摘要:
A method and apparatus support a Mobile Station (MS) located in a collapsed cell area to be disconnected from a Base Station (BS) in a wireless communication system. A method of an MS for supporting an disconnected MS disconnected from a BS in a wireless communication system includes receiving a rescue signal from the disconnected MS; collecting information to determine a support MS for the disconnected MS; and transmitting the collected information to a serving BS.
摘要:
Provided is a power control apparatus and method of a time division duplex (TDD) communication system. The power control apparatus includes an uplink power determiner for determining an uplink power value using a power control computation element of a current frame, which is acquired using a power control computation element of a prior frame and a power increase/decrease change estimated from a downlink, and a cell interference received from a base transceiver station (BTS); and an uplink power controller for controlling an uplink power by sending the uplink power value from the uplink power determiner to a transmitter.
摘要:
Disclosed are a pilot tone generation apparatus and a pilot tone generation method for improving channel estimation performance in an OFDMA/CDM communication system. In a pilot tone generation method for channel estimation in a broadband wireless access communication system, if given data symbols and a pilot symbol are input, the input data symbols are code-division multiplexed. A pilot symbol value for generating a sub-carrier of a specific position into the pilot tone is produced and spread, correspondingly to a code-division multiplexed result value of the data symbols Also, a spreading value for the pilot symbol value and the resulting code-division multiplexed value of the data symbols are added up, and the pilot tone is generated at a given position on a frequency axis, which position is predetermined through a result of the adding up.
摘要:
An apparatus and method for allocating resources by using a codebook based on a resource size and a burst size in a broadband wireless communication system are provided. A method of operating a Mobile Station (MS) includes receiving a group configuration message from a Base Station (BS), wherein the group configuration message includes an N-bit first bitmap for indicating that M resource sizes are supported in the group among N resource sizes supported for group resource allocation, where M is less than N, and receiving a group resource allocation message from the BS, wherein the group resource allocation message includes a second bitmap for indicating a size of a resource allocated to a corresponding MS among MSs for which resource allocation is determined.
摘要:
A method and an apparatus for uplink power control using a ranging signal in a wireless communication system are provided. The method includes transmitting ranging channel information to a pico Base Station (BS), receiving power control information on a macro terminal from the pico BS, controlling a transmit power strength for the macro terminal based on the power control information, and instructing the macro terminal to control a transmit power to the controlled strength.
摘要:
An apparatus and method dynamically allocate resources in a communication system. An operation method of a base station (BS) dynamically allocates resources in a network associated with a first communication system and a second communication system. The method includes, in a start position of a subframe within a frame of the second communication system, generating information on a following subframe for the second communication system's subframe existing in the start position, in a frame structure that supports the coexistence of the first communication system and the second communication system. The method also includes inserting the generated information on the following subframe into a control signal transmitted through a predefined region within the second communication system's subframe existing in the start position and transmitting the control signal to a mobile station associated with the second communication system.
摘要:
A ranging apparatus in a communication system is provided. A terminal generates a ranging code for ranging with a base station, maps the ranging code to at least one sub-carrier so the ranging code is repeated in a time domain, generates a ranging signal so the mapped ranging code has a size of one symbol interval, and transmits the generated ranging signal to the base station. The base station receives a ranging signal, extracts a half signal of a valid symbol interval of the ranging signal, generates a valid symbol interval signal by repeating the extracted half signal of the valid symbol interval, restores a ranging signal using the valid symbol interval signal, and performs ranging using the ranging signal.
摘要:
A method and an apparatus for obtaining a small cell identifier in a wireless communication system having a hierarchical cell structure are provided. The method includes obtaining a small cell identifier of a terminal in a wireless communication system of a hierarchical cell structure, transmitting resource information allocated for a Random Access Channel (RACH) of a terminal to a small base station, receiving state information regarding the RACH of the terminal from the small base station, determining at least one small base station adjacent to the terminal using the state information regarding the RACH, and transmitting cell IDentifier (ID) information of the determined small base station to the terminal.
摘要:
An apparatus is configured to perform a method for selecting a cell to increase transmission capacity in a wireless communication system. A Mobile Station (MS) can select a cell in a heterogeneous network system. The MS can receive a loading indicator for each of a plurality of Base Stations (BS); measure signal strength information for each of the BSs; and select one of the BSs using the loading indicator and the signal strength information. Therefore, the transmission efficiency of the system can be increased.
摘要:
An apparatus and method for initial ranging in a wireless communication system including a heterogeneous network. An operation of a terminal includes selecting a serving cell considering a biased value of a base station applying range expansion. The operation also includes receiving ranging code classification information and threshold information associated with the serving cell. The operation further includes, if a channel quality with the serving cell is less than the threshold, selecting one a plurality of poor-expected-ranging codes indicated by the ranging code classification information, and performing initial ranging using the selected poor-expected-ranging code.