A method for mapping a physical hybrid automatic repeat request indicator channel (PHICH) is described. The method for mapping a PHICH includes determining an index of a resource element group transmitting a repetitive pattern of the PHICH, according to a ratio of the number of available resource element groups in a symbol in which the PHICH is transmitted and the number of available resource element groups in a first or second OFDM symbol, and mapping the PHICH to the symbol according to the determined index. In transmitting the PHICH, since efficient mapping is performed considering available resource elements varying with OFDM symbols, repetition of the PHICH does not generate interference between neighbor cell IDs and performance is improved.

Method for mapping physical hybrid automatic repeat request indicator channel

The present invention relates to a wireless communication system, and more specifically to a method and an apparatus for transmitting and receiving downlink control information for a repeater. The method of a repeater receiving the downlink control information through an R-PDCCH from a base station according to one embodiment of the present invention comprises the steps of: determining a candidate location on which an R-PDCCH is transmitted at first and second slots of a downlink sub-frame; monitoring whether the R-PDCCH is transmitted on the determined candidate location; and receiving the downlink control information included in the R-PDCCH when the transmission of the R-PDCCH is monitored, wherein the R-PDCCH candidate location is set as a VRB set including VRBs of N number and a candidate location of one R-PDCCH for a high combination level can be composed of a combination of two adjacent candidate locations of the R-PDCCH candidate locations for a low combination level.

Method and apparatus for transmitting and receiving downlink control information for repeater

A method of, at a base station, transmitting spread signals in a wireless communication system includes spreading a plurality of signals using a spreading code with a predetermined spreading factor, multiplexing a plurality of spread signals to construct one or more spread signal groups, mapping the one or more spread signal groups to one or more specific Control Channel Elements (CCEs) set within one or more Orthogonal Frequency Division Multiplexing (OFDM) symbols, and transmitting the spread signals to User Equipments (UEs) through the one or more CCEs.

Method of transmitting signal in wireless communication system and apparatus thereof

A user equipment having a first mechanism to obtain a control region size of a sub-frame of a cell, the user equipment having a processor; and a communications subsystem, wherein the processor and communications subsystem are configured to cooperate to: determine having a first mechanism to obtain a control region size of a sub-frame of the first cell, second cell, or both, whether the user equipment is within an area of the second cell; and utilize, a second mechanism to obtain a control region size of a sub-frame of the second cell while the user equipment is within the area of the second cell.

Method and system for control format detection in heterogeneous cellular networks

In one exemplary embodiment, a method includes: dividing a plurality of control channel elements in at least one downlink subframe of a bundling window into a plurality of portions having a first portion and a second portion, where the first portion includes at least one control channel element that is mapped to resources and the second portion includes at least one control channel element that is not mapped to resources, where the bundling window has a plurality of downlink subframes; and sending a last downlink grant in a downlink subframe of the bundling window using at least one control channel element that is mapped to resources.

Physical upling control channel compression supporting ack/nack bundling

In a cellular system ( 100 ), transmissions are made ( 410 ) in subframes ( 310 ) which comprise subelements. The method is used for scheduling ( 415 ) first and second channels in a subframe, and comprises:
 dividing ( 420 ) the transmission resources for the first channel into a first set of resource groups, assigning ( 425 ) the resource groups of the first set to subelements in the subframe ( 310 ) in a predetermined fashion, assigning ( 430 ) a symbol value to all subelements ( 210 ) in the subframe ( 310 ) which have not been assigned a resource groups of the first set, dividing ( 435 ) the transmission resources for the second channel into a second set of resource groups, assigning ( 440 ) the resource groups of the second set to subelements in the subframe by means of said symbol values.

Scheduling in a cellular system

In a cellular system (100), transmissions are made (410) in subframes (310) which comprise subelements. The method is used for scheduling (415) first and second channels in a subframe, and comprises: • dividing (420) the transmission resources for the first channel into a first set of resource groups, • assigning (425) the resource groups of the first set to subelements in the subframe (310) in a predetermined fashion, • assigning (430) a symbol value to all subelements (210) in the subframe (310) which have not been assigned a resource groups of the first set, • dividing (435) the transmission resources for the second channel into a second set of resource groups, • assigning (440) the resource groups of the second set to subelements in the subframe by means of said symbol values.

Astely David

Papers

Scheduling in a cellular system

Improved scheduling in a cellular system

Using method and device in wireless cellular system