KR101419936B1 - System and method for transmitting/receiving signal in a communication system - Google Patents

Abstract

A method for transmitting a signal of a base station in a communication system, the method comprising: a first communication system and a second communication system, wherein the second communication system transmits, to a system evolved in the first communication system, And transmitting a first message including common control information and frame control information for the first communication system in a first area of the frame, Transmitting a second message including common control information and frame control information for a first communication system to a first area and signaling location information of the second message transmitted in the second area;

Multiplexing mode, common control information, broadcast channel, L1 signaling, signal pattern, preamble, pilot, subcarrier set, sequence

Description

[0001] SYSTEM AND METHOD FOR TRANSMITTING / RECEIVING SIGNAL IN A COMMUNICATION SYSTEM [0002]

The present invention relates to a communication system, and more particularly, to a system and method for transmitting and receiving signals in a broadband wireless access communication system.

Communication systems are evolving to provide various services such as broadcast, multimedia, and multimedia messages. Particularly, in the next generation communication system, active research is being conducted to provide users with services with various high-speed QoS (Quality of Service: hereinafter referred to as 'QoS'). In addition, the next generation communication system is being developed to provide a data transmission speed of 100 Mbps or more to a high-speed mobile user and a data service of 1 Gbps or more to a low-speed mobile user, mainly in voice and packet data communication.

There is a portable Internet system as a system close to this next generation communication system. The portable Internet system is also called a Mobile WiMAX or WiBro communication system and is compatible with a communication system based on Institute of Electrical and Electronics Engineers (IEEE) 802.16.

The mobile WiMAX communication system is in the commercialization stage. Currently, a mobile WiMAX evolution communication system that has developed the mobile WiMAX communication system is being studied. The mobile WiMAX evolved evolution communication system aims at performance such as support for mobility up to 300 km / h, variable bandwidth support, and overhead minimization.

The mobile WiMAX evolution communication system tries to introduce evolved technologies. The evolved technologies include multi-antenna technology, multicast / broadcast service, and the like.

Meanwhile, if the mobile WiMAX communication system and the mobile WiMAX evolution communication system are implemented, there may be a system in which the mobile WiMAX communication system and the mobile WiMAX evolution communication system coexist. Accordingly, a system operation method capable of simultaneously supporting the operation of the mobile WiMAX evolution communication system in a system in which the mobile WiMAX communication system and the mobile WiMAX evolution communication system coexist, for example, a broadcast information transmission and transmission frame in the evolution system A scheme should be defined to provide indication information about the structure.

Accordingly, the present invention proposes a resource allocation system and method in a communication system.

Further, the present invention proposes a system and a method for transmitting and receiving signals in a communication system.

In addition, the present invention proposes a signal transmission / reception system and method for providing indication information on a broadcast information transmission structure and frame control information in a broadband wireless access communication system.

There is provided a method of transmitting a signal of a base station in a communication system, wherein a first communication system and a second communication system exist, and the second communication system is a system evolved in the first communication system, Transmitting a first message including common control information and frame control information for the first communication system in a first area of the frame, the first message including a control signal and a broadcast signal to be used; Transmitting a second message including common control information and frame control information for the second communication system in the second area, and signaling location information of the transmitted second message in the second area; Transmission method.

According to another aspect of the present invention, there is provided a signal reception method of a terminal in a communication system, wherein a first communication system and a second communication system exist, and the second communication system includes: Receiving a first message including common control information and frame control information of the first communication system in a first area of a frame, the first message including a control signal and a broadcast signal used in the system, Receiving a second message including common control information and frame control information of the second communication system in the second area and acquiring position information of the second message in the second area.

The present invention also provides a signal transmission system in a communication system, wherein a first communication system and a second communication system exist, and the second communication system is a system that evolves in the first communication system, And transmit a first message including common control information and frame control information for the first communication system in a first area of the frame, And a base station for transmitting the second message including the common control information and the frame control information for the second region and signaling the location information of the transmitted second message in the second region and transmitting the signal.

In addition, the present invention relates to a signal reception system in a communication system, wherein a first communication system and a second communication system exist, and the second communication system is used in the first communication system as an evolved system in the first communication system And to receive a first message including resource allocation information for the first communication system in a first region of the frame, wherein the second communication in the second region of the frame And a terminal for receiving a second message including resource allocation information for the system and obtaining position information of the second message in the second frame.
The present invention provides a signal reception method in a communication system, comprising: a third communication system in which a first communication system and a second communication system evolved in the first communication system coexist; and a fourth communication system in which the second communication system exists alone Determining whether a reference signal for the fourth communication system is received in a state where the communication system is present in a mixed state; and if the reference signal for the fourth communication system is not received, Receiving common control information for the second communication system, determining whether to receive common control information for the second communication system, and receiving common control information for the second communication system, And decoding the information.
According to another aspect of the present invention, there is provided a method of receiving a common control information of a mobile station belonging to the second communication system, the method comprising: receiving a first reference signal and acquiring synchronization; And receiving common control information at a predetermined position when receiving the second reference signal as a result of the discrimination.

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As described above, the present invention provides a frame structure in a communication system in which a first communication system and a second communication system coexist, and provides instruction information of a frame configured in the second communication system through L1 signaling, The communication system in which the second communication system coexists can be effectively operated, and in particular, the cochannel mode can be more efficiently supported by improving the BCH detection. Also, in the case of a third communication system in which the first communication system and the second communication system do not coexist and the second communication system alone exists, the SCH for the third communication system is provided so that various system operation modes can be effectively Can operate.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, only parts necessary for understanding the operation of the present invention are described, and other background techniques are omitted so as not to disturb the gist of the present invention.

In the embodiment of the present invention described below, a first communication system, for example, IEEE (Institute of Electrical and Electronics Engineers) 802.16 (hereinafter, referred to as " IEEE 802.16 ") communication system in a communication system such as a broadband wireless access (BWA) (Hereinafter referred to as " IEEE 802.16 communication system ") and a second communication system that improves the performance of the first communication system coexist, and the proposed frame structure And a signal transmission / reception system and method for providing direction information on the signal. Another embodiment of the present invention proposes a signal transmission / reception system and method in a case where only a third communication system, i.e., a second communication system, in which the second communication system does not coexist with the first communication system. For example, a wired / wireless network can be operated only with a second communication system in which a first communication system and a second communication system coexist and can provide improved performance.

Hereinafter, a communication system for improving the performance of the IEEE 802.16 communication system as an example of the IEEE 802.16 communication system as the first communication system and the second communication system as an example will be described in the following embodiments of the present invention The frame structure and the signal transmission and reception system and method proposed by the present invention can be applied to other communication systems such as a code division multiple access (CDMA), a wideband code division multiple access (WCDMA) The present invention can be applied to communication systems of a Wideband Code Division Multiple Access (WCDMA) and a Global System for Mobile Telecommunication (GSM) series.

In the embodiment of the present invention to be described later, the first communication system and the second communication system perform time division multiplexing (TDM) or frequency division multiplexing (FDM) Division Multiplexing (FDM) will be described below as an example. In addition, a mobile WiMAX communication system will be described as a first communication system and a mobile WiMAX evolution communication system will be described as a second communication system according to an embodiment of the present invention.

In the communication system according to the embodiment of the present invention, when the first communication system and the second communication system coexist, resources for the first communication system and the second communication system are allocated, Frame control information, and instructs the constructed frame control information through specific signaling. At this time, in the communication system according to the embodiment of the present invention, a broadcast channel (BCH) is proposed as a common control channel through which control information for the second communication system is transmitted, And informs the MS of the location information of the BCH area. Here, in the specific signaling method, L1 signaling corresponding to the signal characteristics and patterns in the frequency domain and the time domain is determined, and position information and decoding information of the BCH domain are obtained through the determined L1 signaling. Hereinafter, a frame structure in a communication system according to an embodiment of the present invention will be described with reference to FIG.

1 is a diagram schematically showing a frame structure in a communication system according to an embodiment of the present invention.

1, the frame 100 is downlinked (DL) by a Transmission Transition Gap (TTG) A DL subframe 110 and an uplink UL subframe 150 are distinguished from each other. The frame can be distinguished from the next frame by a receive transition gap (RTG) between the frame and the frame.

The DL subframe 110 includes a preamble region 112, a frame control header (FCH) region 114, a DL map (MAP) (UL-MAP) region 118 and a data burst region for transmitting and receiving data in the first communication system, (Hereinafter referred to as a 'first communication system area') 120 and an area for data transmission and reception of a second communication system (hereinafter referred to as a 'second communication system area') 122, The UL sub-frame 150 includes a first communication system area 152 and a second communication system area 154 as data burst areas.

The preamble region 112 is used for synchronization acquisition between the first communication system and the second communication system, that is, between the transceivers in the first and second communication systems, for example, a base station (BS) Synchronization acquisition between a mobile station (MS) and a mobile station (MS) and a preamble signal used for cell search are transmitted to the first communication system and the second communication system Is a region in which a preamble signal that can be commonly used is transmitted. Frame control information of the first communication system is transmitted through the FCH area 114 and the FCH is transmitted through the modulation and coding scheme applied to the MAP area, i.e., the DL-MAP area 116 and the UL-MAP area 118, Information about the lengths of the DL-MAP region 116 and the UL-MAP region 118, and the like. A DL-MAP message is transmitted in the DL-MAP region 116 and an UL-MAP message is transmitted in the UL-MAP region 118. The DL-MAP message includes position information on a DL burst area and an area, modulation and coding scheme information, and the like. The UL-MAP message includes position information on an UL burst area, modulation and coding scheme information, and the like.

For example, the FCH area 114 and the DL / UL-MAP areas 116 and 118 are subjected to a QPSK (Quadrature Phase Shift Keying) modulation scheme and a 1/12 or 1/16 coding rate, respectively.

Meanwhile, in the frame structure in which the first communication system and the second communication system coexist as described above, the first communication system and the second communication system must be able to operate independently of each other.

2A and 2B are views schematically showing a frame structure in a communication system according to an embodiment of the present invention. Here, FIGS. 2A and 2B are diagrams showing that the first communication system area and the second communication system area are TDM in the same frame, and the positions of the areas where the BCH information is transmitted are different.

Referring to FIGS. 2A and 2B, the frame may be divided into DL subframes 210 and 250 and UL subframes 230 and 280. The DL subframes 210 and 250 include a preamble field 212 and an FCH field 214 and a DL-MAP field 216 and a UL-MAP field 218 and 258, a first communication system region 220, 2 communication system areas 222, 262, 266, and BCH areas 224, 264. The UL subframes 230 and 280 include first communication system areas 232 and 282 and second communication system areas 234 and 284, which are data burst areas. 2B, reference numeral 266 may be a first communication system or a second communication system area.

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Meanwhile, the MS of the second communication system acquires synchronization using the preamble signal received through the preamble areas 212 and 252, and searches the BCH to acquire frame control information of the second communication system. The frame control information is included in the areas assigned to the second communication system in the DL subframes 210 and 250 and the areas and BCH areas 224 and 264 assigned to the second communication system in the UL subframes 230 and 280. [ That is, the MS of the second communication system does not decode the FCH (214, 254) and MAP information (216, 218, 256, 258) of the first communication system but uses the preamble signal of the first communication system And searches the BCH area of the second communication system.

The BCH areas 224 and 264 include frame configuration information, system and cell information of the second communication system. Accordingly, the MS of the second communication system recognizes the location of the BCH areas 224 and 264 and decoding information, and recognizes the frame configuration information of the second communication system when decoding the signals provided by the BCH areas 224 and 264 . The MS recognizes the second communication system areas 222, 262 and 266 in the DL subframes 210 and 250 and the second communication system areas 234 and 284 in the UL subframes 230 and 280. In this case,

At this time, the BCH areas 224 and 264 may be located in a predetermined area corresponding to the ratio of the DL area and the UL area and the coexistence ratio in the DL sub-frames 210 and 250 of the frame. Here, the predetermined area may be an area located temporally behind the second communication system area 210, 250. 2A, the BCH region may be located during the last time period from a specific time period of the DL subframe 210, or may be located in the second communication system region 262 and the first communication System area 266. In one embodiment, The BCH region may be configured as an arbitrary symbol interval or an Orthogonal Frequency Division Multiple Access (OFDMA) format.

2B, the BCH area 264 is divided into a second communication system area 262 and a first communication system area 266, as shown in FIG. 2B, The present invention can be equally applied to a case in which a user is located at a time zone between the user and the user or is located in another predetermined area.
In addition, the BCH areas 224 and 264 may be included in every frame or every predetermined period frame. Meanwhile, the DL region of the second communication system in the coexistence frame can be recognized through the information included in the BCH regions 224 and 264. In addition, a signal to be broadcast through the BCH area 224, 264 may have a coding rate lower than that of a signal broadcast in the first communication system.

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3A and 3B are diagrams illustrating DL subframes in a communication system according to an embodiment of the present invention. 3A and 3B are diagrams for explaining acquisition of position information of a BCH region through L1 signaling in a communication system according to an embodiment of the present invention.

3A, the DL subframe includes a preamble region 302, an FCH region 304, a DL-MAP region 306, a UL-MAP region 308, a first communication system region 310, a second communication system area 312, and a BCH area 314. The BCH region 314 includes a plurality of reference signal (RS) regions 31-1 to 316-4.

As described above, in order to detect the position of the BCH area 314 through the L1 signaling corresponding to the signal characteristic and the pattern in the frequency domain, the RS areas 316-1 to 316-4 Includes a reference signal (RS). Here, the reference signal is defined as a signal different from a reference signal in a channel other than the BCH, for example, a pilot signal, and the MS recognizes that the region including the reference signal is the BCH region 314. Here, the physical channel occupied by the BCH occupies a two-dimensional region formed by a time domain and a frequency domain as well as an OFDMA symbol unit.

That is, the MS of the second communication system acquires synchronization using the preamble signal transmitted through the preamble region 302, and then performs a Fast Fourier Transform (FFT) on the received signal And detects a L1 signaling, that is, a specific reference signal pattern, and determines that the corresponding time period is a time period corresponding to the BCH area 314. The specific reference signal pattern indicates that the MS has already recognized Therefore, the MS detects L1 signaling through correlation between a received signal and a previously known signal sequence.

3B, the DL subframe includes a preamble region 352, an FCH region 354, a DL-MAP region 356, a UL-MAP region 358, a first communication system region 360, a second communication system area 362, and a BCH area 364.

3B, the MS of the second communication system recognizes the BCH region 364 through a BCH preamble region 366 corresponding to a prior signal or a posterior signal pattern. Here, the BCH preamble region 366 may be positioned at a time point before the BCH region 364 to acquire position information of the BCH region 364 through a pre-signal pattern, or may be located at a time point after the BCH region 364, The position information of the BCH area 364 can be obtained through the pattern. The physical channel occupied by the BCH occupies a two-dimensional region formed by a time domain and a frequency domain, as well as an OFDMA symbol unit, or occupies a predetermined time domain And may occupy some or all of the frequency domain.

That is, the MS of the second communication system acquires synchronization using the preamble signal transmitted through the preamble region 352, and then performs FFT on the received signal, and transmits a pre-signal indicating the BCH region 366 or a post- That is, the L1 signaling and obtains the position information of the BCH area 364. [

The specific signaling scheme corresponding to the signal characteristics and patterns in the time domain includes a method of defining and using an OFDMA signal characteristic and a pattern obtainable through a set of subcarriers of a certain physical channel on which a BCH is transmitted, The OFDMA signal characteristic that can be obtained by mapping resources on a physical channel through which the BCH is transmitted according to a certain rule, that is, a method of defining and using a repeated pattern of a signal. For example, a signal transmitted through a set of subcarriers in a frequency domain of an OFDMA communication system has a time domain pattern repeated at the predetermined interval, and by defining such a repeated time domain pattern, Thereby obtaining the position of the BCH area by detecting the specific signaling. Herein, a method of defining and using the repetition pattern will be described in more detail. If a certain interval is M in the frequency domain, there are M repetition patterns of L sections through M subcarrier sets and FFT size Or the total number N of subcarriers is L × M. Accordingly, a signal transmitted in a subcarrier set of M subcarrier intervals can be expressed by Equation (1).

In Equation (1), n and l denote a subcarrier index, and m denotes a repeated pattern index. The signal expressed by Equation (1) is expressed by Equation (2) in the time domain.

이다. 도 4 a에서는 M=4 인 경우, 반복 패턴 인덱스 m에 따른 상기 수학식의 신호 패턴을 도시하고 있다. 참조번호 410은 m=0 인 경우를 도시하고 있으며, 참조번호 420은 m = 1 인 경우를 도시하고 있으며, 참조번호 430은 m = 2 인 경우를 도시하고 있으며, 참조번호 430은 m =3 인 경우를 도시하고 있다. 그에 따라, 상기 제2 통신 시스템의 MS는 동기화를 수행한 후, 시간 영역에서 수신 신호의 자기 상관도에 상응한 반복 특성을 검출하고, 상기 검출한 반복 특성이 상기 제2 통신 시스템의 BS와 MS 간에 미리 정의된 반복 특성을 만족할 경우 해당 위치로부터 BCH 영역의 위치 정보를 획득한다. 0, ..., N / M-1, p = 0, ..., M-1 in Equations (1)

to be. In FIG. 4A, when M = 4, the signal pattern of the above equation according to the repeated pattern index m is shown. Reference numeral 410 denotes a case where m = 0, reference numeral 420 denotes a case of m = 1, reference numeral 430 denotes a case of m = 2, reference numeral 430 denotes a case where m = 3 FIG. Accordingly, after performing synchronization, the MS of the second communication system detects a repetition characteristic corresponding to the autocorrelation of the received signal in the time domain, and the detected repetition characteristic is detected by the BS of the second communication system and the MS The location information of the BCH area is obtained from the corresponding location.

4A and 4B are diagrams illustrating symbols of a BCH region in a DL subframe in a communication system according to another embodiment of the present invention.

Referring to FIG. 4A, an L1 signaling scheme corresponding to a signal characteristic and a pattern in the time domain defines patterns of an arbitrary subcarrier set, and corresponds to a correlation of a sequence transmitted in the defined plurality of patterns The location of the BCH and the transmission mode of the BCH jointly. For example, the BCH transmission mode is as follows. In this case, each BCH transmission mode assumes a QPSK, a coding rate = 1/2, and a convolutional code (CC). Here, the BCH transmission mode includes a transmission diversity scheme, a modulation and coding scheme (MCS), a repetition number, a channel coding scheme, a period and interval information, and the like.

1. Single transmission antenna, period: 2 slots, interval: 24 slots, number of repetitions: 12

2. Single transmit antenna, period: 2 slots, interval: 48 slots, repeat count: 24

3. An apparatus and method for performing transmission antenna diversity such as Space-Frequency Block-Coded (SFBC) (hereinafter, referred to as " MIMO " Method), period: 2 slots, interval: 24 slots, number of repetitions: 12

4. MIMO transmission antenna diversity, period: 2 slots, interval: 48, repetition frequency: 24

For example, pattern 1 410 may use a set of 4k subcarriers as a signal pattern, and pattern 440 may be used as a signal pattern. 2 420 uses a set of 4k + 1 subcarriers as a signal pattern, Pattern 3 430 uses a set of 4k + 2 subcarriers as a signal pattern, and pattern 4 440 uses a set of 4k + 3 subcarriers A set of carriers is used as a signal pattern. Where k is 0, ..., N / 4, and N is the FFT size.

Also, a plurality of sequences can be defined and used in the same pattern by the set of subcarriers as described above. At this time, the correlation between a signal received through the same pilot pattern and a defined plurality of sequences is measured, To obtain the BCH transmission mode. That is, in order to support more various transmission modes, a part of the transmission mode is specified as a pattern by a subcarrier set, and a plurality of sequences for each pattern acquire transmission mode information hierarchically by specifying the rest of the transmission modes can do. Accordingly, various sequences transmitted in the same pattern as well as various repeat patterns can be defined. In addition, the MS of the second communication system measures not only the correlation characteristics in the time domain but also the received power of each subcarrier set in the frequency domain by performing FFT on the received signal, detects a subcarrier set having the largest received power, And acquires position information of the BCH area. Then, the BCH transmission mode is detected by measuring the degree of correlation with the sequence according to the transmission mode in which the sequence transmitted in the detected subcarrier set is known in advance.

Referring to FIG. 4B, the L1 signaling scheme corresponding to the signal characteristics and the pattern in the time domain uses a predetermined repetition sequence during BCH transmission, and cyclically delays the BCH signal having the repetition characteristics in the time domain. Or cyclic shift to transmit the signal, thereby acquiring position information of the BCH region. At this time, if the BCH signal having a predetermined repetition characteristic is cyclically delayed or circulated by a predetermined value in the time domain, the BCH signal can be expressed by Equation (3).

In Equation (3), X _k denotes a signal transmitted through a physical channel to which a BCH is mapped, N denotes an FFT size, T _g denotes an offset between repetitive sequences, N _CS denotes a BCH signal, Quot; refers to a cyclic delay or cyclic shifted value.

For example, when using a signal pattern that is repeated twice in the time domain using an odd-numbered subcarrier set at the time of BCH transmission, a pattern due to a cyclic delay or a cyclic shift can be configured into four patterns, ) Uses the repeated sequence by cyclically shifting by 0 × N / 4 samples, Pattern 2 (470) uses the repeated sequence by cyclically shifting the repeat sequence by 1 × N / 4 samples, and Pattern 3 (480) The sequence is used by cyclically shifting by 2 × N / 4 samples, and pattern 4 (490) is used by circulating the repeated sequence by 3 × N / 4 samples. In this case, when M patterns are defined, a different sequence of delay or movement is defined in consideration of cyclic delay or cyclic shift of N / M samples, and the signal pattern is used. Accordingly, the MS of the second communication system obtains the positional information of the BCH region as described above in accordance with the correlation of the repetition signal in the time domain. Hereinafter, an operation of acquiring BCH information in a communication system according to an embodiment of the present invention will be described with reference to FIG.

5 is a diagram illustrating a process of acquiring a BCH location of an MS in a communication system according to an embodiment of the present invention.

Referring to FIG. 5, in step 501, the MS of the second communication system acquires synchronization using a preamble signal transmitted through a preamble area, and if the synchronization is obtained, the MS proceeds to step 503 and confirms L1 signaling detection. That is, if the MS of the second communication system detects an L1 signaling method determined in accordance with a signal characteristic and a pattern in a frequency domain or a time domain in step 503, the MS proceeds to step 505. In step 505, Obtain the location.

6 is a diagram illustrating a process of acquiring BCH transmission mode information of an MS in a communication system according to an embodiment of the present invention.

Referring to FIG. 6, in step 601, the MS of the second communication system obtains synchronization using a preamble signal transmitted through a preamble area, and proceeds to step 603 to determine whether L1 signaling is detected. If the MS detects L1 signaling in step 603, the BS recognizes the BCH corresponding to the detected L1 signaling and proceeds to step 605. In step 605, In step 605, the MS acquires BCH transmission mode information and proceeds to step 607. [

In step 607, the MS decodes the control information and the broadcast information received through the BCH area according to the confirmed BCH transmission mode, and proceeds to step 609. In step 607, Here, the BCH transmission mode may exist in various cases as described above. In this case, the BCH transmission mode may have various MCS levels for each BCH transmission mode, or may have a basic MCS level, for example, QPSK 1/2. In step 609, the MS decodes the BCH according to the obtained BCH decoding information. Hereinafter, a structure of an MS in a communication system according to an embodiment of the present invention will be described with reference to FIG.

Hereinafter, an operation of determining the operation mode between the first communication system and the second communication system in the communication system according to the embodiment of the present invention will be described with reference to FIG. At this time, the first communication system and the second communication system coexist in the same frame. In addition, depending on the cell situation, initial access to an arbitrary system or handover to an arbitrary system can be considered.

7 is a diagram illustrating a process of determining an operation mode of an MS between a first communication system and a second communication system in a communication system according to an embodiment of the present invention.

Referring to FIG. 7, in step 701, the MS searches for a preamble signal to acquire synchronization, and proceeds to step 703. In step 703, the MS determines whether it detects the BCH of the second communication system. As a result of the determination, if the BCH is not detected, the MS determines in step 705 that the communication service provided by the first communication system is provided, i.e., operates in the first communication system, and decodes the FCH in step 707 And obtains control information of the first communication system.

On the other hand, if it is determined in step 703 that the BCH of the second communication system is detected, the MS determines that the communication service provided by the second communication system is provided to the MS in step 709, that is, operates in the second communication system And decodes the BCH in step 711 to acquire control information and broadcast information of the second communication system.

In addition, in step 703, the BCH detection does not check the BCH detection but can compare the decoding and detection probabilities of the common control information of the two systems. That is, the BCH detection probability of the second communication system and the FCH decoding probability of the first communication system can be compared. If the BCH detection probability of the second communication system is greater than the FCH decoding probability of the first communication system, the BS proceeds to step 709 and if the BCH detection probability of the second communication system is less than the FCH decoding probability of the first communication system, And switches to the corresponding communication system operation mode.

Hereinafter, an operation scheme in a case where the first communication system and the second communication system do not coexist in the communication system according to the embodiment of the present invention and the second communication system exists alone will be described. Hereinafter, a communication system in which the second communication system exists alone is referred to as a third communication system in order to distinguish it from the first communication system and the second communication system.

8 schematically shows a frame structure for a third communication system according to an embodiment of the present invention.

Referring to FIG. 8, when the second system operates as a third system that does not coexist with the first system but exists alone, an area capable of independently performing synchronization for the third communication system must be provided. The third frame includes a synchronization channel (SCH) region 803 in which synchronization and control signals are transmitted. And includes a BCH area 801 through which common control information and broadcast information are transmitted.

Meanwhile, the position of the BCH area 801 may be indicated in the SCH area 803. That is, instead of searching for the position of the BCH area 801 through a specific detection method, it is possible to indicate the position of the BCH area 801 through the SCH area 803. The BCH area indicated in the SCH area 803 of the F frame may be located in the (F + 1) -th frame.

9 is a diagram illustrating a process of determining an operation mode of an MS in a communication system according to an embodiment of the present invention.

Referring to FIG. 9, in step 902, the MS determines whether an SCH region for a third communication system exists in a frame. As a result of the determination, if the SCH region for the third communication system exists in the frame, the process proceeds to step 904. In step 904, the MS recognizes that it operates as a third communication system, and proceeds to step 906. In step 906, the MS acquires synchronization through the SCH region and proceeds to step 908. [ In step 908, the MS decodes the BCH including common control information and broadcast information to obtain control information and broadcast information for the third communication system.

On the other hand, if the SCH for the third communication system does not exist in the frame in step 902, the process proceeds to step 910. In step 910, the MS acquires synchronization using the preamble signal of the first communication system, and proceeds to step 912. In step 912, the MS determines whether a BCH area for a second communication system exists in a frame. If the BCH area is present in the frame, the process proceeds to step 914; otherwise, the process proceeds to step 918.

In step 914, the MS recognizes that it should operate as a second communication system, and proceeds to step 916. In step 916, the MS decodes the BCH of the second communication system.

On the other hand, if the BCH region for the second communication system does not exist in the frame in step 912, the MS recognizes that the MS operates as a first communication system in step 918, and proceeds to step 920. In step 920, the MS decodes the FCH of the first communication system. In the above, the BCH for the second communication system and the BCH for the third communication system may have the same form and may have different forms.

10 is a diagram schematically showing the structure of an MS in a communication system according to an embodiment of the present invention.

10, the MS 1000 includes a synchronizer 1010 for acquiring synchronization using a preamble signal transmitted through a preamble region, a common control information detector (for example, And a switching unit 1030 for switching with the first communication system modem 1040 or the second communication system modem 1050 to operate in an operation mode determined in accordance with whether the common control information is detected or not. Hereinafter, the operation of the MS in the communication system according to the embodiment of the present invention has been described in detail, and a detailed description thereof will be made herein.

11 is a diagram schematically illustrating the structure of an MS in a communication system according to an embodiment of the present invention.

11, the MS 1100 includes a first synchronizer 1110 for detecting and synchronizing with the SCH for synchronization of the third communication system, a third synchronizer 1110 corresponding to the SCH detection, A second communication system modem 1150 and a second communication system modem 1150. The first communication system modem 1150 and the second communication system modem 1150 are the same as those of the first communication system.

When the SCH of the third communication system is detected through the first synchronizer 1110, the MS 1100 operates to be compatible with the third communication system. If the SCH is not detected, the second synchronizer 1115 acquires synchronization using the preamble signal transmitted in the first communication system. The common control channel detector 1120 can detect the BCH of the second communication system and determine the operating mode. Since the determination of the operation mode of the MS has been described in detail in the foregoing, a detailed description thereof will be omitted here.

12 is a diagram illustrating a process of determining an operation mode of an MS in a communication system according to an embodiment of the present invention.

Referring to FIG. 12, in step 1202, the MS determines whether an SCH region for the first communication system, that is, a reference signal region exists in a frame. As a result of the determination, if the SCH region for the first communication system exists in the frame, the BS proceeds to step 1204. In step 1204, the MS performs synchronization using the preamble of the first communication system, and proceeds to step 1206. [ In step 1206, the MS determines whether the BCH of the second communication system can be detected. As a result of the determination, if the BCH is detected, the MS operates as a second communication system in step 1208 and proceeds to step 1210. In step 1210, the MS decodes the BCH of the second communication system.

On the other hand, if the BCH detection of the second communication system fails in step 1206, the MS recognizes in step 1212 that the MS should operate as the first communication system and proceeds to step 1214. In step 1214, the MS decodes the FCH of the first communication system.

If the SCH is not the SCH of the first communication system in step 1202, the MS determines whether the SCH of the third communication system exists. If it is determined that the SCH exists in the third communication system, the MS operates as a third communication system in step 1218 and proceeds to step 1220. [ In step 1220, the MS acquires synchronization through the SCH of the third communication system and proceeds to step 1222. In step 1222, the MS decodes the BCH of the third communication system.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Therefore, the scope of the present invention should not be limited by the illustrated embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

1 schematically shows a frame structure in a communication system according to an embodiment of the present invention;

2A and 2B schematically illustrate a frame structure in a communication system according to an embodiment of the present invention;

3A and 3B illustrate DL subframes in a communication system according to an embodiment of the present invention;

4A and 4B illustrate DL subframes in a communication system according to another embodiment of the present invention.

5 is a diagram illustrating a process of acquiring BCH location information in a communication system according to an embodiment of the present invention.

6 is a diagram illustrating a process of determining an operation mode between a first communication system and a second communication system in a communication system according to an embodiment of the present invention.

7 is a diagram illustrating a process of acquiring BCH decoding information in a communication system according to an embodiment of the present invention.

Figure 8 schematically illustrates the structure of an MS in a communication system according to an embodiment of the present invention;

9 is a diagram illustrating a process of determining an operation mode of an MS in a communication system according to an embodiment of the present invention.

10 schematically illustrates the structure of an MS in a communication system according to an embodiment of the present invention;

11 schematically illustrates the structure of an MS in a communication system according to an embodiment of the present invention.

12 is a diagram illustrating a process of determining an operation mode of an MS in a communication system according to an embodiment of the present invention.

Claims (54)

A method for transmitting a signal of a base station in a wireless communication system, And transmitting a signal using a frame for a first communication system and a second communication system which is an evolved communication system in the first communication system, Wherein the frame includes a first area for transmitting a synchronous signal commonly used in the first communication system and the second communication system and a second area for transmitting a first frame control including information on a subframe assigned to the first communication system A second area for transmitting information and a third area for transmitting second frame control information including information on a subframe assigned to the second communication system, Wherein the third region is used to transmit a reference signal indicating that the second frame control information is transmitted. The method according to claim 1, Wherein the reference signal is a signal having a predetermined pattern in the frequency domain. delete delete A method for transmitting a signal of a base station in a wireless communication system, And transmitting a signal using a frame for a first communication system and a second communication system which is an evolved communication system in the first communication system, Wherein the frame includes a first area for transmitting a synchronous signal commonly used in the first communication system and the second communication system and a second area for transmitting a first frame control including information on a subframe assigned to the first communication system A second area for transmitting information, a third area for transmitting second frame control information including information on a sub-frame allocated to the second communication system, and a second area for transmitting the second frame control information And a fourth region for transmitting a reference signal for recognizing a third region. 6. The method of claim 5, wherein the reference signal is a signal having a predetermined pattern in a time domain. 6. The method of claim 5, Wherein the reference signal is a signal having a pre-signal pattern indicating that the fourth region exists before the third region in a time domain. 6. The method of claim 5, Wherein the reference signal is a signal having a post signal pattern indicating that the fourth region is present in the time domain after the third region. delete The method according to claim 6, Wherein the predetermined pattern is generated by transmitting a set of subcarriers that are repeated in the time domain and including subcarriers having a predetermined interval in the frequency domain for a predetermined time period. delete delete delete The method according to claim 6, Wherein the predetermined pattern includes a pattern generated by cyclic delay or cyclic shift of a sequence constituting one pattern by a predetermined size. A method for receiving a signal of a terminal in a wireless communication system, Receiving a signal using a frame for a first communication system and a second communication system which is an evolved communication system in the first communication system, Wherein the frame includes a first area for receiving a synchronization signal commonly used in the first communication system and the second communication system and a second area for receiving a first frame control including information on a subframe assigned to the first communication system A second area for receiving information and a third area for receiving second frame control information including information on a subframe assigned to the second communication system, Wherein the third region is used for receiving a reference signal indicating that the second frame control information is transmitted. 16. The method of claim 15, Wherein the reference signal is a signal having a predetermined pattern in the frequency domain. A method for receiving a signal of a terminal in a wireless communication system, Receiving a signal using a frame for a first communication system and a second communication system which is an evolved communication system in the first communication system, Wherein the frame includes a first area for receiving a synchronization signal commonly used in the first communication system and the second communication system and a second area for receiving a first frame control including information on a subframe assigned to the first communication system A third area for receiving second frame control information including information on a subframe assigned to the second communication system, and a second area for receiving the second frame control information, And a fourth region for receiving a reference signal for recognizing a third region. 18. The method of claim 17, Wherein the reference signal is a signal having a predetermined pattern in a time domain. 18. The method of claim 17, Wherein the reference signal is a signal having a pre-signal pattern indicating that the fourth region exists before the third region in a time domain. 18. The method of claim 17, Wherein the reference signal is a signal having a post-signal pattern indicating that the fourth region is present after the third region in a time domain. 19. The method of claim 18, Wherein the predetermined pattern is repeated in the time domain and is generated by transmitting a set of subcarriers including subcarriers having a predetermined interval in the frequency domain for a predetermined time period. 19. The method of claim 18, Wherein the predetermined pattern includes a pattern generated by cyclic delay or cyclic shift of a sequence constituting one pattern by a predetermined size. A base station in a wireless communication system, And a transmitter for transmitting a signal using a frame for a first communication system and a second communication system which is an evolved communication system in the first communication system,  Wherein the frame includes a first area for transmitting a synchronous signal commonly used in the first communication system and the second communication system and a second area for transmitting a first frame control including information on a subframe assigned to the first communication system A second area for transmitting information and a third area for transmitting second frame control information including information on a subframe assigned to the second communication system, Wherein the third region is used for transmitting a reference signal indicating that the second frame control information is transmitted. 24. The method of claim 23, Wherein the reference signal is a signal having a predetermined pattern in the frequency domain. delete delete A base station in a wireless communication system, And a transmitter for transmitting a signal using a frame for a first communication system and a second communication system which is an evolved communication system in the first communication system, Wherein the frame includes a first area for transmitting a synchronous signal commonly used in the first communication system and the second communication system and a second area for transmitting a first frame control including information on a subframe assigned to the first communication system A second area for transmitting information, a third area for transmitting second frame control information including information on a sub-frame allocated to the second communication system, and a second area for transmitting the second frame control information And a fourth region for transmitting a reference signal for recognizing a third region. 28. The method of claim 27, Wherein the reference signal is a signal having a predetermined pattern in a time domain. 28. The method of claim 27, Wherein the reference signal is a signal having a pre-signal pattern indicating that the fourth region exists before the third region in a time domain. 28. The method of claim 27, Wherein the reference signal is a signal having a post-signal pattern indicating that the fourth region exists after the third region in a time domain. delete 29. The method of claim 28, Wherein the predetermined pattern is generated by transmitting a set of subcarriers that are repeated in the time domain and including subcarriers having a predetermined interval in the frequency domain for a predetermined time period. delete delete delete 29. The method of claim 28, Wherein the predetermined pattern includes a pattern generated by cyclic delay or cyclic shift of a sequence constituting one pattern by a predetermined size. In a terminal in a communication system, And a receiver for receiving a signal using a frame for a first communication system and a second communication system which is an evolved communication system in the first communication system, Wherein the frame includes a first area for receiving a synchronization signal commonly used in the first communication system and the second communication system and a second area for receiving a first frame control including information on a subframe assigned to the first communication system A second area for receiving information and a third area for receiving second frame control information including information on a subframe assigned to the second communication system, Wherein the third region is used for receiving a reference signal indicating that the second frame control information is transmitted. 39. The method of claim 37, Wherein the reference signal is a signal having a predetermined pattern in the frequency domain. A terminal in a wireless communication system, And a receiver for receiving a signal using a frame for a first communication system and a second communication system which is an evolved communication system in the first communication system, Wherein the frame includes a first area for receiving a synchronization signal commonly used in the first communication system and the second communication system and a second area for receiving a first frame control including information on a subframe assigned to the first communication system A third area for receiving second frame control information including information on a subframe assigned to the second communication system, and a second area for receiving the second frame control information, And a fourth region for receiving a reference signal for recognizing a third region. 40. The method of claim 39, Wherein the reference signal is a signal having a predetermined pattern in a time domain. 40. The method of claim 39, Wherein the reference signal is a signal having a pre-signal pattern indicating that the fourth region exists before the third region in a time domain. 40. The method of claim 39, Wherein the reference signal is a signal having a post signal pattern indicating that the fourth region exists in the time domain after the third domain. 41. The method of claim 40, Wherein the predetermined pattern is repeated in the time domain and is generated by transmitting a set of subcarriers including subcarriers having a predetermined interval in the frequency domain for a predetermined time period. 41. The method of claim 40, Wherein the predetermined pattern includes a pattern generated by cyclic delay or cyclic shift of a sequence constituting one pattern by a predetermined size. A method for receiving a signal of a terminal in a wireless communication system, Determining whether a first synchronization signal for performing synchronization with the second communication system is received in a first mode in which a second communication system, which is an advanced communication system in the first communication system, is used alone; When the first synchronization signal is not received, transitioning to a second mode in which both the first communication system and the second communication system can be used; Receiving a second synchronization signal from the first communication system and performing synchronization with the first communication system; Determining whether common control information for using the second communication system is received, And decoding the common control information and performing an operation for using the second communication system when the common control information is received. 46. The method of claim 45, Receiving a frame control header of the first communication system when the common control information is not received; And decoding the frame control header to perform an operation for using the first communication system. 46. The method of claim 45, Performing synchronization with the second communication system using the first synchronization signal when the first synchronization signal is received; And receiving and decoding the common control information to perform an operation for using the second communication system. delete 46. The method of claim 45, Wherein the first synchronization signal includes information indicating an area in which the common control information in the frame is transmitted. A method for receiving common control information of a terminal belonging to the second communication system in a wireless communication system including a first communication system and a second communication system, Receiving a first reference signal commonly used in the first communication system and the second communication system to obtain synchronization; Determining whether a second reference signal for the second communication system is received, And receiving common control information using a predetermined resource according to the second reference signal when the second reference signal is received. 51. The method of claim 50, Wherein the first reference signal is a preamble signal used for synchronization acquisition between a terminal belonging to the first communication system and a terminal connected to the second communication system. 51. The method of claim 50, Wherein the second reference signal is a signal used by the terminal belonging to the second communication system to determine whether the common control information is transmitted from the base station. 51. The method of claim 50, Wherein the predetermined resource includes a resource corresponding to at least one symbol interval after the symbol interval in which the second reference signal is received. 51. The method of claim 50, Wherein the predetermined resource includes resources corresponding to at least one symbol interval and a predetermined frequency band after a symbol interval in which the second reference signal is received.

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