KR101432103B1 - System and method for configuring the receiving pattern of mobile terminals using downlink control channels in high-speed wireless communication systems - Google Patents

Abstract

In the present invention, the BS indicates a reception pattern of the HS-PDSCH to the MS using the HS-SCCH Order scheme, and the MS receives the downlink HS-PDSCH only at a location indicated by the BS so that the BS minimizes the use of the HS- The present invention relates to a method and system for setting a reception pattern of a terminal using a downlink control channel in a high-speed wireless communication system, in which a terminal can significantly reduce received power consumption of a terminal during a reception of an HS-PDSCH.
A reception pattern setting system according to the present invention includes: a base station for transmitting reception pattern indication information to a downlink control channel; And a user terminal for receiving a next packet of the HS-PDSCH from the base station based on the reception pattern indication information received from the base station.
According to the present invention, it is possible to reduce unnecessary reception power consumption generated in the HS-SCCH-less operation. Also, since the present invention informs the HS-PDSCH reception pattern (reception start time, reception period) of the UE using the HS-SCCH order, the UE can receive the HS-PDSCH only in its own period. Also, since the terminal can know the location of its packet transmission, it is not necessary to perform blind decoding in all TTIs and power consumption due to packet reception can be reduced. Therefore, when the present invention is used, the base station can minimize the use of the HS-SCCH, and the terminal can significantly reduce the received power consumption of the terminal during the reception of the HS-PDSCH.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a system for setting a reception pattern of a terminal using a downlink control channel in a high-speed wireless communication system,

The present invention relates to a method and system for setting a reception pattern of a mobile station using a downlink control channel in a high-speed wireless communication system that provides a plurality of low-speed services. The base station transmits a HS- And the terminal can minimize the use of the HS-SCCH by receiving the downlink HS-PDSCH only at the position indicated by the base station, and the terminal can reduce the received power consumption of the terminal significantly in the process of receiving the HS-PDSCH And more particularly, to a method and system for setting a reception pattern of a terminal using a downlink control channel in a high-speed wireless communication system.

In general, HSDPA (High-Speed Downlink Packet Access) has adopted a variety of technologies to improve the downlink transmission rate up to 14.4 Mbps in the existing R99 WCDMA system.

HSDPA, which supports high-speed transmission rate, introduces 16-QAM (4 bits / symbol) which increases the number of bits per symbol compared with the existing QPSK, and modulator method and channel coding rate Adaptive Modulation & Coding (AMC) technology applied dynamically.

In order to quickly recover an error occurring in the physical layer, HARQ (Hybrid ARQ) technology combining FEC (Forward Error Correction) and ARQ (Automatic Repeat request) is applied and a plurality of channelization codes (Up to 15).

In addition, the TTI (Transmission Time Interval) is shortened to 2 ms, and performs a packet scheduling function capable of freely allocating downlink radio resources on a per TTI basis based on the downlink quality information transmitted from the UE.

In addition, HSDPA reduced the complexity of the system by using a diffusion coefficient fixed to SF16 regardless of the data rate. The present invention is supported by changing the number of codes to be used and the modulation and coding scheme (MCS) used in each code channel without controlling the various transmission speeds of data with diffusion coefficients. The maximum transmission rate, 14.4 Mbps, which can be supported by the HSDPA system, corresponds to the case where 15 SF16 codes are used among the OVSF codes and the 16QAM modulation scheme is used in each code channel.

On the other hand, in the HSDPA system, the MS observes a high-speed shared control channel (HS-SCCH) every TTI (2 ms) to determine whether there is data transmitted to the MS. The MS receives the HS-PDSCH (High Speed-Physical Downlink Shared Channel) code and the modulation information through the HS-SCCH, and after the two slots, And receives the HS-PDSCH.

Such traditional HSDPA operation is not suitable for low-speed real-time services such as VoIP (voice over IP). If there are many voice services in the cell, frequent resource allocation for the downlink is required, but the scheduling operation of the HSDPA is restricted because only about four HS-SCCHs exist per cell. For example, VoIP voice packets are small enough to be transmitted using one HS-PDSCH (approximately 300 bits). When a large number of VoIP services are supported, a large number of HS-PDSCHs are used (up to 15). If only a small number of HS-SCCHs set in a cell are used, all HS-PDSCH resources can not be allocated at the same time.

In order to solve the above problems, HS-SCCH-less operation is introduced. Basically, the HS-SCCH-less operation differs from the conventional HSDPA method. In the HS-SCCH-less operation, the transmission of the packet is directly transmitted over the HS-PDSCH without using the HS-SCCH. Since the base station does not indicate the location of the HS-PDSCH received by the terminal (i.e., does not use the HS-SCCH), the system indicates the specific HS-PDSCH to be observed by the terminal in advance and the terminal continuously transmits the HS- Decode. The UE decodes the corresponding HS-PDSCH every TTI, and whether the packet is transmitted to itself can be known after the packet is completely recovered. The process of receiving only the HS-PDSCH and recovering its own information is called blind decoding.

In the HS-SCCH-less operation, a maximum of four transport formats (decoding structure information of data) is designated to help blind decoding of the terminal. In addition, all transmission formats use only QPSK in the modulation scheme, and the terminal observes only one or two HS-PDSCH codes.

After performing blind decoding, the MS uses a 24-bit cyclic redundancy check (CRC) field included at the end of the packet to determine the destination of data reception. Since the CRC is XORed with the H-RNTI (HS-DSCH radio network temporary identity), which is the identification information of the terminal, the terminal can simultaneously determine whether the packet is in error and the target terminal.

If the data reception is successful, the terminal transmits an ACK through the HS-DPCCH but does not transmit any information if the data reception fails. That is, if blind decoding fails, the NAK information is not transmitted to the base station.

If the base station transmits a packet but does not receive any response from the terminal, the base station determines that the transmission has failed. If the base station decides to retransmit the packet, it supports HARQ operation using HS-SCCH without using blind decoding.

1 is a diagram illustrating a basic concept of a conventional HS-SCCH-less.

Referring to FIG. 1, HS-SCCH-less transmits a packet to a UE without using HS-SCCH. The UE must continuously decode a specific HS-PDSCH to determine whether its data is transmitted. FIG. 1 shows a situation where data of the terminal A is transmitted. Terminal A successfully receives its information in the second TTI of the HS-PDSCH and transmits ACK to the base station. However, the data of the terminal A that the base station sends next is not successfully received. At this time, the terminal does not transmit the NAK to the base station. Therefore, since the base station has not received the ACK, it regards the previously transmitted data as failed and retransmits the data using the HS-SCCH.

In the initial HSDPA, since the HS-PDSCH is reported through the HS-SCCH, the UE receives the HS-SCCH preferentially. The UE having the identification information indicated by the HS-SCCH receives the appropriate HS-PDSCH based on the decoding information included in the HS-SCCH. Through this process, the terminal receives the HS-PDSCH at the precise location where the packet is transmitted.

In the method using the HS-SCCH, the UE first observes the HS-SCCH and only receives the HS-PDSCH when necessary. However, since the number of UEs supported at the same time is limited to four, it is difficult to effectively support a plurality of low-rate services. Therefore, in order to support a plurality of voice services using HSDPA technology, the system and the UE must operate in the HS-SCCH-less manner.

Compared with the method using HS-SCCH, a terminal supporting HS-SCCH-less operation is characterized in that HS-PDSCH is continuously received without distinguishing the receiving destination of the packet. In particular, since the HS-PDSCH channel includes a very large size of information as compared with the HS-SCCH channel, more power is consumed in the decoding process than in the HS-SCCH. Therefore, the operation of HS-SCCH-less is very inefficient in terms of power consumption of the terminal. Accordingly, there is a demand for a periodic HS-PDSCH reception technique capable of reducing unnecessary reception power consumption that may occur in HS-SCCH-less operation.

SUMMARY OF THE INVENTION An object of the present invention to solve the above-mentioned problems is to provide a method and apparatus for a mobile communication system in which a base station indicates a reception pattern of an HS-PDSCH to a mobile station using an HS-SCCH Order scheme and a mobile station receives a downlink HS- A method of setting a reception pattern of a terminal using a downlink control channel in a high-speed wireless communication system in which the use of the HS-SCCH can be minimized and the terminal can significantly reduce the reception power consumption of the terminal during the reception of the HS- System, a base station, a downlink reception pattern setting method thereof, a user terminal and a downlink reception pattern setting method thereof.

According to an aspect of the present invention, there is provided a reception pattern setting system including: a base station for transmitting reception pattern indication information to a downlink control channel; And a user terminal for receiving a next packet of the HS-PDSCH from the base station based on the reception pattern indication information received from the base station.

According to another aspect of the present invention, there is provided a base station including: a communication unit for communicating with a user terminal through a communication network; A reception pattern generation unit for generating reception pattern instruction information to be transmitted to the user terminal; A reception pattern transmission unit for transmitting the generated reception pattern to the user terminal; And a control unit for controlling generation and transmission of the reception pattern and the transmission packet.

In addition, the reception pattern indication information includes a reception start time and a reception period of the HS-PDSCH required for periodic reception of the HSDPA packet.

In addition, the controller transmits the reception pattern indication information to the user terminal in the HS-SCCH order scheme.

The HS-SCCH Order scheme uses an order type field and an order info field of the HS-SCCH.

In addition, the HS-SCCH Order scheme indicates reception pattern indication information by setting the first bit of the order type field to '1', and indicates the reception start time and reception period in units of TTI do.

In addition, the HS-SCCH Order method sets a reception start time of the HS-PDSCH with the user terminal in advance and includes only the reception period of the HS-PDSCH in the reception pattern indication information.

When the control unit does not receive a response (ACK) for the transport packet including the reception pattern indication information from the user terminal, the control unit retransmits the transport packet to the user terminal using the HS-SCCH.

According to another aspect of the present invention, there is provided a user terminal comprising: a communication unit for communicating with a base station through a communication network; A packet processing unit for processing packet data transmitted from the base station and including reception pattern indication information received through the communication unit; And a control unit for attempting to receive the next packet data at a point indicated by the reception pattern indication information included in the received packet data.

The control unit receives the packet data including the reception pattern indication information through the communication unit in the HS-SCCH order scheme, and transmits ACK data in the uplink via the HS-DPCCH to the UE To the base station.

Also, the control unit attempts to receive the next packet data of the HS-PDSCH at a reception start time included in the reception pattern indication information according to a reception period.

Also, the reception pattern indication information includes a receiving start time and a receiving period of the HS-PDSCH.

Also, the control unit receives packet data including the reception pattern indication information from the base station through the communication unit in the HS-SCCH order scheme.

The HS-SCCH Order scheme uses an order type field and an order info field of the HS-SCCH.

In the HS-SCCH Order scheme, the first bit of the order type field is set to '1' to indicate a reception pattern, and the remaining 5 bits are used to indicate a reception start time and a reception period in TTI units.

In the HS-SCCH Order scheme, reception start point of the HS-PDSCH is fixedly set in advance with the base station, and reception pattern indication information including only the HS-PDSCH reception period is used.

According to another aspect of the present invention, there is provided a method of establishing a downlink reception pattern according to the present invention, the method comprising: (a) Generating a transport packet; (b) transmitting, by the base station, a transmission packet including the reception pattern indication information to the user terminal in an HS-SCCH order scheme; (c) the UE receiving the transmission packet including the reception pattern indication information from the BS in an HS-SCCH order scheme; And (d) receiving the next packet from the base station based on the reception pattern indication information included in the received transmission packet.

According to another aspect of the present invention, there is provided a method of establishing a downlink reception pattern for a base station, the method comprising: (a) Generating transmission packets by including reception pattern indication information on the data; And (b) transmitting a transmission packet including the reception pattern indication information to the user terminal.

In addition, the reception pattern indication information includes a reception start time and a reception period of the HS-PDSCH required for periodic reception of the HSDPA packet.

In the step (b), the transmission packet including the reception pattern indication information is transmitted to the user terminal in an HS-SCCH order scheme.

The HS-SCCH Order scheme uses an order type field and an order info field of the HS-SCCH.

In the HS-SCCH Order scheme, the first bit of the order type field is set to '1' to indicate a reception pattern, and the remaining 5 bits are used to indicate a reception start time and a reception period in TTI units.

In addition, the HS-SCCH Order scheme uses the reception pattern indication information including the reception period of the HS-PDSCH including the reception period of the HS-PDSCH.

If the mobile station does not receive a response (ACK) for the transport packet including the reception pattern indication information from the user terminal after step (b), it transmits the transport packet to the user terminal using the HS-SCCH Retransmit.

According to another aspect of the present invention, there is provided a method for establishing a downlink reception pattern of a user terminal communicating with a base station through a communication network, the method comprising: (a) Receiving packet data including instruction information; (b) attempting to receive the next packet data based on the received pattern indication information included in the received packet data; And (c) receiving the next packet data from the base station at the start of reception based on the reception pattern indication information.

In addition, the step (a) may include receiving the packet data including the reception pattern indication information in the HS-SCCH order scheme, and transmitting ACK data in the uplink through the HS-DPCCH to the base station Lt; / RTI >

In addition, the step (c) receives the HS-PDSCH packet data according to a reception period from the base station at the start of reception by the reception pattern indication information.

Also, the reception pattern indication information includes a receiving start time and a receiving period of the HS-PDSCH.

In the step (a), the packet data including the reception pattern indication information is received in the HS-SCCH order scheme using the order type field and the order info field of the HS-SCCH.

In the HS-SCCH Order scheme, the first bit of the order type field is set to '1' to indicate a reception pattern, and the remaining 5 bits are used to indicate a reception start time and a reception period in TTI units.

In the HS-SCCH Order scheme, reception start point of the HS-PDSCH is fixedly set in advance with the base station, and reception pattern indication information including only the HS-PDSCH reception period is used.

According to the present invention, it is possible to reduce unnecessary reception power consumption generated in the HS-SCCH-less operation.

Also, since the present invention informs the HS-PDSCH reception pattern (reception start time, reception period) of the UE using the HS-SCCH order, the UE can receive the HS-PDSCH only in its own period.

Also, since the terminal can know the location of its packet transmission, it is not necessary to perform blind decoding in all TTIs and power consumption due to packet reception can be reduced.

Therefore, when the present invention is used, the base station can minimize the use of the HS-SCCH, and the terminal can significantly reduce the received power consumption of the terminal during the reception of the HS-PDSCH.

1 is a diagram illustrating a basic concept of a conventional HS-SCCH-less.
2 is a diagram illustrating a subframe structure of the HS-PDSCH used in the present invention.
3 is a block diagram schematically illustrating a configuration of a reception pattern setting system according to an embodiment of the present invention.
4 is a block diagram illustrating a functional block of a base station according to an embodiment of the present invention.
5 is a block diagram illustrating a functional block of a user terminal according to an embodiment of the present invention.
FIG. 6 is an overall flowchart illustrating a method of setting a DL reception pattern according to an embodiment of the present invention.
7 is a flowchart illustrating a method of setting a downlink reception pattern of a base station according to an embodiment of the present invention.
8 is a flowchart illustrating a method of setting a DL reception pattern of a user terminal according to an embodiment of the present invention.
9 is a diagram illustrating an example of HSDPA data transmission according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In order to support the HSDPA used in the present invention, additional physical channels are required unlike the conventional WCDMA. These are HS-PDSCH (High-Speed Physical Downlink Shared Channel) for transmitting user data, HS-SCCH (High-Speed Shared Control Channel) for informing decoding information of HS-PDSCH in advance, And a High Speed-Dedicated Physical Control Channel (HS-DPCCH) indicating the transmission success.

The HS-PDSCH refers to each code channel using SF16, and up to 15 HS-PDSCHs can be used in HSDPA. The modulation scheme can use QPSK or 16QAM according to the downlink state, and the channel coding rate can be generated with various values based on a 1/3 turbo code. The TTI, which is the transmission period of the data, is shortened to 2ms as compared with the WCDMA system, enabling efficient and fast transmission according to the channel state of each terminal. In addition, a hybrid automatic repeat request (HARQ) scheme is adopted for data transmission, and it is easy to recover lost data during transmission. The difference between HARQ and the existing ARQ scheme is that previously transmitted data is not discarded but is combined with newly transmitted data and used for decoding.

Also, in the HSDPA system, power control is not performed on the HS-PDSCH. All base stations transmit data using the power allocated for the HSDPA service almost constantly. Therefore, power control is not performed in the downlink. For this reason, the downlink transmission rate control employs adaptive modulation and coding (AMC), which selects an appropriate modulation and coding scheme considering channel conditions of each terminal. In addition, hard handover is used to receive data from only one base station without supporting soft handover to reduce radio resource waste.

2 is a diagram illustrating a subframe structure of the HS-PDSCH used in the present invention.

Referring to FIG. 2, one sub-frame can be regarded as one TTI, has a length of 2 ms, and has three time slots inside. The amount of data that can be transmitted is determined according to the state of the downlink, the selected AMC, and the number of codes, and the data is transmitted in each time slot. Also, the amount of data to be transmitted can be determined according to the modulation scheme to be used. Referring to FIG. 2, when 16QAM is used, it can be seen that data of about 2 times as much as QPSK can be included.

Meanwhile, HS-SCCH (High Speed-Shared Control Channel) includes various control information used for successfully recovering HS-PDSCH data in a UE. In particular, the channel transmits HS-PDSCH decoding information by two slots (Time Slot) ahead of the HS-PDSCH so that the UE can receive the HS-PDSCH decoding information in advance. Two kinds of information are transmitted to the HS-SCCH. In the first time slot, information on the code information (starting position and number of codes used) and modulation scheme used in the HS-PDSCH is transmitted. In the second and third time slots, the information is transmitted through the HS-DSCH Whether the packet is a new packet, a transmission block size, and a redundancy version for HARQ. In particular, the first slot and the third slot include identification information for indicating a terminal receiving the HS-PDSCH.

If HS-SCCH information is not received, HS-SCCH information is very important because data received via the HS-PDSCH can not be recovered. Therefore, it is necessary to transmit using a relatively high transmission power, and a terminal at the cell boundary must also be able to receive the HS-SCCH. According to the standard, a terminal must be able to observe up to four HS-SCCHs at the same time. For reference, the number of HS-SCCHs is equal to the number of terminals that can simultaneously receive data every TTI.

The information on the HS-SCCH consists of the contents shown in Table 1 below. Of the total 3 slots, the first slot transmits 8 bits including the channelization code and the modulation scheme, and the remaining 29 bits are transmitted in the second and third slots. Thanks to this structure, when the UE receives only the first slot of the HS-SCCH, it can know the position of the HS-PDSCH to be received and the modulation scheme.

field Number of bits Contents Channelization  code 7 With data Channelization  Code set Modulation method One Modulation method of transmitted data Transport block size 6 Transport block ( transport block ) size HARQ  process 3 Retransmitted HARQ  Process instructions RCV
( redundancy and constellation version ) 3 Retransmission decoding information NDI ( new data indicator ) One Data instruction to transmit first CRC  + Terminal identification information 16 CRC And H- RNTI To XOR  Computed value

Also, HS-DPCCH (High Speed-Dedicated Physical Control Channel) transmits uplink ACK / NAK information and CQI (Channel-Quality Indication) information supporting uplink HSDPA operation. The HS-DPCCH is composed of three slots. In the first slot, ACK / NAK information indicating the success of the received data is provided. In the second and third slots, CQI information indicating the quality of the downlink is transmitted. One HS-DPCCH is set per terminal.

Meanwhile, the HS-SCCH order has been proposed for the purpose of activating or stopping a specific operation of a terminal using an HS-SCCH channel. Therefore, the HS-SCCH order is not related to the HS-PDSCH transmission unlike the conventional HS-SCCH channel. That is, the HS-SCCH Order has only a purpose of controlling the operation of the terminal using the existing HS-SCCH channel. The field structure of the HS-SCCH remains the same to support the HS-SCCH order while maintaining the structure of the conventional HS-SCCH, but each field has a different meaning from the conventional one. Table 2 shows the field structure and description for the HS-SCCH Order.

HS - SCCH order Number of bits Contents Channelization  Code + modulation method 8 Fixed to 11100000 Transport block size 6 Fixed to 111101 Order type 3 HS - SCCH order Target operation to which Order info 3 The specific operation control information of the terminal CRC + terminal identification information 16 CRC And H- RNTI To XOR  Computed value

If the first 8 bits are set to '11100000' and the next 6 bits are set to '111101' in the HS-SCCH field, the corresponding HS-SCCH channel is regarded as an HS-SCCH order. The next three bits indicate an operation type to which the HS-SCCH Order is applied, and the next three bits include specific operation information of the terminal in the corresponding technology. In the conventional HS-SCCH channel structure, a new data indicator (NDI) indicating whether data is new is not utilized in the HS-SCCH order. The last 16 bits indicate the target terminal to receive the corresponding HS-SCCH order as in the conventional case.

Table 3 below describes the order type and order info of the HS-SCCH Order defined in the standard.

Order type Order info Contents 000 100 HS - SCCH of DRX  Supports motion 010 UL DPCCH of DTX  Supports motion 001 HS - SCCH less  Supports motion 001 001 Having a dual carrier HSDPA  support

The order type designates only two types. When set to 000, it means an HS-SCCH order when operating with a single carrier (5 MHz). When set to 001, a dual-carrier x < 2 >). If the discontinuous reception (DRX) operation of the HS-SCCH is set to 010 and the discontinuous transmission (DTX) operation of the uplink DPCCH is set to 001 in case of a single carrier (order type = 000) Indicates HS-SCCH-less operation. On the other hand, when operating as a dual carrier (order type = 001), if the order info is set to 001, it means that the terminal supports HSDPA technology with a dual carrier.

3 is a diagram schematically showing an example of the overall configuration of a reception pattern setting system according to an embodiment of the present invention.

3, a reception pattern setting system 300 according to the present invention includes a base station 310, a communication network 320, and a user terminal 330.

The base station 310 includes reception pattern indication information in the packet data to be transmitted, and transmits the packet data to the user terminal 330 in the HS-SCCH order scheme.

The communication network 320 includes a CDMA 2000 1x, a CDMA 2000 1x EV-DO, a WCDMA network, a TD-SCDMA, an HSPA network including HSDPA and HSUPA, and the like.

The user terminal 330 receives the next packet of the HS-PDSCH from the base station 310 based on the reception pattern indication information included in the packet data received from the base station 310.

4 is a block diagram illustrating a functional block of a base station according to an embodiment of the present invention.

4, a base station 310 according to the present invention includes a communication unit 410, a transmission packet generation unit 420, a packet transmission unit 430, and a control unit 440.

The communication unit 410 communicates with the user terminal 330 through the communication network 320.

The transmission packet generation unit 420 generates a transmission packet by including reception pattern instruction information in the packet data to be transmitted to the user terminal 330. [ Here, the reception pattern indication information includes a reception start time and a reception period of the HS-PDSCH required for periodic reception of the HSDPA packet.

The packet transmission unit 430 transmits the generated transmission packet to the user terminal 330. For example, the packet transmission unit 430 may be implemented as a scheduler that schedules packets to be transmitted to the user terminal 330.

The control unit 440 controls generation and transmission of transport packets.

In addition, the control unit 440 transmits the transmission packet including the reception pattern instruction information to the user terminal 330 in the HS-SCCH order scheme. At this time, the HS-SCCH Order scheme uses an order type field and an order info field of the HS-SCCH.

In the HS-SCCH Order scheme, the first bit of the order type field is set to '1' to indicate the reception pattern, and the remaining 5 bits are used to indicate the reception start time and reception period in TTI units.

In addition, the HS-SCCH Order scheme uses reception pattern indication information including a reception start timing of the HS-PDSCH and a reception period of the HS-PDSCH fixedly beforehand.

If the control unit 440 does not receive a response (ACK) to the transport packet including the reception pattern indication information from the user terminal 330, the control unit 440 transmits the transport packet to the user terminal 330 using the HS-SCCH Retransmit.

5 is a block diagram illustrating a functional block of a user terminal according to an embodiment of the present invention.

5, a user terminal 330 according to the present invention includes a communication unit 510, a packet processing unit 520, a control unit 530, a display unit 540, a storage unit 550, and an input unit 560 do.

The communication unit 510 communicates with the base station 310 through the communication network 320.

The packet processing unit 520 processes the packet data including the reception pattern indication information transmitted from the base station 310 and received through the communication unit 510.

The control unit 530 attempts to receive the next packet data at a point indicated by the received pattern instruction information included in the received packet data.

The display unit 540 displays the packet data processed through the packet processor 520. [ Also, the display unit 540 displays the operation state of the terminal.

The storage unit 550 stores the received packet data or the processed data in the terminal.

The input unit 560 is used when receiving or selecting commands or data from the user.

In addition, the controller 530 receives the packet data including the reception pattern indication information through the communication unit 510 in the HS-SCCH order scheme, and transmits a response (ACK) in the uplink through the HS- And transmits the data to the base station 310.

In addition, the control unit 530 tries to receive the next packet data of the HS-PDSCH at the reception start time included in the reception pattern indication information according to the reception period. At this time, the reception pattern indication information includes a reception start time and a reception period of the HS-PDSCH.

In addition, the control unit 530 receives the packet data including the reception pattern instruction information from the base station 310 through the communication unit 510 in the HS-SCCH order scheme.

Here, the HS-SCCH Order scheme uses an order type field and an order info field of the HS-SCCH. In the HS-SCCH Order scheme, the first bit of the order type field is set to '1' to indicate the reception pattern, and the remaining 5 bits are used to indicate the reception start time and reception period in TTI units. In the HS-SCCH Order method, the reception start time point of the HS-PDSCH and the reception start time point of the HS-PDSCH are fixedly set in advance and the reception pattern indication information including only the HS-PDSCH reception period is used.

FIG. 6 is an overall flowchart illustrating a method of setting a DL reception pattern according to an embodiment of the present invention.

Referring to FIG. 6, the base station 310 generates a transmission packet including reception pattern indication information (S610).

Then, the base station 310 transmits the transmission packet including the reception pattern indication information to the user terminal 330 in the HS-SCCH order manner (S620).

Meanwhile, the user terminal 330 analyzes the transmission packet including the reception pattern indication information received from the base station 310 in the HS-SCCH order scheme (S630).

Then, the user terminal 330 receives the next packet from the base station 310 based on the reception pattern indication information included in the received transmission packet (S640).

7 is a flowchart illustrating a method of setting a downlink reception pattern of a base station according to an embodiment of the present invention.

Referring to FIG. 7, the base station 310 according to the present invention generates a transmission packet including reception pattern indication information through the transmission packet generation unit 420, with respect to initial packet data to be transmitted to the user terminal 330 (S702).

At this time, the base station 310 generates a transport packet using the order type field and the order info field of the HS-SCCH. In addition, the reception pattern indication information includes a reception start time and a reception period of the HS-PDSCH required for periodic reception of the HSDPA packet.

Then, the base station 310 transmits the transmission packet including the reception pattern indication information to the user terminal 330 in the HS-SCCH order manner (S704).

In this case, the HS-SCCH Order scheme can use the order type field and the order info field of the HS-SCCH. The first bit of the order type field is set to '1' to indicate the reception pattern. And indicates the receiving start time and the receiving period in TTI units.

In addition, the HS-SCCH Order scheme can use the reception pattern indication information including only the reception period of the HS-PDSCH by setting the reception start timing of the HS-PDSCH with the user terminal 320 fixed in advance.

Then, the base station 310 determines whether packet data to be transmitted exists in a buffer (S706).

If the packet data to be transmitted is present in the buffer (S708-Yes), the base station 310 generates a next transmission packet at the reception start point of the HS-PDSCH indicated by the user terminal 330 (S710).

In step S712, the base station 310 transmits the next transmission packet to the user terminal 330 at the indicated location corresponding to the reception pattern indication information included in the transmission packet previously transmitted for the generated transmission packet.

In step S716, the base station 310 receives ACK data for the transmission packet from the user terminal 330 in step S714. If the service is terminated in step S716, And ends the operation.

On the other hand, if ACK data for the transmission packet is not received from the user terminal 330 (NO at S714), the base station 310 determines that the transmitted packet is an error, And generates a retransmission packet (S720).

Then, the base station 310 explicitly specifies the HS-PDSCH using the HS-SCCH and retransmits the transmission packet to be retransmitted to the user terminal 330 through the packet transmission unit 430 (S722).

If the packet to be transmitted does not exist in the buffer in step S708 (NO in step S708), the base station 310 waits until the next transmission position where packet data to be transmitted next is generated (step S730) The process proceeds to step S710 after the next transmission packet is generated at the designated position corresponding to the reception pattern instruction information.

8 is a flowchart illustrating a method of setting a DL reception pattern of a user terminal according to an embodiment of the present invention.

Referring to FIG. 8, the user terminal 330 according to the present invention receives packet data including reception pattern indication information from the base station 310 (S810).

At this time, the reception pattern indication information includes a reception start time and a reception period of the HS-PDSCH.

Accordingly, the user terminal 330 extracts the reception start time and the reception time from the reception pattern indication information (S820). This is to receive the next packet data of the HS-PDSCH according to the reception period from the base station at the reception start time.

Then, the user terminal 330 attempts to receive the next packet data based on the reception pattern instruction information included in the received packet data (S830).

That is, the user terminal 330 receives the HS-SCCH by using the order type field and the order info field of the HS-SCCH.

Here, the HS-SCCH Order scheme indicates the reception pattern by setting the first bit of the order type field to '1', and indicates the reception start time and reception cycle in units of TTI using the remaining 5 bits. In addition, the HS-SCCH Order method can set reception start time of the HS-PDSCH and the reception start time point of the HS-PDSCH fixedly and use reception pattern indication information including only the reception period of the HS-PDSCH.

9, the user terminal 330 receives the next packet data from the base station 310 at the reception position specified in the HS-SCCH Order (S840).

9, since the location and the reception period of the next TTI to be received are known through the previously transmitted packet, the user terminal 330 transmits the data via the HS-PDSCH in the designated TTI shown in FIG. . Therefore, blind decoding of the HS-PDSCH is performed at the reception position specified in the HS-SCCH Order. 9 is a diagram illustrating an example of HSDPA data transmission according to an embodiment of the present invention.

When the user terminal 330 has successfully received the packet data (S850-YES), the user terminal 330 transmits uplink ACK data to the base station 310 through the HS-DPCCH (S860).

If the packet is successfully received, the user terminal 330 transmits an ACK in the uplink through the HS-DPCCH.

When the service is terminated (S870-Yes), the user terminal 330 ends the operation of receiving the packet data from the base station 310. If the service is not terminated (S870-No) The process returns to step S830 to attempt to receive the next packet data based on the received pattern instruction information included in the received packet data.

On the other hand, when the user terminal 330 has not successfully received the packet data from the base station 310 (S850-No), the user terminal 330 does not transmit any response information on the uplink.

The reason why the user terminal 330 can not receive the HS-PDSCH in its own period is that the HS-PDSCH does not include its own packet or fails to receive the HS-PDSCH. In the former case, there is no particular problem. The base station scheduler does not transmit the packet because there is no packet of the corresponding terminal. Therefore, the terminal attempts to receive a new packet in the next cycle. On the other hand, in the latter case, additional consideration is needed for rapid retransmission of the packet. Since the base station 310 can not receive the ACK from the UE, it determines that the transmitted packet is in error and indicates the HS-PDSCH to be received by the UE using the HS-SCCH to retransmit the packet. Since the second transmitted packet in FIG. 9 has not been successfully received, the base station 310 retransmits the packet by further using the HS-SCCH channel. In addition, in FIG. 9, it can be seen that reception patterns other than retransmission maintain a unique period

If the HS-SCCH for retransmission is received from the base station 310 in step S880, the user terminal 330 receives the retransmission packet on the HS-PDSCH specified by the HS-SCCH in step S890.

As described above, according to the present invention, a base station indicates a reception pattern of an HS-PDSCH to a terminal using an HS-SCCH order scheme, and a terminal receives a downlink HS-PDSCH only at a corresponding location, And the terminal can greatly reduce the received power consumption of the terminal in the process of receiving the HS-PDSCH, a method and system for setting a reception pattern of a terminal using a downlink control channel in a high-speed wireless communication system, A downlink reception pattern setting method, a user terminal and a downlink reception pattern setting method thereof.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims and their equivalents. Only. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

The present invention can be applied to a high-speed wireless communication system for transmitting packet data from a base station to a user terminal.

In addition, the present invention can be applied to a base station that minimizes the use of the HS-SCCH and a user terminal that requires a technique for reducing power consumption in the process of receiving the HS-PDSCH.

The present invention can be applied to a base station providing a packet service using HSDPA technology to a user terminal.

100: reception pattern setting system 310: base station
320: communication network 330: user terminal
410: communication unit 420: transmission packet generation unit
430: Packet transmission unit 440:
510: communication unit 520: packet processing unit
530: Control section 540: Display section
550: storage unit 560: input unit

Claims (25)

delete A communication unit for communicating with a user terminal through a communication network;
A reception pattern generation unit that generates reception pattern indication information indicating a time at which specific packet data of all packet data is to be received by the user terminal;
And a reception pattern transmission unit transmitting the packet data including the generated reception pattern designation information to the user terminal and receiving only the specific packet data based on the reception pattern designation information at the user terminal Base station. 3. The method of claim 2,
The reception pattern instruction information
And a reception start time and a reception period for receiving only the specific packet data among all packet data transmitted from the base station through the HS-PDSCH. 3. The method of claim 2,
And the control unit transmits the reception pattern indication information to the user terminal in the HS-SCCH order scheme. 5. The method of claim 4,
In the HS-SCCH Order scheme,
The first bit of the order type field included in the packet data including the reception pattern indication information is set to '1' to indicate the reception pattern indication information, and the remaining bits excluding the first bit of the order type field And indicates the reception start time and the reception period in TTI units. 5. The method of claim 4,
Wherein the HS-SCCH Order scheme sets a reception start timing of the HS-PDSCH with the user terminal in advance and includes only the reception period of the HS-PDSCH in the reception pattern indication information. A communication unit for receiving, from the base station, packet data including reception pattern indication information indicating a time at which specific packet data transmitted from the base station communicates with a base station through a communication network and is to be received by a user terminal;
A packet processing unit for processing the packet data including the received reception pattern indication information; And
And a controller for receiving only the specific packet data transmitted from the base station based on the reception pattern indication information included in the received packet data. delete 8. The method of claim 7,
The reception pattern instruction information
And a reception start time and a reception period for receiving only the specific packet data among all packet data transmitted from the base station through the HS-PDSCH. 8. The method of claim 7,
Wherein the control unit receives the packet data including the reception pattern indication information from the base station through the communication unit in the HS-SCCH order scheme. 11. The method of claim 10,
In the HS-SCCH Order scheme,
The first bit of the order type field included in the packet data including the reception pattern indication information is set to '1' to indicate the reception pattern indication information, and the remaining bits excluding the first bit of the order type field And indicates the reception start time and the reception period in TTI units. 11. The method of claim 10,
Wherein the HS-SCCH Order scheme sets reception start time of the HS-PDSCH with the base station in advance and uses reception pattern indication information including only a reception period of the HS-PDSCH. delete A downlink code channel communication method of a base station communicating with a user terminal via a communication network,
(a) generating reception pattern indication information indicating a time at which specific packet data of all packet data to be transmitted is received by the user terminal; And
(b) transmitting packet data including the generated reception pattern designation information to the user terminal, and allowing the user terminal to receive only the specific packet data based on the reception pattern designation information, How to set the link reception pattern. 15. The method of claim 14,
The reception pattern instruction information
And a reception start time and a reception period for receiving only the specific packet data among all the packet data transmitted from the base station through the HS-PDSCH. 15. The method of claim 14,
Wherein the step (b) comprises transmitting the packet data including the reception pattern indication information to the user terminal in an HS-SCCH order scheme. 17. The method of claim 16,
In the HS-SCCH Order scheme,
The first bit of the order type field included in the packet data including the reception pattern indication information is set to '1' to indicate the reception pattern indication information, and the remaining bits excluding the first bit of the order type field And the reception start time and the reception period are indicated in units of TTI. 17. The method of claim 16,
Wherein the HS-SCCH Order scheme sets reception start time of the HS-PDSCH with the user terminal in a fixed manner and uses reception pattern indication information including only a reception period of the HS-PDSCH. How to set the reception pattern. 15. The method of claim 14,
If the UE does not receive a response (ACK) for the packet data including the reception pattern indication information from the user terminal after the step (b), it retransmits the transmission packet to the user terminal using the HS-SCCH Wherein the downlink reception pattern setting method comprises: A method for establishing a downlink reception pattern of a user terminal communicating with a base station via a communication network,
(a) receiving, from the base station, packet data including reception pattern indication information indicating a time at which specific packet data of the entire packet data transmitted from the base station communicates with the base station via the network, ; And
(b) receiving only the specific packet data based on the reception pattern indication information included in the received packet data. 21. The method of claim 20,
In step (a), packet data including the reception pattern indication information is received in the HS-SCCH order scheme and ACK data in the uplink is transmitted to the base station through the HS-DPCCH when the packet data is successfully received And transmitting the downlink reception pattern to the user terminal. delete 21. The method of claim 20,
The reception pattern instruction information
And a reception start time and a reception period for receiving only the specific packet data from the entire packet data transmitted from the base station through the HS-PDSCH. 22. The method of claim 21,
In the HS-SCCH Order scheme,
The first bit of the order type field included in the packet data including the reception pattern indication information is set to '1' to indicate the reception pattern indication information, and the remaining bits excluding the first bit of the order type field And the reception start time and the reception period are indicated in units of TTI. 22. The method of claim 21,
Wherein the HS-SCCH Order scheme sets reception start time of the HS-PDSCH with the base station in advance and uses reception pattern indication information including only a reception period of the HS-PDSCH, How to set the reception pattern.

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