Abstract:
PROBLEM TO BE SOLVED: To provide a device and a method for repetitive transmission and reception for physical layer channel coding which transmit a channel-coded signal at a position where maximum time diversity can be secured when a signal after non-memory error correction channel coding is repeatedly transmitted. SOLUTION: This repetitive transmission and reception device for non- memory error correction channel coding performs non-memory error correction channel coding for information to be sent, repeats a channel-coded signal, positions the repeated signal at a position where maximum time diversity can be secured, and then sends the positioned signal. This invention is usable for the repetitive transmission and reception of a signal after non-memory error correction channel coding.
Abstract:
Provided is a method for transmitting/receiving control information needed between Medium Access Control (MAC) layers of a base station and a mobile station by using a control channel block in a packet-based mobile communication system, which is under discussion for standardization, while minimizing the use of a control channel block. The method for transmitting control information for controlling a mobile station in a packet-based mobile communication system with uplink and downlink schedulers, which includes: a) forming a control channel block including control information for controlling the mobile station and identification (ID) information for identifying the control information transmitted to the mobile station; and b) coding the control channel block and transmitting the coded control channel block to the mobile station.
Abstract:
A method for establishing synchronization with a user equipment in a base station of a wireless communication system, comprising: transmitting random access channel information to the user equipment (S62); receiving a random access message corresponding to the random access channel information from the user equipment (S63); and transmitting a response message including information for establishing synchronization to the user equipment (S63), wherein the random access channel information includes random access channel allocation information.
Abstract:
A method for managing a multicast and broadcast service in a base station according to an embodiment of the present invention includes: transmitting a multicast and broadcast service control channel to a terminal; transmitting an indicator channel for indicating a change of the multicast and broadcast service control channel by using a unicast control channel when the multicast and broadcast service control channel is changed, to the terminal; and transmitting the changed multicast and broadcast service control channel to the terminal.
Abstract:
Provided is a method for indicating a mobile station maintaining radio resource control (RRC) connection but not maintaining uplink physical layer synchronization to receive downlink signals when packet data to be transmitted to the mobile station are generated to thereby make the mobile station start uplink signal transmission. The method includes: (a) allocating a random access preamble index and generating a downlink signal reception indication message including the allocated random access preamble index in a base station; (b) transmitting the generated downlink signal reception indication message to the mobile station; (c) forming a response message to random access, when a preamble signal designated by the random access preamble index is transmitted from the mobile station in response to the downlink signal reception indication message; and (d) transmitting the response message to random access to the mobile station to thereby control uplink physical layer synchronization.
Abstract:
The present invention relates to a wireless communication system that counts UEs using an MBMS, and a method thereof. The wireless communication system is connected with a UE through a radio link, and includes a Node B and a controlling radio network controller (CRNC). The Node B receives sequence setting information on a sequence included in a preamble transmitted from the UE from a network manager. The CRNC controls the Node B, detects a sequence according to whether to use an MBMS based on the sequence setting information, and performs a counting process for counting UEs based on whether the UE uses the MBMS. According to the present invention, counting of UEs using an MBMS can be efficiently performed by using a predetermined sequence. Particularly, the counting process can be simplified by reducing complexity in access probability management of a network manager, thereby increasing efficiency in data transmission by reducing signaling for random access probability and omitting a random access probability calculation process.
Abstract:
The present invention relates to an apparatus and method for modulating data by employing orthogonal variable spreading factor (OVSF) codes in a mobile communication system. A code generating means generates at least one spreading code to be allocated to a channel and is selected such that two consecutive pairs of in-phase (I) and quadrature (Q) data correspond to two points located on the same point in the phase domain (see figure) or are symmetrical with respect to the zero point (see fig. 9) . Data for transmission is then spread using the generated code and phase rotated by a Walsh rotator such that the phase difference between consecutive points is ninety degrees (90{). The ninety degree phase difference leads to a reduction in the peak to average power ratio (PAPR) of a mobile station. Preferably the orthogonal complex quadrature phase shift keying (OCQPSK) modulation scheme is adopted.