Method, apparatus, device and network system for adding secondary serving cell
地域：
Shenzhen, Guangdong
摘要
The present invention provides a method for adding a secondary serving cell, an apparatus, a device, and a network system. The method includes: communicating, with each other to acquire a unified serial number of a random access preamble code, a unified serial number of a PRACH mask code, and a unified cell radio network temporary identifier of a terminal; scrambling the serial number of the random access preamble code and the serial number of the PRACH mask code, and then sending the serial number of the random access preamble code and the serial number of the PRACH mask code to the terminal; and determining, a time advance command TAC according to a random access request message that carries the random access preamble code, and sending the TAC to the terminal.
說明書
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This application is a continuation of U.S. application Ser. No. 15/898,523, filed on Feb. 17, 2018, which is a continuation of U.S. application Ser. No. 14/611,428, filed on Feb. 2, 2015, which is a continuation of International Application No. PCT/CN2012/079421, filed on Jul. 31, 2012. All of the aforementioned patent applications are hereby incorporated by reference in their entireties.
The present invention relates to wireless communications technologies, and in particular, to a method for adding a secondary serving cell, an apparatus, a device, and a network system.
權(quán)利要求
What is claimed is:1. A method for adding a secondary serving cell, comprising:receiving, by a terminal, a random access resource allocation message sent by a primary base station, wherein the random access resource allocation message comprises a serial number of a random access preamble code and a serial number of a physical random access channel mask code; sending, by the terminal, a random access request message to a secondary base station by using a sending resource that is determined according to the serial number of the physical random access channel mask code, wherein the random access request message comprises the random access preamble code that is determined according to the serial number of the random access preamble code; receiving, by the terminal, a random access response message sent by the primary base station, wherein the random access response message comprises a time advance command (TAC) that is sent by the secondary base station to the primary base station and that is determined by the secondary base station according to the random access request message; and adjusting, by the terminal according to the TAC, a time advance (TA) of the terminal on a secondary serving cell corresponding to the secondary base station. 2. The method according to claim 1 , wherein before the receiving, by the terminal, the random access resource allocation message sent by the primary base station, the terminal further receives a cell radio network temporary identifier sent by the primary base station; and after the receiving, by the terminal, the random access resource allocation message sent by the primary base station, the terminal applies the cell radio network temporary identifier to descramble the random access resource allocation message. 3. A method for adding a secondary serving cell, comprising:sending, by a primary base station, a random access resource allocation message and a secondary serving cell addition request message to a terminal and a secondary base station, the random access resource allocation message and the secondary serving cell addition request message comprise a serial number of a random access preamble code and a serial number of a physical random access channel mask code; receiving, by the primary base station, a time advance command (TAC) transmission message sent by the secondary base station, wherein the TAC transmission message is sent to the primary base station after the secondary base station receives a random access request message that is sent by the terminal and carries the random access preamble code obtained according to the serial number of the random access preamble code, and the TAC transmission message comprises a TAC obtained by the secondary base station according to the random access request message; and sending, by the primary base station to the terminal, a random access response message that carries the TAC, so that the terminal adjusts, according to the TAC, a time advance (TA) of the terminal on a secondary serving cell corresponding to the secondary base station. 4. The method according to claim 3 , wherein before the sending, by the primary base station, the random access resource allocation message to the terminal, the primary base station further sends a cell radio network temporary identifier of the terminal to the terminal; and the primary base station uses the cell radio network temporary identifier of the terminal to scramble the random access resource allocation message and send the random access resource allocation message to the terminal. 5. The method according to claim 3 , wherein the TAC transmission message further comprises a first time at which the secondary base station receives the random access request message; andwherein the primary base station determines, correspondingly, according to the first time, a second time for sending the random access response message. 6. A method for adding a secondary serving cell, comprising:receiving, by a secondary base station, a secondary serving cell addition request message sent by a primary base station, wherein the secondary serving cell addition request message comprises a serial number of a random access preamble code and a serial number of a physical random access channel mask code; receiving, by the secondary base station according to the secondary serving cell addition request message, a random access request message that is sent by a terminal and carries the random access preamble code obtained according to the serial number of the random access preamble code; and obtaining, by the secondary base station, a time advance command (TAC) according to the random access request message, and sending, to the primary base station, a TAC transmission message that carries the TAC, so that the primary base station sends, to the terminal, a random access response message that carries the TAC so that the terminal adjusts, according to the TAC, a time advance (TA) of the terminal on a secondary serving cell corresponding to the secondary base station. 7. The method according to claim 6 , wherein the TAC transmission message further comprises a first time at which the secondary base station receives the random access request message, so that the primary base station determines, according to the first time, a second time for sending the random access response message.
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