Method for reselecting cell
A cell reselection and moving state technology, applied in the communication, wireless communication, electrical components and other directions between multiple stations, can solve the problem that the UE cannot be indicated, the cell reselection parameters cannot be optimized, and the reliability of the UE movement process cannot be guaranteed. and other problems to achieve the effect of improving reliability
Inactive Publication Date: 2013-03-20
ZTE CORP
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[0003] However, according to the content of the current agreement, when the RNC requests the UE to move from the CELL_DCH state to the other three states in the radio bearer establishment message, the RNC cannot indicate whether the UE's mobility state is high-speed mobility or low-speed mobility, so that the UE cannot Optimize its cell reselection parameters based on its own mobility status, and thus cannot guarantee the reliability of the UE mobility process
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[0019] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0020] The cell reselection referred to here mainly refers to the process in which the UE determines the cell reselection parameters according to the UE mobility status indicated by the RNC in the radio bearer establishment message, such as figure 1 shown, including the following steps:
[0021] Step 110: When the RNC sends a radio bearer setup message requesting the UE to move from the CELL_DCH state to the CELL_FACH state, the RNC judges whether the UE's mobility status is high-speed mobility or low-speed mobility, and uses this information as one of the information elements of the radio bearer setup message - sent to UE;
[0022] Preferably, the RNC can judge the mobile state of the UE according to the number of times the UE performs cell switching within a period of time. For example, when the number of times th...
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The invention discloses a method for reselecting a cell, and relates to the field of wireless communication. The method comprises the following steps: in a process that an RNC requests UE to create a radio bearer, when the RNC requests the UE to immigrate to other connection states from a CELL-DCH state, carrying an indicating cell used for indicating a moving state of the UE in a radio bearer creating message; and after the UE receives the radio bearer creating message, and when the UE immigrates to other connection states from the CELL-DCH state according to the message, acquiring the indicating cell from the message, and determining cell reselecting parameters according to the indicating cell. Through the technical scheme in the invention, the cell reselecting parameters can be optimized according to the moving state indicated by the RNC when the UE immigrates to the other three connection states from the CELL-DCH state so as to improve the reliability of access in the moving process of the UE.
Description
technical field [0001] The invention relates to the field of wireless communication, in particular to a cell reselection method. Background technique [0002] The 25.331 protocol of the 3rd Generation Partnership Project (referred to as 3GPP) is a wireless resource between a radio network controller (Radio Network Controller, abbreviated as RNC) and a user equipment (referred to as UE). Control (Radio Resource Control, referred to as RRC) layer protocol, which divides UE into idle mode and connected mode, and connected mode is further divided into four RRC states: cell dedicated channel CELL_DCH (Cell Dedicated Channel) state, cell forward Access channel CELL_FACH (CellForward Access Channel) status, cell paging channel CELL_PCH (Cell PagingChannel) status and Universal Terrestrial Radio Access Network UTRAN Registration Area (Universal Terrestrial Radio Access Network Registration Area) paging channel URA_PCH (UTRANRegistration Area Paging Channel) status . When the UE pe...
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IPC IPC(8): H04W36/00H04B7/26
Inventor 曾玲玲
Owner ZTE CORP