TW201605262A - Device and method - Google Patents

Abstract

To make it possible to suppress interference between discovery reference signals (DRS). Provided is a device that is equipped with: an acquisition unit that acquires information relating to a plurality of groups of small cells; and a control unit that, for each of the plurality of groups, allocates a different wireless resource or a different code for the purpose of transmitting discovery reference signals.

Description

Device and method

The disclosure relates to apparatus and methods.

In a cellular network system according to communication specifications such as LTE (Long Term Evolution), for cell selection/cell reselection and taking over, the terminal device performs measurement based on the reference signal. . For example, the measurement performed on the frequency band not used by the terminal device is referred to as Inter-Frequency Measurement and is performed within the measurement gap.

A variety of techniques have been proposed for the measurement of the terminal device. For example, Patent Document 1 discloses a technique of allocating a measurement gap to a larger number of component carriers as the channel quality is lower.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2014-53971

In order to suppress interference between small honeycomb networks, it is being studied to adaptively switch the on/off state of the small honeycomb network. Moreover, in order to suppress the delay of the data transmission and reception caused by the switching of the on/off state of the small cellular network, the base station of the small-sized cellular network in the closed state transmits the Discovery Reference Signal (DRS). Things are being discussed.

However, for example, in the case where the small honeycomb network is configured in a high-density configuration, it is assumed that interference between DRSs may occur. For example, when a method of shifting in the same frequency direction as the CRS to suppress interference between DRSs is employed, the reuse factor is 6. Therefore, if the small honeycomb network exceeding 6 is located in the vicinity of the terminal device, the DRS of the different small honeycomb networks may interfere with each other in the terminal device.

Thus, it is highly desirable to provide a mechanism that can suppress interference between discovery reference signals (DRS).

According to the disclosure, there is provided an apparatus comprising: an acquisition unit that acquires information on a plurality of groups of small honeycomb networks; and a control unit that assigns a search reference signal to each of the plurality of complex groups Different wireless resources or different codes required for the message.

According to the disclosure, there may be provided a method comprising the steps of: obtaining information about a plurality of groups of small honeycomb networks; and borrowing The processor allocates, for each of the above complex groups, the steps of exploring different radio resources or different codes required for the transmission of the reference signal.

According to the disclosure, a device can be provided having: The acquisition unit obtains information indicating that the wireless resource or code required for the transmission of the reference signal is allocated to each of the plurality of small groups of the small honeycomb network; and the control unit is to record the wireless resource or the above The code is notified to the terminal device. The above-mentioned radio resource or code that has been assigned to each of the above-mentioned plural groups is different from the radio resource or code that has been assigned to other groups among the above-mentioned plural group.

According to the disclosure, a method can be provided, including Yes: obtaining the steps of: searching for the radio resource or code required for the transmission of the reference signal by each of the plural groups of the small cellular network; and recording the radio resource by the processor Or the step of notifying the terminal device to the code. The above-mentioned radio resource or code that has been assigned to each of the above-mentioned plural groups is different from the radio resource or code that has been assigned to other groups among the above-mentioned plural group.

According to the disclosure, a device can be provided having: The acquisition unit obtains information indicating that the radio resource or code required for the transmission of the reference signal is allocated to each of the plurality of small groups of the small honeycomb network; and the measurement unit is for the above-mentioned plural group Each of the measurements is based on a small reference hive network contained in the group based on the discovery reference signal transmitted using the radio resource or code that has been assigned to the group. The above-mentioned wireless resource or the upper code that has been assigned to each of the above-mentioned plural groups, and the wireless that has been assigned to other groups among the above-mentioned plural group The resource or code is different.

Moreover, according to the disclosure, a method can be provided. Included: a step of obtaining information indicating a radio resource or a code required for transmission of a reference signal by each of a plurality of small groups of small honeycomb networks; and a multi-group for the above by a processor Each of these performs a step of determining the small honeycomb network contained in the group based on the discovery reference signal transmitted using the wireless resource or code that has been assigned to the group. The above-mentioned radio resource or code that has been assigned to each of the above-mentioned plural groups is different from the radio resource or code that has been assigned to other groups among the above-mentioned plural group.

As described above, according to the present disclosure, interference between the search reference signals (DRS) can be suppressed. In addition, the effect of the above is not necessarily limited to the explanation, and may be combined with the effect of the above, or the effect of the above, to achieve any of the effects to be disclosed in the present specification, or other effects that can be grasped according to the present specification.

1‧‧‧Communication system

11‧‧‧Giant base station

13‧‧‧Gathering Honeycomb Net

15‧‧‧Small base station

17‧‧‧Small hive network

19‧‧‧ Small Beehive Network Cluster

30‧‧‧Child frame

50A~50F‧‧‧ Pairing

100‧‧‧Control entity

110‧‧‧Communication Department

120‧‧‧Memory Department

130‧‧‧Processing Department

131‧‧‧Groups

133‧‧‧Information Acquisition Department

135‧‧‧Control Department

200‧‧‧Base Station

210‧‧‧Antenna Department

220‧‧‧Wireless Communications Department

230‧‧‧Network Communication Department

240‧‧‧Memory Department

250‧‧‧Processing Department

251‧‧‧Information Acquisition Department

253‧‧‧Control Department

300‧‧‧ Terminal devices

310‧‧‧Antenna Department

320‧‧‧Wireless Communications Department

330‧‧‧Memory Department

340‧‧‧Processing Department

341‧‧‧Information Acquisition Department

343‧‧‧Determination Department

345‧‧‧Reporting Department

700‧‧‧Server

701‧‧‧ processor

702‧‧‧ memory

703‧‧‧ storage

704‧‧‧Network interface

705‧‧‧Wired communication network

706‧‧‧ Busbar

800‧‧‧eNB

810‧‧‧Antenna

820‧‧‧Base station installation

821‧‧‧ controller

822‧‧‧ memory

823‧‧‧Network interface

824‧‧‧ core network

825‧‧‧Wireless communication interface

826‧‧‧BB processor

827‧‧‧RF circuit

830‧‧‧eNodeB

840‧‧‧Antenna

850‧‧‧Base station installation

851‧‧ ‧ controller

852‧‧‧ memory

853‧‧‧Internet interface

854‧‧‧core network

855‧‧‧Wireless communication interface

856‧‧‧BB processor

857‧‧‧Connection interface

860‧‧‧RRH

861‧‧‧Connection interface

863‧‧‧Wireless communication interface

864‧‧‧RF circuit

900‧‧‧Smart Phone

901‧‧‧ processor

902‧‧‧ memory

903‧‧‧ storage

904‧‧‧ External connection interface

906‧‧‧ camera

907‧‧‧ sensor

908‧‧‧ microphone

909‧‧‧Input device

910‧‧‧ display device

911‧‧‧ Speaker

912‧‧‧Wireless communication interface

913‧‧‧BB processor

914‧‧‧RF circuit

915‧‧‧Antenna switch

916‧‧‧Antenna

917‧‧ ‧ busbar

918‧‧‧Battery

919‧‧‧Auxiliary controller

920‧‧‧Driving navigation device

921‧‧‧ processor

922‧‧‧ memory

924‧‧‧GPS module

925‧‧‧ sensor

926‧‧‧Information interface

927‧‧‧Content Player

928‧‧‧Memory Media Interface

929‧‧‧ input device

930‧‧‧ display device

931‧‧‧Speakers

933‧‧‧Wireless communication interface

934‧‧‧BB processor

935‧‧‧RF circuit

936‧‧‧Antenna switch

937‧‧‧Antenna

938‧‧‧Battery

940‧‧‧In-vehicle system

941‧‧‧Car network

942‧‧‧Vehicle side module

[Fig. 1] An explanatory diagram for explaining an example of a small honeycomb network.

[Fig. 2] An explanatory diagram for explaining an example of a small honeycomb network cluster.

Fig. 3 is a flowchart showing an example of a schematic flow of an opening/closing process of a small honeycomb net.

[Fig. 4] A flowchart showing an example of a schematic flow of the opening/closing process of the small honeycomb network when the DRS is used.

FIG. 5 is an explanatory diagram for explaining an example of measuring a gap.

FIG. 6 is an explanatory diagram for explaining a first scenario of carrier aggregation (CA).

FIG. 7 is an explanatory diagram for explaining a second scenario of carrier aggregation (CA).

FIG. 8 is an explanatory diagram for explaining a third scenario of carrier aggregation (CA).

[Fig. 9] An explanatory diagram for explaining an example of a technique required for suppressing interference between CRSs.

Fig. 10 is an explanatory diagram showing an example of a schematic configuration of a communication system according to an embodiment of the present disclosure.

Fig. 11 is a block diagram showing an example of a configuration of a control entity according to the embodiment.

FIG. 12 is an explanatory diagram for explaining an example of a plurality of groups in which a small honeycomb network is divided.

FIG. 13 is an explanatory diagram for explaining an example of a subframe to which each of the plural groups is allocated.

FIG. 14 is an explanatory diagram for explaining an example of resource blocks to which each of the plural groups is allocated.

Fig. 15 is a block diagram showing an example of a configuration of a base station according to the embodiment.

[Fig. 16] An example of a configuration of a terminal device according to the embodiment Block diagram.

Fig. 17 is a flowchart showing an example of a schematic flow of processing in the same embodiment.

Fig. 18 is a block diagram showing an example of a schematic configuration of a server.

FIG. 19 is a block diagram of a first example of a schematic configuration of an eNB. FIG.

FIG. 20 is a block diagram of a second example of a schematic configuration of an eNB. FIG.

Fig. 21 is a block diagram showing an example of a schematic configuration of a smartphone.

Fig. 22 is a block diagram showing an example of a schematic configuration of a driving navigation device.

Hereinafter, a preferred embodiment of the present disclosure will be described in detail with reference to the accompanying drawings. In the present specification and the drawings, the components that have substantially the same functional configuration are denoted by the same reference numerals, and the description thereof will not be repeated.

In addition, the explanation is performed in the following order.

1. Introduction

1.1. Related technology

1.2. Related topics of measurement

2. The schematic structure of the communication system

3. Composition of each device

3.1. Composition of the control entity

3.2. Composition of the base station

3.3. Composition of terminal devices

4. Process flow

5. Application examples

5.1. Application examples for controlling entities

5.2. Application examples of base stations

5.3. Application examples of terminal devices

6. Summary

<<1. Introduction>>

First, the technology related to the embodiments of the present disclosure and the problems related to the embodiments of the present disclosure will be described with reference to FIGS. 1 to 9.

<1.1. Related Technology>

A technique related to the embodiment of the present disclosure will be described with reference to Figs. 1 to 8 . Specifically, a small honeycomb network, measurement, and carrier aggregation are described.

(small hive network) (a) Small hive network

The small honeycomb network is a small honeycomb network smaller than the giant honeycomb network. For example, a small honeycomb network overlaps with a portion or the entirety of a macro honeycomb network. An example of a small honeycomb network will be described below with reference to Fig. 1 .

Fig. 1 is an explanatory diagram for explaining an example of a small honeycomb network. Referring to Fig. 1, a macro base station 11, a macro honeycomb network 13, a small base station 15, and a small honeycomb network 17 are illustrated. The macro base station 11 is a base station of the macro honeycomb network 13, and the small base station 15 is a small honeycomb network. 17 base station. In other words, the macro honeycomb network 13 is a coverage area (i.e., a communication area) of the macro base station 11, and the small honeycomb network 17 is a coverage area (i.e., a communication area) of the small base station 15.

In addition, the base station of LTE is called eNB. (evolved Node B). Here, the LTE macro base station is referred to as a macro eNB, and the LTE small base station is referred to as a small eNB. Further, the terminal device of LTE is called UE (User Equipment).

(b) Small honeycomb network clusters

The small honeycomb network, which is densely packed, forms a small honeycomb network cluster. An example of a small honeycomb network cluster will be described below with reference to FIG.

Figure 2 is a diagram illustrating an example of a small honeycomb network cluster. Ming map. Referring to Fig. 2, a macro base station 11, a macro honeycomb network 13, and a small honeycomb network 17 are illustrated. For example, a small honeycomb network 17 that is configured at a high density forms a small honeycomb network cluster 19.

(c) Small cell on/off of small honeycomb network (Small cell On/Off)

In the case where the small honeycomb network is configured in a high density, the interference between the cellular networks is a big problem. Usually, a small base station transmits a Cell-specific Reference Signal (CRS) regardless of whether there is a flow of the small cellular network. In the case where the small honeycomb network is highly densely configured, it should be known that the CRS would be a big disturbance to the neighboring cell. Therefore, in order to reduce the various technologies required for interference, it has been discussed.

As a technique for reducing such inter-cell interference, the technology of opening/closing a small honeycomb network is currently attracting attention. The technology of opening/closing the small honeycomb network can suppress the interference of the small honeycomb network to the surrounding honeycomb network by adaptively switching the on/off state of the small honeycomb network. Although the triggering of the switching of the ON/OFF state of the small honeycomb network has not been specifically determined, for example, it is being investigated as a trigger for switching based on the flow rate, the connection of the terminal device, or the arrival of the packet. An example of a procedure for turning on/off the small honeycomb network will be described below with reference to FIG.

Fig. 3 is a flowchart showing an example of a schematic flow of the opening/closing process of the small honeycomb net. The opening/closing processing of the small-sized cellular network is the processing disclosed in R1-134318 of 3GPP (Third Generation Partnership Project). The UE sends a uplink signal (S1001) to the macro eNB serving the serving cell, that is, the macro hive network, once the data to be sent occurs. In this way, the macro eNB searches for a small eNB that is in a closed state around the UE, and if there is a suitable small eNB, the small eNB that is appropriate is instructed to switch to the on state (S1003). In this way, the small eNB is switched from the off state to the on state (S1005). Then, the small eNB transmits a lower chain signal such as a PSS (Primary Synchronization Signal), an SSS (Secondary Synchronization Signal), a CRS (Cell-specific Reference Signal), and a PBCH (Physical Broadcast Channel) signal (S1007). In addition, the above-mentioned UE is performing hive network search and RRM measurement (S1009), and upward. The macro eNB performs a measurement report (S1011). Thereafter, the takeover of the UE from the macro hive network to the small hive network is performed (S1013). Then, the above-mentioned UE and the above-mentioned small eNB perform an access procedure (S1015) to perform data transmission (S1017).

With the program shown in Figure 3, the small hive network is turned on / Switching off the status is possible. However, according to this procedure, the transition time becomes longer. That is, according to the program, the time from when the terminal device wants to transmit data to when the terminal device actually transmits the data becomes longer. Therefore, it is difficult to improve the throughput rate. In order to improve the migration time, it is preferable that the measurement process mainly causing the delay is performed by the terminal device while the small honeycomb network is in the off state.

(d) Exploring reference signals

In order to reduce migration time, the introduction of Discovery Reference Signal (DRS) is being discussed. The DRS makes it possible to measure the small honeycomb network in a closed state. DRS, also known as Discovery Signal (DS). A small base station (for example, a small eNB) transmits a DRS while a small cellular network (or a small base station) is in a closed state, and a terminal device (for example, a UE) performs measurement based on the DRS. An example of a procedure for turning on/off the small honeycomb network when the DRS is used will be described below with reference to FIG.

Fig. 4 is a flowchart showing an example of a schematic flow of the opening/closing process of the small honeycomb network when the DRS is used. The on/off processing of the small cellular network is the processing disclosed in R1-334318 of 3GPP. The macro eNB instructs the small eNB to transmit the DS (S1031), and the small eNB transmits the DS in the downlink (S1033). The UE performs measurement based on the DS (S1035), and reports the result of the above measurement to the macro eNB (that is, the eNB serving the cellular network, that is, the macro hive network) (S1037). After the subsequent procedures (S1041 to S1049), the above-mentioned UE and the above-mentioned small eNB perform data transmission (S1051).

By the procedure shown in Fig. 4, the terminal device can perform measurement while the small honeycomb network is in the off state. Therefore, the migration time is deleted and the throughput rate is improved.

In addition, as various technologies required to reduce interference, there are Muting, Multiple Instance, and Interference Cancellation, and the enhancement of the transmitting side and the receiving side is also being Be studied.

(measurement) (a) Determination of CRS

In LTE, the terminal device performs measurement based on the CRS transmitted by the base station. Specifically, the terminal device performs the measurement of the quality of the propagation path between the base station and the terminal device by the reception of the CRS transmitted by the base station. This measurement is called RRM (Radio Resource Management) measurement, or simply "determination". (measurements)".

The result of the above measurement is used to select the terminal. The honeycomb network required for the device. Specifically, for example, the result of the above measurement is used for cell selection/cell reselection by a terminal device of RRC (Radio Resource Control) idle (RRC Idle). Further, for example, the result of the above measurement is reported by the RRC Connected terminal device to the base station, and is used for the handover decision by the base station.

(b) RSRP and RSRQ

In LTE, the measurement of CRS is measurement of RSRP (Reference Signal Received Power) and/or RSRQ (Reference Signal Received Quality). In other words, the terminal device obtains RSRP and/or RSRQ as a result of the measurement of the CRS. RSRQ is calculated from RSRP and RSSI (Received Signal Strength Indicator).

RSRP, which is the reception of CRS for each single resource element power. That is, RSRP is the average of the received power of the CRS. The receiving power of the CRS is obtained by detecting the correlation between the received signal in the resource element of the CRS and the known signal, that is, the CRS. RSRP corresponds to the desired signal "S(Signal)".

RSSI, for each OFDMA (Orthogonal Frequency) Division Multiple Access) The total power of the signal of the symbol. therefore, The RSSI contains the desired signals, interference signals and noise. That is, the RSSI system corresponds to "S(Signal) + I(Interference) + N (Noise)".

The RSRQ is RSRP/(RSRI/N). N series is RSSI The number of resource blocks used in the calculation. The resource block is a resource block arranged in the frequency direction. Therefore, the RSRQ is a value obtained by dividing the RSRP by the RSRI of each resource block. That is, the RSRQ corresponds to the SINR (Signal-to-Interference-plus-Noise Ratio).

As described above, by measuring the CRS, it is available Received power (also known as RSRP), and received quality like SINR (also known as RSRQ).

(c) Measuring timing

The measurement of the frequency band that the terminal device is using is called Intra-Frequency Measurement. On the other hand, the measurement of the frequency band not used by the terminal device is called Inter-Frequency Measurement.

Terminal device, no RF (Radio) Frequency) The switching of the frequency of the circuit allows the CRS transmitted in the frequency band being used to be received. That is, there is no need to switch the frequency of the RF circuit for Intra-Frequency Measurement.

On the other hand, the terminal device is for the frequency that will not be used. The CRS transmitted in the band is received, and the frequency of the RF (Radio Frequency) circuit must be switched. That is, for Inter-Frequency Measurement, the switching of the frequency of the RF circuit is necessary. Therefore, for the Inter-Frequency Measurement, a period called a measurement gap is employed.

During the measurement of the gap, the base station does not send to the terminal device. Send the chain signal. Further, the measurement gap is shared between the base station and the terminal device. For example, the base station will send a message (eg, an RRC Connection Reconfiguration message) indicating information about the measurement gap to the terminal device. For example, the measurement gap is represented by a measurement gap length (Measurement Gap Length: MGL), a measurement gap repeat period (MGRP), a gap offset, and the like. Further, the combination of MGL and MGRP is determined, for example, as a gap mode. An example of measuring the gap will be described below with reference to Fig. 5 .

Fig. 5 is an explanatory diagram for explaining an example of measuring a gap. Referring to FIG. 5, a row of a radio frame having a SFN of 0 to 9 and a row of 10 subframes (a subframe having a subframe number of 0 to 9) included in the radio frame are included. The matrix is shown. In this example, the MGL is 6 milliseconds (ms), the MGRP is 40 ms, and the gap bias is zero. Therefore, the measurement gap has a length of 6 ms and appears once every 40 ms. More specifically, for example, among each of the radio frames having SFNs of 0, 4, and 8, the six sub-frames having the sub-frame numbers of 0 to 5 are measurement gaps. During the measurement gap, Inter-Frequency Measurement is performed.

(d) Measurement report

The terminal device reports the result of the measurement to the base station. This reporting is called measurement reporting.

Measurement report, periodic report ) or event-triggered reporting. Periodic reports are reports that are made during the set period. On the other hand, an event-triggered report is a report that is made when a reporting event occurs. Reporting events A1~A5 are events related to the takeover in the system, and reporting events B1~B2 are events related to the takeover between the systems.

(carrier aggregation)

Carrier Aggregation (CA) is a technique in which a composite component carrier (CC) is used for communication. The component carrier is a frequency band having a bandwidth of up to 20 MHz. There are three scenarios in carrier aggregation. Hereinafter, three scenarios of carrier aggregation will be described with reference to FIGS. 6 to 8.

Figure 6 to Figure 8 are used to illustrate the 1st of carrier aggregation (CA). An illustration of the third situation. Referring to Fig. 6, in the first scenario (Intra-Band contiguous) of CA, the terminal device uses adjacent CCs in the same operating band. Referring to Fig. 7, in the second scenario (Intra-Band non-contiguous) of CA, the terminal device uses CCs that are not adjacent in the same operating band. Referring to Fig. 8, in the third scenario (Inter-Band non-contiguous) of CA, the terminal device uses non-adjacent CCs in different operating bands.

<1.2. Related topics of measurement>

As described above, in order to suppress interference between small honeycomb networks, it is being studied to adaptively switch the on/off state of the small honeycomb network. Further, in order to suppress the delay of data transmission and reception caused by the switching of the on/off state of the small cellular network, the transmission of the DRS by the base station of the small honeycomb network in the closed state is being investigated.

However, for example, the small honeycomb network is highly densely configured. In the case of the case, it is assumed that interference between DRS will occur. For example, when a method of shifting in the same frequency direction as the CRS to suppress interference between DRSs is employed, the reuse factor is 6. Therefore, if the small honeycomb network exceeding 6 is located in the vicinity of the terminal device, the DRS of the different small honeycomb networks may interfere with each other in the terminal device. The method required to suppress interference between CRSs will be described below with reference to FIG.

Figure 9 is used to illustrate the interference required to suppress interference between CRSs. An illustration of an example of a technique. Referring to Figure 9, there is illustrated a sub-frame Two resource blocks arranged in the frequency direction in 30. As shown in FIG. 9, for example, for six cellular networks (Hive Network 0 to Honeycomb Network 5), different resource elements required for transmitting CRS are allocated. Thereby, interference between CRSs of different cellular networks is suppressed. However, according to this method, if the cellular network exceeding 6 is located in the vicinity of the terminal device, the CRSs of different small cellular networks may interfere with each other in the terminal device.

Although the example shown in Figure 9 is an example of CRS, Figure 9 The technique shown is for DRS, and the same is true for DRS. That is, if the small honeycomb network exceeding 6 is located in the vicinity of the terminal device, the DRSs of different small honeycomb networks may interfere with each other in the terminal device.

Thus, it is highly desirable to provide a mechanism that can suppress interference between discovery reference signals (DRS).

<<2. Summary of communication system>>

Next, a schematic configuration of the communication system 1 according to the embodiment of the present disclosure will be described with reference to Fig. 10 . Fig. 10 is an explanatory diagram showing an example of a schematic configuration of a communication system 1 according to the embodiment of the present disclosure. Referring to Fig. 10, communication system 1 includes control entity 100, base station 200, and terminal device 300. The communication system 1 is a system based on, for example, LTE, LTE-Advanced, or communication specifications conforming to these specifications.

The base station 200 performs wireless communication with one or more terminal devices including the terminal device 300. The base station 200 can be a base station of a macro hive network (that is, a macro base station), or a small hive network. Base station (also known as a small base station).

The terminal device 300 is wirelessly connected to the base station 200. News. Further, the terminal device 300 performs measurement on the honeycomb network in the vicinity of the terminal device 300. Further, the terminal device 300 reports the result of the measurement to the base station 200.

Especially in the embodiment of the disclosure, the control entity 100. For each of the plural groups of the small cellular network, different radio resources required for the transmission of the reference reference signal (DRS) are allocated. Thereby, for example, interference between DRSs is suppressed. In addition, the control entity 100 is, for example, an existing or newly added core network node. Alternatively, the control entity 100 can also be a base station. As an example, if the base station 200 is a small base station, the control entity 100 may also be a macro base station.

<<3. Composition of each device>>

Next, the configuration of the control entity 100, the base station 200, and the terminal device 300 described in the embodiment of the present disclosure will be described with reference to Figs. 11 to 16 .

<3.1. Composition of Control Entities>

First, an example of the configuration of the control entity 100 described in the embodiment of the present disclosure will be described with reference to Figs. 11 to 14 . Fig. 11 is a block diagram showing an example of the configuration of the control entity 100 according to the embodiment of the present disclosure. Referring to Fig. 11, control entity 100 includes communication unit 110, storage unit 120, and processing unit 130.

(Communication Department 110)

The communication unit 110 communicates with other nodes. For example, the communication unit 110 communicates with the core network node and the base station. For example, the communication unit 110 communicates with the base station 200.

(memory unit 120)

The memory unit 120 temporarily or permanently memorizes the programs and materials required to control the actions of the entity 100.

(Processing unit 130)

The processing unit 130 provides various functions of the control entity 100. The processing unit 130 includes a grouping unit 131, an information acquisition unit 133, and a control unit 135. Further, the processing unit 130 may further include other components than these components. In other words, the processing unit 130 can perform operations other than the operations of these components.

(Grouping unit 131)

The grouping unit 131 divides the small honeycomb network into plural groups. Thereby, for example, the trouble of the operator of the honeycomb network system can be reduced.

(a) Small hive network

For example, the small honeycomb network mentioned above is a small honeycomb network contained in a small honeycomb network. That is, the grouping unit 131 is a small honeycomb network. The small honeycomb network contained in the group is divided into plural groups. The small honeycomb network cluster is, for example, a small honeycomb network that is configured in a high density.

(b) Number of groups (b-1) Calculate

For example, the grouping unit 131 calculates the number of groups (that is, the number of groups included in the plural group).

Specifically, for example, the grouping unit 131 calculates the number of the above-mentioned groups by calculating the number of radio resources or the number of codes for each group so as to be a predetermined amount or more.

- wireless resources

For example, assigning different radio resources to each of the above complex groups. In this case, for example, the grouping unit 131 calculates the number of the above-mentioned group based on the total amount of radio resources allocated to the complex group and the amount of radio resources necessary for each group. For example, if the total amount of radio resources allocated to the above complex group is M, and the amount of radio resources necessary for each group is N, the number of groups X is calculated as follows.

--The first case

As a first example, the different radio resources are recorded at different times. Wireless resources (such as different sub-frames). Further, for example, measurement for all groups is performed using the same measurement gap. In this case, for example, the total amount (M) of radio resources is the time included in the measurement gap, and the amount (N) of radio resources necessary for each group is the time necessary for measurement based on DRS.

As a specific example, the time (M) contained in the gap is measured. For 6 milliseconds, the time (N) required for the DRS based measurement is 2 milliseconds. In this case, the number of groups (X) is 3.

--The second case

As a second example, different radio resources are recorded as radio resources of different frequencies. In this case, for example, the total amount (M) of radio resources is the bandwidth of the entire band (for example, component carrier) (for example, the number of all resource blocks arranged in the frequency direction), and the radio necessary for each group The amount of resources (N) is a bandwidth (e.g., the number of resource blocks arranged in the frequency direction) necessary for measurement based on DRS.

As a specific example, the bandwidth (M) of the entire band is At 20 MHz (100 resource blocks), the time (N) necessary for the measurement based on DRS is 5 MHz (25 resource blocks). In this case, the number of groups (X) is 4.

--The third case

As a third example, it is noted that at least one of time and frequency is a different radio resource. In this case, the total amount of wireless resources The quantity (M) is the total amount of radio resources that are spread in the time direction and the frequency direction (for example, the total number of resource blocks that are spread in the time direction and the frequency direction, and the amount of radio resources necessary for each group (N) It is a radio resource (such as the number of resource blocks) necessary for DRS-based measurements.

In addition, if the interference in the group is sufficiently reduced by grouping In the low case, the amount of radio resources (N) necessary for each group can also be said to be the amount of radio resources necessary for each small cellular network.

-code

For example, each of the above complex groups is assigned a different code (eg, a different orthogonal code). In this case, for example, the grouping unit 131 calculates the total number of codes (for example, orthogonal codes) that can be used for multiplexing as the number of groups to be recorded.

As a specific example, if the total number of codes that can be used for multiplexing is 20, the number of groups above is also 20.

- Combination of wireless resources and codes

For each of the above complex groups, a combination of wireless resources and codes can also be assigned. More specifically, each of the above complex groups may be assigned a different combination (ie, at least one of the wireless resources and the code is a different combination). In this case, for example, the grouping unit 131 may also use the product of the number of groups in which only the wireless resource is allocated as described above and the group number of the case in which only the code is assigned as the above, as the number of groups to be counted. Calculated.

(b-2) the number specified

In addition, the number of groups (that is, the number of groups included in the plural group) may also be a fixed number. For example, the memory unit 120 may store the number of groups of the predetermined number, and the grouping unit 131 may acquire the number of the group.

(c) The method of grouping (c-1) Location-based approach

For example, the grouping unit 131 divides the small-sized honeycomb network into the above-mentioned plural group based on the position of the small honeycomb network. More specifically, for example, the grouping unit 131 divides the small-sized honeycomb network into the above-mentioned plural group so that the distance between the small honeycomb networks in the group becomes large. Thereby, for example, interference within the group can be suppressed.

As a first example, the grouping unit 131 divides the above-mentioned small honeycomb network into a plurality of complex plural groups so that the total distance between the small honeycomb networks in the group becomes large. More specifically, for example, the grouping unit 131 divides the upper small honeycomb network into the upper complex group so that the average (or sum) of the upper sums in the upper complex group is maximized. Thereby, for example, the distance between the small honeycomb nets contained in the group can be made larger.

In the second example, the grouping unit 131 divides the small-sized honeycomb network into the above-mentioned plural group so that the distance between any two small honeycomb networks in the group becomes equal to or greater than a predetermined distance. Thereby, the lower limit of the distance between the small honeycomb networks contained in the group is guaranteed.

(c-2) Techniques based on interference information

The grouping unit 131 may classify the small-sized honeycomb network into the above-mentioned plural group based on the information on the interference between the small honeycomb networks. More specifically, for example, the grouping unit 131 may be configured such that the small honeycomb network is divided into the above-mentioned plural group. Thereby, for example, interference within the group can be more reliably suppressed.

For example, the control entity 100 can also collect and represent the small Information on the amount of interference between the types of honeycomb networks is stored in the memory unit 120. Then, the grouping unit 131 may classify the small-sized honeycomb network into the upper complex group based on the above-mentioned interference amount.

As an example, the grouping unit 131 may also be within the group. The sum of the interference amounts between the small honeycomb networks becomes smaller, and the small honeycomb network is divided into the above complex group. More specifically, for example, the grouping unit 131 may classify the upper small-sized honeycomb network into the upper complex group in such a manner that the average (or sum) of the upper sums in the above-mentioned plural group is minimized. Thereby, for example, the amount of interference between the small honeycomb networks contained in the group can be made small.

As a second example, the grouping unit 131 is such that it is within the group. The amount of interference between any two small honeycomb networks becomes the following method, and the small honeycomb network is divided into the above complex group. Thereby, the upper limit of interference between the small honeycomb networks contained in the group is guaranteed.

(d) Specific examples of grouping

Figure 12 is a diagram for explaining the plural group into which the small honeycomb network is divided. An illustration of the example. Referring to Figure 12, a small honeycomb network cluster containing nine small honeycomb webs 40 (i.e., small honeycomb webs 40A-40I) is illustrated. In this example, the number of groups is 3, and the 9 small honeycomb networks 40 are divided into 3 groups (ie, group A, group B, and group C). The small honeycomb networks belonging to such different groups exist close to each other, but the small honeycomb network belonging to the same group exists far away to some extent.

(Information acquisition unit 133)

The information acquisition unit 133 acquires information on a plurality of groups of small honeycomb networks.

(a) Specific methods

For example, as described above, the grouping unit 131 divides the above-described small honeycomb network into the above-mentioned plural group. Then, the memory unit 120 stores information about the plural group. At any subsequent timing, the information acquisition unit 133 acquires information about the plural group.

(b) Group

For example, each of the above-mentioned plural groups includes one or more small honeycomb networks in the same small honeycomb network cluster. Thereby, for example, interference of DRS in a small honeycomb cluster can be suppressed.

For example, each of the above-mentioned plural groups contains a small honeycomb network that is difficult to interfere with each other. Specifically, for example, each of the above-mentioned plural groups contains a small honeycomb network that is distant from each other. By way of example For example, interference within a group can be suppressed.

(c) Information about plural groups

As an example, the above-mentioned information of the above-mentioned plural group includes: group identification information required to identify each of the above-mentioned plural groups.

As another example, the above information about the plural group includes information indicating the number of groups (that is, the number of groups included in the plural group).

In addition, the above information about the above plural group may also contain other information about the above plural group.

(Control unit 135) (a) Distribution

The control unit 135 allocates different radio resources or different codes required for the transmission of the search reference signal (DRS) to each of the above complex group. Thereby, for example, interference between DRSs can be suppressed. More specifically, for example, interference between DRSs of small-sized cellular networks belonging to different groups can be suppressed. In addition, the DRS is a reference signal transmitted by a base station of a small cellular network in a closed state (and an open state). DRS, also known as Discovery Signal (DR).

(a-1) Distribution of wireless resources

For example, the control unit 135 allocates different radio resources to each of the above-mentioned plural groups. Thereby, for example, the terminal device 300 can be The measurement can be performed without complicated processing such as decoding.

- Wireless resources at different times

As a first example, different radio resources are recorded as radio resources at different times. That is, the control unit 135 allocates radio resources of different times required for transmission of the DRS to each of the above-mentioned plural groups.

For example, the different radio resources are recorded as radio resources of different subframes. That is, the control unit 135 allocates different sub-frames required for transmission of the DRS to each of the above-mentioned plural groups. Hereinafter, a specific example will be described with reference to Fig. 13 .

Fig. 13 is an explanatory diagram for explaining an example of a subframe to which each of the plural groups is allocated. Referring to Fig. 13, for example, six sub-frames (i.e., sub-frames with subframe numbers #0 to #5) are illustrated. In this example, the sub-frames with subframe numbers #0 and #1 are assigned to group A, and the sub-frames with subframe numbers #2 and #3 are assigned to group B, sub-frames. The sub-frames with frame numbers #4 and #5 are assigned to group C.

Thereby, for example, it is possible to perform measurement for each group using the entire frequency band.

- Radio resources of different frequencies

As a second example, different radio resources are recorded as radio resources of different frequencies. That is, the control unit 135 allocates radio resources of different frequencies required for transmission of the DRS to each of the above-mentioned plural groups.

For example, the above different wireless resources are the same component. Radio resources of different frequencies within a carrier (CC). Moreover, for example, the different radio resources are recorded as radio resources of different frequencies in the same subframe. That is, the different radio resources are recorded as different radio resources in the same CC and the same sub-frame.

For example, remember different wireless resources for different frequencies. Resource block. That is, the control unit 135 allocates resource blocks of different frequencies required for transmission of the DRS to each of the above-mentioned plural groups. Hereinafter, a specific example will be described with reference to Fig. 14 .

Figure 14 is a diagram for explaining that each of the plural groups is assigned An illustration of an example of a resource block. Referring to Fig. 14, for example, pairs 50A to 50F of resource blocks arranged in the frequency direction are illustrated. Each pairing 50 series contains two resource blocks spanning the sub-frame 30. In this example, pair 50A and 50B are assigned to group A, pair 50C and 50D are assigned to group B, and pair 50E and 50F are assigned to group C.

Thereby, for example, it is possible to perform measurement for each group at a specific time instead of at a specific time.

- Wireless resources at different times/frequency

As a third example, the different resource blocks may be different radio resources at different times or frequencies (that is, at least one of time and frequency is a different radio resource). That is, the control unit 135 may allocate radio resources of different times or different frequencies required for transmission of the DRS to each of the above complex groups.

For example, different wireless resources can be different. Resource blocks of time or different frequencies (ie, at least one of time and frequency is a different resource block). That is, the control unit 135 may allocate different resource blocks required for the DRS transmission to each of the above complex groups.

For example, as described above, the control unit 135 is a pair of complex groups Each of the groups is assigned a different wireless resource. Further, the control unit 135 assigns, for example, wireless resources equally to each of the above-mentioned plural groups. For example, if the same amount of radio resources are allocated to each of the above complex groups, if there is any remaining radio resource, the remaining ones can be allocated to any one or more groups.

(a-2) Code allocation

For example, the control unit 135 assigns a different code to each of the above-mentioned plural groups. The different codes are the codes required for multiplexing. Specifically, for example, the different codes are orthogonal codes or Zadoff-Chu Sequences (think of them, and different codes are not limited to these codes). Thereby, for example, the same radio resource can be used to transmit DRSs of different groups. That is, the utilization efficiency of wireless resources can be improved.

In addition, if the different code above is an orthogonal code, use positive The CSI-RS (Channel State Information Reference Signal) transmitted by the code can also be used as a DRS.

(a-3) Distribution of combinations of wireless resources and codes

For example, the control unit 135 may assign a combination of the radio resources and codes required for the DRS to each of the above-mentioned plural groups. More specifically, the control unit 135 may assign a different combination to each of the above-mentioned plural groups (that is, at least one of a wireless resource and a code is a different combination).

For example, the above combination can also be a group of resource blocks and codes. Hehe. In this case, the control unit 135 may assign a different combination to each of the above complex groups (that is, at least one of the resource block and the code is a different combination).

In addition, the control unit 135 may also refer to the plural group Each of the one or more groups of each of the groups is assigned only different radio resources, and each of the remaining one or more of the other groups in the plural group is allocated the same radio resource and different. The combination of codes. Alternatively, the control unit 135 may assign only a different code to each of one or more groups of a part of the plural group, and the remaining one or more of the plural group Each of the groups is assigned a combination of the same code and a different wireless resource.

(b) Notice

For example, the control unit 135 notifies the base station 200 of the above-mentioned radio resource or the upper code assigned to each of the above complex group.

Specifically, for example, the control unit 135 transmits, via the communication unit 110, a message indicating information indicating the radio resource or the upper code. Send to base station 200.

<3.2. Composition of base station>

Next, an example of the configuration of the base station 200 according to the embodiment of the present disclosure will be described with reference to Fig. 15 . Fig. 15 is a block diagram showing an example of the configuration of the base station 200 according to the embodiment of the present disclosure. Referring to Fig. 15, base station 200 includes antenna unit 210, wireless communication unit 220, network communication unit 230, memory unit 240, and processing unit 250.

(antenna portion 210)

The antenna unit 210 radiates the signal output from the wireless communication unit 220 in a space by radio waves. Further, the antenna unit 210 converts the radio wave of the space into a signal, and outputs the signal to the wireless communication unit 220.

(Wireless communication unit 220)

The wireless communication unit 220 transmits and receives the signal. For example, the wireless communication unit 220 transmits a downlink signal to the terminal device and receives the uplink signal from the terminal device.

(Network Communication Department 230)

The network communication unit 230 communicates with other nodes. For example, the network communication unit 230 communicates with core network nodes and other base stations. For example, the network communication unit 230 communicates with the control entity 100.

(memory unit 240)

The memory unit 240 temporarily or permanently memorizes the programs and materials required for the operation of the base station 200.

(Processing unit 250)

The processing unit 250 provides various functions of the base station 200. The processing unit 250 includes an information acquisition unit 251 and a control unit 253. Further, the processing unit 250 may further include other components than these components. In other words, the processing unit 250 can perform operations other than the operations of these components.

(Information acquisition unit 251)

The information acquisition unit 251 obtains information indicating the radio resource or code required for the DRS to be transmitted, which is assigned to each of the plural groups of the small cellular network. Further, the above-mentioned radio resource or the upper code that has been assigned to each of the above-mentioned plural group is different from the radio resource or code that has been assigned to the other group among the above-mentioned plural group.

For example, the above information includes, for each of the above-mentioned plural groups, group identification information required to identify the group, and information indicating the wireless resource or code to which the group is assigned.

For example, as described above, the control entity 100 transmits the above-mentioned information of the upper radio resource or the upper code allocated to each of the above complex group to the base station 200, and the information is stored in the storage unit 240. . At any subsequent timing, the information acquisition unit 251 is from the memory. The department 240 obtains the above information.

(Control unit 253)

The control unit 253 notifies the terminal device of the above-mentioned radio resource or the upper code assigned to each of the complex group.

For example, the control unit 253 transmits the upper information of the upper radio resource or the upper code allocated to each of the above complex group to the terminal device via the antenna unit 210 and the wireless communication unit 220.

As an example, the control unit 253 notifies the system information (for example, any SIB (System Information Block)) containing the above information. As another example, the control unit 253 may notify the above-mentioned terminal device of the above information by an individual command (for example, an RRC (Radio Resource Control) command) to the terminal device.

By notifying the terminal device of the radio resource or the above-mentioned code, for example, the terminal device system can perform measurement based on the DRS transmitted using the radio resource or code of each group.

In addition, the base station 200 can also be a base station of a small honeycomb network. In this case, the control unit 253 controls the wireless communication of the base station 200 in such a manner that the base station 200 transmits the DRS using the radio resource or code allocated by the group to which the base station 200 belongs.

<3.3. Composition of terminal devices>

Next, an example of the configuration of the terminal device 300 according to the embodiment of the present disclosure will be described with reference to FIG. Figure 16 is an embodiment of the present disclosure A block diagram of an example of the configuration of the terminal device 300. Referring to Fig. 16, terminal device 300 includes an antenna unit 310, a wireless communication unit 320, a storage unit 330, and a processing unit 340.

(antenna portion 310)

The antenna unit 310 radiates the signal output from the wireless communication unit 320 in a space by radio waves. Further, the antenna unit 310 converts the radio wave of the space into a signal, and outputs the signal to the wireless communication unit 320.

(Wireless communication unit 320)

The wireless communication unit 320 sends and receives signals to and from the communication unit. For example, the wireless communication unit 320 receives the downlink signal from the base station and transmits the uplink signal to the base station.

(memory unit 330)

The memory unit 330 temporarily or permanently memorizes programs and materials required for the operation of the terminal device 300.

(Processing unit 340)

The processing unit 340 provides various functions of the terminal device 300. The processing unit 340 includes an information acquisition unit 341, a measurement unit 343, and a report unit 345. Further, the processing unit 340 may further include other components than these components. In other words, the processing unit 340 can perform operations other than the operations of these components.

(Information acquisition unit 341)

The information acquisition unit 341 obtains information indicating the radio resource or code required for the DRS to be transmitted, which is assigned to each of the plural groups of the small cellular network. Further, the above-mentioned radio resource or the upper code that has been assigned to each of the above-mentioned plural group is different from the radio resource or code that has been assigned to the other group among the above-mentioned plural group.

For example, the above information includes, for each of the above-mentioned plural groups, group identification information required to identify the group, and information indicating the wireless resource or code to which the group is assigned.

For example, as described above, the base station 200 transmits, to the terminal device 300, the above-mentioned information indicating that the radio resource or the upper code is allocated to each of the above-mentioned plural group, and the information is stored in the storage unit 330. . At any subsequent timing, the information acquisition unit 341 acquires the above-described information from the storage unit 330.

(measurement unit 343)

The measurement unit 343 performs measurement on the small honeycomb network included in the group based on the DRS transmitted using the radio resource or code assigned to the group for each of the above complex group.

The above measurement is an RRM measurement, for example, measurement of reception power or reception quality. More specifically, for example, the above measurement is a measurement of RSRP or RSRQ.

As the first example, the base station of the small honeycomb network is used. The radio resources allocated by the group to which the small cellular network belongs are used to transmit the DRS. In this case, the measurement unit 343 performs measurement for the above-described small-sized honeycomb network based on the DRS transmitted using the radio resource. More specifically, for example, the measurement unit 343 calculates the small RSRP and the RSRQ based on the received power of the DRS transmitted using the above-described radio resource.

As a second example, the base station of the small honeycomb network is used. The code (e.g., orthogonal code) to which the group to which the small cellular network belongs is to transmit the DRS. In this case, the measurement unit 343 performs measurement for the above-described small-sized honeycomb network based on the DRS transmitted using the code. More specifically, for example, the measurement unit 343 decodes the DRS transmitted using the upper code, and calculates the small RSRP and RSRQ based on the received DRS.

In addition, the above measurement is for each frequency band (for example, The carrier is carried out.

By the above measurement, for example, in the terminal device 300 Interference between DRS can be suppressed.

(Reporting Department 345)

The reporting unit 345 reports the result of the measurement on the small honeycomb network to the base station 200.

For example, the reporting unit 345 periodically measures the above. The result is reported to the base station 200. Further, for example, the report unit 345 records the result on the above measurement in accordance with the occurrence of the predetermined event. Reported to the base station 200.

<<4. Process of processing>>

Next, an example of the processing described in the embodiment of the present disclosure will be described with reference to Fig. 17 . Fig. 17 is a flowchart showing an example of a schematic flow of processing described in the embodiment of the present disclosure.

Control entity 100 (grouping unit 131), which will be a small honeycomb The net is divided into a plurality of groups (S401). Then, the control entity 100 (control unit 135) assigns a different radio resource or a different code required for the DRS transmission to each of the above-mentioned plural groups (S403). Then, the control entity 100 (control unit 135) notifies the base station 200 of the above-mentioned radio resource or the upper code assigned to each of the complex group (S405).

The base station 200 (control unit 253) will record the complex group The above-mentioned radio resource or the upper code assigned to each of the groups is notified to the terminal device 300 (S405).

The terminal device 300 (measurement unit 343) is for the above plural Each of the groups performs measurement on the small honeycomb network included in the group based on the DRS transmitted using the radio resource or code assigned to the group (S409). Thereafter, the terminal device 300 (reporting unit 345) reports the result of the measurement on the small honeycomb network to the base station 200 (S411).

<<5. Application examples>>

The technology described in the present disclosure can be applied to various products. For example, the control entity 100 can be implemented in a manner that can be any type of server such as a tower server, a rack server, or a blade server. Further, at least a part of the constituent elements of the control entity 100 may be a module mounted on a server (for example, an integrated circuit module composed of one wafer or an insertion slot inserted into a blade server) Card or blade) is implemented. Further, the control entity 100 can be realized by any of the types of base stations described later.

Also, for example, the base station 200 can also be implemented as a giant Any type of eNB (evolved Node B) such as an eNB or a small eNB is set. The small eNB may also be an eNB that covers a cellular network smaller than the macro hive network, such as a pico eNB, a micro eNB, or a home (femto) eNB. Alternatively, the base station 200 can be implemented as another type of base station such as a NodeB or a BTS (Base Transceiver Station). The base station 200 may include a main body (also referred to as a base station device) that controls wireless communication, and one or more RRHs (Remote Radio Heads) that are disposed at a place separated from the main body. Further, the base station function can be temporarily or semi-permanently executed by various types of terminals to be described later, and the base station 200 can be operated. In addition, at least a part of the components of the base station 200 can be implemented in a module required for the base station device or the base station device.

Further, for example, the terminal device 300 can also be implemented as Smart phone, tablet PC (Personal Computer), notebook PC, portable game terminal, portable/key mobile router or An action terminal such as a digital camera or an in-vehicle terminal such as a driving navigation device. Further, the terminal device 300 may be implemented as a terminal (also referred to as an MTC (Machine Type Communication) terminal) that performs M2M (Machine To Machine) communication. Further, at least a part of the components of the terminal device 300 can be realized by a module (for example, an integrated circuit module composed of one wafer) mounted on these terminals.

<5.1. Related application examples of control entities>

Fig. 18 is a block diagram showing an example of a schematic configuration of a server 700 to which the technique described in the present disclosure is applicable. The server 700 includes a processor 701, a memory 702, a storage 703, a network interface 704, and a bus 706.

The processor 701 can be, for example, a CPU (Central Processing Unit) or a DSP (Digital Signal Processor), and controls various functions of the server 700. The memory 702 includes a RAM (Random Access Memory) and a ROM (Read Only Memory), and stores programs and data executed by the processor 701. The storage medium 703 may include a memory medium such as a semiconductor memory or a hard disk.

The network interface 704 is the wired communication interface required to connect the server 700 to the wired communication network 705. The wired communication network 705 can be a core network such as EPC (Evolved Packet Core), or can be a PDN (Packet Data Network) such as the Internet.

The bus 706 connects the processor 701, the memory 702, the storage 703, and the network interface 704 to each other. Bus 706 can also contain There are more than two bus bars with different speeds (such as high speed bus and low speed bus).

In the server 700 shown in FIG. 18, reference is made to FIG. One or more constituent elements (the grouping unit 131, the information obtaining unit 133, and/or the control unit 135) included in the processing unit 130 described above may be implemented in the processor 701. As an example, a program necessary for causing the processor to operate as one or more components (in other words, a program necessary for the processor to execute one or more components) may be mounted to the servo. The program 700 is executed by the processor 701. As another example, the server 700 may be equipped with a module including the processor 701 and the memory 702, and one or more components are actually implemented in the module. In this case, the above-mentioned module can also store the program necessary for the processor to operate as one or more components, and store the program in the memory 702 by the processor 701. As described above, the server 700 or the upper module may be provided by means of a device having one or more components as described above, and the above-mentioned memory for operating the processor to be one or more components may be provided. Program. Further, a readable recording medium on which the above program is recorded may be provided.

<5.2. Application examples of base station> (First application example)

Fig. 19 is a block diagram showing a first example of a schematic configuration of an eNB to which the technique described in the present disclosure is applicable. The eNB 800 has one or more antennas 810 and a base station device 820. Each antenna 810 and base station device 820, They can be connected to each other through an RF cable.

Each of the antennas 810 has a single or multiple antennas Elements (e.g., a plurality of antenna elements constituting a MIMO antenna) are used to receive the wireless signals of the base station apparatus 820. The eNB 800 has a plurality of antennas 810 as shown in FIG. 19, and the complex antennas 810 may also correspond to, for example, a plurality of frequency bands used by the eNB 800, respectively. In addition, although FIG. 19 illustrates an example in which the eNB 800 has the complex antenna 810, the eNB 800 may have a single antenna 810.

The base station device 820 includes: a controller 821 and a memory 822, network interface 823 and wireless communication interface 825.

The controller 821 can be, for example, a CPU or a DSP, making the base Various functions of the upper layer of the stage device 820 operate. For example, the controller 821 generates a data packet from the data in the signal that has been processed by the wireless communication interface 825, and transmits the generated packet through the network interface 823. The controller 821 can also bundle the data from the complex baseband processor to generate a bundled packet, and transmit the generated bundled packet. Further, the controller 821 may have a function of performing Radio Resource Control, Radio Bearer Control, Mobility Management, Admission Control, or Scheduling. The logical function of control. Moreover, the control may be performed in cooperation with a neighboring eNB or a core network node. The memory 822 system includes a RAM and a ROM, and memorizes a program to be executed by the controller 821 and various control data (for example, a terminal list, a transmission power data, and a schedule data). Wait).

The network interface 823 is used to connect the base station device 820 The communication interface required to the core network 824. The controller 821 can also communicate with the core network node or other eNB through the network interface 823. In this case, the eNB 800 and the core network node or other eNBs may also be connected to each other by a logical interface (for example, an S1 interface or an X2 interface). The network interface 823 can be a wired communication interface or can be a wireless communication interface for wireless backhaul. If the network interface 823 is a wireless communication interface, the network interface 823 can also use a frequency band higher than the frequency band used by the wireless communication interface 825 for wireless communication.

Wireless communication interface 825, supports LTE (Long Term Any of the cellular communication methods, such as Evolution) or LTE-Advanced, provides a wireless connection to the terminals located in the cellular network of the eNB 800 through the antenna 810. The wireless communication interface 825, typically, may include a baseband (BB) processor 826, an RF circuit 827, and the like. The BB processor 826 is, for example, capable of performing encoding/decoding, modulation/demodulation, and multiplexing/reverse multiplexing, and performs various layers (for example, L1, MAC (Medium Access Control), RLC (Radio Link Control), and PDCP ( Packet Data Convergence Protocol)) A variety of signal processing. The BB processor 826 can also replace the controller 821 with some or all of the above logic functions. The BB processor 826 can also be a module containing: a memory for controlling the communication control program, a processor for executing the program, and a related circuit. The function of the BB processor 826 can also be changed by upgrading the program. Moreover, the above-mentioned module can also be inserted into the base station device 820. The card or blade of the slot can also be a chip that is mounted on the upper card or the upper blade. On the other hand, the RF circuit 827 may also include a mixer, a filter, an amplifier, etc., and transmit the wireless signal through the antenna 810.

The wireless communication interface 825 has multiple numbers as shown in FIG. The BB processor 826, the complex BB processor 826, respectively, corresponds to, for example, the complex frequency band used by the eNB 800. Further, the wireless communication interface 825 includes a plurality of RF circuits 827 as shown in FIG. 19, and the plurality of RF circuits 827 may also correspond to, for example, a plurality of antenna elements. In addition, although the wireless communication interface 825 is illustrated as an example including a plurality of BB processors 826 and a plurality of RF circuits 827 in FIG. 19, the wireless communication interface 825 may also include a single BB processor 826 or a single RF circuit 827.

Referring to FIG. 15 in the eNB 800 shown in FIG. One or more components (the information acquisition unit 251 and/or the control unit 253) included in the processing unit 250 may be implemented in the wireless communication interface 825. Alternatively, at least a part of these constituent elements may be implemented in the controller 821. As an example, the eNB 800 may also be equipped with a module including a portion (for example, the BB processor 826) or all of the wireless communication interface 825, and/or the controller 821, and one or more components are actually implemented in the module. In this case, the above-mentioned module can also be used to make the processor operate as a program for one or more components (in other words, a program required for the processor to execute one or more components). ) to remember and execute the program. As another example, a program required to make the processor operate as one or more components may be installed in the eNB 800 by a wireless communication interface 825 (for example, BB). The processor 826) and/or the controller 821 executes the program. As described above, the eNB 800, the base station device 820, or the upper module may be provided by means of a device having one or more components as described above, and the processor may be provided to have one or more components as described above. The required program. Further, a readable recording medium on which the above program is recorded may be provided. In this regard, one or more constituent elements (the grouping unit 131, the information obtaining unit 133, and/or the control unit 135) included in the processing unit 130 described with reference to FIG. 11 are also included in the processing unit 250. One or more components are the same.

Further, in the eNB 800 shown in FIG. 19, reference is made to FIG. The illustrated wireless communication unit 220 can also be implemented in a wireless communication interface 825 (e.g., RF circuit 827). Further, the antenna unit 210 can also be implemented in the antenna 810. Moreover, the network communication unit 230 can also be implemented in the controller 821 and/or the network interface 823.

(Second application example)

Fig. 20 is a block diagram showing a second example of a schematic configuration of an eNB to which the technique described in the present disclosure is applicable. The eNB 830 has one or more antennas 840, a base station device 850, and an RRH 860. Each antenna 840 and RRH 860 are connected to each other through an RF cable. Further, the base station device 850 and the RRH 860 can be connected to each other by a high-speed line such as an optical fiber.

Each of the antennas 840 has a single or multiple antennas Components (for example, a plurality of antenna elements constituting a MIMO antenna) are used To receive the wireless signal of the RRH860. The eNB 830 has a complex antenna 840 as shown in FIG. 20, and the complex antenna 840 may also correspond to, for example, a complex frequency band used by the eNB 830, respectively. In addition, although FIG. 20 illustrates an example in which the eNB 830 has the complex antenna 840, the eNB 830 may have a single antenna 840.

The base station device 850 includes a controller 851, a memory 852, a network interface 853, a wireless communication interface 855, and a connection interface 857. The controller 851, the memory 852, and the network interface 853 are the same as the controller 821, the memory 822, and the network interface 823 described with reference to FIG.

The wireless communication interface 855 supports any cellular communication mode such as LTE or LTE-Advanced, and provides a wireless connection to terminals located in the section corresponding to the RRH 860 through the RRH 860 and the antenna 840. The wireless communication interface 855, typically, may include a BB processor 856 or the like. The BB processor 856 is the same as the BB processor 826 described with reference to FIG. 19 except that it is connected to the RF circuit 864 of the RRH 860 through the connection interface 857. The wireless communication interface 855 includes a plurality of BB processors 856 as shown in FIG. 20, and the complex BB processors 856 correspond to, for example, the complex frequency bands used by the eNB 830, respectively. In addition, although the wireless communication interface 855 is illustrated as an example including a plurality of BB processors 856 in FIG. 20, the wireless communication interface 855 may also include a single BB processor 856.

The connection interface 857 is the interface required to connect the base station device 850 (wireless communication interface 855) with the RRH 860. The connection interface 857 can also be used to connect to the base station device 850 (wireless communication interface) 855) Communication module required for communication with the RRH860 on the high-speed line.

In addition, the RRH860 is equipped with a connection interface 861 and wireless communication. Interface 863.

Connection interface 861 for connecting RRH860 (wireless Communication interface 863) and the interface required by base station device 850. The connection interface 861 can also be used for the communication module required for high-speed line communication.

Wireless communication interface 863 is wirelessly transmitted through antenna 840 Signal. The wireless communication interface 863, typically, may include an RF circuit 864 or the like. The RF circuit 864 may also include a mixer, a filter, an amplifier, etc., and transmit the wireless signal through the antenna 840. The wireless communication interface 863 includes a plurality of RF circuits 864 as shown in FIG. 20, and the complex RF circuits 864 may also correspond to, for example, a plurality of antenna elements. In addition, although the wireless communication interface 863 is shown as an example including the complex RF circuit 864 in FIG. 20, the wireless communication interface 863 may also include a single RF circuit 864.

Referring to FIG. 15 in the eNB 830 shown in FIG. One or more components (the information acquisition unit 251 and/or the control unit 253) included in the processing unit 250 may be implemented in the wireless communication interface 855 and/or the wireless communication interface 863. Alternatively, at least a part of these constituent elements may be implemented in the controller 851. As an example, the eNB 830 may also be equipped with a module including one or more of the wireless communication interface 855 (for example, the BB processor 856) or the controller 851, and one or more components are actually implemented in the module. At this time, the upper model The group system can also memorize the program necessary for the processor to operate as one or more components (in other words, the program required for the processor to execute one or more components), and Execute the program. As another example, a program required to make the processor operate as one or more components may be installed in the eNB 830, and executed by the wireless communication interface 855 (for example, the BB processor 856) and/or the controller 851. Program. As described above, the eNB 830, the base station device 850, or the upper module may be provided by means of a device having one or more components as described above, and the processor may be provided to have one or more components as described above. The required program. Further, a readable recording medium on which the above program is recorded may be provided. In this regard, one or more constituent elements (the grouping unit 131, the information obtaining unit 133, and/or the control unit 135) included in the processing unit 130 described with reference to FIG. 11 are also included in the processing unit 250. One or more components are the same.

Further, in the eNB 830 shown in FIG. 20, for example, reference is made to The wireless communication unit 220 illustrated in FIG. 15 can also be implemented in a wireless communication interface 863 (eg, RF circuit 864). Further, the antenna unit 210 can also be implemented in the antenna 840. Moreover, the network communication unit 230 can also be implemented in the controller 851 and/or the network interface 853.

<5.3. Application examples of terminal devices> (First application example)

Fig. 21 is a block diagram showing an example of a schematic configuration of a smartphone 900 to which the technology described in the present disclosure is applicable. Smart phone 900 series has: The processor 901, the memory 902, the storage 903, the external connection interface 904, the camera 906, the sensor 907, the microphone 908, the input device 909, the display device 910, the speaker 911, the wireless communication interface 912, and more than one antenna switch 915, one or more antennas 916, a bus bar 917, a battery 918, and an auxiliary controller 919.

The processor 901 can be, for example, a CPU or a SoC (System) On Chip), which controls the application layer and other layers of the smart phone 900. The memory 902 includes a RAM and a ROM, and stores programs and data executed by the processor 901. The storage 903 may contain a memory medium such as a semiconductor memory or a hard disk. The external connection interface 904 may also be an interface required to connect an external device such as a memory card or a USB (Universal Serial Bus) device to the smart phone 900.

The camera 906 has, for example, a CCD (Charge Coupled) An imaging element such as Device) or CMOS (Complementary Metal Oxide Semiconductor) generates a captured image. The sensor 907 can include, for example, a sensor group of a positioning sensor, a gyro sensor, a geomagnetic sensor, and an acceleration sensor. The microphone 908 converts the sound input to the smart phone 900 into an audio signal. The input device 909 includes, for example, a touch sensor, a key pad, a keyboard, a button or a switch for detecting a touch on the screen of the display device 910, and accepts an operation or information input from a user. The display device 910 has a screen such as a liquid crystal display (LCD) or an organic light emitting diode (OLED) display, and displays an output image of the smart phone 900. The speaker 911 converts the sound signal output from the smartphone 900 into sound.

Wireless communication interface 912 supports LTE or LTE- Advanced cellular communication mode, such as Advanced, performs wireless communication. The wireless communication interface 912 typically includes a BB processor 913, an RF circuit 914, and the like. The BB processor 913 is, for example, capable of performing encoding/decoding, modulation/demodulation, and multiplexing/reverse multiplexing, and performs various signal processing required for wireless communication. On the other hand, the RF circuit 914 may include a mixer, a filter, an amplifier, and the like, and transmits a wireless signal through the antenna 916. The wireless communication interface 912 is typically a single-chip module that is condensed by the BB processor 913 and the RF circuit 914. The wireless communication interface 912 can also include a plurality of BB processors 913 and a plurality of RF circuits 914 as shown in FIG. In addition, although the wireless communication interface 912 is illustrated in FIG. 21 as an example including a plurality of BB processors 913 and a plurality of RF circuits 914, the wireless communication interface 912 may also include a single BB processor 913 or a single RF circuit 914.

Furthermore, the wireless communication interface 912 is in addition to the cellular communication. In addition to the method, it can also support short-range wireless communication methods, proximity wireless communication methods, or wireless LAN (Local Area Network) methods and other types of wireless communication methods. In this case, the BB processor 913 for each wireless communication method can be included. And RF circuit 914.

Each of the antenna switches 915 is in a wireless communication interface The connection destination of the antenna 916 is switched between a plurality of circuits (for example, circuits used in different wireless communication methods) included in 912.

Each of the antennas 916 has a single or multiple antennas Components (for example, a plurality of antenna elements constituting a MIMO antenna) are used To receive the wireless signal of the wireless communication interface 912. The smart phone 900 can also have a plurality of antennas 916 as shown in FIG. In addition, although FIG. 21 illustrates an example in which the smart phone 900 has a plurality of antennas 916, the smart phone 900 may have a single antenna 916.

Even the smart phone 900 can have every Antenna 916 for line communication. In this case, the antenna switch 915 can be omitted from the configuration of the smartphone 900.

The bus 917 is a processor 901, a memory 902, The storage body 903, the external connection interface 904, the camera 906, the sensor 907, the microphone 908, the input device 909, the display device 910, the speaker 911, the wireless communication interface 912, and the auxiliary controller 919 are connected to each other. The battery 918 supplies power to each block of the smartphone 900 shown in FIG. 21 through a power supply line shown by a broken line in the figure. The auxiliary controller 919, for example, in the sleep mode, operates the minimum necessary function of the smartphone 900.

In the smart phone 900 shown in FIG. 21, referring to FIG. One or more constituent elements (the information acquisition unit 341, the measurement unit 343, and/or the report unit 345) included in the processing unit 340 described above may be implemented in the wireless communication interface 912. Alternatively, at least a part of these constituent elements may be implemented in the processor 901 or the auxiliary controller 919. As an example, the smart phone 900 can also be equipped with a module including a part of the wireless communication interface 912 (for example, the BB processor 913) or all, the processor 901, and/or the auxiliary controller 919, and implemented in the module. One or more components are listed above. At this point, the above module can also be used to make The processor operation is a program required to write one or more constituent elements (in other words, a program necessary for the processor to execute an operation of recording one or more constituent elements), and the program is executed. As another example, a program required to make the processor operate as one or more components may be installed in the smart phone 900, by a wireless communication interface 912 (for example, the BB processor 913), the processor 901, and / or auxiliary controller 919 to execute the program. As described above, it is also possible to provide the smartphone 900 or the above-described module by means of a device having one or more constituent elements, and to provide a processor for operating one or more components. Program. Further, a readable recording medium on which the above program is recorded may be provided.

Moreover, in the smart phone 900 shown in FIG. 21, an example is shown. For example, the wireless communication unit 320 described with reference to FIG. 16 can also be implemented in the wireless communication interface 912 (eg, the RF circuit 914). Further, the antenna unit 310 can also be implemented in the antenna 916.

(Second application example)

Fig. 22 is a block diagram showing an example of a schematic configuration of a driving navigation device 920 to which the technology described in the present disclosure is applied. The driving navigation device 920 includes a processor 921, a memory 922, a GPS (Global Positioning System) module 924, a sensor 925, a data interface 926, a content player 927, a memory medium interface 928, an input device 929, and a display device. 930, a speaker 931, a wireless communication interface 933, one or more antenna switches 936, one or more antennas 937, and a battery 938.

The processor 921 can be, for example, a CPU or a SoC, and the control line The navigation function and other functions of the car navigation device 920. The memory 922 includes a RAM and a ROM, and stores programs and data executed by the processor 921.

GPS module 924 uses GPS received from GPS satellites Signals are used to determine the position (eg, latitude, longitude, and altitude) of the driving navigation device 920. The sensor 925 can include, for example, a sensor group of a gyro sensor, a geomagnetic sensor, and a barometric sensor. The data interface 926 is connected to the in-vehicle network 941 via a terminal (not shown), for example, and acquires data generated by the vehicle side such as vehicle speed data.

Content player 927, will be inserted into the memory media interface The content stored in the 928's memory media (such as CD or DVD) is reproduced. The input device 929 includes, for example, a touch sensor, a button or a switch that detects a touch on the screen of the display device 930, and accepts an operation or information input from a user. The display device 930 has a screen such as an LCD or an OLED display, and displays an image of the navigation function or the content being reproduced. The speaker 931 outputs the sound of the navigation function or the content to be reproduced.

Wireless communication interface 933 supports LTE or LTE- Advanced cellular communication mode, such as Advanced, performs wireless communication. The wireless communication interface 933, typically, may include a BB processor 934, an RF circuit 935, and the like. The BB processor 934 is, for example, capable of performing encoding/decoding, modulation/demodulation, and multiplexing/reverse multiplexing, and performs various signal processing required for wireless communication. On the other hand, the RF circuit 935 can also contain a mixer and filter. The device, the amplifier, and the like, receive the wireless signal through the antenna 937. The wireless communication interface 933 is typically a single-chip module that is condensed by the BB processor 934 and the RF circuit 935. The wireless communication interface 933 may also include a plurality of BB processors 934 and a plurality of RF circuits 935 as shown in FIG. In addition, although the wireless communication interface 933 is illustrated in FIG. 22 as an example including a plurality of BB processors 934 and a plurality of RF circuits 935, the wireless communication interface 933 may also include a single BB processor 934 or a single RF circuit 935.

Furthermore, the wireless communication interface 933 is in addition to the cellular communication. In addition to the method, it is also possible to support other types of wireless communication methods such as short-range wireless communication, proximity wireless communication, or wireless LAN. In this case, the BB processor 934 and the RF circuit 935 for each wireless communication method may be included.

Each of the antenna switches 936 is in a wireless communication interface The connection destination of the antenna 937 is switched between a plurality of circuits (for example, circuits used in different wireless communication methods) included in 933.

Each of the antennas 937 has a single or multiple antennas Elements (eg, a plurality of antenna elements that make up a MIMO antenna) are used to receive wireless signals from the wireless communication interface 933. The driving navigation device 920 may have a plurality of antennas 937 as shown in FIG. In addition, although the example in which the driving navigation device 920 has the plurality of antennas 937 is illustrated in FIG. 22, the driving navigation device 920 may have a single antenna 937.

Even the driving navigation device 920 can be equipped with each Antenna 937 for wireless communication. In this case, the antenna switch 936 is It can be omitted from the configuration of the driving navigation device 920.

Battery 938, powered by the dotted line in the figure The wires are supplied with power to the respective blocks of the driving navigation device 920 shown in FIG. Further, the battery 938 stores electric power supplied from the vehicle side.

In the driving navigation device 920 shown in FIG. 22, referring to FIG. One or more constituent elements (the information acquisition unit 341, the measurement unit 343, and/or the report unit 345) included in the processing unit 340 described above may be implemented in the wireless communication interface 933. Alternatively, at least a part of these constituent elements may be implemented in the processor 921. As an example, the driving navigation device 920 may be equipped with a module including a part of the wireless communication interface 933 (for example, the BB processor 934) or all of the processor 921, and one or more of the modules may be implemented in the module. Elements. In this case, the above-mentioned module can also be used to make the processor operate as a program for one or more components (in other words, a program required for the processor to execute one or more components). ) to remember and execute the program. As another example, a program required to operate the processor as one or more components may be installed in the navigation device 920 by a wireless communication interface 933 (eg, BB processor 934) and/or processor 921. To execute the program. As described above, it is also possible to provide the driving navigation device 920 or the above-described module by means of a device having one or more constituent elements, and to provide a processor for operating one or more components. Program. Further, a readable recording medium on which the above program is recorded may be provided.

Moreover, in the driving navigation device 920 shown in FIG. 22, an example is shown. For example, the wireless communication unit 320 described with reference to FIG. 16 can also be implemented in the wireless communication interface 933 (for example, the RF circuit 935). Further, the antenna unit 310 can also be implemented in the antenna 937.

Moreover, the technology described in the disclosure may also be implemented to include There are one or more blocks of the above-described driving navigation device 920, and an in-vehicle system (or vehicle) 940 of the in-vehicle network 941 and the vehicle-side module 942. In other words, the in-vehicle system (or vehicle) 940 may be provided in such a manner as to include a device including one or more constituent elements included in the processing unit 340. The vehicle side module 942 generates vehicle side data such as vehicle speed, engine speed, or failure information, and outputs the generated data to the in-vehicle network 941.

<<6. Summary>>

The communication device and the processes described in the present disclosure have been described so far with reference to Figs. 10 to 22 .

Control entity according to the embodiment described in the disclosure The 100-series includes: the information acquisition unit 133 acquires information on a plurality of groups of the small-sized honeycomb network; and the control unit 135 allocates different information required for the transmission of the reference signal to each of the above-mentioned plural groups. Wireless resources or different codes.

Moreover, according to the embodiment described in the disclosure, the base The station 200 includes: an information acquisition unit 251 that acquires information indicating a radio resource or a code required for transmission of a reference signal, which is allocated to each of a plurality of small groups of small honeycomb networks; and a control unit 253 , the wireless resource or the upper code is reported to the terminal device. Already assigned to the above plural The radio resource or the upper code of each of the groups is different from the radio resource or code that has been assigned to other groups in the above complex group.

Moreover, according to the embodiment described in the disclosure, the terminal The device 300 includes an information acquisition unit 341 that acquires information indicating the radio resource or code required for the transmission of the reference signal, which is allocated to each of the plurality of small groups of the small honeycomb network, and the measurement unit 343 For each of the above-mentioned plural groups, the measurement of the small honeycomb network included in the group is performed based on the discovery reference signal transmitted using the radio resource or code that has been allocated to the group. The above-mentioned radio resource or code that has been assigned to each of the above-mentioned plural groups is different from the radio resource or code that has been assigned to other groups among the above-mentioned plural group.

Thereby, for example, interference between DRSs can be suppressed.

Although the above description is based on the side of the drawing, The preferred embodiment of the invention is disclosed, but the disclosure is of course not limited to the examples. As long as it is a practitioner, various changes or modifications are naturally conceivable within the scope of the patent scope, and these are of course also within the technical scope of the present disclosure, and this must be understood.

For example, although it is stated that the control entity automatically performs small An example of a grouping of a type of cellular network (i.e., a small honeycomb network is divided into a plurality of groups), but the disclosure is not limited to the examples. For example, the above-mentioned grouping can be automatically performed by other devices, and the control real system will be provided with the result of the grouping. Alternatively, the operator of the cellular network system may manually perform the upper score grouping to control the actual system to obtain the result of the grouping.

Also, for example, although it is stated that the control entity and the base station are Examples of individual devices, but the disclosure is not limited to the examples. For example, it is also possible to implement a control entity in the base station.

Moreover, the processing steps in the processing of this specification are not It must be performed in a time series according to the sequence described in the flowchart or the program diagram. For example, the processing steps in the processing may be performed in an order different from the order described in the flowchart or the flowchart, or may be performed in parallel.

Also, it can be used to make the device of the present specification (for example A processor (for example, a CPU, a DSP, or the like) included in a control entity, a base station, or a terminal device or a module thereof is required to operate as a component of the above-described device (for example, an information acquisition unit and/or a control unit) Computer program (in other words, the computer program required to perform the actions of the components of the device on the computer). Also, the recording medium for recording the computer program can be provided. Also, the memory with the computer program can be provided. a device that can execute one or more processors on a computer program (for example, a finished product or a module (parts, processing circuit, or wafer) required for the finished product). The method of operation (for example, the information acquisition unit and/or the control unit) is also included in the technology described in the present disclosure.

Moreover, the effects described in the present specification are merely illustrative. Sexual or exemplary, not limiting interpretation. That is, the technology described in the present disclosure may also be used in addition to the above-mentioned effects, or may replace the above-mentioned effects, and achieve other effects that the practitioner can self-evident according to the description of the present specification.

In addition, the following configurations are also the techniques of the present disclosure. range.

(1)

An apparatus includes: an acquisition unit that acquires information on a plurality of groups of small honeycomb networks; and a control unit that allocates different wireless signals required for transmission of a reference signal to each of the preceding plural groups Resources or different codes.

(2)

The device described in the above (1), wherein the pre-recording control unit assigns different radio resources to each of the pre-recorded plural groups; and the different radio resources are different radio resources at different times.

(3)

The device described in the above (2), wherein the different radio resources are different radio resources of different subframes.

(4)

The device according to the above (1), wherein the pre-recording control unit allocates different radio resources to each of the pre-recorded plural groups; and the different radio resources are radio resources of different frequencies.

(5)

The device described in the above (4), wherein the different radio resources are different radio resources of different frequencies in the same component carrier.

(6)

The device described in the above (4) or (5), wherein the different radio resources are different resource blocks of different frequencies.

(7)

The device described in the above (1), wherein the pre-recording control unit assigns a different code to the pre-recording plural group.

(8)

The device according to any one of the preceding claims, wherein each of the preceding plural groups contains small honeycomb nets which are less likely to interfere with each other.

(9)

The device according to the above (8), wherein each of the preceding plural groups contains a small honeycomb network that is distant from each other.

(10)

The device according to any one of the preceding claims, wherein each of the preceding plural groups includes one or more small honeycomb networks in the same small honeycomb network cluster.

(11)

The device according to any one of the preceding claims, further comprising: a grouping unit that divides the small honeycomb network into a pre-complex group.

(12)

The device described in the above (11), wherein the pre-recording group is based on the position of the small-sized honeycomb network, and the pre-recorded small honeycomb network is divided into a pre-complex group.

(13)

The device described in the above (12), wherein the preamble grouping unit divides the pre-recorded small honeycomb network into a pre-complex group in such a manner that the distance between the small honeycomb networks in the group is increased.

(14)

The device described in the above (11), wherein the pre-recording group is based on the information on the interference between the small honeycomb networks, and divides the pre-recorded small honeycomb network into a pre-complex group.

(15)

The device described in the above (14), wherein the pre-recording group is divided into a pre-complex group in such a manner that interference between the small-sized honeycomb networks is small.

(16)

A method includes the steps of: obtaining information about a plurality of groups of small honeycomb networks; and assigning, by the processor, each of the pre-recorded plural groups different radio resources required for transmitting the reference signal Or a different code step.

(17)

An apparatus includes: an acquisition unit that acquires information of a radio resource or a code required to search for a reference signal for each of a plurality of small groups of small honeycomb networks; and a control unit Notifying the terminal device of the pre-recorded wireless resource or the pre-recording code; The preamble radio resource or preamble that has been assigned to each of the preamble complex groups is different from the radio resource or code that has been assigned to other groups in the preamble complex group.

(18)

A method comprising: obtaining, by each of a plurality of groups of small honeycomb networks, a step of exploring information of a radio resource or code required for transmission of a reference signal; and by using a processor a step of notifying a pre-recorded radio resource or preamble to a terminal device; a predecessor radio resource or a preamble that has been assigned to each of the preamble complex groups, and other groups that have been assigned to the pre-recorded plural group The wireless resources or codes are different.

(19)

An apparatus includes: an acquisition unit that acquires information of a radio resource or a code required to search for a reference signal for each of a plurality of small groups of small honeycomb networks; and a measurement unit For each of the preamble complex groups, based on the discovery reference signal transmitted using the radio resource or code that has been assigned to the group, the determination of the small cellular network contained in the group is performed; The preamble radio resource or preamble for each of the preamble complex groups is different from the radio resource or code that has been assigned to other groups in the preamble complex group.

(20)

A method comprising: obtaining, by each of a plurality of groups of small-sized cellular networks, a step of exploring information of a radio resource or code required for transmission of a reference signal; and Each of the pre-complexing groups performs a step of determining the small-sized cellular network included in the group based on the discovery reference signal transmitted using the radio resource or code that has been assigned to the group; The preamble radio resource or preamble assigned to each of the preamble complex groups is different from the radio resource or code that has been assigned to other groups in the preamble complex group.

(twenty one)

A program for causing a processor to perform: obtaining information about a plurality of groups of small cellular networks; and assigning each of the preceding plural groups to different wireless resources required for transmitting the reference signal Or a different code step.

(twenty two)

A computer readable recording medium for recording a program for causing a processor to perform: obtaining steps for information about a plurality of groups of small honeycomb networks; and assigning a search reference to each of the preceding plural groups The steps of the different wireless resources or different codes required for the signal transmission.

(twenty three)

A program for causing a processor to execute: a step of obtaining information indicating a radio resource or code required for transmission of a reference signal for each of a plurality of small groups of small cellular networks; and A program required for a step of notifying a wireless resource or a preamble to a terminal device, wherein a predecessor radio resource or a preamble that has been assigned to each of the preamble complex groups is assigned to the preamble complex group The other groups in the radio resource or code are different.

(twenty four)

A recording medium is a computer-readable recording medium on which a program is recorded. The program is used by the processor to: obtain a representation: each of a plurality of small groups of small honeycomb networks is allocated, and the reference signal is searched. a step of transmitting information of a wireless resource or code required for the communication; and a program required to notify the terminal device of the pre-recorded wireless resource or the preamble, wherein the pre-recorded wireless has been assigned to each of the pre-recorded plural groups The resource or preamble is different from the radio resource or code that has been assigned to other groups in the preamble complex group.

(25)

A program for causing a processor to execute: obtaining a step indicating that each of a plurality of small groups of small honeycomb networks is allocated to explore information of a wireless resource or code required for transmission of a reference signal. And for each of the above-mentioned plural groups, based on the discovery reference signal transmitted using the radio resource or code that has been allocated to the group, the measurement of the small honeycomb network included in the group is performed. a program required by the step, wherein the predecessor radio resource or preamble that has been assigned to each of the preamble complex groups is different from the radio resource or code that has been assigned to other groups in the preamble complex group .

(26)

A recording medium is a computer-readable recording medium on which a program is recorded. The program is used by the processor to: obtain a representation: each of a plurality of small groups of small honeycomb networks is allocated, and the reference signal is searched. The step of transmitting the information of the radio resource or code required for the message; and for each of the above-mentioned plural groups, based on the use of the discovery reference signal transmitted using the radio resource or code that has been assigned to the group, The program required for the step of determining the small honeycomb network contained in the group, wherein the predecessor radio resource or preamble that has been assigned to each of the preamble complex groups is assigned to the pre-complex group The other groups in the radio resources or codes are different.

Claims (20)

An apparatus includes: an acquisition unit that acquires information on a plurality of groups of small honeycomb networks; and a control unit that allocates different wireless signals required for transmission of a reference signal to each of the preceding plural groups Resources or different codes. The device according to claim 1, wherein the pre-recording control unit allocates different radio resources to each of the pre-recorded plural groups; and the different radio resources are different radio resources at different times. The device as claimed in claim 2, wherein the different radio resources are different radio resources of different subframes. The device according to claim 1, wherein the pre-recording control unit allocates different radio resources to each of the pre-recorded plural groups; and the different radio resources are radio resources of different frequencies. The device according to claim 4, wherein the different radio resources are different radio resources of different frequencies in the same component carrier. The device according to claim 4, wherein the different radio resources are different resource blocks of different frequencies. The device according to claim 1, wherein the pre-recording control unit assigns a different code to the pre-recording plural group. The device according to claim 1, wherein each of the pre-complexing groups includes a small honeycomb network that is less likely to interfere with each other. The device of claim 8, wherein each of the pre-complexing groups comprises a small honeycomb network that is remote from each other. The device according to claim 1, wherein each of the preceding plural groups includes one or more small honeycomb networks in the same small honeycomb network cluster. The device according to claim 1, further comprising: a grouping unit that divides the small honeycomb network into a pre-complex group. The device according to claim 11, wherein the pre-recording group is based on the position of the small-sized honeycomb network, and the pre-recorded small honeycomb network is divided into a pre-complex group. The device according to claim 12, wherein the pre-recording grouping unit divides the pre-recorded small honeycomb network into a pre-complex group in such a manner that the distance between the small honeycomb networks in the group is increased. The device according to claim 11, wherein the pre-recording group is based on the information on the interference between the small-sized cellular networks, and divides the pre-recorded small honeycomb network into a pre-complex group. The device according to claim 14, wherein the pre-recording group is divided into a pre-complexing group in such a manner that interference between the small-sized honeycomb networks is small. A method includes the steps of: obtaining information about a plurality of groups of small honeycomb networks; and assigning, by the processor, each of the pre-recorded plural groups different radio resources required for transmitting the reference signal Or a different code step. Device The acquisition unit obtains information indicating that the radio resource or code required for the transmission of the reference signal is allocated to each of the plurality of small groups of the small honeycomb network; and the control unit is a radio resource of the predecessor Or a preamble, notified to the terminal device; a predecessor radio resource or preamble that has been assigned to each of the preamble complex groups, and a radio resource or code that has been assigned to other groups in the preamble complex group different. A method comprising: obtaining, by each of a plurality of groups of small honeycomb networks, a step of exploring information of a radio resource or code required for transmission of a reference signal; and by using a processor a step of notifying a pre-recorded radio resource or preamble to a terminal device; a predecessor radio resource or a preamble that has been assigned to each of the preamble complex groups, and other groups that have been assigned to the pre-recorded plural group The wireless resources or codes are different. An apparatus includes: an acquisition unit that acquires information of a radio resource or a code required to search for a reference signal for each of a plurality of small groups of small honeycomb networks; and a measurement unit For each of the pre-complexing groups, based on the discovery reference signal transmitted using the radio resource or code that has been assigned to the group, To perform measurements on the small hive network contained in the group; the predecessor radio resources or preambles that have been assigned to each of the predecessor group, and other ones that have been assigned to the predecessor group The group's wireless resources or codes are different. A method comprising: obtaining, by each of a plurality of groups of small-sized cellular networks, a step of exploring information of a radio resource or code required for transmission of a reference signal; and Each of the pre-complexing groups performs a step of determining the small-sized cellular network included in the group based on the discovery reference signal transmitted using the radio resource or code that has been assigned to the group; The preamble radio resource or preamble assigned to each of the preamble complex groups is different from the radio resource or code that has been assigned to other groups in the preamble complex group.