interworking between the WLAN and the cell network, and a specific network server manages the WLAN information. Enable inter RAT handover.
  • the terminal can be connected to multiple RATs simultaneously.
  • the prior art does not require any control connection between the AP and the cellular network, and enables connection to the multiple RAT based on the request of the UE.
  • Such a prior art does not accurately grasp the situation of the network, there is a limit to increase the overall network efficiency by selecting the terminal-oriented RAT.
  • the network may help the terminal select an optimal RAT or AP, and for this purpose, the network may request information of a secondary system such as WiFi from the terminal.
  • a terminal that simultaneously accesses two different RATs is called a Mu i-RAT terminal.
  • FIG. 9 is a diagram illustrating an attach and multi-RAT capability negotiation process of a Multi—RAT terminal.
  • a Multi—RAT UE performs an attach process with an eNB, a UE E, and an IWE of a cellular network (attach request, attach accept, etc.). After completing the attach process, the Multi-RAT terminal may generate a UL / DL data tunnel (EPS bearers-default EPS bearers).
  • EPS bearers UL / DL data tunnel
  • the Multi-RT RAT terminal may then perform a MULTI-RAT capability negotiation process with the cellular network (eg, IWE). That is, IWE is sent to the terminal Multi- RAT MULTI ⁇ RAT capability request request message, In response, the Multi-RAT Multi RAT mobile station sends a capability response message including the preferred AP list. After that, the IWE transmits a Multi-RAT capability complete message to the UE.
  • IWE MULTI-RAT capability negotiation process with the cellular network (eg, IWE). That is, IWE is sent to the terminal Multi- RAT MULTI ⁇ RAT capability request request message, In response, the Multi-RAT Multi RAT mobile station sends a capability response message including the preferred AP list. After that, the IWE transmits a Multi-RAT capability complete message to the UE.
  • the preferred AP list may be transmitted in advance in the initial connection with the IWE (eg, WiFi capability negotiation during or after connect ion (re) estabnshment) as one of the WiFi-related capabilities of the UE.
  • IWE eg, WiFi capability negotiation during or after connect ion (re) estabnshment
  • the Multi-RAT terminal may scan the APs and transmit information on the detected AP list (or Preferred AP list among the detected AP list) to the IWE.
  • the information on the Preferred AP may be AP ID such as SSHKService Set IDentif ier / Basic Service Set IDentif ier (BSSID) for AP that Multi-RAT terminal frequently accesses or stays for a long time. It may be an SSID / BSSID of a public AP or an SSID / BSSID of a private AP.
  • the IWE may determine the WiFi network access based on the preferred AP list received from the MLII RAT terminal. As such, FIG. 9 illustrates a WiFi capability negotiation process and a decision of accessing a Preferred AP based WiFi network.
  • the Multi-RAT terminal has completed the connection to the WiFi in advance, it is proposed to instruct to switch to the WiFi power saving mode while instructing the pre-association in order to minimize the terminal battery consumption.
  • the pre association it is preferably performed when a preferred AP (Preferred AP) of the Multi-RAT terminal is detected.
  • the WiFi pre-associat ion of the Multi-RAT terminal is indicated, and at this time, a new WiFi idle for minimizing the power of the Multi-RAT terminal.
  • a mod procedure Hereinafter, the newly proposed WiFi pre-associat ion and the new power saving mode of WiFi will be described.
  • 10 is a process for allowing an interworking entity (eg, eNB, ⁇ E, new entity in cellular network) to perform Wi-Fi connection of a UE in advance (WiFi pre association procedure) and new power saving of Wi-Fi. It is an exemplary diagram for explaining the mode. '
  • the Multi-RAT terminal is connected with the cell network.
  • the beacon signal which is a signal that is periodically broadcasted, may be received from at least one AP.
  • the Mult i-RAT terminal may perform WiFi scanning to detect an AP and transmit a WiFi scanning result to a cellular network (eg, IWE).
  • a cellular network eg, IWE.
  • the Overr network for example, IWE
  • the preferred AP to the multi-RAT terminal A WiFi pre-attach request message indicating a WiFi pre-attach to the network can be transmitted.
  • the WiFi pre-attach request message is provided.
  • Multi In order to minimize the power of the RAT terminal, the WiFi pre-attach may be instructed, and upon completion of the pre-attach, the Multi-RAT terminal may instruct to enter the WiFi power saving mode. In the present invention, such a process is referred to as WiFi pre-associat ion of the Multi-RAT terminal.
  • the IWE of the cellular network instructs to enter the WiFi power saving mode of the Multi-RAT terminal, and when the terminal enters the WiFi power saving mode by such an instruction, a listening interval (listening interval) is different from the conventional method.
  • a listening interval listening interval
  • the Multi-RAT terminal may transmit a WiFi pre—attach complete message indicating the completion of the WiFi pre-attach to the IWE. Then, the IWE may recognize that the Multi-RAT terminal is WiFi attached but has entered the WiFi power saving mode. In response to the WiFi pre-attach complete message, the IWE may send an AC message (eg, a WiFi pre-attach complete ACK message) to the Multi-RAT terminal.
  • an AC message eg, a WiFi pre-attach complete ACK message
  • FIG. 11 the case of instructing the switch to the WiFi power saving mode while instructing the pre-associat ion will be described in more detail.
  • 24 11 is a diagram illustrating an example of a new WiFi pre-association procedure proposed by the present invention.
  • a Mul — RAT terminal may perform a MULTI-RAT capability negotiation process with a cellar network (eg, IWE).
  • a cellar network eg, IWE
  • the capability of pre-association can be set during the process by which the multi-RAT UE neut iat ionizes the IWE and its MultiRAT related capability. . That is, when the Multi-RAT terminal sends a MULT I -RAT capability negotiation request message to the IWE, the IWE sends a Multi-RAT capability negotiation response message to the Multi-RAT terminal in response.
  • a pre-association proposed in the technique of the present invention it is preferable to exchange in advance between the Multi-RAT terminal and the IWE whether the procedure can be performed.
  • a pre-association related procedure may be performed.
  • WiFi Pre-Association support (1 bit) should be defined, for example, if a 1-bit value of 0 indicates that pre-association cannot be performed, and if 1 indicates that pre-association can be performed. It is.
  • the Multi-RAT terminal and the IWE may transmit information including a preferred AP in a MultiRAT Capability Negotiation related message.
  • the multi-RAT terminal may inform that the pre-association is supported by transmitting by setting the WiFi pre-associat ion support (1 bit) to 1 in the multi-RAT capability negotiation request message.
  • the RAT terminal may receive a beacon signal, which is a signal that is periodically broadcasted from at least one AP, and perform WiFi scanning to perform a WiFi scanning result with a cellular network (eg, IWE).
  • a beacon signal which is a signal that is periodically broadcasted from at least one AP
  • WiFi scanning to perform a WiFi scanning result with a cellular network (eg, IWE).
  • the cellular network for example, IWE
  • a pre-attach request message can be sent.
  • the attach request message may include the following parameters.
  • Pre01 associat ion deadline timer may be set to a time value thereafter in consideration of the time required for the Multi-RAT terminal to complete the switching between the AP and the associat ion and power saving mode.
  • the Multi-RAT terminal Upon receiving the WiFi pre-attach request message, the Multi-RAT terminal performs pre-associat ion to the AP for the corresponding BSSID / SSID. And, when receiving the WiFi pre-attach request message, the Multi-RAT terminal is a pre-associat ion deadline timerline ⁇ ] 2] - ⁇ 3 ⁇ 4 ⁇ .
  • the Multi-RAT terminal receiving the WiFi pre-attach request message is an Association.
  • the listening interval of the Association request message may be set during the association process with the AP with reference to the corresponding WiFi listening interval value. If the WiFi listening interval is set to "0" or a reserved value pre-appointed with the IWE, there is no listening interval to WiFi by sending the Association request message and receiving the Association response message from the AP (i.e., the cellular Receive paging via network) You can switch to WiFi power saving mode.
  • PS mode is transferred to the PS mode to the AP through a WiFi PS mode switching method such as transmitting a null data frame set to '1'. You can immediately announce the transition.
  • WiFi PS mode indication is 1, by specifying the WiFi listening interval, the Multi-RAT terminal can more efficiently use the power saving mode to WiFi.
  • the WiFi pre-attach request message is used, transmission of the BSSID / SSID for the association AP is implicitly (implicit ly) power with the corresponding AP. saving mode indication and WiFi listening interval 0 ] "0" or a message indicating that the cell is set to a reserved value for receiving paging through the network.
  • the mult i ⁇ RAT terminal completes the association when the message is received. Afterwards, it can mean switching to WiFi power saving mode without listening interval. That is, when the WiFi pre-attach request message is defined, only the BSSID / SSID for the pre-associat ion AP may be transmitted, or the WiFi listening interval may be explicitly transmitted as necessary.
  • the Multi-RAT terminal transmits a WiFi (pre) attach response message or a WiFi (pre) attach complete message to the IWE when both the previously defined AP and pre-association are successfully performed. Must be sent before is expired, and if the pre-association deadline timer expires, the pre-association is considered a failure.
  • the WiFi (pre) attach response message black or WiFi (pre) attach complete message may include the following parameters.
  • indicator indicating whether the PS mode has entered (or transitioned) if the PS mode entry through the pre-association is defined as a new WiFi PS mode that does not receive a beacon message every listening interval, May not be transmitted, and in this case, the indication of whether the device enters or transitions to the PS mode may mean entering a new WiFi PS mode.
  • the Multi-RAT terminal is a value set in actual WiFi, the value is "0" or
  • the IWE may know that the UE enters a new WiFi PS mode.
  • the IWE may know that the terminal enters the existing WiFi PS mode.
  • the ilti-RAT terminal does not monitor the periodic broadcast signal (eg, beacon signal) of the AP that has completed the association until the instructions of the salary network are instructed. And, the mi ti-RAT terminal may receive the paging through the cellular network whether data can be transmitted from the associated AP.
  • the periodic broadcast signal eg, beacon signal
  • the IWE Upon receiving the above WiFi (pre) attach response message or WiFi (pre) attach complete message from the Multi-RAT terminal, the IWE recognizes that the Multi-RAT terminal is attached to WiFi but enters a new WiFi PS mode. can do. The IWE may transmit a WiFi pre—attach complete ACK message to the Multi-RAT terminal. While the multi-RAT terminal is operating in the new WiFi PS mode, when the IWE receives data from the cellular network, the IWE may decide to transmit the data through the WiFi. The IWE may instruct the multi-RAT terminal to receive a WiFi beacon signal or transmit a message or indicator indicating that AID data has arrived.
  • the multi-channel RAT terminal may receive a beacon signal from the AP, switch to the Awake state with the AP, or operate in the awake state with the AP.
  • the multi-RAT terminal can inform the IWE that it is a WiFi awake state.
  • the Multi-RAT terminal does not monitor the beacon of the AP which has completed the association until the cell tells the network to receive an instruction to receive the WiFi beacon signal from the cell network.
  • the power saving effect of the Ui-RAT terminal is significantly improved.
  • the secondary system idle mode operation of the terminal is performed.
  • the proposed new WiFi is proposed.
  • Embodiments described above are those in which the components and features of the present invention are combined in a predetermined form. Each component or feature is to be considered optional unless stated otherwise. Each component or feature may be embodied in a form that is not combined with other components or features. It is also possible to combine some components and / or features to constitute an embodiment of the invention. The order of the operations described in the embodiments of the present invention may be changed. Some configurations or features of one embodiment may be included in another embodiment or may be substituted for any other configuration or feature of another embodiment ⁇ an embodiment is constructed by combining claims that are not expressly cited in the claims. It is obvious that the present invention may be incorporated into a new claim by a post-application correction.

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

Abstract

L'invention concerne un procédé pour effectuer une opération en mode ralenti avec un système de communication particulier par un terminal dans un réseau comprenant de multiples systèmes de communication en interaction les uns avec les autres, lequel comprend les étapes suivantes: transmettre, vers une entité interagissante d'un premier système de communication, un résultat de balayage d'une station de base d'un second système de communication dans un état où le terminal est connecté à une commande de ressource radio (RRC) avec le premier système de communication et est en mode de désenregistrement avec le second système de communication; transmettre un premier message de l'entité interagissant du premier système de communication vers le terminal, le premier message comprenant un premier indicateur ordonnant au terminal d'effectuer un processus d'association avec la station de base du second système de communication, et un second indicateur ordonnant au terminal de fonctionner dans un mode d'économie d'énergie avec le second système de communication; effectuer le processus d'association avec la station de base du second système de communication en fonction du premier indicateur du premier message; et passer en mode d'économie d'énergie depuis le mode de désenregistrement avec le second système de communication en fonction du second indicateur du premier message.
PCT/KR2014/003239 2013-04-15 2014-04-15 Procédé pour réaliser un fonctionnement en mode ralenti avec système de communication particulier dans un réseau comprenant de multiples systèmes de communication en interaction les uns avec les autres, et appareil s'y rapportant Ceased WO2014171699A1 (fr)

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KR20030094422A (ko) * 2001-05-15 2003-12-11 콸콤 인코포레이티드 그룹 통신 네트워크에 효율적인 휴면모드를 제공하기 위한통신장치
KR20100068455A (ko) * 2008-04-30 2010-06-23 후아웨이 테크놀러지 컴퍼니 리미티드 자원 처리 방법, 통신 시스템, 및 이동성 관리 요소
KR20110112267A (ko) * 2004-09-10 2011-10-12 인터디지탈 테크날러지 코포레이션 복수의 네트워크 유형 호환을 용이하게 하는 무선 통신 방법 및 컴포넌트들
KR20110131219A (ko) * 2009-03-06 2011-12-06 후아웨이 테크놀러지 컴퍼니 리미티드 다중 네트워크 인터페이스를 갖는 기기를 위한 전력 관리 시스템 및 방법

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030094422A (ko) * 2001-05-15 2003-12-11 콸콤 인코포레이티드 그룹 통신 네트워크에 효율적인 휴면모드를 제공하기 위한통신장치
KR20110112267A (ko) * 2004-09-10 2011-10-12 인터디지탈 테크날러지 코포레이션 복수의 네트워크 유형 호환을 용이하게 하는 무선 통신 방법 및 컴포넌트들
KR20100068455A (ko) * 2008-04-30 2010-06-23 후아웨이 테크놀러지 컴퍼니 리미티드 자원 처리 방법, 통신 시스템, 및 이동성 관리 요소
KR20110131219A (ko) * 2009-03-06 2011-12-06 후아웨이 테크놀러지 컴퍼니 리미티드 다중 네트워크 인터페이스를 갖는 기기를 위한 전력 관리 시스템 및 방법

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