Abstract:
An apparatus and a method for assigning resources in a wireless communication system are provided to detect initial transmission easily by making a base station include an indicator, for indicating the initial transmission, in an initial transmission packet and transmitting the initial transmission packet with the indicator. A method for assigning resources in a wireless communication system comprises the following several steps. A controller of a base station assigns a persistent resource of a set amount to a specific user(800). The controller checks whether it comes to transmission time to which the persistent resource is assigned(802). If so in the step 802, the controller checks whether a sub packet to be transmitted currently is a retransmission sub packet(804). If not in the step 802, the controller waits to the next slot(810). If so in the step 804, the controller transmits the retransmission packet(806). If not in the step 804, the controller transmits a sub packet to be transmitted initially and a PSI(Packet Start Indicator) by using a persistently assigned resource(808) and waits to the next slot(810).
Abstract:
A method and an apparatus for transceiving a control channel message in a mobile communication system by using MIMO(Multi Input Multi Output) are provided to transmit the pilot information of a precoding format or various formats through the message of a shared control channel, thereby improving capacity and managing resources efficiently. A method for recording and transmitting the message of a shared control channel in a BS(Base Station) comprises the following steps of: determining whether a common pilot is used for a terminal(300); determining whether a knockdown precoder is used for the terminal(310); determining whether the terminal is in an MCW(Multi Codeword) MIMO mode(320); selecting universal matrix index as precoding information according to knockdown precoding and determining PFs(Packet Formats) by a layer for the MCW MIMO mode(322); determining a use of an MCW-FLAM(Forward Link Assignment Message) for the shared control channel(324); recording the universal matrix index in the pilot/MIMO field of the MCW-FLAM and reflecting a rank for the MCW MIMO mode to a PF field to record the PFs by a layer(326); recording the remaining fields of the MCW-FLAM(328); and transmitting an FLAM including the recorded fields to the terminal(380).
Abstract:
A method and an apparatus for transmitting and receiving feedback information in a wireless packet data communication system are provided to increase the efficiency of resource management by enabling an AN(Access Node) to select a single user MIMO mode and a multi-user MIMO mode dynamically. An AT(Access Terminal) in a wireless packet data communication system which supports both a single user MIMO mode and a multi-user MIMO mode comprises a channel estimator(22), a CQI(Channel Quality Indicator) predictor(23), an absolute CQI feedback signal generator(24), a relative CQI feedback signal generator(25), and a controller(26). Using a pilot signal received from an AN, the channel estimator estimates a channel for the single user MIMO mode and a channel for the multi-user MIMO mode. Based on the estimated channels, the CQI predictor calculates channel information for the single user MIMO mode and the multi-user MIMO mode. The absolute CQI feedback signal generator creates the first feedback information based on a basic MIMO mode notified from the AN. In this case, the basic MIMO mode is either the single user MIMO mode or the multi-user MIMO mode. The relative CQI feedback signal generator creates the second feedback information based on the other MIMO mode. The controller controls the CQI feedback signal generators according to the basic MIMO mode.
Abstract:
A method and an apparatus for hopping CDMA(Code Division Multiple Access) control segments in a mobile communication system are provided to enhance inverse link capacity by maximizing diversity effect on channel and interference according to hopping rules. An apparatus for hopping CDMA(Code Division Multiple Access) control segments in a mobile communication system includes a hopping area determiner(507) and a communication unit. The hopping area determiner determines the number of hopping areas to be represented frequency intervals for hopping the CDMA control segments using the total number of tiles used in the system and the number of tiles included in the CDMA control segment or the total number of sub-carriers used in the system and the number of sub-carriers included in the CDMA control segment, and calculates start points of the hopping areas using the determined number of the hopping areas. The communication unit transmits or receives control information through the CDMA control segment.
Abstract:
An apparatus and a method for sharing resources in an OFDM(Orthogonal Frequency Division Multiplexing) system is provided to solve a problem of a method for grouping users by using a bit map that resources allocated to the user groups are not completely used by the users. A transmission module generates a forward data channel as an OFDM symbol and transmits it to a radio network. A resource allocation controller(310) allocates resources to VoIP(Voice over Internet Protocol) group users and allocates resources corresponding to a channel ID to a data user who has assigned the channel ID from a mobile communication system so that the data user can use the allocated resources. The resource allocation controller controls such that the data user uses resources that are not used among the resources corresponding to the channel ID and the resources allocated to the group users. Remaining resources of the group users are obtained by using bit map information of the group users.
Abstract:
본 발명은 OFDMA 시스템에서의 데이터 송수신 장치 및 그에 따른 데이터 송수신 방법에 관한 것이다. 본 발명은 시스템은 채널 부호화된 데이터에 대해 HARQ 기능을 수행하기 위해 서브 패킷을 생성하고, 상기 생성된 서브 패킷을 미리 결정된 우선 순위에 따라 수신기에 대한 자원 블록별로 인터리빙을 수행하고, 상기 자원 블록별 서브 패킷과, 상기 서브 패킷의 할당 정보가 포함된 제어 메시지를 수신기에 전송하는 송신기와, 상기 송신기로부터 자원 블록별로 수신된 데이터를 각 자원 블록별로 디인터리빙하고, 상기 제어 메시지를 근거로 상기 디인터리빙된 데이터를 결합하는 수신기를 포함함을 특징으로 한다. 본 발명의 송수신 방법은 송신기에서 상기 데이터에 대해 HARQ 기능을 수행하기 위해 서브 패킷을 생성하는 과정과, 상기 생성된 서브 패킷을 미리 결정된 우선 순위에 따라 수신기에 대한 자원 블록별로 인터리빙을 수행하는 과정과, 상기 자원 블록별 데이터와, 상기 데이터의 할당 정보가 포함된 제어 메시지를 수신기에 전송하는 과정과, 상기 수신기에서 상기 송신기로부터 자원 블록별로 수신된 데이터를 각 자원 블록별로 디인터리빙하는 과정과, 상기 제어 메시지를 근거로 상기 디인터리빙된 데이터를 결합하는 과정을 포함함을 특징으로 한다. OFDMA, 자원블록,HARQ, 서브패킷
Abstract:
A method and an apparatus for allocating forward resources in an OFDMA(Orthogonal Frequency Division Multiple Access) system are provided to improve resource allocation efficiency by allocating different IDs for respective receivers according to the number of resources for the receivers. A base station transmitter(900) includes a downlink scheduler/controller(902), which allocates different short MAC(Media Access Control) IDs to respective terminals. Data symbols, which are generated in a symbol generator for control channel(904), a data symbol generator for UE(User Equipment)1(906), and a data symbol generator for UEN(908), are inputted to an S/P converter(910) and converted into a parallel signal. The result is inputted to a mapper(912). Data symbols for the terminals, which are mapped into sub-carriers in the mapper, are converted into time domain signals in an IFFT(Inverse Fast Fourier Transform)(914). The result is converted to serial OFDM samples in a P/S converter(916). The result is inputted to a guard interval inserter(918).
Abstract:
A frequency hopping method in a wireless communication system and an apparatus thereof are provided to transmit blocks sequentially and consecutively and improve channel estimation performance through pilot symbols in the consecutive blocks by partially or entirely restricting hopping in a HARQ(Hybrid Automatic Repeat Request) RTT(Round Trip Time). A frequency hopping apparatus in a wireless communication system comprises a hopping sequence input value generating part(701), a hopping sequence generating part(400), and a control part(702). The hopping sequence input value generating part(701) generates and outputs a hopping sequence input value. The hopping sequence generating part(400) generates a hopping sequence using the output of the hopping sequence input value generating part(701). The control part(702) executes a control operation so that data transmission and reception can be performed according to the generated hopping sequence.
Abstract:
A method for processing an HARQ(Hybrid Automatic Repeat Request) in a mobile communication system is provided to increase the usage efficiency of resources by operating a suitable HARQ method according to a resource allocation method. A method for processing a HARQ in a mobile communication system includes the steps of: determining a multiplex mode to make a DRCH(Distributed Resource CHannel) puncturing the resources of an LRCH(Localized Resource CHannel)(503); determining persistent allocation when the DRCH is the multiplex mode puncturing the resources of the LRCH(505); determining the use of a possible DRCH channel after the persistent allocation is early terminated when an allocation method is not the persistent allocation(509); and using an S-HARQ(Synchronous-HARQ) when the possible DRCH channel is not used after the persistent allocation is early terminated(511).
Abstract:
A transmission/reception apparatus and method for supporting both high rate packet data transmission and OFDM(Orthogonal Frequency Division Multiplexing) transmission in a mobile communication system are provided to offer an improved high speed packet data service by supporting mutually different transmission methods to a slot of a multi-carrier. An OFDM transmission processor(716) modulates physical layer packet data according to an OFDM transmission method. An EVDO(Evolution Data Only) transmission processing unit(710) modulates the physical layer packet data according to an EVDO transmission method. An HRPD(High Rate Packet Data) compatible processor(714) generates an output signal of the OFDM or EVDO transmission processing units(716,710) as a transmission signal, and transmits it to a radio network. An OFDM/EVDO selecting controller(712) controls such that the transmission signal is transmitted according to a selected one of the OFDM transmission method and the EVDO transmission method.