CN100433612C - Method for monitoring quality of down wireless link over network - Google Patents
Method for monitoring quality of down wireless link over network Download PDFInfo
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- CN100433612C CN100433612C CNB2005100831275A CN200510083127A CN100433612C CN 100433612 C CN100433612 C CN 100433612C CN B2005100831275 A CNB2005100831275 A CN B2005100831275A CN 200510083127 A CN200510083127 A CN 200510083127A CN 100433612 C CN100433612 C CN 100433612C
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Abstract
The present invention discloses a method for monitoring the quality of down wireless links at the network side. A wireless resource management module at the network side judges the transmission mode of the current down wireless link in an RLC layer, and monitors the BLER of the current down wireless link according to a judgment result. When the transmission mode of the current wireless link in the RLC layer is a confirmation mode, the RLC layer calculates and reports upwards the BLER value of the down wireless link; the BLER value is equal to the ratio that the number of data transmission blocks required to be retransmitted is divided by the total number of data transmission blocks which are sent downwards. The method of the present invention can directly monitor the down wireless link BLER at the network side and realize the purposes of monitoring the quality of the down wireless link in real time and reasonably assigning down the wireless resource. The BLER value obtained by the method of the present invention has high accuracy. Message interaction quantity in the process of reporting upwards is greatly decreased; the network resource and the wireless resource are greatly saved.
Description
Technical field
The present invention relates to the wireless network communication technique field, relate in particular to a kind of method at the network side monitoring quality of down wireless link.
Background technology
Network side in the WCDMA system has a wireless resource management algorithm module, and this module is in charge of the management of the access-in resource of whole wireless access side, comprises a yard resource, power resource, link-quality etc.
Wherein, the communication quality of Radio Link is weighed by BLER (Block Error Rate).In time and accurately monitor BLER and just can take measure targetedly, prevent call drop, improve communication quality, promote user's satisfaction at network side.
For up link, can in time and exactly obtain current BLER value at an easy rate.Because the exterior ring power control module of the submodule of RRM module can be added up BLER, and carry out exterior ring power according to current BLER and control.
Except obtaining the BLER value of up link, the RRM module also wishes accurately and timely to obtain the BLER value of down link.
At present, the RRM module of network side can realize monitoring the BLER of down link by the mode of mobile terminal reporting, and concrete scheme is:
Network side sends to portable terminal by space interface signaling with the BLER desired value of down link, BLER value by the actual down link of the exterior ring power control module control of portable terminal, and by sending out measurement control order to portable terminal, measure the BLER value of current reality by portable terminal, report the RRM module of network side.
But there is following shortcoming in technique scheme:
One, because the BLER value of some mobile terminal reporting is until the BLER value till reporting constantly according to inserting the beginning back certainly, can not reflect current BLER value in real time, therefore, the Radio Resource module of network side can't be known the actual BLER value of current down wireless link in fact at all, can't accurately judge current downlink quality, can not be at network side allocation of downlink Radio Resource reasonably;
Two, because portable terminal is according to the indication of the CRC (cyclic redundancy check (CRC) code) in the packet of receiving altogether, miss the judgement and the statistical report BLER value of piece, therefore, it is can receive packet that portable terminal correctly reports the prerequisite of BLER.If the current wireless environment is poor, cause down wireless link can't receive packet at all, that is to say that the basic demodulation of portable terminal does not go out any packet information, portable terminal just can't carry out the statistics of BLER actual value under this situation, causes the BLER value inaccurate;
Three, because portable terminal adopts the mode that periodically reports, making has a large amount of interacting messages between portable terminal and network side, so all cause very big waste for mobile resources, Internet resources, Radio Resource.
Summary of the invention
In view of above-mentioned existing in prior technology problem, the purpose of this invention is to provide a kind of method at the network side monitoring quality of down wireless link, can directly carry out the monitoring of down wireless link BLER at network side, realize monitoring quality of down wireless link in real time, in the purpose of network side reasonable distribution downlink radio resource.
The objective of the invention is to be achieved through the following technical solutions:
The invention provides a kind of method at the network side monitoring quality of down wireless link, judge the transmission mode of current down wireless link by the RRM module at Radio Link control rlc layer, when the current wireless link when the transmission mode of rlc layer is affirmation mode, then by the rlc layer of network side statistics and report the BLER value of down wireless link.
When the current wireless link when the transmission mode of rlc layer is transparent transmission or Unacknowledged Mode, then by portable terminal statistics and report the BLER value of down wireless link.
Described rlc layer statistics also reports the process of the BLER value of down wireless link to comprise:
The order that A, RRM module are given rlc layer transmitting supervisory down wireless link BLER;
B, rlc layer are determined the statistical of BLER;
C, rlc layer calculate the BLER value of current down wireless link according to the statistical of determining;
The BLER value of the current down wireless link that D, rlc layer will calculate reports the RRM module.
The statistical of described down wireless link BLER comprises:
With the data transmission period is cycle statistics BLER; Be cycle statistics BLER perhaps with transfer of data quantity.
Described step B specifically comprises:
Rlc layer is determined the statistical of BLER according to described order.
When rlc layer adopted data transmission period to be cycle statistics BLER, described step C specifically comprised:
C1, rlc layer setting data transmission time periods;
C2, rlc layer in the cycle, are added up current data transmission block sum that has issued and the data transmission block number that needs to retransmit at the data transmission period of setting;
The data transmission block number that C3, rlc layer will need to retransmit calculates the BLER value of current wireless down link divided by the data transmission block sum that has issued.
When rlc layer adopted transfer of data quantity to be cycle statistics BLER, described step C specifically comprised:
C4, rlc layer setting data transmission quantity cycle;
C5, when the data transmission block that issues when rlc layer reaches the transfer of data quantity of setting, statistics wherein needs the data transmission block number that retransmits;
C6, rlc layer will need the data transmission block number that the retransmits transfer of data quantity divided by described setting, calculate the BLER value of current wireless down link.
As seen from the above technical solution provided by the invention, adopt method of the present invention, can directly carry out the monitoring of down wireless link BLER at network side, realize monitoring quality of down wireless link in real time, in the purpose of network side reasonable distribution downlink radio resource; And the BLER value accuracy height that adopts the method for the invention to obtain; The interacting message amount significantly reduces in reporting process, greatly conserve network resources and Radio Resource.
Description of drawings
Fig. 1 is the workflow diagram of the method for the invention.
Embodiment
Core concept of the present invention is: WCDMA grid side, the number transmission all can be passed through RLC (Radio Link Control, Radio Link control) layer carries out, transfer of data characteristics in conjunction with rlc layer, the RRM module can be sent out control messages to rlc layer, requires rlc layer to finish the statistics of down link BLER value and report.So just can add up down link BLER value at network side, the quality of real time monitoring down wireless link, thus the reasonable distribution downlink radio resource has solved the problems of the prior art.
We know, the rlc layer agreement in the WCDMA system, and for transfer of data provides three kinds of pattern: TM (Transparent Mode, transparent transmission mode), UM (Unacknowledged Mode, Unacknowledged Mode) and AM (Acknowledged Mode, affirmation mode).
Wherein, when the TM pattern was packet process rlc layer, adopting directly, transmission was the mode of transparent transmission;
When the UM pattern is a packet through rlc layer, can buffer memory, and transmit through after the segmentation;
When the AM pattern is packet process rlc layer, not only wants buffer memory and segmentation, and after must obtaining the opposite end affirmation, just calculate end of transmission.Its essential idea is after transmitting terminal issues a packet, not abandon this packet at once, but data elder generation buffer memory is got up; Receiving terminal in the state information bag, tells whether transmitting terminal has correctly received this packet to transmitting terminal send state information bag then, if received, transmitting terminal then abandons this packet, if do not receive, then transmitting terminal is retransmitted this packet to receiving terminal.
For the business of non real-time good service, the error rate of its Qos (service quality) attribute specification SDU (Service Data Unit) is 10
-4～10
-5Magnitude, therefore when the network side rlc layer transmits, use all be RLC AM pattern.When using the AM mode transfer, rlc layer can count exactly and send how many packets, wherein has how much to belong to the packet that the opposite end does not correctly receive the needs re-transmission.
On dedicated channel, during the downward transmits data packets of rlc layer, the directly corresponding TB (data transmission block) of a RLC PDU (protocol Data Unit), so the BLER value of down wireless link is equivalent to packet (TB piece) number of needs re-transmission divided by the packet that has issued (TB piece) number.Therefore, as long as increase statistical function, just can obtain the actual BLER value of down wireless link very easily at rlc layer.
By analysis, as can be seen, when rlc layer adopts the AM pattern, can add up the BLER value by rlc layer to transfer of data RLC pattern; And if rlc layer is when adopting TM or UM pattern, then the mode that can only use prior art to provide promptly requires also periodic report of portable terminal statistics BLER value.
The BLER of rlc layer statistics down wireless link can be cycle statistics BLER according to data transmission period, is cycle statistics BLER according to transfer of data quantity perhaps.
For the present invention there being further understanding, method of the present invention is described in detail below in conjunction with accompanying drawing.
The specific implementation of the method for the invention may further comprise the steps as shown in Figure 1:
Step 11: whether the rlc layer of judging down wireless link adopts the AM pattern.
The RRM module of network side is at first judged the transmission mode that current down wireless link uses at rlc layer;
If current down wireless link is TM or UM transmission mode the rlc layer use, then execution in step 12, according to prior art scheme statistics BLER;
If current down wireless link is the AM transmission mode the rlc layer use, then execution in step 13.
Step 12: portable terminal is responsible for adding up current BLER value and is periodically reported.
If current down wireless link is TM or UM transmission mode the rlc layer use, the scheme that provides according to prior art then, network side sends the control command of measuring the BLER value to portable terminal, is responsible for adding up the BLER value of current down wireless link and is periodically reported network side by portable terminal.
Step 13: RRM module command rlc layer statistics BLER also reports.
If current down wireless link uses the AM mode transfer at rlc layer, then the RRM module of network side is given the order of rlc layer transmitting supervisory down link BLER;
This order also comprises the BLER statistical that rlc layer should specifically adopt, and statistical comprises two kinds:
With the data transmission period is cycle statistics BLER, is cycle statistics BLER with transfer of data quantity perhaps.
Step 14:RLC layer is determined the statistical of BLER.
Rlc layer is determined the concrete statistical of BLER according to the order that the RRM module issues;
If it is the statistical in cycle that this order request rlc layer adopts data transmission period, then execution in step 15;
If it is the statistical report mode in cycle that this order request rlc layer adopts transfer of data quantity, then execution in step 16.
Step 15:RLC layer employing data transmission period is that the mode in cycle is added up BLER, and reports.
It is that the mode in cycle is added up and reported the process of BLER specifically to comprise the steps: that rlc layer adopts data transmission period
The first, rlc layer setting data transmission time periods;
The second, rlc layer is added up current TB data block total number that has issued and the TB piece number that needs to retransmit in the time cycle of setting;
The 3rd, rlc layer calculates the BLER value of current wireless down link, and the TB piece number that just will need to retransmit is divided by the TB piece sum that has issued;
The 4th, RLC in time reports the RRM module with the BLER value of the current wireless down link that calculates.
Wherein, RLC is the setting data transmission time periods according to actual needs, and the time cycle of setting should be reasonable, illustrates below:
If the size of a RLC PDU is 336bit, then:
For transmission rate is the bandwidth of 384kbps, and 100ms just can send 120 bags, promptly issues 120 TB pieces;
For transmission rate is the bandwidth of 64kbps, and 100ms sends 20 bags, promptly issues 20 TB pieces;
For transmission rate is the bandwidth of 8kpbs, and 100ms can send 2.5 bags, promptly issues 2.5 TB pieces.
By above-mentioned data as can be seen, the number of data packets difference that different bandwidth sent in the identical time is very big, thereby causes the difference of accuracy of corresponding BLER value also very big.
If look after little bandwidth, the time of this measurement period just can not be too short; If but measuring period is long, the time delay that the BLER value reports is just big, and fall behind the opportunity that can cause adjusting BLER, thereby influence linkage communication quality.
Therefore, rlc layer should rationally the setting-up time cycle, be generally 20 milliseconds to 3 seconds according to actual conditions.
Step 16:RLC employing transfer of data quantity is that the mode in cycle is added up BLER, and reports.
It is that the mode in cycle is added up and reported the process of BLER specifically to comprise the steps: that rlc layer adopts transfer of data quantity
The first, the rlc layer setting data transmission quantity cycle;
The second, when the TB piece number that issues when rlc layer reaches the transfer of data quantity of setting, the TB piece number that statistics wherein retransmits;
The 3rd, rlc layer calculates the BLER value of current wireless down link, and the TB piece number that just will need to retransmit is divided by the transfer of data quantity of setting;
The 4th, rlc layer in time reports the RRM module with the BLER value of the current wireless down link that calculates.
Rlc layer should rationally the setting data transmission quantity cycle, when the TB piece number that issues when rlc layer reaches 50～1000 usually, calculate the BLER value according to actual conditions.
Adopt this statistical can control the statistical accuracy of BLER value.
In sum, when if current down wireless link uses the AM mode transfer at rlc layer, adopt method of the present invention, can directly carry out the monitoring of the BLER value of down wireless link at network side, realize monitoring quality of down wireless link in real time, in the purpose of network side reasonable distribution downlink radio resource; And the BLER value accuracy height that adopts the method for the invention to obtain, especially adopting transfer of data quantity is that the precision of the mode in the cycle BLER value of adding up is higher; And the interacting message amount significantly reduces in reporting the BLER process, greatly conserve network resources and Radio Resource.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (7)
1, a kind of method at the network side monitoring quality of down wireless link, it is characterized in that: the RRM module is judged the transmission mode of current down wireless link at Radio Link control rlc layer, when the current wireless link when the transmission mode of rlc layer is affirmation mode, then by the rlc layer of network side statistics and report the BLER value of down wireless link.
2, method according to claim 1 is characterized in that: when the current wireless link when the transmission mode of rlc layer is transparent transmission or Unacknowledged Mode, then by portable terminal statistics and report the BLER value of down wireless link.
3, method according to claim 1 is characterized in that, described rlc layer statistics also reports the process of the BLER value of down wireless link to comprise:
The order that A, RRM module are given rlc layer transmitting supervisory down wireless link BLER;
B, rlc layer are determined the statistical of BLER;
C, rlc layer calculate the BLER value of current down wireless link according to the statistical of determining;
The BLER value of the current down wireless link that D, rlc layer will calculate reports the RRM module.
4, method according to claim 3 is characterized in that, the statistical of described down wireless link BLER comprises:
With the data transmission period is cycle statistics BLER; Be cycle statistics BLER perhaps with transfer of data quantity.
5, method according to claim 4 is characterized in that, described step B specifically comprises:
Rlc layer is determined the statistical of BLER according to described order.
6, method according to claim 5 is characterized in that, when rlc layer adopted data transmission period to be cycle statistics BLER, described step C specifically comprised:
C1, rlc layer setting data transmission time periods;
C2, rlc layer in the cycle, are added up current data transmission block sum that has issued and the data transmission block number that needs to retransmit at the data transmission period of setting;
The data transmission block number that C3, rlc layer will need to retransmit calculates the BLER value of current wireless down link divided by the data transmission block sum that has issued.
7, method according to claim 5 is characterized in that, when rlc layer adopted transfer of data quantity to be cycle statistics BLER, described step C specifically comprised:
C4, rlc layer setting data transmission quantity cycle;
C5, when the data transmission block that issues when rlc layer reaches the transfer of data quantity of setting, statistics wherein needs the data transmission block number that retransmits;
C6, rlc layer will need the data transmission block number that the retransmits transfer of data quantity divided by described setting, calculate the BLER value of current wireless down link.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100831275A CN100433612C (en) | 2005-07-13 | 2005-07-13 | Method for monitoring quality of down wireless link over network |
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| CNB2005100831275A CN100433612C (en) | 2005-07-13 | 2005-07-13 | Method for monitoring quality of down wireless link over network |
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| CN1863036A CN1863036A (en) | 2006-11-15 |
| CN100433612C true CN100433612C (en) | 2008-11-12 |
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| CN110234124B (en) * | 2019-04-19 | 2022-04-01 | 维沃移动通信（深圳）有限公司 | Information transmission method and terminal equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1203009A (en) * | 1995-10-02 | 1998-12-23 | 艾利森电话股份有限公司 | System and method for flexible coding modulation, and time slot allocation in a radio telecommunications network |
| US20020094810A1 (en) * | 2001-01-17 | 2002-07-18 | Hassan Hassan I. | Uplink transmission with selective ARQ based on signal quality |
| CN1411221A (en) * | 2001-10-09 | 2003-04-16 | 华为技术有限公司 | Descending grouped data transmission method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1203009A (en) * | 1995-10-02 | 1998-12-23 | 艾利森电话股份有限公司 | System and method for flexible coding modulation, and time slot allocation in a radio telecommunications network |
| US20020094810A1 (en) * | 2001-01-17 | 2002-07-18 | Hassan Hassan I. | Uplink transmission with selective ARQ based on signal quality |
| CN1411221A (en) * | 2001-10-09 | 2003-04-16 | 华为技术有限公司 | Descending grouped data transmission method |
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