KR20170021201A - Method for transmitting and receiving signal by aggregating three downlink carriers and two uplink carriers - Google Patents

Abstract

When a terminal aggregates three downlink carrier waves using carrier aggregation (CA) of LTE-A technology and transmits an uplink signal on two uplink carrier waves while the two uplink carrier waves are aggregated, a harmonic component and an intermodulation distortion (IMD) component are generated. Therefore, it can affect a downlink band of the terminal itself. Therefore, the present specification suggests a scheme therefor.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for aggregating three downlink carriers and two uplink carriers to transmit and receive signals,

The present invention relates to mobile communications.

The 3rd Generation Partnership Project (3GPP) long term evolution (LTE), an enhancement of Universal Mobile Telecommunications System (UMTS), is introduced as 3GPP release 8. 3GPP LTE uses orthogonal frequency division multiple access (OFDMA) in the downlink and single carrier-frequency division multiple access (SC-FDMA) in the uplink.

Recently, the development of 3GPP LTE-A (LTE-Advanced), which is an evolution of 3GPP LTE, has been completed. According to the LTE-A, a carrier aggregation (CA) technique in which a plurality of bands are used together is proposed.

The frequency band, or carrier, that can be used for LTE / LTE-A, has been defined in 3GPP, taking into account the propagation of various countries.

On the other hand, when the UE aggregates three downlink carriers using the carrier aggregation (CA) of the LTE-A technology and transmits the uplink signals on the two uplink carriers while aggregating the two uplink carriers A harmonic component and an intermodulation distortion (IMD) component are generated, which can affect the downlink band of the terminal itself.

Accordingly, the disclosure of the present specification aims at solving the above-mentioned problems.

In order to achieve the above object, one disclosure of the present disclosure provides a method for transmitting and receiving signals in carrier aggregation. The method may include transmitting uplink signals using the two uplink carriers when aggregating the three downlink carriers and aggregating the two uplink carriers. Here, the downlink carriers include three of Evolved Universal Terrestrial Radio Access (E-UTRA) operating bands 1, 3, 5, 7, and 20, and the uplink carriers may include two uplink carriers. The method may include receiving a downlink signal through at least one of the three downlink carriers. If the center frequency of the first uplink carrier of the uplink carriers corresponds to a first value and the center frequency of the third downlink carrier of the downlink carriers belongs to the second value, The MSD (Maximum Sensitivity Degradation) preset for the reference sensitivity of the MS can be successfully applied.

Wherein the three downlink carriers are E-UTRA bands 1, 5 and 7, the two uplink carriers are E-UTRA bands 1 and 7, and the center frequency of the first uplink carrier is 1968 MHz , And the MSD value may be 0.22 dB or 0 dB when the center frequency of the second uplink carrier corresponds to 2512 MHz and the center frequency of the third downlink carrier corresponds to 880 MHz.

Here, when the number of RBs of the first uplink carrier is 25 and the number of RBs of the second uplink carrier is 50, the MSD value may be 0.22 dB or 0 dB.

UTRA bands 3, 5 and 7, the two uplink carriers are E-UTRA bands 3 and 7, and the center frequency of the first uplink carrier is at 1737 MHz , And the MSD value may be 22 dB when the center frequency of the second uplink carrier corresponds to 2543 MHz and the center frequency of the third downlink carrier corresponds to 806 MHz.

Here, when the number of RBs of the first uplink carrier is 25 and the number of RBs of the second uplink carrier is 50, the MSD value may be 22 dB.

UTRA bands 3, 5 and 7, the two uplink carriers are E-UTRA bands 3 and 20, and the center frequency of the first uplink carrier is at 1775 MHz , And the MSD value may be 23 dB when the center frequency of the second uplink carrier corresponds to 885 MHz and the center frequency of the third downlink carrier corresponds to 2630 MHz.

Here, when the number of RBs (Resource Block) of the first uplink carrier is 50 and the number of RBs of the second uplink carrier is 25, the MSD value may be 23 dB.

In order to accomplish the above object, one disclosure of the present disclosure provides a terminal for transmitting and receiving signals in a carrier aggregation. The terminal may include a transmitter for transmitting an uplink signal using the uplink carrier waves when the terminal aggregates three downlink carriers and is configured to aggregate two uplink carriers. Here, the downlink carriers include three of Evolved Universal Terrestrial Radio Access (E-UTRA) operating bands 1, 3, 5, 7, and 20, and the uplink carriers may include two uplink carriers. The terminal may include a receiver for receiving a downlink signal through at least one of the three downlink carriers. When the center frequency of a first uplink carrier of the uplink carriers corresponds to a first value and the center frequency of a third downlink carrier among the downlink carriers belongs to a second value, And may include a processor that receives the MSD (Maximum Sensitivity Degradation) preset for a reference sensitivity of the signal.

According to the disclosure of the present specification, the above-mentioned problems are solved.

1 is an exemplary diagram illustrating a wireless communication system.
2 shows a structure of a radio frame according to FDD in 3GPP LTE.
3 is an exemplary diagram illustrating a resource grid for one uplink or downlink slot in 3GPP LTE.
4 shows a structure of a downlink sub-frame.
5 shows a structure of a UL subframe in 3GPP LTE.
6A and 6B are conceptual diagrams showing an intra-band carrier aggregation (CA).
7A and 7B are conceptual diagrams showing inter-band carrier aggregation.
FIG. 8 is a graphical representation of a wanted signal to minimize the influence on the adjacent channel by the filter during transmission and an unwanted emission other than the self-transmission band,
Fig. 9 is a graphical representation of the spurious emission standard in the out-of-band, commonly referred to as the spurious emission shown in Fig. 8,
FIG. 10 shows the relationship between the channel band (MHz) and the resource block (RB) shown in FIG.
11 is a diagram illustrating an example of a method for limiting transmission power of a terminal.
12 shows an example of an RF architecture that can be used for aggregation of three downlink carriers and two uplink carriers.
13 is a block diagram illustrating a wireless communication system in which the present disclosure is implemented.

Hereinafter, the present invention is applied based on 3GPP (Long Term Evolution) or 3GPP LTE-A (LTE-Advanced). This is merely an example, and the present invention can be applied to various wireless communication systems. Hereinafter, LTE includes LTE and / or LTE-A.

It is noted that the technical terms used herein are used only to describe specific embodiments and are not intended to limit the invention. It is also to be understood that the technical terms used herein are to be interpreted in a sense generally understood by a person skilled in the art to which the present invention belongs, Should not be construed to mean, or be interpreted in an excessively reduced sense. Further, when a technical term used herein is an erroneous technical term that does not accurately express the spirit of the present invention, it should be understood that technical terms that can be understood by a person skilled in the art are replaced. In addition, the general terms used in the present invention should be interpreted according to a predefined or prior context, and should not be construed as being excessively reduced.

Also, the singular forms "as used herein include plural referents unless the context clearly dictates otherwise. In the present application, the term "comprising" or "having ", etc. should not be construed as necessarily including the various elements or steps described in the specification, and some of the elements or portions thereof Or may further include additional components or steps.

Furthermore, terms including ordinals such as first, second, etc. used in this specification can be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

When an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may be present in between. On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like or similar elements throughout the several views, and redundant description thereof will be omitted. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. It is to be noted that the accompanying drawings are only for the understanding of the present invention and should not be construed as limiting the scope of the present invention. The spirit of the present invention should be construed as extending to all modifications, equivalents, and alternatives in addition to the appended drawings.

The term base station, as used hereinafter, refers to a fixed station that typically communicates with a wireless device and includes an evolved-NodeB (eNodeB), an evolved-NodeB (eNB), a Base Transceiver System (BTS) Access Point).

Hereinafter, the term UE (User Equipment), which is used in the following description, may be fixed or mobile and may be a device, a wireless device, a terminal, a mobile station (MS), a user terminal (UT) , Subscriber station (SS), mobile terminal (MT), and the like.

1 illustrates a wireless communication system; It is also an example .

1, the wireless communication system includes at least one base station 20 (BS). Each base station 20 provides a communication service to a specific geographical area (generally called a cell) 20a, 20b, 20c.

A UE typically belongs to one cell, and the cell to which the UE belongs is called a serving cell. A base station providing a communication service to a serving cell is called a serving BS. Since the wireless communication system is a cellular system, there are other cells adjacent to the serving cell. Another cell adjacent to the serving cell is called a neighbor cell. A base station that provides communication services to neighbor cells is called a neighbor BS. The serving cell and the neighboring cell are relatively determined based on the UE.

Hereinafter, the downlink refers to the communication from the base station 20 to the UE 10, and the uplink refers to the communication from the UE 10 to the base station 20. In the downlink, the transmitter may be part of the base station 20 and the receiver may be part of the UE 10. In the uplink, the transmitter may be part of the UE 10 and the receiver may be part of the base station 20.

Hereinafter, the LTE system will be described in more detail.

2 is a cross- 3GPP In LTE  Shows the structure of a radio frame according to the FDD.

The radio frame shown in FIG. 2 can refer to section 5 of 3GPP TS 36.211 V10.4.0 (2011-12) "Evolved Universal Terrestrial Radio Access (E-UTRA), Physical Channels and Modulation (Release 10)".

Referring to FIG. 2, a radio frame includes 10 subframes, and one subframe includes 2 slots. The slots in the radio frame are slot numbered from 0 to 19. The time taken for one subframe to be transmitted is called a transmission time interval (TTI). TTI is a scheduling unit for data transmission. For example, the length of one radio frame is 10 ms, the length of one subframe is 1 ms, and the length of one slot may be 0.5 ms.

The structure of the radio frame is merely an example, and the number of subframes included in the radio frame, the number of slots included in the subframe, and the like can be variously changed.

On the other hand, one slot may include a plurality of orthogonal frequency division multiplexing (OFDM) symbols. How many OFDM symbols are included in one slot may vary according to a cyclic prefix (CP).

3, 3GPP In LTE  A resource grid for one uplink or downlink slot is shown. It is also an example .

Referring to FIG. 3, an uplink slot includes a plurality of orthogonal frequency division multiplexing (OFDM) symbols in a time domain and includes N _RB resource blocks (RB) in a frequency domain. For example, in the LTE system, the number of resource blocks (RBs), i.e., N _RB , can be any of 6 to 110. The RB is also referred to as PRB (Physical Resource Block).

A resource block (RB) is a resource allocation unit, and includes a plurality of subcarriers in one slot. For example, if one slot includes 7 OFDM symbols in the time domain and the resource block includes 12 subcarriers in the frequency domain, one resource block includes 7x12 resource elements (REs) .

On the other hand, the number of subcarriers in one OFDM symbol can be selected from among 128, 256, 512, 1024, 1536 and 2048.

In the 3GPP LTE of FIG. 4, a resource grid for one uplink slot can be applied to a resource grid for a downlink slot.

4 shows a structure of a downlink sub-frame.

In FIG. 4, seven OFDM symbols are included in one slot, assuming a normal CP.

A DL (downlink) subframe is divided into a control region and a data region in a time domain. The control region includes up to three OFDM symbols preceding the first slot in the subframe, but the number of OFDM symbols included in the control region may be changed. A Physical Downlink Control Channel (PDCCH) and another control channel are allocated to the control region, and a PDSCH is allocated to the data region.

In the 3GPP LTE, a physical channel includes a Physical Downlink Shared Channel (PDSCH), a Physical Uplink Shared Channel (PUSCH), a Physical Downlink Control Channel (PDCCH), a Physical Control Format Indicator Channel (PCFICH) ARQ Indicator Channel) and PUCCH (Physical Uplink Control Channel).

The PCFICH transmitted in the first OFDM symbol of the subframe carries a control format indicator (CFI) regarding the number of OFDM symbols (i.e., the size of the control region) used for transmission of the control channels in the subframe. The wireless device first receives the CFI on the PCFICH and then monitors the PDCCH.

Unlike PDCCH, PCFICH does not use blind decoding, but is transmitted via fixed PCFICH resources in the subframe. The PHICH carries an ACK (positive-acknowledgment) / NACK (negative-acknowledgment) signal for a hybrid automatic repeat request (UL HARQ). The ACK / NACK signal for UL (uplink) data on the PUSCH transmitted by the wireless device is transmitted on the PHICH.

A PBCH (Physical Broadcast Channel) is transmitted in four OFDM symbols preceding the second slot of the first subframe of the radio frame. The PBCH carries the system information necessary for the radio equipment to communicate with the base station, and the system information transmitted through the PBCH is called the master information block (MIB). In contrast, the system information transmitted on the PDSCH indicated by the PDCCH is called a system information block (SIB).

The PDCCH includes a resource allocation and transmission format of a downlink-shared channel (DL-SCH), resource allocation information of an uplink shared channel (UL-SCH), paging information on a PCH, system information on a DL- Resource allocation of upper layer control messages such as responses, aggregation of transmission power control commands for individual UEs in any UE group, and activation of voice over internet protocol (VoIP). A plurality of PDCCHs may be transmitted in the control domain, and the UE may monitor a plurality of PDCCHs. The PDCCH is transmitted on an aggregation of one or several consecutive control channel elements (CCEs). The CCE is a logical allocation unit used to provide the PDCCH with the coding rate according to the state of the radio channel. The CCE corresponds to a plurality of resource element groups. The format of the PDCCH and the number of bits of the possible PDCCH are determined according to the relationship between the number of CCEs and the coding rate provided by the CCEs.

The control information transmitted through the PDCCH is referred to as downlink control information (DCI). The DCI includes a resource allocation (also referred to as a DL grant) of the PDSCH, a resource allocation (also referred to as an UL grant) of the PUSCH, a set of transmission power control commands for individual UEs in any UE group And / or Voice over Internet Protocol (VoIP).

The base station determines the PDCCH format according to the DCI to be sent to the UE, and attaches a CRC (cyclic redundancy check) to the control information. The CRC is masked with a unique radio network temporary identifier (RNTI) according to the owner or use of the PDCCH. If the PDCCH is for a particular UE, the unique identifier of the UE, e.g. C-RNTI (cell-RNTI), may be masked in the CRC. Alternatively, if the PDCCH is for a paging message, a paging indication identifier, e.g., a paging-RNTI (P-RNTI), may be masked on the CRC. If the PDCCH is a PDCCH for a system information block (SIB), a system information identifier (SI-RNTI) may be masked in the CRC. A random access-RNTI (RA-RNTI) may be masked in the CRC to indicate a random access response that is a response to the transmission of the UE's random access preamble.

In 3GPP LTE, blind decoding is used for PDCCH detection. Blind decoding is a method for checking whether a corresponding PDCCH is a control channel by checking a CRC error by demodulating a desired identifier in a cyclic redundancy check (CRC) of a received PDCCH (referred to as a candidate PDCCH) . The base station determines the PDCCH format according to the DCI to be transmitted to the wireless device, attaches a CRC to the DCI, and masks a unique identifier (RNTI) to the CRC according to the owner or use of the PDCCH.

The uplink channel includes a PUSCH, a PUCCH, a sounding reference signal (SRS), and a physical random access channel (PRACH).

Degree 5 is 3GPP In LTE  And shows the structure of the uplink subframe.

Referring to FIG. 5, an uplink subframe may be divided into a control region and a data region in a frequency domain. A PUCCH (Physical Uplink Control Channel) for transmitting uplink control information is allocated to the control region. A data area is allocated a physical uplink shared channel (PUSCH) for transmitting data (in some cases, control information may be transmitted together).

The PUCCH for one UE is allocated as a resource block pair (RB pair) in a subframe. The resource blocks belonging to the resource block pair occupy different subcarriers in the first slot and the second slot. The frequency occupied by the resource blocks belonging to the resource block pair allocated to the PUCCH is changed based on the slot boundary. It is assumed that the RB pair allocated to the PUCCH is frequency-hopped at the slot boundary.

The UE can obtain the frequency diversity gain by transmitting the uplink control information through different subcarriers over time. and m is a position index indicating the logical frequency domain position of the resource block pair allocated to the PUCCH in the subframe.

The uplink control information transmitted on the PUCCH includes a hybrid automatic repeat request (HARQ) acknowledgment / non-acknowledgment (NACK), a channel quality indicator (CQI) indicating a downlink channel state, (scheduling request).

The PUSCH is mapped to a UL-SCH, which is a transport channel. The uplink data transmitted on the PUSCH may be a transport block that is a data block for the UL-SCH transmitted during the TTI. The transport block may be user information. Alternatively, the uplink data may be multiplexed data. The multiplexed data may be a multiplexed transport block and control information for the UL-SCH. For example, the control information multiplexed on the data may include CQI, precoding matrix indicator (PMI), HARQ, and rank indicator (RI). Alternatively, the uplink data may be composed of only control information.

≪ Carrier Aggregation (CA) >

Now, the carrier aggregation system will be described.

A carrier aggregation system means aggregating a number of component carriers (CCs). This carrier aggregation changed the meaning of existing cells. According to carrier aggregation, a cell may refer to a combination of a downlink component carrier and an uplink component carrier, or a single downlink component carrier.

In the carrier aggregation, a cell may be classified into a primary cell, a secondary cell, and a serving cell. The primary cell refers to a cell operating at a primary frequency. The primary cell is a cell in which a UE performs an initial connection establishment procedure or a connection re-establishment process with a base station, Cell. A secondary cell is a cell operating at a secondary frequency, and once established, an RRC connection is established and used to provide additional radio resources.

A carrier aggregation system can be classified into a contiguous carrier aggregation system in which aggregated carriers are continuous and a non-contiguous carrier aggregation system in which aggregated carriers are separated from each other. Hereinafter, when it is simply referred to as a carrier aggregation system, it should be understood that this includes both continuous and discontinuous element carriers. The number of element carriers to be aggregated between the downlink and the uplink may be set differently. The case where the number of downlink CCs and the number of uplink CCs are the same is referred to as a symmetric aggregation, and the case where the number of downlink CCs is different is referred to as asymmetric aggregation.

On the other hand, the carrier aggregation technique can be divided into an inter-band CA and an intra-band CA technology. The inter-band CA is a method of aggregating and using CCs existing in different bands, and an intra-band CA is a method of aggregating and using CCs in the same frequency band. Further, the CA technology is described in more detail as follows: Intra-Band Contiguous CA, Intra-Band Non-Contiguous CA, and Inter-Band Discrete ( Non-Contiguous CA.

Figures 6a and 6b show Intra  band( intra -band) carrier  Showing the Carrier Aggregation (CA) It is a concept. .

FIG. 6A shows an intra-band contineous CA, and FIG. 6B shows an intra-band non-continguous CA.

In LTE-Advance, various techniques including uplink MIMO and Carrier Aggregation are added to achieve high-speed wireless transmission. The CA discussed in LTE-Advance can be divided into an intra-band Contiguous CA shown in FIG. 6A and an intra-band non-Contiguous CA shown in FIG. 6B .

Figures 7a and 7b show Inter  The band (inter-band) carrier  Show compromise It is a concept. .

FIG. 7A shows a combination of a low band and a high band for an interband CA, and FIG. 7B shows a combination of similar frequency bands for an interband CA.

That is, as shown in FIG. 7A, the interband carrier aggregation is performed by interleaving between low-band and high-band carriers having different RF characteristics of an inter-band CA. An inter-band CA with a similar frequency that can use a common RF terminal for each component carrier is similar to an inter-band CA as shown in FIG. 7B, . ≪ / RTI >

E-UTRA operation
Band (Operating Band) Uplink operating band
(Uplink (UL) operating band) Downlink operating band
Downlink (DL) operating band Duplex
mode
Duplex Mode F _{UL _ low} - F _{UL _high} F _{DL _ low} - F _{DL _high} One 1920 MHz - 1980 MHz 2110 MHz - 2170 MHz FDD 2 1850 MHz - 1910 MHz 1930 MHz - 1990 MHz FDD 3 1710 MHz - 1785 MHz 1805 MHz - 1880 MHz FDD 4 1710 MHz - 1755 MHz 2110 MHz - 2155 MHz FDD 5 824 MHz - 849 MHz 869 MHz - 894 MHz FDD 61 830 MHz - 840 MHz 875 MHz - 885 MHz FDD 7 2500 MHz - 2570 MHz 2620 MHz - 2690 MHz FDD 8 880 MHz - 915 MHz 925 MHz - 960 MHz FDD 9 1749.9 MHz - 1784.9 MHz 1844.9 MHz - 1879.9 MHz FDD 10 1710 MHz - 1770 MHz 2110 MHz - 2170 MHz FDD 11 1427.9 MHz - 1447.9 MHz 1475.9 MHz - 1495.9 MHz FDD 12 699 MHz - 716 MHz 729 MHz - 746 MHz FDD 13 777 MHz - 787 MHz 746 MHz - 756 MHz FDD 14 788 MHz - 798 MHz 758 MHz - 768 MHz FDD 15 Reserved Reserved FDD 16 Reserved Reserved FDD 17 704 MHz - 716 MHz 734 MHz - 746 MHz FDD 18 815 MHz - 830 MHz 860 MHz - 875 MHz FDD 19 830 MHz - 845 MHz 875 MHz - 890 MHz FDD 20 832 MHz - 862 MHz 791 MHz - 821 MHz FDD 21 1447.9 MHz - 1462.9 MHz 1495.9 MHz - 1510.9 MHz FDD 22 3410 MHz - 3490 MHz 3510 MHz - 3590 MHz FDD 23 2000 MHz - 2020 MHz 2180 MHz - 2200 MHz FDD 24 1626.5 MHz - 1660.5 MHz 1525 MHz - 1559 MHz FDD 25 1850 MHz - 1915 MHz 1930 MHz - 1995 MHz FDD 26 814 MHz - 849 MHz 859 MHz - 894 MHz FDD 27 807 MHz - 824 MHz 852 MHz - 869 MHz FDD 28 703 MHz - 748 MHz 758 MHz - 803 MHz FDD 29 Not applicable Not applicable 717 MHz - 728 MHz FDD 30 2305 MHz - 2315 MHz 2350 MHz - 2360 MHz FDD 31 452.5 MHz - 457.5 MHz 462.5 MHz - 467.5 MHz FDD 32 Not applicable Not applicable 1452 MHz - 1496 MHz FDD ... 33 1900 MHz - 1920 MHz 1900 MHz - 1920 MHz TDD 34 2010 MHz - 2025 MHz 2010 MHz - 2025 MHz TDD 35 1850 MHz - 1910 MHz 1850 MHz - 1910 MHz TDD 36 1930 MHz - 1990 MHz 1930 MHz - 1990 MHz TDD 37 1910 MHz - 1930 MHz 1910 MHz - 1930 MHz TDD 38 2570 MHz - 2620 MHz 2570 MHz - 2620 MHz TDD 39 1880 MHz - 1920 MHz 1880 MHz - 1920 MHz TDD 40 2300 MHz - 2400 MHz 2300 MHz - 2400 MHz TDD 41 2496 MHz 2690 MHz 2496 MHz 2690 MHz TDD 42 3400 MHz - 3600 MHz 3400 MHz - 3600 MHz TDD 43 3600 MHz - 3800 MHz 3600 MHz - 3800 MHz TDD 44 703 MHz - 803 MHz 703 MHz - 803 MHz TDD

When the operating band is fixed as shown in Table 2, the frequency allocation mechanism of each country can allocate a specific frequency to the service provider according to the situation of each country.

On the other hand, the intraband continuous CA band class and the corresponding guard band are shown in the following table.

CA Bandwidth Class Aggregated Transmission Bandwidth Configuration < RTI ID = 0.0 > Maximum number of CCs
(Maximum number of CC) Nominal Guard Band BW _GB A N _{RB, agg} ?? 100 One a1BW _{Channel (1)} -0.5Df1 (NOTE2) B N _{RB, agg} ?? 100 2 0.05 max (BW _{Channel (1),} BW _{Channel (2)} ) - 0.5Df1 C 100 < N _{RB, agg &lt;} = 200 2 0.05 max (BW _{Channel (1)} , BW _{Channel (2)} ) - 0.5Df1 D 200 < N _{RB, agg &lt;} = 300 FFS 0.05 max (BW _{Channel (1)} , BW _{Channel (2)} ) - 0.5Df1 E [300] < N _{RB, agg} ?? [400] FFS FFS F [400] < N _{RB, agg} ?? [500] FFS FFS NOTE1: BW _{Channel (j),} j = 1,2,3, is the channel frequency bandwidth of the E-UTRA element carrier defined in TS36.101 table 5.6-1, Df1 denotes the subcarrier spacing of the downlink Df, Df1 = 0 in the downlink.
NOTE2: a1 = 0.16 / 1.4 when the channel frequency bandwidth is 1.4MHz and a1 = 0.05 in the remaining frequency band.

Square brackets [] in the above table indicate that they have not been defined yet and can be changed. FFS stands for For Further Study. N _RB _ _agg is the number of RBs aggregated in the aggregation channel band.

Table 4 below shows a set of Bandwidths corresponding to each Intra-band continuous CA Configuration.

E-UTRA CA configuration / Bandwidth combination set E-UTRA CA configuration The channel frequency bandwidth allowed by each carrier The channel frequency bandwidth allowed by each carrier  The channel frequency bandwidth allowed by each carrier Maximum aggregated bandwidth
[MHz] Bandwidth Combination Set CA_1C 15 15 40 0 20 20 CA_3C 5,10,15 20 40 0 20 5,10,15,20 CA_7C 15 15 40 0 20 20 10 20 40 One 15 15,20 20 10,15,20 CA_23B 10 10 20 0 5 15 CA_27B 1.4, 3, 5 5 13 0 1.4, 3 10 CA_38C 15 15 40 0 20 20 CA_39C 5,10,15 20 35 0 20 5, 10, 15 CA_40C 10 20 40 0 15 15 20 10, 20 CA_41C 10 20 40 0 15 15, 20 20 10, 15, 20 5, 10 20 40 One 15 15, 20 20 5, 10, 15, 20 CA_40D 10, 20 20 20 60 0 20 10 20 20 20 10 CA_41D 10 20 15 60 0 10 15, 20 20 15 20 10, 15 15 10, 15, 20 20 20 15, 20 10 20 10, 15, 20 15, 20 CA_42C 5, 10, 15, 20 20 5, 10, 15, 20 40 0 20 5, 10, 15 20

In the table above, the CA configuration represents the operating band and the CA bandwidth class. For example, CA_1C refers to operating band 2 of Table 2 and CA band class C of Table 3. For all bands not shown in the table above, all CA action classes may be applied. In Rel-12, Class D is added as shown in the above table, so that up to three carriers can be simultaneously transmitted from intra-band consecutive CAs.

Degree 8 is  Adjacent to filter during transmission Give to channel  To minimize the effects of wanted signals and self-transmissions Non-band  Fig. 9 is a graphical representation of the concept of unwanted emission, and Fig. 9 is a graphical representation of the unwanted emission in the out-of-band, Unnecessary radiation  Specification of Specification And , Fig. 10 is a cross-sectional view Band (MHz) and resource  block( RB ).

As can be seen with reference to FIG. 8, any transmitting modem transmits signals on the allocated channel bandwidth within any E-UTRA band.

Here, the channel bandwidth is defined, as can be seen with reference to FIG. That is, the transmission bandwidth is set smaller than the channel bandwidth (BW _Channel ). The transmission bandwidth setting is performed by a plurality of resource blocks (RBs). And the channel outline is the highest and lowest frequency separated by the channel bandwidth.

Meanwhile, as described above, the 3GPP LTE system supports 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz and 20 MHz as channel bandwidths. The relationship between the channel bandwidth and the number of resource blocks is shown in the following table.

Channel Bandwidth BW _Channel [MHz] 1.4 3 5 10 15 20 Transmission bandwidth setting N _RB 6 15 25 50 75 100

Referring again to FIG. 8, spurious emission occurs in the band of? F _OOB , and also spurious emission occurs in the spurious domain as shown. Here,? F _OOB means the frequency of the Out Of Band (OOB), and is shown in the following table.

Channel bandwidth 1.4
MHz 3.0
MHz 5
MHz 10
MHz 15
MHz 20
MHz Outer band boundary
F _OOB (MHz) 2.8 6 10 15 20 25

On the other hand, the emission on the out-of-band refers to the occurrence in the band adjacent to the intended transmission band. Spurious radiation refers to the emission of unwanted waves in the frequency range farther than the outer band from the intended transmission band.

Meanwhile, 3GPP Release 8 defines a basic spurious emission (SE) that should not be minimized according to a frequency range when an LTE terminal transmits, and in Release 10, when an LTE-A terminal supporting a CA transmits The applicable SE specification was further defined.

9, when transmission is performed in the E-UTRA channel band 1301, leakage is performed to the outer bands (1302, 1303, and 1304 in the illustrated _fOOB area), that is, unwanted radiation.

Herein, the illustrated UTRA _ACLR1 indicates that when the UE transmits on the E-UTRA channel 1301 and the UTRA terminal needs to protect the UTRA terminal in the immediately adjacent channel 1302, the UTRA ACLR1 leaks to the adjacent channel 1302, That is, constrained specifications for adjacent channel leakage equipment. 13, when the UTRA terminal needs to protect a UTRA terminal in a channel 1303 located next to an adjacent channel 1302, the UTRA _ACLR2 is a ratio of the leakage rate to the adjacent channel 1303, i.e., the UTRA channel 2 That is, adjacent channel leakage equipment. As shown in FIG. 9, the E-UTRA _ACLR is configured such that when the UE transmits on the E-UTRA channel 1301, the adjacent channel 1304 that is the same as the channel bandwidth of the E-UTRA in the immediately adjacent frequency domain, The ratio of leakage to the E-UTRA channel, that is, adjacent channel leakage facility constraint specifications.

As described above, if transmission is performed in the allocated channel band, unnecessary radiation occurs in adjacent channels.

As described, unwanted emissions occur in adjacent bands by wireless transmission. In this case, the interference due to radiation due to the base station transmission can be reduced to below the allowable level due to the characteristics of the base station and the amount of interference introduced into the adjacent band by designing a large-sized RF filter or the like. On the other hand, in the case of a terminal, it is difficult to completely prevent entry into the adjacent band due to limitations of the terminal size, price limit for a power amplifier or a pre-duplex filter RF device.

Therefore, it is necessary to limit the transmission power of the terminal.

The maximum power (Pcmax) actually available to the UE in the LTE system is simply expressed as follows.

Here, Pcmax denotes the maximum power (actual maximum transmission power) that the UE can transmit in the corresponding cell, and Pemax denotes the maximum power that can be used in the corresponding cell to which the base station signals. Pumax refers to the power considering the maximum power reduction (MPR) and the additive-MPR (A-MPR) to the maximum power (P _PowerClass ) of the terminal itself.

The maximum power (P _PowerClass ) of the terminal itself is shown in the following table.

Operating band Power Class 1 (dBm) Power Class 3 (dBm) 12, 13, 14, 17, 18, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 30, 31, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44 23dBm 14 31 dBm

On the other hand, in the case of intra-band-continuous CA, the maximum power (P _PowerClass ) of the terminal itself is as shown in the following table.

Operating band Power Class 3 (dBm) CA_1C 23dBm CA_3C 23dBm CA_7C 23dBm CA_38C 23dBm CA_39C 23dBm CA_40C 23dBm CA_41C 23dBm CA_42C 23dBm

11 shows a method of limiting transmission power of a terminal It is also an example .

As can be seen from FIG. 11 (a), the terminal 100 performs transmission by limiting transmission power.

The maximum power reduction (MPR) value to limit the transmission strategy degrades the linearity of the power amplifier (PA) when the PAPR (Peak-to-Average Power Ratio) is large. In order to maintain this linearity, the MPR value of up to 2dB can be applied according to the modulation method.

< 3GPP release  11 MPR >

Meanwhile, according to 3GPP Release 11, a multi-clustered transmission is adopted in a single CC (Component Carrier), and a PUSCH and a PUCCH can be simultaneously transmitted. As described above, when the PUSCH and the PUCCH are simultaneously transmitted, the size of the IM3 component (meaning a distortion signal generated due to intermodulation) occurring in the out-of-band region can be increased compared to the conventional one (SE), an Adjacent Channel Leakage (ACLR), which is the emission requirements of the UE to be uplinked to the UE, Ratio) and a general spectral emission mask (SEM: Spectrum Emission Mask).

<A- MPR >

As can be seen from FIG. 11 (b), the base station can transmit the network signal NS to the terminal 100 and apply the A-MPR (Additional Maximum Power Reduction). Unlike the above-mentioned MPR, the A-MPR transmits a network signal NS to a terminal 100 operating in a specific operating band in order to avoid interference and the like to adjacent bands, Thereby further performing power reduction. That is, when the terminal receiving the MPR receives the network signal NS, the transmission power is further determined by applying the A-MPR.

The table below shows the values of A-MPR according to network signals.

Network Signaling value Channel bandwidth (MHz) Resources Blocks (NRB) A-MPR (dB) NS_01 1.4, 3, 5, 10, 15, 20 Undefined NS_03 3 > 5 ≤ ≤ 1 5 > 6 ≤ ≤ 1 10 > 6 ≤ ≤ 1 15 > 8 ≤ ≤ 1 20 > 10 ≤ ≤ 1 NS_04 5 > 6 ≤ ≤ 1 NS_05 10,15,20 ≥≥50 ≤ 1 NS_06 1.4, 3, 5, 10 - Undefined NS_07 10 Shown in Table 9 NS_08 10, 15 > 44 ≤ ≤ 3 NS_09 10, 15 > 40 ≤ ≤ 1 > 55 ≤ ≤ 2 NS_18 5 ≥≥2 ≤ ≤ 1 10, 15, 20 ≥ 1 ≤ ≤ 4

The following table shows the A-MPR values when the network signal is NS_07.

parameter Regione Region B Region C RB _start 0 - 12 13 - 18 19 - 42 43 - 49 L _CRB [RBs] 6-8 1-5, 9-50 ≥≥8 ≥≥18 ≤ ≤ 2  A-MPR [dB] ≤ ≤ 8 ≤ ≤ 12 ≤ ≤ 12 ≤ ≤ 6 ≤ ≤ 3

In the above table, RB _start represents the lowest RB index of the transmitted RB. And L _CRB represents the length of consecutive RB allocations.

For example, if a terminal receiving a service using a 10-MHz channel bandwidth in band 13 receives NS_07 as a network signal, the terminal determines and transmits the transmission power according to the table above. That is, when the uplink grant received by the UE is decoded and the RB start position is instructed to continuously transmit 5 RBs at the 10th RB, the UE applies the A-MPR value at a maximum of 12 dB .

&Lt; A- MPR >

On the other hand, considering the CA, the channel bandwidth of the uplink can be increased up to 40 MHz (20 MHz + 20 MHz), and SEM / ACLR / SE a and Public Safety standards The A-MPR value and the CA_NS_XX for the additional CA are standardized. That is, when a base station transmits a network signal to a mobile station in order to protect a specific band in a CA environment, Power reduction can be performed to protect adjacent bands.

On the other hand, up to now, studies have been conducted on required MPR and A-MPR in a situation where up to two downlink carriers are aggregated. However, the situation of aggregating three downlink carriers and two uplink carriers has not been studied to date. Therefore, a description will be given below.

&Lt; Integration of three downlink carriers and two uplink carriers >

Hereinafter, when the UE transmits an uplink signal through two uplink carriers in an aggregation state of three downlink carriers and two uplink carriers, after analyzing whether the interference is leaked in its own downlink band, Provide a solution.

More specifically, when a mobile station transmits an uplink signal through two uplink carriers, a harmonic component and an intermodulation distortion (IMD) component are introduced into a downlink band of the mobile station, We propose a scheme to prevent the reception sensitivity from dropping. In addition, even if the terminal appropriately solves this problem, the reception sensitivity level in the downlink band can not be completely prevented due to the cross isolation and the coupling loss due to the PCB, Suggests ways to mitigate the requirements that must be met.

Specifically, it is as follows.

Firstly, research has been carried out to find out what combination of three downlink carriers and two uplink carriers can aggregate. The table below shows the following.

Carrier aggregation Combinations of downlink carrier bands Combination of uplink carrier bands frequency Carrier aggregation of FDD + TDD 2UL / 3DL
Inter-band CA B1 + B3 + B5 B1 + B3 (High-High)
B1 + B5 (Low-High)
B3 + B5 (Low-High) 2.1G + 1.8G + 800M X B1 + B3 + B8 B1 + B3 (High-High)
B1 + B8 (Low-High)
B3 + B8 (Low-High) 2.1G + 1.8G + 900M X B1 + B3 + B19 B1 + B3 (High-High)
B1 + B19 (Low-High)
B3 + B19 (Low-High) 2.1G + 1.8G + 800M X B1 + B5 + B7 B1 + B5 (Low-High)
B1 + B7 (High-High)
B5 + B7 (Low-High) 2.1G + 800M + 2.6G X B1 + B18 + B28 B1 + B18 (Low-High)
B1 + B28 (Low-High)
B18 + B28 (Low-Low) 2.1G + 800M + 700M X B1 + B19 + B21 B1 + B19 (Low-High)
B1 + B21 (Mid-High)
B19 + B21 (Low-Mid) 2.1G + 800M + 1.5G X B2 + B4 + B12 B2 + B4 (High-High)
B4 + B12 (Low-High) 1.9G + 2.1G + 700M X B2 + B5 + B13 B2 + B13 (Low-High) 1.9G + 800M + 700M X B3 + B7 + B20 B3 + B7 (High-High)
B3 + B20 (Low-High)
B7 + B20 (Low-High) 1.8G + 2.6G + 800M X B4 + B5 + B13 B4 + B13 (Low-High) 2.1G + 800M + 700M X B3 + B7 + B28 B3 + B7 (High-High)
B7 + B28 (Low-High) 1.8G + 2.6G + 700M X 2UL / 3DL mixed intra / inter-bandce B3 + B3 + B7 B3 + B3 (High-High)
B3 + B7 (High-High) 1.8G + 1.8G + 2.6G X B3 + B7 + B7 B3 + B7 (High-High)
B7 + B7 (High-High) 1.8G + 2.6G + 2.6G X B25 + B41 + B41 B41 + B41 (High-High) 1.9G + 2.6G + 2.6G O

In the case where the UE transmits the uplink signal through two uplink carriers according to the above combinations, a study has been made on whether a harmonic component and an IMD component are generated and interference occurs in the downlink band of the UE. The results are shown in the table below.

Setting of downlink carrier aggregation Setting up uplink carrier aggregation When there is no uplink, the harmonic component for the third band When there is no uplink, the IMD component for the third band Interference when band-to-band spacing is small MSD CA_1A-3A-5A CA_1A-3A - - - Not applicable CA_1A-5A - - yes CA_1A-5A already covered in 2DL / 2UL CA
Refer to document TS 36.101 CA_3A-5A - - - Not applicable CA_1A-3A-8A CA_1A-3A - - - Not applicable CA_1A-8A Second harmonic component - yes CA_1A-8A in 1UL / 2DL already covered
Refer to document TS 36.101 CA_3A-8A - - - Not applicable CA_1A-3A-19A CA_1A-3A - - - Not applicable CA_1A-19A - - yes Adjacent interference problem already handled in CA_1A-3A
Refer to document TS 36.101 CA_3A-19A - - - Not applicable CA_1A-5A-7A CA_1A-5A - - - Not applicable CA_1A-7A - The fifth IMD component - IMD component problem CA_5A-7A - - - Not applicable CA_1A-18A-28A CA_1A-18A - - yes Adjacent interference problem is already covered in CA_18A-28A
Refer to document TS 36.101 CA_1A-28A - The fifth IMD component - 5th IMD generation but not considering carrier's specific frequency CA_18A-28A B28 3rd harmonic The fifth IMD component - 3rd harmonic and 5th IMD occur but not when considering carrier's specific frequency CA_1A-19A-21A CA_1A-19A - - - Not applicable CA_1A-21A - - - Not applicable CA_19A-21A - - - Not applicable CA_2A-4A-12A CA_2A-4A, - - - Not applicable CA_4A-12A - Fourth IMD component - There is not a lot of band that IMD influences. CA_2A-5A-13A CA_2A-13A - - - Not applicable CA_3A-7A-20A CA_3A-7A - The secondary IMD component - IMD component problem CA_3A-20A - The secondary IMD component - IMD component problem CA_7A-20A - - - Not applicable CA_4A-5A-13A CA_4A-13A - - - Not applicable CA_3A-7A-28A CA_3A-7A The secondary IMD component IMD component problem CA_7A-28A The secondary IMD component IMD component problem CA_3A-7C CA_3A-7A Fourth IMD component - CA_3A-7A already covered in 2DL / 2UL CA
Refer to document TS 36.101 CA_7C - Not applicable CA_3C-7A CA_3A-7A Fourth IMD component - CA_3A-7A already covered in 2DL / 2UL CA
Refer to document TS 36.101 CA_3C - Not applicable CA_25A-41C CA_41C - Not applicable

As shown in the above table, when the uplink signal is transmitted through two uplink carriers, it is analyzed that the IMD components are generated in total of 5 combinations.

As a method for preventing the generation of the IMD component, a filter may be added to remove the frequency at which the IMD component or the harmonic component occurs at each transmission end.

However, even if the filter is added in this way, the size of the IMD component or the harmonic component introduced into the downlink band of the UE itself is merely reduced to some extent, and the actual influence can not be completely eliminated.

Therefore, the disclosure of the present disclosure analyzes the measured value for the IMD component occurring in each nonlinear element and analyzes whether the magnitude of the corresponding IMD component changes when passing through each of the elements, Study how the level drops. Also, the present invention proposes a method for mitigating the requirement that the UE must meet the reference sensitivity (REFSENS) through the lowering of the received sensitivity level.

The conditions used in the reception sensitivity level study are as follows.

Downlink carrier wave aggregation Uplink carrier aggregation IMD component Upper leak center frequency F _c
(MHz) Uplink bandwidth (MHz) Uplink
Number of RBs Third downlink bandwidth center frequency
F _c (MHz) Downlink bandwidth (MHz) CF (dB) B1 + B5 + B7 B1 IMD5 3 * f _B1 - 2 * f _B7 1968 5 25 880 5 4.37 B7 2512 10 50 B3 + B7 + B20 B3 IMD2 f _B7 - f _B3 1737 5 25 806 5 2.63 B7 2543 10 50 B3 IMD2 f _B3 + f _B20 1775 10 50 2630 10 0.29 B20 855 5 25 B3 IMD3 2 * f _B3 - f _B20 1750 10 50 2653 10 1.20 B20 847 5 25 B3 + B7 + B28 B3 IMD2 f _B7 - f _B3 1747 5 25 796.0 5 1.24 B7 2543 5 25 B3 IMD3 2 * f _B3 - f _B28 1712.5 5 25 2679.5 5 1.55 B28 745.5 5 25 B7 IMD2 f _B7 - f _B28 2543 5 25 1832.5 5 0.84 B28 710.5 5 25

In the above table, the center frequency of the uplink carrier is set so that the harmonic component and the IMD component are introduced into the downlink band of the terminal itself. In this case, the MSD (Maximum Sensitivity Degradation) .

In addition, the center frequency Fc of the downlink carrier is likewise determined in the region where the IMD component occurs. The CF (correction factor) is a correction factor for obtaining the MSD for separately applying the difference between the total power of the IMD component and the power of the IMD component that affects the actual bandwidth of the modulated signal, And used.

In this way, a reference architecture is required to measure the change in the magnitude of the signal at the input / output of each device according to the MSD simulation and the device characteristics according to the IMD component and the harmonic component, MSD values are derived by determining whether to use a cascaded Diplexer, a Triplexer, a Quadplexer, a Hexaplexer and an additional filter, for example.

12 shows an example of an RF architecture that can be used for aggregation of three downlink carriers and two uplink carriers.

The RF architecture shown in FIG. 12 is a structure that can be used for aggregation of three downlink carriers and two uplink carriers, and may include various elements such as a diplexer, a duplexer, a quadruplexer, a hexaplexer, have.

The output variations of the input signals of switches and diplexers, diplexers, duplexers, quadruplexers, hexaplasters, low noise amplifiers (LNAs) used in these architectures and input / output of PAs The measured data of the change in signal strength are as follows.

Reference architecture Cascade Diplexer Architecture Quad-plexer architecture carrier B1 + B5 + B7 & B1 + B7
B3 + B7 + B20 & B3 + B7
B3 + B7 + B20 & B3 + B20
B3 + B7 + B28 & B3 + B7
B3 + B7 + B28 & B3 + B28
B3 + B7 + B28 & B7 + B28 B1 + B3 + BX & B1 + B3 IP2 (dBm) IP3 (dBm) IP4 (dBm) IP5 (dBm) IP2 (dBm) IP3 (dBm) IP4 (dBm) IP5 (dBm) Antenna switch 112 68 55 55 112 68 55 55 Dippler (L + H) 115 87 55 55 - - - - Diprepar (H + H) 110 85 55 55 110 85 55 55 Quadruplex - - - - 110 72 55 52 Duplexer 100 75 55 53 100 75 55 53 PA Forward 28.5 32 30 28 28.5 32 30 28 PA Reversed 40 30.5 30 30 40 30.5 30 30 LNA 10 0 0 -10 10 0 0 -10

In addition, the isolation characteristics of the RF devices are summarized as shown in the following table.

Isolation parameter Value (dB) device Antenna to antenna 10 Main antenna vs. diversity antenna PA (out) vs. PA (in) 60 PCB isolation (PA forward mixing) Diplexer 15 High (H) / Low (L) Band Isolation Diplexer 10 High (H) / High (H) band isolation PA (out) vs. PA (out) 60 L-H / H-L cross band (diplexer + duplexer) PA (out) vs. PA (out) 50 H-H cross band (diplexer + diplexer) LNA (in) to PA (out) 60 L-H / H-L cross band (diplexer + diplexer) LNA (in) to PA (out) 50 H-H cross band (diplexer + diplexer) Duplexer 50 Rejection of the Tx band in the Rx band,

Using the measurement data and isolation characteristics of these devices, the output IMD value is obtained according to the following equation as the relaxation value for the reception sensitivity level predicted according to the IMD component.

이며, P1 과 P2는 각 소자의 입력 파워를 나타낸다.here

And P1 and P2 represent the input power of each element.

이며, P1 과 P2는 각 소자의 입력 파워를 나타낸다.here

And P1 and P2 represent the input power of each element.

이며, P1 과 P2는 각 소자의 입력 파워를 나타낸다.here

And P1 and P2 represent the input power of each element.

이며, P1 과 P2는 각 소자의 입력 파워를 나타낸다.here

And P1 and P2 represent the input power of each element.

The maximum sensitivity degradation (MSD) value predicted according to this is proposed as shown in the following table.

Downlink carrier wave aggregation Uplink carrier aggregation IMD Uplink center frequency
Fc (MHz) Uplink
Bandwidth
(MHz) Uplink RB count The center frequency of the third downlink
Fc (MHz) Downlink
Bandwidth
(MHz) CF
(dB) MSD
(dB) B1 + B5 + B7 B1 IMD5 3 * f _B1 - 2 * f _B7 1968 5 25 880 5 4.37 0.22 B7 2512 10 50 B3 + B7 + B20 B3 IMD2 f _B7 - f _B3 1737 5 25 806 5 2.63 22.0 B7 2543 10 50 B3 IMD2 f _B3 + f _B20 1775 10 50 2630 10 0.29 22.7 B20 855 5 25 B3 IMD3 2 * f _B3 - f _B20 1750 10 50 2653 10 1.20 1.8 B20 847 5 25 B3 + B7 + B28 B3 IMD2 f _B7 - f _B3 1747 5 25 796.0 5 1.24 18.7 B7 2543 5 25 B3 IMD3 2 * f _B3 - f _B28 1712.5 5 25 2679.5 5 1.55 13.4 B28 745.5 5 25 B7 IMD2 f _B7 - f _B28 2543 5 25 1832.5 5 0.84 25.6 B28 710.5 5 25

If the MSD presented in the above table is reflected in TS36.101, the first decimal point shall be rounded off as follows.

E-UTRA Bandwidth / Channel Bandwidth / Number of _RBs (N _RB ) / Duplex Mode Configuration of downlink carrier wave aggregation Configuration of uplink carrier aggregation EUTRA band UL center frequency Fc
(MHz) UL bandwidth
(MHz) UL C _LRB The center frequency Fc of the third downlink carrier (MHz) Lower link bandwidth
(MHz) MSD
(dB) Duplex
mode CA_1A-5A-7A CA_1A-7A One 1968 5 25 880 5 0.0 FDD 7 2512 10 50 CA_3A-7A-20A CA_3A-7A 3 1737 5 25 806 10 22.0 FDD 7 2543 10 50 CA_3A-20A 3 1775 10 50 2630 10 23.0 FDD 20 855 5 25 CA_3A-7A-28A CA_3A-7A 3 1747 5 25 796.0 5 19.0 FDD 7 2543 5 25 CA_3A-28A 3 1712.5 5 25 2679.5 5 13.0 FDD 28 745.5 5 25 CA_7A-28A 7 2543 5 25 1832.5 5 26.0 FDD 28 710.5 5 25

The embodiments of the present invention described above can be implemented by various means. For example, embodiments of the present invention may be implemented by hardware, firmware, software, or a combination thereof. More specifically, it will be described with reference to the drawings.

13 illustrates a wireless communication system in which the present disclosure is implemented; It is a block diagram. .

The base station 200 includes a processor 210, a memory 220 and an RF unit (radio frequency (RF) unit 230). The memory 220 is connected to the processor 210 and stores various information for driving the processor 210. The RF unit 230 is connected to the processor 210 to transmit and / or receive a radio signal. Processor 210 implements the proposed functionality, process and / or method. The operation of the base station in the above-described embodiment may be implemented by the processor 210. [

The UE 100 includes a processor 110, a memory 120, and an RF unit 130. The memory 120 is connected to the processor 110 and stores various information for driving the processor 110. [ The RF unit 130 is connected to the processor 110 to transmit and / or receive a radio signal. The processor 110 implements the proposed functions, processes and / or methods.

The processor may comprise an application-specific integrated circuit (ASIC), other chipset, logic circuitry and / or a data processing device. The memory may include read-only memory (ROM), random access memory (RAM), flash memory, memory cards, storage media, and / or other storage devices. The RF unit may include a baseband circuit for processing the radio signal. When the embodiment is implemented in software, the above-described techniques may be implemented with modules (processes, functions, and so on) that perform the functions described above. The module is stored in memory and can be executed by the processor. The memory may be internal or external to the processor and may be coupled to the processor by any of a variety of well known means.

In the above-described exemplary system, the methods are described on the basis of a flowchart as a series of steps or blocks, but the present invention is not limited to the order of the steps, and some steps may occur in different orders . It will also be understood by those skilled in the art that the steps shown in the flowchart are not exclusive and that other steps may be included or that one or more steps in the flowchart may be deleted without affecting the scope of the invention.

Claims (8)

A signal transmission / reception method in a carrier aggregation,
Transmitting uplink signals using the two uplink carriers when aggregating three downlink carriers and aggregating two uplink carriers, wherein the downlink carriers are Evolved Universal Terrestrial (E-UTRA) Radio Access) operating bands 1, 3, 5, 7, and 20, wherein the uplink carriers comprise two;
And receiving a downlink signal through all of the three downlink carriers,
Here, when the center frequency of the first uplink carrier of the uplink carriers corresponds to a first value and the center frequency of the second uplink carrier corresponds to a second value, a third downlink subcarrier When the center frequency of the link carrier belongs to the third value, MSD (Maximum Sensitivity Degradation) preset for the reference sensitivity of the downlink signal is applied and the reception is successful. The method according to claim 1,
Wherein the three downlink carriers are E-UTRA bands 1, 5 and 7, the two uplink carriers are E-UTRA bands 1 and 7, and the center frequency of the first uplink carrier is 1968 MHz And the MSD value is 0.22 dB or 0 dB when the center frequency of the second uplink carrier corresponds to 2512 MHz and the center frequency of the third downlink carrier corresponds to 880 MHz. 3. The method of claim 2,
When the number of RBs of the first uplink carrier is 25 and the number of RBs of the second uplink carrier is 50, the MSD value in the third downlink band is 0.22 dB or 0 dB Lt; / RTI &gt; The method according to claim 1,
UTRA bands 3, 5 and 7, the two uplink carriers are E-UTRA bands 3 and 7, and the center frequency of the first uplink carrier is at 1737 MHz And the MSD value is 22 dB when the center frequency of the second uplink carrier corresponds to 2543 MHz and the center frequency of the third downlink carrier corresponds to 806 MHz. 5. The method of claim 4,
When the number of RBs of the first uplink carrier is 25 and the number of RBs of the second uplink carrier is 50, the MSD value in the third downlink band is 22 dB. Way. The method according to claim 1,
UTRA bands 3, 5 and 7, the two uplink carriers are E-UTRA bands 3 and 20, and the center frequency of the first uplink carrier is at 1775 MHz And the MSD value is 23 dB when the center frequency of the second uplink carrier corresponds to 885 MHz and the center frequency of the third downlink carrier corresponds to 2630 MHz. The method according to claim 6,
When the number of RBs of the first uplink carrier is 50 and the number of RBs of the second uplink carrier is 25, the MSD value in the third downlink band is 23 dB. Way.
A terminal for transmitting and receiving signals in a carrier aggregation,
A transmitter for transmitting uplink signals using the two uplink carriers when aggregating three downlink carriers and aggregating two uplink carriers, wherein the downlink carriers are Evolved Universal Terrestrial (E-UTRA) Radio Access) operating bands 1, 3, 5, 7, and 20, wherein the uplink carriers comprise two;
A receiver for receiving a downlink signal through all of the three downlink carriers;
When a center frequency of a first uplink carrier of the uplink carriers corresponds to a first value and a center frequency of a second uplink carrier corresponds to a second value, a third downlink carrier of the downlink carriers (MSD) to the reference sensitivity of the downlink signal when the center frequency of the downlink signal belongs to the third value, and successively receiving the MSD (Maximum Sensitivity Degradation) .

Images