摘要:
A method for transmitting and receiving a control channel message in a mobile communication system using multiple antennas is provided. A base station determines whether a common pilot is used or a dedicated pilot is used. It also determines whether a corresponding Multiple Input Multiple Output (MIMO) mode is a Multi-CodeWord (MCW) MIMO mode or a Single CodeWord (SCW) MIMO mode, and determines whether knockdown precoding is used or ready-made precoding is used. The base station generates a control channel message field including a pilot pattern and a precoding type according to the determination results, and transmits the generated control channel message to the terminal. The terminal receives a control channel message transmitted from a base station. The terminal determines whether a common pilot is used or a dedicated pilot is used, whether a corresponding MIMO mode is an MCW MIMO mode or an SCW MIMO mode, and whether knockdown precoding is used or ready-made precoding is used. The terminal analyzes the control channel message field according to the determination results, and determines a data reception method according to the analysis result.
摘要:
The present invention relates to a method and system for the management of the mobility, the management of an idle mode, the registration management (management of attachment and detachment), and the location management (management of tracking area) of a terminal by using a non-access stratum (i.e., network stratum, hereinafter referred to as “NAS”) in a mobile telecommunication network. To this end, the method for the management of mobility, the management of an idle mode, the registration management, and the location management of a terminal by using a NAS protocol, i.e., messages, according to an embodiment of the present invention, includes a terminal (hereinafter, referred to as “UE”) and a mobility management entity (hereinafter, referred to as “MME”), and addresses to a method for efficiently processing security protected NAS messages if received messages are security protected NAS messages, in a case of sending or receiving messages serving as EMM (EPS Mobility Management) messages, i.e., mobility management messages, in a network such as an EPS (Evolved Packet System) of 3GPP, when the terminal performs handover in an active mode, performs location management in an idle mode, and registers to a network, thereby achieving improved efficiency in the mobility management, the position management, and the registration management of a terminal.
摘要:
A mapping method and an apparatus, which uniformly distribute bits included in transmission symbols to various resource blocks in mapping the transmission symbols to the resource blocks for transmission in an OFDMA mobile communication system. A sub-packet generator generates a sub-packet by selecting symbols from coded symbols including a first bit group and a second bit group, the first bit group having a different priority than the second bit group. A divider divides each bit group of the sub-packet into as many bit streams as previously allocated resource blocks. A resource block mapper maps the divided bit streams to the resource blocks, respectively, and outputs the bit streams for transmission.
摘要:
A method for transmitting data in an Orthogonal Frequency Division Multiple Access (OFDMA) system. The data transmission method includes determining a number of diversity tiles, each of which includes physically separated frequency resources; dividing an entire system band into diversity subbands including the diversity tiles and localized subbands including localized tiles, each of which includes physically adjacent frequency resources, when the determined number of diversity tiles is greater than a threshold; uniformly distributing the diversity tiles over the entire system band, and disposing the localized tiles in the remaining bands except for the diversity tiles, when the determined number of diversity tiles is not greater than the threshold; and transmitting data to multiple terminals over the configured diversity tiles and localized tiles using diversity transmission and localized transmission schemes.
摘要:
In a wireless communication system a control channel is required in order to use limited resources effectively. However, the control channel resource is part of the system overhead, and thus reduces the data channel resource used for data transmission. In the long term evolution (LTE) system based on OFDM, one sub frame the consists of fourteen OFDM symbols wherein a maximum of three OFDM symbols are used for the control channel resource and remaining eleven OFDM symbols are used for the data channel resource. Therefore, the quantity of energy that can be transmitted for the control channel resource is extremely limited compared to the data channel resource. For this reason, the coverage of the control channel becomes less than that &; of the data channel, and even if a user can successfully receive the data channel, reception failure of a control channel sometimes˜results in failure of data recovery. In the present invention, in order to expand the coverage of the control channel to at least the coverage of the data channel, the time resource of the transmission resource wherein the control channel is transmitted is expanded and allocated for sending and receiving the control channel. By way of methods for extending the time resource are provided a method wherein a plurality of sub frames are used to transmit one control channel, and a method wherein a part of a data channel is used for the control channel.
摘要:
A method for transmitting/receiving a data control channel in a wireless communication system that transmits packet data. The transmission method includes transmitting packet data over a packet data channel, transmitting a control channel and receiving an ACKnowledgement (ACK) signal from a terminal that has received the control channel. The reception method includes receiving packet data and a control channel, acquiring control information by demodulating the control channel, and detecting an error in the control channel, and sending the error detection result to a base station as an ACK signal, if the control channel has been transmitted to the terminal itself.
摘要:
A method and apparatus for configuring a channel node tree in an OFDMA wireless communication system are provided, in which as many DRCH nodes as the number of DRCHs used for a frame are configured at base nodes, as many BRCHs as the number of DRCHs are selected from among BRCHs used for the frame, BRCH nodes with unselected BRCHs are configured at base nodes, and upper nodes are configured using the base nodes corresponding to the DRCH nodes and the BRCH nodes.
摘要:
A method and apparatus for transmitting/receiving a shared control channel message in an Orthogonal Frequency Division Multiple Access (OFDMA) wireless communication system are provided. The message transmission apparatus receives feedback information from a terminal; determines whether to transmit data by applying preceding; and transmits, in the shared control channel message, control information whose message type is differently set according to the application of the preceding. The message reception apparatus receives the shared control channel message from a base station; determines a message type of the shared control channel message; and if the message type is a Transmit Diversity (TD)-Forward Link Assignment Message (FLAM), demodulates data by at least one of Single Input Single Output (SISO) and Spatial Time Transmit Diversity (STTD) as indicated by the TD-FLAM.
摘要:
A mapping method and an apparatus, which uniformly distribute bits included in transmission symbols to various resource blocks in mapping the transmission symbols to the resource blocks for transmission in an OFDMA mobile communication system. A sub-packet generator generates a sub-packet by selecting symbols from coded symbols including a first bit group and a second bit group, the first bit group having a different priority than the second bit group. A divider divides each bit group of the sub-packet into as many bit streams as previously allocated resource blocks. A resource block mapper maps the divided bit streams to the resource blocks, respectively, and outputs the bit streams for transmission.
摘要:
A method for mapping a Physical Downlink Control Channel (PDCCH) to resources and an apparatus for transmitting/receiving the mapped PDCCH in a wireless communication system are provided, in which if at least one PDCCH is scheduled to be transmitted in a subframe according to a predetermined scheduling scheme, the PDCCHs are concatenated, interleaved, and mapped to at least one Resource Element (RE).