KR20160102886A - Apparatus and method for adaptively changing the data path - Google Patents

Abstract

In accordance with aspects related to a wireless environment, a method for operating a user equipment connected to an evolved node B (eNB) includes the steps of: generating, when the eNB is not connected to a local gateway (L-GW), a first data path for a second data flow, in which an internet protocol (IP) address can be changed, using a first access point name (APN); and generating, when the eNB is connected to the L-GW, a second data path for the second data flow using a second APN corresponding to the first APN, wherein the first data path may be a path for a first data flow in which the IP address cannot be changed, the second data path may be a path through which the user equipment and a packet data network are connected to each other through the L-GW, and the L-GW may be a GW for communicating with the PDN without using the core network (CN).

Description

[0001] APPARATUS AND METHOD FOR ADAPTIVELY CHANGING THE DATA PATH [0002]

The following description relates to an apparatus and method for adaptively changing data paths.

There is a need for a method for transmitting or receiving data over a much shorter data path.

The following description can provide an apparatus and method for adaptively connecting to a packet data network (PDN), depending on the type of gateway (GW) available.

According to aspects related to a wireless environment, an operation method of a user equipment connected to an evolved node B (eNB) is a method in which the base station is connected to an L-GW (local gateway) Generating a first data path for a second data flow in which an IP (Internet Protocol) address can be changed using a first APN (access point name) Generating a second data path for the second data flow using a second APN corresponding to the first APN when the first data path is connected to the GW, And the second data path may be a path connecting the terminal and a packet data network (PDN) through the L-GW, and the L-GW may be a path for connecting the terminal to a packet data network (PDU) without using the core network (CN) GW can be for God.

According to aspects related to the radio environment, an apparatus of a terminal connected to a base station includes a controller and at least one transceiver operatively coupled with the control unit And the control unit controls the second data flow (flow) in which the IP (Internet Protocol) address can be changed using the first APN (access point name) when the base station is not connected to the L-GW ), And if the base station is connected to the L-GW, generate a second data path for the second data flow using a second APN corresponding to the first APN, The first data path may be a path for a first data flow in which an IP address can not be changed, and the second data path may be configured to generate a data path through the L- Packet data network (PDN) A may be a path connecting the L-GW may be, the core network (CN, core network) and the PDN GW to communicate without the use of.

For a more complete understanding, the following description is made with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.
1 is a diagram illustrating a network structure.
2 is a diagram illustrating a state of a terminal using pair APNs (Access Point Names).
3 is a diagram illustrating signal flow between a terminal connecting to a new base station and network elements.
4 is a diagram illustrating signal flow between a terminal 110 and network elements generating a new nomadic flow.
5 is a diagram illustrating signal flow between a terminal and network elements switching from a first data path to a second data path.
6 is a diagram illustrating an operation flow of a terminal connected to a new base station.
7 is a diagram illustrating an operation flow of a terminal that starts a new data flow.
8 is a diagram illustrating an operation flow of a terminal ending a data flow.
9 is a diagram illustrating a functional configuration of a terminal.
10 is a diagram illustrating the functional configuration of the control unit.

The terms used in this disclosure are used only to describe certain embodiments and may not be intended to limit the scope of other embodiments. The singular expressions may include plural expressions unless the context clearly dictates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the art. The general predefined terms used in this disclosure may be interpreted as having the same or similar meaning as the contextual meanings of the related art and, unless explicitly defined in the present disclosure, include ideally or in an excessively formal sense . In some cases, the terms defined in this disclosure can not be construed to exclude embodiments of the present disclosure.

In the various embodiments of the present disclosure described below, a hardware approach is illustrated by way of example. However, the various embodiments of the present disclosure do not exclude a software-based approach, since various embodiments of the present disclosure include techniques that use both hardware and software.

SIPTO (selected IP (internet protocol) traffic offload) of an architecture of a 3rd generation partnership project (3GPP) is a method of transmitting data between a PDN (packet data network) and an UE (user equipment) via an L-GW And applies a data path (hereinafter referred to as a data path through the L-GW). The L-GW may be located in an eNB (Evolved Node B) or adjacent to the base station (eNB). The L-GW makes it possible to connect the PDN with the UE without using a core network (CN).

In addition, the architecture of the 3GPP applies a data path between the PDN and the terminal via a packet data network gateway (P-GW) (hereinafter, data path via P-GW).

The data path through the L-GW can exchange traffic without using a core network (CN), so it can have a shorter data path than the data path through the P-GW. Also, the data path through the L-GW can reduce latency because it can exchange traffic without using the CN. Also, the data path through the LGW may have a small overhead because it can exchange traffic without the use of the CN.

In the current wireless environment, the data path over the P-GW may be used for mobile flow or nomadic flow. The mobile flow may be a data flow that does not authorize a change in the IP address. For example, the mobile flow may be voice over internet protocol (VoIP) calls, live video streaming, secure shell (SSH) access, and the like. The nomadic flow may be a data flow that authorizes a change in an internet protocol (IP) address. For example, the nomadic flow may be a data flow for web browsing, video download, domain name server (DNS), instant messengers (IM), and the like.

In the current wireless environment, on the other hand, the data path through the L-GW can only be used for nomadic flows. This is because the data path through the L-GW may be lost due to the mobility of the terminal.

For example, in the current wireless environment, it is assumed that the terminal is using a normative flow through the data path through the L-GW and has moved into the coverage of another base station. The other base station may be a base station not connected to the L-GW. In this case, since the nomadic flow of the current radio environment can not perform the assignment of a new IP address due to the loss of the L-GW, the nomadic flow in use by the terminal may be lost.

That is, even though the data path through the L-GW can provide more efficient service than the data path through the P-GW, the terminal in the current wireless environment is only able to communicate with the L- The data path can be used.

Thus, the following description proposes a structure of a new APN (access point name). A terminal using the new APN structure can maintain a normally-flow regardless of whether the L-GW is available.

1 is a diagram illustrating a network.

1, a network 100 includes a UE 110, an evolved Node B (eNB) 120, a core network (CN) 130, an L-GW (local gateway) An internet protocol (IP) service 180, and a peer 190.

The terminal 110 may be an apparatus for communicating with an entity (e.g., a peer 190). For example, the terminal 110 may perform wide area network (WAN) communication with the entity. In another example, the terminal 110 may perform proximity communication with the entity.

The terminal 110 may be a device having mobility. For example, the terminal 110 may be a mobile phone, a smart phone, a music player, a portable game console, a navigation system, a laptop computer, . The terminal 110 may be referred to as a mobile station, a terminal, or the like.

The terminal 110 may be located within the coverage of the base station 120. The terminal 110 can receive a wireless service from the base station 120.

The base station 120 may provide a wireless service to the terminal 110. For example, the BS 120 may provide control information so that the MS 110 may perform communication with the MS. For example, the base station 120 may relay the CN 130, the IP service 180, and the like so that the terminal 110 can communicate with the entity.

The base station 120 may be a fixed device. For example, the base station 120 may be referred to as a base station, an access point, or the like.

The CN 130 may assist in the communication of the terminal 110. For example, the CN 130 may perform authentication, charging, and end-to-end connection management for the terminal 110. In another example, to assist in the communication of the terminal 110, the CN 130 may cooperate with a variety of different wireless access technologies. The CN 130 may support communication of the terminal 110 by separating user data and control data (controlling data or signaling data).

The CN 130 may include a mobility management entity (MME) 140, a serving gateway (S-GW) 150, and a packet data network gateway (P-GW) Although not shown in FIG. 1, the CN 130 may include an HSS (home subscriber server) having subscriber information.

The MME 140 may be a node processing a control plane at the CN 130. For example, to assist in the communication of the terminal 110, the MME 140 may connect or release a bearer for the terminal 110. For example, the MME 140 may control the terminal 110 to transition from the idle state to the active state. In another example, the MME 140 may manage a security key for the terminal 110.

The S-GW 150 may be a node processing a user plane at the CN 130. For example, the S-GW 150 may support mobility of the UE. In another example, the S-GW 150 supports mobility between long term evolution (LTE) and global system for mobile communication (GSM), general packet radio service (GPRS), and high speed packet access . In another example, the S-GW 150 can collect billing and statistical information.

The P-GW 160 may be a node connecting to a packet-switched network such as the Internet at the CN 130. For example, the P-GW 160 may assign an IP address to the terminal 110.

The L-GW 170 can support communication between the terminal and the IP service 180 without using the CN 130. For example, the L-GW 170 may assign an IP address to the terminal 110.

The IP service 180 may be a node providing an IP-based multimedia service, a mobile Internet service, or the like. For example, the IP service 180 may be a packet data network (PDN).

The peer 190 may be an entity communicating with the terminal 110. In some embodiments, the peer 190 may be a terminal. For example, the peer 190 may be an entity for exchanging traffic with the terminal 110 through a call or the like.

The terminal 110 may exchange traffic with the IP service 180 (or the peer 190) through a data path 192. The data path 192 may be a data path between the IP service 180 and the terminal 110 via the CN 130 (or the P-GW 160). The data path 192 may be referred to as a first data path.

The terminal 110 may exchange traffic with the IP service 180 (or the peer 190) via the data path 194. The data path 194 may be a data path between the IP service 180 and the terminal 110 via the L-GW 170. The data path 194 may be referred to as a second data path.

The second data path may have a lower delay than the first data path. In addition, the second data path may have a smaller overhead than the first data path. On the other hand, the first data path may correspond to the mobility of the UE more than the second data path.

The terminal 110 using the new APN structure can flexibly switch the first data path and the second data path according to the state of the terminal 110 to transmit or receive traffic. The APN may be data (or string) for connection between the terminal 110 and the IP service 180. For example, for connection between the terminal 110 and the IP service 180, the APN may include a network identifier and an operator identifier. The terminal 110 may share the APN with the MME 140.

Table 1 below is an example showing the structure of the current APN for the Internet.

As shown in Table 1 above, the attributes of the structure of the current APN do not include an identifier for the type of data flow (e.g., normative flow or mobile flow). That is, the structure of the current APN does not include an identifier for tracking the loss of the nomadic flow due to the movement of the terminal. Therefore, the structure of the current APN has a structure that can restrictively use the second data path.

Table 2 below and Table 3 below are examples showing the structure (pair APNs) of a new APN for the Internet.

Table 2 shows a structure of a mobile APN for the Internet, and Table 3 shows a structure of a nomadic APN for the Internet. The mobile APN of Table 2 may correspond to the nomadic APN of Table 3. [ In other words, the mobile APN and the nomadic APN may be composed of one pair.

The mobile APN and the nomadic APNs (hereinafter referred to as " pair APNs ") may have a new APN value. For example, in Table 2 above, the mobile APN may have "mobile internet" as the APN value. Also, in the above Table 3, the nomadic APN may have a "nomadic internet" as an APN value. The new APN value may be a value for distinguishing between the pair APNs.

The pair APNs may include a new attribute "Mobility Type ". The new attribute "Mobility Type" can be supplementarily applied. In some embodiments, some of the pair APNs may not include "Mobility Type" as an attribute.

The mobile APN may be used for connection with the IP service 180 regardless of the type of data flow (e.g., normative flow or mobile flow). The mobile APN may be referred to as a first APN (or APN # 1).

The nomadic APN may be used for connection with the IP service 180 only if the type of data flow is a normative flow. The nomadic APN may be referred to as a second APN (or APN # 2).

The terminal 110 and the network elements (e.g., the P-GW 160, the L-GW 170, the IP service 180, etc.) may be aware of the existence of the pair APNs. For example, the information on the pair APNs may be stored in the terminal 110 during the manufacturing process of the terminal 110. For example, the information about the pair APNs may be stored in the terminal 110 through a message received at the terminal 110 through an entry procedure of the network.

The terminal 110 and the network elements can transmit or receive traffic through various data paths using the pair APNs. For example, if the terminal 110 loses the second data path while it is transmitting or receiving traffic through the second data path using the second APN, the terminal 110 uses the first APN And transmit or receive the traffic that was being transmitted or received via the first data path.

The UE 110 and the network elements may use the pair APNs according to a rule as shown in Table 4 below.

In addition, the terminal 110 and the network elements can process APN configuration information according to a rule as shown in Table 5 below.

According to the rules shown in Table 4 and Table 5, the terminal 110 and the network elements can dynamically switch data paths and exchange traffic using the new APN (or pair APNs) .

2 is a diagram illustrating a state of a terminal using pair APNs. The state of the terminal may be the state of the terminal 110 shown in FIG.

2, the UE 110 includes a notified 210, a connected PDN by using a APN # 2 220, a connected PDN by using a APN # 1 230, and the APN # 2 is connected to the APN # 1 and connected to the APN # 2.

The status 210 may indicate that the terminal 110 is not connected to any network. The status 210 may indicate that the terminal 110 is in an idle state.

The status 220 may indicate that the terminal 110 is connected to the PDN using the second APN. The state 220 may be a state in which the terminal 110 sets the non-MAC flow with the IP service 180 using the second APN. In other words, the state 220 may be a state in which the terminal 110 exchanges traffic with the IP service 180 using the second data path.

The state 230 may indicate that the terminal 110 is connected to the PDN using the first APN. The state 230 may be a state in which the terminal 110 sets a mobile flow with the IP service 180 using the first APN. The state 230 may be a state in which the terminal 110 sets up a non-mimic flow with the IP service 180 using the first APN. In other words, the state 230 may be a state in which the terminal 110 exchanges traffic with the IP service 180 using the first data path.

The status 240 may indicate that the terminal 110 is connected to the PDN using the first APN and connected to another PDN using the second APN. The state 240 may be a state in which the terminal 110 sets up a mobile flow with the IP service 180 using the first APN and sets a non-arbitrary flow with another IP service using the second APN. In other words, the status 240 may be a state in which the terminal 110 exchanges traffic with the IP service 180 using the first data path, and exchanges traffic with another IP service using the second data path .

A state transition 260 may indicate a state in which the terminal 110 performs a network entry through a base station connected to the P-GW and not connected to the L-GW.

The state change 261 may indicate a state in which the terminal 110 is connected to the P-GW and performs network entry through a base station connected to the L-GW.

The state change 262 may indicate a state of terminating the connection with the network or terminating the connection with the network when the terminal 110 enters the network.

The state change 263 may indicate a state in which the terminal 110 starts a new nomadic flow. The status change 263 may refer to a state in which the UE 110 accesses the same P-GW as the P-GW connected to the serving BS and another BS connected to the L-GW and the L-GW connected to the serving BS. The state change 263 may indicate a state in which the terminal 110 ends the normally-flow.

State change 264 may refer to a state in which the terminal 110 initiates a new mobile flow in a state where the mobile 110 is ongoing.

The state change 265 may indicate a state in which the terminal 110 starts a new mobile flow in a state in which the terminal 110 does not proceed with a normative flow. The state change 265 may refer to a state in which the terminal 110 is connected to the P-GW and is connected to another base station not connected to the L-GW.

The state change 266 may indicate a state in which the terminal 110 starts a new data flow. The status change 266 may refer to a state in which the UE 110 accesses the same P-GW as the P-GW connected to the serving BS and another BS connected to the L-GW and the L-GW connected to the serving BS.

The state change 267 may indicate a state in which the terminal 110 ends the last normative flow. The state change 267 may indicate a state in which the terminal 110 is connected to the P-GW and is connected to the base station not connected to the L-GW.

The state change 268 may indicate a state in which the terminal 110 ends the last mobile flow.

The state change 269 may indicate a state in which the terminal 110 starts a new mobile flow. The state change 269 may refer to a state in which the terminal 110 initiates a new nomadic flow within the coverage of a base station connected to the P-GW and not connected to the L-GW. The state change 269 may refer to a state where the terminal 110 in the coverage of the base station connected to the P-GW and not connected to the L-GW ends the data flow. The status change 269 may refer to a state in which the terminal 110 is connected to the P-GW and is connected to another base station not connected to the L-GW. The status change 269 may indicate a state in which the terminal 110, which is proceeding with a mobile flow and is not proceeding with a normative flow, connects to the P-GW and the L-GW, respectively.

The state change 270 may refer to a state in which the terminal 110 initiates a new nomadic flow within the coverage of a base station connected to the P-GW and the L-GW, respectively. The state change 270 may refer to a state in which the terminal 110, which is in progress of the nomadic flow and the mobile flow respectively, accesses the P-GW and the L-GW and the base stations respectively connected thereto.

The state change 271 may refer to a state in which the terminal 110 within the coverage of the base station connected to the P-GW and the L-GW respectively ends the last mobile flow. The state change 271 may refer to a state in which a terminal in the nomadic flow is connected to a base station connected to the P-GW and the L-GW, respectively. The status change 271 may indicate a state in which the UE 110, which is in the process of nomadic flow and is not proceeding with the mobile flow, is connected to the P-GW and the L-GW, respectively.

Through the various state changes described above, the terminal 110 can efficiently initiate, maintain, or terminate the nomadic and mobile flows regardless of the characteristics of the network elements serving the terminal 110.

3 is a diagram illustrating signal flow between a terminal connecting to a new base station and network elements. The signal flow may be generated by the terminal 110, the base station 120, the MME 140, and the P-GW 160 shown in FIG.

Referring to FIG. 3, in step S300, the UE 110 may determine to connect with a PDN (e.g., the IP service 180) using the second APN (APN # 2) for a normative flow. In some embodiments, the terminal 110 may be a terminal that is newly entering the network through the base station 120. In some other embodiments, the terminal 110 may be a terminal performing handover from the serving base station to the base station 120. The terminal 110 may assume that the BS 120 is connected to the L-GW 170 according to the second rule (1) of Table 4. [ The terminal 110, which may assume that the L-GW 170 is available, may determine to connect with the PDN using the second one of the pair APNs for the nomadic flow. In other words, the terminal 110 may determine to connect with the PDN through the second data path using the second APN.

In step S310, the terminal 110 may transmit a first message to the MME 140 to request connection with the PDN using the second APN. The MME 140 may receive the first message from the terminal 110. The MME 140 recognizes that the BS 120 is not connected to the L-GW 170. In other words, the MME 140 recognizes that the L-GW 170 is unavailable. Also, the MME 140 recognizes a first APN corresponding to the second APN among the pair APNs.

In step S320, the MME 140 may transmit a second message to the terminal 110 to inform the terminal 110 to use the first APN to connect to the PDN. The MME 140 may transmit the second message to the terminal 110 to inform the PDN that it will be connected to the PDN using the first APN according to the second rule (2) of Table 4 above. In other words, the MME 140 may transmit a second message to the terminal 110 by using the first APN to notify the MME 140 to connect with the PDN through the first data path. The terminal 110 may receive the second message from the MME 140.

In step S330, the UE 110 may connect to the PDN through the P-GW 160 based on the second message. The UE 110 can recognize that the BS 120 is a BS not connected to the L-GW through the second message. For the nomadic flow, the terminal 110 may connect to the PDN via the P-GW 160 using the first APN. In other words, for the nomadic flow, the terminal 110 may connect to the PDN via the first data path using the first APN.

Although the BS 120 is not connected to the L-GW 170, the MS 110 uses the first APN corresponding to the second APN to transmit the first data path without loss of the nomadic flow Can be generated. The terminal 110 may transmit or receive the traffic for the nomadic flow using the first data path through the procedure shown in FIG.

4 is a diagram illustrating signal flow between a terminal 110 and network elements generating a new nomadic flow. The signal flow may be generated by the terminal 110, the base station 120, the MME 140, the P-GW 160, and the peer 190 shown in FIG.

Referring to FIG. 4, in step S400, the MME 140 may transmit an indication to the terminal 110 to indicate that the L-GW 170 is unavailable. In some embodiments, the MME 140 may send the indication message to the terminal 110 via a network entry procedure. In some embodiments, the MME 140 includes information for notifying the terminal 110 that the L-GW 170 is unavailable in a handover command message of the handover procedure of the terminal 110, have. Information for notifying that the L-GW 170 is unavailable may be included in the handover command message in the form of "true / false ". For example, the handover command message may notify the terminal 110 that the L-GW 170 is unavailable through one bit (e.g., "1" or "0"). The terminal 110 may receive the indication message from the MME 140.

In step S410, the terminal 110 may connect to the PDN (for example, the IP service 180) through the P-GW 160 based on the indication message. The terminal 110 can recognize that the BS 120 connected to the MS 110 is a BS not connected to the L-GW 170 through the indication message. For network entry, the terminal 110 may connect to the PDN via the P-GW 160 using the first APN. In other words, for the network entry and the like, the terminal 110 can connect with the PDN through the first data path using the first APN.

In step S420, the terminal 110 may initiate a new data flow (a new normative flow).

In step S430, the terminal 110 may be aware that the base station 120 serving the terminal 110 is not connected to the L-GW 170 through the received indication message. Accordingly, the terminal 110 may be aware that, despite generating the nomadic flow, it must process the nomadic flow using the first APN rather than the second APN.

In step S440, the terminal 110 may utilize a traffic flow through the P-GW 160 for the disclosed no-mock flow. In other words, for the nomadic flow described above, the terminal 110 may transmit traffic to or receive traffic from the peer 190 via the first data path.

5 is a diagram illustrating signal flow between a terminal and network elements switching from a first data path to a second data path. The signal flow may be generated in the UE 110, the BS 120, the MME 140, the P-GW 160, the L-GW 170, and the peer 190 shown in FIG.

Referring to FIG. 5, in step S500, for the nomadic flow, the terminal 110 and the peer 190 may use the traffic flow through the P-GW 160. FIG. In other words, for the nomadic flow, the terminal 110 and the peer 190 may utilize the traffic flow through the first data path.

In step S510, the terminal 110 can move to a new base station. The new base station may be the base station 120. The base station 120 may be a base station connected to the L-GW 170. In other words, the terminal 110 can move to the base station that can use the L-GW 170.

In step S520, the terminal 110 may transmit a first message to the MME 140 requesting to generate the second data path using the second APN for the nomadic flow in step S500 have. The terminal 110 may assume that the L-GW 170 is available according to the second rule (4) of Table 4. [ In other words, the terminal 110 may assume that the BS 120 is connected to the L-GW 170 according to the second rule (4) of Table 4. [ The terminal 110 may transmit the first message to the MME according to the above assumption. Because the second rule (4) in Table 4 above may be optional, in some embodiments, the terminal 110 may generate the first data path using the first APN corresponding to the second APN And may transmit the first message to the MME 140 to request. The MME 140 may receive the first message from the terminal 110.

In step S530, the MME 140 may transmit a second message to the terminal 110 to inform (or instruct) the connection with the PDN using the second APN. If the terminal 110 transmits the first message to the MME 140 according to the second rule (4) of Table 4 (i.e., the terminal 110 generates the second data path using the second APN) , The second message may be a message acknowledging the first message. Alternatively, when the UE 110 transmits the first message to the MME 140 unlike the second rule (4) of Table 4 (i.e., the UE 110 transmits the first data Path), the second message may be a message instructing to generate the second data path using the second APN, unlike the request via the first message. The terminal 110 may receive the second message from the MME 140.

In step S540, the terminal 110 may connect to the PDN (e.g., the IP service 180) through the L-GW 170 based on the second message. In other words, the terminal 110 may generate the second data path between the PDN and the terminal 110 based on the second message.

In step S550, the terminal 110 may perform an operation to terminate the connection with the PDN through the P-GW 160 with the MME 140. [ In other words, the terminal 110 may perform an operation with the MME 140 to terminate the first data path associated with the traffic flow at step S500.

In step S560, the terminal 110 can release the connection with the PDN through the P-GW 160 based on the operation in step S550. In other words, the terminal 110 may terminate the first data path between the terminal 110 and the PDN based on the operation in step S550.

In step S570, the terminal 110 may delete information related to the IP address of the first APN stored in the terminal 110. [ Since the second data path has been created in step S540 and the first data path has been terminated in step S560, the terminal 110 may delete information related to the IP address of the first APN stored in the terminal 110 .

In step S580, the terminal 110 may move from the IP address of the first APN to the IP address of the second APN corresponding to the first APN. In other words, the terminal 110 may determine an IP address for the second APN corresponding to the first APN.

In step S590, the terminal 110 may generate a traffic flow with the peer 190 based on the determined IP address of the second APN. The terminal 110 may transmit traffic for the non-modal flow to the peer 190 via the L-GW 170 using the second APN, or may receive traffic for the non-modal flow from the peer 190.

As described above, when the L-GW 170 is changed from a state in which the L-GW 170 is not available to the state in which the L-GW 170 is available, the terminal 110 recognizes the state change and can adaptively switch the data path . The terminal 110 may switch from the first data path to the second data path for more efficient transmission or reception of traffic.

6 is a diagram illustrating an operation flow of a terminal connected to a new base station. The operation flow may be performed by the terminal 110 shown in FIG.

Referring to FIG. 6, in step S600, the terminal 110 may connect to a new base station (or connect to a new base station). For example, the terminal 110 may be a terminal connected to the new base station through a handover procedure or the like. The new base station may be the base station 120 shown in FIG.

In step S610, the terminal 110 may determine whether there is an ongoing data flow (e.g., mobile flow). If there is no mobile flow presently in progress and there is a current non-modal flow, the terminal 110 may perform the operation of step S640. If there is a mobile flow currently in progress, the terminal 110 may perform the operation of step S615. 6, if there is no currently ongoing normative flow, the terminal 110 may terminate the operation flow illustrated in FIG.

In step S615, the terminal 110 can maintain the connection between the terminal 110 and the PDN via the P-GW 160 using the first APN (APN # 1). In other words, the terminal 110 can maintain the first data path using the first APN. The terminal 110 may transmit traffic to or receive traffic from the PDN using the first data path.

In step S620, the terminal 110 may determine whether there is a newly initiating data flow (e.g., a normative flow). In the absence of a newly initiating normative flow, the terminal 110 may terminate the operational flow shown in FIG. In the case where there is a normally initiating normative flow, the terminal 110 may perform the operation of step S625.

In step S625, the terminal 110 may determine whether the L-GW 170 is available. The terminal 110 can recognize whether the L-GW 170 is available through a message received from the MME. For example, when the terminal 110 is connected to the BS 120 through handover, the terminal 110 may receive a handover command message from the MME 140. The handover command message may include information on whether the L-GW 170 is available (or whether the base station 120 is connected to the L-GW 170). If the L-GW 170 is available, the terminal 110 may perform the operation in step S635. If the L-GW 170 is unavailable, the terminal 110 may perform the operation in step S630.

In step S630, the UE 110 may establish a connection with the PDN using the first APN (APN # 1) for the starting nonmodical flow. Because the L-GW 170 is unavailable, the terminal 110 may connect to the PDN using the first APN rather than the second APN for the nomadic flow. In other words, for the nomadic flow, the terminal 110 may generate the first data path using the first APN. The first APN may be an APN corresponding to the second APN used by the base station to which the terminal 110 previously connected with the base station 120. [

In step S635, the terminal 110 may connect to the PDN using the second APN (APN # 2) for the nomadic flow. In other words, for the nomadic flow, the terminal 110 may generate the second data path using the second APN.

In step S640, the terminal 110 may determine whether the L-GW 170 is available. As described in step S625, the terminal 110 may recognize whether the L-GW 170 is available or not. If the L-GW 170 is available, the terminal 110 can perform the operation in operation S650. If the L-GW 170 is unavailable, the terminal 110 can perform the operation in step S645.

In step S645, the terminal 110 may maintain the connection with the PDN using the first APN (APN # 1) for the ongoing NMD. Because the L-GW 170 is unavailable, the terminal 110 may maintain the connection with the PDN using the first APN rather than the second APN for the nomadic flow.

In step S650, the terminal 110 may determine whether the first data path for the ongoing nomadic flow already exists. If there is the first data path for the ongoing normative flow, the terminal 110 may perform the operation in step S655. If there is no first data path for the ongoing normative flow, the terminal 110 may perform the operation in step S660.

In step S655, the terminal 110 may terminate the connection with the PDN using the first APN. Since the L-GW 170 is available, the terminal 110 may terminate the connection with the PDN using the first APN according to the second rule (3) of Table 4. [

In step S660, the terminal 110 may connect to the PDN using the second APN. If the terminal 110 determines in step S650 that the first data path does not exist, the terminal 110 may connect to the PDN using the second APN for the ongoing NM procedure. If it is determined in step S650 that the first data path exists, the terminal 110 ends the connection with the PDN using the first APN in step S655, And may be connected to the PDN using the second APN for the mathematic flow. In other words, the terminal 110 may generate the second data path using the second APN for the onomathematic flow in progress.

7 is a diagram illustrating an operation flow of a terminal that starts a new data flow. The operation flow may be performed by the terminal 110 shown in FIG.

Referring to FIG. 7, in step S700, the terminal 110 may determine whether there is a new nomadic flow. If there is a new nomadic flow, the terminal 110 may perform the operation in step S705. If there is no new nomadic flow and there is a new mobile flow, the terminal 110 may perform the operation at step S730. 7, if there is no new nomadic flow and no new mobile flow, the terminal 110 may terminate the operation flow illustrated in FIG.

In step S705, the UE 110 may determine whether the UE 110 is already connected to the PDN using the second APN (APN # 2). If it is already connected to the PDN using the second APN, the terminal 110 may terminate the operation flow illustrated in FIG. Alternatively, if the PDN is not connected to the PDN using the second APN, the terminal 110 may perform the operation of step S710.

In step S710, the terminal 110 can determine whether the L-GW 170 is available. The terminal 110 may determine whether the L-GW 170 is available through a message received from the MME 140 or the like. If the L-GW 170 is unavailable, the terminal 110 may perform the operation of step S712. If the L-GW 170 is available, the terminal 110 may perform the operation in step S715.

In step S712, the terminal 110 may connect to the PDN through the P-GW 160 using the first APN. Because the L-GW 170 is unavailable, the terminal 110 may connect to the PDN via the P-GW 160 using the first APN despite initiating the nomadic flow. In other words, the terminal 110 may use the first APN to generate a first data path for the disclosed normative flow.

In step S715, the terminal 110 may connect to the PDN through the L-GW 170 using the second APN. In other words, the terminal 110 may use the second APN to generate a second data path for the disclosed normative flow.

In step S720, the terminal 110 may determine whether there is a pending mobile flow (i.e., not newly launched). If there is a pending mobile flow, the terminal 110 may maintain a connection to the pending mobile flow. Otherwise, if there is no pending mobile flow, the terminal 110 can perform the operation in step S725.

In step S725, the terminal 110 may terminate the connection with the PDN using the first APN. Since the connection with the PDN using the first APN is not currently used by the UE 110, the UE 110 terminates the connection with the PDN using the first APN according to the third rule of Table 4 can do. In other words, the terminal 110 may terminate the first data path generated using the first APN.

In step S730, the UE 110 may determine whether there is a connection with the PDN using the pending first APN. If there is a connection with the PDN using the first APN, the terminal 110 may terminate the operation flow illustrated in FIG. Alternatively, if there is no connection with the PDN using the first APN, the terminal 110 may perform the operation in step S735.

In step S735, the UE 110 may establish a connection with the PDN through the P-GW 160 using the first APN for the initiated mobile flow. In other words, the terminal 110 may generate the first data path using the first APN for the initiated mobile flow.

In step S740, the terminal 110 may determine whether there is a nomadic flow that is pending (i.e., not newly launched). In the absence of a pending normative flow, the terminal 110 may terminate the operational flow illustrated in FIG. Alternatively, if there is pneumatic flow pending, the terminal 110 may perform the operation in step S745.

In step S745, the terminal 110 may terminate the connection with the PDN using the second APN. The UE 110 may terminate the connection with the PDN using the second APN according to the third rule of Table 4. [ In other words, the terminal 110 may terminate the second data path not used.

8 is a diagram illustrating an operation flow of a terminal ending a data flow. The operation flow may be performed by the terminal 110 shown in FIG.

Referring to FIG. 8, in step S800, the terminal 110 may determine whether to terminate the mobile flow. When terminating the mobile flow, the terminal 110 may perform the operation of step S805. Alternatively, if the mobile flow is not terminated and the nomadic flow is terminated, the terminal 110 may perform the operation of step S830. 8, if no data flow ends, the terminal 110 may terminate the operation flow illustrated in FIG.

In step S805, the terminal 110 may determine whether the terminating mobile flow is the last of the pending mobile flows. If there is a mobile flow other than the terminating mobile flow (i.e., not the last mobile flow), the terminal 110 may terminate the operation flow illustrated in FIG. Alternatively, if the terminating mobile flow is the last mobile flow, the terminal 110 may perform the operation of step S810.

In step S810, the terminal 110 may determine whether there is a connection with the PDN using the second pending APN. In other words, the terminal 110 can determine whether there is a second data path. If there is no second data path, the terminal 110 may perform the operation in step S815. Alternatively, if there is the second data path, the terminal 110 may perform the operation in step S825.

In step S815, the terminal 110 may determine whether the L-GW 170 is available. If the L-GW 170 is unavailable, the terminal 110 may terminate the operation flow illustrated in FIG. 8 without terminating the first data path according to the fifth rule of Table 4 above. Alternatively, if the L-GW 170 is available, the terminal 110 may perform the operation of step S820.

In step S820, the terminal 110 may generate a second data path using the second APN. The UE 110 may generate the second data path using the second APN according to the fourth rule of Table 4. [

In step S825, the terminal 110 may terminate the first data path (connection using the first APN). The terminal 110 can terminate the first data path because the terminal 110 is connected to the PDN through the second data path.

In step 830, the terminal 110 may determine whether the terminating normative flow is the last nonmodic flow among the pending normative flows. If the terminating nomodic flow is not the last nomadic flow, the terminal 110 may terminate the operational flow illustrated in FIG. Alternatively, if the terminating nonmodic flow is the last nomadic flow, the terminal 110 may perform the operation in step S835.

In step S835, the terminal 110 may determine whether there is a pending first data path. The terminal 110 may determine whether the first data path is pending to maintain the connection with the PDN. If the first data path is pending, the terminal 110 may perform the operation of step S840. Alternatively, if the first data path is not pending, the terminal 110 may terminate the operation flow illustrated in FIG. 8 without terminating the second data path to maintain the connection with the PDN have.

In step S840, the terminal 110 may terminate the second data path. The terminal 110 may terminate the second data path because the PDN is connected to the PDN through the first data path.

As described above, the terminal 110 can maintain the connection with the network while assuring the mobility of the terminal with respect to the nomadic flow using the pair APNs. The terminal 110 can adaptively secure a communication capability using a data path.

As described above, when the BS is not connected to an L-GW (local gateway), an operation method of a terminal connected to a base station in a wireless environment is performed by using an access point name (APN) Generating a first data path for a second data flow in which the first APN corresponding to the first APN is connected to the L-GW; And generating a second data path for a second data flow, wherein the first data path may be a path for a first data flow in which an IP address can not be changed, and the second data path And a path for connecting between the terminal and a packet data network (PDN) through the L-GW. The L-GW may be a path for connecting the terminal with a packet data network (GW) for communicating with the PDN without using the core network Lt; / RTI > The first data path may be a path that is connected to the BS and connects the terminal and the PDN through a packet data network gateway (P-GW) included in the CN. The method may further include generating the first data path for the first data flow if the first data path is not created. The operation method may further include terminating the first data path when the first data path is not used. The method may further include, when the second data path is not used, terminating the second data path. The method may further include terminating the first data path when the first data path is not used and the second data path is not used.

The method may further include receiving a message from the mobility management entity (MME) to inform whether the L-GW is connected to the base station, Generating the data path may include generating the first data path for the second data flow when the base station is not connected to the L-GW based on the received message, Generating the second data path for the second data flow comprises generating the second data path for the second data flow when the base station is connected to the L-GW based on the received message . ≪ / RTI >

The method also includes transmitting or receiving at least one traffic associated with the second data flow over the first data path in response to the generation of the first data path, And transmitting or receiving the at least one traffic through the second data path corresponding to the generation of the path.

The method further comprises switching the first data path to the second data path when the terminal using the first data path for the second data flow is connected to another base station connected to the L-GW And transmitting or receiving at least one traffic related to the second data flow through the switched second data path.

In addition, the first APN may include information for the first data path, and the second APN may include information for the second data path.

9 is a diagram illustrating a functional configuration of a terminal. The functional configuration may be included in the terminal 110 shown in FIG.

9, the terminal 110 may include an antenna 910, at least one transceiver 920, a storage unit 930, and a controller 940.

The antenna 910 may include one or more antennas. The antenna 910 may be adapted to a multi-input multi-output (MIMO) scheme.

The at least one transceiver 920 may perform functions to transmit or receive signals over a wireless channel.

The at least one transceiver 920 may perform a function of converting a baseband signal and a bit string according to a physical layer specification of the system. For example, when transmitting data, the at least one transceiver 920 may generate complex symbols by encoding and modulating the transmitted bit stream. In another example, when receiving data, the at least one transceiver 920 may demodulate and decode the baseband signal to recover the received bit stream.

The at least one transceiver 920 may upconvert the baseband signal to an RF band signal and transmit it through the antenna 910. The at least one transceiver 920 may downconvert the RF band signal received through the antenna 910 to a baseband signal. For example, the at least one transceiver 920 may include a transmit filter, a receive filter, an amplifier, a mixer, an oscillator, a digital analog converter (DAC), an analog .

The at least one transceiver 920 may be operatively coupled to the controller 940.

The storage unit 930 may store control command codes, control data, or user data for controlling the terminal 110. For example, the storage unit 930 may include an application, an operating system (OS), a middleware, and a device driver.

The storage unit 930 may include at least one of a volatile memory and a non-volatile memory. The volatile memory includes a dynamic RAM (SRAM), a synchronous DRAM (SDRAM), a phase-change RAM (PRAM), a magnetic RAM (MRAM), a resistive RAM (RRAM) can do. The nonvolatile memory may include a read only memory (ROM), a programmable ROM (PROM), an electrically programmable ROM (EPROM), an electrically erasable ROM (EEPROM), a flash memory, and the like.

The storage unit 930 may include a nonvolatile medium such as a hard disk drive (HDD), a solid state disk (SSD), an embedded multi media card (eMMC), and a universal flash storage have.

The storage unit 930 may include information related to the pair APNs and an algorithm for operation related to the pair APNs. For example, the storage unit 930 may include information on whether the L-GW 170 is available. As another example, the storage unit 930 may include information for accessing the base station. As another example, the storage unit 930 may include information for changing the connection with the base station.

The storage unit 930 may be operatively coupled to the controller 940.

The controller 940 can control overall operations of the terminal 110. For example, the controller 940 may transmit or receive a signal through the at least one transceiver 920. The control unit 940 can write data to the storage unit 930 and read the data stored in the storage unit 930. For this, the controller 930 may include at least one processor. For example, the controller 940 may include a communication processor (CP) for performing communication control and an application processor (AP) for controlling an upper layer such as an application program.

The controller 940 can manage the connection, manage the data flow, and manage the IP configuration.

10 is a diagram illustrating the functional configuration of the control unit. The functional configuration may be included in the controller 940 shown in FIG.

10, the controller 940 may include a connection manage unit 1010, a flow manage unit 1020, and an IP configuration manage unit 1030.

The connection management unit 1010 may perform connection and release procedures using the pair APNs. The connection management unit 1010 may generate the first data path or the second data path by reading the pair APNs from the storage unit 930 or the like.

The connection manager 1010 may determine whether the L-GW 170 is available. The connection management unit 1010 may determine whether the BS is connected to the L-GW 170 when the BS to which the MS 110 is connected is changed. For example, the connection management unit 1010 may determine whether the L-GW 170 is available through an instruction message received from the MME 140.

The flow manager 1020 may set a new data flow or terminate the current data flow.

The flow manager 1020 may determine whether a data flow in which an event occurs (e.g., a starting data flow, a data flow changing data path, a terminating data flow, etc.) is a mobile flow or a nomadic flow.

The IP configuration management unit 1030 can configure and release an IP address. In addition, the IP configuration management unit 1030 can set attributes of the IP address.

The IP configuration management unit 1030 can delete the unused data paths or the IP addresses related to the unused data flows. The IP configuration management unit 1030 can search for a corresponding APN using the pair APNs. The IP configuration management unit may configure or configure an IP address associated with the corresponding APN.

As described above, an apparatus of a terminal connected to a base station in a wireless environment may include a controller and at least one transceiver operatively coupled with the controller. Wherein the controller is configured to transmit a second data flow that can change an IP (Internet Protocol) address using a first APN (access point name) when the base station is not connected to an L-GW (local gateway) And for generating a second data path for the second data flow using the second APN corresponding to the first APN when the base station is connected to the L-GW, Wherein the first data path may be a path for a first data flow in which an IP address can not be changed and the second data path may be a path for transmitting the data through the L- (packet data network) May be gyeolhaneun path, the L-GW may be, the core network (CN, core network) and the PDN GW to communicate without the use of. The first data path may be a path that is connected to the BS and connects the terminal and the PDN through a packet data network gateway (P-GW) included in the CN. The control unit may be further configured to generate the first data path in response to the start of the first data flow if the first data path is not created. The control unit may further be configured to terminate the first data path when the first data path is not used. The control unit may further be configured to terminate the second data path when the second data path is not used. The control unit may be further configured to terminate the first data path if the first data path is not used and the second data path is not used.

The control unit may further be configured to receive a message from the mobility management entity (MME) to inform whether the L-GW is connected to the base station, and the base station transmits the L- GW, the first data path may be configured to generate the first data path for the second data flow, and if the base station is connected to the L-GW based on the received message, And to generate the second data path for the second data path.

The control unit may further be configured to transmit or receive at least one traffic associated with the second data flow via the first data path in response to the generation of the first data path, And to transmit or receive the at least one traffic over the second data path in response to the generation of the second data path.

In addition, when the terminal using the first data path for the second data flow is connected to another base station connected to the L-GW, the control unit switches the first data path to the second data path And may be further configured to transmit or receive at least one traffic associated with the second data flow over the switched second data path.

In addition, the first APN may include information for the first data path, and the second APN may include information for the second data path.

Methods according to the claims of the present disclosure or the embodiments described in the specification may be implemented in hardware, software, or a combination of hardware and software.

When implemented in software, a computer-readable storage medium storing one or more programs (software modules) may be provided. One or more programs stored on a computer-readable storage medium are configured for execution by one or more processors in an electronic device. The one or more programs include instructions that cause the electronic device to perform the methods in accordance with the embodiments of the present disclosure or the claims of the present disclosure.

Such programs (software modules, software) may be stored in a computer readable medium such as a random access memory, a non-volatile memory including a flash memory, a ROM (Read Only Memory), an electrically erasable programmable ROM (EEPROM), a magnetic disc storage device, a compact disc-ROM (CD-ROM), a digital versatile disc (DVDs) An optical storage device, or a magnetic cassette. Or a combination of some or all of these. In addition, a plurality of constituent memories may be included.

In addition, the program may be transmitted through a communication network composed of a communication network such as the Internet, an Intranet, a LAN (Local Area Network), a WLAN (Wide LAN), or a SAN (Storage Area Network) And can be stored in an attachable storage device that can be accessed. Such a storage device may be connected to an apparatus performing an embodiment of the present disclosure via an external port. Further, a separate storage device on the communication network may be connected to an apparatus performing the embodiments of the present disclosure.

In the specific embodiments of the present disclosure described above, the elements included in the disclosure have been expressed singular or plural, in accordance with the specific embodiments shown. It should be understood, however, that the singular or plural representations are selected appropriately according to the situations presented for the convenience of description, and the present disclosure is not limited to the singular or plural constituent elements, And may be composed of a plurality of elements even if they are expressed.

While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. Therefore, the scope of the present disclosure should not be limited to the embodiments described, but should be determined by the scope of the appended claims, as well as the appended claims.

Claims (20)

1. A method of operating a user equipment connected to an evolved node B (eNB) in a wireless environment,
The method comprising the steps of: if the base station is not connected to an L-GW (local gateway), transmitting a first data path for a second data flow capable of changing an IP (Internet Protocol) address using a first APN (access point name) generating a path,
Generating a second data path for the second data flow using a second APN corresponding to the first APN when the base station is connected to the L-GW,
The first data path comprising:
A path for a first data flow in which an IP address can not be changed,
Wherein the second data path comprises:
A packet data network (PDN) through the L-GW,
The L-
(GW) for communicating with the PDN without using a core network (CN).
2. The method of claim 1,
Wherein the path is a connection between the UE and the PDN via a packet data network gateway (P-GW) included in the CN.
3. The method of claim 2, further comprising generating the first data path for the first data flow if the first data path is not created.
The method of claim 3,
And terminating the first data path if the first data path is not utilized.
The method of claim 3,
And terminating the second data path if the second data path is not utilized.
The method of claim 3,
And terminating the first data path when the second data path is not used without using the first data path.
The method according to claim 1,
Further comprising the step of receiving, from a mobility management entity (MME), a message informing whether the L-GW is connected to the base station,
Wherein the generating the first data path for the second data flow comprises:
And generating the first data path for the second data flow when the base station is not connected to the L-GW based on the received message,
Wherein the step of generating the second data path for the second data flow comprises:
And generating the second data path for the second data flow when the base station is connected to the L-GW based on the received message.
The method according to claim 1,
Transmitting or receiving at least one traffic associated with the second data flow through the first data path in response to the generation of the first data path;
And transmitting or receiving the at least one traffic through the second data path in response to the generation of the second data path.
The method according to claim 1,
Switching the first data path to the second data path when the terminal using the first data path for the second data flow is connected to another base station connected to the L-GW;
And transmitting or receiving at least one traffic associated with the second data flow over the switched second data path.
The method of claim 1,
The information for the first data path,
The second APN comprises:
The information for the second data path.
1. An apparatus of a user equipment connected to an evolved node B (eNB) in a wireless environment,
A controller,
And at least one transceiver operatively coupled to the control unit,
Wherein,
The method comprising the steps of: if the base station is not connected to an L-GW (local gateway), transmitting a first data path for a second data flow capable of changing an IP (Internet Protocol) address using a first APN (access point name) and to generate a path,
And to generate a second data path for the second data flow using a second APN corresponding to the first APN when the base station is connected to the L-GW,
The first data path comprising:
A path for a first data flow in which an IP address can not be changed,
Wherein the second data path comprises:
A packet data network (PDN) through the L-GW,
The L-
Wherein the GW is for communicating with the PDN without using a core network (CN).
12. The method of claim 11,
Wherein the path is a path that is connected to the base station and connects the terminal and the PDN through a packet data network gateway (P-GW) included in the CN.
13. The apparatus of claim 12,
And generate the first data path in response to the beginning of the first data flow if the first data path is not created.
14. The apparatus of claim 13,
And to terminate the first data path if the first data path is not utilized.
14. The apparatus of claim 13,
And to terminate the second data path if the second data path is not utilized.
14. The apparatus of claim 13,
And to terminate the first data path if the first data path is not utilized and the second data path is not utilized.
12. The apparatus of claim 11,
And to receive a message from a mobility management entity (MME) to inform whether the L-GW is connected to the base station,
And to generate the first data path for the second data flow if the base station is not associated with the L-GW based on the received message,
And to generate the second data path for the second data flow if the base station is connected to the L-GW based on the received message.
12. The apparatus of claim 11,
And to transmit or receive at least one traffic associated with the second data flow over the first data path in response to the generation of the first data path,
And transmit or receive the at least one traffic over the second data path in response to the generation of the second data path.
12. The apparatus of claim 11,
And to switch the first data path to the second data path when the terminal using the first data path for the second data flow is connected to another base station connected to the L-GW,
And transmit or receive at least one traffic associated with the second data flow over the switched second data path.
12. The system of claim 11,
The information for the first data path,
The second APN comprises:
And information for the second data path.

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