Abstract:
Disclosed is an apparatus for encoding TFCI bits in an asynchronous CDMA mobile communication system including a UE and a Node B for transmitting packet data to the UE. A TFCI bit generator creates the TFCI bits, the number of which is variable depending on an information bit ratio of the first channel to the second channel. A code length information generator generates code length information for setting a length of a codeword according to the information bit ratio. A Walsh code generator generates first to fifth basis Walsh codewords. A sequence generator generates an all-1 sequence. A mask generator generates first to fourth basis masks. First to tenth multipliers multiply the TFCI bits by the first to fifth basis Walsh codewords, the all-1 sequence and the first to fourth basis masks, respectively. An adder adds outputs of the first to tenth multipliers. A puncturer punctures a codeword output from the adder according to the code length information.
Abstract:
Disclosed is a method for measuring a propagation delay value of a frame transmitted by a UE to a Node B in a TDD mobile communication system. The UF. acquires synchronization with the Node B based on a downlink pilot channel signal transmitted in a period of a downlink pilot time slot, and determines an estimated round trip delay value T1 by comparing transmission power of a physical common channel signal in a first time slot with reception power of the physical common channel signal. Further, the UE transmits an uplink pilot channel signal by applying the estimated round trip delay value T1 to a desired transmission point of the uplink pilot channel signal. The UE receives a transmission point correcting value T2 through a forward physical access channel (FPACH) signal transmitted from the Node B in a period of one downlink time slot among the time slots, and transmits a physical random access channel (PRACH) message with the estimated round trip delay value T1 at a transmission point determined based on the transmission point correcting value T2 and the estimated round trip delay value T1, so that the PRACH message is received at the Node B at a start point of a period of one uplink time slot among the time slots.
Abstract:
An apparatus encodes an input information bit stream comprised of 5 bits into a (11,5) codeword comprised of 11 coded symbols. The apparatus comprises a Reed-Muller encoder for encoding the input information bit stream into a first order Reed-Muller codeword comprised of 16 coded symbols; and a puncturer for selecting a second coded symbol position or a third coded symbol position out of the 16 coded symbols constituting the first order Reed-Muller codeword, puncturing the coded symbols at intervals of 3 symbols beginning at the selected position, and thus outputting an optimal (11,5) codeword.
Abstract:
PURPOSE: A channel coder of a mobile communication system and an encoding method thereof are provided to transmit frame data of a low transmission rate without preform deterioration by using a repeater. CONSTITUTION: A channel coder of a mobile communication system includes a repeater, a first coder(115), a circular shift interleaver(113), and a second coder(117). The repeater generates an input sequence having symbols corresponding to a frame standard of N information bits by repeating input frames as much as a predetermined number. The first coder(115) is formed with an RSC coder in order to encode the output of the repeater and generate the first parity. The circular shift interleaver(113) is used for changing orders of information bits of the repeater. The second coder(117) is formed with the RSC coder to encode the output of the circular shift interleaver and generate the second parity.
Abstract:
PURPOSE: A common detection receiving apparatus irrespective of lengths of orthogonal codes in a mobile communication system and a method therefor are provided to use a common detection receiver by one system matrix although the lengths of the orthogonal codes used in the same time interval differ mutually. CONSTITUTION: A DSP(Digital Signal Processor) unit repeats and segments channelizing codes having variable lengths, and generates channelizing code blocks having the same length(S701). The DSP unit performs the channel impulse response and convolution operation of the channelizing code blocks, and obtains a combination impulse response(S702). The DSP groups the combination impulse response, and composes a common detection system sub-block matrix(S703). The DSP block shifts a plurality of the common detection system sub-block matrixes by a certain column interval, and composes a system matrix(S704).
Abstract:
본 발명은 부호분할다중접속 이동통신시스템의 송신장치에 관한 것이다. 전송 프레임들 각각은 복수의 타임슬롯들을 가지고, 상기 복수의 타임슬롯들 각각은 동일한 소정 길이를 가지는 두 개의 데이터 부분들과 상기 데이터 부분들 사이의 미드엠블 및 연속되는 타임슬롯과의 구분을 위한 보호구간을 가진다. 상기 송신장치는 상기 프레임들을 소정 변조신호에 의해 변조하고, 복수의 안테나를 이용하여 상기 변조된 무선신호를 전송한다. 전력 증폭기는 상기 무선신호를 증폭한다. 제어부는 상기 전력증폭기에 의해 증폭된 상기 무선신호에 대응한 프레임의 타임슬롯들이 가지는 보호구간에서 스위칭 제어신호를 발생한다. 스위치는 상기 스위칭 제어신호에 응답하여 상기 전력 증폭기로부터의 상기 증폭된 무선신호를 제1안테나와 제2안테나간에 스위칭 한다.
Abstract:
A method is disclosed for determining by a UTRAN a persistence value having a value between 0 and 1 for adjusting a number of access preambles from a plurality of UEs requiring assignment of a common packet channel (CPCH). The method includes the steps of counting a number of the access preambles detected in an access preamble period having a predetermined period; and determining the persistence value based on the number of counted access preambles. The persistence value is determined in a unit of transport format (TF), physical common packet channel (PCPCH), or CPCH set.
Abstract:
PURPOSE: A common packet channel setting apparatus and method in a CDMA communication system are provided to actively allocate CPCH required for a subscriber unit by a base station, reduce time required for setting up the CPCH and collision probability, and prevent consumption of radio sources. CONSTITUTION: A node B receives an AP preamble per access slot(4202). The node B checks an SF value indicated by a signature of the preamble(4204). The node B checks whether a PCPCH(Physical Common Packet CHannel) corresponding to the SF value is allocatable(4206). The node B determines a PCPCH to be allocated and an AP signature for transmitting ACK among allocatable SFs(4208). The node B simultaneously transmits the ACK signal for the determined AP and NAK for a non-selected AP by using an AP-AICH channel(4210). The node B receives a CD(Collision Detection) preamble from an access slot(4212). The node B determines a CD-P for transmitting ACK on the basis of a reception power level(4216). The node B increases a corresponding count(PSF) for the SF of the PCPCH(4218). The node B stores the increased value(4226). The node B checks a PCPCH corresponding to the stored SF(4220). The node B checks whether to stop using of PCPCH(4222). The node B reduces a count value(PSF) of the corresponding SF for the use-stop determined PCPCH(4224). The node B stores the reduced value(4226). The node B reports the stored count value in response to a request of a CRNC.
Abstract:
PURPOSE: A method and a device for controlling transmission power of a terminal device in a CDMA(Code Division Multiple Access) mobile communication system are provided to control transmission power for each channel separately, if more than two channels are arranged in the uplink. CONSTITUTION: A base station decides whether a UE(User Equipment) receiving an HS-DSCH(High Speed-Downlink Shared CHannel) from the base station is arranged in a soft handover region(900). The base station receives a pilot field of a UL_DPCCH(UpLink_Dedicated Physical Control CHannel) and a TPC(Transmit Power Control command) transmitted through the UL_DPCCH from the UE(901). The base station interprets the pilot field of the UL_DPCCH(902). The base station discriminates whether the received pilot field for an S-UL_DPCCH(Secondary_UL_DPCCH) or for a UL_DPCH(UpLink_Dedicate Physical CHannel)(903). If, for the UL_DPCH, the base station generates a TPC to be applied to the UL_DPCH(911), and if, for the S-UL_DPCCH, the base station generates a TPC to be applied to the S-UL_DPCCH(904). The base station decides downward transmission power according to the TPC received in the step 901, and transmits the TPC decided in the step 911 or 904 to the UE(905). If the UE is out of the soft handover region or the transmission of the HS-DSCH to the UE is completed(906), uplink transmission power to the UE is controlled through a normal power control algorithm(907).
Abstract:
PURPOSE: A method and a device for controlling uplink transmission power in a CDMA(Code Division Multiple Access) mobile communication system are provided to separately control transmission power for each channel if more than two channels are arranged on the uplink, and to perform power control for uplink channels if a UE(User Equipment) receiving HSPDA(High Speed Downlink Packet Access) is arranged in a soft handover region. CONSTITUTION: A UE receives a TPC(Transmit Power Control) command from a base station(1001). Whether the TPC command is for an S_UL_DPCCH(Secondary Uplink Dedicated Physical Control Channel) is decided(1002). If so, the TPC for the S_UL_DPCCH is separately interpreted from a TPC for a P_UL_DPCCH(Primary_UL_DPCCH) received from other base stations(1003), to decide transmission power for the S_UL_DPCCH and the P_UL_DPCCH(1004). Whether a time for transmitting the S_UL_DPCCH comes is decided(1005). If so, whether the decided transmission power for the S_UL_DPCCH exceeds a threshold is decided(1006). If not, pilot signals for the S_UL_DPCCH and the P_UL_DPCCH are generated(1007), and the P_UL_DPCCH and S_UL_DPCCH are transmitted with the decided transmission power(1008). In the case of exceeding the threshold in the step 1006, transmission power for the S_UL_DPCCH is decided by applying the threshold for the S_UL_DPCCH(1021), then the step 1007 is returned. If the TPC command is not for the S_UL_DPCCH in the step 1002, the TCP for the P_UL_DPCCH is interpreted(1011), to decide transmission power for the P_UL_DPCCH(1012). After deciding the transmission power for the P_UL_DPCCH in the step 1012 and if a time for transmitting the S_UL_DPCCH does not come in the step 1005, pilot signals for the P_UL_DPCCH are generated(1013), and the P_UL_DPCCH is transmitted with the transmission power decided in the step 1012 or 1004(1014). Whether the UE is out of a soft handover region or HS-DSCHs(High Speed Downlink Shared Channels) are completely received is decided(1009). If so, a normal power control algorithm is progressed, and if not, the step 1001 is returned to repeat the steps.