CN101188848B - A method and system for frequency point transfer - Google Patents
A method and system for frequency point transfer Download PDFInfo
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- CN101188848B CN101188848B CN200610114560A CN200610114560A CN101188848B CN 101188848 B CN101188848 B CN 101188848B CN 200610114560 A CN200610114560 A CN 200610114560A CN 200610114560 A CN200610114560 A CN 200610114560A CN 101188848 B CN101188848 B CN 101188848B
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Abstract
The invention discloses a method and a system for transferring a subsidiary carrier wave frequency point in a TD-SCDMA system. The invention is used for solving the problem in the prior art that an easy cut wireless link is existed when the frequency point transfers to cause the user equipment to be cut off. In the method, a wireless network controller indicates a base station to transfer a certain carrier wave to an appointed second frequency point from a first frequency point at the appointed time; the base station sends responsive information to the wireless network controller; after the wireless network controller receives the responsive information accepting the indication sent by the base station, the user equipment on the subsidiary carrier wave transfers the used physical resource from the first frequency point to the appointed second frequency point at the appointed time; the base station and the user equipment transfer the subsidiary carrier wave to the second frequency point respectively according to the appointed time. The system comprises the wireless network controller, the base station and the user equipment.
Description
Technical field
The present invention relates to wireless communication field, particularly under the situation that keeps Radio Link, adjust the method and system of frequency.
Background technology
In multiple frequency spot TD-SCDMA system, the demand of optimization Network Based reduces the interference of neighbor cell, often needs the frequency at the auxilliary carrier wave place of some sub-district is moved, in moving process, other resource such as time slot locking, the time slot direction etc. of auxilliary carrier wave remain unchanged.
Prior art need realize the transfer of subdistrict frequency point by twice cell re-configuration process of putting at present, referring to basic procedure shown in Figure 1.Cite an actual example, sub-district A is 3 carrier cells, and its main carrier 1 is at frequency 1, and auxilliary carrier wave 2 and 3 is respectively at frequency 2, frequency 3, in the operate as normal of sub-district, 3 frequencies all insert subscriber equipment (User Equipment, UE).When interference problems such as generation neighbor cell, radio network controller (Radio Network Controller RNC) need adjust to frequency 4 from frequency 3 with the auxilliary carrier wave 3 of sub-district A, and method step is as follows:
Step 101: radio network controller sends cell re-configuration and puts command messages (CELLRECONFIGURATION REQUEST) to the base station (Node B), requires its deletion frequency 3.
Step 102: the base station receives deletion frequency 3 after the message, and sends cell re-configuration and put response message (CELL RECONFIGURATON RESPONSE) and give radio network controller, and frequency 3 is successfully deleted in expression.
Step 103: radio network controller sends cell re-configuration once more and puts command messages, requires the base station to increase frequency 4.
Step 104: the base station receives the order back increases frequency 4, and sends cell re-configuration once more and put response message to radio network controller, and expression successfully increases frequency 4.
During this period, if radio network controller does not carry out any processing to subscriber equipment,, then must cause the subscriber equipment call drop because the frequency resource that subscriber equipment uses does not exist at network side.Radio network controller takes some modes to avoid call drop at present, a kind of mode is frequency 2 or the frequency 1 that radio network controller is adjusted to the subscriber equipment of frequency 3 this sub-district, this adjusts very possible because frequency 2 and frequency 1 do not have enough resources and can't carry out, and causes subscriber equipment generation call drop; Another kind of mode is that radio network controller is adjusted to other sub-district with the subscriber equipment on the frequency 3, and this adjusts very possible because other sub-district covers here or other local resource is full and can't not carry out, and causes subscriber equipment generation call drop equally.And other resource on this auxilliary carrier wave has also been deleted in the base station in the deletion frequency, as time slot locking, time slot direction etc., can't guarantee that the connected sum of transfer of data is stable, and need rebulid other resource on the auxilliary carrier wave when increasing frequency.
Summary of the invention
The invention provides a kind of method and system of frequency point transfer, when frequency shifts, have the problem that Radio Link (RL) causes subscriber equipment generation call drop that easily disconnects in the prior art in order to solve.
The invention provides following technical scheme:
A kind of method of frequency point transfer may further comprise the steps:
Radio network controller indication base station is transferred to a certain auxilliary carrier wave on second frequency of appointment at the time point of appointment from first frequency;
Described radio network controller indicates the subscriber equipment on the described auxilliary carrier wave to transfer to frequency on second frequency of appointment from first frequency at the time point of appointment after receiving that the response message of indication is accepted in the base station;
Base station and subscriber equipment are transferred to second frequency according to the time point of appointment with described auxilliary carrier wave respectively.
Radio network controller is put message indication base station by the cell re-configuration after expanding and is carried out the frequency transfer, and wherein, this message comprises time point, the first frequency position and the second frequency position of appointment.
Described response message comprises the response message of accepting indication and the response message of refusing to accept indication.
After the response message of accepting indication was sent to radio network controller in the base station, the described auxilliary carrier wave of at the appointed time naming a person for a particular job was transferred on second frequency of appointment from first frequency.
The base station keeps auxilliary carrier wave other resource except that frequency constant in the frequency transfer process.
Radio network controller is behind the response message of the acceptance indication of receiving the base station, using the subscriber equipment of this auxilliary carrier wave to carry out frequency by the indication of physical channel reconfiguration message shifts, wherein, this physical channel reconfiguration message comprises time point, the second frequency position of appointment.
Subscriber equipment shifts successfully at frequency, and the back returns success response message to radio network controller.
Radio network controller is that base station and subscriber equipment are specified point at the same time, perhaps, is that different time points is specified with subscriber equipment in the base station allowing in the time period that postpones.
Frequency point transfer in the time period that subscriber equipment allows to postpone behind the time point of appointment.
Described subscriber equipment is shifting other physical resource with frequency translation in second frequency of appointment.
A kind of communication system comprises:
Radio network controller, be used to indicate the base station a certain auxilliary carrier wave to be transferred to second frequency of appointment from first frequency, and after receiving the response message of accepting to shift in the base station, indicate the subscriber equipment that uses described auxilliary carrier wave frequency translation to be arrived second frequency of appointment at the time point of appointment at the time point of appointment;
The base station is used at the time point of appointment described auxilliary carrier wave being transferred to from first frequency second frequency of appointment;
Subscriber equipment is used for according to the time point of appointment second frequency of frequency translation to appointment.
Described response message comprises the response message of accepting indication and the response message of refusing to accept indication.
Described radio network controller is put message indication base station by the cell re-configuration after expanding and is carried out the frequency transfer, and wherein, this message comprises time point, the first frequency position and the second frequency position of appointment.
Radio network controller is behind the response message of the acceptance indication of receiving the base station, using the subscriber equipment of this auxilliary carrier wave to carry out frequency by the indication of physical channel reconfiguration message shifts, wherein, this physical channel reconfiguration message comprises the time point and the second frequency position of appointment.
Described subscriber equipment is shifting other physical resource with frequency translation in second frequency of appointment.
Beneficial effect of the present invention is as follows:
1, the present invention puts in the message at cell re-configuration increases frequency transfer time, former frequency position and new frequency positional information, make the base station after receiving message, will assist carrier wave and transfer on the frequency of appointment, and the base station keeps other resources of auxilliary carrier wave constant in the time of appointment.
2, radio network controller utilizes physical channel to reshuffle the subscriber equipment that this auxilliary carrier wave is used in indication, carves at the same time and carries out the frequency transfer, has avoided the call drop phenomenon, has kept the connection of Radio Link by the co-operating of base station, subscriber equipment.
3, subscriber equipment no longer needs to take the frequency resource of this sub-district or neighbor cell in the frequency transfer process, thereby has saved Internet resources for this sub-district or neighbor cell, improves network carrying ability.
4, the successful transfer of frequency has reduced the interference from neighbor cell, and then has improved user's speech quality.
5, the present invention has guaranteed that when successfully shifting subdistrict frequency point other resource such as time slot locking, time slot direction is constant on the auxilliary carrier wave, makes communication network more stable.
Description of drawings
The method flow diagram that Fig. 1 shifts for the prior art intermediate-frequeney point;
Fig. 2 is communication system architecture figure in the embodiment of the invention;
The method flow diagram that Fig. 3 shifts for embodiment of the invention intermediate-frequeney point;
Fig. 4 is the flow chart of frequency transfer method preferable in the embodiment of the invention.
Embodiment
Have the problem that easily disconnects Radio Link (RL) in the prior art in order to solve when frequency shifts, the present invention makes the same time frequency point transfer of base station and subscriber equipment by the adjustment time point is set.
Referring to Fig. 2, communication system comprises radio network controller 201, base station 202 and subscriber equipment 203 in the present embodiment.
It is as shown in the table that cell re-configuration after the expansion is put the form of command messages:
| IE/Group Name (cell/group name) | Presence (going out present condition) | Range (expansion) | IE Type and Reference (IE type) | Semantics Description (semantic description) | Criticality (importance) | Assigned Criticality (whether refusing after makeing mistakes) |
| Message Discriminator message is differentiated | M (essential) | 9.2.1.45 | - | |||
| Message Type type of message | M (essential) | 9.2.1.46 | YES (being) | Reject (refusal) | ||
| The mutual sign indicating number of Transacrion ID | M (essential) | 9.2.1.62 | - | |||
| The C-ID cell code | M (essential) | 9.2.1.9 | YES (being) | Reject (refusal) | ||
| Configuration Generation ID configuration produces sign indicating number | M (essential) | 9.2.1.16 | YES (being) | Reject (refusal) | ||
| SFN (time point of frequency shift adopts System Frame Number to represent) | O (optional) | 9.2.1.53A | YES (being) | Reject (refusal) | ||
| Ommit (, omitting) with existing identical |
| IE/Group Name (cell/group name) | Presence (going out present condition) | Range (expansion) | IE Type and Reference (IE type) | Semantics Description (semantic description) | Criticality (importance) | Assigned Criticality (whether refusing after makeing mistakes) |
| CHOICE UARFCN Adjustment channel is adjusted option | O (optional) | Applicable to 1.28Mcps TDD when using multiple frequencies is applied in 1.28M time-division system multi-frequency-point community | YES (being) | Reject (refusal) | ||
| ＞Add (increase) | - | |||||
| Ommit (, omitting) with existing identical | ||||||
| ＞Modify (modification) | - | |||||
| Ommit (, omitting) with existing identical | ||||||
| ＞Delete (deletion) | - | |||||
| Ommit (, omitting) with existing identical | ||||||
| ＞Modify Freq (change frequency) |
| IE/Group Name (cell/group name) | Presence (going out present condition) | Range (expansion) | IE Type and Reference (IE type) | Semantics Description (semantic description) | Criticality (importance) | Assigned Criticality (whether refusing after makeing mistakes) |
| The OLD UARFCN of＞＞＞(old frequency positional information) | M (essential) | 9.2.1.65 | Corresponds to Nt (3GPP TS 25.105) This IE indicates the frequency of Secondary Frequency to change corresponding with Nt (3GPP TS 25.105), this information unit need in the auxilliary frequency to represent the frequency that changes | - | ||
| The New UARFCN of＞＞＞(new frequency positional information) | M (essential) | 9.2.1.65 | Corresponding and the Nt (3GPP TS 25.105) of Corresponds to Nt (3GPP TS 25.105) This IE indicates the frequency of Secondary Frequency should be., this information unit is represented the target frequency that the preparation in the auxilliary frequency is adjusted to | - |
The message that base station 202 receives and response radio network controller 201 sends is at the time of appointment frequency point transfer.
SFN, OLD UARFCN and New UARFCN field in the last table are new field, other field is identical with former message, and wherein, SFN represents the time point that frequency shifts, OLD UARFCN represents former frequency positional information, and New UARFCN is the positional information of the new frequency transferred to.
Physical channel reconfiguration message no change does not repeat them here.
Continue to use foregoing example that the method that the present embodiment intermediate-frequeney point shifts is described, referring to shown in Figure 3, idiographic flow is as follows:
Step 301: radio network controller 201 is according to the needs of Network Transmission quality, sends cell re-configuration after the expansion and puts command messages to the base station 202, requires base station 202 in time T the frequency of the auxilliary carrier wave 3 of sub-district to be transferred to frequency 4 from frequency 3.
Step 302: base station 202 is replied cell re-configuration and is put response message after the cell re-configuration of receiving radio network controller 201 transmissions is put command messages, expression receives that successfully cell re-configuration puts command messages, and base station 202 by this message informing radio network controller 201 its whether at the appointed time T carry out frequency and shift, if can, then continue step 303, otherwise radio network controller 201 these frequencies of cancellation shift.
Step 303: after receiving the response message that base station 202 is accepted to shift, radio network controller 201 sends the physical channel reconfiguration message to subscriber equipment 203, wherein carries time and new frequency positional information that frequency shifts, requires subscriber equipment 203 in time T
1The physical resource of its use is transferred to frequency 4 from frequency 3.
Step 304: base station 202 is transferred to frequency 4 with the frequency of the auxilliary carrier wave 3 in sub-district from frequency 3 in the time T of appointment, and other resource of this auxilliary carrier wave remains unchanged, and other resource is as the RL of carrying, time slot state etc.
Step 305: subscriber equipment 203 is in the time T of appointment
1The physical resource of its use is transferred to frequency 4 from frequency 3.
Perhaps subscriber equipment 203 is owing to Transmission Time Interval (TTI) and in time T
1After one section network in time period of allowing to postpone, the physical resource of its use is transferred to frequency 4 from frequency 3, this time period generally is not more than 70ms.
T and T
1Can be in full accord, also can because cordless communication network allows certain delay,, keep the connection of Radio Link apart from the time of 10ms magnitude so the scheme that provides in the present embodiment can be avoided the call drop phenomenon.
Step 306: subscriber equipment 203 is replied physical channels by base station 202 to radio network controller 201 and is reshuffled and finish message behind successful frequency point transfer, notice radio network controller 201 frequencies shift successfully.
Best situation is T and T
1Identical, and subscriber equipment 203 and base station 202 frequency point transfer at the appointed time accurately.Referring to Fig. 4, concrete grammar is as follows:
Step 401: neighbor cell interference takes place, radio network controller 201 needs to change the tranmitting frequency of this sub-district, send cell re-configuration after the expansion and put command messages to the base station 202, the frequency that requires base station 202 in time T carrier wave 3 to be assisted in the sub-district is transferred to frequency 4 from frequency 3.
Step 402: base station 202 is returned cell re-configuration and is put response message after the cell re-configuration of receiving radio network controller 201 transmissions is put message, expression receives that successfully cell re-configuration puts message, and base station 202 by this message informing radio network controller 201 its whether at the appointed time T carry out frequency and shift, if can, then continue step 403, otherwise radio network controller 201 these frequencies of cancellation shift.
Step 403: radio network controller 201 sends the physical channel reconfiguration message by base station 202 to subscriber equipment 203, wherein carry time and new frequency positional information that frequency shifts, require subscriber equipment 203 physical resource of its use to be transferred to frequency 4 from frequency 3 in time T.
Step 404: the frequency transfer is carried out at the time point T of appointment simultaneously in subscriber equipment 203 and base station 202, and base station 202 keeps other resource of these auxilliary carrier waves constant.
Step 405: subscriber equipment 203 returns physical channel by base station 202 to radio network controller 201 and reshuffles and finish message (Physical Channel ReconfigurationComplete) behind successful frequency point transfer, and notice radio network controller 201 frequencies shift successfully.
The present invention puts in the message at cell re-configuration increases frequency transfer time, former frequency position and new frequency positional information, and base station time in appointment after receiving message is transferred to frequency on the appointed positions.Radio network controller utilizes physical channel to reshuffle the subscriber equipment that this auxilliary carrier wave is used in indication, carries out frequency at synchronization and shifts, and has avoided the call drop phenomenon, has kept the connection of Radio Link by the co-operating of base station, subscriber equipment.Subscriber equipment no longer needs to take the frequency resource of this sub-district or neighbor cell in the frequency transfer process, thereby has saved Internet resources for this sub-district or neighbor cell, improves network carrying ability.The successful transfer of frequency has reduced the interference from neighbor cell, and then has improved user's speech quality.The present invention has guaranteed that when successfully shifting subdistrict frequency point other resources such as time slot locking, time slot direction are constant, makes communication network more stable.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (15)
1. the method for a frequency point transfer is used for TDD-CDMA system, it is characterized in that, this method may further comprise the steps:
Radio network controller indication base station is transferred to a certain auxilliary carrier wave on second frequency of appointment at the time point of appointment from first frequency;
Described radio network controller indicates the subscriber equipment on the described auxilliary carrier wave to transfer to frequency on second frequency of appointment from first frequency at the time point of appointment after receiving that the response message of indication is accepted in the base station;
Base station and subscriber equipment are transferred to second frequency according to the time point of appointment with described auxilliary carrier wave respectively.
2. the method for frequency point transfer as claimed in claim 1, it is characterized in that, radio network controller is put message indication base station by the cell re-configuration after expanding and is carried out the frequency transfer, wherein, the cell re-configuration after this expansion is put time point, the first frequency position and the second frequency position that message comprises appointment.
3. the method for frequency point transfer as claimed in claim 1 is characterized in that, described response message comprises the response message of accepting indication and the response message of refusing to accept indication.
4. the method for frequency point transfer as claimed in claim 3 is characterized in that, after the response message of accepting indication was sent to radio network controller in the base station, the described auxilliary carrier wave of at the appointed time naming a person for a particular job was transferred on second frequency of appointment from first frequency.
5. the method for frequency point transfer as claimed in claim 4 is characterized in that, the base station keeps auxilliary carrier wave other resource except that frequency constant in the frequency transfer process.
6. the method for frequency point transfer as claimed in claim 1, it is characterized in that, radio network controller is behind the response message of the acceptance indication of receiving the base station, using the subscriber equipment of this auxilliary carrier wave to carry out frequency by the indication of physical channel reconfiguration message shifts, wherein, this physical channel reconfiguration message comprises time point, the second frequency position of appointment.
7. the method for frequency point transfer as claimed in claim 1 is characterized in that, subscriber equipment returns success response message to radio network controller after frequency shifts successfully.
8. the method for frequency point transfer as claimed in claim 1 is characterized in that, radio network controller is that base station and subscriber equipment are specified point at the same time, perhaps, is that different time points is specified with subscriber equipment in the base station allowing in the time period that postpones.
9. as the method for each described frequency point transfer in the claim 1 to 8, it is characterized in that frequency point transfer in the time period that subscriber equipment allows to postpone behind the time point of appointment.
10. the method for frequency point transfer as claimed in claim 1 is characterized in that, described subscriber equipment is shifting other physical resource with frequency translation in second frequency of appointment.
11. a communication system is characterized in that, comprising:
Radio network controller, be used to indicate the base station a certain auxilliary carrier wave to be transferred to second frequency of appointment from first frequency, and after receiving the response message of accepting to shift in the base station, indicate the subscriber equipment that uses described auxilliary carrier wave frequency translation to be arrived second frequency of appointment at the time point of appointment at the time point of appointment;
The base station is used at the time point of appointment described auxilliary carrier wave being transferred to from first frequency second frequency of appointment;
Subscriber equipment is used for according to the time point of appointment second frequency of frequency translation to appointment.
12. communication system as claimed in claim 11 is characterized in that, described response message comprises the response message of accepting indication and the response message of refusing to accept indication.
13. communication system as claimed in claim 11, it is characterized in that, described radio network controller is put message indication base station by the cell re-configuration after expanding and is carried out the frequency transfer, wherein, the cell re-configuration after this expansion is put time point, the first frequency position and the second frequency position that message comprises appointment.
14. communication system as claimed in claim 11, it is characterized in that, radio network controller is behind the response message of the acceptance indication of receiving the base station, using the subscriber equipment of this auxilliary carrier wave to carry out frequency by the indication of physical channel reconfiguration message shifts, wherein, this physical channel reconfiguration message comprises the time point and the second frequency position of appointment.
15., it is characterized in that described subscriber equipment is shifting other physical resource with frequency translation as each described communication system in the claim 11 to 14 in second frequency of appointment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200610114560A CN101188848B (en) | 2006-11-15 | 2006-11-15 | A method and system for frequency point transfer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610114560A CN101188848B (en) | 2006-11-15 | 2006-11-15 | A method and system for frequency point transfer |
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| CN101188848A CN101188848A (en) | 2008-05-28 |
| CN101188848B true CN101188848B (en) | 2010-05-12 |
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| CN200610114560A Active CN101188848B (en) | 2006-11-15 | 2006-11-15 | A method and system for frequency point transfer |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103281782B (en) | 2009-01-23 | 2016-08-24 | 华为技术有限公司 | Uplink carrier frequencies management method, equipment and system |
| CN102065496B (en) * | 2009-11-13 | 2013-09-18 | 中国移动通信集团公司 | Switching method and system in femto district as well as user terminal and family base station |
| CN102572975B (en) * | 2010-12-31 | 2015-08-19 | 中国移动通信集团公司 | A kind of method of switching operating frequency of cells, system and equipment |
| CN104041101A (en) * | 2012-12-26 | 2014-09-10 | 华为技术有限公司 | Cell management method and system |
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| CN1354582A (en) * | 2000-11-20 | 2002-06-19 | 索尼国际(欧洲)股份有限公司 | Adaptive subcarrier loading method and equipment |
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2006
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| CN1354582A (en) * | 2000-11-20 | 2002-06-19 | 索尼国际(欧洲)股份有限公司 | Adaptive subcarrier loading method and equipment |
| CN1788517A (en) * | 2003-05-12 | 2006-06-14 | 松下电器产业株式会社 | Method and apparatus for performing inter-frequency measurements |
| CN1717092A (en) * | 2004-06-29 | 2006-01-04 | 中兴通讯股份有限公司 | Method for dynamically regulating auxiliary carrier frequency of multiple carrier frequency small village in radio communication system |
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