CN100391277C - Monitoring method for notifying channel load - Google Patents
Monitoring method for notifying channel load Download PDFInfo
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- CN100391277C CN100391277C CNB2006100660774A CN200610066077A CN100391277C CN 100391277 C CN100391277 C CN 100391277C CN B2006100660774 A CNB2006100660774 A CN B2006100660774A CN 200610066077 A CN200610066077 A CN 200610066077A CN 100391277 C CN100391277 C CN 100391277C
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Abstract
The present invention provides a method for monitoring the load of a notification channel (NCH), which is used for the group call service of a GSM network. The method comprises the steps as follows: a base transmission station (BTS) detects the load condition of the NCH; when the BTS detects that the load of the NCH exceeds a set threshold, an NCH overload message is reported to a base station controller (BSC). The present invention is used for realizing the monitoring of the load of the NCH in the group call service of the GSM network.
Description
Technical field
The present invention relates to the trunked call wireless communication technology field, be meant the method for supervising of a kind of notification channel (NCH) load especially.
Background technology
In the GSM network, the Common Control Channel of each sub-district (CCCH) is made up of access grant channel (AGCH), paging channel (PCH), is respectively applied for to send immediate assignment message, beep-page message.Virtual network operator can be in conjunction with the cell telephone traffic model, Common Control Channel configuration (CCCH CONF) by allocating cell, the message blocks number that is used to send access grant message, beep-page message in each Broadcast Control Channel (BCCH) multi-frame is set, the bearing capacity of balance AGCH channel and PCH channel is optimized network quality.
In the GSM network system running, BTS detects the load condition of AGCH channel, PCH channel in real time, when overload appears in above-mentioned channel, BTS periodically reports Common Control Channel overload message (CCCH LOAD INDICATION) to BSC, the BSC that receives message reports mobile switching centre (MSC) unusually with this, is handled by the Flow Control that MSC is correlated with to the GSM network system.Virtual network operator also can be according to this abnormal case, and the CCCH channel configuration of time update sub-district improves network quality.
In the GSM network of supporting VGCS/VBS (speech group-calling service/Voice Broadcast Service) trunked call, the CCCH channel of each sub-district is made up of AGCH channel, PCH channel, notification channel (NCH), is respectively applied for to send immediate assignment message, beep-page message, notification message.At present, support the monitoring mechanism of the GSM network shortage of VGCS/VBS trunked call at NCH channel load situation, Virtual network operator can't be recognized the load condition of NCH channel, influences the optimization and the adjustment of CCCH channel parameter, is unfavorable for promoting network quality.
Summary of the invention
In view of this, main purpose of the present invention has been to provide a kind of method for supervising of NCH channel, so that in the trunked call service of GSM network, realize the monitoring to the NCH channel load.
The method for supervising of notification channel NCH provided by the invention load is used for the trunked call service of GSM network, comprising:
Base station BTS detects the load condition of NCH channel;
When detecting the NCH channel load, BTS exceeds when setting thresholding, increase the NCHLoad cell in the Common Control Channel overload message CCCH LOAD INDICATION message that reports to base station controller BSC, described NCH Load cell is used to transmit NCH channel load situation.
Wherein, described trunked call service is speech group-calling service VGCS or Voice Broadcast Service VBS.
Wherein, the described NCH of detecting channel load exceeds the condition of setting thresholding and comprises: BTS detects the new notification message that receives and waits for whether the duration of scheduling transmission first surpasses the thresholding of setting, if expression NCH channel load exceeds the setting thresholding.
Wherein, the described NCH of detecting channel load exceeds the condition of setting thresholding and comprises: whether the time interval that BTS detects the double scheduling transmission of same the notification message that receives surpasses the setting thresholding, if expression NCH channel load exceeds the setting thresholding.
Wherein, the described Common Control Channel overload message CCCHLOAD INDICATION message that reports to base station controller BSC is for periodically reporting.
Wherein, NCH Load cell comprises:
Component identification Element Identifier is used to identify NCH Load cell;
Notice buffering area Notification Buffer Space is used for identifying the quantity that can also hold notification message in the Common Control Channel CCCH buffering area of this sub-district.
Wherein, this method further comprises: BSC transmits the overload message OVERLOAD that indication NCH channel transships to moving exchanging center MSC after receiving the Common Control Channel overload message of carrying NCH channel load situation, is handled by MSC.
Wherein, this method further comprises: after BSC receives the Common Control Channel overload message of carrying NCH channel load situation, to the O﹠amp of operation maintenance center; M transmits the message of indication NCH channel overload, by O﹠amp; M handles.
As seen from the above, the present invention is in the trunked call service of GSM network, in the VGCS/VBS trunked call service, BTS can detect in real time to the NCH channel load, and when detecting the NCH channel load, in time report BSC, and report MSC or O﹠amp by BSC above certain thresholding; M to do corresponding processing, reduces traffic carrying capacity as control and reduces the NCH channel load, perhaps carries out reasonable configuration Common Control Channel parameter by operator, thereby reaches the purpose that promotes network quality.
Description of drawings
Fig. 1 is a NCH channel monitoring flow chart of the present invention.
Embodiment
The present invention can in time offer BSC by BTS in order to make NCH channel overload situations, at first, the CCCH LOAD INDICATION message that BTS is sent to BSC is changed, shown in the italics in the following table 1, in this message, increase NCH channel overload (NCH Load) cell newly, be used to transmit the load condition of NCH channel.Following table 1 is the specific descriptions of CCCH LOADINDICATION message provided by the invention:
| INFORMATION ELEMENT (cell) | The REFERENCE reference | The PRESENCE existing way | The FORMAT coded format | LENGTH length |
| Message discriminator (message semantic definition) | ?9.1 | M is necessary | The V value | ?1 |
| Message type (type of message) | ?9.2 | ?M | ?V | ?1 |
| Channel number (note) (channel quantity) | ?9.3.1 | ?M | TV type-value | ?2 |
| RACH Load (RACH overload) | ?9.3.18 | C is optional | The TLV type-length-value | ?＞＝8 |
| Paging?Load | ?9.3.15 | ?C | ?TV | ?3 |
| (paging overload) | ||||
| NCH Load (NCH channel overload) | C | TV type-value | 3 |
Table 1
Wherein, the NCH Load cell shown in the table 1 is optional cell, is only judging under the NCH channel load overload situations, when BTS sends CCCH LOAD INDICATION message to BSC, just need carry this cell in CCCH LOAD INDICATION message.Shown in this NCH Load cell structure table 2 specific as follows:
Table 2
Wherein, it is NCH Load cell that the Element Identifier in the table 2 is used to identify this message,
Value is 0x3F among the present invention, sign NCH Load cell.
Notification Buffer Space is used for identifying the quantity that can also hold notification message in the CCCH buffering area of this sub-district, is a value of encoding in the binary numeral mode.After encoding in the binary numeral mode, the quantity of the notification message that BTS can also hold this sub-district CCCH buffering area inserts this position.
Below, referring to the flow chart shown in Fig. 1, NCH channel load provided by the invention is detected and the method that reports is elaborated, may further comprise the steps:
Step 101:BTS detects the load condition of NCH channel in real time.Wherein, NCH channel load thresholding, the sense cycle parameter can be by (the O﹠amp of operation maintenance center; M) carry out concrete configuration, detection algorithm need be determined in conjunction with the specific implementation of BTS.
For example, the example that the NCH channel load is detected: BTS newly receives a notification message from BSC, and this notification message is waited for scheduling, so that send eating dishes without rice or wine, when waiting for that scheduling time surpasses the setting thresholding, expression NCH channel overload causes in time sending this notification message.
Again for an example that the NCH channel load is detected:, function such as enter to support to lag because in the lifetime that VGCS/VBS calls out, its notification message is periodically to send.Therefore BTS can detect the time interval of the double scheduling transmission of paid-in same notification message, if surpass when setting thresholding, explanation is because NCH channel overload causes and can't in time send a notification message.
After step 102:BTS detects the threshold value that the NCH channel load exceeds setting, report CCCH LOAD INDICATION message to BSC, wherein, carry the NCHLoad cell shown in the table 2 in this message, with notice NCH channel overload situations, comprise the quantity that to hold notification message in the CCCH buffering area of this sub-district in this overload situations.Wherein, CCCH LOAD INDICATION message can periodically report.
Step 103: after BSC receives the NCH channel overload indication that BTS reports, report overload Indication message (OVERLOAD) to MSC, wherein carry former because " NCH channel overload ", this cause value is defined as 0x2A among the present invention.
Step 104: after MSC received described message, judging was after the NCH channel transships, and the Flow Control that the GSM network system is correlated with is handled.For example, can in some cycles, reduce service load quantity, so that traffic load reduces, if still the NCH channel transships, further in another fixed cycle, reduce service load quantity, then so that traffic load further reduces, the rest may be inferred, normal up to the NCH channel load.Handle about Flow Control, non-the present invention pays close attention to content, repeats no more.
Certainly, BSC also can give O﹠amp with NCH channel overload information reporting; M, prompting administrative staff handle, and rationally adjusts the CCCH configuration of sub-district, promotes NCH channel bearing ability, promotes network quality.
By said method as seen, adopt the present invention to monitor NCH channel load situation in real time, when the NCH channel transships, can notify MSC as early as possible or/and O﹠amp; M so that NCH channel overload situations is handled, as carries out Flow Control etc., to reduce traffic load, avoids causing that because of NCH channel overload the user that the message of can not normally issuing a notice causes can't insert trunked call service.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. the method for supervising of notification channel NCH load is used for the trunked call service of GSM network, it is characterized in that, comprising:
Base station BTS detects the load condition of NCH channel;
When detecting the NCH channel load, BTS exceeds when setting thresholding, increase the NCHLoad cell in the Common Control Channel overload message CCCH LOAD INDICATION message that reports to base station controller BSC, described NCH Load cell is used to transmit NCH channel load situation.
2. method according to claim 1 is characterized in that, described trunked call service is speech group-calling service VGCS or Voice Broadcast Service VBS.
3. method according to claim 1 is characterized in that, the described NCH of detecting channel load exceeds the condition of setting thresholding and comprises:
BTS detects the new notification message that receives and waits for whether the duration of scheduling transmission first surpasses the thresholding of setting, if expression NCH channel load exceeds the setting thresholding.
4. method according to claim 1 is characterized in that, the described NCH of detecting channel load exceeds the condition of setting thresholding and comprises:
Whether the time interval that BTS detects the double scheduling transmission of same the notification message that receives surpasses the setting thresholding, if expression NCH channel load exceeds the setting thresholding.
5. method according to claim 1 is characterized in that, the described Common Control Channel overload message CCCH LOAD INDICATION message that reports to base station controller BSC is for periodically reporting.
6. method according to claim 1 is characterized in that, described NCH Load cell comprises:
Component identification Element Identifier is used to identify NCH Load cell;
Notice buffering area Notification Buffer Space is used for identifying the quantity that can also hold notification message in the Common Control Channel CCCH buffering area of this sub-district.
7. method according to claim 1 is characterized in that, this method further comprises:
BSC transmits the overload message OVERLOAD that indication NCH channel transships to moving exchanging center MSC after receiving the Common Control Channel overload message of carrying NCH channel load situation, is handled by MSC.
8. method according to claim 1 is characterized in that, this method further comprises:
After BSC receives the Common Control Channel overload message of carrying NCH channel load situation, to the O﹠amp of operation maintenance center; M transmits the message of indication NCH channel overload, by O﹠amp; M handles.
9. according to claim 7 or 8 described methods, it is characterized in that described processing comprises:
In some cycles, reduce the trunked call service load of current area, normal up to the NCH channel load.
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| CNB2006100660774A CN100391277C (en) | 2006-03-29 | 2006-03-29 | Monitoring method for notifying channel load |
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| CNB2006100660774A CN100391277C (en) | 2006-03-29 | 2006-03-29 | Monitoring method for notifying channel load |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101014173B (en) * | 2006-12-31 | 2012-07-18 | 姜宏伟 | Method and system for transmitting monitoring data of communication base station |
| CN101959235B (en) * | 2009-07-17 | 2013-01-16 | 中兴通讯股份有限公司 | Channel request control method and base station |
| CN102802159B (en) * | 2011-05-25 | 2015-09-16 | 中兴通讯股份有限公司 | The method of adjustment that a kind of Common Control Channel configures, system and base station controller |
| CN102231897B (en) * | 2011-06-24 | 2017-10-03 | 中兴通讯股份有限公司 | The method and device that paging flow is controlled in a kind of cdma system |
| CN102438208B (en) * | 2011-10-20 | 2016-06-22 | 中兴通讯股份有限公司 | The control method of a kind of common channel of trunking communication system and system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1235495A (en) * | 1998-03-25 | 1999-11-17 | Lg情报通信株式会社 | Broadcast message transmitting and receiving method in mobile communication system |
| CN1701536A (en) * | 2003-09-04 | 2005-11-23 | 三星电子株式会社 | Apparatus and method for reducing paging channel loading for broadcast multicast services in a wireless network |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1235495A (en) * | 1998-03-25 | 1999-11-17 | Lg情报通信株式会社 | Broadcast message transmitting and receiving method in mobile communication system |
| CN1701536A (en) * | 2003-09-04 | 2005-11-23 | 三星电子株式会社 | Apparatus and method for reducing paging channel loading for broadcast multicast services in a wireless network |
Non-Patent Citations (2)
| Title |
|---|
| GSM Digital cellular telecommunication system BSC -BTSinterface Layer 3 specification. ETSI.GSM 08.58 version 5.10.0 Release 1996. 1999 |
| GSM Digital cellular telecommunication system BSC -BTSinterface Layer 3 specification. ETSI.GSM 08.58 version 5.10.0 Release 1996. 1999 * |
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