Method and device for preserving mobility information in terminal state transition and effectively re-accessing in heterogeneous cell network in mobile communication system
First Claim
1. A method by a terminal in a wireless communication system, the method comprising:
- receiving, from a base station, a first parameter indicating a time duration for determining a mobility state of the terminal and a second parameter indicating a number of cell changes for determining the mobility state of the terminal;
identifying that there is mobility history information available in the terminal;
transmitting, to the base station, a first message to confirm a completion of a radio resource control (RRC) connection establishment, wherein;
the first message includes first information determined based on the identification and second information determined based on the first parameter and the second parameter,the first information indicates that the terminal has the mobility history information, andthe second information indicates the mobility state of the terminal determined in a predetermined time period before the terminal goes into an RRC connected state;
receiving, from the base station, a second message generated based on the first information, the second message requesting a report of the mobility history information; and
transmitting, to the base station, a third message including the mobility history information in response to the second message.
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Abstract
The present invention pertains to a method and device for preserving mobility information in terminal state transition and effectively re-accessing in a heterogeneous cell network in a mobile communication system. A method for estimating a mobility state of a terminal in a mobile communication system according to one embodiment of the present invention may comprise the steps of: receiving, by the terminal, system information from a serving cell during an idle state; calculating mobility state information by using the received system information; storing the mobility state information; and transmitting the mobility state information to a base station when the terminal is connected to the base station. According to one embodiment of the present invention, when an idle state of a terminal is changed to a connection state in a mobile communication system, a mobility state of the terminal can be more effectively estimated.
16 Citations
16 Claims
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1. A method by a terminal in a wireless communication system, the method comprising:
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receiving, from a base station, a first parameter indicating a time duration for determining a mobility state of the terminal and a second parameter indicating a number of cell changes for determining the mobility state of the terminal; identifying that there is mobility history information available in the terminal; transmitting, to the base station, a first message to confirm a completion of a radio resource control (RRC) connection establishment, wherein; the first message includes first information determined based on the identification and second information determined based on the first parameter and the second parameter, the first information indicates that the terminal has the mobility history information, and the second information indicates the mobility state of the terminal determined in a predetermined time period before the terminal goes into an RRC connected state; receiving, from the base station, a second message generated based on the first information, the second message requesting a report of the mobility history information; and transmitting, to the base station, a third message including the mobility history information in response to the second message. - View Dependent Claims (2, 3, 4)
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5. A method by a base station in a wireless communication system, the method comprising:
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transmitting, to a terminal, a first parameter indicating a time duration for determining a mobility state of the terminal and a second parameter indicating a number of cell changes for determining the mobility state of the terminal; receiving, from the terminal, a first message to confirm a completion of a radio resource control (RRC) connection establishment, wherein; the first message includes first information determined based on an identification that there is mobility history information available in the terminal and second information determined based on the first parameter and the second parameter, the first information indicates that the terminal has the mobility history information, and the second information indicates the mobility state of the terminal determined in a predetermined time period before the terminal goes into an RRC connected state; transmitting, to the terminal, a second message generated based on the first information, the second message requesting a report of the mobility history information; and receiving, from the terminal, a third message including the mobility history information in response to the second message. - View Dependent Claims (6, 7, 8)
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9. A terminal in a wireless communication system, the terminal comprising:
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a transceiver configured to transmit and receive a signal; and a processor configured to; receive, from a base station, a first parameter indicating a time duration for determining a mobility state of the terminal and a second parameter indicating a number of cell changes for determining the mobility state of the terminal, identify that there is mobility history information available in the terminal, transmit, to the base station, a first message to confirm a completion of a radio resource control (RRC) connection establishment, wherein; the first message includes first information determined based on the identification and second information determined based on the first parameter and the second parameter, the first information indicates that the terminal has the mobility history information, and the second information indicates the mobility state of the terminal determined in a predetermined time period before the terminal goes into an RRC connected state, receive, from the base station, a second message generated based on the first information, the second message requesting a report of the mobility history information, and transmit, to the base station, a third message including the mobility history information in response to the second message. - View Dependent Claims (10, 11, 12)
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13. A base station in a wireless communication system, the base station comprising:
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a transceiver configured to transmit and receive a signal; and a processor configured to; transmit, to a terminal, a first parameter indicating a time duration for determining a mobility state of the terminal and a second parameter indicating a number of cell changes for determining the mobility state of the terminal, receive, from the terminal, a first message to confirm a completion of a radio resource control (RRC) connection establishment, wherein; the first message includes first information determined based on an identification that there is mobility history information available in the terminal and second information determined based on the first parameter and the second parameter, and the first information indicates that the terminal has the mobility history information, and the second information indicates the mobility state of the terminal determined in a predetermined time period before the terminal goes into an RRC connected state, transmit, to the terminal, a second message generated based on the first information, the second message requesting a report of the mobility history information, and receive, from the terminal, a third message including the mobility history information in response to the second message. - View Dependent Claims (14, 15, 16)
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Specification