WO2015017977A1 - Procédé, dispositif et système de transfert intercellulaire de réseau umts-lte - Google Patents

Procédé, dispositif et système de transfert intercellulaire de réseau umts-lte Download PDF

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Publication number
WO2015017977A1
WO2015017977A1 PCT/CN2013/080903 CN2013080903W WO2015017977A1 WO 2015017977 A1 WO2015017977 A1 WO 2015017977A1 CN 2013080903 W CN2013080903 W CN 2013080903W WO 2015017977 A1 WO2015017977 A1 WO 2015017977A1
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Prior art keywords
handover
cell
time
umts
target
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PCT/CN2013/080903
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English (en)
Chinese (zh)
Inventor
宋平
张欢
邢平平
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华为技术有限公司
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Priority to CN201380001574.4A priority Critical patent/CN104521252B/zh
Priority to PCT/CN2013/080903 priority patent/WO2015017977A1/fr
Publication of WO2015017977A1 publication Critical patent/WO2015017977A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0077—Transmission or use of information for re-establishing the radio link of access information of target access point

Definitions

  • the present invention relates to the field of mobile communication networks, and in particular, to a network switching method, device and system for Universal Mobile Telecommunications Service (UMTS) to Long Term Evolution (LTE). Background technique
  • UMTS Universal Mobile Telecommunications Service
  • LTE Long Term Evolution
  • Multi-standard network evolution brings operators deployment and management difficulties, such as from the perspective of 3GPP, from Global System for Mobile (GSM) to Wideband Code Division Multiple Access (Wideband Code) Division Multiple Access (WCDMA), and then to Long Term Evolution (LTE), an operator will operate three networks at the same time, how to manage and maintain, how the network and network interact with each other, and what kind of service resides. On which network, various problems remain to be solved.
  • GSM Global System for Mobile
  • WCDMA Wideband Code Division Multiple Access
  • LTE Long Term Evolution
  • the specific implementation means that the access network nodes of multiple standards are grouped together, that is, the multi-mode base station, the eNB (Evolved NodeB) and the NB, and the Base Transceiver Station (BTS) are co-located.
  • the eNB Evolved NodeB
  • the NB Base Transceiver Station
  • UE User Equipment
  • RNC source radio network controller
  • the source RNC sends a handover request to the target eNB through the UMTS and the LTE core network node; (3) after receiving the handover request, the target eNB performs related resource preparation and passes the LTE and UMTS cores.
  • the heart network node sends a handover request response message to the source RNC;
  • the source RNC sends a handover command to the UE
  • the UE initiates a random access to the target LTE cell according to the resource allocation in the handover command.
  • the UE After the UE successfully accesses the target LTE cell, the UE sends a handover complete message to the target eNB, and then updates the core network route.
  • the uplink signals of different UEs arrive at the eNodeB
  • time alignment is required to ensure the orthogonality of the uplink signals between the UEs, thereby helping to eliminate interference in the cell.
  • the signal is delayed in spatial transmission. If the UE moves in the direction away from the base station during the call, the signal sent from the base station will arrive at the UE "later and later", and at the same time, the signal of the UE will "go.” The later the "reaching base station", the delay is too long, and the signal received by the base station on the time slot overlaps with the time slot in which the base station receives another UE signal, causing inter-symbol interference.
  • the time alignment of the uplink transmission in the LTE system is implemented by applying the Timing Advance (TA) on the transmitting side of the UE.
  • the main function of the TA is to eliminate different transmission delays between the UEs. Adjust the transmission time according to the TA.
  • the current UMTS to LTE (U-L) handover delay is mainly obtained from the Radom Access Channel (RACH) process in the LTE after receiving the handover command from the UE.
  • RACH Radom Access Channel
  • the RACH process is mainly for obtaining time. Timing advance (TA) and subsequent uplink transmission of the resource for the handover completion message.
  • TA Timing advance
  • the foregoing RACH procedure may increase the handover interruption delay of the U-L to some extent, and the UE uses the dedicated Preamble code resource due to the RACH procedure in the handover process.
  • the target eNB also needs to allocate a dedicated Preamble code resource for the handover process of the UE, and occupies a certain dedicated code resource. Summary of the invention
  • an embodiment of the present invention provides a UMTS-to-LTE network handover method, device, and system, which are used to shorten the UMTS-to-LTE handover interruption delay and save LTE-specific code resources in the UMTS-to-LTE network handover process.
  • an embodiment of the present invention provides a network switching method for a universal mobile communication service UMTS to a long-term evolution LTE, including:
  • the UMTS medium source service radio network controller RNC sends a handover request message to the target base station eNB after making a handover decision to the target LTE cell according to the measurement report of the co-located LTE neighboring cell sent by the user equipment UE;
  • the source RNC receives a handover request response message that is returned by the target eNB, where the handover request response message carries uplink resource information that is allocated by the target eNB for the UE to send a handover complete message;
  • the source RNC sends a handover command to the UE, instructing the UE to complete the uplink resource information carried in the handover command, the indication of the random access channel RACH process without the target cell, and the time advance TA information.
  • the TA information is obtained by the source RNC by:
  • the source RNC converts the transmission delay of the UE to the base station NB acquired by the RACH procedure when the UE is in the UMTS cell to the value of the TA.
  • the UE to NB transmission delay in the UMTS cell is a transmission delay Propagation Delay of the source RNC side. Parameter or extended transmission delay Extended Propagation Delay parameter.
  • the indication that the handover command carries the RACH process without going to the target cell is a No RACH indication or Same station indication.
  • the TA information is obtained by the source RNC by:
  • the source RNC sends a different system measurement control Measurement Control message to the UE when it is in the UMTS cell and is in the dedicated transport channel DCH state, where the measurement control message includes a user positioning measurement UE positioning measurement item;
  • the source RNC receives the inter-system measurement report sent by the UE, and obtains a value of the UE Rx-Tx time difference and a value of a round trip time or an extended round trip time from the different system measurement report;
  • the source RNC calculates the value of the transmission delay of the UE to the NB when the UE is in the UMTS cell according to the following formula, and converts the calculated value of the transmission delay into a value of TA:
  • the UE Rx-Tx time difference is a time difference between a UE downlink dedicated physical channel frame reception time and an uplink dedicated physical control channel/uplink dedicated physical data channel frame transmission time;
  • the round trip time or the extended round trip time is a time difference between the time when the NB receives the uplink dedicated physical control channel frame time and the NB downlink dedicated physical channel frame transmission time.
  • the source RNC sends the inter-system measurement control message to the UE, including:
  • the source RNC configures an additional measurement item in the measurement control message, where the additional measurement item includes the UE positioning measurement item; the source RNC sends the different system measurement control message to the UE.
  • an embodiment of the present invention provides a network switching method for a universal mobile communication service UMTS to a long-term evolution LTE, including:
  • the user equipment UE sends a measurement report including the co-located LTE neighboring cell to the source radio network controller RNC in the UMTS cell;
  • the UE receives the handover command sent by the source RNC, where the handover command carries the uplink resource information allocated by the target base station eNB for the UE to send the handover complete message, and does not need to go to the target cell to perform the random access channel RACH.
  • the indication of the process and the timing advance TA information the UE completes the handover access from the source UMTS cell to the target LTE cell according to the indication of the handover command.
  • the TA information is obtained by the source RNC by:
  • the source RNC converts the transmission delay of the UE to the NB acquired by the RACH procedure when the UE is in the UMTS cell to the value of the TA.
  • the UE to NB transmission delay is a transmission delay Propagation Delay parameter of the source RNC side or Extended propagation delay Extended Propagation Delay parameter.
  • the method further includes:
  • the UE receives the measurement control Measurement Control message sent by the source RNC, and the boosting force of the Measurement Control message, when the UE is in the UMTS cell and is in the DCH state of the dedicated transport channel.
  • the measurement additional measurement item includes a user positioning measurement UE positioning measurement item; the UE performs the inter-system measurement according to the Measurement Control message, and includes the UE Rx-Tx time difference and round to the source RNC. Different system measurements of trip time or extended round trip time are reported;
  • the value of the TA in the handover command received by the UE is obtained by:
  • the source RNC calculates the value of the transmission delay of the UE to the NB when the UE is in the UMTS cell according to the following formula, and converts the calculated value of the transmission delay into a TA value:
  • the UE Rx-Tx time difference characterizes a time difference between a UE downlink dedicated physical channel frame reception time and an uplink dedicated physical control channel/uplink dedicated physical data channel frame transmission time;
  • the round trip time or the extended round trip time characterizes the time difference between the NB receiving the uplink dedicated physical control channel frame and the NB transmitting the downlink dedicated physical channel frame.
  • the indication that the handover command carries the RACH process without going to the target cell is a No RACH indication or the same Station instructions.
  • an embodiment of the present invention provides a radio network controller RNC, which is located in a universal mobile communication service UMTS network, and includes: a handover decision module, configured to receive a measurement report of a co-located long-term evolution LTE neighboring cell sent by a user equipment UE under its jurisdiction, and make a handover decision of the UE to a target LTE cell;
  • RNC radio network controller
  • a sending module configured to send a handover request message to the target base station eNB after the handover decision of the UE to the target LTE cell is performed; and send a handover to the UE after the receiving module receives the handover request response message returned by the target eNB And instructing the UE to complete the handover from the source UMTS cell to the target LTE cell according to the uplink resource information carried in the handover command, the indication of the random access channel RACH procedure without the target cell, and the timing advance TA information.
  • a receiving module configured to receive a handover request response message that is returned by the target eNB, where the handover request response message carries uplink resource information that is sent by the target eNB to the UE to send a handover complete message.
  • the RNC further includes:
  • the TA information obtaining module is configured to convert the transmission delay of the UE to the base station NB obtained by the RACH procedure when the UE is in the UMTS cell, into a value of the TA.
  • the UE-to-NB transmission delay in the UMTS cell is the transmission delay Propagation Delay parameter on the RNC side. Or extend the Extended Propagation Delay parameter.
  • the indication that the handover command carries the RACH process without going to the target cell is a No RACH indication or Same station indication.
  • the RNC further includes: a TA information acquiring module;
  • the sending module is further configured to: when the UE is in the UMTS cell and in the dedicated transport channel DCH state, send a different system measurement control measurement control message to the UE, where the measurement control message includes a user positioning measurement UE positioning measurement item;
  • the receiving module is further configured to receive a different system measurement report sent by the UE;
  • the TA information obtaining module is configured to obtain a UE Rx-Tx time from the different system measurement report The value of the difference and the value of the round trip time or the extended round trip time; and calculating the value of the UE to NB transmission delay when the UE is in the UMTS cell according to the following formula, and calculating the calculated value of the transmission delay Value converted to TA:
  • UE-to-NB transmission delay in the UMTS cell (round trip time or extended round trip time - UE Rx-Tx time difference) /2;
  • the UE Rx-Tx time difference characterizes the UE The time difference between the downlink dedicated physical channel frame reception time and the uplink dedicated physical control channel/uplink dedicated physical data channel frame transmission time; the round trip time or extended round trip time indicates that the NB receives the uplink dedicated physical control channel frame time and the NB downlink dedicated The time difference of the physical channel frame transmission time.
  • the sending module is configured to configure an added measurement additional measurement item in the measurement control message, where the additional measurement item is And including the UE positioning measurement item; sending the different system measurement control message to the UE.
  • an embodiment of the present invention provides a radio network controller RNC, which is located in a universal mobile communication service UMTS network, and includes:
  • a processor configured to receive, by the user equipment UE that is in its jurisdiction, a measurement report that includes a co-located long-term evolution LTE neighboring cell, and make a handover decision of the UE to the target LTE cell;
  • a transceiver configured to: after the processor makes a handover decision of the UE to the target LTE cell, send a handover request message to the target base station eNB; receive a handover request response message returned by the target eNB, where the handover request response message carries And the uplink resource information that is sent by the target eNB to the UE to send a handover complete message; and after receiving the handover request response message returned by the target eNB, sending a handover command to the UE, instructing the UE to follow the handover command
  • the uplink resource information carried in the source, the indication of the random access channel RACH procedure without the target cell, and the timing advance TA information are used to complete the handover access from the source UMTS cell to the target LTE cell.
  • the fifth aspect, the embodiment of the present invention provides a user equipment UE, including:
  • a different system measurement module configured to perform heterogeneous system measurement on the same station LTE neighboring area in the universal mobile communication service UMTS cell, and send the different system measurement report to the source radio network controller RNC;
  • a receiving module configured to receive a handover command sent by the source RNC, where the handover command carries The uplink resource information allocated by the target base station eNB for the UE to send the handover complete message, the indication that the target cell does not need to perform the random access channel RACH procedure, and the timing advance TA information;
  • a handover module configured to complete handover access from the source UMTS cell to the target LTE cell according to the indication of the handover command.
  • the receiving module is further configured to: when the UE is in a UMTS cell and in a DCH state of a dedicated transport channel, receive a measurement control measurement control delivered by the source RNC a message; a measurement of the boosting port of the Measurement Control message includes a user positioning measurement UE positioning measurement item;
  • the different system measurement module is further configured to perform an inter-system measurement according to the Measurement Control message, and include, on the source RNC, a different system including a UE Rx-Tx time difference and a round trip time or an extended round trip time.
  • the UE Rx-Tx time difference characterizes the time difference between the UE downlink dedicated physical channel frame reception time and the uplink dedicated physical control channel/uplink dedicated physical data channel frame transmission time; the round trip time or extended round trip time
  • the time difference between the NB receiving the uplink dedicated physical control channel frame time and the NB downlink dedicated physical channel frame sending time is characterized.
  • the indication that the handover command carries the RACH process without going to the target cell is a No RACH indication or a co-site indication .
  • the sixth aspect of the present invention provides a user equipment UE, including:
  • a processor configured to perform an inter-system measurement on a co-located LTE neighboring cell in a universal mobile communication service UMTS cell, and send an inter-system measurement to the source radio network controller RNC; and complete the indication according to the handover command Handover access from the source UMTS cell to the target LTE cell;
  • the embodiment of the present invention provides a network switching system of a universal mobile communication service UMTS to a long-term evolution LTE, including:
  • the radio network controller RNC is located in the UMTS, and is configured to send a handover request message to the target base station eNB according to the handover report including the measurement report of the co-located LTE neighboring cell sent by the user equipment UE, to the target base station eNB; a handover request response message, where the handover request response message carries uplink resource information that is sent by the target eNB to the UE to send a handover complete message; and sends a handover command to the UE, where the handover command carries The uplink resource information, the indication that the random access channel RACH process is not required to go to the target cell, and the timing advance TA information;
  • a UE configured to send a measurement report including a co-located LTE neighboring cell to the RNC, and receive a handover command sent by the source RNC, and complete a handover from a source UMTS cell to a target LTE cell according to the indication of the handover command. Access.
  • the handover command sent by the source RNC to the UE includes an indication that the RACH process is not required to go to the target cell, and Since the uplink resource of the handover completion message is pre-allocated by the UE, and the value of the TA is determined by the source RNC in advance, the three contents are carried in the handover command and sent to the UE, and the UE may receive the handover command after receiving the handover command.
  • the access to the target cell is performed directly, and the RACH process does not need to be performed in the target cell, which shortens the interruption delay caused by the RACH process, and also saves related resources of the RACH.
  • 1 is a schematic diagram of a network switching process of UMTS to LTE in the prior art
  • 2 is a flowchart of a UMTS to LTE network handover method on a source RNC side according to an embodiment of the present invention
  • 3 is a relationship diagram of a round trip time and a UE Rx-Tx time difference according to an embodiment of the present invention
  • FIG. 4 is a flowchart of a UE handover method of a UMTS to LTE network handover method according to an embodiment of the present invention
  • Figure 5 is a detailed flow chart of the first embodiment
  • Figure 6 is a detailed flow chart of the second embodiment.
  • FIG. 7 is a schematic diagram of a first structure of a radio network controller according to an embodiment of the present invention
  • FIG. 8 is a schematic diagram of a second structure of a radio network controller according to an embodiment of the present invention
  • FIG. 10 is a schematic diagram of a first structure of a user equipment according to an embodiment of the present invention
  • FIG. 11 is a schematic diagram of a second structure of a user equipment according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of a network switching system of UMTS to LTE according to an embodiment of the present invention. detailed description
  • a UMTS-to-LTE network handover method is provided in the embodiment of the present invention.
  • the process of the service RNC (hereinafter referred to as the source RNC) of the UE in the UMTS is as shown in FIG. 2, and includes the following steps:
  • the source service RNC in the UMTS is based on the measurement report sent by the UE and including the co-located LTE neighboring cell. After making a handover decision to the target LTE cell, sending a handover request message to the target eNB;
  • the source RNC receives a handover request response message that is returned by the target eNB, where the handover request response message carries uplink resource information that is allocated by the target eNB for the UE to send a handover complete message.
  • the source RNC sends a handover command to the UE, and instructs the UE to complete the handover from UMTS to LTE according to the uplink resource information carried in the handover command, the indication of the RACH procedure without the target cell, and the TA information.
  • the UE After receiving the handover command sent by the source RNC, the UE may directly access the target cell by using the related information carried in the handover command, and obtain the uplink resource information and the TA information without performing the RACH process.
  • the RACH process performed by the UE in the LTE after receiving the handover command is omitted, the network handover interruption delay of the UMTS to LTE is shortened, and the dedicated Preamble code resource is saved.
  • the uplink resource used by the UE to subsequently send the handover complete message may be allocated by the target eNB in advance and notified to the UE by the source RNC.
  • the source RNC may adopt the following two manners. To get:
  • the source RNC converts the propagation delay (PD) of the UE to the NB when the UE is in the UMTS cell to obtain the value of the TA.
  • the source RNC can obtain the transmission delay parameter of the UE to the NB through the RACH procedure: a propagation delay parameter or an extended propagation delay parameter, and the accuracy is defined according to the protocol. 2chip, which is 0.52us, and the accuracy of the TA obtained by the RACH process in LTE is 0.52us, so the accuracy of these two parameters is on the same order of magnitude, and in the case of eNB and NB co-site or common antenna, UE to eNB and The distance from the UE to the NB is the same, that is, the same signal transmission delay. Therefore, when the UE is handed over from the UMTS cell to the LTE cell, the UE can use the propagation delay or Extended propagation delay parameter in the UMTS to obtain the signal.
  • the TA performs the first uplink transmission time adjustment of the target cell.
  • the source RNC can be set to ⁇ ⁇ off; then the amount to get J round trip time and extended round trip Time (Optional)
  • the source RNC may first calculate the value of the UE to NB transmission delay (hereinafter referred to as PD) in the UMTS cell according to the following formula, and then convert the PD value to the TA value:
  • PD (round trip time or extended round trip time - UE Rx-Tx time difference)/2.
  • the UE Rx-Tx time difference characterizes the time difference between the UE downlink dedicated physical channel frame reception time and the uplink dedicated physical control channel/uplink dedicated physical data channel frame transmission time; round trip time or extended round trip time indicates that the NB receives the uplink The time difference between the dedicated physical control channel frame time and the NB downlink dedicated physical channel frame transmission time.
  • the round trip time and extended round trip time (optional) parameters indicate the transmission delay of the signal from NB to the UE and back to NB with an accuracy of 0.5 chip or 0.13us.
  • the parameter UE Rx-Tx time difference there is a time difference between the uplink transmission and the downlink reception of the UE, that is, the parameter UE Rx-Tx time difference, and the accuracy is 1.5 chip or 0.39us.
  • the time relationship between these two parameters is shown in Figure 3.
  • (round trip time or extended round trip time - UE Rx-Tx time differenced/2 is approximately equal to the transmission delay between NB and UE.
  • PD the TA obtained by converting the PD, and the transmission delay accuracy obtained by this method can be directly utilized in the same order of magnitude as the TA.
  • the PD Since the units of the PD and the TA are different, the PD is converted into a unit, and the value of the corresponding TA can be obtained.
  • the specific conversion process belongs to the prior art and will not be described here.
  • the network switching method of the UMTS to the LTE provided by the embodiment of the present invention, for the process on the UE side, as shown in FIG. 4, includes the following steps:
  • the UE sends a measurement report including a co-located LTE neighboring cell to the source RNC in the UMTS cell.
  • the UE receives the handover command sent by the source RNC, where the handover command carries the uplink resource information that the target eNB allocates for the UE to send the handover complete message, the indication that the target cell does not need to perform the RACH procedure, and the TA information.
  • the UE completes the handover from UMTS to LTE according to the indication of the handover command.
  • the method for obtaining the value of the TA in the TA information and the method for obtaining the uplink resource information in the foregoing process are the same as those described above, and are not described here.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the flow of the first embodiment is as shown in FIG. 5, and includes the following steps:
  • S501 The UE sends a measurement report including a co-located LTE neighboring cell to the source RNC in the UMTS serving cell.
  • the source RNC makes a handover decision to the target LTE cell, and sends a handover request message to the target eNB.
  • the target eNB performs the admission and related resource preparation, and sends a handover request response message to the source RNC.
  • the handover request response message includes uplink resource information that is allocated to the UE to send the handover complete message.
  • the source RNC sends a handover command to the UE, where the handover command includes the following content in addition to the conventional content:
  • the indication may be, for example, a No RACH indication or a co-site indication
  • the UE sends a handover complete message directly to the target eNB according to the uplink resource information in the handover command.
  • the other steps are the same as the normal UMTS to LTE network handover process.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the process of the second embodiment is as shown in FIG. 6, and includes the following steps:
  • the source RNC configures the system measurement for the UE in the DCH state (the state of the UE in the connected mode, named by the Dedicated Transport Channels (D CH )).
  • the additional measurement (additional meas urement) item is configured, the additional measurement item includes a UE po sitioning measurement item;
  • the source RNC may perform measurement control on the UE.
  • the (Measure Control) message is configured with an additional measurement item, and the additional measurement item includes a UE positioning measurement item. After the measurement control message is sent to the UE, the UE performs round trip time and UE Rx-Tx time difference measurement.
  • the UE sends a measurement report including a co-located LTE neighboring cell to the source RNC in the UMTS serving cell.
  • the source RNC makes a handover decision to the target LTE cell according to the measurement report that includes the co-located LTE neighboring cell, and sends a handover request message to the target eNB.
  • the target eNB performs the admission and related resource preparation, and sends a handover request response message to the source RNC.
  • the handover request response message includes uplink resource information that is allocated to the UE to send the handover complete message.
  • the source RNC sends a handover command to the UE, where the handover command includes the following contents in addition to the conventional content:
  • the indication may be a No RACH indication or a co-site indication
  • the UE sends a handover completion message directly to the target eNB according to the uplink resource information in the handover command.
  • the other steps are the same as the normal UMTS to LTE network handover procedure.
  • an embodiment of the present invention further provides a radio network controller, a user equipment, and a network switching system of UMTS to LTE.
  • the principle of the problem solved by these devices and systems is similar to the foregoing UMTS to LTE network switching method. Therefore, the implementation of these devices and systems can be referred to the implementation of the foregoing method, and the repeated description will not be repeated.
  • a handover decision module 701 configured to receive, by the user equipment UE that is in its jurisdiction, a measurement report including a co-located long-term evolution LTE neighboring cell, to perform a handover decision of the UE to the target LTE cell, and a sending module 702, configured to After the handover decision of the UE to the target LTE cell, the UE sends a handover request message to the target eNB; and after receiving the handover request response message returned by the target eNB, the receiving module 703 sends a handover command to the UE, indicating that the UE is in accordance with The uplink resource information carried in the handover command, the indication of the random access channel RACH procedure without the target cell, and the timing advance TA information to complete the handover access from the source UMTS cell to the target LTE cell;
  • the receiving module 703 is configured to receive a handover request response message that is returned by the target eNB, where the handover request response message carries uplink resource information that is sent by the target eNB to the UE to send a handover complete message.
  • the method further includes: a TA information acquiring module 704, configured to: when the UE is in a UMTS cell The transmission delay of the UE to the base station NB obtained through the RACH procedure is converted to the value of the TA.
  • the UE to NB transmission delay is a propagation delay Propagation Delay parameter or an extended transmission delay of the RNC side.
  • Propagation Delay parameter when the UE is in a UMTS cell, the UE to NB transmission delay is a propagation delay Propagation Delay parameter or an extended transmission delay of the RNC side.
  • the indication carried in the handover command that does not need to go to the target cell to perform the RACH procedure is a No RACH indication or a co-site indication.
  • the second possible implementation manner of the radio network controller provided by the embodiment of the present invention may further include: a TA information acquiring module 704;
  • the sending module 702 is further configured to: when the UE is in the UMTS cell and in the DCH state of the dedicated transport channel, send a different system measurement control Measurement Control message, where the measurement control message includes a user positioning measurement UE positioning measurement item ;
  • the receiving module 703 is further configured to receive a different system measurement report sent by the UE.
  • the ⁇ information obtaining module 704 is configured to obtain, according to the different system measurement report, a value of a UE Rx-Tx time difference and a value of a round trip time or an extended round trip time; and calculate, according to the following formula, that the UE is in the UMTS cell
  • the UE Rx-Tx time difference characterizes a time difference between a UE downlink dedicated physical channel frame reception time and an uplink dedicated physical control channel/uplink dedicated physical data channel frame transmission time;
  • the trip time or the extended round trip time characterizes the time difference between the NB receiving the uplink dedicated physical control channel frame time and the NB downlink dedicated physical channel frame transmission time.
  • the sending module 702 is specifically configured to configure, in the measurement control message, an added measurement additional measurement item, where the additional measurement item includes the UE a positioning measurement item; sending the different system measurement control message to the UE.
  • the radio network controller includes:
  • the processor 901 is configured to receive, by the user equipment UE that is in its jurisdiction, a measurement report that includes a co-located long-term evolution LTE neighboring cell, and make a handover decision of the UE to the target LTE cell.
  • the transceiver 902 is configured to: after the processor 901 makes a handover decision of the UE to the target LTE cell, send a handover request message to the target eNB; and receive a handover request response message returned by the target eNB, where the handover request response message is carried And the uplink resource information that is sent by the target eNB to the UE to send a handover complete message; and after receiving the handover request response message returned by the target eNB, sending a handover command to the UE, instructing the UE to follow the
  • the uplink resource information carried in the handover command, the indication of the random access channel RACH procedure without the target cell, and the timing advance TA information are used to complete the handover access from the source UMTS cell to the target LTE cell.
  • a first implementation manner of the UE provided by the embodiment of the present invention, as shown in FIG. 10, includes: a different system measurement module 1001, configured to be in the same station in a universal mobile communication service UMTS area
  • the LTE neighboring cell performs the inter-system measurement, and sends the inter-system measurement report to the source radio network controller RNC.
  • the receiving module 1002 is configured to receive the handover command sent by the source RNC, where the handover command carries the target base station e NB
  • the switching module 1003 is configured to complete handover access from the source UMTS cell to the target LTE cell according to the indication of the handover command.
  • the receiving module 1003 is further configured to: when the UE is in a UMTS cell and in a dedicated transport channel DCH state, receive a measurement control Measurement Control sent by the source RNC. a message; the additional measurement of the Measurement Control message includes a user positioning measurement UE positioning measurement item;
  • the different system measurement module 1001 is further configured to perform an inter-system measurement according to the Measurement Control message, and include, on the source RNC, a different system including a UE Rx-Tx time difference and a round trip time or an extended round trip time.
  • the UE Rx-Tx time difference characterizes the time difference between the UE downlink dedicated physical channel frame reception time and the uplink dedicated physical control channel/uplink dedicated physical data channel frame transmission time; the round trip time or extended round trip time
  • the time difference between the NB receiving the uplink dedicated physical control channel frame time and the NB downlink dedicated physical channel frame sending time is characterized.
  • the indication that the handover command carries the RACH procedure without going to the target cell is a No RACH indication or a co-site indication.
  • a second implementation manner of the UE provided by the embodiment of the present invention includes: a processor 1101, configured to perform heterogeneous system measurement on a co-located LTE neighboring cell in a universal mobile communication service UMTS cell, and send a different The system measurement report is sent to the source radio network controller RNC; and the handover access from the source UMTS cell to the target LTE cell is completed according to the indication of the handover command; the transceiver 1102 is configured to receive the handover command sent by the source RNC, The handover command carries uplink resource information that is allocated by the target base station eNB for the UE to send a handover complete message, There is no need to go to the target cell to perform an indication of the random access channel RACH procedure and the timing advance TA information.
  • a UMTS-to-LTE network switching system provided by the embodiment of the present invention, as shown in FIG. 12, includes:
  • a radio network controller (RNC) 1201 located in the UMTS, configured to send a handover request message to the target base station eNB after making a handover decision to the target LTE cell according to the measurement report of the co-located LTE neighboring cell sent by the user equipment UE 1202; And receiving, by the target eNB, a handover request response message, where the handover request response message carries uplink resource information that is sent by the target eNB to the UE 1202 to send a handover complete message; and sends a handover command to the UE 1202.
  • the handover command carries the uplink resource information, an indication that the target cell does not need to perform a random access channel RACH procedure, and a timing advance TA information;
  • the UE 1202 is configured to send a measurement report including a co-located LTE neighboring cell to the RNC 1201, and receive a handover command sent by the source RNC, and complete, according to the indication of the handover command, a source UMTS cell to a target LTE cell. Switch access.
  • the handover command sent by the source RNC to the UE includes an indication that the RACH process is not required to go to the target cell, and Since the uplink resource of the handover completion message is pre-allocated by the UE, and the value of the TA is determined by the source RNC in advance, the three contents are carried in the handover command and sent to the UE, and the UE may receive the handover command after receiving the handover command.
  • the access to the target cell is performed directly, and the RACH process does not need to be performed in the target cell, which shortens the interruption delay caused by the RACH process, and also saves related resources of the RACH.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can be embodied in the form of one or more computer program products embodied on a computer-usable storage medium (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which computer usable program code is embodied.
  • a computer-usable storage medium including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the present invention is directed to a method, apparatus (system), and computer program according to an embodiment of the present invention.
  • the flow chart and/or block diagram of the product is described. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG.
  • These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Les modes de réalisation de la présente invention concernent un procédé, un dispositif et un système de transfert intercellulaire de réseau UMTS-LTE. Dans une scène de copositionnement, une commande de transfert intercellulaire transmise à partir d'un RNC source à un UE comprend une indication selon laquelle un processus RACH dans une cellule cible n'est pas nécessaire, une ressource de liaison montante d'un message d'exécution de transfert intercellulaire transmis par l'UE est pré-allouée à l'avance, la valeur de TA est déterminée par le RNC source à l'avance, la commande de transfert intercellulaire contenant l'indication, la ressource de liaison montante et la valeur TA sont transmises à l'UE, et l'UE peut directement accéder à la cellule cible après réception de la commande de transfert intercellulaire, sans effectuer le processus RACH dans la cellule cible, de sorte que le retard d'interruption causé par le processus RACH est raccourci, et les ressources associées du RACH sont également économisées.
PCT/CN2013/080903 2013-08-06 2013-08-06 Procédé, dispositif et système de transfert intercellulaire de réseau umts-lte WO2015017977A1 (fr)

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CN201380001574.4A CN104521252B (zh) 2013-08-06 2013-08-06 一种umts到lte的网络切换方法、设备及系统
PCT/CN2013/080903 WO2015017977A1 (fr) 2013-08-06 2013-08-06 Procédé, dispositif et système de transfert intercellulaire de réseau umts-lte

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