KR20150045987A - Method for generating sounding reference signal, method for sending uplink and base station device - Google Patents

Abstract

The present invention provides a method for generating a sounding reference signal, a method for transmitting an uplink, and a base station device. The method for generating a sounding reference signal refers to a method for generating a sounding reference signal in a terminal, and the method includes: a step for receiving sequence information from a serving base station; and a step for generating a first sounding reference signal independent from the sequence used for uplink data and a control channel using the sequence information.

Description

METHOD FOR GENERATING SOUNDING REFERENCE SIGNAL, METHOD FOR SENDING UPLINK AND BASE STATION DEVICE,

The present invention relates to a method for generating a sounding reference signal, an uplink transmission method, and a base station.

Conventional communication base stations include a digital signal processing unit and a radio signal processing unit together in one physical system. However, such a system has a limitation in optimization of the cell design because the base station including all the processing units must be installed in the cell. To improve this, a plurality of antennas are connected to a single base station, and cells are formed in a required manner to reduce a coverage hole.

However, this approach allows efficient cell design, but it is difficult to maximize system capacity. Therefore, unlike the existing base station system, the proposed CCC (Cloud Communication Center) requires a digital signal processing unit (DU) and a radio signal of the base station in order to maximize the radio capacity. The wireless signal processing unit (RU) for transmitting / receiving is separated from the central office, and the RU is a wireless network technology installed in the service area. In such an environment, the UE may be located within the coverage of several RUs, or may move coverage of several RUs and may also be served by the RUs at the cell edge of several RUs. That is, the coverage of the downlink transmission signal transmitted by the RU and the coverage of the uplink, which the terminal should transmit to the RU, can be changed while the terminal is located or moving.

That is, the geometry of the downlink of the UE and the geometry of the uplink may be different, and uplink transmission to an RU other than the RU receiving the data channel and the control channel in the downlink received from the specific RU may be possible .

Also, the case may be similar in a heterogeneous network where macro cell deployment and various small cell deployment are considered. That is, when the coverage of the macro cell and the coverage of the small cell are different and the UE receiving the downlink data and control channel transmitted from the macro cell transmits the uplink data and control channel to the small cell coverage with better geometry for the uplink .

However, according to the conventional technique, a reference signal transmitted by a terminal belonging to a certain base station can be received only by an arbitrary base station. The other base station can not receive the reference signal because it can not know the information for generating the reference signal transmitted by the corresponding base station. Here, reception does not mean that the reference signal is received by interference but means that the reference signal is received as a desired signal in accordance with the purpose of the signal transmitted by the terminal.

In addition, a terminal receiving a parameter transmitted from an arbitrary base station generates reference signals based on the parameters transmitted from the corresponding base station when generating the related demodulation reference signal and the periodic / aperiodic sounding reference signal, It is possible to transmit only the downlink and the linked uplink from the base station to which it belongs, and it is impossible to transmit to the uplink without downlink and linkage.

That is, a terminal belonging to the base station, that has received the downlink control channel through the base station, does not perform uplink data transmission to the base station and transmits the uplink channel quality to the base station with better geometry and quality Can not support.

In addition, when the UE transmits a sounding reference signal, it can not distinguish between a sounding reference signal transmitted to the serving base station and a sounding reference signal transmitted to another base station.

SUMMARY OF THE INVENTION The present invention provides a method for generating a sounding reference signal, an uplink transmission method, and a base station for distinguishing sounding reference signals transmitted to different base stations.

According to an aspect of the present invention, there is provided a method of generating a sounding reference signal,

A method of generating a sounding reference signal of a terminal, the method comprising: receiving sequence information from a serving base station; And generating a first sounding reference signal independent of the sequence used for the uplink data and the control channel using the sequence information.

The generating of the first sounding reference signal may include:

And setting a sequence group index and a sequence index of the first sounding reference signal from the sequence information.

The receiving step may further include:

Receiving RRC configuration parameters from the serving base station; And confirming the sequence information included in the AAL seed configuration information,

Wherein the generating comprises:

And generating the first sounding reference signal according to the sequence information included in the AAL cue configuration information.

The receiving step may further include:

Receiving a physical downlink control channel; And confirming the sequence information included in the physical downlink control channel,

Wherein the generating comprises:

And generating the first sounding reference signal according to the sequence information included in the physical downlink control channel.

The receiving step may further include:

Receiving a physical downlink control channel; And confirming the indication information included in the physical downlink control channel,

Wherein the generating comprises:

Setting sequence information of the first sounding reference signal according to the instruction information; And generating the first sounding reference signal according to the sequence information.

In addition,

And a 1-bit dynamic indication message indicating a radio resource control signaling parameter for the pre-defined sequence information through radio resource control signaling.

The step of confirming the instruction information may include:

Performing blind decoding on the physical downlink control channel in a terminal dedicated search space; And searching for an uplink grant or a downlink grant including the indication information in the terminal dedicated search space.

In addition, the first sounding reference signal may include:

A first periodic sounding reference signal generated according to the same sequence information, and a first aperiodic sounding reference signal.

In addition, the first sounding reference signal may include:

And may include a first cyclic sounding reference signal and a first aperiodic sounding reference signal generated according to the sequence information independent of each other.

Also, the first sounding reference signal may be transmitted to a base station other than the serving base station.

The method may further include generating a second sounding reference signal using a sequence used for the uplink data and the control channel,

The second sounding reference signal may be transmitted to the serving base station.

According to another aspect of the present invention, there is provided an uplink transmission method,

A method for uplink transmission of a terminal,

Transmitting a first sounding reference signal to a serving base station; And transmitting a second sounding reference signal to a neighboring base station,

Wherein the first sounding reference signal is used for the uplink channel estimation by the serving base station and the second sounding reference signal is used for the uplink channel estimation by the neighboring base station, The first sounding reference signal and the second sounding reference signal are generated according to sequence information and configuration information that are independent of each other.

Generating a first cyclic sounding reference signal and a first aperiodic sounding reference signal to be transmitted to the serving BS according to independent first sequence information set from the serving base station; And generating a second cyclic sounding reference signal and a second aperiodic sounding reference signal to be transmitted to the neighbor base station according to second sequence information independent of each other set from the serving base station.

Generating a first periodic sounding reference signal and a first aperiodic sounding reference signal to be transmitted to the serving BS according to independent first configuration information set by the serving base station; And generating a second cyclic sounding reference signal and a second aperiodic sounding reference signal to be transmitted to the neighbor base station according to second independent configuration information set from the serving base station.

Generating a first cyclic sounding reference signal and a first aperiodic sounding reference signal to be transmitted to the serving BS according to first identical configuration information set from the serving base station; And generating a second cyclic sounding reference signal and a second aperiodic sounding reference signal to be transmitted to the neighbor base station according to second independent configuration information set from the serving base station.

Generating a first cyclic sounding reference signal and a first aperiodic sounding reference signal to be transmitted to the serving BS according to first identical configuration information set from the serving base station; And generating a second cyclic sounding reference signal and a second aperiodic sounding reference signal to be transmitted to the neighbor base station according to second configuration information identical to each other set from the serving base station.

Generating a first periodic sounding reference signal and a first aperiodic sounding reference signal to be transmitted to the serving BS according to independent first configuration information set by the serving base station; And generating a second cyclic sounding reference signal and a second aperiodic sounding reference signal to be transmitted to the neighbor base station according to second configuration information identical to each other set from the serving base station.

In addition,

Cell specific parameters, and radio resource control parameters including terminal specific parameters.

According to another aspect of the present invention,

A memory for storing a plurality of radio resource control configuration information; And a setting unit for instructing the terminal to select one radio resource control configuration information from among the plurality of radio resource control configuration information.

At this time,

A second cell specific parameter which is independent of a first cell specific parameter already set in the UE and applicable only to the UE,

Wherein the plurality of radio resource control configuration information comprises:

The second cell specific parameter related to the first sounding reference signal and the second cell specific parameter associated with the second sounding reference signal.

In addition,

A second terminal specific parameter independent of a first terminal specific parameter already set in the terminal,

Wherein the plurality of radio resource control configuration information comprises:

And may include the first terminal specific parameter and the second terminal specific parameter.

The first sounding reference signal may include a first cyclic sounding reference signal and a first aperiodic sounding reference signal,

Wherein the second sounding reference signal comprises a second periodic sounding reference signal and a second aperiodic sounding reference signal,

Wherein the first terminal specific parameter includes a first terminal unique parameter for the first cyclic sounding reference signal and a first terminal unique parameter for the first aperiodic sounding reference signal,

Wherein the second terminal specific parameter comprises a 2-1 terminal specific parameter for the second periodic sounding reference signal and the 2-2 terminal specific parameter for the second aperiodic sounding reference signal,

Wherein,

The first-1-th terminal specific parameter and the second-1-th terminal specific parameter, which are independent of each other, and the first-second terminal specific parameter and the second- .

The first sounding reference signal may include a first cyclic sounding reference signal and a first aperiodic sounding reference signal,

Wherein the second sounding reference signal comprises a second periodic sounding reference signal and a second aperiodic sounding reference signal,

Wherein the first terminal specific parameter includes a first terminal unique parameter for the first cyclic sounding reference signal and a first terminal unique parameter for the first aperiodic sounding reference signal,

Wherein the second terminal specific parameter comprises a 2-1 terminal specific parameter for the second periodic sounding reference signal and the 2-2 terminal specific parameter for the second aperiodic sounding reference signal,

Wherein,

The first-1-th terminal unique parameter and the second-1-terminal unique parameter, which are the same as each other, and the first-second terminal unique parameter and the second-second terminal unique parameter independent of each other.

The first sounding reference signal may include a first cyclic sounding reference signal and a first aperiodic sounding reference signal,

Wherein the second sounding reference signal comprises a second periodic sounding reference signal and a second aperiodic sounding reference signal,

Wherein the first terminal specific parameter includes a first terminal unique parameter for the first cyclic sounding reference signal and a first terminal unique parameter for the first aperiodic sounding reference signal,

Wherein the second terminal specific parameter comprises a 2-1 terminal specific parameter for the second periodic sounding reference signal and the 2-2 terminal specific parameter for the second aperiodic sounding reference signal,

Wherein,

The first-1-terminal unique parameter and the second-1-terminal unique parameter, which are independent of each other, and the second-second terminal unique parameter and the second-second terminal unique parameter that are equal to each other.

The first sounding reference signal may include a first cyclic sounding reference signal and a first aperiodic sounding reference signal,

Wherein the second sounding reference signal comprises a second periodic sounding reference signal and a second aperiodic sounding reference signal,

Wherein,

A second terminal specific parameter identical to a first terminal specific parameter already set in the terminal,

Wherein the plurality of radio resource control configuration information comprises:

The first cyclic sounding reference signal and the second cyclic sounding reference signal including terminal specific parameters for each of the first periodic sounding reference signal and the first aperiodic sounding reference signal, And a second terminal specific parameter including a terminal specific parameter for each of the reference signals.

In addition,

And can instruct the terminal using a semi-static configuration scheme.

In addition,

And can instruct the terminal through dynamic signaling through the physical downlink control channel.

In addition,

And can instruct the terminal using the bit information added to the downlink control information.

In addition,

And can instruct the terminal using the remaining code point of the field included in the downlink control information.

According to an embodiment of the present invention, a UE receiving a downlink control channel through an arbitrary base station can set up the uplink to support transmission to another base station with better channel quality and geometry of the uplink. This overcomes the coverage for the uplink channels, i.e. PUCCH and PUSCH channels.

Also, uplink channels and signals transmitted to different base stations can be distinguished.

In addition, it enables measurement of the uplink channel state with a base station other than the serving base station through transmission of periodic or aperiodic sounding reference signals.

Therefore, there is a case where the target of transmission and reception of the uplink and the downlink is the same in the position of the terminal, i.e., the terminal performs the transmission operation on the downlink data and the control channel with one base station, It is possible to support the mobile station to operate under the coordination of the base station so that the transmission target is different from the target for the uplink and downlink data and control channel.

Also, it is possible to set the sequence for the sounding reference signal independently of the PUCCH and PUSCH, and to set an independent sequence for the periodic sounding reference signal and the aperiodic sounding reference signal. Therefore, the sounding reference signal can be set to generate a sequence independent of the PUCCH and PUSCH, and the flexibility of scheduling of the base station can be provided.

Also, in the TDD system using the uplink channel quality measurement and the channel reciprocity for the serving base station and the neighbor base station, it is possible to independently perform the quality measurement for the downlink of the serving base station and the neighbor base station.

In addition, by locating the terminal using the sounding channel or grasping the geometry of the terminal, the terminal uses the terminal-specific downlink transmission method in the downlink transmission due to the cell boundary or the center of the cell, It can also be used to improve data throughput.

1 is a configuration diagram of a communication system according to an embodiment of the present invention.
2 is a configuration diagram of a communication system according to another embodiment of the present invention.
3 is a configuration diagram of a communication system according to another embodiment of the present invention.
4 is a configuration diagram of a communication system according to another embodiment of the present invention.
5 is a configuration diagram of a communication system according to another embodiment of the present invention.
6 is a configuration diagram of a communication system according to another embodiment of the present invention.
FIG. 7 illustrates a cloud-based base station structure to which an embodiment of the present invention is applied.
8 is a block diagram illustrating a schematic configuration of a serving BS according to an embodiment of the present invention.
9 is a block diagram showing a schematic configuration of a first terminal according to an embodiment of the present invention.
10 is a flowchart illustrating a method of generating a sounding reference signal according to an embodiment of the present invention.
11 is a flowchart illustrating a method of generating a sounding reference signal according to another embodiment of the present invention.
12 is a flowchart illustrating a method of generating a sounding reference signal according to another embodiment of the present invention.
13 is a flowchart illustrating an uplink transmission method according to an embodiment of the present invention .
14 is a flowchart illustrating an uplink transmission method according to another embodiment of the present invention.
15 is a flowchart illustrating an uplink transmission method according to another embodiment of the present invention.
16 is a flowchart illustrating an uplink transmission method according to another embodiment of the present invention.
17 is a flowchart illustrating an uplink transmission method according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

Also, the terms " part, "" module," and " module ", etc. in the specification mean a unit for processing at least one function or operation and may be implemented by hardware or software or a combination of hardware and software have.

In this specification, a terminal includes a mobile station (MS), a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS), a user equipment , An access terminal (UE), an access terminal (AT), and the like, and may include all or some functions of a terminal, a mobile terminal, a subscriber station, a mobile subscriber station, a user equipment,

In this specification, a base station (BS) includes an access point (AP), a radio access station (RAS), a node B, an evolved NodeB (eNodeB) A base station (BTS), a mobile multihop relay (MMR) -BS, or the like, and may perform all or a part of functions of an access point, a radio access station, a Node B, an eNodeB, a base transceiver station, .

Now, a method of generating a sounding reference signal, an uplink transmission method, and a base station according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a configuration diagram of a communication system according to an embodiment of the present invention. FIG. 2 is a configuration diagram of a communication system according to another embodiment of the present invention. FIG. 4 is a configuration diagram of a communication system according to another embodiment of the present invention, FIG. 5 is a configuration diagram of a communication system according to another embodiment of the present invention, and FIG. 7 is a diagram illustrating a cloud-based base station structure to which an embodiment of the present invention is applied.

1 to 6, the communication system includes a first base station 100 and a second base station 200, each of which has a cell coverage of a different size, and a heterogeneous network (heterogeneous network, Het-Net). Here, although only two base stations are illustrated, they may include a plurality of base stations.

In this heterogeneous network, a macro cell 300 serving as a service area of the first base station 100 and a small cell 400 serving as a service area of the second base station 200 are overlapped. The small cell 400 covers an area smaller than the macro cell 300. A plurality of small cells 400 may exist in one macro cell 300. In other words, a small cell 400 such as a pico cell, a micro cell, and a femtocell is formed by overlapping low power RRH (Remote Radio Heads) .

In addition, a communication system to which an embodiment of the present invention is applied includes a CoMP scenario (Coordinated Multi- Point-to-Multipoint) scenario in which uplink and downlink data rates of a UE located in a cell boundary region are increased through cooperative communication between adjacent cells. Point scenario 3, 4, which is a cloud-based base station structure, as shown in FIG.

Referring to FIG. 7, the cloud-based base station structure is divided into a radio signal processing unit (RU) 700 and a digital signal processing unit (DU) 800 as general base stations. A typical base station includes a processing unit corresponding to each of the wireless signal processing apparatus 700 and the digital signal processing apparatus 800 in one physical system, and one physical system is installed in the service target area. On the other hand, according to the cloud-based base station structure, the wireless signal processing device 700 and the digital signal processing device 800 are physically separated, and only the wireless signal processing device 700 is installed in the service area. And a digital signal processing device 800 has a control management function for a plurality of radio signal processing devices 700 forming respective independent cells. At this time, the wireless signal processing device 700 and the digital signal processing device 800 may be connected by an optical cable.

Here, the digital signal processing apparatus 800 is a part that performs digital signal processing and resource management control functions of the base station and is connected to a core system (not shown). It is installed in centralized areas such as Internet Data Center (IDC, Internet Data Center). In addition, the digital signal processing apparatus 800 can transmit various wireless technologies such as Wideband Code Division Multiple Access (WCDMA), Wireless Broadband Internet (WiBro) and Long Term Evolution (LTE) 800, so that a plurality of digital signal processing apparatuses 800 may be operated as one.

The radio signal processing apparatus 700 is a part for amplifying a radio wave signal in the radio signal processing section of the base station and radiating it to the antenna. That is, the wireless signal processing apparatus 700 converts a digital signal received from the digital signal processing apparatus 800 into a radio frequency (RF) signal according to a frequency band and amplifies the signal.

Referring again to FIGS. 1 to 6, the first base station 100 and the second base station 200 may be implemented by the wireless signal processing apparatus 700 of FIG. At this time, the first base station 100 and the second base station 200 may be referred to as eNB, RU, and RRH (Remote Radio Heads). A base station controller (not shown) implemented by the digital signal processor 800 is connected to the upper end of the first base station 100 and the second base station 200, 200 can be managed. Here, the first base station 100 and the second base station 200 may be managed by a single base station controller (not shown) or managed by different base station controllers (not shown), respectively.

Here, according to the cooperative multi-point (CoMP) scenario, the first terminal 500 located in the cell boundary region is requested to estimate the uplink channel with the adjacent second base station 200. At this time, the first terminal 500 is located in the macro cell 300 but is defined as a terminal located in an area that can be influenced by the small cell 400. The first terminal 500 transmits and receives signals to and from the second base station 200 located at the center of the small cell 400 as well as the first base station 100 currently connected, The second base station 200 can transmit and receive signals.

Hereinafter, the first base station 100 is referred to as a serving base station and the second base station 200 is referred to as a neighbor base station in this specification.

At this time, the neighbor base station 200 is assumed to be a base station having a good geometry and channel quality for the first terminal 500.

The operation between the terminal and the base station will now be described with respect to each of the embodiments of the communication systems of Figs. 1 to 6.

First, referring to FIG. 1, a first MS 500 receives a downlink control channel and a data channel from a serving BS 100 (1). Here, the DL control channel and the data channel include a Physical Downlink Shared Channel (PDSCH) and a Physical Downlink Control Channel (PDCCH). The first MS 500 transmits the uplink related channel to the neighbor BS 200 ((2)). Here, the uplink related channel includes a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), a sounding reference signal (SRS) (RS) related reference signal.

Here, the sounding reference signal is generally transmitted in a sequence. The reference signal sequence may utilize a cyclically shifted sequence. The sounding reference signal is a reference signal transmitted from the first terminal 500 to the base stations 100 and 200 for uplink scheduling. The base stations 100 and 200 estimate an uplink channel through the received sounding reference signal and use the estimated uplink channel for uplink scheduling.

At this time, the first terminal 500 generates a sequence for the first sounding reference signal independently of the sequence used for the uplink data and control channels, that is, the PUSCH and the PUCCH, according to the sequence information received from the serving base station 100 . That is, a sequence group index and a sequence index of the first sounding reference signal are set from the sequence information received from the serving base station 100. Then, the first sounding reference signal is transmitted to the neighboring base station 200 other than the serving base station 100 receiving the downlink control channel and the data channel, thereby performing the uplink channel estimation.

Here, the sequence information may include a cyclic shift index and an OCC index for generating a sounding reference signal.

As described above, the transmission and reception targets of the uplink and the downlink may be set differently in the first terminal 500. That is, the terminal receiving the downlink control channel through the serving base station 100 to which it belongs can support transmission to the neighboring base station 200 with better channel quality and geometry of the uplink.

2 and 6, a description will be given of a method for distinguishing channels and signals transmitted from the first terminal 500 to the serving base station 100 and signals transmitted to the adjacent base station 200 do.

That is, the first terminal 500 can distinguish the uplink channel (for example, PUSCH, PUCCH, SRS related RS) transmitted to the serving base station 100 from the uplink channel transmitted to the neighbor base station 200 do. In this case, the uplink channels may be classified according to the same channel type, that is, between the SRSs, between the PUSCHs, between the PUCCHs, and between the related RSs. Between PUSCHs, between PUCCHs and PUSCHs, and between PUCCHs and SRSs.

Here, the division between the same channel type, that is, the sounding reference signal SRS, will be described for each embodiment.

Referring to FIG. 2, the first MS 500 receives a downlink control channel and data channels, i.e. PDCCH and PDSCH, from the serving BS 100 (1 & cir &). The first MS 500 transmits a PUCCH for transmitting an A / N (ACK / NACK) signal or channel quality information (CQI) as a response signal for a downlink transmission in an uplink related channel, And transmits the sounding reference signal to the serving BS 100 and the neighbor BS 200, respectively ((3) and (4)).

At this time, the first terminal 500 generates a sequence for the first sounding reference signal independently of the sequence used for the uplink data and control channels, that is, the PUSCH and the PUCCH, according to the sequence information received from the serving base station 100 . A sequence group index and a sequence index of the first sounding reference signal are set from the sequence information received from the serving base station 100. Also, the first terminal 500 generates a sequence for the second sounding reference signal using the sequence used for the PUSCH and the PUCCH. That is, a sequence of the second sounding reference signal from the sequence index (u) of the PUCCH and a defined sequence index (sequence index (v)) in the sequence hopping used for the sequence index of the PUSCH Group index and sequence index are derived and set.

As described above, the first terminal 500 generates the first sounding reference signal and the second sounding reference signal according to the independent sequence information. That is, in the case of the first sounding reference signal, the sounding reference signal is not generated by being derived from the PUCCH sequence group index or the PUSCH sequence index based on the cell ID (cell ID), and a sequence in which the sounding reference signal is independent of the PUCCH and PUSCH And in the case of the second sounding reference signal, it is derived from the sequence index and the sequence index based on the cell ID and generated. This enables transmission to the serving base station 100 and independent transmission of the sounding reference signal to another base station 200.

At this time, the first terminal 500 transmits a first sounding reference signal to the neighboring base station 200 (3). Also, the second sounding reference signal is transmitted to the serving base station 100 (4).

Then, the neighbor base station 200 estimates the uplink channel using the first sounding reference signal, and performs uplink scheduling. In addition, the serving base station 10 estimates the uplink channel using the second sounding reference signal and performs uplink scheduling.

At this time, the first sounding reference signal and the second sounding reference signal generated according to the independent sequence information are independently generated by different configuration parameters. That is, the second sounding reference signal Conf.0 transmitted to the serving base station 100 and the first sounding reference signal Conf.1 transmitted to the neighboring base station 200 are independent of each other (Conf.0, Conf.1).

The first sounding reference signal Conf.1 and the second sounding reference signal Conf.0 include a periodic sounding reference signal and an aperiodic sounding reference signal, The sequence information of each of the signal and the aperiodic sounding reference signal, that is, the sequence group index and the sequence index, are set to be the same. That is, it is set independently of the sequence group index and the sequence index of the PUCCH and PUSCH.

In this way, it is possible to set the sequence for the sounding reference signal independently of the PUCCH and the PUSCH, thereby making it possible to use the uplink channel quality measurement and the channel reciprocity of the serving base station 100 and the other base station 200 In the time division duplex (TDD) system, the quality of the downlink of the serving base station 100 and the other base stations 200 can be independently measured.

In addition, since the UE recognizes the position of the UE using the sounding channel or the geometry of the UE, the UE uses the UE-specific downlink transmission method in the downlink transmission according to the cell boundary or the center of the cell, And can also be used to improve the data throughput of the system.

Now, an embodiment will be described in which the transmission of the periodic reference signal and the aperiodic reference signal to the serving base station 100 and the transmission to the neighbor base station 200 can be independently performed. That is, the sequence group index and the sequence index of the periodic sounding reference signal and the aperiodic sounding reference signal are independently set.

The cell specific parameter for the sounding reference signal is configured as' cell common 'through' SoundingRS-UL-Config 'in '36 .331 v.10.5.0 specification section 6.3.2'.

Also, the UE specific parameters for the periodic reference signal and the aperiodic sounding reference signal are respectively set as UE dedicated parameters through 'SoundingRS-UL-Config'.

Here, a legacy terminal (meaning a terminal according to a conventional technology) has a single RRC parameter (RRC parameter) as a cell specific parameter as an RRC parameter, .

However, the first MS 500 according to an embodiment of the present invention may select one RS configuration parameter from a plurality of RRC configuration parameters according to the setting of the serving BS 100.

In other words, the serving base station 100 may be configured to operate in a cell common or independent of a cell specific parameter set for operating in a legacy terminal, Parameter (cell common parameter). In addition, the UE specific parameter for the sounding reference signal is set so as to be independently configurable.

As described above, the serving base station 100 can provide a scheduling flexibility with a plurality of RRC configuration parameters, and can be transmitted at a transmission point, that is, adjacent to the serving base station 100 To enable different scheduling for transmission to the base station 200.

Referring to FIG. 3, the first MS 500 receives a downlink control channel and data channels, i.e. PDCCH and PDSCH, from the serving BS 100 (1 & cir &). The first MS 500 transmits a PUCCH for transmitting an A / N (ACK / NACK) signal or channel quality information (CQI) as a response signal for a downlink transmission in an uplink related channel, PUSCH and SRS to the serving BS 100 and the neighbor BS 200, respectively ((5) and (6)).

At this time, the first terminal 500 generates a sequence for the first sounding reference signal independently of the sequence used for the uplink data and control channels, that is, the PUSCH and the PUCCH, according to the sequence information received from the serving base station 100 . Also, the first terminal 500 generates a sequence for the second sounding reference signal using the sequence used for the PUSCH and the PUCCH. That is, a sequence of the second sounding reference signal from the sequence index (u) of the PUCCH and a defined sequence index (sequence index (v)) in the sequence hopping used for the sequence index of the PUSCH Group index and sequence index are derived and set.

As described above, the first terminal 500 generates the first sounding reference signal and the second sounding reference signal according to the independent sequence information.

At this time, the first terminal 500 transmits the first sounding reference signal to the neighboring base station 200. And transmits the second sounding reference signal to the serving base station 100. Then, the neighbor base station 200 estimates the uplink channel using the first sounding reference signal, and performs uplink scheduling. In addition, the serving base station 10 estimates the uplink channel using the second sounding reference signal and performs uplink scheduling.

At this time, the first sounding reference signal includes a first periodic sounding reference signal and a first aperiodic sounding reference signal. Also, the second sounding reference signal includes a second periodic sounding reference signal and a second aperiodic sounding reference signal.

Herein, the serving base station 100 independently sets the configuration of the cell specific parameter associated with the sounding reference signal separately from the configuration of the legacy. Further, the configuration of the UE specific parameter for the periodic sounding reference signal and the configuration of the UE specific parameter for the aperiodic sounding reference signal are independently set separately from the legacy configuration.

That is, the serving base station 100 can independently designate all configurations of the sounding reference signal, and transmit the periodic sounding reference signal and the aperiodic sounding reference signal to the serving base station 100 and the neighboring base station 200 It is possible to additionally enable the flexibility of the entire configuration with respect to the scheduling to distinguish between the two. In addition, the UE behavior in the existing legacy terminal is not changed for the simultaneous transmission of the cyclic sounding reference signal and the aperiodic sounding reference signal and the uplink data channel and the control channel.

Accordingly, the first sounding reference signal includes a first periodic sounding reference signal Conf.1 and a first aperiodic sounding reference signal Conf3. And the second sounding reference signal includes a second periodic sounding reference signal (Conf.0) and a second aperiodic SRS (Conf.2). A first periodic sounding reference signal Conf. 1 and a first aperiodic sounding reference signal Conf. 3, a second periodic sounding reference signal Conf. 0, a second aperiodic sounding reference signal Conf.2) have independent configurations (Conf.0, Conf.1, Conf.2, Conf.3).

The first cyclic sounding reference signal Conf.1 and the first aperiodic sounding reference signal Conf.3 are transmitted to the neighboring base station 200 (step 5). In addition, the second periodic sounding reference signal Conf.0 and the second aperiodic sounding reference signal Conf.2 are transmitted to the serving base station 100 (6).

Referring to FIG. 4, the first MS 500 receives a downlink control channel and a data channel, i.e., a PDCCH and a PDSCH from the serving BS 100 (1 & cir &). The first MS 500 transmits a PUCCH for transmitting an A / N (ACK / NACK) signal or channel quality information (CQI) as a response signal for a downlink transmission in an uplink related channel, PUSCH and SRS to the serving base station 100 and the adjacent base station 200, respectively ((7) and (8)).

At this time, the serving base station 100 additionally sets the configuration of the cell specific parameter related to the sounding reference signal independently from the configuration of the legacy system, specific parameter is separately set separately from the legacy configuration, and the configuration of the UE specific parameter for the periodic sounding reference signal is set so as to follow the configuration set in the legacy .

That is, the first periodic SRS (Conf.0) and the second periodic SRS (Conf.0) have the same configuration (Conf.0). The first non-periodic SRS (Conf.3) and the second non-periodic SRS (Conf.2) have independent configurations (Conf.2, Conf.3).

The first periodic SRS (Conf.0) and the first aperiodic SRS (Conf.3) are transmitted to the neighbor base station 200 (7). In addition, the second periodic sounding reference signal Conf.0 and the second aperiodic sounding reference signal Conf.2 are transmitted to the serving base station 100 (8).

In this way, it is possible to set the periodic sounding reference signal and the aperiodic sounding reference signal so that the terminal behavior (UE behavior) existing in the existing legacy terminal does not change for the simultaneous transmission of the other uplink data channel and the control channel.

In addition, it is possible to additionally enable the transmission of the periodic sounding reference signal and the aperiodic sounding reference signal to the serving base station 100 and the transmission of the aperiodic sounding reference signal to the neighboring base station 200. In addition, it is possible to independently configure the aperiodic sounding reference signal so that the transmission of the aperiodic sounding reference signal to the serving base station 100 and the transmission to the neighboring base station 200 are performed in the scheduling of the base station And can provide full flexibility for the user.

Next, referring to FIG. 5, The first terminal 500 receives a downlink control channel and data channels, i.e. PDCCH and PDSCH, from the serving base station 100 (1 & cir &). The first MS 500 transmits a PUCCH for transmitting an A / N (ACK / NACK) signal or channel quality information (CQI) as a response signal for a downlink transmission in an uplink related channel, PUSCH and SRS to the serving base station 100 and the neighbor base station 200, respectively (steps 9 and 10).

At this time, only the configuration of the cell specific parameter related to the sounding reference signal is set independently of the legacy configuration. Each of the UE specific parameters for the periodic reference signal and the aperiodic reference signal is configured to follow the configuration set in the legacy.

That is, the first periodic SRS (Conf.0) and the second periodic SRS (Conf.0) have the same configuration (Conf.0). The first non-periodic SRS (Conf.2) and the second non-periodic SRS (Conf.2) also have the same configuration (Conf.2).

The first periodic SRS (Conf. 0) and the first aperiodic SRS (Conf. 2) are transmitted to the neighbor base station 200 (9). In addition, the second periodic sounding reference signal Conf.0 and the second aperiodic sounding reference signal Conf.2 are transmitted to the serving base station 100 (step 10).

In this case, the base station instructs different configurations of the sounding reference signal for each cell differently so that the cyclic sounding reference signal and the aperiodic sounding reference signal are transmitted to the legacy So that the UE behavior (UE behavior) operating in the UE does not change. In addition, it is possible to additionally enable the transmission of the periodic sounding reference signal and the aperiodic sounding reference signal to the serving base station 100 and the transmission of the aperiodic sounding reference signal to the neighboring base station 200.

6, the first MS 500 receives a downlink control channel and data channels, i.e. PDCCH and PDSCH, from the serving BS 100 (1 & cir &). The first MS 500 transmits a PUCCH for transmitting an A / N (ACK / NACK) signal or channel quality information (CQI) as a response signal for a downlink transmission in an uplink related channel, PUSCH and SRS to the serving BS 100 and the neighbor BS 200, respectively (11 and 12).

At this time, the serving base station 100 independently sets the configuration of the cell specific parameter related to the sounding reference signal separately from the legacy configuration. Further, the configuration of the UE specific parameter for the cyclic sounding reference signal is additionally set independently of the legacy configuration. The configuration of the UE specific parameter for the aperiodic sounding reference signal is set so as to follow the configuration set in the legacy.

That is, the first periodic SRS (Conf.1) and the second periodic SRS (Conf.0) have independent configurations (Conf.0, Conf.1). The first non-periodic SRS (Conf.2) and the second non-periodic SRS (Conf.2) have the same configuration (Conf.2).

The first periodic SRS (Conf.1) and the first aperiodic SRS (Conf.2) are transmitted to the neighboring base station 200 (11). In addition, the second periodic sounding reference signal Conf.0 and the second aperiodic sounding reference signal Conf.2 are transmitted to the serving base station 100 (step S12).

In this way, it is possible to set the periodic sounding reference signal and the aperiodic sounding reference signal so that the terminal behavior (UE behavior) existing in the existing legacy terminal does not change for the simultaneous transmission of the other uplink data channel and the control channel.

In addition, it is possible to additionally enable the transmission of the periodic sounding reference signal and the aperiodic sounding reference signal to the serving base station 100 and the transmission of the aperiodic sounding reference signal to the neighboring base station 200. In addition, it is possible to independently configure the aperiodic sounding reference signal so that the transmission of the aperiodic sounding reference signal to the serving base station 100 and the transmission to the neighboring base station 200 are performed in the scheduling of the base station And can provide full flexibility for the user.

The configuration and operation of the serving base station 100 and the first terminal 500 that implement the embodiments described above will be described.

8 is a block diagram illustrating a schematic configuration of a serving BS according to an embodiment of the present invention.

Referring to FIG. 8, the serving base station 100 includes a communication unit 101, a memory 103, and a processor 101.

Here, the communication unit 101 is connected to the processor 101 to transmit and receive a radio signal. The communication unit 101 may include a baseband circuit for processing a radio signal. The memory 103 is connected to the processor 105 and stores various information for driving the processor 105. [ Such memory 103 may be implemented in a medium such as a dynamic random access memory, a RAM such as a Rambus DRAM, a synchronous DRAM, a static RAM, or the like. The memory 103 may be internal or external to the processor 105, and may be coupled to the processor 105 by various well known means.

In addition, the memory 103 stores a plurality of radio resource control configuration information.

The processor 105 may be implemented as a central processing unit or other chipset, microprocessor, etc., and the layers of the air interface protocol may be implemented by the processor 105. The processor 105 includes a sequence setting unit 107 and a configuration setting unit 109.

Here, the sequence setting unit 107 transmits the sequence information to the first terminal 500. At this time, the sequence setting unit 107 may transmit the sequence information to the first terminal 500 by including the sequence information in the RRC configuration parameters.

In addition, the sequence setting unit 107 may transmit the sequence information to the first terminal 500 by including the sequence information in the physical downlink control channel (PDCCH).

In addition, the sequence setting unit 107 may include indication information in a physical downlink control channel (PDCCH) and transmit it to the first terminal 500.

Here, the indication information may include a 1-bit dynamic indication message indicating a radio resource control signaling parameter for the predefined sequence information through radio resource control signaling.

In addition, the sequence setting unit 107 may set the sequence information of each of the periodic sounding reference signal and the aperiodic sounding reference signal to be the same.

In addition, the sequence setting unit 107 may set the sequence information of the cyclic sounding reference signal and the aperiodic sounding reference signal differently from each other.

In this way, the sequence setting unit 107 sets the sequence information to the first terminal 500, thereby making it possible to generate the sounding reference signal in accordance with the independent sequence information.

Also, in the current 3GPP LTE / LTE-A system, an arbitrary UE periodically or non-periodically transmits a sounding reference signal for uplink channel state measurement for uplink channel estimation with a base station of a cell to which it is connected .

Therefore, in the case of the sounding reference signal for measuring the uplink channel state, the RRC parameters set from the serving base station 100 to which the first terminal 500 belongs are transmitted from the first terminal 500 to the serving base station 500, (100). These RRC parameters include the cell specific SRS bandwidth of the sounding reference signal, the transmission comb, (even subcarriers or odd subcarriers assigned to 2 subcarrier spacing intervals) UE- specific SRS bandwidth, hopping related configuration parameters, frequency domain position, periodicity, subframe configuration (specify which sub-frame to transmit sounding reference signal), antenna configuration (specify number of antennas to transmit sounding reference signal, the number of antenna ports), the base sequence index (the sounding reference signal sequence index for generating the corresponding sounding reference signal is determined by the sequence group number u used in the PUCCH and the sequence number v determined by the sequence hopping configuration), cyclic and a shift index (a cyclic shift index used as a reference when generating a sounding reference signal).

In addition, in order to transmit the aperiodic sounding reference signal, the configuration unit 109 dynamically dynamically triggers transmission of the aperiodic sounding reference signal through the PDCCH. Then, the first MS 500 receives the triggering by the PDCCH and the RRC parameters and transmits the uplink aperiodic sounding reference signal.

The configuration setting unit 109 transmits the configuration parameters of the sounding reference signal to the first terminal 500 through the RRC parameters for generating the sounding reference signal.

And instructs the first terminal (500) to select one radio resource control configuration information from a plurality of radio resource control configuration information stored in the memory (103).

At this time, the radio resource control configuration information includes a cell specific parameter and a UE specific parameter.

The configuration setting unit 109 sets a second cell unique parameter that is independent of the first cell unique parameter already set in the first terminal 500 and applicable only to the first terminal 500 to the first terminal 500 do.

Here, the first cell specific parameter is a parameter related to the first sounding reference signal, and the second cell specific parameter is a parameter related to the second sounding reference signal.

The configuration setting unit 109 further sets a second terminal specific parameter independent of the first terminal specific parameter already set in the first terminal 500 to the first terminal 500.

2, a first sounding reference signal and a second sounding reference signal having different configurations are generated and transmitted to the serving base station 100 and the neighboring base station 200, respectively, by the first terminal 500 Embodiments may be implemented.

The first sounding reference signal may include a first periodic sounding reference signal and a first aperiodic sounding reference signal and the second sounding reference signal may include a second periodic sounding reference signal and a second aperiodic sounding reference signal, Ding reference signal.

At this time, the first UE specific parameter includes the first UE unique parameter for the first cyclic sounding reference signal and the first UE unique parameter for the first aperiodic sounding reference signal. And the second terminal specific parameter includes the second-1 UE specific parameter for the second periodic sounding reference signal and the second-second UE specific parameter for the second aperiodic sounding reference signal.

At this time, the configuration setting unit 109 sets the first-1-th terminal unique parameter and the 2-1-terminal unique parameter independent of each other and the first-second terminal unique parameter and the second- And instructs the terminal 500.

At this time, the configuration setting unit 109 can trigger the 2-1-terminal unique parameter and the 2-2-terminal unique parameter via the PDCCH.

3, the first periodic sounding reference signal, the first aperiodic sounding reference signal, the second periodic sounding reference signal, and the second aperiodic sounding reference signal are generated differently from each other, The first terminal 500 may transmit the data to the base station 100 and the neighboring base station 200.

In addition, the configuration setting unit 109 sets the first-1-th terminal specific parameter and the 2-th-1-th terminal specific parameter related to the cyclic sounding reference signal to be the same, The unique parameter and the second-second terminal specific parameter are set independently of each other, and the first terminal 500 is instructed.

4, the first periodic sounding reference signal and the second periodic sounding reference signal are configured to have the same configuration, and the first aperiodic sounding reference signal and the second aperiodic sounding reference signal are generated independently of each other And the first terminal 500 transmits to the serving base station 100 and the neighbor base station 200, respectively.

Also, the configuration setting unit 109 sets the first-1-th terminal specific parameter and the 2-th-1-terminal specific parameter that are independent of each other, (500).

In addition, the configuration setting unit 109 sets the first-1-th UE specific parameter and the 2-1-th UE specific parameter related to the cyclic sounding reference signal to be equal to each other, The terminal unique parameter and the second-second terminal unique parameter are set to be equal to each other, and the first terminal 500 is instructed.

5, the first periodic sounding reference signal and the second periodic sounding reference signal are generated to have the same configuration, and the first aperiodic sounding reference signal and the second aperiodic sounding reference signal are set to be equal to each other And the first terminal 500 transmits to the serving base station 100 and the neighbor base station 200, respectively.

Also, the configuration setting unit 109 sets the first-1-th terminal specific parameter and the 2-th-1-terminal specific parameter that are independent of each other, (500).

6, the first periodic sounding reference signal and the second aperiodic sounding reference signal are generated independently of each other, and the first aperiodic sounding reference signal and the second aperiodic sounding reference signal are It is possible to implement embodiments in which the first terminal 500 transmits the same configuration to the serving base station 100 and the neighbor base station 200, respectively.

In this case, if the configuration of the cell specific parameter related to the sounding reference signal is configured separately from the legacy configuration, the configuration setting unit 109 may notify the first terminal 500 of the configuration of the first terminal 500) is to follow the configuration for the sounding reference signal, the following two embodiments may be used.

According to one embodiment, the configuration setting unit 109 allows to designate one of multiple configurations as a semi-static RRC parameter.

According to another embodiment, the configuration setting unit 109 separately instructs the first terminal 500 through dynamic PDCCH with dynamic signaling.

The configuration setting unit 109 may further include a UE specific parameter configuration configured to operate as a legacy terminal for a periodic sounding reference signal and an aperiodic reference signal, The following embodiment can be used as an indication method for the configuration of the parameter.

According to one embodiment, the configuration setting unit 109 allows to designate one of multiple configurations as a semi-static RRC parameter.

According to another embodiment, the configuration setting unit 109 separately instructs the first terminal 500 through dynamic PDCCH with dynamic signaling.

According to another embodiment, when indicating through the PDCCH, an additional bit is allocated to each DCI format to indicate a configuration.

According to another embodiment of the present invention, in order to reduce the complexity of blind detection of a DCI format, a residual code of a field included in the DCI format such that a variation of a size of the DCI format does not appear, The remaining code-points are used.

9 is a block diagram showing a schematic configuration of a first terminal according to an embodiment of the present invention.

9, the first terminal 500 includes a communication unit 501, a memory 501, and a processor 505.

Here, the communication unit 501 is connected to the processor 505 to transmit and receive a radio signal. The communication unit 501 may include a baseband circuit for processing a radio signal. The memory 501 is connected to the processor 505 and stores various information for driving the processor 505. [ Such memory 503 may be implemented in a medium such as a dynamic random access memory, a RAM such as a Rambus DRAM, a synchronous DRAM, or static RAM. The memory 503 may be internal or external to the processor 505 and may be coupled to the processor 505 in a variety of well known ways.

The processor 505 may be implemented as a central processing unit or other chipset, microprocessor, etc., and the layers of the air interface protocol may be implemented by the processor 505. [ The processor 505 includes a sequence control unit 507, a configuration control unit 509, and a generation unit 511.

The sequence controller 507 sets a sounding reference signal sequence independent of the sequence of the uplink channel according to the sequence information received from the serving base station 100.

At this time, the sequence controller 507 detects a corresponding uplink grant in a blind decoding of a downlink control channel, i.e., a PDCCH, according to a sequence of a sounding reference signal. can do. That is, when an indication of a related sequence index is included in the PDCCH and the RRC parameter defined in advance through the RRC is transmitted through a 1-bit dynamic indication The sequence controller 507 controls the sequence number of the first terminal in the UE dedicated search space not in the UE common search space during blind detection of the PDCCH, A DCI format 0 and a DCI format 4, which are UL grants (UL grants) containing uplink scheduling information for the UE 500, are defined.

When the 1-bit indication is included in the downlink through the DCI format 1a / 2b / 2c on the PDCCH as the grant information, the sequence control unit 507 controls the sequence controller 507 on blind detection of the PDCCH The DCI format 1a, 2b or 2c on the PDCCH that contains the downlink scheduling information for the first UE 500 in the UE dedicated search space other than the UE common search space, The behavior of the terminal is determined so as to search for the terminal.

Therefore, the first terminal 50 after Rel-11) is required to always search for a grant containing downlink and uplink scheduling information in a UE dedicated search space at the time of performing an associated operation Respectively.

The indication message may also be accompanied by a dynamic indication message via PDCCH of the source eNodeB, or control data of the MAC layer or RRC signaling. Also, during this period, the first terminal 500 does not receive the response message nor transmit the data.

At this time, the sequence controller 507 may generate a first sounding reference signal including a first cyclic sounding reference signal and a first aperiodic sounding reference signal generated according to the same sequence information. That is, the sequence information for the first sounding reference signal independent of the sequence of the uplink channel is the same for the cyclic sounding reference signal and the aperiodic sounding reference signal.

In addition, the sequence controller 507 may generate a first sounding reference signal including a first periodic sounding reference signal and a first aperiodic sounding reference signal, which are generated according to sequence information independent of each other. That is, the sequence information for the first sounding reference signal, which is independent of the sequence of the uplink channel, is different for the cyclic sounding reference signal and the aperiodic sounding reference signal.

In addition, the configuration control unit 509 generates a cyclic sounding reference signal and an aperiodic sounding reference signal based on an RS seed parameter independent of the legacy configuration, that is, a cell specific parameter and a terminal specific parameter, in accordance with the configuration instruction received by the serving base station 100 Set the configuration of the signal.

The generator 511 generates a first sounding reference signal and a second sounding reference signal according to the independent sequence information according to each of the embodiments described with reference to FIG. 1 to FIG. And generates a first periodic sounding reference signal, a first aperiodic sounding reference signal, a second periodic sounding reference signal, and a second aperiodic sounding reference signal having the same or different configurations.

The generated first and second sounding reference signals are transmitted according to UE-specific parameters in an uplink subframe / bandwidth region where cell specific parameters are satisfied .

Now, a method of generating a sounding reference signal based on the above-described configuration will be described. This will be described in conjunction with the configuration of FIG.

10 is a flowchart illustrating a method of generating a sounding reference signal according to an embodiment of the present invention.

Referring to FIG. 10, the sequence controller 507 of the first terminal 500 checks sequence information included in the ALS configuration information received from the serving base station 100 (S103).

The generating unit 511 generates the sequence information using the sequence information received from the sequence controller 507 in step S103 so as to be independent of the sequence used for the uplink channel, i.e., the uplink control channel (PUCCH) and the uplink shared channel (PUSCH) The first sounding reference signal sequence is generated according to the set sequence information (S105).

11 is a flowchart illustrating a method of generating a sounding reference signal according to another embodiment of the present invention.

Referring to FIG. 11, the sequence controller 507 of the first terminal 500 checks sequence information included in a physical downlink control channel (PDCCH) received from the serving base station 100 (S201) (S203).

The generating unit 511 generates the sequence information using the sequence information received from the sequence controller 507 in step S103 so as to be independent of the sequence used for the uplink channel, i.e., the uplink control channel (PUCCH) and the uplink shared channel (PUSCH) The first sounding reference signal sequence is generated according to the set sequence information (S205).

12 is a flowchart illustrating a method of generating a sounding reference signal according to another embodiment of the present invention.

Referring to FIG. 12, the sequence controller 507 of the first terminal 500 receives a physical downlink control channel (PDCCH) from the serving base station 100 (S301).

Next, the sequence controller 507 of the first terminal 500 performs blind decoding on the physical downlink control channel in the terminal dedicated search space (S303).

Next, the sequence controller 507 of the first terminal 500 searches for an uplink grant or a downlink grant (S305) and confirms the indication information (S305).

Next, the sequence controller 507 of the first terminal 500 sets the sequence information according to the instruction information confirmed in step S305 (S307).

The generator 511 generates the first sounding reference signal sequence independently of the sequence used for the uplink control channel (PUCCH) and the uplink shared channel (PUSCH) using the sequence information set in step S307 S309).

13 is a flowchart illustrating an uplink transmission method according to an embodiment of the present invention.

Referring to FIG. 13, the first terminal 500 receives sequence information from the serving base station 100 (S401).

Next, the first terminal 500 generates a first sounding reference signal independently of the sequence used for the uplink channel using the sequence information received in step S401 (S403). And transmits it to the adjacent base station 200 (S405).

Then, the neighboring base station 200 estimates the uplink channel with the first terminal 500 based on the first sounding reference signal (S407).

Next, the first terminal 500 generates a second sounding reference signal using the sequence used for the uplink channel (S409). And transmits the message to the serving base station 100 (S411).

Then, the serving base station 100 estimates the uplink channel with the first terminal 500 based on the first sounding reference signal (S413).

FIG. 14 is a flowchart illustrating an uplink transmission method according to another embodiment of the present invention, which corresponds to the embodiments of FIGS. 2 and 5 described above.

Referring to FIG. 14, the first terminal 500 receives sequence information from the serving base station 100 (S501). Then, a configuration information selection instruction is received (S503). That is, an instruction to select one of the plurality of Al's seed configuration parameters.

At this time, the configuration information selection instruction in step S503 includes an instruction to additionally set independent first cell intrinsic parameters separately from the legacy configuration.

In step S503, the first terminal 500 generates a first sounding signal in accordance with the first cell intrinsic parameter, which is independent of the sequence used for the uplink channel using the sequence information received in step S501, And generates a reference signal (S505).

At this time, the first terminal 500 receives the first cyclic sounding reference signal according to the first cell specific parameter selected in accordance with the instruction received in step S503 and the first terminal unique parameter according to the legacy configuration, And generate a first aperiodic sounding reference signal according to the first cell specific parameter selected in accordance with the instruction and the first-second terminal specific parameter according to the legacy configuration.

Then, the generated first sounding reference signal is transmitted to the neighboring base station 200 (S507).

Then, the neighbor base station 200 estimates the uplink channel with the first terminal 500 based on the first sounding reference signal (S509).

Next, the first terminal 500 generates a second sounding reference signal using a sequence used for the uplink channel and a second cell specific parameter in the legacy configuration (S511).

At this time, the first terminal 500 generates a second cyclic sounding reference signal according to the first cell specific parameter selected according to the second cell specific parameter of the legacy configuration and the second-1 terminal specific parameter according to the legacy configuration, And generate a second aperiodic sounding reference signal according to the selected first cell specific parameter and the second-second terminal specific parameter according to the received instruction.

The generated second sounding reference signal is transmitted to the serving base station 100 (S513).

Then, the serving base station 100 estimates the uplink channel with the first terminal 500 based on the second sounding reference signal (S515).

Here, the 1-1 th UE specific parameter and the 2-1 th UE specific parameter related to the cyclic sounding reference signal described above are identical to each other, and the 2-1 th UE specific parameter related to the aperiodic sounding reference signal and the 2- 2 terminal specific parameters are the same.

 FIG. 15 is a flowchart illustrating an uplink transmission method according to another embodiment of the present invention, and corresponds to the embodiment of FIG. 3 described above.

Referring to FIG. 15, the first terminal 500 receives sequence information from the serving base station 100 (S601). And receives a configuration information selection instruction (S603). At this time, the configuration information selection instruction includes an instruction to additionally set the first cell unique parameter, the first-terminal unique parameter, and the first-second terminal specific parameter independent of the legacy configuration.

Then, the first terminal 500 uses the sequence information received in step S601 to generate a first cell unique parameter selected in accordance with the instruction received in step S603, And generates a first cyclic sounding reference signal according to the unique parameter (S605).

In addition, the first terminal 500 is independent of the sequence used for the uplink channel using the sequence information received in step S601, and the first cell inherent parameter selected in accordance with the instruction received in step S603, And generates a first aperiodic sounding reference signal according to the intrinsic parameter (S607).

Next, the first MS 500 transmits a first cyclic sounding reference signal and a first aperiodic sounding reference signal to the neighbor BS 200 (S609). Then, the neighbor base station 200 estimates the uplink channel with the first terminal 500 based on the 1 periodic sounding reference signal and the first aperiodic sounding reference signal (S611).

Also, the first terminal 500 generates a second cyclic sounding reference signal using a sequence used for an uplink channel, a second cell specific parameter according to a legacy configuration, and a second-1 " S613).

Then, the first terminal 500 generates a second aperiodic sounding reference signal using the sequence used for the uplink channel, the second cell specific parameter according to the legacy configuration, and the second-second terminal specific parameter ( S615).

Next, the first terminal 500 transmits a second periodic sounding reference signal and a second aperiodic sounding reference signal to the serving base station 100 (S617). Then, the serving base station 100 estimates the uplink channel with the first MS 500 based on the second periodic sounding reference signal and the second aperiodic sounding reference signal (S619).

16 is a flowchart illustrating an uplink transmission method according to another embodiment of the present invention, which corresponds to the embodiment of FIG.

Referring to FIG. 16, the first terminal 500 receives sequence information from the serving base station 100 (S701). Then, the configuration information selection instruction is received (S703). At this time, the configuration information selection instruction includes an instruction to additionally set the first cell unique parameter and the first-second terminal specific parameter independent of the legacy configuration.

Then, the first terminal 500 is independent of the sequence used for the uplink channel using the sequence information received in step S601, and the first cell unique parameter and the first terminal unique ID in accordance with the instruction received in step S703 And generates a first aperiodic sounding reference signal according to the parameter (S705).

In addition, the first terminal 500 may use the sequence information received in step S701, and may be independent of the sequence used for the uplink channel, and may include a first cell unique parameter according to the instruction received in step S703, And generates a first periodic sounding reference signal according to the 1-2 unique terminal parameter (S707).

Next, the first MS 500 transmits a first cyclic sounding reference signal and a first aperiodic sounding reference signal to the neighbor BS 200 (S709). Then, the neighbor base station 200 estimates the uplink channel with the first terminal 500 based on the 1 periodic sounding reference signal and the first aperiodic sounding reference signal (S711).

Also, the first terminal 500 generates a second cyclic sounding reference signal using a sequence used for an uplink channel, a second cell specific parameter according to a legacy configuration, and a second-1 " S713).

Then, the first terminal 500 generates a second aperiodic sounding reference signal using the sequence used for the uplink channel, the second cell specific parameter according to the legacy configuration, and the second-second terminal specific parameter ( S715).

Next, the first terminal 500 transmits a second periodic sounding reference signal and a second aperiodic sounding reference signal to the serving base station 100 (S717). Then, the serving base station 100 estimates the uplink channel with the first terminal 500 based on the second periodic sounding reference signal and the second aperiodic sounding reference signal (S719).

17 is a flowchart illustrating an uplink transmission method according to another embodiment of the present invention, and corresponds to the embodiment of FIG. 6 described above.

Referring to FIG. 17, the first terminal 500 receives sequence information from the serving base station 100 (S801). Then, a configuration information selection instruction is received (S803). At this time, the configuration information selection instruction includes an instruction to additionally set the first cell unique parameter and the first-terminal unique parameter that are independent from the legacy configuration.

Then, the first terminal 500 is independent of the sequence used for the uplink channel using the sequence information received in step S801, and the first cell unique parameter and the first-terminal unique ID according to the instruction received in step S803, And generates a first cyclic sounding reference signal according to the parameter (S805).

In addition, the first terminal 500 is independent of the sequence used for the uplink channel by using the sequence information received in step S801, and generates the first cell unique parameter according to the instruction received in step S803, And generates a first aperiodic sounding reference signal according to the 1-2 terminal specific parameters (S807).

Next, the first MS 500 transmits a first periodic sounding reference signal and a first aperiodic sounding reference signal to the neighbor BS 200 (S809). Then, the neighbor base station 200 estimates the uplink channel with the first terminal 500 based on the 1 periodic sounding reference signal and the first aperiodic sounding reference signal (S811).

Also, the first terminal 500 generates a second cyclic sounding reference signal using a sequence used for an uplink channel, a second cell specific parameter according to a legacy configuration, and a second-1 " S813).

Then, the first terminal 500 generates a second aperiodic sounding reference signal using the sequence used for the uplink channel, the second cell specific parameter according to the legacy configuration, and the second-second terminal specific parameter ( S815).

Next, the first terminal 500 transmits a second periodic sounding reference signal and a second aperiodic sounding reference signal to the serving base station 100 (S817). Then, the serving base station 100 estimates the uplink channel with the first terminal 500 based on the second periodic sounding reference signal and the second aperiodic sounding reference signal (S819).

The embodiments of the present invention described above are not implemented only by the apparatus and method, but may be implemented through a program for realizing the function corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (11)

A memory for storing a plurality of radio resource control configuration information; And
And a setting unit for instructing the terminal to select one radio resource control configuration information from among the plurality of radio resource control configuration information,
/ RTI > The method according to claim 1,
Wherein,
A second cell specific parameter which is independent of a first cell specific parameter already set in the UE and applicable only to the UE,
Wherein the plurality of radio resource control configuration information comprises:
And the second cell specific parameter related to the first cell specific parameter and the second sounding reference signal associated with the first sounding reference signal. 3. The method of claim 2,
Wherein,
A second terminal specific parameter independent of a first terminal specific parameter already set in the terminal,
Wherein the plurality of radio resource control configuration information comprises:
The first terminal specific parameter and the second terminal specific parameter. The method of claim 3,
Wherein the first sounding reference signal comprises a first periodic sounding reference signal and a first aperiodic sounding reference signal,
Wherein the second sounding reference signal comprises a second periodic sounding reference signal and a second aperiodic sounding reference signal,
Wherein the first terminal specific parameter includes a first terminal unique parameter for the first cyclic sounding reference signal and a first terminal unique parameter for the first aperiodic sounding reference signal,
Wherein the second terminal specific parameter includes a 2-1 terminal specific parameter for the second periodic sounding reference signal and a 2-2 terminal specific parameter for the second aperiodic sounding reference signal,
Wherein,
And instructs the terminal to the first-1-th terminal specific parameter and the second-1-th terminal specific parameter independent of each other, the first-second terminal specific parameter and the second-second terminal specific parameter independent of each other. The method of claim 3,
Wherein the first sounding reference signal comprises a first periodic sounding reference signal and a first aperiodic sounding reference signal,
Wherein the second sounding reference signal comprises a second periodic sounding reference signal and a second aperiodic sounding reference signal,
Wherein the first terminal specific parameter includes a first terminal unique parameter for the first cyclic sounding reference signal and a first terminal unique parameter for the first aperiodic sounding reference signal,
Wherein the second terminal specific parameter includes a 2-1 terminal specific parameter for the second periodic sounding reference signal and a 2-2 terminal specific parameter for the second aperiodic sounding reference signal,
Wherein,
And instructs the terminal to receive the first 1-1 terminal unique parameter and the second 2-1 terminal unique parameter and the first 1-2 terminal unique parameter and the second 2-2 terminal unique parameter that are independent of each other. The method of claim 3,
Wherein the first sounding reference signal comprises a first periodic sounding reference signal and a first aperiodic sounding reference signal,
Wherein the second sounding reference signal comprises a second periodic sounding reference signal and a second aperiodic sounding reference signal,
Wherein the first terminal specific parameter includes a first terminal unique parameter for the first cyclic sounding reference signal and a first terminal unique parameter for the first aperiodic sounding reference signal,
Wherein the second terminal specific parameter includes a 2-1 terminal specific parameter for the second periodic sounding reference signal and a 2-2 terminal specific parameter for the second aperiodic sounding reference signal,
Wherein,
The first 1-1 terminal specific parameter and the second 1-1 terminal specific parameter that are independent of each other and the first 1-2 terminal specific parameter and the second 1-2 terminal specific parameter that are equal to each other. The method of claim 3,
Wherein the first sounding reference signal comprises a first periodic sounding reference signal and a first aperiodic sounding reference signal,
Wherein the second sounding reference signal comprises a second periodic sounding reference signal and a second aperiodic sounding reference signal,
Wherein,
A second terminal specific parameter identical to a first terminal specific parameter already set in the terminal,
Wherein the plurality of radio resource control configuration information comprises:
The first cyclic sounding reference signal and the second cyclic sounding reference signal including terminal specific parameters for each of the first periodic sounding reference signal and the first aperiodic sounding reference signal, And a second terminal specific parameter including a terminal specific parameter for each of the reference signals. The method according to claim 1,
Wherein,
And instructs the terminal using a semi-static configuration scheme. The method according to claim 1,
Wherein,
And instructs the terminal through dynamic signaling through a physical downlink control channel. 10. The method of claim 9,
Wherein,
And instructs the terminal using the bit information added to the downlink control information. 10. The method of claim 9,
Wherein,
And instructs the terminal using the remaining code point of the field included in the downlink control information.

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