WO2013129367A1 - Mobile station - Google Patents

Description

Mobile station

The present invention relates to a mobile station.

The LTE mobile communication system is configured to perform “Uplink CA (Carrier Aggregation)” in which an uplink signal is transmitted using a plurality of bands or a plurality of CCs (Component Carriers, component carriers).

However, in the wireless configuration for realizing the conventional FDD system, a Duplexer is inserted in order to suppress leakage from the uplink band to the downlink band in the same band.

On the other hand, in “Inter-band CA”, a signal leaks from the downlink band of its own band from the uplink band transmitted in a different band. In order to suppress the leakage, it is generally considered to additionally insert a diplexer.

In addition, the same examination is assumed when combining a plurality of “Intra-band CA” or “Intra-band CA” with an existing LTE band. In the following description, “Inter-band CA” is used as a premise. However, this examination is also applied to the above combinations.

For example, Duplexer # A / # B is inserted in the signal from the uplink band to the downlink band in band # A / # B (solid line in FIG. 7) in order to suppress the leakage.

In addition, with respect to a signal that leaks from the uplink band in band #A to the downlink band in band #B (solid line in FIG. 7), the leaking signal is similarly suppressed by inserting a diplexer.

Here, in order to reduce such influence in the LTE (Release-8) system, the “REFSENS” is used to reduce the signal leakage from the uplink band to the downlink band in the same band via the duplexer. Etc. "are defined.

Also, a case where only one band is used as an uplink is currently being studied.

However, no measures are taken against signal leakage from the uplink band to the downlink band between different bands via the duplexer when signals from multiple uplink bands are generated. Not.

In particular, there are problems such as transmission spurious, reception sensitivity degradation, transmission power reduction, and the like.

In order to solve this problem, “Uplink CA” on the premise of transmission of only 1 CC or 1 RF has been studied (Patent Document 1).

The mobile station UE for the “1RF Uplink CA” is configured to be able to transmit an uplink signal using a plurality of bands, but in the same subframe (Subframe), any one band or An uplink signal is transmitted using one CC (RF: Radio Frequency).

Japanese Patent Application No. 2012-022547

3GPP TS36.101

However, at present, there is a problem that the specific configuration of the mobile station UE is not considered in order to realize the above-mentioned “1RF Uplink CA” (or “1CC Uplink CA”). was there.

Therefore, the present invention has been made in view of the above-described problems, and an object thereof is to provide a mobile station capable of realizing “1RF Uplink CA” with an optimal configuration.

The first feature of the present invention is configured to transmit uplink signals using a plurality of bands, and at the same timing, using any one band or component carrier, A mobile station configured to transmit the uplink signal, comprising a radio processing unit and a baseband processing unit, wherein the radio processing unit includes a first band transmission circuit and a reception circuit; A transmission circuit and a reception circuit for the second band, an interband separation filter for separating the first band and the second band, and a first band for separating the uplink band and the downlink band in the first band. An intra-band separation filter, and a second intra-band separation filter that separates an uplink band and a downlink band in the second band, The baseband processing unit includes a plurality of transmission units corresponding to each of the plurality of bands configured to transmit via the first band transmission circuit or the second band transmission circuit, A plurality of receiving units corresponding to each of the plurality of bands configured to receive via a first band receiving circuit or a second band receiving circuit, each of the receiving units, and the transmission A control unit connected to each of the units, the control unit based on the uplink scheduling information received via the reception unit, via any of the transmission unit, the uplink signal The wireless processing unit is not provided with an intermodulation distortion suppression filter that suppresses intermodulation distortion.

FIG. 1 is an overall configuration diagram of a mobile communication system according to a first embodiment of the present invention. FIG. 2 is a functional block diagram of the mobile station according to the first embodiment of the present invention. FIG. 3 is an example of a functional block diagram of the RF processing unit in the mobile station according to the first embodiment of the present invention. FIG. 4 is an example of a functional block diagram of the RF processing unit in the mobile station according to the first embodiment of the present invention. FIG. 5 is an example of a functional block diagram of the BB processing unit in the mobile station according to the first embodiment of the present invention. FIG. 6 is an example of a functional block diagram of the BB processing unit in the mobile station according to the first embodiment of the present invention. FIG. 7 is a diagram for explaining problems of a conventional mobile communication system.

(Mobile communication system according to the first embodiment of the present invention)
With reference to FIG. 1 thru | or FIG. 6, the mobile communication system which concerns on the 1st Embodiment of this invention is demonstrated.

The mobile communication system according to the present embodiment is compatible with the LTE system, and can provide “Inter-band CA” and “Intra-band non-constitutive CA”.

In addition, the same examination is also assumed when combining a plurality of “Intra-band CA” or “Intra-band non-contiguous CA” with an existing LTE band.

Hereinafter, “Inter-band CA” will be described as a premise, but the present invention is also applied to the above combinations. That is, when one band is composed of one CC, it can be regarded as a configuration per CC. In the following, it is assumed that a plurality of bands are controlled, but a plurality of CCs may be controlled.

As shown in FIG. 1, the mobile communication system according to the present embodiment manages a radio base station eNB # 1 that manages a cell # 1, a radio base station eNB # 11 that manages a cell # 11, and a cell # 12. A radio base station eNB # 12 that manages the cell # 13 and a radio base station eNB # 13 that manages the cell # 13.

Here, in the mobile communication system according to the present embodiment, it is assumed that the coverage areas of the cells # 11 to # 13 are included in the coverage area of the cell # 1, as shown in FIG.

Note that cell # 1 is a macro cell and is operated in band # 1, and cells # 11 to # 13 are pico cells and may be operated in bands # 11 to # 13.

In the mobile communication system according to the present embodiment, it is assumed that cell # 1 is set to Pcell and cells # 11 to # 13 are set to Scell for mobile station UE.

Also, the mobile station UE according to the present embodiment is configured to be able to realize “1RF Uplink CA”. As shown in FIG. 2, the mobile station UE according to the present embodiment includes an RF (Radio Frequency) processing unit 1 and a BB (Base Band) processing unit 2.

As shown in FIG. 3, the RF processing unit 1 of the mobile station UE that can support the existing “Uplink CA” includes an IM (Inter-Modulation) suppression filter 10 that suppresses intermodulation distortion, a band F1, and a band F2. The diplexer 11 to be separated, the duplexer 12A for separating the uplink band and the downlink band in the band F1, the duplexer 12B for separating the uplink band and the downlink band in the band F2, and the transmission circuit 13A for the band F1 And a reception circuit 14A, a transmission circuit 13B for band F2, and a reception circuit 14B.

On the other hand, as shown in FIG. 4, the RF processing unit 1 of the mobile station UE capable of supporting “1RF Uplink CA” includes a diplexer 11 that separates the band F1 and the band F2, and an uplink band in the band F1. And the duplexer 12A for separating the downlink band, the duplexer 12B for separating the uplink band and the downlink band in the band F2, the transmission circuit 13A and the reception circuit 14A for the band F1, and the transmission circuit 13B for the band F2. And a receiving circuit 14B.

That is, the IM suppression filter 10 is not provided in the RF processing unit 1 of the mobile station UE that can handle “1RF Uplink CA”.

Further, as shown in FIG. 5, the BB processing unit 2 of the mobile station UE capable of supporting the existing “Uplink CA” transmits a plurality of transmissions corresponding to each of the plurality of bands # 1 to # (N−1). Units 23 # 1 to 23 # (N-1), a plurality of reception units 21 # 1 to 21 # (N-1) corresponding to each of the plurality of bands # 1 to ## (N-1), and reception Control units 22 # 1 to 22 # (N-1) connected to each of the units 21 # 1 to 21 # (N-1) and each of the transmission units 23 # 1 to 23 # (N-1). It has.

Here, the transmission units 23 # 1 to 23 # (N−1) are configured to transmit via the transmission circuit 13A for the band F1 or the transmission circuit 13B for the band F2, and the reception unit 21 # 1. ˜21 # (N−1) is configured to be received via the reception circuit 14A for the band F1 or the reception circuit 14B for the band F2.

Each of the control units 22 # 1 to 22 # (N-1) is based on the uplink scheduling information received via each of the reception units 21 # 1 to 21 # (N-1). Each of 23 # (N-1) is instructed to transmit a PUSCH (Physical Uplink Shared Channel, physical uplink shared channel) signal.

Note that each of the control units 22 # 1 to 22 # (N-1) transmits a PUSCH signal to each of the transmission units 23 # 1 to 23 # (N-1) as a PUCCH (Physical Uplink Control Channel, physical uplink). Link control channel) signal can be instructed to “Piggy back”.

The mobile station UE capable of supporting the existing “Uplink CA” is configured to transmit simultaneous transmission capability information indicating that an uplink data signal can be transmitted via a plurality of bands in the same subframe. May be.

Alternatively, the mobile station UE capable of supporting the existing “Uplink CA” simultaneously transmits that the predetermined communication quality can be ensured when uplink data signals are transmitted via a plurality of bands in the same subframe. The capability information may be transmitted.

On the other hand, as shown in FIG. 6, the BB processing unit 2 of the mobile station UE capable of supporting “1RF Uplink CA” has a plurality of bands corresponding to each of a plurality of bands # 1 to # (N−1) Transmitting sections 23 # 1 to 23 # (N-1) and a plurality of receiving sections 21 # 1 to 21 # (N-1) corresponding to each of the plurality of bands # 1 to ## (N-1) And a control unit 22 connected to each of the receiving units 21 # 1 to 21 # (N-1) and each of the transmitting units 23 # 1 to 23 # (N-1).

Here, the transmission units 23 # 1 to 23 # (N−1) are configured to transmit via the transmission circuit 13A for the band F1 or the transmission circuit 13B for the band F2, and the reception unit 21 # 1. ˜21 # (N−1) is configured to be received via the reception circuit 14A for the band F1 or the reception circuit 14B for the band F2.

Each of the control units 22 selects one of the transmission units 23 # 1 to 23 # (N-1) based on the uplink scheduling information received via each of the reception units 21 # 1 to 21 # (N-1). Via which a PUSCH signal should be transmitted.

Note that the mobile station UE capable of supporting “1RF Uplink CA” is configured to transmit simultaneous transmission capability information indicating that an uplink data signal cannot be transmitted via a plurality of bands in the same subframe. It may be.

In such a case, when the mobile station UE has a function of communicating using a plurality of bands, it indicates that communication is performed using one of the bands.
Alternatively, the mobile station UE capable of supporting “1RF Uplink CA” has a simultaneous transmission capability indicating that the predetermined communication quality cannot be ensured when uplink data signals are transmitted via a plurality of bands in the same subframe. It may be configured to transmit information.

In addition, in the cells # 11 to # 13, the mobile station UE that can support “1RF Uplink CA” is a CC in the band used in the cells # 11 to # 13, that is, an SCC (Secondary Component Carrier) #. It may be configured to transmit an uplink signal using only 11 to # 13.

Further, the mobile station UE that can support the existing “Uplink CA” may be configured to realize “1RF Uplink CA” in the cells # 11 to # 13.

That is, the mobile station UE that can support the existing “Uplink CA” is the CC in the band used in the cells # 11 to # 13 in the cells # 11 to # 13, that is, the SCCs # 11 to # 13. However, it may be configured to transmit an uplink signal.

In such a case, the mobile station UE capable of supporting the existing “Uplink CA” transmits the simultaneous transmission capability information indicating that the uplink data signal cannot be transmitted via a plurality of bands in the same subframe. It may be configured.

Alternatively, in such a case, the mobile station UE that can support the existing “Uplink CA” cannot guarantee the predetermined communication quality when transmitting an uplink data signal via a plurality of bands in the same subframe. You may be comprised so that the simultaneous transmission capability information shown may be transmitted.

According to the mobile communication system according to the first embodiment of the present invention, “1RF Uplink CA” can be realized by the mobile station UE having a simple configuration.

The features of the present embodiment described above may be expressed as follows.

The first feature of this embodiment is configured to be able to transmit an uplink signal using a plurality of bands, and in the same subframe (timing), any one band or CC ( RF) is a mobile station UE configured to transmit an uplink signal, and includes an RF processing unit (radio processing unit) 1 and a BB processing unit (baseband processing unit) 2. The RF processing unit 1 separates the transmission circuit 13A and reception circuit 14A for the band F1 (first band), the transmission circuit 13B and reception circuit 14B for the band F2 (second band), and the bands F1 and F2. A duplexer (interband separation filter) and a duplexer (first intraband separation filter) that separates the uplink band and the downlink band in the band F1 2A and a duplexer (second in-band separation filter) 12B that separates the uplink band and the downlink band in the band F2, and the BB processing unit 2 includes a transmission circuit 13A for the band F1 or A plurality of transmitters 23 # 1 to 23 # (N-1) corresponding to each of the plurality of bands # 1 to # (N-1) configured to transmit via the transmission circuit 13B for the band F2 ) And a plurality of receptions corresponding to each of a plurality of bands # 1 to # (N−1) configured to receive via the reception circuit 14A for the band F1 or the reception circuit 14B for the band F2. Connected to each of receivers 21 # 1 to 21 # (N-1), receivers 21 # 1 to 21 # (N-1), and transmitters 23 # 1 to 23 # (N-1). Control unit 22 and control 22 transmits the uplink signal via any of the transmission units 23 # 1 to 23 # (N-1) based on the uplink scheduling information received via the reception units 21 # 1 to 21 # (N-1). It is configured to determine whether to transmit, and the RF processing unit is not provided with an IM suppression filter (intermodulation distortion suppression filter) 10 that suppresses intermodulation distortion.

Note that the operations of the radio base station eNB and the mobile station UE described above may be implemented by hardware, may be implemented by a software module executed by a processor, or may be implemented by a combination of both. .

Software modules include RAM (Random Access Memory), flash memory, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electronically Erasable and Programmable, Removable ROM, and Hard Disk). Alternatively, it may be provided in an arbitrary format storage medium such as a CD-ROM.

The storage medium is connected to the processor so that the processor can read and write information from and to the storage medium. Further, such a storage medium may be integrated in the processor. Such a storage medium and processor may be provided in the ASIC. Such an ASIC may be provided in the radio base station eNB and the mobile station UE. Further, the storage medium and the processor may be provided in the radio base station eNB and the mobile station UE as discrete components.

As described above, the present invention has been described in detail using the above-described embodiments. However, it is obvious for those skilled in the art that the present invention is not limited to the embodiments described in the present specification. The present invention can be implemented as modifications and changes without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention.

Note that the entire content of Japanese Patent Application No. 2012-040600 (filed on February 27, 2012) is incorporated herein by reference.

As described above, according to the present invention, it is possible to provide a mobile station capable of realizing “1RF Uplink CA” with an optimal configuration.

eNB ... radio base station UE ... mobile station 1 ... RF processing unit 11 ... Diplexer
12A, 12B ... Duplexer
2... BB processing units 21 # 1 to 21 # (N-1)... Receiving unit (CC # 1) to receiving unit (CC # (N-1))
22. Control units 22 # 1 to 22 # (N-1) ... Control unit (CC # 1) to control unit (CC # (N-1))
23 # 1 to 23 # (N-1) ... transmission unit (CC # 1) to transmission unit (CC # (N-1))

Claims (1)

The uplink signal is configured to be transmitted using a plurality of bands, and at the same timing, the uplink signal is transmitted using any one band or component carrier. A configured mobile station,
A wireless processing unit and a baseband processing unit,
The wireless processing unit
A transmission circuit and a reception circuit for the first band;
A transmission circuit and a reception circuit for the second band;
An interband separation filter for separating the first band and the second band;
A first in-band separation filter for separating an uplink band and a downlink band in the first band;
A second in-band separation filter for separating an uplink band and a downlink band in the second band;
The baseband processing unit
A plurality of transmitting units corresponding to each of the plurality of bands configured to transmit via the first band transmitting circuit or the second band transmitting circuit;
A plurality of receiving units corresponding to each of the plurality of bands configured to receive via the first band receiving circuit or the second band receiving circuit;
A control unit connected to each of the reception unit and each of the transmission unit,
The control unit is configured to determine which of the transmission units should transmit the uplink signal based on uplink scheduling information received via the reception unit,
The mobile station, wherein the wireless processing unit is not provided with an intermodulation distortion suppression filter that suppresses intermodulation distortion.

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