WO2015053553A1 - Method for transmitting and receiving random access response, and apparatus therefor - Google Patents

Method for transmitting and receiving random access response, and apparatus therefor Download PDF

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Publication number
WO2015053553A1
WO2015053553A1 PCT/KR2014/009471 KR2014009471W WO2015053553A1 WO 2015053553 A1 WO2015053553 A1 WO 2015053553A1 KR 2014009471 W KR2014009471 W KR 2014009471W WO 2015053553 A1 WO2015053553 A1 WO 2015053553A1
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WO
WIPO (PCT)
Prior art keywords
random access
access response
terminal
sub
access preamble
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PCT/KR2014/009471
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French (fr)
Korean (ko)
Inventor
박규진
최우진
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주식회사 케이티
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Priority to KR20130120267 priority Critical
Priority to KR10-2013-0120267 priority
Priority to KR10-2013-0132334 priority
Priority to KR20130132334 priority
Priority to KR20140084249A priority patent/KR20150042689A/en
Priority to KR10-2014-0084249 priority
Priority to KR1020140099563A priority patent/KR20150051303A/en
Priority to KR10-2014-0099563 priority
Application filed by 주식회사 케이티 filed Critical 주식회사 케이티
Publication of WO2015053553A1 publication Critical patent/WO2015053553A1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access, e.g. scheduled or random access
    • H04W74/002Transmission of channel access control information
    • H04W74/006Transmission of channel access control information in the downlink, i.e. towards the terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access, e.g. scheduled or random access
    • H04W74/08Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0833Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure

Abstract

As a method for allocating a PDSCH resource for transmitting an RAR message for an MTC terminal, the present invention provides a method for allocating a semi-static PDSCH resource for transmitting RAR, not a dynamic scheduling through a PDCCH, and an apparatus therefor. Further, the present invention provides a method for performing, by a base station, random access procedures, and an apparatus therefor, the method comprising the steps of: receiving a random access preamble; forming a random access response related to the random access preamble or forming a random access response EPDCCH set on the basis of the format of a random access response message; and transmitting the random access response.

Description

The random access response receiving method and apparatus

When the present invention is to be transmitted and received to and, more particularly, repeated a random access response to the terminal located in the improved coverage than the coverage for the general terminal, to a method and apparatus for transmitting and receiving a random access response in a wireless communication system, a random access to determine a resource allocation response is a method and apparatus for transmitting and receiving a random access response.

The present invention also relates to a random access response transmitting method and device according to the random access procedure of the UE requesting increased coverage compared to a coverage for the general terminal.

The mechanical form of communication (machine to machine) (machine type communication, hereinafter "MTC" communication quot;) is one or more objects in a form of data communication must be between the devices or objects that do not require human interaction communication . MTC communication that does not require human interaction & quot; refers to any communication method in which communication is made without human intervention in the communication process.

MTC terminals can be installed in the radio environment bad place compared to normal terminals. To MTC terminal is operating in a bad radio environment location than conventional terminals, it may be necessary to transmit repeatedly to the control information and / or data for each physical channel to be transmitted in only one subframe in a plurality of sub-frames.

On the other hand, the random access response (referred to as a Random Access Response, hereinafter "RAR") for the general terminal is not repeatedly transmitted from a plurality of sub-frames, the random resource access response is allocated is transmitted by repeating the random access response It may be determined without considering.

On the other hand, the UE can perform the random access (Random Access) process in the base station and the initial access procedure. A random access procedure in order to MTC terminal repeatedly transmitted a random access response message, and receiving a random access response, the terminal also repeatedly MTC should combining (combining). However, this process has a problem that causes an excessive load (overhead) in the control region, or data region.

The present invention is to provide a method and apparatus for determining the resource that is the random access response allocated receiving a random access response when transmitting by repeating a random access response for the MTC terminal in a plurality of sub-frames in order to overcome the above problems the purpose.

Further, an object of the present invention is to provide a method and apparatus for reducing the excessive load due to the repeated transmission in case of transmitting a random access response for a coverage limited UE MTC.

Further, an object of the present invention is to provide a method and apparatus for providing a proper amount of radio resources according to the size of the random access response in the case of transmitting the random access response via the PDSCH fixed resources.

One embodiment of the invention, between the UE randomly as a method of receiving the access response, the UE a random sub-frame for transmitting the access preamble and the mobile station a subframe for receiving a random access response related to the random access preamble receiving a sub-frame information indicative of the relationship; Transmitting a random access preamble; It provides a method of receiving a random access response related to the random access preamble through the subframe determined on the basis of the sub-frame information. Further, the sub-frame information, there is provided a method comprising the information indicative of the difference between the sub-frame to sub-frame and the terminals of the terminal transmitting the random access preamble received the random access response. Further, the sub-frame information, there is provided a method comprising the information indicating the index of the subframe in which the UE receives the random access response. Further, the sub-frame information, there is provided a method comprising the information and the information of a subframe of a radio frame that the UE receives the random access response. In addition, the in step of the sub-frame information receives a plurality of candidate values, and the random access response, the user terminal characterized in that an attempt to receive the random access response using the respective candidate values to provide. In addition, the random access preamble is received is repeated over a plurality of subframes, that the number of the plurality of sub-frames is determined based on at least one of a format of a repetitive transmission number and the random access preamble of the random access preamble It provides a method as claimed. In addition, the random access preamble is received is repeated over a plurality of sub-frames, provides a method further comprising the step of receiving information indicating the number of the plurality of sub-frames.

Another embodiment of the invention, further comprising a terminal as a method of receiving a random access response, determining a resource block in which a random access response is allocated; Transmitting a random access preamble; And through the determined resource block provides a method of receiving a random access response related to the random access preamble. Further, in the step of determining resource blocks to which the random access response is allocated, the number and position of the resource blocks of the resource block provides a method, characterized in that set in advance. Further, in the step of determining resource blocks to which the random access response is allocated, the position of the number of the resource block is set in advance the resource blocks to at least one of the indices of the downlink bandwidth, an index of the sub-frame, and the slot It provides a method, characterized in that is determined based. Further, in the step of determining resource blocks to which the random access response is allocated, information on resource blocks to which the random access response is allocated, there is provided a method characterized in that the reception from the base station.

The relationship between another embodiment of the present invention, the base station is random as a method of transmitting the access response, the UE a random sub-frame for transmitting the access preamble and the mobile station a subframe for receiving a random access response related to the random access preamble sending a sub-frame information indicating; Receiving a random access preamble; It provides a method for sending a random access response related to the random access preamble through the subframe determined on the basis of the sub-frame information. Further, the sub-frame information, there is provided a method comprising the information indicative of the difference between the sub-frame to sub-frame and the terminals of the terminal transmitting the random access preamble received the random access response. Further, the sub-frame information, there is provided a method comprising the information indicating the index of the subframe in which the UE receives the random access response. Further, the sub-frame information, there is provided a method comprising the information of the information and the sub-frame of the radio frame (radio frame) in which the terminal receives the random access response. Further, the sub-frame information, there is provided a method characterized in that it comprises a plurality of candidate values. In addition, the random access preamble is transmitted is repeated over a plurality of sub-frames, provides a method further comprising transmitting information indicating the number of the plurality of sub-frames.

Another embodiment of the invention, the method comprising: the base station is a method for sending a random access response, and transmits the information on the resource blocks to which the random access response is allocated to the terminal; Receiving a random access preamble; It provides a method for sending a random access response related to the random access preamble via the resource block.

Another embodiment of the present invention, a terminal for receiving a random access response, sending unit for sending a random access preamble; And the random access preamble includes a receiving unit receiving a random access response related to, and the receiver, prior to sending the random access preamble, the terminal is the random access preamble through the subframe determined on the basis of the sub-frame information the sub-frame and the MS to transfer provides a terminal, characterized in that for receiving a sub-frame information indicative of the relationship between the sub-frame for receiving the random access response related to the random access preamble. Further, the sub-frame information, and provides a terminal comprising the information indicative of the difference between the sub-frame to sub-frame and the terminals of the terminal transmitting the random access preamble received the random access response. Further, the sub-frame information, and provides the terminal comprises information indicating the index of the subframe in which the UE receives the random access response. Further, the sub-frame information, and provides a terminal comprising the information of the information and the sub-frame of the radio frame (radio frame) in which the terminal receives the random access response. In addition, the subframe information comprises a plurality of candidate values, the receiver provides the terminal, characterized in that attempting to receive the random access response using the respective candidate values. In addition, the random access preamble is received is repeated over a plurality of subframes, that the number of the plurality of sub-frames is determined based on at least one of a format of a repetitive transmission number and the random access preamble of the random access preamble It provides a terminal according to claim. In addition, the random access preamble is received is repeated over a plurality of sub-frames, the reception unit provides a terminal, characterized in that for receiving information indicating the number of the plurality of sub-frames.

Another embodiment of the present invention, a terminal for receiving a random access response, the control for determining the resource blocks to which the random access response is allocated; Transmission unit for transmitting a random access preamble; And through the determined resource block provides a terminal comprising a receiver configured to receive a random access response related to the random access preamble. In addition, the number of the resource block is set in advance and the position of the resource block provides a terminal, characterized in that is determined based on a down-link bandwidth, at least one of the index, and the index of the slot in the subframe. In addition, information about the resource blocks to which the random access response allocation provides a terminal, characterized in that the reception from the base station through the receiver.

Another embodiment of the invention, a base station transmitting a random access response, receiving unit receiving a random access preamble; And the transmitting section, prior to receiving the random access preamble, the sub-frame and the terminal is the random access that the UE transmits the random access preamble, and a transmitter for transmitting a random access response related to the random access preamble It provides a base station, characterized in that for transmitting the sub-frame information indicative of the relationship between the sub-frame for receiving a random access response related to a preamble. Further, the sub-frame information, and provides a base station comprising the information indicative of the difference between the sub-frame to sub-frame and the terminals of the terminal transmitting the random access preamble received the random access response. Further, the sub-frame information, and provides a base station characterized in that it comprises information indicating the index of the subframe in which the UE receives the random access response. Further, the sub-frame information, and provides a base station characterized in that it comprises the information of the information and the sub-frame of the radio frame (radio frame) in which the terminal receives the random access response. Further, the sub-frame information, and provides the base station comprises a plurality of candidate values. In addition, the random access preamble is transmitted is repeated over a plurality of sub-frames, the transmitter provides a base station according to claim 1, further sends information indicating a number of the plurality of sub-frames.

Another embodiment of the invention, a base station transmitting a random access response, receiving unit receiving a random access preamble; And a sending unit for sending a random access response related to the random access preamble, wherein the transmitter, characterized in that prior to receiving the random access preamble, and transmits the information on the resource blocks to which the random access response allocated to a terminal It provides a base station of.

On the other hand, another embodiment of the present invention, the base station A method for performing a random access procedure, on the basis of receiving a random access preamble as a random access response message formats configured for the random access response related to the random access preamble or the random access response is provided a method for sending a stage and a random access response configuring the EPDCCH set. In the case based on the random access response message is the random access response format is configured, the random access response is directed to a method that is sent through the search space, which is set by the random access response message format. Furthermore, the search space of a PRB or a VRB is, the DL system band width total PRB number, slot number, and the number and the RA-RNTI of the PRB for the random access response message formats that make up the set by the random access response message formats It provides a process that is determined by the function. In the case to which the random access response configuring the basis of the random access response message formats, RA-RNTI value of the random access response is determined by one or more of the number of iterations, and the random access response message The format of the random access preamble It provides a way to be. Further, when configuring the random access response EPDCCH set, the random access response is directed to a method that is transmitted through the random access response EPDCCH set. Further, when configuring the random access response EPDCCH three and provides a method further comprising the step of transmitting the random access response EPDCCH set of configuration information. In addition, the random access response EPDCCH set configuration information, provides a method for transmitting through the cell specific higher layer signaling.

Another embodiment of the invention, the terminal is a method for performing random access procedures, monitoring, or random access response EPDCH set configure at least one search space, which is set for each step as a random access response message format for transmitting a random access preamble on the basis of the information in accordance with the step and monitoring the results of monitoring the random access response set EPDCCH provides a method of receiving a random access response related to the random access preamble. Furthermore, the search space of a PRB or a VRB is, the DL system band width total PRB number, slot number, and the number and the RA-RNTI of the PRB for the random access response message formats that make up the set by the random access response message formats It provides a process that is determined by the function. Furthermore, RA-RNTI value of the random access response is directed to a method that is determined by one or more of the number of iterations, and the random access response message The format of the random access preamble. In addition, the random access response EPDCCH set configuration information, a method that is received via a cell specific higher layer signaling. In addition, the monitored set is the random access response EPDCCH, the random access response is provided a method is distinguished by setting EPDCCH format.

Another embodiment of the invention, the base station performing the random access procedure, a random access for receiving a preamble based on receiving a random access response message formats for configuring a random access response related to the random access preamble or random access response EPDCCH It provides a base station apparatus comprising a transmission section for transmitting a control unit and a random access response configuring the set. In the case based on the random access response message format which the random access response configuration, the transmitter provides a base station apparatus for transmitting through a search space is set to the random access response by the random access response message format. Furthermore, the search space of a PRB or a VRB is, the DL system band width total PRB number, slot number, and the number and the RA-RNTI of the PRB for the random access response message formats that make up the set by the random access response message formats It provides a base station device determined by the function. In the case to which the random access response configuring the basis of the random access response message formats, RA-RNTI value of the random access response is determined by one or more of the number of iterations, and the random access response message The format of the random access preamble which provides a base station apparatus. Further, when configuring the random access response EPDCCH set, the transmitter provides a base station apparatus that transmits the random access response through the random access response EPDCCH set. Further, when configuring the random access response EPDCCH set, the transmitter provides a base station apparatus further transmits the random access response EPDCCH set of configuration information. In addition, the random access response EPDCCH set configuration information and provides the base station apparatus to transmit through the cell specific higher layer signaling.

In still another embodiment of the present invention, random in the access procedure, the terminal to perform, monitor the at least one search space, which is set by each transmitting apparatus and the random access response message format for transmitting a random access preamble or random access response EPDCH set configuration information Therefore, on the basis of the control and monitoring of the result of monitoring the random access response set EPDCCH provides a terminal device including a receiving unit receiving a random access response related to the random access preamble. Furthermore, the search space of a PRB or a VRB is, the DL system band, the number of the total PRB constituting the width, slot number, and the number and the RA-RNTI in the PRB for each random access response message format which is set by the random access response message formats and it provides the terminal apparatus determined by the function. Furthermore, RA-RNTI value of the random access response, there is provided a terminal apparatus which is determined by the number of iterations, and one or more of the random access response message The format of the random access preamble. Further, the reception unit, provides a terminal device further receives through the cell specific higher layer signaling to the random access response EPDCCH set of configuration information. In addition, the monitored set is the random access response EPDCCH, the random access response and provides the terminal apparatus is set distinguished by EPDCCH format.

According to the invention as described above, when transmitting a random access response for the MTC terminal repeatedly in a plurality of sub-frames may provide a way to determine the resources to allocate random access response.

The present invention also provides the effect of reducing the excessive load due to the repeated transmission in case of transmitting a random access response for a coverage limited UE MTC.

The present invention also provides in the case of transmitting the random access response via the PDSCH resource fixing effect to provide a proper amount of radio resources according to the size of the random access response.

1 is a diagram showing the initial cell access procedure of the UE.

2 is a view illustrating a random access process in FIG.

Figure 3 is a general case of a terminal is a chart showing the process in which the random access preamble and a random access response transmitted.

Figure 4 is the case of the terminal MTC is a chart showing the process in which is repeated a random access preamble and a random access response transmitted.

5 is a flow chart showing a method of setting the RAR transmitted sub-frame according to one embodiment.

6 is a view showing an example in which the starting sub-frame of the RAR sub-frame transmission set in the FDD system.

7 is a view showing an example in which the starting sub-frame of the RAR transmission subframe set in a TDD system.

8 is a view showing another example in which the starting sub-frame of the RAR transmission subframe set in a TDD system.

9 is a view showing an example in which the starting sub-frame of the RAR sub-frame transmission selected from a plurality of candidates.

10 is a flow chart showing a method of setting the RAR transmission resource according to one embodiment.

11 is a view showing an example of a resource block allocated for transmission RAR.

12 is a view showing another example of the resource blocks allocated for the transmission RAR.

13 is a flow chart illustrating how to set the RAR transmission resources according to another embodiment.

14 is a block diagram showing the configuration of a terminal according to one embodiment of the invention.

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

16 is a view showing a repeated transmission and reception operations of the present invention expand the coverage of the random access preamble and a random access response from the MTC terminal of illustratively.

17 is a signal diagram illustrating the operation of the terminal and the base station according to an embodiment of the present invention.

Figure 18 is a flow chart showing operation of the base station according to another embodiment of the present invention.

19 is a diagram illustratively showing a random access response message formats of the present invention.

Figure 20 is a flow chart showing the operation of a terminal according to another embodiment of the present invention.

21 is a signal diagram illustrating the operation of the terminal and the base station according to an embodiment of the present invention.

Figure 22 is a flow chart showing operation of the base station according to an embodiment of the present invention.

Figure 23 is a flow chart showing operation of the base station according to an embodiment of the present invention.

24 is a diagram showing an example of information elements that may be included in the EPDCCH configuration information.

Figure 25 is a flow chart showing the operation of a terminal according to another embodiment of the present invention.

26 is a view showing the number of EREGs per ECCE illustratively.

27 is a diagram illustrating a format EPDCCH by way of example.

28 is a block diagram showing the configuration of a base station according to an embodiment of the present invention.

29 is a block diagram showing the configuration of a terminal according to another embodiment of the present invention.

It will be described in detail below through illustrative drawings of some embodiments of the invention. In addition as the reference numerals in the respective drawings of the component, as to the same elements even though shown in different drawings It should be noted that and to have the same reference numerals as much as possible. Further, in the following description of the present invention, a detailed description of known functions and configurations that are determined to obscure the gist of the present invention, the detailed description thereof will be omitted.

MTC terminal herein, can refer to a terminal, such as terminals that support or coverage enhancement to support the low cost (or low complexity). MTC terminal herein, can refer to a terminal, such as to support the low cost (or low complexity) and coverage enhancement. Or MTC terminal herein, can refer to the terminal defined in a particular category to support a low cost (or low complexity) and / or coverage enhancement.

In other words, the terminal MTC herein may refer to newly defined 3GPP Release-13 low cost (or low complexity) for performing MTC operations of the related LTE-based UE category / type. Or MTC terminal in this specification is supported, or defined in the existing than 3GPP Release-12 to support low power consumption, UE category / type, or a newly defined Release-13 low cost (or the existing LTE coverage contrast enhanced coverage low complexity) can mean a UE category / type.

The wireless communication system according to the present invention can be widely deployed to provide various communication services such as voice, packet data, and so on. The wireless communication system includes a user terminal (User Equipment, UE) and a base station (Base Station, BS, or eNB). The user terminal as a comprehensive concept that refers to a terminal in a wireless communication, WCDMA and LTE, UE (User Equipment), as well as, MS (Mobile Station), (User Terminal) UT in the GSM, etc. HSPA herein, SS (Subscriber Station), to be construed as a concept including all of the wireless device (wireless device).

A base station or a cell (cell) generally refers to a user terminal and a point (station) for communicating, node -B (Node-B), eNB (evolved Node-B), a sector (Sector), site (Site), BTS ( Base Transceiver System), AP (access point), a relay node (relay node), Remote Radio Head (RRH), RU (Radio Unit), and may be referred to as another terminology, such as small cell.

That is, a partial region or the ability to herein include a base station or a cell (cell) is a eNB or a sector at the BSC (Base Station Controller), a WCDMA Node-B, LTE / LTE-Advanced in CDMA (site) covered in shown to be interpreted as a comprehensive sense, the mega cells, is meant to macro cells, micro cells, all of the various coverage areas, such as picocell, femtocell, and the relay nodes (relay node), RRH, RU, small cell communication range encompassing.

Various cells listed above is present for controlling the base station of each cell, so the base station can be interpreted in two senses. i) in connection with a wireless area mega cell, macro cell, micro cell, pico cell, a femtocell, or a device that provides small cells themselves, ii) can indicate the wireless region itself. i) is in all of all of the devices that interact to control by the apparatus, the same object to provide a predetermined radio area, or configuration of the wireless area indicated by the collaborative base stations. Depending on how the wireless area eNB, RRH, antenna, RU, LPN, point, transmission point, transmission point, the reception point and the like are an example of one embodiment of a base station. ii) radio that receives a signal from the perspective of a base station or a neighboring point of view of the user terminal or the transmission region in may indicate that the base station itself.

Thus, it referred to as a mega cell, macro cell, micro cell, pico cell, a femtocell, small cell, RRH, antenna, RU, LPN (Low Power Node), collectively referred to as a point, eNB, transmission point, transmission point, the reception point base station do.

The user terminal and the base station in the present specification is used in two transmitting and receiving entities used to implement the technical spirit or described herein in a comprehensive sense is not limited by the terms, or words that are specifically referred to. The user terminal and the base station, is used in two (Uplink or Downlink) comprehensive means to transmitting and receiving entities used to implement the technical spirit or described herein are not limited by the terms, or words that are specifically referred to. Here, the UL (Uplink, UL, or uplink) refers to the method for transmitting and receiving data to the base station by the user terminal, and downlink (Downlink, DL, or downlink) transmit and receive data to the user terminal by the base station It means the way.

Multiple access techniques applied to the wireless communication system is not limited. CDMA (Code Division Multiple Access), TDMA (Time Division Multiple Access), FDMA (Frequency Division Multiple Access), OFDMA (Orthogonal Frequency Division Multiple Access), OFDM-FDMA, OFDM-TDMA, a variety of multiple access techniques such as OFDM-CDMA the can be used. One embodiment of the present invention can be applied to resource allocation, such as a synchronous wireless communications that have evolved in an asynchronous wireless communication and, CDMA, CDMA-2000 and UMB evolving in LTE and LTE-Advanced via a GSM, WCDMA, HSPA. The invention is should not be construed as limited or restricted to a specific field of wireless communications, it is to be construed as including all the art that the inventive idea can be applied.

UL transmission and DL transmission may each be a TDD (Time Division Duplex) method is used to be transmitted by using a different time, or there is (Frequency Division Duplex) FDD scheme can be transmitted using a different frequency.

Further, in the system, such as the LTE / LTE-Advanced by configuring the uplink and downlink based on a single carrier or a carrier wave pair constitutes the standard. As uplink and downlink is, PDCCH (Physical Downlink Control CHannel), PCFICH (Physical Control Format Indicator CHannel), PHICH (Physical Hybrid ARQ Indicator CHannel), PUCCH (Physical Uplink Control CHannel), EPDCCH (Enhanced Physical Downlink Control CHannel) transmitting control information through the same control channel and is composed of a data channel such as a PDSCH (Physical Downlink Shared cHannel), PUSCH (Physical Uplink Shared cHannel) and transmits the data.

On the other hand it may also transmit control information by using the EPDCCH (PDCCH enhanced or extended PDCCH).

Cells (cell) is a component carrier (component carrier) with the coverage of signals transmitted from a coverage or transmission and reception point (transmission point or the transmission / reception point) of the signal transmitted from the transmission point in this specification, mean the transmitting and receiving point itself can.

Examples of wireless communication systems transmit and receive more than one point to cooperate with cooperative multi-point transmission and reception system for transmitting a signal that is applied (coordinated multi-point transmission / reception System; CoMP system) or cooperative multi-antenna transmission method (coordinated multi- antenna transmission system), can be a cooperative multi-cell communication system. CoMP system can include at least two multi-point transmission and reception with the terminal.

Multiple transmission points, at least one having a low transmission power in the base station or the macro cell (macro cell, hereinafter 'eNB' & quot;) and, connected by a fiber optic cable or optical fiber to the eNB, the higher the transmission power, which is wired control or macro cell area there's also one RRH.

DL (downlink) below refers to the communication or the communication path to the mobile station in a multi-point transmission and reception, and, the UL (uplink) refers to the communication or a communication path to the multi-point transmission and reception at the terminal. In downlink, a transmitter may be a part of the multi-point transmission, the receiver may be a part of the terminal. In uplink, a transmitter may be a part of the UE, the receiver may be a part of the multi-point transmission and reception.

In the following the situation in which a signal is transmitted and received over a channel, such as PUCCH, PUSCH, PDCCH, PDSCH, and EPDCCH 'transmits, receives the PUCCH, PUSCH, PDCCH, PDSCH, and EPDCCH' are also written in the form.

In addition, the following description that send or receive PDCCH or transmit or receive a signal through the PDCCH may be used as a means, comprising transmitting or receiving EPDCCH or transmit or receive a signal through the EPDCCH.

In other words, the physical downlink control channel described below may refer to a PDCCH or EPDCCH means, is used as a meaning that includes both PDCCH and EPDCCH.

In addition, in part explained by PDCCH for convenience of explanation and can be applied to an embodiment EPDCCH of the present invention, in part explained by EPDCCH can be applied EPDCCH to one embodiment of the present invention.

On the other hand, the upper layer signaling that described below in (High Layer Signaling) comprises an RRC signaling to transmit an RRC information including the RRC parameters.

eNB performs downlink transmission to the terminals. eNB is unicast transmission (unicast transmission) a primary physical channel a physical downlink shared channel (Physical Downlink Shared Channel, PDSCH), and the downlink control information and the uplink data channel (such as the scheduling and so on necessary for reception of the PDSCH for example may transmit the physical uplink shared channel (physical uplink shared channel, PUSCH)) physical downlink control channel (physical downlink control channel, PDCCH) for transmitting the scheduling grant information for transmission in. In the following description, that the signal is transmitted and received through each channel it will be described in the form as the channel is transmitted and received.

1 is a diagram showing the initial cell access procedure of the UE.

From the cells of the connection process 1, the terminal receives the terminal 10 base station 20 is a (Primary Synchronization Signal) PSS synchronization signal for transmitting and SSS (Secondary Synchronization Signal) (S102). In LTE FDD (Frequency Division Duplex) PSS may be transmitted on one radio frame (radio frame, for example, 10ms) subframe # 0 and the first last symbol (#n) in the second slot of the subframe # 5 in, SSS may be sent in # 0 and the previous symbol (# n-1) of the last symbol (#n) of the first slot of a sub-frame # 5. PSS / SSS in LTE TDD can be transmitted in a different location from the FDD. Terminal 10, the PSS and upon detection of the SSS cell ID and the downlink may obtain synchronization information, PSS / SSS based on the obtained information based on the specified in the cell reference signal (Cell-specific Reference Signal, CRS ) and it can perform additional synchronization and control channel decoding using a existing.

Terminal 10 extracts the received signals over the PBCH based on CRS from the base station (20) and (S104), a MIB (Master Information Block) transmitted on the PBCH (S106). MIB may include information indicative of the information, and a system frame number which indicates the information, the PHICH configuration indicative of a bandwidth of a cell. Terminal 10 on the basis of the information contained in the MIB is possible to know which PDCCH resources are allocated.

The terminal 10 receives the signal through the PDCCH based on a CRS from the base station 20 and extracts (S108), the downlink control information (Downlink Control Information, DCI) transmitted through the PDCCH (S110). DCI may be a control information on the PDSCH to be transmitted is (System Information Block) SIB, can be transmitted over a common search space (common search space).

Terminal 10 is based on the DCI receive signals via the PDSCH based on the DM-RS (Demodulation Reference) from the base station, and extracts a SIB transmitted over a (S112), PDSCH (S114).

Since the subscriber station 10 and base station 20 in may be a random access procedure (random access procedure), and (S116) performs the terminal 10 includes a RRC connection (connected) in a state in RRC idle (idle) state .

2 is a view in detail illustrating the step S116 for performing a random access procedure of Fig.

According to the random access procedure (random access procedure) defined in the conventional LTE or LTE-Advanced system, any LTE or random access preamble of the LTE-Advanced terminal (random access preamble) the random access response to the transmission (Random Access Response, RAR) a method dynamic scheduling (dynamic scheduling) can be applied to the message transfer.

2, the base station 20 transmits a set PRACH (PRACH configuration) information to the terminal (10) (S202). PRACH configuration information can be included in SIB2. PRACH configuration information may include a parameter preambleInitialReceivedTargetPower powerRampingStep and used in determining the transmit power of the PRACH. Detailed description of the parameter and preambleInitialReceivedTargetPower powerRampingStep will be described later.

Terminal 10 determines a transmission power of PRACH, and transmitted to the base station 20, a random access preamble (random access preamble) through the PRACH (S204). The random access preamble may perform functions that enable to estimate the delay between the states that the random access attempts to the base station 20, base station 20 a station 10 and the base station 20. The random access preamble may be transmitted via the PRACH.

Random access preamble the base station 20 receives a transmits the scheduling information for the random access response (random access response, RAR) via the PDCCH or EPDCCH to the terminal (10) (S206). In this case, the random access response can be scheduled onto a DL-SCH (Downlink Shared Channel) designated by the PDCCH or EPDCCH. Downlink control information including the scheduling information for the RAR (downlink control information, DCI) is scrambled with the RA-RNTI it may be transmitted on a PDCCH or EPDCCH common search space (common search space, CSS).

The base station 20 receives a RAR to the UE 10 transmitting and receiving the scheduling information for the RAR RAR via the PDSCH to the mobile station 10 is using them (S208).

Hereinafter, it is to mean that transmits a random access response which the base station information is transmitted, can be used as a random access response message transmission and transmitting the random access response as defined.

More specifically described again in the random access procedure as follows.

A random access response for the random access preamble transmission of the terminal is transmitted on a downlink data channel, i.e. PDSCH. For example, the random access response, the scheduling information for consist of DCI format 1A or DCI format 1C RA-RNTI (Random Access RNTI) is CRC (Cyclic Redundancy Check) scrambling (scrambling) by a control region (control region) of it was transmitted over the PDCCH transmitted on a (Common Search Space) CSS. That is, the UE had to be preceded by a decode (decoding) for the PDCCH containing the scheduling information for the random access response from the first CSS to receive the response message of the random access response for the random access preamble transmission. In any base station it was possible to freely scheduled for the random access response within a random access preamble and then receives a constant time period (time window).

Figure 3 is a general case of a terminal is a chart showing the process in which the random access preamble and a random access response transmitted.

3, the terminal 10 transmits the random access preamble via the PRACH in the uplink subframe #n. A base station 20 receiving a random access preamble and transmits the RAR through PDSCH in the downlink subframe # (n + k). At this time, the terminal 10 includes a single uplink subframe sending a random access preamble from (subframe #n), and the base station 20 is one of a downlink subframe (subframe # (n + k)) RAR to be transmitted. If MS 10 fails to transmit the random access preamble (or, if the terminal 10 fails to receive the RAR), the terminal 10 transmits the random access preamble via the PRACH in the next PRACH transmission subframe.

[Of LTE-based, low-cost MTC]

The LTE network is spread, mobile operators may want to minimize the number of RAT (Radio Access Terminals) such as to reduce the maintenance cost of the network. However, increasing the conventional GSM / GPRS-based network of MTC and products, and it is possible to provide at low cost the MTC to use a lower data rate. Therefore, in order to use the LTE network to a general data transmission in a mobile communication operator position and MTC GSM / uses the GPRS network, the two arises a problem that must each operate a single RAT, which mobile operators to inefficient use of the frequency band this is a burden on earnings.

To solve this problem, GSM / EGPRS and the need to replace the cheap MTC terminal used by the network to the MTC terminal to use the LTE network, the various requirements are 3GPP RAN WG1 standard meeting to lower the price of the LTE MTC terminal to it it is being discussed in. In addition, it performs the standard meeting the creation of a document describing the various functions that can be provided to meet the above requirements.

The cost to change the physical layer standard under discussion in current 3GPP LTE MTC to support the terminal-related major item may include technologies such as narrow band support / Single RF chain / Half duplex FDD / Long DRX (Discontinued Reception) as an example. However, the method under consideration in order to lower the price can reduce the performance of the MTC terminal as compared with the conventional LTE terminal.

In addition, the smart metering 'Deep indoor' are installed in the environment, for a successful MTC data transmission, the coverage of LTE MTC terminal is a conventional general LTE terminal, such as MTC terminal of the 20% of the basement supporting the MTC services, such as (Smart metering) compared to the coverage to be improved by approximately 20dB. Also, if further consideration of the performance reduction due to the change of the standard coverage LTE terminal MTC is to be improved by more than 20dB.

Thus, a boost (Robust), such as LTE lowering MTC terminal price PSD in order to improve the coverage (power spectral density) boosting (boosting) or low coding rate (Low coding rate) and the time domain repeats (Time domain repetition) a various methods for the transmission has been considered for each physical channel.

The requirements of LTE-based low-cost MTC terminal is as follows.

- data transmission rate has to meet the data transmission speed, that is, downlink 118.4kbps, 59.2kbps uplink provided by the minimum EGPRS (enhanced GPRS) based on the MTC terminal.

- frequency efficiency should be dramatically improved compared to GSM / EGPRS MTC terminal.

- a service area that is provided is not less than that provided by the GSM / EGPRS MTC terminal.

- power consumption is also not larger than the GSM / EGPRS MTC terminal.

- general LTE terminal and LTE MTC terminal should be able to use the same frequency.

- reuse the existing LTE / SAE network.

- and in the optimization FDD mode, TDD mode as well.

- cost LTE MTC terminal shall support the limited mobility (mobility) and low power consumption module.

In the present invention, it will be typical LTE / LTE-Advanced than the terminal away from the radio channel transmission performance, improved coverage (coverage improvement) coverage limit the low-end terminal MTC is required (limited coverage) referred to as the MTC terminal.

To support an extended coverage for a coverage limited MTC terminal, a base station transmits repeatedly over a single downlink subframe made spilling PDCCH or EPDCCH and the PDSCH transmit a plurality of downlink subframes to, the MTC terminal also it is necessary to combine the PDCCH or PDSCH EPDCCH and (combining) received on the plurality of DL subframes to perform the decoding (decoding).

Accordingly, the PDCCH is also repeated (repetition) through a plurality of DL sub-frame as well as a random access response for the random MTC terminal to perform a random access procedure, including the scheduling information for the random access response is made is transmitted. This may cause an excessive load (overhead) for the PDCCH CSS.

The present invention proposes for the PDSCH resource allocation scheme for the RAR message transmitted for the MTC terminal. In particular, a standard for, RAR transfer rather than a dynamic scheduling through the PDCCH - proposes for the static (semi-static) resource allocation scheme PDSCH.

The invention proposes for the PDSCH resource allocation scheme for the RAR sent for MTC terminal. More specifically, so as to be proposed for the RAR sent downlink sub-frame allocation, and therefore RAR repetition number determination method and PRB (Physical Resource Block) allocation for the RAR sent in each downlink subframe according.

In order to improve the coverage limits the random access preamble reception performance of the MTC terminal at any LTE / LTE-Advanced base station, the newly defined, or repeatedly transmitted (repetition) a conventional random access preamble format, a random access preamble format for the MTC terminal the measures that can be taken into account.

, For example, coverage limited case of the MTC terminal, existing regular LTE / LTE-A to the a generated preamble is based on the random access preamble format for terminal repeating M times, M uplink subframes, as shown in FIG. 4 (UL the scheme for transmitting the subframe # (n-M + 1) to UL subframe #n) may be considered. At this time, the base station may transmit at a coverage limited to MTC terminal repeat RAR L times to the L downlink subframe (DL subframe # (n + k) to DL subframe # (n + k + L-1)) .

As another example, in the case of the coverage limit MTC terminal, which is defined across the M uplink subframes, that is, the sum of the CP length and the sequence length of the length (a preamble format of a preamble format, that is T CP + T SEQ value, or sequence length, there is a scheme for transmitting a preamble generated based on a new random access preamble format, increased the length of the T SEQ) it may be considered.

In addition, the coverage limits of the existing dynamic scheduling for the RAR message transmission resource allocated for the terminal MTC (dynamic scheduling) method, at a base station who is not - there is a static scheduling (semi-static scheduling) method of application being considered.

Thus, criteria for the appropriate RAR - a specifically defined on how to allocate the PRB for the RAR sent from one or more RAR the DL subframe and the downlink subframe comprises a transmission is required for the static scheduling application.

In the present invention, to propose a scheme for determining the RAR repetition time related to the DL sub-frame allocation scheme and that for RAR and resource blocks (Resource Block (s)) allocated room in the DL subframe.

Start downlink subframe and the number of repeats for RAR]

5 is a flow chart showing a method of setting the RAR transmitted sub-frame according to one embodiment.

5, the base station 20 transmits the sub-frame information indicative of the relationship between the terminal 10, the random access preamble is transmitted being sub-frame and the random access response is transmitted in that sub-frame (S510). And receiving a random access response for the random access preamble terminal 10 through a downlink sub-frame determined based on the sub-frame information from the base station 20 by transmitting a random access preamble (S520), the base station 20 ( S530).

In one example, the subframe information may be information indicative of the sub-frame difference between a DL subframe to be transmitted is the start of a random access response from the uplink sub-frame transmission has ended in the random access preamble. That is, when the transmission of the random access preamble on the uplink subframe #n ends, can be set to be the transmission of the DL subframe # random access response on the (n + k) starts, the subframe information k It may include a value. k value corresponding to can be limited to any positive integer.

, For one example, the value in the case of FDD systems k may be four days. 6 is a view showing an example in which the starting sub-frame of the RAR sub-frame transmission set in the FDD system. 6, the repeat the random access preamble transmission is completed uplink subframe (subframe #n) from the four sub-frames after the downlink subframe in the random access response (a subframe # (n + 4)) that the the transmission can be started.

Another example, the value in the case of the TDD system, k may be a value set based on a sub-frame number of the uplink subframes to be transmitted ends of the random access preamble UL-DL set (UL-DL configuration) and repeat. 7 is a view showing an example in which the starting sub-frame of the RAR transmission subframe set in a TDD system. In the example of FIG. 7, UL-DL is set 1 and the sub-frame number of the uplink subframes transmitted the end of the random access preamble is repeated 3. In Figure 7, in such a case, the value of k may be determined as 6, the transmission of the repeat the random access response can be started from the sub-frame 9.

In step S510 the sub-frame information including information indicative of a value of k higher layer signaling (e.g., RRC) may be transmitted from the base station 20 via a terminal 10. Alternatively, the value of k may be a value set in advance between the base station 20 and terminal 10.

On the other hand, the subframe information may be information indicating the index of the starting subframe of the RAR sub-frame transmission. For the TDD system, DL-UL set and to repeat the transmission of the random access preamble based on a sub-frame number (#n) in an uplink subframe that is the end index of the starting subframe of the RAR sub-frame transmission (#p) is It can be determined. 8 is a view showing another example in which the starting sub-frame of the RAR transmission subframe set in a TDD system. In the Figure 8 example, the random access preamble when the repeated uplink subframe (subframe #n) to be transmitted is completed, the index of a DL subframe to be transmitted is the start of the random access response can be determined by #p . At this time, when the radio frame to be transmitted is completed in a repeated random access preamble #M, a radio frame transmission is the start of the repeat the random access response may be in the next radio frame # (M + 1). That is, when the transmission of the repeat the random access preamble to terminate in the radio frame #M, the sub-frame #n, the transmission of repeat the random access response may be started from the radio frame # (M + 1), subframe #p. At this time, the value of the #p may be set to different values ​​set to the same value regardless of UL-DL set or by UL-DL configuration. On the other hand, the transmission of the repeat the random access response may be initiated in the radio frame # (M + N) (N is a positive integer). An example of this embodiment in the above been described with reference to a TDD system, it is also possible to be applied to an FDD system.

The sub-frame information from the S510 step includes information indicating the value of the value and / or N of the p higher layer signaling (e.g., RRC) may be transmitted from the base station 20 via a terminal 10. Alternatively, the value and / or the value of N may be a value of p is set beforehand between the base station 20 and terminal 10.

On the other hand, the value of the value or of the above-described p k may have a plurality of values ​​within a range, rather than having a single value.

For example, the value of k may have the value of all positive integers satisfying k1≤k≤k2. When the terminal 10 ends the transmission of the random access preamble repeated in the uplink subframe #n, in the terminal 10 the DL subframe # (n + k1) to the subframe # (n + k2) from one of the sub-frame it is included it can be expected that the RAR transfer is started. That is, from the case of the FDD, the UE 10 is k2-k1 + from one of the first number of sub-frames can be expected that the RAR transfer is started, in the case of TDD, one of the k2-k1 + 1 sub-frames of no more than it can be expected that the RAR transfer begins. Terminal 10 may perform the detection on the candidate RAR each individual RAR transmission start subframe.

9 is a view showing an example in which the starting sub-frame of the RAR sub-frame transmission selected from a plurality of candidates. In the example of Figure 9, k ranges from 4≤k≤6. Terminal 10 is the subframe # (n + 4) attempting to RAR detected in the L sub-frame from, and the subframe # (n + 5) from attempting to RAR detected in the L subframes, and the subframe # (n +6) it can be tried from the RAR detected in the L sub-frame.

Receiving the sub-frame information including information indicating the k, p, and / or N from a base station 20, terminal 10, through the upper layer signaling in the above-described embodiment, the RAR sent subframes semi- to be scheduled statically been described. However, in another embodiment, k, p, and / or N can have a value promised in advance from the subscriber station 10 and base station 20.

On the other hand, the number of times the L value of the random access response to be repeated may be defined as a function of the M value or the random access preamble format the number of iterations of the random access preamble format. , For example, the number of times the L value of the random access response to be repeated can be set to be proportional to the value of M number of iterations of the random access preamble format. In another example, the number of times the L value of the random access response to be repeated can be set to be proportional to the length (that is, the value of T CP + T SEQ preamble format) of the random access preamble format.

The MTC can be transmitted to terminals in the cell over a certain RRC signaling - or, the base station 20 is the random access response is set to the number of iterations in L value, and the cell is set to the L value. That is, the base station 20 is to be broadcast to the terminals in the MTC cell comprises a L value in the system information for the MTC terminal.

[Resource block allocation for RAR]

10 is a flow chart showing a method of setting the RAR transmission resource according to one embodiment.

10, the terminal 10 determines a random access physical resource blocks to which the response is assigned (Physical Resource Block, PRB) (S1010). The terminal 10 receives a random access response for the random access preamble via the PRB determined by sending a random access preamble (S1020), step S1010 to the base station (20) (S1030).

In one example, PRB for RAR transmitted may be allocated to local-type (localized) manner.

11 is a view showing an example of a resource block allocated for transmission RAR. 11, the number of the PRB allocated for the RAR sent in one downlink sub-frame (R PRB) and the position of the corresponding PRB (frequency location, or PRB index) may be a fixed value. In one example, the value of R PRB may be a natural number of not more than 6, the position of the PRB may be the center frequency of the system band.

12 is a view showing another example of the resource blocks allocated for the transmission RAR. Referring to Figure 12, the number of the PRB allocated for the RAR sent (R PRB) are located in fixed, but the allocation for the RAR sent to each DL subframe PRB may be a frequency hopping (hopping). If the frequency hopping applied to the RAR sent, each of the downlink position of the PRB allocated for the RAR sent from the sub-frame is the bandwidth of the system (number of PRBs, N PRB) and the sub-frame index or a slot number at the time of RAR transmission of it can be determined as a function.

In an example of FIG. 10, PRB allocated for transmission RAR was determined according to the rules set in advance or a value set in advance. However, in other embodiments, the PRB allocated for the RAR transmission is set in the base station 20, a cell may be broadcast to the terminals in the MTC cell through specific RRC signaling.

13 is a flow chart illustrating how to set the RAR transmission resources according to another embodiment.

13, the terminal 10 receives the information for the random access response is allocated physical resource blocks (Physical Resource Block, PRB) from a base station (20) (S1310). The terminal 10 receives a random access response for the random access preamble via the PRB determined by sending a random access preamble (S1320), step S1310 to the base station (20) (S1330).

In this case, PRB allocation information for the RAR can be set to a bitmap method for the PRB that make the overall system bandwidth by reusing the PRB allocated signaling format for the existing set EPDCCH set. In such cases, the PRB allocation may be allocated locally (localized) or distributed (distributed) system.

Or, PRB information cells, when assigned by a specific RRC signaling, the number of the PRB allocated for the RAR sent (R PRB) of the value and the first RAR transmitted together with the R PRB allocation information in the formed downlink subframe , a value of the hop size (H PRB) of the RAR can be signaled.

14 is a block diagram showing the configuration of a terminal according to one embodiment of the invention.

Referring to Figure 14, the terminal 1400 includes a controller 1410, a transmitter 1420 and a receiver 1430.

Control unit 1410 is allocated PDSCH resources for the RAR message transmitted for MTC terminal necessary to perform the above-described embodiment method, not the dynamic scheduling (dynamic scheduling) through the PDCCH, given for RAR transmission-static ( semi-static) to control the operation of a terminal according to allocate a PDSCH resources.

Transmitter 1420 transmits uplink control information to the base station, data, and messages over the channel.

Receiver 1430 receives the downlink control information, data, and messages from the base station through the corresponding channel.

In one embodiment, it can be a subframe in which the random access response transmitted set.

Receiving unit 1430, before transmitting a random access preamble, the sub-frame information indicating a relationship between a subframe that the mobile station receiving a random access response related to the sub-frame and a terminal random access preamble, transmitting the random access preamble It can be received.

Transmitter 1420 can receive a random access response related to a random access preamble transmission of random access preamble and receiving unit 1430 through the subframe determined on the basis of the sub-frame information.

The subframe information may include information that the mobile station UE and a subframe for transmitting a random access preamble indicates a difference between the sub-frame for receiving a random access response.

Alternatively, the subframe information may include information indicating the index of a subframe that the mobile station receiving a random access response.

Alternatively, the subframe information may include terminal information, and information of a subframe of a radio frame for receiving a random access response.

At this time, the subframe information may include a plurality of candidate values, a receiver 1430 may attempt to receive the random access response using the respective candidate values.

It is repeated a random access preamble via the plurality of sub-frames may be received. The number of the plurality of sub-frame may be determined based on at least one of a format of a repetitive transmission number and a random access preamble of the random access preamble. Alternatively, the receiving unit 1430 may receive information indicating the number of the plurality of sub-frames.

In other embodiments, it may be a resource block in which a random access response transmitted set.

Control unit 1410 may determine the resource blocks to which the random access response allocation.

Transmitter 1420 can receive a random access response related to the random access preamble through the resource blocks are determined and transmitted, the receiving unit 1430, a random access preamble.

In one example, the number of resource blocks is provided in advance, the position of the resource block may be determined based on at least one of the indices of the downlink bandwidth, an index of the sub-frame, and the slot.

Alternatively, the receiving unit 1430 may receive information about the resource blocks to be assigned to the random access response.

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

15, the base station 1500 includes a controller 1510, a transmitter 1520 and a receiver 1530.

Control unit 1510 is allocated PDSCH resources for the RAR message transmitted for MTC terminal required for carrying out the present invention the method described above, giving for, RAR transfer rather than a dynamic scheduling (dynamic scheduling) through the PDCCH - static ( semi-static) controls the operation of the overall base station according to the PDSCH allocated to the resource.

Transmitter 1520 and receiver 1530 is used for transmission and reception with the terminal a signal or a message, data necessary for carrying out the invention described above.

In one embodiment, it can be a subframe in which the random access response transmitted set.

Transmitting section 1520 is, prior to receiving a random access preamble, the sub-frame information indicating a relationship between a subframe that the mobile station receiving a random access response related to the sub-frame and a terminal random access preamble, transmitting the random access preamble It can be transferred.

Receiving unit 1530 may receive a random access preamble.

After the random access preamble is received, the transmission unit 1520 may transmit a random access response related to the random access preamble in a subframe determined on the basis of the sub-frame information.

The subframe information may include information that the mobile station UE and a subframe for transmitting a random access preamble indicates a difference between the sub-frame for receiving a random access response.

Alternatively, the subframe information may include information indicating the index of a subframe that the mobile station receiving a random access response.

Alternatively, the subframe information may include terminal information, and information of a subframe of a radio frame for receiving a random access response.

At this time, the subframe information may include a plurality of candidate values.

Is repeated a random access preamble via the plurality of sub-frames may be transmitted. Transmitter 1520 may transmit the information indicating the number of the plurality of sub-frames.

On the other hand, the terminal and base station according to an embodiment of the present invention may perform a random access method that is described below. Embodiments of the invention described in the embodiments below of the present invention described above may be performed in each can be performed separately, or in combination.

PDCCH search space set in for the LTE terminal

Existing 3GPP LTE / For the LTE-Advanced system, a terminal configured to receive the DCI through the PDCCH in, set (set of PDCCH candidates (candidate) defined to monitor for receiving downlink control information in any of the DL subframe k ) as a search space for the UE (search space),

Figure PCTKR2014009471-appb-I000001
It is configured. In this case, the
Figure PCTKR2014009471-appb-I000002
Aggregation level (aggregation level), L (where to configure,
Figure PCTKR2014009471-appb-I000003
) Any PDCCH candidates (candidate) having the m is determined by the equation (1) below.

Equation 1

Figure PCTKR2014009471-appb-I000004

here

Figure PCTKR2014009471-appb-I000005
If the value has, been set (the cross-carrier scheduling) cross-carrier scheduling,
Figure PCTKR2014009471-appb-I000006
Have. If cross-carrier scheduling is not set,
Figure PCTKR2014009471-appb-I000007
It has a value of. (only,
Figure PCTKR2014009471-appb-I000008
Means a CIF (Carrier Indicator Field) values ​​included in the DCI) Also,
Figure PCTKR2014009471-appb-I000009
It has a value,
Figure PCTKR2014009471-appb-I000010
It is the aggregate represents the number of aggregation levels (aggregation level), the PDCCH candidates (candidates) are defined for the terminal L to the monitoring,
Figure PCTKR2014009471-appb-I000011
Represents the number of (Control Channel Element) CCE constituting the DL subframe (subframe) PDCCH control region (control region) in the k.

In the above equation (1) additional

Figure PCTKR2014009471-appb-I000012
Value is determined by equation (2) below.

Equation (2)

Figure PCTKR2014009471-appb-I000013

Wherein each

Figure PCTKR2014009471-appb-I000014
(
Figure PCTKR2014009471-appb-I000015
Has a value of the slot number).

On the other hand, the random access response for the random access preamble transmission of the terminal as described above is transmitted on a downlink data channel, i.e. PDSCH. For example, the random access response, the scheduling information for consist of DCI format 1A or DCI format 1C RA-RNTI (Random Access RNTI) is CRC (Cyclic Redundancy Check) scrambling (scrambling) by a control region (control region) of it was transmitted over the PDCCH transmitted on a (Common Search Space) CSS. That is, the UE had to be preceded by a decode (decoding) for the PDCCH containing the scheduling information for the random access response from the first CSS to receive the response message of the random access response for the random access preamble transmission. In any base station it was possible to freely scheduled for the random access response within a random access preamble and then receives a constant time period (time window).

Because of this, if the random access response message to the dynamic scheduling (dynamic scheduling) without applying the method, the criteria that define to transmit a random access response via any fixed PDSCH resources of through conventional PDCCH - static scheduling (semi-static scheduling ) this approach is required. However, for the semi-random access response-may result in a static scheduling (semi-static scheduling) When used as a random access response allocation is difficult problem that an appropriate amount PRB (Physical Resource Block) in accordance with the size of the message.

In the present invention In order to solve such problem it is proposed for the PDSCH resource allocation method and apparatus for a random access response message sent to the MTC terminal. In particular, given without transmitting the scheduling information through the PDCCH to resources allocation for a random access response transmitted Dynamic the number of cases where the static scheduling method (semi-static scheduling) applied, PRB be allocated according to the size of the random access response message, It proposes a method and apparatus for adjusting the (dynamic).

In other words, the invention proposes for the PDSCH resource allocation method and apparatus for transmitting a random access response for the MTC terminal. Proposed a method of applying a static (semi-static scheduling) - without transmitting specifically through the PDCCH the PDSCH resource allocation information for random access response message sent, allowing them to secure the arbitrary fixed PDSCH resources of for a random access response do. Further, so as to propose a method and apparatus that can be of the PRB allocated according to the message size of the random access response, or to vary the amount of resources. To this end, the present invention is to propose a first embodiment, blind detection random access response receiving room through the (blind detection) received random access response message based on the method and the EPDCCH in the second embodiment to.

16 is a view showing a repeated transmission and reception operations of the present invention expand the coverage of the random access preamble and a random access response from the MTC terminal of illustratively.

16, in order to improve the coverage limits the random access preamble reception performance of the MTC terminal at the base station, newly defines a random access preamble format for the MTC terminal, or to be considered the methods of transmitting repeatedly a conventional random access preamble can.

For example, when the coverage limit MTC terminal, an existing general LTE / LTE-Advanced terminals a random access preamble format, the generated preamble is based on to be transferred repeatedly M times.

As another example, a coverage limited case of the MTC terminal, which is defined across the M uplink subframes, that is, the sum of the CP length and the sequence length of the length (a preamble format of a preamble format, that is T CP + T SEQ value, or sequence length , may be considered a scheme of transmitting a preamble generated based on a new random access preamble format, it increased the length of the T SEQ).

In addition, the coverage limits of the existing dynamic scheduling for the RAR message transmission resource allocated for the terminal MTC (dynamic scheduling) method, and not in a quasi-base station can be a static scheduling (semi-static scheduling) method of application considered.

Thus, for the random access response quasi-static scheduling (semi-static scheduling) application specifically PRB that is the random access response is transmitted on the random downlink sub-frame transmission is composed of an access response (DL subframe (s)) to the the method of assigning (s) is required.

Terminal of the present invention described below refers to the MTC terminal or coverage limited UE.

The base station according to an embodiment of the present invention, receives the random access preamble from the UE. The base station may be configured, configuring random access response EPDCCH set a random access response related to the random access preamble based on the random access response message format. Then, the base station transmits a random access response to the UE. For example, a random access response which the base station transmission may be sent through the search space is determined according to the random access response message formats, the search space may be formed in the data area. As another example, the random access response which the base station transmission may be sent via a random access response EPDCCH set, EPDCCH set may be formed in the data area.

More specifically, the present invention will be described hereinafter the two embodiments as a method for allocating a variable to the PRB according to the size of the random access response message without the scheduling information transmitted through the PDCCH.

The first embodiment. The random access response received in the blind detection-based (Blind detection based RAR message reception for MTC UEs)

17 is a signal diagram illustrating the operation of the terminal and the base station according to an embodiment of the present invention.

The base station according to an embodiment of the present invention is a method of performing a random access procedure, the method and random on the basis of receiving a random access preamble as a random access response message formats configured for the random access response related to the random access preamble It may include the step of sending the access response.

17, the terminal 10 for a random access attempt and transmits a random access preamble to a base station (20) (S1710).

The base station 20 receives the random access preamble and based on a random access format, it is possible to configure the random access response related to the received random access preamble (S1720).

Then, the base station 20 may transmit a random access response configured in accordance with a particular random access format (S1730). For example, the random access response can be transmitted through a search space which is set by the random access response message format.

In this way, in the first embodiment of the present invention it can transmit a random access response with no random access response through the PDCCH scheduling the data layer. In this case, the UE can receive a random access response by decoding using search spaces for blind decoding method that can be set according to the random access format.

Figure 18 is a flow chart showing operation of the base station according to another embodiment of the present invention.

18, the base station receives a random access preamble transmitted from the terminal (S1810).

For example, the terminal may send the generated preamble based on a new random access preamble format, one repeatedly transmitted a random access preamble certain number of times or above as previously described. The base station may receive a generated based on the new or repeat the random access preamble format preamble.

The base station can configure the random access response related to the random access preamble based on the random access response message format (S1820).

For example, the base station can configure the random access response in response to random access response message formatted according to a different set of random access response message sizes sent. The base station can configure the random access response message through a random access response message format suitable for the format of plural random access response message.

On the other hand, the base station when CRC structure for a random access response message for the terminal MTC, RA-RNTI scrambling (scrambling), or scramble a portion of the MSB or LSB of the RA-RNTI is possible to configure the CRC.

In this case, the random access response of the RA-RNTI value may be determined by one or more of the number of iterations, and the random access response message The format of the random access preamble.

For example, it may be defined by a higher layer (higher layer) to the RA-RNTI in the same manner as conventional, regardless of the random access response message format. That is, it can be defined on the basis of such sub-frame number or slot number relating to the reception of the random access preamble.

As another example, the RA-RNTI may have a different value according to the number of iterations or a random access response message The format of the random access preamble.

Additionally, as a channel coding scheme (channel coding scheme) for the random access response message of the MTC terminal can be equally applied in turbo coding (turbo coding) channel coding scheme (channel coding scheme) for the conventional DL-SCH. Alternatively, the random access response message of the terminal MTC is also possible to apply the existing DCI channel coding method of tail-biting convolutional coding (Tail biting convolutional coding) method.

The base station is a random access response consisting of the above-described method to transfer through the data area (S1830). That is, the random access response can be transmitted through the PDSCH, it can be transmitted without being scheduled by the PDCCH, through the search space that can be set based on the random access response message format.

19 is a diagram illustratively showing a random access response message formats of the present invention.

Referring to Figure 19, in the first embodiment of the present invention may define a plurality of random access response message format for random access response message sent to the MTC terminal.

For example, each of the random access response message format may be to include a number of PRB allocation information different from each other as shown in Figure 19 table. Specifically, the random access response message format 0 may be assigned to the number of PRB N 0, it can be set to a number such as the MCS and the random access response corresponding to the candidate.

However, Figure 19 does not impose a limit on the value of the random access response message as well be a depiction of the format by way of example, the number of a specific random access response message of a format and each of the random access response message to each PRB (number of PRBs) . You may also be using a fixed MCS regardless of the respective random access response message formats, or a different MCS defined by the random access response message format.

The BS may transmit to configure the random access response over a random access response message transmission when a plurality of random access response message format random access response message of the format suitable for the above-defined MTC terminal.

In the following description, in performing a random access procedure according to the first embodiment, it will be described with reference to the drawings the operation of the terminal.

Figure 20 is a flow chart showing the operation of a terminal according to another embodiment of the present invention.

A method for a terminal according to an embodiment of the present invention performs random access procedures, monitoring, or random access response EPDCH set configure at least one search space, which is set for each step as a random access response message format for transmitting a random access preamble on the basis of the information it may comprise receiving a random access response related to the random access preamble according to the step and monitoring the results of monitoring the random access response EPDCCH set.

Referring to Figure 20, the terminal can transmit a random access preamble in order to perform a random access procedure (S2010). UE may transmit a random access preamble over the transmission or sub-frame number is repeated a random access preamble in order to meet the aforementioned requirements MTC terminal.

The UE may monitor at least one search space, which is set by the random access response message format (S2020).

For example, the terminal transmitting the random access preamble may randomly for the terminal in a search space (search space), which is configured in the PDSCH region to each of the random access response message format based on the random access response message candidates (RAR message candidate) blind decoding (blind decoding) on ​​the access response message can be performed.

The UE may receive the random access response for the random access preamble sent by the above described blind decoding (S2030).

UE random access preamble transmitted random access response receiving the random access response transmitted to the terminal expects one or a plurality of downlink subframes to about (DL subframe (s)), each of the random access response message in a PDSCH region of may perform blind decoding (blind decoding) on ​​the search space is defined by the format for receiving a random access response.

For example, the terminal is monitoring each of the random access response message formats are defined to (monitoring) (RAR message format, v) the PRB that make up the search space for (Physical Resource Block) or VRB (Virtual Resource Block) index (or indices ) is the total number of PRBs constituting the downlink system bandwidth (bandwidth, respectively) (total number of PRBs, N PRB), the slot number (slot number,

Figure PCTKR2014009471-appb-I000016
), May be determined as a function such as the random access response message format (the number of PRBs constituting the message format RAR, v) (number of PRBs, N v) and the RA-RNTI. That is, the random access response PRB or a VRB of a search space that is set by the message format, the number of total PRB constituting the DL system band width, slot number, the random access response message format according to another embodiment of the present invention; the number of PRB, and can be determined by the function of the RA-RNTI.

Thus for example, it may be conventional PDCCH search space (search space setting) expression reuse (reuse) described above. In this case, each in the above-described Equation 1 PRB or a VRB index (indices) of the PDSCH region constituting a search space (search space) for any of the random access response message format (format RAR message, v)

Figure PCTKR2014009471-appb-I000017
Instead of applying the N PRB, L instead of N v, and also m '= m = 0, ... It can be defined by applying M (v) -1. However, the case in equation (2) to define the Y k
Figure PCTKR2014009471-appb-I000018
To apply
Figure PCTKR2014009471-appb-I000019
It can be applied to the RA-RNTI to the value.

As it described above, according to the first embodiment of the present invention the subscriber station and the base station can transmit a random access response through a search space that in the base station can be defined by the random access response message format in performing a random access procedure . The MS may monitor the PRB or a VRB according to the PRB or a VRB index of a search space that can be set based on the random access response message formats to receive a random access response.

According to the invention, it is possible to prevent the waste of PDCCH resources according to the repeatedly transmitted. In addition, there is an effect that it is possible to reduce the consumption of radio resources according to the repeated transmission being transmitted through a predetermined data region according to a random access response message format rather than a random access response to be scheduled by the PDCCH.

Embodiment 2: a method of transmitting and receiving a random access response through the EPDCCH.

As in the base station according to an embodiment of the present invention transmits a random access response can be transmitted through the EPDCCH.

21 is a signal diagram illustrating the operation of the terminal and the base station according to an embodiment of the present invention.

The base station according to another embodiment of the invention A method for performing a random access procedure, to sending a phase and a random access response configuring the phase and the random access response EPDCCH set for receiving a random access preamble is.

Referring to Figure 21, the terminal 10 may transmit a random access preamble to a base station (20) (S2110). Terminal 10 may transmit by sending a random access preamble repeat or adjust the length of the random access preamble.

The base station 20 may constitute a random access response EPDCCH set (set) in order to transmit a random access response (S2120). That is, it is possible to configure any of the random access response EPDCCH three (RAR EPDCCH set) for the random access response message sent to the terminal 10 from the base station 20.

The base station 20 may transmit a random access response using the random access EPDCCH set configured (S2130).

Reference to Figure 22 will be described in the specific operation of the base station.

Figure 22 is a flow chart showing operation of the base station according to an embodiment of the present invention.

Referring to Figure 22, the base station may receive the random access preamble from the terminal (S2210). The base station may receive the random access preamble may receive the random access preamble transmitted by the terminal repeats, jeongsong through a plurality of sub-frames.

The base station can configure the random access response EPDCCH set related to the received random access preamble (S2220). For example, the base station can configure any EPDCCH set in the random access response EPDCCH set. The random access response set EPDCCH configured is configured to transmit a random access response. The base station can configure the random access response EPDCCH set on the basis of the configuration information to configure the random access response EPDCCH set.

The BS may transmit a random access response (S2230). For example, the random access response can be transmitted through a random access response EPDCCH configured set.

Figure 23 is a flow chart showing operation of the base station according to an embodiment of the present invention.

There Referring to Figure 23, the base station may further comprise a case, the step of transmitting a random access response EPDCCH set of configuration information to configure the random access response EPDCCH set (S2330). For example, the base station may receive the random access preamble from the UE and the configuration (S2310), random access response EPDCCH set for the received random access preamble (S2320).

The base station can transmit the configuration information used to configure the random access response EPDCCH set to the terminal (S2330).

For example, it is the configuration information to the UE can transmit through the cell specific higher layer signaling. Specifically, it can be sent over the cell-specific RRC signaling (cell-specific RRC signaling).

Alternatively, the base station may be so implicitly (implicit) in the random access response EPDCCH three (RAR EPDCCH set) is configured.

When the cell-specific RRC signaling for a random access response EPDCCH set configuration is applied, the cell-specific RRC signaling LTE / LTE-Advanced conventional EPDCCH set settings for the terminal unnecessary setting of the RRC parameter (parameter) information (one example , it may include only some of the information other than the pucch-ResourceStartOffset-r11, and so on). Alternatively, it is also possible to secure the part set (For example, transmissionType, dmrs-ScramblingSequenceInt, resourceBlockAssignment etc.), to contain only part of the information other than this.

Parameter is included in the configuration information, refer to Fig. 24 to be described in detail.

The BS may transmit a random access response via the configured EPDCCH set (S2340).

24 is a diagram showing an example of information elements that may be included in the EPDCCH configuration information.

The base station can transmit the configuration information used to configure the random access response EPDCCH set to the terminal. The BS may transmit through the cell specific higher layer signaling the configuration information to the UE. Specifically, it can be sent over the cell-specific RRC signaling (cell-specific RRC signaling).

For example, cell-specific RRC signaling may include only some of the information other than the LTE / LTE-Advanced conventional EPDCCH set settings for the terminal unwanted of the RRC parameter (parameter) setting information (an example, such pucch-ResourceStartOffset-r11) can do. Alternatively, it is also possible to secure the part set (For example, transmissionType, dmrs-ScramblingSequenceInt, resourceBlockAssignment etc.), to contain only part of the information other than this.

The EPDCCH set RRC setup parameters as shown in Figure 24 may include an information element (information element) related to the EPDCCH configuration.

The base station random access response method in transmitting the EPDCCH set of configuration information to the terminal, some of the information of the transmission, including some of the information of the information in FIG. 24 or 24 is transmitted including only information fixed, except for the fixed information can.

EPDCCH information elements for the configuration of Figure 24 includes information on the sub-frame and resource block for EPDCCH monitor in which a base station configured for the serving cell.

Each information element of Figure 24 includes information shown in Table 1.

TABLE 1

Figure PCTKR2014009471-appb-I000020

As another example, the base station may configure the random access response EPDCCH set implicitly (implicit). That is, it is also possible to ensure that configuration information for configuring the random access response EPDCCH set to have a fixed value, or determined by the function using the slot number (slot number) and the RA-RNTI.

The operation of the UE according to the second embodiment will be described with reference to Fig.

Figure 25 is a flow chart showing the operation of a terminal according to another embodiment of the present invention.

UE may transmit a random access preamble in order to perform a random access procedure (S2510). Terminal as described above may be configured to transmit a random access preamble via the plurality of sub-frames transmitted, or repeat a random access preamble.

MS can monitor the random access response for the random access response reception EPDCCH set for the random access preamble transmitted (S2520). The UE may receive the configuration information for the random access response EPDCCH set through higher layer signaling from the base station to monitor the random access response EPDCCH set.

The UE may receive the random access response via the random access response set EPDCCH monitoring (S2530).

Terminal is associated with a specific method EPDCCH set monitor for receiving a random access response with reference to Fig. 26 and 27 will now be described by way of example.

The terminal may monitor certain random access response EPDCCH set to a random access response is received. EPDCCH random access response set that the mobile station monitors can be found on the basis of the information given in the above-described configuration information or implicit.

For example, the terminal may monitor the received random access response based on the number of random access response of the random access response EPDCCH EPDCCH candidate format and each of the random access response EPDCCH format.

Figure 26 is a view showing the number of EREGs per ECCE by way of example, Figure 27 is a diagram illustrating a format EPDCCH by way of example.

26 and referring to Figure 27, the number of the random access response, the random access response EPDCCH candidate (RAR EPDCCH candidates) to the random access response transmitted on the EPDCCH set EPDCCH format and should be monitored for each of the random access response EPDCCH format is conventional EPDCCH by the format and the EPDCCH format defined for the LTE / LTE-Advanced terminal can be a terminal the same as the number of EPDCCH candidates that need to be monitored.

For example, Figure 27 shows the number of ECCEs for one EPDCCH set by EPDCCH format. That is, the number of ECCEs for one EPDCCH regardless of localized or Distributed transmission in the case of Case A, if the EPDCCH format 0 may be set to two. In addition, the number of ECCEs for one EPDCCH regardless of localized or Distributed transmission in the case of Case B may be set to one.

On the other hand, Figure 26 is a view showing the number of EREGs per ECCE illustratively. Therefore, the number of EREGs per one ECCE may be determined depending on a cyclic prefix (Cyclic prefix) and the type of the sub-frame as shown in Figure 26. Table.

Thus, the UE can monitor the random access response EPDCCH set on the basis of the EPDCCH EPDCCH format and the number of candidate specific format.

The above has been described the same as the EPDCCH format and the format may each candidate existing LET / LTE-Advanced terminal by way of example, the number of the random access response EPDCCH format and format-specific candidate for the terminal of the present invention may be set separately .

Therefore, in the present invention specifically it does not limit the number of the random access response format EPDCCH (RAR EPDCCH format) and a random access response EPDCCH candidate (RAR EPDCCH candidates).

A random access response as described above, unlike the method for receiving the configuration information for a set EPDCCH perform monitoring, the mobile station may set the random access response set EPDCCH be monitored using an implicit method.

For example, the UE may monitor and acquire the configuration information of the random access response set to monitor EPDCCH implicitly. That is, to perform monitoring on the basis of a preset or a fixed random access response perform monitoring using EPDCCH set configuration information, or by using a slot number (slot number) and the RA-RNTI, such as sending a random access preamble function is.

In the random access procedure of the invention As described above, the terminal and the base station can configure the random access response using the EPDCCH set, and transmitting and receiving a random access response via the configured EPDCCH set.

Through this, and to prevent the waste of radio manor control region due to repeated transmission of a base station random access response, it may be more efficient radio resource utilization.

Additionally, instead of two kinds of random access response receiving method proposed in the present invention is not limited to the random access response repeated for the terminal (RAR repetition) number or random access preamble (random access preamble) timing relationship (timing relation) between the transmission and the RAR reception It can be applied. I.e., it may be applied independent of both the measures defined in the DL subframe for the random access response transmitted.

A configuration of a base station and a terminal that can be carried out all of the present invention described above will be described below by way of example.

Figure 28 is a block diagram showing a configuration of a base station according to an embodiment of the present invention.

Referring to Figure 28, the base station 2800 to perform a random access procedure according to another embodiment of the present invention, the random access preamble based on the receiver 2830 and the random access response message formats for receiving a random access preamble you can form an associated random access response or a transmitter (2820) for transmitting a control unit 2810 and the random access response configuring the random access response EPDCCH set.

If on the basis of the random access response message formats case of the aforementioned first embodiment that a random access response is configured, the transmitter (2820) may transmit through the search space is set to a random access response for each random access response message format.

Control 2800 is a random access response PRB number of the total PRB number, slot number, and the random access response message format in which a PRB or a VRB of a search space that is set for each message format configured for a downlink system bandwidth, and RA-RNTI a it can be determined by the function.

Further, when the random access response message on the basis of the format in which the random access response configuring, RA-RNTI value in the random access response may be determined by one or more of the number of iterations and the random access response message The format of the random access preamble.

On the other hand, the case constituting the second embodiment of the random access response EPDCCH set, the transmitter (2820) may transmit a random access response through a random access response EPDCCH set.

In addition, when constituting a random access response EPDCCH set, the transmitter (2820) may further send a random access response EPDCCH set of configuration information. The random access response EPDCCH set configuration information may be transmitted via a cell specific higher layer signaling. Or implicitly it may be confirmed in the terminal.

In addition, the controller 2810 controls the overall operation of the base station according to PDSCH resource allocation for a random access response transmitted to the MTC terminal required for carrying out the invention described above.

Transmitting (2820) and the receiver 2830 is used for the signal or message, data necessary for carrying out the present invention the above-described transmission and reception with the terminal.

29 is a block diagram showing the configuration of a terminal according to another embodiment of the present invention.

Referring to Figure 29, the MS 2900 to perform a random access procedure according to another embodiment of the present invention, a transmitter for transmitting a random access preamble 2920 and the random access response message formats one or more of the search space, which is set by monitoring or in accordance with the control unit 2910, and monitoring results for monitoring a random access response EPDCCH set based on the random access response EPDCH set of configuration information may include a receiving unit (2930) receiving a random access response related to the random access preamble .

The case of the above-described first a PRB or a VRB of a search space that is set by the random access response message formats, the number of the total PRB constituting the DL system band width, slot number, PRB number of the respective random access response message formats and it may be determined by the function of the RA-RNTI. In addition, the random access response of the RA-RNTI value may be determined by one or more of the random access preamble number and repetition of the random access response message format.

On the other hand, if the receiver of the second embodiment (2930) may further receive through the cell specific higher layer signaling to the random access response EPDCCH set of configuration information.

In addition, the random access response set EPDCCH monitored is, the random access response may be set are distinguished from each EPDCCH format.

In addition, the controller 2910 controls the overall operation of the terminal receiving a random access response transmitted on the PDSCH according to the resource allocation for a random access response transmitted to the MTC terminal required for carrying out the invention described above.

Transmitter 2920 and a receiver (2930) is used to transmit and receive with the base station signals or messages, the data required for carrying out the invention described above.

The above description is only to those described as the technical idea of ​​the present invention by way of example, those skilled in the art that various modifications, additions and substitutions will be possible without departing from the essential characteristics of the present invention. Accordingly, the disclosed invention embodiments is for illustrative and not intended to limit the technical idea of ​​the present invention, not by such an embodiment is the technical scope of the present invention is not limited. The scope of protection of the invention is to be interpreted by the following claims, all spirits within a scope equivalent will be construed as included in the scope of the present invention.

CROSS-REFERENCE TO RELATED APPLICATION

This patent application is October 10, the Patent Application No. 10-2013-0120267 and No. November 01, 2013 a patent application No. 10-2013-0132334 filed in Korea, filed in Korea claim No. 07 2014 and in 2013 07 days filed in Korea Patent Application No. 10-2014-0084249 and No. 08 in 2014, 04 US patents on the Patent Application No. 10-2014-0099563, filed in Korea 119 (a) Article (35 USC § It claims the priority according to the 119 (a)), and that all the contents of which are hereby incorporated in the present patent application by reference. In addition, the present patent application claiming the same priority when two euros above about countries other than the United States that all information is merged into the present patent application by reference.

Claims (20)

  1. As a method that the mobile station receiving a random access response,
    The method comprising the sub-frame and the terminals of the terminal sending a random access preamble receiving a sub-frame information indicative of the relationship between the sub-frame for receiving a random access response related to the random access preamble;
    Transmitting the random access preamble;
    It comprises the step of receiving a random access response related to the random access preamble through the subframe determined on the basis of the sub-frame information.
  2. According to claim 1,
    The sub-frame information, characterized in that it includes information indicating the difference between the sub-frame to sub-frame and the terminals of the terminal transmitting the random access preamble received the random access response.
  3. According to claim 1,
    The sub-frame information, characterized in that it includes information indicating the index of the subframe in which the UE receives the random access response.
  4. As a method that the mobile station receiving a random access response,
    Determining resource blocks to which the random access response is allocated;
    Transmitting a random access preamble; And
    Through the determined resource blocks comprises the step of receiving a random access response related to the random access preamble.
  5. A method in which a base station transmits a random access response,
    Further comprising: the UE transmits the sub-frame information to the sub-frame and the user terminal for transmitting a random access preamble indicates a relationship between the sub-frame for receiving a random access response related to the random access preamble;
    Receiving a random access preamble;
    It comprises the step of sending a random access response related to the random access preamble through the subframe determined on the basis of the sub-frame information.
  6. 6. The method of claim 5,
    The sub-frame information, characterized in that it includes information indicating the difference between the sub-frame to sub-frame and the terminals of the terminal transmitting the random access preamble received the random access response.
  7. 6. The method of claim 5,
    The sub-frame information, characterized in that it includes information indicating the index of the subframe in which the UE receives the random access response.
  8. A method in which a base station transmits a random access response,
    Transmitting information on the resource blocks to which the random access response is allocated to the terminal;
    Receiving a random access preamble;
    It comprises the step of sending a random access response related to the random access preamble via the resource block.
  9. A terminal for receiving a random access response,
    Sending unit for sending a random access preamble; And
    It includes a receiving unit receiving a random access response related to the random access preamble through the subframe determined on the basis of the sub-frame information, and
    The receiving unit, before sending the random access preamble, to the UE indicating the relationship between the sub-frame to the subframe with the terminal for sending the random access preamble received the random access response related to the random access preamble the terminal characterized in that for receiving the sub-frame information.
  10. A terminal for receiving a random access response,
    Control section for determining a resource block in which a random access response is allocated;
    Transmission unit for transmitting a random access preamble; And
    Through the determined resource block terminal including a receiving unit receiving a random access response related to the random access preamble.
  11. A base station transmitting a random access response,
    Receiving unit receiving a random access preamble; And
    And a transmitter for transmitting a random access response related to the random access preamble,
    The transmitter is, prior to receiving the random access preamble, the sub in which the mobile station indicating a relationship between the sub-frame to the subframe with the terminal for sending the random access preamble, receiving a random access response related to the random access preamble a base station, characterized in that for transmitting the frame information.
  12. A base station transmitting a random access response,
    Receiving unit receiving a random access preamble; And
    And a transmitter for transmitting a random access response related to the random access preamble,
    Wherein the transmitter, the base station characterized in that prior to receiving the random access preamble, and transmits the information on the resource blocks to which the random access response allocated to a terminal.
  13. A method for the base station performing the random access procedure,
    Receiving a random access preamble;
    Determining, based on the random access response message formats configured for the random access response related to the random access preamble or configure the random access response EPDCCH set; And
    It comprises the step of sending the random access response.
  14. 14. The method of claim 13,
    If the configuration wherein the random access response based upon the random access response message formats, the random access response method is transmitted through a search space which is set by the random access response message format.
  15. 14. The method of claim 13,
    If on the basis of the random access response message format which the random access response configuration, where the RA-RNTI value of the random access response is determined by one or more of the number of iterations, and the random access response message The format of the random access preamble .
  16. A method for the UE to perform a random access procedure,
    Transmitting a random access preamble;
    Monitoring the at least one search space, which is set by the random access response message formats, or monitoring the random access response EPDCCH set on the basis of the random access response EPDCH set of configuration information; And
    According to the results of monitoring comprises the step of receiving a random access response related to the random access preamble.
  17. 17. The method of claim 16,
    The random access of the search space, which is set by the response message format PRB or a VRB is by the total PRB number, slot number, and the random access response PRB number and function of the RA-RNTI in a message format for constituting the DL system band width how that decision.
  18. 17. The method of claim 16,
    The RA-RNTI value in the random access response method that is determined by one or more of the number of iterations, and the random access response message The format of the random access preamble.
  19. The base station performing the random access procedure,
    Receiving unit receiving a random access preamble;
    Control unit which on the basis of the random access response message formats configured for the random access response related to the random access preamble or configure the random access response EPDCCH set; And
    A base station including a transmitter for sending the random access response.
  20. In the terminal to perform the random access procedure,
    Sending unit for sending a random access preamble;
    The random access response message formats for monitoring at least one search space, or based on a random access response EPDCH set configuration information control unit for monitoring the random access response EPDCCH set is set for each; And
    Therefore, the terminal comprising a receiver configured to receive a random access response related to the random access preamble to the monitoring result.
PCT/KR2014/009471 2013-10-10 2014-10-08 Method for transmitting and receiving random access response, and apparatus therefor WO2015053553A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
KR20130120267 2013-10-10
KR10-2013-0120267 2013-10-10
KR10-2013-0132334 2013-11-01
KR20130132334 2013-11-01
KR10-2014-0084249 2014-07-07
KR20140084249A KR20150042689A (en) 2013-10-10 2014-07-07 Methods for Transmitting and Receiving Random Access Response and Apparatuses Thereof
KR1020140099563A KR20150051303A (en) 2013-11-01 2014-08-04 Methods for random access in wireless communication systems and Apparatuses Thereof
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