Patent application number | Description | Published |
20080293416 | METHOD FOR RELOCATING SRNS IN A MOBILE COMMUNICATION SYSTEM - A system and method for performing SRNS relocation in a communications system transmits radio resource information including a ciphering parameter from a source RNC to a target RNC, modifies the ciphering parameter to coincide with a deciphering parameter which a user terminal uses when out-of-sequence data is received, ciphers a data unit based on the modified ciphering parameter, and transmits the ciphered data unit from the target RNC to the user terminal. The method may be modified to operate in UM mode or AM mode and to transmit data over one of several radio bearers. In accordance with another embodiment, the system and method transmits radio resource information from a source RNC to a target RNC and then transmits a data unit from the target RNC to a user terminal. In this case, the data unit including a transmission sequence number which consecutively follows a transmission sequence number of a data unit last transmitted from the source RNC to the user terminal. In accordance with another embodiment, the system and method resets ciphering and state variables in a target RNC and then transmits a message instructing a user terminal to reset a deciphering and state variables to the same or similar values. All the embodiments are advantageous because they ensure successful communications will take place between the target RNC and user terminal after a serving radio network sub-system relocation procedure is performed. | 11-27-2008 |
20080298323 | PACKET TRANSMISSION SCHEDULING TECHNIQUE - A packet data transmission method of the HSDPA system includes collecting information on the quality of physical channels, a status of the MAC buffer, the priority level of data, the delay of data, and the like, determining the transmission order of data and the size of a data block to be transmitted based on the collected information, and transmitting the data block through the physical according to the order of transmissions. Since the HSDPA scheduler takes into account the delay of data, the quality of real-time services can be improved. | 12-04-2008 |
20090141715 | METHOD FOR TRANSMITTING PACKET DATA IN COMMUNICATION SYSTEM - A method and apparatus for a transmitter having a radio protocol with an upper layer and a lower layer therein used for management of full header packet transmission when transmitting data packets to a receiver are provided. If the upper layer receives from the lower layer, information of a successful transmission of a full header packet, the upper layer decides to stop sending any additional full header packet that contains the same full header as the previously successfully transmitted full header packet. | 06-04-2009 |
20100002585 | SYSTEM AND METHOD FOR AVOIDING STALL USING TIMER FOR HIGH-SPEED DOWNLINK PACKET ACCESS SYSTEM - At least one timer is used to prevent a stall condition. If a timer is not active, the timer is started for a data block that is correctly received. The data block has a sequence number higher than a sequence number of another data block that was first expected to be received. When the timer is stopped or expires, all correctly received data blocks among data blocks up to and including a data block having a sequence number that is immediately before the sequence number of the data block for which the timer was started is delivered to a higher layer. Further, all correctly received data blocks up to a first missing data block, including the data block for which the timer was started, is delivered to the higher layer. | 01-07-2010 |
20100020772 | Packet transmission scheduling technique - A packet data transmission method of the HSDPA system includes collecting information on the quality of physical channels, a status of the MAC buffer, the priority level of data, the delay of data, and the like, determining the transmission order of data and the size of a data block to be transmitted based on the collected information, and transmitting the data block through the physical layer according to the order of transmissions. Since the HSDPA scheduler takes into account the delay of data, the quality of real-time services can be improved. | 01-28-2010 |
20100074212 | Packet transmission scheduling technique - A packet data transmission method of the HSDPA system includes collecting information on the quality of physical channels, a status of the MAC buffer, the priority level of data, the delay of data, and the like, determining the transmission order of data and the size of a data block to be transmitted based on the collected information, and transmitting the data block through the physical layer according to the order of transmissions. Since the HSDPA scheduler takes into account the delay of data, the quality of real-time services can be improved. | 03-25-2010 |
20100074213 | Packet transmission scheduling technique - A packet data transmission method of the HSDPA system includes collecting information on the quality of physical channels, a status of the MAC buffer, the priority level of data, the delay of data, and the like, determining the transmission order of data and the size of a data block to be transmitted based on the collected information, and transmitting the data block through the physical layer according to the order of transmissions. Since the HSDPA scheduler takes into account the delay of data, the quality of real-time services can be improved. | 03-25-2010 |
20100074214 | Packet transmission scheduling technique - A packet data transmission method of the HSDPA system includes collecting information on the quality of physical channels, a status of the MAC buffer, the priority level of data, the delay of data, and the like, determining the transmission order of data and the size of a data block to be transmitted based on the collected information, and transmitting the data block through the physical layer according to the order of transmissions. Since the HSDPA scheduler takes into account the delay of data, the quality of real-time services can be improved. | 03-25-2010 |
20100135216 | Method for transmitting packet data in communication system - A method and apparatus for a transmitter having a radio protocol with an upper layer and a lower layer therein used for management of full header packet transmission when transmitting data packets to a receiver are provided. If the upper layer receives from the lower layer, information of a successful transmission of a full header packet, the upper layer decides to stop sending any additional full header packet that contains the same full header as the previously successfully transmitted full header packet. | 06-03-2010 |
20100178923 | Method For Relocating SRNS In A Mobile Communication System - A system and method for performing SRNS relocation in a communications system transmits radio resource information including a ciphering parameter from a source RNC to a target RNC, modifies the ciphering parameter to coincide with a deciphering parameter which a user terminal uses when out-of-sequence data is received, ciphers a data unit based on the modified ciphering parameter, and transmits the ciphered data unit from the target RNC to the user terminal. The method may be modified to operate in UM mode or AM mode and to transmit data over one of several radio bearers. In accordance with another embodiment, the system and method transmits radio resource information from a source RNC to a target RNC and then transmits a data unit from the target RNC to a user terminal. In this case, the data unit including a transmission sequence number which consecutively follows a transmission sequence number of a data unit last transmitted from the source RNC to the user terminal. In accordance with another embodiment, the system and method resets ciphering and state variables in a target RNC and then transmits a message instructing a user terminal to reset a deciphering and state variables to the same or similar values. All the embodiments are advantageous because they ensure successful communications will take place between the target RNC and user terminal after a serving radio network sub-system relocation procedure is performed. | 07-15-2010 |