JP5059440B2 - Base station apparatus, user apparatus, and radio bearer setting method - Google Patents

Description

  The present invention relates to an LTE (Long Term Evolution) system, and more particularly to a base station apparatus, a user apparatus, and a radio bearer setting method.

  A communication method succeeding W-CDMA and HSDPA (generic name UMTS), that is, LTE (Long Term Evolution) has been studied by the UMTS standardization organization 3GPP. As for the uplink, SC-FDMA (Single-Carrier Frequency Multiple Access) has been studied (for example, see Non-Patent Document 1).

  In addition, in 3GPP, when a base station apparatus of an LTE system is newly installed, the new base station apparatus and a network are connected with a cable, and power is turned on so that automatic setting is performed. Has been proposed (see Non-Patent Document 2). In order to realize this automatic setting, in LTE, the realization of a self-configuration (Self-configuration) function and a self-optimization function of a radio network, particularly a base station apparatus (eNB: eNodeB), has been studied. ing.

  The self-configuration function is a function for obtaining basic information for system operation by a procedure that is automatically installed when a base station apparatus is newly installed. This self-configuration function is executed in the pre-operation state.

The self-optimization function refers to a function that automatically optimizes performance such as transmission capacity, transmission delay, and frequency power utilization efficiency of a wireless network constituted by a plurality of user apparatuses and base station apparatuses. This self-optimization function is executed in the operation state. A network in which the self-configuration function and the self-optimization function are implemented is called a self-organizing network (SON). In order to realize this self-organizing network, when newly installing a base station apparatus, radio parameters are set based on the reception quality at each point of radio waves transmitted from the newly installed base station apparatus. There is a need. Specifically, a proposal using a measurement report from a user equipment (UE: User Equipment) has been made (for example, see Non-Patent Document 3).
3GPP TR 25.814 (V7.0.0), “Physical Layer Aspects for Evolved UTRA,” June 2006 3GPP R2-061929 June 2006 3GPP R2-070063, January 2007

  The measurement report from the user apparatus for the purpose of the self-organizing network described above is performed in an RRC (Radio Resource Control) layer, that is, layer 3.

  However, the measurement for the purpose of the self-organizing network is not urgent as compared with normal RRC or NAS (Non Access Stratum) control. In RRC, processing between a radio network, that is, a base station apparatus in a RAN (Radio Access Network) and a user apparatus, for example, handover control, radio bearer (RB) establishment, and the like are performed. In the radio bearer establishment, the radio bearer is set and released, the radio bearer parameter is changed, and the like. In NAS, signaling performed between a core network, for example, MME (Mobility Management Entity) and a user apparatus, for example, authentication processing, security processing, standby position registration processing, and the like are performed. That is, in normal RRC and NAS, control related to currently performed communication and control necessary for actual communication are performed, and it is necessary to reduce the control delay. For example, if the handover control is delayed, it becomes impossible to connect to an optimal cell, and a fatal problem such as disconnection of communication may occur. Further, if the position registration control is delayed, there is an increased possibility that paging cannot be performed and incoming calls cannot be made.

  On the other hand, measurements aimed at self-organizing networks handled (handled) in the same RRC layer do not directly affect communications performed by the reporting user equipment. In order to adjust the parameters of the newly established base station, it is necessary to collect a certain amount of measurement reports, and individual measurement reports do not need to be performed immediately. Therefore, some delay is allowed. Therefore, the measurement for the purpose of self-organizing network does not need to be handled with the same priority as normal RRC or NAS control.

  Therefore, an object of the present invention is to provide a base station apparatus, a user apparatus, and a radio bearer setting method that can acquire information for forming a self-organizing network without affecting normal RRC or NAS control. It is to provide.

In order to solve the above problems, the base station apparatus of the present invention
The user equipment residing in an area the base station apparatus covers, the reception quality of a reference symbol transmitted from the periphery of the cell of the base station apparatus is measured, a base station apparatus to report the measured values:
Multiple signaling radio bearers handled by RRC;
RRC protocol control means for notifying the user apparatus of a signaling radio bearer setting command for setting a signaling radio bearer for transmitting the measurement value among the plurality of signaling radio bearers;
A scheduler for scheduling signaling radio bearers according to the priority of each signaling radio bearer;
With
One of the characteristics is that a lower priority is assigned to a signaling radio bearer that transmits the measurement value than a signaling radio bearer handled by RRC other than the signaling radio bearer that transmits the measurement value .

  With this configuration, it is possible to acquire information for forming a self-organizing network without affecting normal RRC or NAS control. Specifically, information such as reception quality at each point of radio waves transmitted from the base station apparatus can be acquired.

The user device of the present invention
A user apparatus that reports a measurement value of a reception quality of a reference symbol transmitted from a cell around the base station apparatus to a base station apparatus that covers an area where the user apparatus is located:
By the base station apparatus, in accordance with the priority of each signaling radio bearer, signaling radio bearer scheduling is performed, the signaling radio bearer the measured value is transmitted, other than signaling radio bearer the measured value is transmitted A lower priority is assigned than a signaling radio bearer handled by RRC, and a signaling radio bearer setting command for setting a signaling radio bearer for reporting the measurement value and a measurement control command for measuring the reception quality are transmitted. And
The user equipment is
Multiple signaling radio bearers handled by RRC;
Based on the signaling radio bearer setting command, among the plurality of signaling radio bearers,
RRC protocol control means for setting a signaling radio bearer for transmitting the measurement value;
With
One of the characteristics is that the measured value measured according to the measurement control command is transmitted by the set signaling radio bearer.

  By configuring in this way, the signaling radio bearer for the self-organizing network is set according to the signaling radio bearer setting command and the measurement command transmitted from the base station apparatus, and the signaling radio bearer for the self-organizing network is used. , The measured measurement value can be transmitted.

The radio bearer setting method of the present invention includes:
The user equipment residing in an area the base station apparatus covers, the self reception quality of a reference symbol transmitted from the peripheral cell of the base station apparatus is measured, the radio bearer in the base station apparatus to report the measured value Setting method:
A scheduling step of scheduling signaling radio bearers according to the priority of each signaling radio bearer;
A signaling radio bearer setting step of setting a signaling radio bearer for transmitting the measurement value among a plurality of signaling radio bearers handled by RRC;
A signaling radio bearer notification step of notifying the user equipment of a signaling radio bearer setting command indicating the setting of the signaling radio bearer;
A measurement value receiving step of receiving the measurement value by the set signaling radio bearer;
I have a,
Wherein the signaling radio bearer for transmitting the measurements to Rukoto One feature low priority is assigned than the signaling radio bearers to be handled by the signaling radio bearers other than the RRC for transmitting the measured values.

  In this way, information for forming a self-organizing network can be acquired without affecting normal RRC or NAS control. Specifically, information such as reception quality at each point of radio waves transmitted from the base station apparatus can be acquired.

  According to an embodiment of the present invention, a base station apparatus, a user apparatus, and a radio bearer setting method capable of acquiring information for forming a self-organizing network without affecting normal RRC or NAS control Can be realized.

  Next, the best mode for carrying out the present invention will be described based on the following embodiments with reference to the drawings.

  In all the drawings for explaining the embodiments, the same reference numerals are used for those having the same function, and repeated explanation is omitted.

  A mobile communication system to which a base station apparatus and a user apparatus according to an embodiment of the present invention are applied will be described with reference to FIG.

  The mobile communication system is a system to which, for example, Evolved UTRA and UTRAN (also known as Long Term Evolution, or Super 3G) is applied.

The mobile communication system includes a base station (eNB: eNode B) 200 _m (m is an integer of m> 1) and a user apparatus (UE: User Equipment) 100 _n (n is an integer of n> 0). . FIG. 1 shows base stations 200 ₁ , 200 ₂ , 200 ₃ and 200 ₄ and user apparatuses 100 ₁ , 100 ₂ , 100 ₃ and 100 ₄ . The cells covered by the base stations 200 ₁ , 200 ₂ , 200 ₃ and 200 ₄ are called cells 250 ₁ , 250 ₂ , 250 ₃ and 250 ₄ , respectively.

An access gateway device (aGW: access gateway) 300 is provided in the core network 500, for example. It may be provided in a network other than the core network. The access gateway device may be divided into logical entities of a control plane (C-plane) and a user plane (U-plane), and may be used as MME (Mobility Management Entity) / UPE (User Plane Entity). The core network 500 includes a home location register (HLR) 400. The home location register holds an identifier of an access gateway device that manages each user device 100 _n . In the present embodiment, as an example, a case will be described in which the base station 200 ₄ is newly installed.

  Next, the base station apparatus 200 according to an embodiment of the present invention will be described with reference to FIG.

  The base station apparatus 200 according to the present embodiment includes a network interface 202, an RRC protocol control unit 204, an RRC radio bearer processing unit 206, an SON radio bearer processing unit 208, an NAS radio bearer processing unit 210, and a VoIP. (Voice over IP) radio bearer processing unit 212, Web radio bearer processing unit 214, scheduler 216, multiplexing unit 218, HARQ (Hybrid Automatic repeat request) processing unit 220, and physical layer processing unit (PHY) 222.

  In the RRC protocol control unit 204, the RRC radio bearer processing unit 206, the SON radio bearer processing unit 208, the NAS radio bearer processing unit 210, the VoIP radio bearer processing unit 212, and the Web radio bearer processing unit 214, PDCP (Packet Processing in Data Convergence Protocol (RLC) and Radio Link Control (RLC) sublayer is performed, and processing in MAC (Medium Access Control) sublayer is performed in scheduler 216, multiplexing unit 218, and HARQ processing unit 220.

  In this embodiment, a case where a VoIP bearer and a web browsing bearer are provided as user plane (U-Plane) bearers will be described. However, only one of them may be provided. However, other bearers may be provided. For example, a bearer for gaming, a bearer for MPEG (Moving Picture Experts Group), a bearer for HTTP (HyperText Transfer Protocol), a bearer for FTP (File Transfer Protocol), and a bearer for E-a It may be.

  2 shows a radio bearer corresponding to one user. When a plurality of users are multiplexed, the RRC radio bearer processing unit 206 and the SON radio bearer processing unit 208 are provided by the number of users. A NAS radio bearer processing unit 210, a VoIP radio bearer processing unit 212, and a Web radio bearer processing unit 214 are prepared. The combination of these bearers may differ depending on the service used by the user. Further, the RRC protocol processing unit 204 is shared by a plurality of users.

  The network interface 202 provides an interface (S1 interface) with an upper station, for example, the access gateway apparatus 300 and an interface (X2 interface) with an adjacent base station apparatus.

The RRC protocol control unit 204 performs self-organizing networks (SON: Self-organizing networks) (referred to as SON) with respect to the user apparatus 100 _n located in the area covered by the base station apparatus 200. Then, it is determined that the reception quality of a reference symbol (pilot signal) transmitted from the newly installed base station apparatus is measured and the measurement value is reported. Hereinafter, the user apparatus 100 _n located in the area covered by the base station apparatus is caused to measure the reception quality of the reference symbol transmitted from the newly installed base station apparatus, and the measured values (SIR, reception level, reception position Reporting information) is called SON measurement.

Here, the newly installed base station apparatus will be described. The newly installed base station apparatus is newly installed and is in a pre-operation state that is a state before the start of operation. The newly installed base station apparatus broadcasts information indicating the pre-operation state, for example, an indicator indicating the pre-operation state. The pre-operation state refers to the state of the newly installed base station apparatus before starting operation. The new base station apparatus is turned on after being connected to the network by a cable, for example. For example, when connected to an IP network, IP address determination, server detection, authentication processing, association with an upper node, software activation, and the like are performed. After these operations are performed, the newly installed base station apparatus transmits a reference symbol, a synchronization channel, and a minimum amount of broadcast information, but cannot provide a communication service to the user yet. This state is called a pre-operation state. Therefore, in this pre-operation state, the user apparatus 100 _n cannot stand by in the cell and cannot access the cell.

The RRC protocol control unit 204 may cause the user apparatus 100 _n to perform the SON measurement only once, or may perform the SON measurement at a predetermined cycle. In the case where it is performed at a predetermined period, the RRC protocol control unit 204 may apply persistent scheduling to the user apparatus 100 _n . For example, the RRC protocol control unit 204 determines whether to apply persistent scheduling for each radio bearer. In this case, persistent scheduling parameters are controlled in units of radio bearers.

  Here, in a packet scheduling system using an uplink common physical channel such as LTE, data of each user, an RRC control signal, and a NAS control signal are transmitted using resource blocks divided in a time direction and a frequency direction. The base station apparatus schedules resource block allocation in consideration of the amount of retained data and priority of each user or each radio bearer. The base station apparatus notifies the resource block allocation information to the user apparatus through the layer 1 / layer 2 control channel (L1 / L2 control channel). The user apparatus transmits data using the allocated resource block. The user apparatus reports the data retention amount in the uplink transmission buffer periodically or when transmitting data, and makes an allocation request to the base station apparatus. That is, a scheduling request is made. The buffer retention amount may be reported for each radio bearer.

  In order to reduce the signaling of such scheduling assignment information, persistent scheduling can be applied. For example, in the case of VoIP, small packets occur frequently, and severe delay conditions are imposed on individual packets. When such a service is provided, there is a problem that signaling overhead increases. Therefore, persistent scheduling can be applied to reduce signaling in VoIP. In persistent scheduling, for example, a resource block to be allocated every 20 ms when a VoIP packet is generated is determined in advance, and this allocation information is collectively notified to the user apparatus. MCS (Modulation and Coding Scheme) to be applied, transport format, etc. may be notified at the same time.

Even in the SON measurement, it is conceivable to periodically report the SON measurement. This is advantageous for obtaining sufficient measurement reports and increasing the confidence of self-organization. Persistent scheduling may also be applied for SON measurements to reduce signaling associated with SON measurement reports. In this case, the RRC protocol control unit 204 generates a persistent scheduling control command and transmits it to the user apparatus 100 _n . This persistent scheduling allocation control command includes resource block allocation information. Further, information on MCS and transport format may be included. The RRC protocol control unit 204 may transmit the persistent scheduling assignment control command as an RRC message using the RRC radio bearer or may transmit the persistent scheduling assignment control command using the SON radio bearer. In this way, it is possible for the user apparatus 100 _n, reduces the number of times of transmitting a scheduling request and the L1 / L2 control channel. Note that the persistent scheduling assignment control command may be processed by the MAC protocol or may be transmitted as a MAC control PDU.

  Further, the RRC protocol control unit 204 creates an SRB (signaling radio bearer) instance, that is, data of a signaling radio bearer for SON. Also, the RRC protocol control unit 204 creates a measurement command including specific measurement items. The measurement items include, for example, SIR, user apparatus location information, reporting cycle, and the like.

  The RRC radio bearer processing unit 206 performs RRC radio bearer processing. For example, as a radio link control (RLC) function, segmentation / concatenation, that is, processing for dividing one packet into a plurality of TTIs, processing for combining the divided TTIs into packets, and reordering (Reordering) processing and retransmission processing are performed. Further, as processing in the security layer, concealment processing (ciphering), integrity protection (integrity protection), that is, encoding / decoding processing for detecting whether data has been tampered with is performed.

  The SON radio bearer processing unit 208 performs processing of the SON radio bearer. This radio bearer for SON is handled by RRC. That is, the base station apparatus 200 according to the present embodiment includes a plurality of signaling radio bearers handled by RRC. For example, as the RLC function, segmentation / concatenation, that is, processing for dividing one packet into a plurality of TTIs, processing for combining the divided TTIs into packets, reordering processing, and retransmission processing are performed. As security layer processing, confidentiality processing and integrity protection processing are performed.

  The NAS radio bearer processing unit 210 performs processing of a radio bearer for NAS (Non Access Stratum). For example, as the RLC function, segmentation / concatenation, that is, processing for dividing one packet into a plurality of TTIs, processing for combining the divided TTIs into packets, reordering processing, and retransmission processing are performed. As security layer processing, confidentiality processing and integrity protection processing are performed.

  The VoIP radio bearer processing unit 212 performs processing of a VoIP radio bearer. For example, as the RLC function, segmentation / concatenation, that is, processing for dividing one packet into a plurality of TTIs, processing for combining the divided TTIs into packets, reordering processing, and retransmission processing are performed. As security layer processing, confidentiality processing and integrity protection processing are performed. In addition, header compression (HC: Header Compression) performed on the U-plane bearer is performed.

  A web bearer processing unit 212 for web (Web) performs processing of a radio bearer for web browsing. For example, as the RLC function, segmentation / concatenation, that is, processing for dividing one packet into a plurality of TTIs, processing for combining the divided TTIs into packets, reordering processing, and retransmission processing are performed. As security layer processing, confidentiality processing and integrity protection processing are performed. Also, header compression is performed on U-plane bearers.

  The scheduler 216 performs bearer scheduling. For example, the scheduler 216 performs scheduling so that the priority becomes higher in the order of RRC radio bearer, NAS radio bearer, VoIP radio bearer, Web radio bearer, and SON radio bearer. That is, the radio bearer for SON that transmits the SON measurement command and the SON measurement report includes the handover command, the radio bearer setting command, the measurement command necessary for handover control, the radio bearer for RRC that transmits the measurement report, and the NAS. Is assigned a lower priority than other radio bearers.

  The multiplexing unit 218 multiplexes radio bearers on the transport channel. For example, the multiplexing unit 210 maps the radio bearer on the transport channel.

  The radio bearer multiplexed on the transport channel is transmitted after processing related to the physical layer is performed in the physical layer processing unit 222.

The HARQ processing unit 220 performs retransmission control using HARQ.
Next, the user apparatus 100 _n according to _an embodiment of the present invention will be described with reference to FIG.

The user apparatus 100 _{n according} to the present embodiment includes an application interface 102, an RRC protocol control unit 104, an RRC radio bearer processing unit 106, an SON radio bearer processing unit 108, an NAS radio bearer processing unit 110, and VoIP. A radio bearer processing unit 112, a web radio bearer processing unit 114, a scheduler 116, a multiplexing unit 118, a HARQ processing unit 120, and a physical layer processing unit (PHY) 122 are provided.

In this embodiment, a description will be given of a case where a bearer for VoIP and a bearer for web browsing are provided as bearers belonging to the user plane. However, only one of them may be provided, or another bearer may be provided. It may be. For example, a bearer for gaming, a bearer for MPEG, a bearer for HTTP, a bearer for FTP, and a bearer for E-mail may be provided. The number of radio bearers that can be set simultaneously is determined by a service that the user apparatus 100 _n supports simultaneously. For example, at least the RRC signaling radio bearer, the NAS signaling radio bearer, and the SON signaling radio bearer need to have a processing capability that can be set simultaneously.

  The application interface 102 is an interface with an application. It may be an interface with TCP / IP protocol or UDP / IP protocol.

  The RRC protocol control unit 104 sets the reception quality of the reference symbols transmitted from the newly installed base station apparatus to the own user apparatus 100 from the base station apparatus 200 that covers the area in which the RRC protocol control unit 104 is located. The SON radio bearer is set according to the SON signaling radio bearer (SRB) setting command transmitted when it is determined to measure and report the measurement value.

Further, the user apparatus 100 _n measures, for example, the reception quality of the reference symbol transmitted from the newly installed base station apparatus, according to the measurement command notified by the base station apparatus 200.

The RRC protocol control unit 104 creates a SRB instance for SON, that is, a signaling radio bearer for SON. In addition, the RRC protocol control unit 104 sends a measurement report (SON measurement report) including the reception quality of the reference symbol transmitted from the newly installed base station device to the SON radio bearer processing unit 108, for example. The measurement report is processed by the SON radio bearer processing unit 108 and transmitted in the resource block assigned to the scheduler. Specifically, the user apparatus 100 _n transmits a scheduling request for transmitting a measurement report to the base station apparatus 200, and receives resource block allocation information from the base station apparatus 200 using the L1 / L2 control channel. Then, a measurement report is transmitted using the allocated resource block. When persistent scheduling is applied to the radio bearer for SON, according to the persistent scheduling assignment control command transmitted from the base station apparatus 200, a measurement report is transmitted using the notified resource block. In this case, the scheduling request is not transmitted one by one. Also, signaling by the L1 / L2 control channel is not performed.

  The RRC radio bearer processing unit 106 performs processing of an RRC radio bearer. For example, as the RLC function, segmentation / concatenation, that is, processing for dividing one packet into a plurality of TTIs, processing for combining the divided TTIs into packets, reordering processing, and retransmission processing are performed. As security layer processing, confidentiality processing and integrity protection processing are performed.

The SON radio bearer processing unit 108 performs processing of the SON radio bearer. This radio bearer for SON is handled by RRC. That is, the user apparatus 100 _{n according} to the present embodiment includes a plurality of signaling radio bearers handled by RRC. For example, RLC (Radio Link Control) functions include segmentation / concatenation, that is, processing for dividing one packet into multiple TTIs, processing for combining the divided TTIs into packets, reordering processing, and retransmission processing. Is called. As security layer processing, confidentiality processing and integrity protection processing are performed.

  The NAS radio bearer processing unit 110 performs processing of a NAS radio bearer. For example, as the RLC function, segmentation / concatenation, that is, processing for dividing one packet into a plurality of TTIs, processing for combining the divided TTIs into packets, reordering processing, and retransmission processing are performed. As security layer processing, confidentiality processing and integrity protection processing are performed.

  The VoIP radio bearer processing unit 112 performs processing of a VoIP radio bearer. For example, as the RLC function, segmentation / concatenation, that is, processing for dividing one packet into a plurality of TTIs, processing for combining the divided TTIs into packets, reordering processing, and retransmission processing are performed. As security layer processing, confidentiality processing and integrity protection processing are performed. Also, header compression is performed on U-plane bearers.

  A web bearer processing unit 112 for web (Web) performs processing of a radio bearer for web browsing. For example, as the RLC function, segmentation / concatenation, that is, processing for dividing one packet into a plurality of TTIs, processing for combining the divided TTIs into packets, reordering processing, and retransmission processing are performed. As security layer processing, confidentiality processing and integrity protection processing are performed. Also, header compression is performed on U-plane bearers.

  The scheduler 116 performs bearer scheduling. The scheduling mentioned here is performed only when the user apparatus is given a degree of freedom as to which packet of the radio bearer to which the resource block allocated from the base station apparatus 200 is transmitted. For example, the scheduler 116 performs scheduling so that the priority becomes higher in the order of RRC radio bearer, NAS radio bearer, VoIP radio bearer, Web radio bearer, and SON radio bearer. That is, the radio bearer for SON as the signaling radio bearer to which the measurement value is transmitted is lower than the signaling radio bearer handled by RRC other than the signaling radio bearer to which the measurement value is transmitted and the signaling radio bearer for NAS. Priority is assigned. When the base station apparatus 200 performs scheduling for each radio bearer and performs allocation signaling, this may be omitted.

  The multiplexing unit 118 multiplexes radio bearers on the transport channel. For example, the multiplexing unit 110 maps the radio bearer on the transport channel.

  The radio bearer multiplexed on the transport channel is subjected to processing related to the physical layer in the physical layer processing unit 122 and transmitted.

The HARQ processing unit 120 performs retransmission control using HARQ.
Next, the SON radio bearer setting processing method according to the present embodiment will be described with reference to FIG.

Here, if the user apparatus 100 ₁ and 100 ₂ located in the area covered by the base station apparatus 200 _1, to report the measurement report including the reception quality of a reference signal transmitted from the newly-installed base station 200 ₄ will be described, the same applies to the base station apparatus 200 ₁ and 200 _3.

RRC protocol control unit 204 of the base station apparatus 200 ₁ decides to perform SON measurement (step S402). For example, in the case where of a newly-installed base station 200 ₄ is determined to perform the initialization and optimization of the parameters, for example according to an input instruction by the user, it is determined. Further, the present invention can be applied to the case where the problem is improved by resetting the parameter for an existing base station apparatus having a problem in the area.

The RRC protocol control unit 204 generates and transmits an SON SRB setting command for setting the radio bearer for SON for the user apparatuses 100 ₁ and 100 ₂ (step S404, step S408).

  The RRC protocol control unit 204 creates data of the SRB instance for SON, that is, the signaling radio bearer for SON (step S410).

On the other hand, the user apparatuses 100 ₁ and 100 ₂ that have received the SON SRB setting command create data of the SON SRB instance, that is, the SON signaling radio bearer, in the RRC protocol control unit 102 (steps S412 and S414). .

RRC protocol control unit 204 of the base station apparatus 200 ₁ generates the assigned control command measurement command and persistent scheduling includes specific measurement item (step S416), and transmits to the user device 100 ₁ and 100 ₂ ( Step S418, Step S420). The measurement items include, for example, SIR, user apparatus location information, reporting cycle, and the like.

Measurements command and user device 100 ₁ and 100 ₂ receives the allocation control command persistent scheduling measures reception quality of a reference signal transmitted from the _{newly-installed} base station 200 ₄ (step S422, step S424), a SON SRB by reporting to the base station apparatus 200 ₁ as a measurement report in (step S426, step S428).

The base station apparatus 200 ₁ to the reported measurement report is notified for example the access gateway 3000. In this case the base station apparatus 200 ₁ performs predetermined statistical processing may be notified of the results. In addition, when the access gateway device 300 is configured by MME / UPE, it may be notified to the MME / UPE, and when an OAM (Operation And Maintenance) server is provided, the OAM server is notified. You may make it do.

  In the above-described embodiment, a case has been described in which the reception quality of the reference symbol transmitted mainly from the newly installed base station is measured by the user apparatus and the measurement value is reported. However, the measurement target cell is not limited to the new cell. The existing cell may be used. For example, a reference symbol transmitted from an existing base station apparatus, for example, an existing cell to be measured for network optimization (for example, an existing cell having a problem due to poor quality). The reception quality may be measured and the measured value may be reported. By doing in this way, it is possible to reset parameters for an existing base station apparatus having a problem in the area.

  When based on the conventional method, when collecting information on the propagation status of radio waves transmitted from a newly installed base station apparatus and / or an existing base station apparatus, the information on the propagation status of the radio waves is handled by RRC. Therefore, the measurement report reported from the user apparatus to the base station apparatus is transmitted with the highest priority. In RRC, signaling related to communication currently being performed between a base station apparatus and a user apparatus, such as a handover message, is performed. When the handover message is generated after the command related to the SON measurement is generated, the handover message is transmitted with the same priority. Therefore, the handover message is transmitted after the command related to the SON measurement is transmitted. For this reason, a delay occurs in transmission of a handover message that requires urgent.

  Therefore, in this embodiment, a radio bearer handled by RRC is newly provided separately from a normal RRC radio bearer, and a command related to SON measurement is transmitted by the radio bearer. In addition, a measurement report regarding SON measurement is transmitted by the radio bearer. Then, the scheduling priority of the radio bearer is set lower than that of the radio bearer for RRC or NAS. Furthermore, it may be set lower than the U-plane radio bearer. In this way, information for forming a self-organizing network without affecting normal RRC or NAS control, for example, from a newly installed base station device and / or an existing base station device The propagation status (reception quality) of the transmitted radio wave can be acquired.

  In addition, according to the present embodiment, since it is possible to automatically collect the propagation status of radio waves transmitted from a newly installed base station apparatus and / or an existing base station apparatus, initial setting of parameters for the newly installed cell and optimum And resetting parameters for existing base station devices.

  Further, the present invention can be applied to the case where the problem is improved by resetting the parameter for an existing base station apparatus having a problem in the area.

It is explanatory drawing which shows an example of the mobile communication system with which the base station apparatus and user apparatus which concern on one Example of this invention are applied. It is a partial block diagram which shows the base station apparatus which concerns on one Example of this invention. It is a partial block diagram which shows the user apparatus which concerns on one Example of this invention. It is a flowchart which shows the setting method of the radio | wireless bearer for self-organizing networks concerning one Example of this invention.

Explanation of symbols

100, 100 ₁ , 100 ₂ , 100 ₃ , 100 ₄ User device 102 Application interface 104 RRC protocol control unit 106 RRC radio bearer processing unit 108 SON (self-organizing network) radio bearer processing unit 110 NAS radio bearer processing unit 112 VoIP radio bearer processing unit 114 Web radio bearer processing unit 116 scheduler 118 multiplexing unit 120 HARQ processing unit 122 physical layer processing unit (PHY)
200,200 _{1, 200 2,} 200 3, 200 ₄ Base station apparatus 202 network interface 204 RRC protocol controller 206 radio bearer processing radio bearer processing unit 210 for the NAS RRC radio bearer processing unit 208 SON (Self Organizing Customizing Network) Unit 212 VoIP radio bearer processing unit 214 Web radio bearer processing unit 216 Scheduler 218 Multiplexing unit 220 HARQ processing unit 222 Physical layer processing unit (PHY)
250, 250 ₁ , 250 ₂ , 250 ₃ , 250 ₄ cell 300 access gateway (aGW: access gateway)
400 Home Location Register (HLR)
500 core network

Claims (14)

The user equipment residing in an area the base station apparatus covers, the reception quality of a reference symbol transmitted from the periphery of the cell of the base station apparatus is measured, a base station apparatus to report the measured values:
Multiple signaling radio bearers handled by RRC;
RRC protocol control means for notifying the user apparatus of a signaling radio bearer setting command for setting a signaling radio bearer for transmitting the measurement value among the plurality of signaling radio bearers;
A scheduler for scheduling signaling radio bearers according to the priority of each signaling radio bearer;
With
The base station apparatus characterized in that a lower priority is assigned to a signaling radio bearer that transmits the measurement value than a signaling radio bearer handled by RRC other than the signaling radio bearer that transmits the measurement value . In the base station apparatus according to claim 1:
Measurement control command generation means for generating a measurement control command for reporting the measurement value;
With
A base station apparatus, wherein a measurement control command is transmitted by the set signaling radio bearer. In the base station apparatus according to claim 1 :
The base station apparatus, wherein the priority of the set signaling radio bearer is set lower than that of the NAS signaling radio bearer. In the base station apparatus according to any one of claims 1 to 3:
The base station apparatus, wherein a priority of the set signaling radio bearer is set lower than that of a radio bearer for transmitting user data. In the base station apparatus according to any one of claims 1 to 4,
Persistent scheduling is applied to the configured signaling radio bearer,
Radio resource allocation information generating means for generating radio resource allocation information indicating radio resources to be allocated to the set signaling radio bearer;
With
The base station apparatus, wherein the RRC protocol control unit is configured to transmit the radio resource allocation information by any one of a plurality of signaling radio bearers handled by the RRC. A user apparatus that reports a measurement value of a reception quality of a reference symbol transmitted from a cell around the base station apparatus to a base station apparatus that covers an area where the user apparatus is located:
By the base station apparatus, in accordance with the priority of each signaling radio bearer, signaling radio bearer scheduling is performed, the signaling radio bearer the measured value is transmitted, other than signaling radio bearer the measured value is transmitted A lower priority is assigned than a signaling radio bearer handled by RRC, and a signaling radio bearer setting command for setting a signaling radio bearer for reporting the measurement value and a measurement control command for measuring the reception quality are transmitted. And
The user equipment is
Multiple signaling radio bearers handled by RRC;
RRC protocol control means for setting a signaling radio bearer for transmitting the measurement value among the plurality of signaling radio bearers based on the signaling radio bearer setting command;
With
A user apparatus, wherein a measured value measured according to the measurement control command is transmitted by the set signaling radio bearer. The user equipment according to claim 6 :
The user apparatus, wherein the priority of the signaling radio bearer to which the measurement value is transmitted is set lower than that of the NAS signaling radio bearer. In the user device according to claim 6 or 7 ,
A user apparatus, wherein a priority of a signaling radio bearer to which the measurement value is transmitted is set lower than that of a radio bearer for transmitting user data. In the user device according to any one of claims 6 to 8,
Persistent scheduling is applied to the signaling radio bearer on which the measurement value is transmitted,
Wherein the base station apparatus, the radio resource allocation information indicating radio resources before Symbol measurement assigns to signaling radio bearers to be transmitted in the own user apparatus is transmitted,
The RRC protocol control means reports the measurement value according to the radio resource allocation information. The user equipment residing in an area the base station apparatus covers, the self reception quality of a reference symbol transmitted from the peripheral cell of the base station apparatus is measured, the radio bearer in the base station apparatus to report the measured value Setting method:
A scheduling step of scheduling signaling radio bearers according to the priority of each signaling radio bearer;
A signaling radio bearer setting step of setting a signaling radio bearer for transmitting the measurement value among a plurality of signaling radio bearers handled by RRC;
A signaling radio bearer notification step of notifying the user equipment of a signaling radio bearer setting command indicating the setting of the signaling radio bearer;
A measurement value receiving step of receiving the measurement value by the set signaling radio bearer;
I have a,
Wherein the signaling radio bearer for transmitting the measured values, setting the radio bearer, wherein Rukoto low priority is assigned than the signaling radio bearers to be handled by the signaling radio bearers other than the RRC for transmitting the measured values . The radio bearer setting method according to claim 10 :
A measurement control command generating step for generating a measurement control command for reporting the measurement value;
A measurement control command transmission step of transmitting the measurement control command by the set signaling radio bearer;
A method for setting up a radio bearer, comprising: The radio bearer setting method according to claim 10 :
A radio bearer setting method, wherein a priority of a signaling radio bearer to which the measurement value is transmitted is set lower than that of a NAS signaling radio bearer. The radio bearer setting method according to claim 10 :
A radio bearer setting method, wherein a priority of a signaling radio bearer to which the measurement value is transmitted is set lower than that of a radio bearer for transmitting user data. In the radio bearer setting method according to any one of claims 10 to 13 :
A radio resource allocation information generating step for generating radio resource allocation information indicating a radio resource to be allocated to a signaling radio bearer to which the measurement value is transmitted;
A radio resource allocation information transmission step of transmitting the radio resource allocation information by any one of a plurality of signaling radio bearers handled by the RRC;
A method for setting up a radio bearer, comprising:

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