CN104521252B - A kind of method for switching network of UMTS to LTE, equipment and system - Google Patents
A kind of method for switching network of UMTS to LTE, equipment and system Download PDFInfo
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- CN104521252B CN104521252B CN201380001574.4A CN201380001574A CN104521252B CN 104521252 B CN104521252 B CN 104521252B CN 201380001574 A CN201380001574 A CN 201380001574A CN 104521252 B CN104521252 B CN 104521252B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- 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
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Abstract
The embodiment of the invention provides the method for switching network of UMTS to LTE a kind of, equipment and system, under the scene of co-sited, source RNC contains the instruction without going Target cell to carry out RACH process into the switching command that UE is issued, and, the ascending resource of handoff completion message is sent due to having pre-allocated UE in advance, and the value of TA is defined by source RNC in advance, this three contents are all carried and are handed down to UE in switching command, UE can be after receiving switching command, directly accessed to Target cell, without carrying out RACH process in Target cell, it shortens since RACH process bring interrupts time delay, the related resource of RACH is also saved simultaneously.
Description
Technical field
The present invention relates to mobile communications network field more particularly to a kind of universal mobile telecommunications services (UMTS) to drilling for a long time
Into the method for switching network of (LTE), equipment and system.
Background technique
Multiple types e-learning quality brings deployment and managerial difficulty to operator, for example comes from the angle of 3GPP
It sees, arrives wideband code division from global system for mobile communications (Global System for Mobile, Communications, GSM)
Multiple access (Wideband Code Division Multiple Access, WCDMA) arrives long term evolution (Long Term again
Evolution, LTE), an operator will run three simultaneously and throw the net network, how to be managed and safeguard, network and network it is mutual
Between relationship how, which type of business resides in where throws the net on network, variety of problems has to be solved.In this case,
Single access net (Single Radio Access Network, SingleRAN) is come into being.Single RAN passes through unification
R&M management, unified wireless resource management, the optimization of unified network planning system, unified transmission resource management, to support
The fusion and evolution of different technologies standard.It implements i.e. in such a way that the access network node of multiple types concentrates in together,
That is Multi-Mode Base Station, the evolved NodeB of eNB() and NB and base transceiver station (Base Transceiver Station, BTS)
Co-sited.
In universal mobile telecommunications service (the Universal Mobile Telecommunications of Single RAN
System, UMTS) and LTE coexistence scenario under, be total to overlay area in UMTS and LTE, between UMTS and LTE exist based on covering or
The switching of person's load, wherein the network handover routines of UMTS to LTE are as shown in Figure 1, include following several steps:
(1) user equipment (User Equipment, UE) UMTS serving cell report isosystem measurement report to source without
Line network controller (Radio Network Controller, RNC);
(2) source RNC sends switching request to target eNB by UMTS and LTE core network node；
(3) target eNB carries out related resource preparation after receiving switching request and passes through LTE and UMTS core net node to source
RNC sends handover request ack message；
(4) source RNC sends switching command to UE；
(5) UE initiates random access to target LTE cell according to the resource allocation in switching command；
(6) after UE is successfully accessed target LTE cell, handoff completion message is sent to target eNB, then carries out core net again
The update of routing.
Since in LTE system, the uplink signal of different UE wants time unifying when reaching eNodeB, to guarantee uplink between UE
The orthogonality of signal, to help to eliminate the interference in cell.Signal has delay in space propagation, if UE is being called
Period is mobile to the direction far from base station, then the signal issued from base station will " increasingly slower " arrival UE, at the same time, UE's
Signal also can " increasingly later " arrival base station, postpone the too long signal and base station that will lead to UE that base station receives on this time slot
The time slot for receiving next other UE signals is overlapped, causes intersymbol interference.The time unifying of uplink is logical in LTE system
It crosses in the sending side UE application time lead (Timing Advance, TA) Lai Shixian, the main function of TA is to eliminate
Different propagation delay time between UE, UE adjust sending time according to TA when carrying out uplink transmission.
Current UMTS to LTE(abbreviation U → L) switching time delay mainly from UE receive switching command after in LTE with
Machine obtains during accessing channel (Radom Access Channel, RACH), and the RACH process is primarily to acquisition time
Lead (Timing advance, TA) and subsequent upstream send the resource of handoff completion message.
Since RACH process is initiated after UE receives switching command, above-mentioned RACH process can increase to a certain extent
Add the handoff time delay of U → L, simultaneously because the RACH process UE in handoff procedure uses dedicated Preamble code to provide
Source, i.e. target eNB also need the handoff procedure for UE to mark off dedicated Preamble code resource, occupy certain dedicated
Code resource.
Summary of the invention
The embodiment of the invention provides the method for switching network of UMTS to LTE a kind of, equipment and systems, to arrive in UMTS
In the network switching process of LTE, shorten the handoff time delay of UMTS to LTE, and saves LTE private code resource.
In a first aspect, the embodiment of the invention provides the nets of universal mobile telecommunications service UMTS to long term evolution LTE a kind of
Network switching method, comprising:
The survey comprising the same station adjacent area LTE that service wireless network controller RNC in source is issued according to user equipment (UE) in UMTS
Amount report is made after the switch decision of target LTE cell, sends switching request message to target BS eNB；
The source RNC receives the handover request ack message that target eNB is returned, and carries in the handover request ack message
Having the target eNB is the ascending resource information to send handoff completion message of UE distribution；
The source RNC to the UE send switching command, instruction UE according to carried in the switching command it is described on
Row resource information, without going, Target cell carries out the instruction of random access channel RACH process and Timing Advance TA information is come
It completes to access from source UMTS cell to the switching of target LTE cell.
With reference to first aspect, in the first possible embodiment, the TA information is that the source RNC passes through following sides
Formula obtains:
The source RNC by the UE in UMTS cell when got by RACH process UE to base station NB transmission when
Prolong the value for being converted to the TA.
The possible embodiment of with reference to first aspect the first, in second of possible embodiment, the UE exists
When in UMTS cell the propagation delay time of UE to NB be the side the source RNC propagation delay time Propagation Delay parameter or
Extend propagation delay time Extended Propagation Delay parameter.
With reference to first aspect, first and second kind of possible embodiment of first aspect, in the third possible embodiment
In, the No RACH that is designated as without going Target cell to carry out RACH process carried in the switching command is indicated or with station
Instruction.
With reference to first aspect, in the 4th kind of possible embodiment, the TA information is that the source RNC passes through following sides
Formula obtains:
The source RNC is sent to it different system and surveys when UE is in UMTS cell and is in dedicated transmission channel DCH state
Amount controls Measurement Control message, includes user's positioning measurement UE in the measurement control message
Positioning measurement；
The source RNC receives the isosystem measurement report that UE is sent, and obtains UE Rx- from isosystem measurement report
The value of Tx time difference and the value of round trip time or extended round trip time；
The value of the propagation delay time of UE to NB when the source RNC calculates UE in UMTS cell according to following formula, then will
The value of the calculated propagation delay time is converted into the value of TA:
The propagation delay time of UE to NB=(round trip time or extended round when UE is in UMTS cell
trip time-UE Rx-Tx time difference)/2；
The UE Rx-Tx time difference is the characterization UE downward special physical channel frame time of reception and uplink
Dedicated Physical Control Channel/uplink Dedicated Physical Data channel frame sending instant time difference；
Round trip time or extended the round trip time is that characterization NB receives uplink Dedicated Physical
The time difference at control channel frame moment and NB downward special physical channel frame sending instant.
The 4th kind of possible embodiment with reference to first aspect, in the 5th kind of possible embodiment, source RNC is to UE
Send isosystem measurement control message, comprising:
The source RNC configures increased measurement Additional measurement in measurement control message, described
It include UE positioning measurement in Additional measurement；
The source RNC issues the isosystem measurement control message to UE.
Second aspect, the embodiment of the invention provides the nets of universal mobile telecommunications service UMTS to long term evolution LTE a kind of
Network switching method, comprising:
User equipment (UE) is sent in UMTS cell comprising the measurement report with the station adjacent area LTE to source radio network controller
RNC；
The UE receives the switching command that the source RNC is sent, and carries target BS eNB in the switching command as institute
State the ascending resource information to send handoff completion message of UE distribution, without going Target cell to carry out random access channel
The instruction and Timing Advance TA information of RACH process；
The UE completes to access from source UMTS cell to the switching of target LTE cell according to the instruction of the switching command.
In conjunction with second aspect, in the first possible embodiment, the TA information is that the source RNC passes through following sides
Formula obtains:
The source RNC by the UE in UMTS cell when the propagation delay time of UE to NB that is got by RACH process turn
It is changed to the value of the TA.
In conjunction with the first possible embodiment of second aspect, in second of possible embodiment, the UE exists
The propagation delay time of UE to NB is the propagation delay time Propagation Delay parameter or extension of the side source RNC when in UMTS cell
Propagation delay time Extended Propagation Delay parameter.
In conjunction with the first possible embodiment of second aspect, in the third possible embodiment, this method is also
Include:
The UE receives the measurement control that source RNC is issued in UMTS cell and when being in dedicated transmission channel DCH state
Measurement Control message, the increased measurement Additional of the Measurement Control message
It include user's positioning measurement UE positioning measurement in measurement；The UE is according to
Measurement Control message carries out isosystem measurement, and reporting to the source RNC includes UE Rx-Tx time
The isosystem measurement of difference and round trip time or extended round trip time is reported；
The value of TA in the received switching command of UE is obtained by following manner:
The value of the propagation delay time of UE to NB when the source RNC calculates UE in UMTS cell according to following formula, then will
The value of the calculated propagation delay time is converted into TA value:
The propagation delay time of UE to NB=(round trip time or extended round when UE is in UMTS cell
trip time-UE Rx-Tx time difference)/2；
The UE Rx-Tx time difference characterization UE downward special physical channel frame time of reception is special with uplink
With physical control channel/uplink Dedicated Physical Data channel frame sending instant time difference；
Round trip time or extended round trip time the characterization NB receives uplink Dedicated Physical control
Channel frame processed and NB send the time difference of downward special physical channel frame.
In conjunction with second aspect, the first~tri- kind of possible embodiment of second aspect, in the 4th kind of possible embodiment party
It carries in formula, in the switching command and indicates or without the No RACH that is designated as going Target cell to carry out RACH process with station
Instruction.
The third aspect, the embodiment of the invention provides a kind of radio network controller (RNC)s, are located at universal mobile telecommunications service
UMTS network, comprising:
Switch decision module, for being issued in the user equipment (UE) for receiving its administration comprising adjacent with station long term evolution LTE
The measurement report in area makes switch decision of the UE to target LTE cell；
Sending module, for being sent to target BS eNB after making switch decision of the UE to target LTE cell
Switching request message；And after the handover request ack message that receiving module receives target eNB return, Xiang Suoshu UE is sent
Switching command, indicate UE according to the ascending resource information carried in the switching command, without going Target cell to carry out
The instruction of random access channel RACH process and Timing Advance TA information are completed from source UMTS cell to target LTE cell
Switching access；
Receiving module, for receiving the handover request ack message of target eNB return, in the handover request ack message
Carry the ascending resource information to send handoff completion message that the target eNB is UE distribution.
In conjunction with the third aspect, in the first possible embodiment, the RNC further include:
TA data obtaining module, the UE got when for by the UE in UMTS cell by RACH process to base station
The propagation delay time of NB is converted to the value of the TA.
In conjunction with the first possible embodiment of the third aspect, in second of possible embodiment, the UE exists
The propagation delay time of UE to NB is the propagation delay time Propagation Delay parameter or expansion of the side RNC when in UMTS cell
Open up propagation delay time Extended Propagation Delay parameter.
In conjunction with the third aspect, first and second kind of possible embodiment of the third aspect, in the third possible embodiment
In, the No RACH that is designated as without going Target cell to carry out RACH process carried in the switching command is indicated or with station
Instruction.
In conjunction with the third aspect, in the 4th kind of possible embodiment, the RNC, further includes: TA data obtaining module；
The sending module is also used in UE in UMTS cell and when being in dedicated transmission channel DCH state, Xiang Qifa
It send isosystem measurement to control Measurement Control message, includes user's positioning measurement UE in the measurement control message
Positioning measurement；
The receiving module is also used to receive the isosystem measurement report of UE transmission；
The TA data obtaining module, for obtaining UE Rx-Tx time from isosystem measurement report
The value of difference and the value of round trip time or extended round trip time；And according to following formula
The value of the propagation delay time of UE to NB when calculating UE in UMTS cell, then convert the value of the calculated propagation delay time to
The value of TA: the propagation delay time of UE to NB=(round trip time or extended round trip when UE is in UMTS cell
time-UE Rx-Tx time difference)/2；The UE Rx-Tx time difference characterizes UE downlink dedicated object
Manage the channel frame time of reception and special physical controlling channel of upward/uplink Dedicated Physical Data channel frame sending instant time
Difference；Round trip time or extended round trip time the characterization NB receives uplink Dedicated Physical control letter
The time difference at road frame moment and NB downward special physical channel frame sending instant.
In conjunction with the 4th kind of possible embodiment of the third aspect, in the 5th kind of possible embodiment, the transmission
Module, it is described specifically for configuring increased measurement Additional measurement in measurement control message
It include UE positioning measurement in Additional measurement；It is issued to UE described different
Systematic survey control message.
Fourth aspect, the embodiment of the invention provides a kind of radio network controller (RNC)s, are located at universal mobile telecommunications service
UMTS network, comprising:
Processor, for being issued in the user equipment (UE) for receiving its administration comprising the survey with the station adjacent area long term evolution LTE
Amount report, makes switch decision of the UE to target LTE cell；
Transceiver, for after processor makes switch decision of the UE to target LTE cell, to target BS eNB
Send switching request message；The handover request ack message that target eNB is returned is received, is carried in the handover request ack message
Having the target eNB is the ascending resource information to send handoff completion message of UE distribution；And receiving mesh
After marking the handover request ack message that eNB is returned, Xiang Suoshu UE sends switching command, indicates UE according in the switching command
The ascending resource information carried, the instruction without going Target cell progress random access channel RACH process and time mention
Preceding amount TA information come complete from source UMTS cell to the switching of target LTE cell access.
5th aspect, the embodiment of the invention provides a kind of user equipment (UE)s, comprising:
Isosystem measurement module, for carrying out different system to the same station adjacent area LTE in universal mobile telecommunications service UMTS cell
Unified test amount, and isosystem measurement report is sent to source radio network controller RNC；
Receiving module carries target BS in the switching command for receiving the switching command of the source RNC transmission
ENB is the ascending resource information to send handoff completion message of UE distribution, without going Target cell to be connect at random
Enter the instruction and Timing Advance TA information of channel RACH process；
Switching module is completed for the instruction according to the switching command from source UMTS cell cutting to target LTE cell
Changing-over enters.
In conjunction with the 5th aspect, in the first possible embodiment, the receiving module is also used to exist as the UE
In UMTS cell and when being in dedicated transmission channel DCH state, the measurement control Measurement that source RNC is issued is received
Control message；In increased measurement Additional measurement of the Measurement Control message
Include user's positioning measurement UE positioning measurement；
The isosystem measurement module is also used to carry out different system survey according to the Measurement Control message
Amount, and reporting to the source RNC includes UE Rx-Tx time difference and round trip time or extended
The isosystem measurement of round trip time is reported；The UE Rx-Tx time difference characterizes UE downlink dedicated object
Manage the channel frame time of reception and special physical controlling channel of upward/uplink Dedicated Physical Data channel frame sending instant time
Difference；Round trip time or extended round trip time the characterization NB receives uplink Dedicated Physical control letter
The time difference at road frame moment and NB downward special physical channel frame sending instant.
In terms of the 5th, the first possible embodiment of the 5th aspect, in second of possible embodiment,
It carries in the switching command and indicates or without the No RACH that is designated as going Target cell to carry out RACH process with station instruction.
6th aspect, the embodiment of the invention provides a kind of user equipment (UE)s, comprising:
Processor, for carrying out isosystem measurement to the same station adjacent area LTE in universal mobile telecommunications service UMTS cell, and
Isosystem measurement report is sent to source radio network controller RNC；And the instruction according to the switching command, it completes from source
The switching of UMTS cell to target LTE cell accesses；
Transceiver carries target BS in the switching command for receiving the switching command of the source RNC transmission
ENB is the ascending resource information to send handoff completion message of UE distribution, without going Target cell to be connect at random
Enter the instruction and Timing Advance TA information of channel RACH process.
7th aspect, the embodiment of the invention provides the nets of universal mobile telecommunications service UMTS to long term evolution LTE a kind of
Network switching system, comprising:
Radio network controller (RNC) is located in UMTS, includes with the station adjacent area LTE for what is issued according to user equipment (UE)
Measurement report make after the switch decision of target LTE cell, to target BS eNB send switching request message；Receive mesh
The handover request ack message that eNB is returned is marked, the target eNB is carried in the handover request ack message as the UE points
The ascending resource information to send handoff completion message matched；Switching command is sent to the UE, is taken in the switching command
With the ascending resource information, without going Target cell to carry out instruction and the time advance of random access channel RACH process
Measure TA information；
UE includes the measurement report with the station adjacent area LTE to the RNC for sending, and receives what the source RNC was sent
Switching command, and according to the instruction of the switching command, it completes to access from source UMTS cell to the switching of target LTE cell.
The beneficial effect of the embodiment of the present invention includes:
Method for switching network, equipment and the system of above-mentioned UMTS to LTE provided in an embodiment of the present invention, in the scene of co-sited
Under, source RNC contained into the switching command that UE is issued without go Target cell carry out RACH process instruction, also, due to
Pre-allocated the ascending resource that UE sends handoff completion message in advance, and defined the value of TA by source RNC in advance, by this three
Item content is all carried is handed down to UE in switching command, and UE can directly arrive Target cell progress after receiving switching command
Access is shortened without carrying out RACH process in Target cell since RACH process bring interrupts time delay, while
Save the related resource of RACH.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without any creative labor, it can also be obtained according to these attached drawings
His attached drawing.
Fig. 1 is the schematic diagram of the network handover routines of UMTS to LTE in the prior art；
Flow chart of the method for switching network in the source side RNC that Fig. 2 is UMTS to LTE provided in an embodiment of the present invention；
Fig. 3 is the pass of round trip time and UE Rx-Tx time difference provided in an embodiment of the present invention
System's figure；
Fig. 4 is the flow chart in the side UE of the method for switching network of UMTS to LTE provided in an embodiment of the present invention；
Fig. 5 is the detail flowchart of embodiment one；
Fig. 6 is the detail flowchart of embodiment two.
Fig. 7 is the first structural schematic diagram of radio network controller provided in an embodiment of the present invention；
Fig. 8 is second of structural schematic diagram of radio network controller provided in an embodiment of the present invention；
Fig. 9 is the third structural schematic diagram of radio network controller provided in an embodiment of the present invention
Figure 10 is the first structural schematic diagram of user equipment provided in an embodiment of the present invention；
Figure 11 is second of structural schematic diagram of user equipment provided in an embodiment of the present invention；
Figure 12 is the structural schematic diagram of the network switching system of UMTS to LTE provided in an embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that the described embodiments are only some of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
With reference to the accompanying drawings of the specification, to a kind of method for switching network of UMTS to LTE provided in an embodiment of the present invention, set
Standby and system specific embodiment is illustrated.
The method for switching network of UMTS to LTE provided in an embodiment of the present invention a kind of, the Serving RNC of UE is (following in UMTS
Referred to as source RNC) side process as shown in Fig. 2, including the following steps:
Source Serving RNC is made according to the measurement report comprising the same station adjacent area LTE that UE is issued to target in S201, UMTS
After the switch decision of LTE cell, switching request message is sent to target eNB；
S202, source RNC receive the handover request ack message that target eNB is returned, and carry in the handover request ack message
Having target eNB is the ascending resource information to send handoff completion message of UE distribution；
S203, source RNC to UE send switching command, instruction UE according to the ascending resource information carried in switching command,
The switching from UMTS to LTE is completed without going Target cell to carry out instruction and the TA information of RACH process.
By the above process, UE can use in switching command and carry after the switching command for receiving source RNC transmission
Relevant information directly arrive Target cell and accessed, ascending resource information and TA letter can be got without executing RACH process
Breath, compared with prior art, the RACH process executed in LTE after being connected to switching command due to eliminating UE shortens
The network switching of UMTS to LTE interrupts time delay, while having saved dedicated Preamble code resource.
In the above method provided in an embodiment of the present invention, the money of uplink used in the subsequent transmission handoff completion message of UE
Source can be distributed in advance by target eNB and inform UE by source RNC, and for the value of TA, source RNC can then pass through following two kinds of sides
Formula obtains:
1, source RNC by UE in UMTS cell when UE to NB propagation delay time (Propagation Delay, PD) turned
Get the value of TA in return.
When UE is in UMTS cell, source RNC can obtain propagation delay time, that is, parameter of UE to NB by RACH process: when transmission
Prolong (propagation delay) parameter or extension propagation delay time (Extended propagation delay) parameter, according to
Its precision of protocol definition be 2chip, i.e. 0.52us, and in LTE RACH process obtain TA precision be 0.52us, therefore this two
A parameters precision is on the same order of magnitude, also, in the case where eNB and NB co-sited or shared antenna, UE to eNB and UE to NB
Distance it is identical, i.e., therefore signal propagation delay time having the same it is small to be switched to LTE from UMTS cell as UE in this case
The progress of propagation delay or Extended the propagation delay parameter in UMTS can be used in Qu Shi, UE
The TA obtained after conversion adjusts to carry out the first time uplink transmission time of Target cell.
2, source RNC can configure measurement of correlation and get round trip time and extended round trip time
(optional), the propagation delay time of UE to NB is (hereinafter referred to as when source RNC first can calculate UE in UMTS cell according to following formula
PD value), then the PD value is converted into TA value:
PD=(round trip time or extended round trip time-UE Rx-Tx time
difference)/2。
In above formula, UE Rx-Tx time difference characterizes the UE downward special physical channel frame time of reception and uplink
Dedicated Physical Control Channel/uplink Dedicated Physical Data channel frame sending instant time difference；Round trip time or
Extended round trip time characterization NB receives special physical controlling channel of upward frame moment and NB downlink Dedicated Physical
The time difference of channel frame sending instant.
Round trip time and extended round trip time(is optional) parameter representation signal from NB to UE
The propagation delay time of NB is returned again to, precision is 0.5chip, that is, 0.13us.Meanwhile UE is carried out between uplink transmission and downlink reception
There are a time difference, that is, parameter UE Rx-Tx time difference, precision is 1.5chip, that is, 0.39us.The two ginsengs
Several time relationships are as shown in figure 3, from figure 3, it can be seen that (round trip time or extended round trip
Time-UE Rx-Tx time difference)/2 it is approximately equal to propagation delay time PD between NB to UE, after PD is converted
Obtained TA, the propagation delay time precision obtained using the method and TA can be utilized directly on the same order of magnitude.
Since the unit of PD and TA is different, PD is carried out to the conversion of unit, the value of available corresponding TA is specific to turn
The process of changing belongs to the scope of the prior art, and details are not described herein.
The method for switching network of UMTS to LTE provided in an embodiment of the present invention, for the process of the side UE, such as Fig. 4 institute
Show, includes the following steps:
S401, UE are sent in UMTS cell comprising the measurement report with the station adjacent area LTE to source RNC；
S402, UE receive the switching command that source RNC is sent, and the use that target eNB is UE distribution is carried in switching command
To send the ascending resource information of handoff completion message, without going Target cell to carry out the instruction and TA information of RACH process；
S403, UE complete the switching from UMTS to LTE according to the instruction of the switching command.
The acquisition modes of the acquisition modes of the value of TA and ascending resource information and aforementioned phase in TA information in above-mentioned process
Together, details are not described herein.
The method for switching network for UMTS to the LTE that embodiment provides in order to better illustrate the present invention, has below with two
The embodiment of body illustrates.
Embodiment one:
The process of the present embodiment one is as shown in figure 5, include the following steps:
S501, UE are sent in UMTS serving cell comprising the measurement report with the station adjacent area LTE to source RNC；
S502, source RNC make the switch decision to target LTE cell, send switching request message and give target eNB；
S503, target eNB carry out access and related resource prepares, and send handover request ack message and give source RNC；Switching is asked
Asking includes the ascending resource information to send handoff completion message distributed to UE in response message；
S504, source RNC give UE to send switching command, further include following in the switching command other than conventional content
Content:
A) the ascending resource information in handover request ack message；
B) inform that UE is not necessarily to the instruction for going Target cell to carry out RACH process；The instruction for example can be No RACH instruction
Or with station instruction；
C) value of TA information, TA passes through the propagation delay or Extended in UMTS system
The value of propagation delay is converted to；
S505, UE directly send handoff completion message to target eNB according to the ascending resource information in switching command；Its
His step is identical as the network switching process of normal UMTS to LTE.
Embodiment two:
The process of the present embodiment two is as shown in fig. 6, include the following steps:
S601, in the case where eNB and NB co-sited, source RNC is in a kind of DCH state (shape of UE under connection mode
State is named with dedicated transmission channel (Dedicated Transport Channels, DCH)) UE configure isosystem measurement
When, the configuration of increased measurement (additional measur ement) item is carried out, in additional measurement
Including user's positioning measurement (UE posit ioning measurement) item；
Specifically, in this S601, source RNC can control (Measurement in the measurement for being handed down to UE
Control Additional measurement) is configured in message, includes UE in Additional measurement
Positioning measurement, after which is handed down to UE, UE will do it round trip
The measurement of time and UE Rx-Tx time difference.
S602, UE are sent in UMTS serving cell comprising the measurement report with the station adjacent area LTE to source RNC；
S603, source RNC make the switch decision to target LTE cell according to the measurement report comprising the same station adjacent area LTE,
It sends switching request message and gives target eNB；
S604, target eNB carry out access and related resource prepares, and send handover request ack message and give source RNC；Switching is asked
Asking includes the ascending resource information to send handoff completion message distributed to UE in response message；
S605, source RNC get optional comprising round trip time and extended round trip time() and
The measurement report of UE Rx-Tx time difference, according to formula PD=(round trip time or extended
Round trip time-UE Rx-Tx time difference)/2 calculate PD, then PD is subjected to conversion and extrapolates TA value.
S606, source RNC give UE to send switching command, further include following in the switching command other than conventional content
Content:
A) the ascending resource information in handover request ack message；
B) inform that UE is not necessarily to the instruction for going Target cell to carry out RACH process；The instruction can be NoRACH instruction or with station
Instruction；
C) TA information, value is in aforementioned S604 according to round trip time and extended round triptime
(optional) and UE Rx-Tx time difference calculate to obtain；
S607, UE directly send handoff completion message to target eNB according to the ascending resource information in switching command；Its
His step is identical as the network switching process of normal UMTS to LTE.
Based on the same inventive concept, the embodiment of the invention also provides a kind of radio network controller, user equipment and
The network switching system of UMTS to LTE, by the net of the principle of these equipment and the solved problem of system and aforementioned UMTS to LTE
Network switching method is similar, therefore the implementation of these equipment and system may refer to the implementation of preceding method, and it is no longer superfluous to repeat place
It states.
Radio network controller provided in an embodiment of the present invention, as shown in fig. 7, comprises:
Switch decision module 701, for being issued in the user equipment (UE) for receiving its administration comprising with station long term evolution LTE
The measurement report of adjacent area makes switch decision of the UE to target LTE cell；
Sending module 702, for being sent out to target BS eNB after making switch decision of the UE to target LTE cell
Send switching request message；And after the handover request ack message that receiving module 703 receives target eNB return, Xiang Suoshu
UE send switching command, indicate UE according to the ascending resource information carried in the switching command, without going target small
Area carries out instruction and the Timing Advance TA information of random access channel RACH process to complete from source UMTS cell to target
The switching of LTE cell accesses；
Receiving module 703, for receiving the handover request ack message of target eNB return, the switching request response disappears
The ascending resource information to send handoff completion message that the target eNB is UE distribution is carried in breath.
Further, in the first possible embodiment of radio network controller provided in an embodiment of the present invention, such as
Shown in Fig. 7, it can also include: TA data obtaining module 704, be obtained when for by the UE in UMTS cell by RACH process
The propagation delay time of the UE got to base station NB are converted to the value of the TA.
Further, in the first possible embodiment of above-mentioned radio network controller, above-mentioned UE is in UMTS cell
When the propagation delay time of UE to NB is the propagation delay time Propagation Delay parameter or extension transmission of the side RNC when interior
Prolong Extended Propagation Delay parameter.
Further, it in the first possible embodiment of above-mentioned radio network controller, is carried in switching command
The No RACH that is designated as without going Target cell to carry out RACH process is indicated or with station instruction.
Further, in second of radio network controller provided in an embodiment of the present invention possible embodiment, such as
It can also include: TA data obtaining module 704 shown in Fig. 8；
Correspondingly, sending module 702 are also used in UE in UMTS cell and when being in dedicated transmission channel DCH state,
It is sent to it isosystem measurement control Measurement Control message, is positioned in the measurement control message comprising user
Measurement UE positioning measurement；
Receiving module 703 is also used to receive the isosystem measurement report of UE transmission；
TA data obtaining module 704, for obtaining UE Rx-Tx time from isosystem measurement report
The value of difference and the value of round trip time or extended round trip time；And according to following formula
The value of the propagation delay time of UE to NB when calculating UE in UMTS cell, then convert the value of the calculated propagation delay time to
The value of TA: the propagation delay time of UE to NB=(round trip time or extended round trip when UE is in UMTS cell
time-UE Rx-Tx time difference)/2；The UE Rx-Tx time difference characterizes UE downlink dedicated object
Manage the channel frame time of reception and special physical controlling channel of upward/uplink Dedicated Physical Data channel frame sending instant time
Difference；Round trip time or extended round trip time the characterization NB receives uplink Dedicated Physical control letter
The time difference at road frame moment and NB downward special physical channel frame sending instant.
In the possible embodiment of second of radio network controller provided in an embodiment of the present invention, sending module 702,
Specifically for configuring increased measurement Additional measurement, the Additional in measurement control message
It include UE positioning measurement in measurement；The isosystem measurement control is issued to UE
Message processed.
In the third possible embodiment of radio network controller provided in an embodiment of the present invention, as shown in figure 9, should
Radio network controller includes:
Processor 901, for being issued in the user equipment (UE) for receiving its administration comprising with the station adjacent area long term evolution LTE
Measurement report makes switch decision of the UE to target LTE cell；
Transceiver 902, for after processor 901 makes switch decision of the UE to target LTE cell, to target base
The eNB that stands sends switching request message；Receive the handover request ack message that target eNB is returned, the handover request ack message
In carry the target eNB be the UE distribution the ascending resource information to send handoff completion message；And it is connecing
After the handover request ack message for receiving target eNB return, Xiang Suoshu UE sends switching command, indicates UE according in the switching
The ascending resource information that is carried in order, without go Target cell carry out random access channel RACH process instruction and
Timing Advance TA information come complete from source UMTS cell to the switching of target LTE cell access.
The first embodiment of UE provided in an embodiment of the present invention, as shown in Figure 10, comprising:
Isosystem measurement module 1001, for being carried out in universal mobile telecommunications service UMTS cell to the same station adjacent area LTE
Isosystem measurement, and isosystem measurement report is sent to source radio network controller RNC；
Receiving module 1002 carries target in the switching command for receiving the switching command of the source RNC transmission
Base station eNB be the UE distribution the ascending resource information to send handoff completion message, without go Target cell carry out with
The instruction and Timing Advance TA information of machine access channel RACH process；
Switching module 1003 is completed for the instruction according to the switching command from source UMTS cell to target LTE cell
Switching access.
Further, in the first possible embodiment of above-mentioned user equipment, receiving module 1003 is also used to work as institute
When stating UE in UMTS cell and being in dedicated transmission channel DCH state, the measurement control that source RNC is issued is received
Measurement Control message；The increased measurement Additional of the Measurement Control message
It include user's positioning measurement UE positioning measurement in measurement；
Above-mentioned isosystem measurement module 1001 is also used to carry out different system according to the Measurement Control message
Unified test amount, and report to the source RNC include UE Rx-Tx time difference and round trip time or
The isosystem measurement of extended round trip time is reported；Under the UE Rx-Tx time difference characterization UE
The row dedicated physical channel frames time of reception and special physical controlling channel of upward/uplink Dedicated Physical Data channel frame sending instant
Time difference；The round trip time or extendedround trip time characterization NB receives uplink Dedicated Physical control
The time difference at channel frame moment processed and NB downward special physical channel frame sending instant.
Further, it in the first possible embodiment of above-mentioned user equipment, carries in switching command without removing mesh
The No RACH that is designated as that mark cell carries out RACH process is indicated or with station instruction.
Second of embodiment of UE provided in an embodiment of the present invention, as shown in figure 11, comprising:
Processor 1101, for carrying out different system survey to the same station adjacent area LTE in universal mobile telecommunications service UMTS cell
Amount, and isosystem measurement report is sent to source radio network controller RNC；And the instruction according to the switching command, it completes
It is accessed from source UMTS cell to the switching of target LTE cell；
Transceiver 1102 carries target base in the switching command for receiving the switching command of the source RNC transmission
The eNB that stands is the ascending resource information to send handoff completion message of UE distribution, without going Target cell to carry out at random
Access the instruction and Timing Advance TA information of channel RACH process.
The network switching system of UMTS to LTE provided in an embodiment of the present invention a kind of, as shown in figure 12, comprising:
Radio network controller (RNC) 1201 is located in UMTS, includes same for what is issued according to user equipment (UE) 1202
The measurement report of the adjacent area LTE of standing is made after the switch decision of target LTE cell, is sent switching request to target BS eNB and is disappeared
Breath；The handover request ack message that target eNB is returned is received, carries the target eNB in the handover request ack message
For the ascending resource information to send handoff completion message of UE1202 distribution；Switching life is sent to the UE1202
It enables, the ascending resource information is carried in the switching command, without going Target cell to carry out random access channel RACH mistake
The instruction and Timing Advance TA information of journey；
UE1202 includes the measurement report with the station adjacent area LTE to the RNC1201 for sending, and receives the source
The switching command that RNC is sent, and according to the instruction of the switching command, it completes from source UMTS cell cutting to target LTE cell
Changing-over enters.
Method for switching network, equipment and the system of above-mentioned UMTS to LTE provided in an embodiment of the present invention, in the scene of co-sited
Under, source RNC contained into the switching command that UE is issued without go Target cell carry out RACH process instruction, also, due to
Pre-allocated the ascending resource that UE sends handoff completion message in advance, and defined the value of TA by source RNC in advance, by this three
Item content is all carried is handed down to UE in switching command, and UE can directly arrive Target cell progress after receiving switching command
Access shortens RACH process bring and interrupts time delay, while also saving without carrying out RACH process in Target cell
The related resource of RACH.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, those skilled in the art can carry out various modification and variations without departing from this hair to the embodiment of the present invention
The spirit and scope of bright embodiment.In this way, if these modifications and variations of the embodiment of the present invention belong to the claims in the present invention
And its within the scope of equivalent technologies, then the present invention is also intended to include these modifications and variations.
Claims (18)
1. the method for switching network of universal mobile telecommunications service UMTS to long term evolution LTE a kind of characterized by comprising
The measurement report comprising the same station adjacent area LTE that service wireless network controller RNC in source is issued according to user equipment (UE) in UMTS
Announcement is made after the switch decision of target LTE cell, sends switching request message to target BS eNB；
The source RNC receives the handover request ack message that target eNB is returned, and carries in the handover request ack message
State the ascending resource information to send handoff completion message that target eNB is UE distribution；
The source RNC sends switching command to the UE, and instruction UE is provided according to the uplink carried in the switching command
Source information, without going, Target cell carries out the instruction of random access channel RACH process and Timing Advance TA information is completed
It is accessed from source UMTS cell to the switching of target LTE cell；The TA information is obtained for the source RNC by following manner: institute
State source RNC by the UE in UMTS cell when the propagation delay time of UE to base station NB that is got by RACH process be converted to institute
State the value of TA.
2. the method as described in claim 1, which is characterized in that the propagation delay time of UE to NB is when the UE is in UMTS cell
The propagation delay time Propagation Delay parameter or extension propagation delay time Extended of the side the source RNC
Propagation Delay parameter.
3. method according to claim 1 or 2, which is characterized in that carried in the switching command without removing Target cell
Carry out RACH process is designated as No RACH instruction or with station instruction.
4. the method for switching network of universal mobile telecommunications service UMTS to long term evolution LTE a kind of characterized by comprising
The measurement report comprising the same station adjacent area LTE that service wireless network controller RNC in source is issued according to user equipment (UE) in UMTS
Announcement is made after the switch decision of target LTE cell, sends switching request message to target BS eNB；
The source RNC receives the handover request ack message that target eNB is returned, and carries in the handover request ack message
State the ascending resource information to send handoff completion message that target eNB is UE distribution；
The source RNC sends switching command to the UE, and instruction UE is provided according to the uplink carried in the switching command
Source information, without going, Target cell carries out the instruction of random access channel RACH process and Timing Advance TA information is completed
It is accessed from source UMTS cell to the switching of target LTE cell；
The TA information is that the source RNC is obtained by following manner: the source RNC is in UE in UMTS cell and in dedicated
When transmission channel DCH state, it is sent to it isosystem measurement control Measurement Control message, the measurement control
It include user's positioning measurement UE positioning measurement in message；The source RNC receives the different system that UE is sent
System measurement report obtains the value and round trip of UE Rx-Tx time difference from isosystem measurement report
The value of time or extended round trip time；The source RNC calculates UE in UMTS cell according to following formula
When UE to NB propagation delay time value, then convert the value of the calculated propagation delay time to the value of TA: UE is in UMTS cell
The propagation delay time of UE to NB=(round trip time or extended round trip time-UE Rx-Tx when interior
time difference)/2；The UE Rx-Tx time difference is that characterization UE downward special physical channel frame receives
Moment and special physical controlling channel of upward/uplink Dedicated Physical Data channel frame sending instant time difference；
Round trip time or extended the round trip time is that characterization NB receives uplink Dedicated Physical control
The time difference at channel frame moment and NB downward special physical channel frame sending instant.
5. method as claimed in claim 4, which is characterized in that source RNC sends isosystem measurement control message to UE, comprising:
The source RNC configures increased measurement Additional measurement in measurement control message, described
It include UE positioning measurement in Additional measurement；
The source RNC issues the isosystem measurement control message to UE.
6. the method for switching network of universal mobile telecommunications service UMTS to long term evolution LTE a kind of characterized by comprising
User equipment (UE) is sent in UMTS cell comprising the measurement report with the station adjacent area LTE to source radio network controller RNC；
The UE receives the switching command that the source RNC is sent, and it is the UE that target BS eNB is carried in the switching command
Distribution the ascending resource information to send handoff completion message, without go Target cell carry out random access channel RACH mistake
The instruction and Timing Advance TA information of journey；
The UE completes to access from source UMTS cell to the switching of target LTE cell according to the instruction of the switching command；
The TA information be the source RNC by following manner acquisition: the source RNC by the UE in UMTS cell when pass through
The propagation delay time for UE to the NB that RACH process is got is converted to the value of the TA.
7. method as claimed in claim 6, which is characterized in that the propagation delay time of UE to NB is when the UE is in UMTS cell
The propagation delay time Propagation Delay parameter or extension propagation delay time Extended Propagation of the source side RNC
Delay parameter.
8. method according to claim 6 or 7, which is characterized in that in the switching command carry without go Target cell into
Row RACH process is designated as No RACH instruction or with station instruction.
9. the method for switching network of universal mobile telecommunications service UMTS to long term evolution LTE a kind of characterized by comprising
User equipment (UE) is sent in UMTS cell comprising the measurement report with the station adjacent area LTE to source radio network controller RNC；
The UE receives the switching command that the source RNC is sent, and it is the UE that target BS eNB is carried in the switching command
Distribution the ascending resource information to send handoff completion message, without go Target cell carry out random access channel RACH mistake
The instruction and Timing Advance TA information of journey；
The UE completes to access from source UMTS cell to the switching of target LTE cell according to the instruction of the switching command；
The UE receives the measurement control that source RNC is issued in UMTS cell and when being in dedicated transmission channel DCH state
Measurement Control message, the increased measurement Additional of the Measurement Control message
It include user's positioning measurement UE positioning measurement in measurement；The UE is according to
Measurement Control message carries out isosystem measurement, and reporting to the source RNC includes UE Rx-Tx time
The isosystem measurement of difference and round trip time or extended round trip time is reported；
The value of TA in the received switching command of UE is obtained by following manner:
The value of the propagation delay time of UE to NB when the source RNC calculates UE in UMTS cell according to following formula, then will calculate
The value of the propagation delay time out is converted into TA value:
The propagation delay time of UE to NB=(round trip time or extended round trip when UE is in UMTS cell
time-UE Rx-Tx time difference)/2；
The UE Rx-Tx time difference characterization UE downward special physical channel frame time of reception and the dedicated object of uplink
Manage control channel/uplink Dedicated Physical Data channel frame sending instant time difference；
Round trip time or extended round trip time the characterization NB receives uplink Dedicated Physical control letter
Road frame and NB send the time difference of downward special physical channel frame.
10. method as claimed in claim 9, which is characterized in that carry in the switching command without going Target cell to carry out
RACH process is designated as No RACH instruction or with station instruction.
11. a kind of radio network controller (RNC) is located at universal mobile telecommunications service UMTS network characterized by comprising
Switch decision module, for being issued in the user equipment (UE) for receiving its administration comprising with the station adjacent area long term evolution LTE
Measurement report makes switch decision of the UE to target LTE cell；
Sending module, for sending and switching to target BS eNB after making switch decision of the UE to target LTE cell
Request message；And after the handover request ack message that receiving module receives target eNB return, Xiang Suoshu UE sends switching
Order, instruction UE according to the ascending resource information carried in the switching command, without go Target cell carry out random access
The instruction of channel RACH process and Timing Advance TA information are completed to connect from source UMTS cell to the switching of target LTE cell
Enter；
Receiving module carries in the handover request ack message for receiving the handover request ack message of target eNB return
Having the target eNB is the ascending resource information to send handoff completion message of UE distribution；
TA data obtaining module, the UE got when for by the UE in UMTS cell by RACH process is to base station NB's
Propagation delay time is converted to the value of the TA.
12. RNC as claimed in claim 11, which is characterized in that the propagation delay time of UE to NB when the UE is in UMTS cell
For the propagation delay time Propagation Delay parameter or extension propagation delay time Extended of the side RNC
Propagation Delay parameter.
13. the RNC as described in claim 11 or 12, which is characterized in that carried in the switching command without going target small
The No RACH that is designated as that area carries out RACH process is indicated or with station instruction.
14. a kind of radio network controller (RNC) is located at universal mobile telecommunications service UMTS network characterized by comprising
Switch decision module, for being issued in the user equipment (UE) for receiving its administration comprising with the station adjacent area long term evolution LTE
Measurement report makes switch decision of the UE to target LTE cell；
Sending module, for sending and switching to target BS eNB after making switch decision of the UE to target LTE cell
Request message；And after the handover request ack message that receiving module receives target eNB return, Xiang Suoshu UE sends switching
Order, instruction UE according to the ascending resource information carried in the switching command, without go Target cell carry out random access
The instruction of channel RACH process and Timing Advance TA information are completed to connect from source UMTS cell to the switching of target LTE cell
Enter；
Receiving module carries in the handover request ack message for receiving the handover request ack message of target eNB return
Having the target eNB is the ascending resource information to send handoff completion message of UE distribution；
The sending module is also used in UE in UMTS cell and when being in dedicated transmission channel DCH state, is sent to it different
Systematic survey controls Measurement Control message, includes user's positioning measurement UE in the measurement control message
Positioning measurement；
The receiving module is also used to receive the isosystem measurement report of UE transmission；
TA data obtaining module, for obtaining the value of UE Rx-Tx time difference from isosystem measurement report
With the value of round trip time or extended round trip time；And UE is calculated in UMTS according to following formula
The value of the propagation delay time of UE to NB when in cell, then convert the value of the calculated propagation delay time to the value of TA: UE exists
The propagation delay time of UE to NB=(round trip time or extended round trip time-UE when in UMTS cell
Rx-Tx time difference)/2；The UE Rx-Tx time difference characterizes UE downward special physical channel frame
The time of reception and special physical controlling channel of upward/uplink Dedicated Physical Data channel frame sending instant time difference；It is described
Round trip time or extended round trip time characterization NB receives the special physical controlling channel of upward frame moment
With the time difference of NB downward special physical channel frame sending instant.
15. RNC as claimed in claim 14, which is characterized in that the sending module is specifically used in measurement control message
Increased measurement Additional measurement is configured, includes described in described Additional measurement
UE positioning measurement；The isosystem measurement control message is issued to UE.
16. a kind of user equipment (UE) characterized by comprising
Isosystem measurement module, for carrying out different system survey to the same station adjacent area LTE in universal mobile telecommunications service UMTS cell
Amount, and isosystem measurement report is sent to source radio network controller RNC；
Receiving module carries target BS eNB in the switching command for receiving the switching command of the source RNC transmission
For the ascending resource information to send handoff completion message of UE distribution, without going Target cell to carry out random access letter
The instruction and Timing Advance TA information of road RACH process；
Wherein, the TA information be according to UE in UMTS cell when UE to NB propagation delay time determined by, the UE exists
The propagation delay time of UE to NB=(round trip time or extended round trip time-UE when in UMTS cell
Rx-Tx time difference)/2；The UE Rx-Tx time difference characterizes UE downward special physical channel frame
The time of reception and special physical controlling channel of upward/uplink Dedicated Physical Data channel frame sending instant time difference；It is described
Round trip time or extended round trip time characterization NB receives the special physical controlling channel of upward frame moment
With the time difference of NB downward special physical channel frame sending instant；
Switching module, for the instruction according to the switching command, completion connects from source UMTS cell to the switching of target LTE cell
Enter；
The receiving module is also used to receive source as the UE in UMTS cell and when being in dedicated transmission channel DCH state
The measurement that RNC is issued controls Measurement Control message；The Measurement Control message it is increased
It include user's positioning measurement UE positioning measurement in measurement Additional measurement；
The isosystem measurement module is also used to carry out isosystem measurement according to the Measurement Control message, and
Reporting to the source RNC includes UE Rx-Tx time difference and round trip time or extended
The isosystem measurement of round trip time is reported；The UE Rx-Tx time difference characterizes UE downlink dedicated object
Manage the channel frame time of reception and special physical controlling channel of upward/uplink Dedicated Physical Data channel frame sending instant time
Difference；Round trip time or extended round trip time the characterization NB receives uplink Dedicated Physical control letter
The time difference at road frame moment and NB downward special physical channel frame sending instant.
17. UE as claimed in claim 16, which is characterized in that carry in the switching command without going Target cell to carry out
RACH process is designated as No RACH instruction or with station instruction.
18. the network switching system of universal mobile telecommunications service UMTS to long term evolution LTE a kind of characterized by comprising
Radio network controller (RNC) is located in UMTS, the survey comprising the same station adjacent area LTE for being issued according to user equipment (UE)
Amount report is made after the switch decision of target LTE cell, sends switching request message to target BS eNB；Receive target eNB
The handover request ack message of return, it is UE distribution that the target eNB is carried in the handover request ack message
To send the ascending resource information of handoff completion message；Switching command is sent to the UE, is carried in the switching command
The ascending resource information, the instruction without going Target cell progress random access channel RACH process and Timing Advance TA
Information；
UE includes the measurement report with the station adjacent area LTE to the RNC for sending, and receives the switching that the source RNC is sent
Order, and according to the instruction of the switching command, it completes to access from source UMTS cell to the switching of target LTE cell；
Wherein, the TA information is that the source RNC is obtained by following manner: the source RNC is by the UE in UMTS cell
When the propagation delay time of UE to base station NB that is got by RACH process be converted to the value of the TA；
Alternatively, the TA information is that the source RNC is obtained by following manner: the source RNC in UMTS cell and locates in UE
When dedicated transmission channel DCH state, it is sent to it isosystem measurement control Measurement Control message, the survey
Measure includes user's positioning measurement UEpositioning measurement in control message；The source RNC receives what UE was sent
Isosystem measurement report obtains the value and round of UE Rx-Tx time difference from isosystem measurement report
The value of trip time or extended round trip time；It is small in UMTS that the source RNC according to following formula calculates UE
The value of the propagation delay time of UE to NB when in area, then convert the value of the calculated propagation delay time to the value of TA: UE is in UMTS
The propagation delay time of UE to NB=(round trip time or extended round trip time-UE Rx-Tx when in cell
time difference)/2；The UE Rx-Tx time difference is that characterization UE downward special physical channel frame receives
Moment and special physical controlling channel of upward/uplink Dedicated Physical Data channel frame sending instant time difference；
Round trip time or extended the round trip time is that characterization NB receives uplink Dedicated Physical control
The time difference at channel frame moment and NB downward special physical channel frame sending instant.
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| PCT/CN2013/080903 WO2015017977A1 (en) | 2013-08-06 | 2013-08-06 | Umts-to-lte network handover method, device and system |
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| EP3550887B1 (en) | 2015-05-27 | 2023-08-16 | Huawei Technologies Co., Ltd. | User equipment handover method, and device |
| KR102133899B1 (en) * | 2016-04-01 | 2020-07-15 | 텔레호낙티에볼라게트 엘엠 에릭슨(피유비엘) | Method and device for resource configuration in handover |
| CN110475283B (en) * | 2018-05-11 | 2021-06-15 | 维沃移动通信有限公司 | Method, device and system for processing CSI processing unit and resources |
| CN110958670A (en) * | 2018-09-27 | 2020-04-03 | 海信集团有限公司 | Uplink data transmission method, user terminal and network side equipment |
| CN112350808B (en) * | 2019-08-06 | 2022-04-05 | 华为技术有限公司 | Method and device for signal transmission |
| WO2024092600A1 (en) * | 2022-11-03 | 2024-05-10 | Qualcomm Incorporated | Layer 1 and layer 2 handover procedures |
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| CN101370267A (en) * | 2007-08-19 | 2009-02-18 | 中兴通讯股份有限公司 | Switching method for mobile communication system |
| CN101998553A (en) * | 2009-08-14 | 2011-03-30 | 大唐移动通信设备有限公司 | Uplink resource allocating method and equipment |
| WO2011066797A1 (en) * | 2009-12-03 | 2011-06-09 | 华为技术有限公司 | Method and system for accessing network |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015017977A1 (en) | 2015-02-12 |
| CN104521252A (en) | 2015-04-15 |
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