CN102378296B - Method for carrying out frequency band switching in communication system - Google Patents
Method for carrying out frequency band switching in communication system Download PDFInfo
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- CN102378296B CN102378296B CN 201010252631 CN201010252631A CN102378296B CN 102378296 B CN102378296 B CN 102378296B CN 201010252631 CN201010252631 CN 201010252631 CN 201010252631 A CN201010252631 A CN 201010252631A CN 102378296 B CN102378296 B CN 102378296B
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Abstract
The invention provides a method for carrying out frequency band switching in a communication system, wherein a control channel of the communication system takes up a part of frequency bands of a whole system bandwidth, and the control channel currently takes up a first frequency band. The method comprises the following steps that: a base station sends a control message to a terminal on a first frequency band and a second frequency band until a confirmation message fed back by the terminal is received; the control message instructs the terminal to switch the control channel from the first frequency band to the second frequency band; and the confirmation message instructs the terminal that the control message is received correctly. By using the method provided by the invention, the frequency band switching reliability of the terminal can be improved.
Description
Technical field
The present invention relates to communication technical field, relate in particular to the method for carrying out frequency band switching in a kind of communication system.
Background technology
In Long Term Evolution (Long Term Evolution, LTE) communication system, control information is transmitted on the whole system bandwidth, and business information is transmitted on the partial-band of system bandwidth.Before base station and terminal communicated, terminal can be distributed to the partial-band of whole system bandwidth in the base station, and then terminal utilizes these frequency bands to come transmitting and receiving service information.When the decline of transmitting on these frequency bands when business information was larger, the base station sent control information to terminal, and notification terminal switches on other frequency bands of better performances, thereby guaranteed that base station and communicating by letter of terminal remain a performance preferably.
Fig. 1 is that the LTE system carries out the method flow diagram that frequency band switches.
As shown in Figure 1, the method comprises:
Expected results wherein refers to, after the described control message that terminal sends according to the base station correctly switches to corresponding frequency band, and the result of base station and described terminal interaction business information.
In end side, terminal receives the frequency band switching message that the base station sends in the whole system bandwidth, if receive described switching message, switch to corresponding frequency band, and utilize the frequency band after switching to receive and send business information, if do not receive described switching message, receive and send business information on original frequency band.
Because the control channel of LTE system has taken the whole system bandwidth, therefore no matter the business information of terminal is received and dispatched on which frequency band, and terminal can receive the control information that the base station sends.
In some system, due to the restriction of the conditions such as hardware, require terminal simple as much as possible, thereby in order to simplify the handling process cost saving.For the purpose of simplifying, terminal can only work in one section narrower spectral range, and control information and business information be sending and receiving in this spectral range all, and namely control channel and Traffic Channel only take the partial-band of whole system bandwidth.When the frequency band decline that takies when control channel and the Traffic Channel of terminal is larger, base station side need to send frequency band to terminal and switch message, notification terminal switches to other frequency band transmitting and receiving service information and control information, base station side also can transmitting and receiving service information and control information on these other frequency band, specifically sees also Fig. 2.
Fig. 2 is the changing method flow chart when in prior art, control channel takies the partial-band of whole system bandwidth.
As shown in Figure 2, the method comprises:
Step 201, base station send to terminal the control message that frequency band switches on the current frequency band that takies.
Step 202, the base station sends control information and business information to terminal on the frequency band after switching, the business information of receiving terminal on the frequency band after switching.
In this step, if terminal has correctly received described control message, carry out frequency band and switch, and on the frequency band after switching with the mutual control information in base station.
Yet if terminal could not correctly receive described control message, terminal will be at the sending and receiving of the enterprising industry business of original frequency band information.
As seen, when the control channel of communication system takies the partial-band of whole system bandwidth, if terminal could not correctly receive the frequency band switching controls message that the base station sends first, to cause also can't receiving the frequency band switching controls message that the base station sends again after terminal, thereby it is lower to cause terminal to carry out the reliability that frequency band switches.
And, because terminal can't be carried out the frequency band switching reliably, also will cause terminal transmitting and receiving service information on original frequency band, and the base station sending transmitting and receiving service information on the frequency band after switching, communication system can't normally be carried out communication.
Summary of the invention
In view of this, the invention provides the method for carrying out frequency band switching in a kind of communication system, carry out to improve terminal the reliability that frequency band switches.
Method for carrying out frequency band switching in a kind of communication system, the control channel of this communication system takies the partial-band of whole system bandwidth, current first frequency band that takies of control channel, the method comprises:
The base station transmits control message to terminal on the first frequency band and the second frequency band, until receive the confirmation message of described terminal feedback;
Described control message indicating terminal switches to described the second frequency band with control channel from described the first frequency band; Described acknowledge message indicates this terminal correctly to receive described control message.
As seen from the above technical solution, when the control channel of communication system takies the partial-band of whole system bandwidth, the base station sends to terminal on the current frequency band that takies of control channel and target band and is used for carrying out the control message that frequency band switches, until receive the confirmation message of described terminal feedback.because the base station is not only at the current frequency band that takies or only send described control message to terminal on target band, but all send described control message to terminal on the described current frequency band that takies and described target band, therefore no matter described terminal is at the described current frequency band that takies or works on described target band, can receive described control message, and, if do not receive the confirmation message of terminal feedback after the described control message of base station transmission, the base station can send described control message to described terminal again, until receive the confirmation message of terminal feedback, further improve terminal and carried out the reliability that frequency band switches.
Description of drawings
Fig. 1 is that the LTE system carries out the method flow diagram that frequency band switches.
Fig. 2 is the changing method flow chart when in prior art, control channel takies the partial-band of whole system bandwidth.
Fig. 3 is the detail flowchart of base station side in method for carrying out frequency band switching in communication system provided by the invention.
Fig. 4 is the detail flowchart of end side in method for carrying out frequency band switching in communication system provided by the invention.
Embodiment
Method for carrying out frequency band switching provided by the invention is applied in the communication system of partial-band that control channel takies the whole system bandwidth.Particularly, the frequency band that terminal is carried out taking before frequency band switches is designated as the first frequency band, the frequency band that terminal is carried out taking after frequency band switches is designated as the second frequency band, the base station transmits control message to terminal on described the first frequency band and described the second frequency band, until receive the confirmation message of described terminal feedback, wherein, described control message indicating terminal switches to described the second frequency band with control channel from described the first frequency band, and described acknowledge message indicates this terminal correctly to receive described control message.
In Fig. 3 and flow process shown in Figure 4, the frequency band that terminal is carried out taking before frequency band switches is designated as the first frequency band, and the frequency band that terminal is carried out taking after frequency band switches is designated as the second frequency band.
Fig. 3 is the detail flowchart of base station side in method for carrying out frequency band switching in communication system provided by the invention.
As shown in Figure 3, this flow process comprises:
Wherein, described control message indicating terminal switches to the second frequency band with control channel from described the first frequency band, and this control message further indicating terminal switches to the second frequency band with Traffic Channel from described the first frequency band.
The confirmation message of step 302, base station receiving terminal feedback on described the first frequency band.
Method shown in Figure 3 is that the base station first only issues control message on the first frequency band, after not receiving within a predetermined period of time the confirmation message of terminal feedback, transmit control message on the first frequency band and the second frequency band again, in fact, for the ease of unified flow process, simplify the operation of base station end, the base station can all transmit control message to terminal on the first frequency band and the second frequency band at every turn.
Fig. 4 is the detail flowchart of end side in method for carrying out frequency band switching in communication system provided by the invention.
As shown in Figure 4, this flow process comprises:
Wherein, if terminal does not also switch to described the second frequency band, on described the first frequency band to the described acknowledge message of base station feedback, if terminal has switched to described the second frequency band, on described the second frequency band to the described acknowledge message of base station feedback.
After base station and terminal are all completed the frequency band handover operation, can be on described the second frequency range mutual business information of base station and terminal.Particularly: after the confirmation message of terminal feedback is received in the base station, can be on described the second frequency band send dispatching command to terminal, terminal according to this dispatching command on described the second frequency band with base station interactive service information; Perhaps, terminal is after the described acknowledge message of feedback, if terminal has been received other control information different with last time that the base station sends or has not been received within a predetermined period of time the identical control message of described control message of receiving with the last time, illustrate that the base station received the confirmation message of terminal feedback, and the base station has also switched to described the second frequency range work, thus terminal and described base station can be on described the second frequency band mutual business information; Perhaps, after described acknowledge message is received in the base station, wait for predetermined amount of time to be used for carrying out the time slot of business transmission corresponding with terminal, on described the second frequency band with the terminal interaction business information.
By the present invention, when in the communication system of terminal works in the arrowband, can not increase on the complexity basis of system, guarantee that with less control signal expense terminal carries out the reliability that frequency is switched.
The above is only preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.
Claims (7)
1. the method for carrying out frequency band switching in a communication system, the control channel of this communication system takies the partial-band of whole system bandwidth, and current first frequency band that takies of control channel is characterized in that, and the method comprises:
The base station transmits control message to terminal on the first frequency band and the second frequency band, until receive the confirmation message of described terminal feedback;
Described control message indicating terminal switches to described the second frequency band with control channel from described the first frequency band; Described acknowledge message indicates this terminal correctly to receive described control message;
Wherein, described base station transmits control message to terminal on the first frequency band and the second frequency band and comprises:
The base station sends described control message to terminal on described the first frequency band, receive described acknowledge message at described the first frequency band, if the base station is not received described acknowledge message within a predetermined period of time, the base station sends described control message to terminal on described the first frequency band and described the second frequency band.
2. method according to claim 1, is characterized in that,
The base station receives described acknowledge message on described the first frequency band and described the second frequency band.
3. method according to claim 1, is characterized in that, the method further comprises:
After the described acknowledge message of terminal feedback is received in the base station, switch to described the second frequency band and described terminal and communicate.
4. method according to claim 1, is characterized in that,
After terminal receives described control message, if terminal does not also switch to described the second frequency band, on described the first frequency band to the described acknowledge message of base station feedback, if terminal has switched to described the second frequency band, on described the second frequency band to the described acknowledge message of base station feedback.
5. the described method of arbitrary claim of according to claim 1 to 4, is characterized in that, the further indicating terminal of described control message switches to described the second frequency band with Traffic Channel from described the first frequency band, and the method further comprises:
After the confirmation message of terminal feedback is received in the base station, send dispatching command to terminal on described the second frequency band, terminal according to this dispatching command on described the second frequency band with base station interactive service information.
6. the described method of arbitrary claim of according to claim 1 to 4, is characterized in that, the further indicating terminal of described control message switches to described the second frequency band with Traffic Channel from described the first frequency band, further carries dispatching command in described control message; The method further comprises:
Terminal is after the described acknowledge message of feedback, if terminal received other control information different with last time that the base station sends or do not received within a predetermined period of time the identical control message of described control message of receiving with the last time, terminal and described base station business information alternately on described the second frequency band.
7. method according to claim 6, is characterized in that, the method further comprises:
After described acknowledge message is received in the base station, directly send the control information of other different with last time to terminal on described the second frequency band, perhaps wait for predetermined amount of time, on described the second frequency band with the terminal interaction business information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010252631 CN102378296B (en) | 2010-08-12 | 2010-08-12 | Method for carrying out frequency band switching in communication system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010252631 CN102378296B (en) | 2010-08-12 | 2010-08-12 | Method for carrying out frequency band switching in communication system |
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| CN102378296A CN102378296A (en) | 2012-03-14 |
| CN102378296B true CN102378296B (en) | 2013-06-05 |
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| CN 201010252631 Expired - Fee Related CN102378296B (en) | 2010-08-12 | 2010-08-12 | Method for carrying out frequency band switching in communication system |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2018126453A1 (en) * | 2017-01-06 | 2018-07-12 | 广东欧珀移动通信有限公司 | Handover method, base station, and terminal |
| CN109691200B (en) * | 2017-09-14 | 2020-10-30 | Oppo广东移动通信有限公司 | Method for activating bandwidth part BWP and related product |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1496148A (en) * | 1995-04-19 | 2004-05-12 | ����ɭ�绰�ɷ�����˾ | Multiple super high frequency band radio communication system |
| CN101483917A (en) * | 2008-01-10 | 2009-07-15 | 华为技术有限公司 | Frequency band access switching method, terminal and base station |
| CN101536577A (en) * | 2006-11-08 | 2009-09-16 | 富士通株式会社 | Base station apparatus, user equipment and method used in mobile communication system performing inter-band handover |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2384052A1 (en) * | 2009-01-16 | 2011-11-02 | Sharp Kabushiki Kaisha | Mobile station apparatus, base station apparatus, handoff method, and mobile communication system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1496148A (en) * | 1995-04-19 | 2004-05-12 | ����ɭ�绰�ɷ�����˾ | Multiple super high frequency band radio communication system |
| CN101536577A (en) * | 2006-11-08 | 2009-09-16 | 富士通株式会社 | Base station apparatus, user equipment and method used in mobile communication system performing inter-band handover |
| CN101483917A (en) * | 2008-01-10 | 2009-07-15 | 华为技术有限公司 | Frequency band access switching method, terminal and base station |
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| CN102378296A (en) | 2012-03-14 |
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