KR101839596B1 - Method and apparatus for setting frequency resource of uplink control channel - Google Patents

Method and apparatus for setting frequency resource of uplink control channel Download PDF

Info

Publication number
KR101839596B1
KR101839596B1 KR1020160009633A KR20160009633A KR101839596B1 KR 101839596 B1 KR101839596 B1 KR 101839596B1 KR 1020160009633 A KR1020160009633 A KR 1020160009633A KR 20160009633 A KR20160009633 A KR 20160009633A KR 101839596 B1 KR101839596 B1 KR 101839596B1
Authority
KR
South Korea
Prior art keywords
resource
control channel
resource block
uplink control
block index
Prior art date
Application number
KR1020160009633A
Other languages
Korean (ko)
Other versions
KR20160092508A (en
Inventor
최성우
김준형
Original Assignee
한국전자통신연구원
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 한국전자통신연구원 filed Critical 한국전자통신연구원
Publication of KR20160092508A publication Critical patent/KR20160092508A/en
Application granted granted Critical
Publication of KR101839596B1 publication Critical patent/KR101839596B1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT

Abstract

There is provided a frequency resource setting method and apparatus for an uplink control channel. The UE receives information including a first resource block index corresponding to a basic frequency resource from a Node B, and transmits a first resource block index, a second resource block for a frequency resource of an uplink control channel And calculates a resource block index for a new uplink control channel frequency resource using an index. Then, the frequency resource corresponding to the calculated resource block index is set as a resource for transmission of the next uplink control channel signal.

Description

[0001] The present invention relates to a method and apparatus for setting a frequency resource of an uplink control channel,

The present invention relates to a method and apparatus for setting frequency resources for an uplink control channel.

An LTE (Long Term Evolution) system uses an orthogonal frequency division multiplexing (OFDM) transmission scheme, sets a specific frequency for uplink transmission, performs a UL transmission using a specific frequency set by a plurality of terminals, , And transmits signals orthogonal to each other.

The uplink control channel is a physical layer channel for transmitting control information related to downlink control information or control information related to uplink transmission. A signal transmitted through an uplink control channel includes channel quality information (CQI) A hybrid automatic repeat request (HARQ) -ACK (acknowledgment), which is an uplink response signal according to downlink data transmission, or a scheduling request signal for requesting scheduling.

In the LTE system, the frequency band for the uplink control channel is fixed, and frequency hopping is performed for each slot within one frame composed of two slots. However, when the set frequency resource for the uplink control channel undergoes severe fading or the filter characteristic located at the analog end is bad, the transmission error rate increases.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and apparatus for efficiently setting frequency resources for an uplink control channel.

A method of establishing a frequency resource according to an aspect of the present invention includes a step in which a terminal receives information including a first resource block index corresponding to a basic frequency resource from a base station in a method of setting uplink control channel frequency resources ; Calculating a resource block index for a new uplink control channel frequency resource using the first resource block index and a second resource block index for a frequency resource of an uplink control channel allocated to the user equipment ; And setting a frequency resource corresponding to the calculated resource block index as a resource for a next uplink control channel signal transmission.

According to the embodiment of the present invention, since the frequency resource for the uplink control channel can be changed, the frequency selectivity for the control channel can be increased, thereby improving the transmission error rate of the uplink control channel signal.

Considering the importance of the control channel information, the stability of the intra-cell wireless network can be secured by transmitting the uplink control channel signal through the frequency resource with better performance in response to the change of the channel actively.

1 is an exemplary diagram illustrating radio resources according to an embodiment of the present invention.
2 is a diagram illustrating an uplink control channel resource block in an uplink time-frequency resource in an LTE system.
3 is a flowchart of a frequency resource setting method according to an embodiment of the present invention.
4 is a diagram illustrating an example of a new resource block allocated according to an embodiment of the present invention.
5 is a structural diagram of a frequency resource setting apparatus according to an embodiment of the present invention.

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

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

Throughout the specification, a terminal is referred to as a mobile terminal (MT), a mobile station (MS), an advanced mobile station (AMS), a high reliability mobile station (HR- A subscriber station (SS), a portable subscriber station (PSS), an access terminal (AT), a user equipment (UE) , HR-MS, SS, PSS, AT, UE, and the like.

Also, a base station (BS) is an advanced base station (ABS), a high reliability base station (HR-BS), a node B, an evolved node B, eNodeB), an access point (AP), a radio access station (RAS), a base transceiver station (BTS), a mobile multihop relay (MMR) (RS), a relay node (RN) serving as a base station, an advanced relay station (ARS) serving as a base station, a high reliability relay station (HR) A femto BS, a home Node B, a HNB, a pico BS, a metro BS, a micro BS, ), Etc., and all or all of ABS, Node B, eNodeB, AP, RAS, BTS, MMR-BS, RS, RN, ARS, HR- And may include negative functionality.

Hereinafter, a frequency resource setting method and apparatus for an uplink control channel according to an embodiment of the present invention will be described with reference to the drawings.

1 is an exemplary diagram illustrating radio resources according to an embodiment of the present invention.

In OFDMA (orthogonal frequency division multiplexing access), a mobile station located in a cell allocates a radio resource, i.e., a time-frequency resource, from a base station. When one slot is composed of 40 OFDM symbols and a frequency band is divided into 50 resource blocks, a time-frequency resource corresponding to one slot is shown in FIG.

The base station performs scheduling for time-frequency resources as shown in FIG. 1 and allocates slots and frequency resource blocks to the UE. At this time, the BS allocates time-frequency resources unique to the UEs so that resources allocated among the UEs do not overlap.

However, in a system such as LTE, time-frequency resources for an uplink control channel are shared between terminals, and terminals transmit signals orthogonal to each other. Sharing the time-frequency resource is to secure a large capacity of the uplink data channel. The information transmitted through the uplink control channel includes a downlink scheduling request, a channel quality information (CQI), a hybrid automatic repeat request (HARQ) -ACK (acknowledgment) And the like. If an error occurs in a signal including information transmitted through the uplink control channel (hereinafter, referred to as an uplink control channel signal for convenience of description), the uplink control channel signal may have an influence on the entire network, Must be transmitted at a much lower error rate than the user data.

In a system such as LTE (Long Term Evolution), a physical uplink control channel (PUCCH) performs frequency hopping in one subframe in order to obtain a frequency diversity gain as a method for increasing a signal-to-noise ratio .

2 is a diagram illustrating an uplink control channel resource block in an uplink time-frequency resource in an LTE system.

The entire frequency band

Figure 112016008721919-pat00001
When divided into a number of resource blocks, the time-frequency resource can be represented as shown in FIG. Resource allocation and transmission are performed in units of subframes. One subframe is composed of two slots, and one slot may be composed of seven OFDM symbols as shown in FIG.

In the LTE system, the frequency band of the uplink control channel is allocated to both ends of the entire frequency band as shown in FIG. 2, and the data channel is allocated to the middle part of the entire frequency band. When the demand for the uplink control channel increases, resource blocks for the uplink control channel are further allocated based on the already allocated frequency bands of the allocated resources, i.e., resource blocks. Multiplexing is possible for 12 UEs in one resource block of the UL control channel, and each resource block is divided into resource indexes.

The uplink control channel is transmitted through different resource blocks in the first slot and the second slot, as shown in FIG. That is, when a radio resource for the uplink control channel is allocated to one subframe, as shown in FIG. 2, the first resource block (A, index = 0) is allocated in the slot 1 for the uplink control channel, In the remaining slot 2, the last resource block (A, index =

Figure 112016008721919-pat00002
-1). In the slots 1 and 2 constituting one subframe, the uplink control channel is transmitted through different resource blocks. Resource blocks allocated to slots 1 and 2 are referred to as "RB pairs ", and each RB pair is composed of two physical resource indices. Resource index
Figure 112016008721919-pat00003
, The resource A for the uplink control channel is expressed as (
Figure 112016008721919-pat00004
,
Figure 112016008721919-pat00005
) ≪ / RTI > For example, when four resource blocks are allocated for the uplink control channel, they have RB pairs (A, B, C, and D) as shown in FIG.

As described above, since the uplink control channel signal is transmitted using only the frequency band corresponding to the end in the entire frequency band, i.e., the outer band, if frequency selective fading occurs in the corresponding frequency band or the filter characteristic is bad, The transmission error rate is deteriorated.

In the embodiment of the present invention, frequency resources for the uplink control channel are dynamically moved and set.

A base station receives a signal transmitted through an uplink control channel, that is, an uplink control channel signal, and demodulates and processes the received uplink control channel signal. If the uplink control channel signal is not received for a predetermined time, a suitable frequency resource is searched for a new uplink control channel. The frequency resource is composed of a plurality of resource blocks. The BS can find a new frequency resource block using a sounding reference signal transmitted from the UE. When a new frequency resource block is found, the base station sets the found frequency resource block as a basic frequency resource and transmits information on the block to the terminal.

The UE calculates a new frequency resource using the basic frequency resource and the uplink control channel resource index. The frequency resource block is determined according to the number of times of intra hopping. At this time, the uplink control channel resource index and the calculation formula are system information, and the system information is transmitted to the terminal when each terminal is registered in the cell. The UE calculates a new frequency resource based on the uplink control channel resource index and a calculation formula, and performs a next uplink control channel transmission using the new frequency resource acquired according to the calculation as the uplink control channel frequency resource.

Since the signal can be transmitted through the resource block having a good channel state, the transmission performance of the uplink control channel can be enhanced.

Hereinafter, a method for allocating an uplink control channel resource according to an embodiment of the present invention will be described in more detail.

3 is a flowchart of a resource setting method according to an embodiment of the present invention.

The base station 1 receives a signal transmitted through an uplink control channel and demodulates the received signal (S100). The base station 1 determines whether an uplink control channel signal has been received from the terminal 2 to be detected.

Specifically, the base station 1 performs correlation processing between a signal made up of a resource index of an uplink control channel that has been allocated to the terminal 2 and a received signal, and calculates a value , And compares the correlation result value with a preset threshold value. If the correlation result value is less than the threshold value, the base station determines that the uplink control channel signal is not received from the corresponding terminal (S110, S120).

If the uplink control channel signal is not received from the UE for a predetermined time, i.e., the base station 1 does not receive the signal through the time-frequency resource of the allocated uplink control channel for a predetermined time, (S130).

If an error occurs, the frequency resource of the UL control channel is changed.

For this, channel information is acquired based on the sounding reference signal transmitted from the terminal 2. [ And obtains channel information by demodulating the sounding reference signal, and determines an appropriate basic frequency resource based on the acquired channel information. Then, the resource block index for the determined basic frequency resource is transmitted to the terminal 2 (S140). On the other hand, if no error occurs, an operation corresponding to the received signal is performed (S150).

 The terminal 2 receives information on a newly determined base frequency resource (resource block index, etc.) for the uplink control channel from the base station 1 (S160), and uses the new frequency resource . Specifically, the terminal 2 includes a resource block index (referred to as a first resource block index for the convenience of description) of a basic frequency resource and a resource block index corresponding to a resource of an uplink control channel A new resource block index for uplink control information transmission is calculated using the second resource block index (step S 170).

A method of calculating a new resource block index will be described in detail.

The frequency resource block is determined according to the formula given previously according to the number of times of hopping inside the frame. An equation for calculation of the resource block index and an index for the uplink control channel resources can be obtained from the system information.

The uplink control channel frequency hopping based on the new resource block index can be performed as follows. For example, it is assumed that the entire frequency band is composed of 50 resource blocks as shown in FIG. 1, and 12 signals orthogonal to each other can be transmitted through one resource block.

The physical resource block index assigned to the resource block is 0 to 49, and the resource block index corresponding to the base frequency resource determined by the base station

Figure 112016008721919-pat00006
Let's say. Then, the frequency hopping frequency is assumed to be one, and one frame is transmitted through two physical resource blocks. At this time, a frequency resource block index for uplink control channel transmission
Figure 112016008721919-pat00007
Can be determined as follows.

Figure 112016008721919-pat00008

here,

Figure 112016008721919-pat00009
Figure 112016008721919-pat00010
Figure 112016008721919-pat00011
Represents an OFDM symbol position. When one slot includes 40 OFDM symbols as shown in FIG. 1, OFDM symbols 0 to 19
Figure 112016008721919-pat00012
= 0, and 20 ~ 39 times
Figure 112016008721919-pat00013
= 1 < / RTI >

Also,

Figure 112016008721919-pat00014
Is determined according to the control channel resource index. The uplink control channel resource index allocated to the UE
Figure 112016008721919-pat00015
In other words,
Figure 112016008721919-pat00016
Can be expressed as follows.

Figure 112016008721919-pat00017

here,

Figure 112016008721919-pat00018
Is the number of subcarriers belonging to a resource block and is used to indicate the number of signals transmitted orthogonally to each other.

4 is a diagram illustrating an example of a new resource block allocated according to an embodiment of the present invention.

As illustrated in FIG. 4, a resource block index (first resource block index) corresponding to a basic frequency resource determined by the base station

Figure 112016008721919-pat00019
, And a resource block index (second resource block index) corresponding to a resource of the uplink control channel allocated to the UE
Figure 112016008721919-pat00020
, According to Equation (2) above,
Figure 112016008721919-pat00021
to be.
Figure 112016008721919-pat00022
, A frequency resource block index for a new uplink control channel transmission according to Equation (1)
Figure 112016008721919-pat00023
,
Figure 112016008721919-pat00024
Respectively. That is, the frequency resource block index corresponding to the first half OFDM symbol corresponding to 0 to 19
Figure 112016008721919-pat00025
And the frequency resource block index corresponding to the second half OFDM symbol corresponding to 20 to 39 is
Figure 112016008721919-pat00026
to be. The resource block corresponding to the calculated frequency resource block index is set as a resource for the next uplink control channel signal transmission. Therefore, in the next uplink control channel transmission, the first half OFDM symbol corresponding to the signal
Figure 112016008721919-pat00027
And the second half OFDM symbol is transmitted through the resource block corresponding to
Figure 112016008721919-pat00028
Lt; / RTI >

As described above, a new resource block index is calculated on the basis of the basic frequency resource block index and the resource block index of the UE. In the next uplink control information transmission sequence, the UE calculates a resource block corresponding to the newly calculated resource block index (S180, S190).

In this embodiment of the present invention, not only the frame transmission but also the number of frequency hopping may increase, and the rule (Equation 1) for allocating the resource blocks may be changed in consideration of this. When frequency hopping is performed once, two resources are required. Accordingly, the rule for allocating resource blocks is as shown in Equation 1 above. If frequency hopping is performed three times, four resources are required, so that Equation (1) can be changed as follows, for example.

Figure 112016008721919-pat00029

In general, a control channel determines a transmission frequency in advance and the UEs commonly use the control channel. In the embodiment of the present invention, as described above, the transmission band of the uplink control channel for transmitting uplink control information can be moved. Accordingly, it is possible to transmit the control channel signal through a band having a high performance. In addition, even when channel aggregation in which a plurality of frequency bands are integrated and transmitted is used, the transmission band of the control channel can be changed to transmit the signal.

5 is a structural diagram of a frequency resource setting apparatus according to an embodiment of the present invention.

5, the frequency resource setting apparatus 100 according to the embodiment of the present invention includes a processor 110, a memory 120, and a radio frequency (RF) converter 130 . The processor 110 may be configured to implement the method described above based on FIGS. 1-4.

To this end, the processor 110 includes a first index setting unit 111, a second index setting unit 112, and a transmission processing unit 113.

The first index setting unit 111 obtains a resource block index for a basic frequency resource transmitted from the base station. The reference frequency resource is a frequency resource determined according to a channel state determined based on a sounding reference signal provided from a terminal when an error occurs in a signal received through an uplink channel allocated to the terminal.

The second index setting unit 112 sets a resource block index (a first resource block index) of a basic frequency resource and a resource block index (a second resource block index) corresponding to a resource of an uplink control channel A new resource block index for uplink control information transmission is calculated. Since the specific calculation method is as described above, the detailed description is omitted here.

The transmission processing unit 113 performs transmission processing using the frequency resource corresponding to the resource block index calculated by the second index setting unit 112 at the time of transmitting the next uplink control channel signal.

The memory 120 is coupled to the processor 110 and stores various information related to the operation of the processor 110. [ The RF converter 130 is connected to the processor 110 and performs processing for transmitting or receiving a radio signal. Since the signal transmission and the signal reception processing are known technologies, detailed description thereof will be omitted here.

The embodiments of the present invention are not limited to the above-described apparatuses and / or methods, but may be implemented through a program for realizing functions corresponding to the configuration of the embodiment of the present invention, a recording medium on which the program is recorded And such an embodiment can be easily implemented by those skilled in the art from the description of the embodiments described above.

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

Claims (8)

In a method for a UE to set a frequency resource of an uplink control channel,
Wherein the frequency resource of the uplink control channel preset from the base station by the mobile station, wherein the frequency resource comprises a plurality of resource blocks and an index is assigned to each resource block, a first resource block index The method comprising the steps of:
Calculating a new resource block index corresponding to an arbitrary one of frequency resources of the uplink control channel based on the resource block indexes constituting the frequency resource of the first resource block index and the uplink control channel; And
Setting a frequency resource corresponding to the calculated resource block index as a resource for transmission of a next uplink control channel signal,
/ RTI >
Wherein the Node B receives information including a first resource block index corresponding to the basic frequency resource when the Node B does not receive the uplink control channel signal from the UE for a set time. The method according to claim 1,
Wherein the step of calculating the new resource block index comprises:
A second resource block index for a frequency resource of an uplink control channel allocated to the UE and a first resource block index for a frequency resource of the uplink control channel, The method of setting the index. The method according to claim 1,
Wherein the step of calculating the new resource block index comprises:
Wherein a new resource block index corresponding to an arbitrary resource among the frequency resources of the uplink control channel is calculated based on a calculation formula set differently according to the frequency hopping frequency. The method according to claim 1,
Wherein the step of calculating the new resource block index comprises:
A new resource block index corresponding to an arbitrary resource among the frequency resources of the UL control channel is calculated based on the first resource block index, the number of resource blocks constituting the frequency resource of the UL control channel, How to set it up. 5. The method of claim 4,
Wherein the variable value is calculated based on a second resource block index for a frequency resource of an uplink control channel allocated to the UE and a number of sub-carriers belonging to a resource block. delete The method according to claim 1,
Prior to receiving information comprising the first resource block index,
If the value obtained by the correlation processing between the signal generated by the resource block index for the frequency resource allocated to the terminal and the received signal is less than a preset threshold value, Determining that a channel signal is not received;
Setting the basic frequency resource if the base station determines that an uplink control channel signal is not received from the terminal; And
The base station transmitting information including a first resource block index against basic frequency resources to the terminal
Further comprising: 8. The method of claim 7,
Wherein the step of setting the basic frequency resource sets the basic frequency resource using channel information obtained based on the sounding reference signal transmitted from the terminal.
KR1020160009633A 2015-01-26 2016-01-26 Method and apparatus for setting frequency resource of uplink control channel KR101839596B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020150012274 2015-01-26
KR20150012274 2015-01-26

Publications (2)

Publication Number Publication Date
KR20160092508A KR20160092508A (en) 2016-08-04
KR101839596B1 true KR101839596B1 (en) 2018-03-19

Family

ID=56709516

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020160009633A KR101839596B1 (en) 2015-01-26 2016-01-26 Method and apparatus for setting frequency resource of uplink control channel

Country Status (1)

Country Link
KR (1) KR101839596B1 (en)

Also Published As

Publication number Publication date
KR20160092508A (en) 2016-08-04

Similar Documents

Publication Publication Date Title
KR102386714B1 (en) Method and device for selecting resource and transmitting pssch in wireless communication system
US11497004B2 (en) User terminal and radio communication method
CN110583069B (en) Terminal, base station, system and wireless communication method
US10827486B2 (en) Resource allocation method and communication device
EP3579643B1 (en) User terminal and radio communication method
US20190075547A1 (en) Method for transmitting data of v2x terminal in wireless communication system and device
US10820318B2 (en) User terminal, radio base station and radio communication method based upon downlink control in current subframe
KR20190034335A (en) Method and apparatus for transmitting D2D data of a terminal in a wireless communication system
JP6688882B2 (en) Terminal device, base station device, and communication method
US10849010B2 (en) Method and apparatus for transmitting SA and data associated with congestion control in wireless communication system
CN110740028A (en) Method for determining transmission resource block pool of terminal in D2D communication and device thereof
CN110800224B (en) Over-the-air calibration for reciprocity-based UL MIMO transmission
US9768940B2 (en) Method and device for transmitting and receiving signal in multi-cell cooperative communication system
RU2761394C1 (en) User terminal and method for radio communication
KR20190140986A (en) User terminal and wireless communication method
JP2019140436A (en) Communication device and communication method
CN112436927A (en) Side-link transport method and apparatus
US20210377883A1 (en) Method and apparatus for transmitting and receiving signal including cell information in communication system
KR102284377B1 (en) A method for a terminal to transmit a D2D signal in a wireless communication system supporting inter-terminal communication, and an apparatus therefor
US11424972B2 (en) User terminal and radio communication method
US11374616B2 (en) User terminal and radio communication method
CN111566958B (en) User terminal and wireless communication method
KR101839596B1 (en) Method and apparatus for setting frequency resource of uplink control channel
KR20170059911A (en) Method and apparatus for transmitting uplink signal
CN114845371A (en) Method, device and equipment for controlling power of side link control channel and readable storage medium

Legal Events

Date Code Title Description
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant