Method for location area update in multi-rat environment and method for transmitting/receiving paging information
First Claim
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1. A method for transmitting a tracking area update (TAU) by a user equipment (UE), the method comprising:
- receiving system information (SI) through a cellular interface from a multi-radio access technology radio entity (multi-RAT RE),wherein the SI includes a tracking area code (TAC) of the multi-RAT RE, andwherein the TAU is not performed through the cellular interface when a TAC of the UE is different from the TAC of the multi-RAT RE;
receiving wireless local area network (WLAN) type information from an access point (AP);
determining one of a first to third WLAN type on which the UE can perform the TAU based on the WLAN type information,wherein the WLAN type information for the first WLAN type includes information identifying whether the AP is physically collocated with the multi-RAT RE, wherein the WLAN type information for the second WLAN type includes information identifying whether the AP is physically connected to the multi-RAT RE, and wherein the WLAN type information for the third WLAN type includes information identifying whether the AP is physically collocated with the multi-RAT RE and physically connected to the multi-RAT RE; and
performing the TAU through a WLAN interface based on the determined WLAN type.
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Abstract
The present invention relates to a method for updating a TAC in a multi-RAT environment and a method for transmitting/receiving paging information. A terminal, which is capable of establishing a radio connection through a first radio interface by a first radio protocol and a radio connection through a second radio interface by a second radio protocol, may determine the best radio interface on the basis of predetermined conditions, perform a TA update through the best radio connection interface, and transmit/receive paging information through the best radio connection interface.
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Citations
9 Claims
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1. A method for transmitting a tracking area update (TAU) by a user equipment (UE), the method comprising:
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receiving system information (SI) through a cellular interface from a multi-radio access technology radio entity (multi-RAT RE), wherein the SI includes a tracking area code (TAC) of the multi-RAT RE, and wherein the TAU is not performed through the cellular interface when a TAC of the UE is different from the TAC of the multi-RAT RE; receiving wireless local area network (WLAN) type information from an access point (AP); determining one of a first to third WLAN type on which the UE can perform the TAU based on the WLAN type information, wherein the WLAN type information for the first WLAN type includes information identifying whether the AP is physically collocated with the multi-RAT RE, wherein the WLAN type information for the second WLAN type includes information identifying whether the AP is physically connected to the multi-RAT RE, and wherein the WLAN type information for the third WLAN type includes information identifying whether the AP is physically collocated with the multi-RAT RE and physically connected to the multi-RAT RE; and performing the TAU through a WLAN interface based on the determined WLAN type. - View Dependent Claims (2, 3, 4, 5)
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6. A user equipment (UE) for transmitting a tracking area update (TAU), the UE comprising:
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a transmitter and a receiver; and a processor, operatively connected to the transmitter and the receiver, wherein the processor is configured to; receive system information (SI) through a cellular interface from a multi-radio access technology radio entity (multi-RAT RE), wherein the SI includes a tracking area code (TAC) of the multi-RAT RE, and wherein the TAU is not performed through the cellular interface when a TAC of the UE is different from the TAC of the multi-RAT RE; receive wireless local area network (WLAN) type information from an access point (AP); determine one of a first to third WLAN type on which the UE can perform the TAU based on the WLAN type information, wherein the WLAN type information for the first WLAN type includes information identifying whether the AP is physically collocated with the multi-RAT RE, wherein the WLAN type information for the second WLAN type includes information identifying whether the AP is physically connected to the multi-RAT RE, and wherein the WLAN type information for the third WLAN type includes information identifying whether the AP is physically collocated with the multi-RAT RE and physically connected to the multi-RAT RE; and perform the TAU through a WLAN interface based on the determined WLAN type. - View Dependent Claims (7, 8, 9)
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Specification