Inter-RAT handover to UTRAN with simultaneous PS and CS domain sevices
First Claim
1. A method for performing an inter system handover to Universal Terrestrial Radio Access Network (UTRAN) procedure, the method comprising:
- a wireless device establishing simultaneous circuit switched (CS) and packet switched (PS) services with a first radio access technology (RAT) system;
with the CS and PS services ongoing, the first RAT system transmitting a HANDOVER TO UTRAN COMMAND message to the wireless device to perform a handover to UTRAN procedure, the HANDOVER TO UTRAN COMMAND message excluding information used for handing over PS connections to the UTRAN so that the handover to UTRAN procedure hands over only CS connections;
the wireless device receiving the HANDOVER TO UTRAN COMMAND message;
the wireless device parsing the HANDOVER TO UTRAN COMMAND to determine what connections are handed over during the handover to UTRAN procedure; and
in response to the wireless device parsing the HANDOVER TO UTRAN COMMAND message and determining that only CS connections are handed over during the handover to UTRAN procedure, a radio resource control (RRC) layer within the wireless device informing an upper layer within the wireless device that no PS radio access bearers or no PS signaling connections are present.
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Accused Products
Abstract
A wireless device initially has simultaneous circuit switched (CS) and packet switched (PS) services with a non-UMTS network. With the CS and PS services ongoing, the non-UMTS network transmits a HANDOVER TO UTRAN COMMAND message to the wireless device to perform a handover to UTRAN procedure. The HANDOVER TO UTRAN COMMAND message excludes information used for handing over the PS signaling connections to the UTRAN so that only CS signaling connections are handed over. The wireless device receives and parses the HANDOVER TO UTRAN COMMAND message to determine what signaling connections are being handed over. Upon determining that only CS signaling connections are being handed over, a radio resource control (RRC) layer within the wireless device informs an upper layer within the wireless device that no PS radio access bearers or no PS signaling connections are present.
69 Citations
28 Claims
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1. A method for performing an inter system handover to Universal Terrestrial Radio Access Network (UTRAN) procedure, the method comprising:
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a wireless device establishing simultaneous circuit switched (CS) and packet switched (PS) services with a first radio access technology (RAT) system;
with the CS and PS services ongoing, the first RAT system transmitting a HANDOVER TO UTRAN COMMAND message to the wireless device to perform a handover to UTRAN procedure, the HANDOVER TO UTRAN COMMAND message excluding information used for handing over PS connections to the UTRAN so that the handover to UTRAN procedure hands over only CS connections;
the wireless device receiving the HANDOVER TO UTRAN COMMAND message;
the wireless device parsing the HANDOVER TO UTRAN COMMAND to determine what connections are handed over during the handover to UTRAN procedure; and
in response to the wireless device parsing the HANDOVER TO UTRAN COMMAND message and determining that only CS connections are handed over during the handover to UTRAN procedure, a radio resource control (RRC) layer within the wireless device informing an upper layer within the wireless device that no PS radio access bearers or no PS signaling connections are present. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A wireless device comprising a central processing unit (CPU) and memory, the memory containing program code executable by the CPU for performing the following steps:
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receiving a HANDOVER TO UTRAN COMMAND message from a first RAT system to perform a handover to Universal Terrestrial Radio Access Network (UTRAN) procedure;
parsing the HANDOVER TO UTRAN COMMAND to determine what connections are handed over during the handover to UTRAN procedure; and
in response to parsing the HANDOVER TO UTRAN COMMAND message and determining that only circuit switched (CS) connections are handed over during the handover to UTRAN procedure when both CS and packet switched (PS) services are ongoing in the first RAT system upon reception of the HANDOVER TO UTRAN COMMAND message, causing a radio resource control (RRC) layer within the wireless device to inform an upper layer within the wireless device that no PS radio access bearers or no PS signaling connections are present. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A wireless system comprising:
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a base station network comprising a Universal Mobile Telecommunications System (UMTS) network and a non-UMTS network; and
a user equipment (UE) capable of establishing simultaneous packet switched (PS) and circuit switched (CS) connections with the base station network;
wherein the base station network further comprises;
means for generating and transmitting a HANDOVER TO UTRAN COMMAND message to the UE when CS and PS services are being simultaneously supported by the UE for performing a handover to UTRAN procedure to hand over the UE to the UMTS network from the non-UMTS network, the HANDOVER TO UTRAN COMMAND message excluding information used for handing over PS connections to the UMTS network so that the handover procedure hands over only CS connections. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification