Abstract: In order to enhance data link security, the present invention provides a method of calculating a start value for security for a user equipment, or UE, in a wireless communications system. The method includes selecting ciphering sequence numbers, denoted by COUNT-Cs, and integrity sequence numbers, denoted by COUNT-Is, of radio bearers and signaling radio bearers using the most recently configured ciphering key and integrity key, determining a maximum COUNT value of the selected COUNT-Cs and COUNT-Is and calculating the START value when twenty most significant bits of the maximum COUNT value reach a first value resulting from subtracting a predefined value from a maximum value. Preferably, the maximum value is 1048575, whereas the predefined value is 2 or any other positive integer.

Abstract: A method for enhancing paging efficiency in a wireless communications system includes a user equipment of the wireless communications system receiving a service provided by a Multimedia Broadcast Multicast Service dedicated cell, and a network of the wireless communications system outputting a paging message for paging the user equipment in at least one cell of a tracking area determined according to a result of a tracking area update procedure of the user equipment when the network receives a terminating call corresponding to the user equipment.

Abstract: A method for performing radio bearer mapping in an user equipment of a wireless communications system includes setting a plurality of multiplexing options of a frequency division duplex radio bearer, called FDD RB hereinafter, when the user equipment operates in a Cell Dedicated Channel state, each of the plurality of multiplexing options corresponding to a multiplexing mode, determining whether an RB of the user equipment has one of the plurality of multiplexing options, and using a multiplexing mode corresponding to a multiplexing option of the plurality of multiplexing options for performing RB mapping when the RB has the multiplexing option.

Abstract: To provide services having different QoS requirements with different timers or parameters for detecting radio link failure in a wireless communications system, detecting the radio link failure includes utilizing at least one timer of a packet switching domain of a communications device to detect the radio link failure, and utilizing at least one parameter of the packet switching domain of the communications device to detect the radio link failure.

Abstract: A method of handling radio link failure for a packet switching domain in a wireless communications system includes a user equipment utilizing at least one timer, at least one parameter and at least one variable, or at least one timer at least one parameter and at least one variable, for performing a re-establishment procedure when a radio connection is lost.

Abstract: To provide load balance, low interruption, reduced amount of PDP context (or similar context) creation request messages, and flexibility in UMTS and HSPA evolution (HSPA+) wireless communications systems, a method of distributing a gateway support node in the UMTS or HSPA+ wireless communications system includes utilizing an entity to perform a first function for collecting information about statistics, characteristics, and status of a GGSN-functional-like entity (GFL) and connections related to the GFL, and utilizing the entity to perform a second function for processing the GFL inventory according to the information collected by the first network node.

Abstract: Handling radio link failure efficiently in a packet switching domain of a wireless communications system includes a user equipment performing an action when an indication is received from a network entity for an action rule or action rules and a trigger or triggers to enter a radio state, and the user equipment entering the radio state.

Abstract: To provide load balance, low interruption, reduced amount of PDP context (or similar context) creation request messages, and flexibility in an LTE/SAE wireless communications system, a method of distributing a gateway support node in the LTE/SAE wireless communications system includes utilizing an entity to perform a first function for collecting information about statistics, characteristics, and status of a GGSN-functional-like entity (GFL) and connections related to the GFL, and utilizing the entity to perform a second function for processing the GFL inventory according to the information collected by the first network node.

Abstract: In order to prevent a preferred frequency providing Multimedia Broadcast Multicast Service, called MBMS hereinafter, services, from getting congestion, the present invention provides a method of selecting an operating frequency for a user equipment, called UE hereinafter, in a wireless communications system. The method includes switching the operating frequency from a first frequency to a second frequency when the UE activates to receive a MBMS service of a service group; and switching the operating frequency from the second frequency to the first frequency when the UE determines not to receive any MBMS services provided on the second frequency.

Abstract: A method for setting a serving grant value in a user end of a wireless communications system includes steps of determining a maximum serving grant value when a non-serving relative grant message is received, and updating the serving grant value according to the maximum serving grant value.

Abstract: In order to prevent a user equipment, called UE hereinafter, from wasting unnecessary power, a method of reporting MBMS service information for the UE in a wireless communications system is provided. The method includes canceling reporting an MBMS message if there is no MBMS selected service in the UE upon entering a dedicated radio resource control state. Preferably, the MBMS message is an MBMS MODIFICATION REQUEST message.

Abstract: In order to prevent traffic volume measurement errors, especially variance measurement errors, the present invention provides a method of measuring variance of a data payload in a wireless communications system. The method includes the following steps. Plural variance reference values are predetermined. A variance measurement result related to data payload is reported. If the variance measurement result is greater than the plural variance reference values, the variance measurement result is rounded downwards to the maximum variance reference value of the plural variance reference values. Preferably, the plural variance reference values have a maximum value of 16 K and a minimum value of 0, where K is 1024. The plural variance reference values other than the minimum value form a geometric sequence.

Abstract: When the system receives a request to switch for using a smaller TBS size, instead of discarding the unacknowledged MAC-hs PDUs, this invention will pick up RLC UM PDUs or RLC AM PDUs or both of them from the unacknowledged MAC-hs PDUs affected by the size change request and reload them into the new PDU. Meantime, this invention will select RLC UM PDUs over RLC AM PDUs to load into the new PDU if the unacknowledged MAC-hs PDU contains both of them. Therefore, this invention reduces the risk of loss of synchronization for UM RLC because the discarding of unacknowledged MAC-hs PDUs according to the prior art.

Abstract: Instead of using a fixed size window, the invention will calculate the window size based on the receiver's capacities and configured system parameters. Moreover, this invention modifies operations regarding how to shift the transmission window at the transmitter and the receiving window at the receiver and how to deliver the received data blocks in-sequence by the receiver, so that it fixes problems of the prior art.

Abstract: The present invention provides a method for specifying actions that a receiver takes upon receiving an AM or UM PDU with an error indication. Currently, for RLC acknowledged mode (AM) and unacknowledged mode (UM), upon receiving an AM or UM PDU with an error indication, actions that the receiver takes are not specified. Inappropriate actions that the receiver takes can cause serious problems. For example, unnecessary reset procedures are initiated, unnecessary retransmissions are made, data is lost, or synchronization between the sender and receiver can be lost. In an embodiment of the present invention, for RLC AM, upon receiving an AM PDU with an error indication, the receiver discards this PDU. In another embodiment of the present invention, for RLC UM, upon receiving an UM PDU with an error indication, the receiver discards this PDU. In another embodiment, MAC discards a MAC SDU that is to be delivered to an AM or a UM RLC entity, if an error indication for this SDU has been received from the lower layer.

Abstract: 33When an RRC procedure is combined with an SRNS Relocation procedure, a PDCP synchronization procedure is performed only if a next expected UL/DL Receive PDCP sequence number invalidity event is detected during the SRNS Relocation procedure. If no such invalidity event is detected, then no PDCP sequence number synchronization procedure is performed. If the RRC procedure is not executed in combination with the SRNS Relocation procedure, then the PDCP sequence number synchronization procedure is performed only if: (1) The RRC procedure causes the RLC entity that is used by the PDCP entity to be re-established; or, (2) The RRC procedure causes the header compression protocol used by the PDCP entity to be changed.

Abstract: This invention provides solutions to resolve the potential security unsynchronizing problem when upper layers issue a suspend command to the RLC entity while a TFC selection exchange process has been initialised. Three solutions of this invention, can be used either in UM or in AM environment, in which the RLC entity defines a safe range factor and add it to the upper-layers-passed parameter N of the prior art to calculate a new suspend sequence number for the suspended RLC entity. During the suspension, the RLC entity will continuously pass the scheduled RLC PDUs to lower layers as long as the SN of scheduled RLC PDU is less than the new suspend sequence number. One solution of this invention is more suitable to be implemented in UM than in AM. In this solution, upper layers decide and pass to the RLC entity a suitable parameter N having a more tolerant safety range than the prior art does.

Abstract: A UTRAN sends a Radio Bearer Setup message to a UE, which indicates that SRNS relocation is to be performed and that a new RB is to be established in a first domain. The UE receives the Radio Bearer Setup message and assigns a first START value to a START_VALUE_TO_TRANSMIT variable according to the HFNs of all established RBs in the first domain. The UE the generates a START list containing entries corresponding all domains, including the first domain. The UE fills the entries with corresponding START values, synchronizing the entry corresponding to the first domain to hold a value that is identical to the value of the START_VALUE_TO_TRANMIT variable. The UE then composes a reply message that includes the START list, and sends the reply message to the UTRAN. The UE utilizes the START_VALUE_TO_TRANSMIT variable to set an HFN of the new RB. In a second embodiment, the response message includes both the START list and the START_VALUE_TO_TRANMIT variable. The START list is applied to all RBs but the new RB.

Abstract: A wireless device first successfully completes an Inter-RAT procedure, which is either an Inter-RAT handover, Inter-RAT cell reselection or Inter-RAT cell change order from UTRAN procedure. The wireless device then determines if a USIM is present. If the USIM is present, the wireless device determines if a new security key set was received and unused for ciphering and integrity functions during a current RRC connection. If a new key set was present and unused, the wireless device stores a value of zero into the USIM as a security START value for the CN domain associated with the RRC connection.

Abstract: A user equipment (UE) transmits a first START value to a serving radio network controller (RNC), and utilizes the first START value as a most-recently transmitted START value. A serving radio network subsystem (SRNS) relocation procedure is then initiated between the UE, the serving RNC and a target RNC. In response to the SRNS relocation procedure, the serving RNC transmits a SRNS relocation information container to the target RNC. The SRNS relocation information container includes the START value of each CN domain and the Latest configured core network (CN) domain. The target RNC utilizes the START value of the Latest configured CN domain to initialize the hyper-frame numbers (HFNs) of radio bearer RB2. The UE re-establishes RB2 and utilizes the first START value to initialize the HFNs of RB2. The UE then transmits a response message to the target RNC on RB2.