JP2018191147A - Control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure communication quality per packet in a more appropriate manner.SOLUTION: A control method for ensuring communication quality performed by an eNB (evolved Node B) 1 or an SGW (Serving Gateway) 2 that relays a user packet on an EPS (Evolved Packet System) bearer in mobile communication comprises a relaying step that includes determining QoS parameters pertaining to QoS (Quality of Service) on the basis of a parameter included in a received user packet to relay the user packet adding the QoS parameters thereto. The relaying step may involve determining the QoS parameters on the basis of a plurality of parameters included in the received user packet. The relaying step may also involve determining the QoS parameters further on the basis of association information where parameters are associated with the respective QoS parameters.SELECTED DRAWING: Figure 11

Description

  The present invention relates to a control method for guaranteeing communication quality, which is executed by a node that relays a packet in mobile communication.

  Non-Patent Document 1 below discloses QoS (Quality of Service) control in mobile communication.

3GPP TS 23.203 V14.3.0 (2017-03)

  In the QoS control in the conventional mobile communication, when a packet is relayed by a relay node in a specific communication path, a common QoS parameter may be added to all the packets. Thus, there is a problem that the communication quality for each packet cannot be guaranteed by adding a common QoS parameter.

  Accordingly, an object of the present invention is to provide a control method that can more appropriately guarantee the communication quality for each packet in order to solve the above-described problems.

  In order to solve the above-described problem, a control method according to an aspect of the present invention is a control method for guaranteeing communication quality, which is executed by a node that relays a packet in mobile communication, and the received packet And a relay step of determining a QoS parameter related to QoS (Quality of Service) based on the parameter included in the packet and adding the QoS parameter to the packet and relaying the packet.

  According to such a control method, the QoS parameter determined based on the parameter included in the received packet is added to the packet and relayed. Thereby, for example, since an appropriate QoS parameter can be added and relayed for each packet, the communication quality for each packet can be more appropriately ensured.

  According to the present invention, communication quality for each packet can be more appropriately ensured.

It is a conceptual diagram of the packet communication in the conventional LTE architecture. It is a table figure which shows the QCI parameter of 3GPP specification. It is a table figure which shows the protocol stack | stuck of the packet between eNB and SGW. It is a sequence diagram which shows the process of the conventional GTP encapsulation. It is a figure which shows the system configuration | structure of the communication system which concerns on embodiment of this invention. It is a figure which shows the functional block diagram of eNB1. It is a figure explaining the hardware constitutions of eNB1. It is a figure which shows the example of a table of correspondence information. It is a figure which shows the functional block diagram of SGW2. It is a figure explaining the hardware constitutions of SGW2. It is a sequence diagram which shows the process of GTP encapsulation by the communication system which concerns on embodiment of this invention.

  Hereinafter, embodiments of a communication terminal will be described in detail with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. The embodiments in the following description are specific examples of the present invention, and are not limited to these embodiments unless specifically described to limit the present invention.

  First, the prior art will be described. FIG. 1 is a conceptual diagram of packet communication in a conventional LTE (Long Term Evolution) architecture. As shown in FIG. 1, in LTE, as nodes, UE (User Equipment), eNB (evolved Node B), SGW (Serving Gateway), PGW (PDN (Packet Data Network) Gateway), MME (Mobility Management Entity) and server Is included. These nodes are general nodes in a mobile communication network such as LTE and will not be described in detail but will be described briefly below.

  The UE is a computer terminal such as a smartphone or an electronic device that performs mobile communication. eNB is a so-called base station. The SGW serves as a base point for the eNB or the like, and is a gateway device that performs relay processing of user packets (user data packets, U-Plane packets) with the PGW. The PGW is a gateway device that functions as a gateway between a PDN (an external network that is an access destination) and a core network. The MME is a server device that performs movement control in mobile communication. The server is a server device included in an access destination PDN or the like. In addition, between eNB-SGW-PGW (connection path | route from eNB to a core network) is called a mobile backhaul.

  The UE and eNB can be connected to each other wirelessly. The eNB and the SGW, the eNB and the MME, the SGW and the MME, the SGW and the PGW, and the PGW and the server can be connected to each other by wire (partially wireless).

  In LTE, an EPS (Evolved Packet System) bearer is established in order for the UE to communicate with an external PDN. The bearer (GTP (GPRS (General Packet Radio Service) Tunneling Protocol) tunnel) is a logical packet communication path that ensures communication performance (delay, bandwidth, etc.). As shown in FIG. 1, the EPS bearer includes a radio bearer between the UE and the eNB, an S1 bearer between the eNB and the SGW, and an S5 / S8 bearer between the SGW and the PGW. After the EPS bearer is established, the UE exchanges user packets using a common QoS (Quality of Service) parameter. Note that only a single common QoS parameter can be specified for one EPS bearer.

  The QoS parameters in the EPS bearer are QCI (QoS Class Identifier), ARP (Allocation and Retention Priority), APN-AMBR (Aggregated Maximum Bitrate), and UE-AMBR. QCI is a value used as a reference value for packet transfer quality (packet loss rate, packet delay amount). FIG. 2 is a table showing QCI parameters defined by 3GPP (Third Generation Partnership Project). ARP is a value indicating the priority of a bearer (for example, identification of an emergency call and a priority call in LTE). APN-AMBR is the maximum value of the total transmission rate of all non-GBR (Guaranteed Bitrate) bearers between UE and PGW. UE-AMBR is the maximum value of the total transmission rate of all non-GBR bearers in the UE. Note that there are two types of EPS bearers: a GBR bearer whose transfer rate is guaranteed and a non-GBR bearer whose transfer rate is not guaranteed. In the case of a GBR bearer, GBR and MBR (Maximum Bitrate) are also set as QoS parameters. GBR is a transmission rate guaranteed by the GBR bearer (set for each of UL (Uplink, Uplink) / DL (Downlink, Downlink)). MBR is the maximum transmission rate that can be output by the GBR bearer (set for each UL / DL).

  Here, as described above, since the user packet exchanged between the UE and the server uses a common QoS parameter, quality assurance may not be possible when different applications are passed. That is, the user packet is transferred with the designated QoS, but a differentiated QoS guarantee cannot be established for each application. For example, in voice communication based on packet communication such as VoLTE (Voice over LTE), a high priority EPS bearer (EPS bearer 2) is separately established, but user data is initially established EPS bearer (EPS bearer 1). Can not be applied to use. Even if it is possible with the EPS bearer distribution technology, QoS can only be guaranteed with a coarse granularity (EPS bearer 1 or EPS bearer 2).

  In the S1 bearer section, user packets are encapsulated by GTP. FIG. 3 is a table diagram illustrating a protocol stack of a packet between the eNB and the SGW that are S1 bearer sections. The user packet including the Inner parameter shown in FIG. 3 is added with the Outer parameter shown in FIG. 3 in the S1 bearer section. However, since the DSCP (Differential Services Code Point) value of Outer (indicating QoS) is calculated from the correspondence table with the QCI, the priority of the original user packet (ie, application) is ignored. For example, when a user packet in which a value indicating QoS as an Inner DSCP value is set passes through an EPS bearer, a value indicating another QoS is set as an added Outer DSCP value in the S1 bearer section. If this happens, QoS cannot be guaranteed.

  FIG. 4 is a sequence diagram showing a conventional GTP encapsulation process. First, along the normal attach sequence, an EPS bearer is established between UE and S / PGW (an aggregate of SGW and PGW is referred to as “S / PGW” for convenience) (step S1). Subsequently, user packet transfer (relay) processing is performed between the UE and the server B (transfer from the UE to the server B is UL, and return transfer from the server B to the UE is DL). Specifically, first, the UE transmits a user packet to the eNB (step S2). It is assumed that the QoS parameter indicating that the priority is high is set in Inner for the user packet transmitted in S2. Next, the eNB transfers the user packet transmitted in S2 to the S / PGW (step S3). The user packet transferred in S3 is subjected to GTP encapsulation by the eNB, and an Outer including a QoS parameter indicating that the priority is low is added. The reason why the QoS parameter indicating that the priority is low is set in S3 even though the QoS parameter indicating that the priority is high is set in the user packet transmitted in S2 is, for example, This is because, as described above, the QoS parameter added as Outer is uniformly calculated from the QCI of the EPS bearer.

  Next, the S / PGW transfers the user packet transferred in S3 to the server B (step S4). The user packet transferred in S4 is subjected to GTP de-capsulation by S / PGW, and the Outer is removed, and the QoS indicating that the priority is high as in the user packet transmitted in S2. The parameter is set to Inner.

  Next, the server B transmits a user packet to the S / PGW (step S5). In the user packet transmitted in S5, a QoS parameter indicating that the priority is high is set to Inner, similarly to the user packet transmitted in S2. Next, the S / PGW transfers the user packet transmitted in S5 to the eNB (step S6). The user packet transferred in S6 is subjected to GTP encapsulation by S / PGW, and an Outer including a QoS parameter indicating that the priority is low is added. The reason why the QoS parameter indicating that the priority is low is set in S6 even though the QoS parameter indicating that the priority is high is set in the user packet transmitted in S5 is, for example, This is because, as described above, the QoS parameter added as Outer is uniformly calculated from the QCI of the EPS bearer.

  Next, the eNB transfers the user packet transferred in S6 to the UE (step S7). The user packet transferred in S7 is subjected to GTP de-capsuling by the eNB, and the Outer is removed, and the QoS parameter indicating that the priority is high is the same as the user packet transmitted in S5. Set to Inner.

  As shown in S3 and S6 above, with the conventional technology, it is difficult to guarantee QoS in the eNB to S / PGW section.

  In view of the above-described problems of the prior art, the communication system 7 according to the embodiment of the present invention allocates appropriate QoS parameters to user packets when the UE communicates via a mobile communication network (mobile network). The purpose is to maintain a certain communication quality. In order to achieve the object, the communication system 7 rewrites the DSCP value of the S1 bearer section with reference to, for example, the DSCP value and port number of the user packet. Thereby, the communication system 7 can perform QoS guarantee of the user packet for the mobile backhaul. This will be specifically described below.

  FIG. 5 is a diagram showing a system configuration of the communication system 7 according to the embodiment of the present invention. As illustrated in FIG. 5, the communication system 7 includes an eNB 1, an SGW 2, a PGW 3, an MME 4, a server 5, and a UE 6. eNB1, SGW2, PGW3, MME4, server 5, and UE6 are the same as eNB, SGW, PGW, MME, server, and UE described in the above-described conventional technology, respectively, and have similar functions. Only the difference will be described below. Note that eNB1 and SGW2 are nodes that relay packets in mobile communication such as LTE.

  FIG. 6 is a functional block diagram of eNB1. As illustrated in FIG. 6, the eNB 1 includes a reception unit 10, a storage unit 11, a determination unit 12, and a relay unit 13.

  The functional block diagram shown in FIG. 6 shows functional unit blocks. These functional blocks (components) are realized by any combination of hardware and / or software. Further, the means for realizing each functional block is not particularly limited. That is, each functional block may be realized by one device physically and / or logically coupled, and two or more devices physically and / or logically separated may be directly and / or indirectly. (For example, wired and / or wireless) and may be realized by these plural devices.

  For example, the eNB 1 may function as a computer. FIG. 7 is a diagram illustrating an example of a hardware configuration of the eNB 1. The eNB 1 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

  In the following description, the term “apparatus” can be read as a circuit, a device, a unit, or the like. The hardware configuration of the eNB 1 may be configured to include one or a plurality of devices illustrated in FIG. 7 or may be configured not to include some devices.

  Each function in the eNB 1 reads predetermined software (program) on hardware such as the processor 1001 and the memory 1002 so that the processor 1001 performs an operation to perform communication by the communication device 1004 and data in the memory 1002 and the storage 1003. This is realized by controlling reading and / or writing.

  For example, the processor 1001 controls the entire computer by operating an operating system. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like. For example, the above-described reception unit 10, determination unit 12, relay unit 13 and the like may be realized by the processor 1001.

  Further, the processor 1001 reads a program (program code), software module, and data from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the present embodiment is used. For example, the receiving unit 10, the determining unit 12, the relay unit 13, and the like described above may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and may be realized similarly for other functional blocks. Good. Although the above-described various processes have been described as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via a telecommunication line.

  The memory 1002 is a computer-readable recording medium and includes, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. May be. The memory 1002 may be called a register, a cache, a main memory (main storage device), or the like. The memory 1002 can store a program (program code), a software module, and the like that can be executed to perform the paging method according to the present embodiment.

  The storage 1003 is a computer-readable recording medium such as an optical disc such as a CD-ROM (Compact Disc ROM), a hard disc drive, a flexible disc, a magneto-optical disc (eg, a compact disc, a digital versatile disc, a Blu-ray). (Registered trademark) disk, smart card, flash memory (for example, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like. The storage 1003 may be referred to as an auxiliary storage device. The storage medium described above may be, for example, a database, server, or other suitable medium including the memory 1002 and / or the storage 1003. For example, the storage unit 11 described above may be realized by the storage 1003.

  The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like. For example, the receiving unit 10 and the relay unit 13 described above may be realized by the communication device 1004.

  The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, or the like) that accepts an external input. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside. The input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

  Each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured with a single bus or may be configured with different buses between apparatuses.

  The eNB 1 includes hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA). Alternatively, some or all of the functional blocks may be realized by the hardware. For example, the processor 1001 may be implemented by at least one of these hardware.

  Hereinafter, each functional block of the eNB 1 illustrated in FIG. 6 will be described.

  The receiving unit 10 receives a user packet transmitted from the UE 6 or the like. The reception unit 10 outputs the received user packet to the determination unit 12 and the relay unit 13.

  The storage unit 11 stores correspondence information in which a parameter included in a user packet is associated with a QoS parameter related to QoS. FIG. 8 is a diagram illustrating four examples of correspondence information stored by the storage unit 11. FIG. 8A is a table example of correspondence information in which a port number (parameter) included in a user packet is associated with a DSCP value (QoS parameter) assigned to Outer. FIG. 8B is a table example of correspondence information in which a DSCP value (parameter) included in a user packet is associated with a DSCP value (QoS parameter) assigned to Outer. FIG. 8C is a table example of correspondence information in which a destination IP address (parameter) included in a user packet is associated with a DSCP value (QoS parameter) assigned to Outer. FIG. 8D is a table example of correspondence information in which a destination HTTP (Hypertext Transfer Protocol) address (parameter) included in a user packet is associated with a DSCP value (QoS parameter) assigned to Outer.

  The determination unit 12 determines a QoS parameter based on one or more (including a plurality of) parameters included in the user packet received (output) by the reception unit 10. The determination unit 12 may determine the QoS parameter further based on the correspondence information stored by the storage unit 11. The determination unit 12 outputs the determined QoS parameter to the relay unit 13.

  For example, the determination unit 12 acquires (captures) the DSCP value included in the user packet received by the reception unit 10, and determines the same DSCP value as the acquired DSCP value as the QoS parameter.

  For example, the determination unit 12 acquires the port number included in the user packet received by the reception unit 10, and the acquired port in the correspondence information table example illustrated in FIG. 8A stored in the storage unit 11. The DSCP value to be assigned to the Outer associated with the number is acquired, and the DSCP value to be assigned to the acquired Outer is determined as a QoS parameter.

  Further, for example, the determination unit 12 acquires the DSCP value included in the user packet received by the reception unit 10, and acquires the acquired DSCP in the correspondence information table example illustrated in FIG. 8B stored by the storage unit 11. The DSCP value assigned to the Outer associated with the value is acquired, and the DSCP value assigned to the acquired Outer is determined as a QoS parameter.

  Also, for example, the determination unit 12 acquires the destination IP address included in the user packet received by the reception unit 10 and acquires the destination IP address stored in the storage unit 11 in the correspondence information table example illustrated in FIG. The DSCP value assigned to the Outer associated with the destination IP address is acquired, and the DSCP value assigned to the acquired Outer is determined as a QoS parameter.

  Further, for example, the determination unit 12 acquires the destination HTTP address included in the user packet received by the reception unit 10 and acquires the destination HTTP address stored in the storage unit 11 in the correspondence information table example illustrated in FIG. The DSCP value assigned to the Outer associated with the destination HTTP address is acquired, and the DSCP value assigned to the acquired Outer is determined as a QoS parameter.

  Further, for example, the determination unit 12 acquires the port number and the destination HTTP address included in the user packet received by the reception unit 10, and in the correspondence information table example illustrated in FIG. 8A stored by the storage unit 11. The DSCP value to be assigned to the Outer associated with the acquired port number is acquired, and in the example of the correspondence information table shown in FIG. 8D stored by the storage unit 11, the DSCP value is associated with the acquired destination HTTP address. The DSCP value to be assigned to the obtained Outer is acquired, the final DSCP value is calculated based on the comparison result of the DSCP values to be assigned to the two obtained Outers, the weighting by the weighting coefficient, the average value, etc. The final DSCP value is determined as the QoS parameter. In this example, the port number and destination HTTP address included in the user packet are used. However, the final DSCP value is similarly calculated using the port number, DSCP value, destination IP address and destination HTTP address included in the user packet. For example, the determination unit 12 may determine a QoS parameter based on a plurality of parameters.

  In addition, although it has been described that the determination unit 12 uses (refers to) the correspondence information stored in the storage unit 11, the correspondence information is not in the eNB 1 but in other nodes included in the communication system 7 or the communication system 7. Stored in the external server outside, the determination unit 12 obtains correspondence information from other nodes and external servers through network access, etc., and uses the correspondence information obtained when determining the QoS parameters. Also good.

  The relay unit 13 adds (encapsulates) the QoS parameter determined (output) by the determination unit 12 to the user packet received (output) by the reception unit 10 and relays (transmits) it to the next node or the like. For example, the relay unit 13 sets the DSCP value, which is the QoS parameter determined by the determination unit 12, as the DSCP value of the Outer IP Header added to the user packet received from the UE 6 by the receiving unit 10, and relays it to the SGW 2 To do. In the present embodiment, “add to user packet” may be replaced with “rewrite header of user packet”. That is, the relay unit 13 may rewrite the partial information of the header encapsulated by the function of the existing eNB or the like to the QoS parameter determined by the determination unit 12.

  The above is an explanation of each functional block of eNB1.

  FIG. 9 is a functional block diagram of the SGW 2, and FIG. 10 is a diagram illustrating a hardware configuration of the SGW 2. The SGW2 reception unit 20, storage unit 21, determination unit 22, and relay unit 23 shown in FIG. 9, and the SGW2 processor 2001, memory 2002, storage 2003, communication device 2004, input device 2005, and output device 2006 shown in FIG. And the bus 2007 are the receiving unit 10, the storing unit 11, the determining unit 12 and the relay unit 13 of the eNB 1 illustrated in FIG. 6, and the processor 1001, the memory 1002, the storage 1003, the communication device 1004 of the eNB 1 illustrated in FIG. Since it is the same as the input device 1005, the output device 1006, and the bus 1007, description thereof is omitted.

  FIG. 11 is a sequence diagram showing a GTP encapsulation process (control method) by the communication system 7 according to the present embodiment. First, an EPS bearer is established between the UEs 6 and S / PGWs 2 and 3 along a normal attach sequence (step S10). Subsequently, user packet transfer (relay) processing is performed between UE6 and server 5B (transfer from UE6 to server 5B is UL, and return transfer from server 5B to UE6 is DL). Specifically, first, the UE 6 transmits a user packet to the eNB 1 (step S11). It is assumed that the QoS parameter indicating that the priority is high is set in Inner for the user packet transmitted in S11. Next, in eNB1, the DTP value of GTP is rewritten (step S12, relay step). Specifically, the QoS parameter (QoS parameter indicating that the priority is high) set in the user packet transmitted in S11 by the reception unit 10, the storage unit 11, the determination unit 12, and the relay unit 13 of the eNB1. Based on the correspondence information, the QoS parameter to be added to the Outer (QoS parameter indicating that the priority is high) is determined, and the Outer in which the determined QoS parameter is set (rewritten) is transmitted in S11. It is added to the user packet. Next, the relay unit 13 of the eNB 1 transfers the user packet to which Outer is added in S 12 to the S / PGWs 2 and 3 (step S 13, relay step).

  Next, decapsulation of GTP is performed in S / PGWs 2 and 3 (step S14). Specifically, the Outer of the user packet transmitted in S13 is removed by S / PGWs 2 and 3. Next, the S / PGWs 2 and 3 transfer the user packet de-encapsulated in S14 to the server 5B (step S15). In the user packet transferred in S15, a QoS parameter indicating that the priority is high is set to Inner, similarly to the user packet transmitted in S11.

  Next, the server 5B transmits a user packet to the S / PGWs 2 and 3 (step S16). In the user packet transmitted in S16, a QoS parameter indicating that the priority is high is set in Inner as in the user packet transmitted in S11. Next, the DTP value of GTP is rewritten in S / PGWs 2 and 3 (step S17, relay step). Specifically, the QoS parameter (QoS parameter indicating that the priority is high) set in the user packet transmitted in S16 by the receiving unit 20, the storage unit 21, the determining unit 22, and the relay unit 23 of the SGW 2 Based on the correspondence information, the QoS parameter to be added to the Outer (QoS parameter indicating that the priority is high) is determined, and the Outer in which the determined QoS parameter is set (rewritten) is transmitted in S16. It is added to the user packet. Next, the relay unit 23 of the SGW 2 transfers the user packet to which Outer is added in S17 to the eNB 1 (Step S18, relay step).

  Next, GTP de-capsuling is performed in eNB1 (step S19). Specifically, Outer of the user packet transmitted in S18 is removed by eNB1. Next, eNB1 transfers the user packet decapsulated in S19 to UE6 (step S20). In the user packet transferred in S20, the QoS parameter indicating that the priority is high is set to Inner, similarly to the user packet transmitted in S16.

  As shown in S13 and S18 above, in the communication system 7 according to the present embodiment, QoS guarantee can be performed for the eNB1 to S / PGW2 and 3 sections. That is, communication can be performed without dropping the priority even in the S1 bearer section.

  In addition, when relaying a packet, the node that adds the QoS parameter based on the parameter included in the packet (rewrites the DSCP value of the Outer IP Header) is not limited to the eNB1 and the SGW2, as described above. For example, any (proxy) node (for example, a terminal device of IPSec) existing in the S1 bearer section may be used.

  Next, the operation and effect of the communication system 7 configured as in the present embodiment will be described.

  According to the communication system 7 of this embodiment, the QoS parameter determined based on the parameter included in the received user packet is added to the user packet and relayed. Thereby, for example, since an appropriate QoS parameter can be added and relayed for each packet, the communication quality for each packet can be more appropriately ensured.

  Further, according to the communication system 7 of the present embodiment, QoS parameters determined based on a plurality of parameters included in the received user packet are added to the user packet and relayed. Accordingly, since it is possible to relay by adding a more appropriate QoS parameter reflecting the status of the user packet, it is possible to more appropriately guarantee the communication quality for each packet.

  Further, according to the communication system 7 of the present embodiment, the QoS parameter is determined further based on the correspondence information in which the parameter and the QoS parameter are associated with each other. As a result, since it is possible to relay with an appropriate QoS parameter added more reliably and at a higher speed, it is possible to more appropriately guarantee the communication quality for each packet.

  Although the present embodiment has been described in detail above, it will be apparent to those skilled in the art that the present embodiment is not limited to the embodiment described in this specification. The present embodiment can be implemented as a modification and change without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present embodiment.

  The notification of information is not limited to the aspect / embodiment described in the present specification, and may be performed by other methods. For example, notification of information includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block))), other signals, or a combination thereof. The RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup message, an RRC connection reconfiguration message, or the like.

  Each aspect / embodiment described herein includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA. (Registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-WideBand), The present invention may be applied to a Bluetooth (registered trademark), a system using another appropriate system, and / or a next generation system extended based on the system.

  As long as there is no contradiction, the order of the processing procedures, sequences, flowcharts, and the like of each aspect / embodiment described in this specification may be changed. For example, the methods described herein present the elements of the various steps in an exemplary order and are not limited to the specific order presented.

  The specific operation that is assumed to be performed by a specific device in this specification may be performed by the upper node in some cases. For example, when a specific device is a base station, various operations performed for communication with a terminal in a network including one or a plurality of network nodes having the base station are: It is clear that this can be done by the base station and / or other network nodes other than the base station (for example, but not limited to MME or S-GW). Although the case where there is one network node other than the base station in the above is illustrated, a combination of a plurality of other network nodes (for example, MME and S-GW) may be used.

  Information or the like can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.

  Input / output information or the like may be stored in a specific location (for example, a memory) or may be managed by a management table. Input / output information and the like can be overwritten, updated, or additionally written. The output information or the like may be deleted. The input information or the like may be transmitted to another device.

  The determination may be performed by a value represented by 1 bit (0 or 1), may be performed by a true / false value (Boolean: true or false), or may be performed by comparing numerical values (for example, a predetermined value) Comparison with the value).

  Each aspect / embodiment described in this specification may be used independently, may be used in combination, or may be switched according to execution. In addition, notification of predetermined information (for example, notification of being “X”) is not limited to explicitly performed, but is performed implicitly (for example, notification of the predetermined information is not performed). Also good.

  Software, whether it is called software, firmware, middleware, microcode, hardware description language, or other names, instructions, instruction sets, codes, code segments, program codes, programs, subprograms, software modules , Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc. should be interpreted broadly.

  Also, software, instructions, etc. may be transmitted / received via a transmission medium. For example, software may use websites, servers, or other devices using wired technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or wireless technology such as infrared, wireless and microwave. When transmitted from a remote source, these wired and / or wireless technologies are included within the definition of transmission media.

  Information, signals, etc. described herein may be represented using any of a variety of different technologies. For example, data, commands, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these May be represented by a combination of

  Note that the terms described in this specification and / or terms necessary for understanding this specification may be replaced with terms having the same or similar meaning. For example, the channel and / or symbol may be a signal. The signal may be a message. Further, the component carrier (CC) may be called a carrier frequency, a cell, or the like.

  As used herein, the terms “system” and “network” are used interchangeably.

In addition, information, parameters, and the like described in this specification may be represented by absolute values, may be represented by relative values from a predetermined value, or may be represented by other corresponding information. . For example, the radio resource may be indicated by an index.

  The names used for the parameters described above are not limiting in any way. Further, mathematical formulas and the like that use these parameters may differ from those explicitly disclosed herein. Since various channels (eg, PUCCH, PDCCH, etc.) and information elements (eg, TPC, etc.) can be identified by any suitable name, the various names assigned to these various channels and information elements are However, it is not limited.

  A base station may accommodate one or more (eg, three) cells (also referred to as sectors). When the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (eg, indoor small base station RRH: Remote Radio Head) can also provide communication services. The term “cell” or “sector” refers to part or all of the coverage area of a base station and / or base station subsystem that provides communication services in this coverage. Further, the terms “base station”, “eNB”, “cell”, and “sector” may be used interchangeably herein. A base station may also be referred to in terms such as a fixed station, NodeB, eNodeB (eNB), access point, femtocell, small cell, and the like.

  A mobile communication terminal is defined by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, It may also be referred to as a wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate terminology.

  As used herein, the terms “determining” and “determining” may encompass a wide variety of actions. “Judgment”, “determination” can be, for example, calculating, computing, processing, deriving, investigating, looking up (eg, table, database or another (Search in the data structure), and confirming (ascertaining) that it is “determined” and “determined” may be included. In addition, “determination” and “determination” are reception (for example, receiving information), transmission (for example, transmitting information), input (input), output (output), and access. (Accessing) (eg, accessing data in a memory) may be considered as “determined” or “determined”. In addition, “determination” and “determination” means that “resolving”, “selecting”, “choosing”, “establishing”, and “comparing” are regarded as “determining” and “determining”. May be included. In other words, “determination” and “determination” may include considering some operation as “determination” and “determination”.

  The terms “connected”, “coupled”, or any variation thereof, means any direct or indirect connection or coupling between two or more elements and It can include the presence of one or more intermediate elements between two “connected” or “coupled” elements. The coupling or connection between the elements may be physical, logical, or a combination thereof. As used herein, the two elements are radio frequency by using one or more wires, cables and / or printed electrical connections, and as some non-limiting and non-inclusive examples By using electromagnetic energy, such as electromagnetic energy having a wavelength in the region, microwave region, and light (both visible and invisible) region, it can be considered to be “connected” or “coupled” to each other.

  As used herein, the phrase “based on” does not mean “based only on,” unless expressly specified otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”

  Where the designation "first", "second", etc. is used herein, any reference to that element does not generally limit the amount or order of those elements. These designations can be used herein as a convenient way to distinguish between two or more elements. Thus, a reference to the first and second elements does not mean that only two elements can be employed there, or that in some way the first element must precede the second element.

  The “means” in the configuration of each apparatus described above may be replaced with “unit”, “circuit”, “device”, and the like.

  As long as "include", "including", and variations thereof are used in the specification or claims, these terms are similar to the term "comprising". It is intended to be comprehensive. Furthermore, the term “or” as used herein or in the claims is not intended to be an exclusive OR. In this specification, a plurality of devices are also included unless there is only one device that is clearly present in context or technically.

  Throughout this disclosure, the plural is included unless the context clearly indicates one.

  DESCRIPTION OF SYMBOLS 1 ... eNB, 2 ... SGW, 3 ... PGW, 4 ... MME, 5 ... Server, 6 ... UE, 7 ... Communication system, 10 ... Reception part, 11 ... Storage part, 12 ... Determination part, 13 ... Relay part, 20 ... receiving part, 21 ... storage part, 22 ... determination part, 23 ... relay part.

Claims (3)

A control method for guaranteeing communication quality, executed by a node that relays a packet in mobile communication,
A relay step of determining a QoS parameter related to QoS (Quality of Service) based on a parameter included in the received packet, adding the QoS parameter to the packet, and relaying the packet;
Control method. The relay step determines the QoS parameter based on a plurality of the parameters included in the received packet;
The control method according to claim 1. The relay step further determines the QoS parameter based on correspondence information in which the parameter is associated with the QoS parameter;
The control method according to claim 1 or 2.

Images