CN1909708A - Detecting device, system and method for wireless transmission error - Google Patents
Detecting device, system and method for wireless transmission error Download PDFInfo
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Abstract
The invention relates to a device of checking wireless transmission mistake, which comprises a multi-carrier-frequency receiving sending unit and an error block checking unit, wherein it can check the data that sent and received at each carrier frequency, and sum the number of error data block; when the stat value is over one preset threshold value, executing some treatment. The invention also provides a relative checking system and checking method. The invention can easily find the error on one carrier frequency to avoid wasting resource.
Description
Technical Field
The present invention relates to the General Packet Radio Service (GPRS) field, and in particular, to a device, a system, and a method for detecting a Radio transmission error in a multi-load system.
Background
The General Packet Radio Service (GPRS) standard provides a compatible standard for cellular mobile telecommunications systems. The GPRS standard ensures that a Mobile Station (MS) operating in the GPRS system can obtain communication services when operating in a system manufactured according to the standard.
Fig. 1 is a block diagram of a GPRS communication system of the prior art. The communication system includes a plurality of Base Transceiver Stations (BTSs) 108, each connected to a Base Station Controller (BSC) 110, the BSC110 further connected to a Packet Control Unit (PCU) 112. The BSC110 and the BTS108 form a Base Station Subsystem (BSS), and in other examples, the PCU112 may be disposed in the BSC110 of the BSS. The PCU112 is connected to a Serving GPRS Support Node (SGSN) 114 via a Gb interface. And the SGSN114 is connected to a Gateway GPRS Support Node (GGSN) 116 via a GPRS backbone network (not shown). The BTS, BSC, PCU, SGSN and GGSN form the basic network structure of GPRS. Of course, it also further includes a mobile station MS102 residing in a cell covered by the BTS108 and served by the BTS 108. And MS102 and BTS108 communicate data to each other over air interface 104.
When MS102 needs to communicate data with external network 118, the data may be conveyed to MS102 via GGSN116, SGSN114, PCU112, BSC110, and BTS 108. Data is typically included in data packets (i.e., data blocks) formatted in accordance with the Internet Protocol (IP) standard. When PCU112 receives data destined for MS102, PCU112 stores the received data in a buffer within the PCU associated with MS102 and BTS108, or discards the data. PCU112 then conveys the data to MS102 by retrieving the stored data blocks from the buffer and conveying the data blocks to MS102 via BSC110 and BTS108, or requests SGSN114 to retransmit the data blocks discarded by the PCU.
In the existing GPRS system, a radio link control layer (i.e., RLC functional layer) is defined in order to implement error detection and retransmission of radio transmission. The functional layer has a peer-to-peer entity Radio Link Control layer/Medium Access Control layer (RLC/MAC) in both BSS and MS, and is used to manage scheduling of Radio resources and to be responsible for transmitting and receiving data blocks. The basic principle of the work is as follows:
a sending end (BSS or MS) codes a number for a data block to be sent and sends the data block on a wireless carrier;
the receiving end (MS or BSS) receives the data block from the transmitting end from the wireless carrier and marks the number of the received data block; the received data block numbers are not necessarily consecutive due to radio bearer instability;
a receiving end (MS or BSS) sends a response message to a sending end regularly, wherein the response message can be Packet Downlink Ack/Nack, EGPRS Packet Downlink Ack/Nack, Packet uplink Ack/Nack and the like, and the response message carries a receiving state bitmap and can indicate the number of a data block which is received correctly or not received correctly in a certain range;
the transmitting end (BSS or MS) retransmits the data blocks that the receiving end did not correctly receive until the receiving end correctly receives, according to the content indicated in the reply message from the receiving end.
In this way, it is ensured by the RLC/MAC layer that all data is correctly transmitted over the radio bearer.
In the existing GPRS system, an MS can only transmit data on one carrier frequency, and the operating bandwidth is 200KHz, which limits the data transmission rate, for example, under the current EGPRS system, the theoretical maximum rate of 8 slots is 473.6 kbps. With the development of data services, the existing rate cannot meet the requirements of users. In view of the above, some communication equipment manufacturers have proposed a method using downlink dual-carrier (or multi-carrier) transmission. As the name implies, downlink dual-carrier (or multi-carrier) transmission breaks through the bandwidth limitation that GSM systems continue to have, and one MS can simultaneously perform downlink reception on more than one carrier frequency. The operating bandwidth becomes 200 x N KHz (N is the carrier frequency number) and the corresponding data transmission rate is also increased in proportion to the carrier frequency number. Still taking the EGPRS (enhanced GPRS) system as an example, the theoretical maximum rate for allocating 8 timeslots on one carrier frequency is 473.6kbps, and if the MS can simultaneously receive on 2 carrier frequencies, the rate can approach 1M, and the rate requirement of the 3G system can be achieved.
The downlink double-load (or multi-load) transmission technology is introduced, the life cycle of the GSM system is greatly prolonged, and the transmission rate can be greatly improved only by simply upgrading the existing system. Not only saves the investment of operators on equipment, but also can meet the development of new services, and has wide development prospect.
However, this method still has disadvantages, and after introducing the downlink dual-carrier (or multi-carrier) transmission technology, the original single radio bearer (only one carrier frequency for transmission) is changed into two (or more), and the RLC/MAC layer cannot detect on which carrier frequency a certain data block is transmitted; for example, when one of the carrier frequencies has a transmission error while the other (or other) carrier frequency(s) is/are transmitting normally, the error detection mechanism based on the RLC layer cannot detect such an error; a waste of radio resources may result.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a device, a system and a method for detecting wireless transmission errors. The problem of transmission error of a certain carrier frequency can be detected when multi-carrier frequency transmission is carried out.
The technical scheme adopted by the invention is that a wireless transmission error detection device is provided, which comprises a multi-carrier frequency receiving and transmitting unit, an error block counting subunit, a threshold value comparison subunit and a comparison result processing subunit, wherein:
the multi-carrier frequency transceiver unit comprises at least two carrier frequency transceiver units, and each carrier frequency transceiver unit is used for transceiving data on one carrier frequency;
the error block counting subunit is used for detecting the data blocks received and transmitted by each carrier frequency receiving and transmitting unit and respectively counting the number of the error data blocks received by each carrier frequency receiving and transmitting unit;
the threshold value comparing subunit is used for comparing the number of the error data blocks received by a certain frequency transceiving unit counted by the error block counting subunit with a preset threshold value and transmitting a comparison result to the comparison result processing subunit;
the comparison result processing subunit is configured to perform corresponding processing when the comparison result received by the comparison result processing subunit from the threshold comparison subunit indicates that a certain number of error data blocks has exceeded a predetermined threshold.
Preferably, the erroneous block counting subunit includes at least two counters, and each counter corresponds to one carrier frequency transceiver unit and is configured to count the erroneous data blocks received by the carrier frequency transceiver unit.
Preferably, the corresponding processing performed by the comparison result processing subunit specifically includes: and informing the comparison result to opposite terminal equipment through a multi-carrier frequency transceiving unit.
Preferably, the device for detecting wireless transmission errors is arranged in a mobile station or a base station subsystem.
Correspondingly, the invention also provides a method for detecting the wireless transmission error, which comprises the following steps:
(a) the multi-carrier frequency receiving and transmitting unit transmits data blocks on at least two carrier frequencies, wherein each carrier frequency corresponds to a carrier frequency receiving and transmitting unit;
(b) the error block counting subunit detects the data blocks transmitted on each carrier frequency and respectively counts the number of the error data blocks transmitted by each carrier frequency;
(c) the threshold comparison subunit compares the number of each statistical error data block with a preset threshold and transmits the comparison result to the comparison result processing subunit;
(d) and the comparison result processing subunit performs corresponding processing when the received comparison result is that the counted number of the error data blocks exceeds the preset threshold value.
Preferably, the step (b) is specifically: the error block counting subunit detects the data blocks transmitted on each carrier frequency, and counts the number of the error data blocks transmitted on each carrier frequency by using a counter respectively.
Preferably, the processing of the comparison result in the step (d) by the comparison result processing subunit specifically includes: and informing the comparison result to opposite terminal equipment through a multi-carrier frequency transceiving unit.
Preferably, in the step (d), after the comparison result processing subunit performs the corresponding processing, the counter exceeding the predetermined threshold is set to zero.
Preferably, further comprising: and after each data transmission is finished, setting the values of all counters in the error block counting subunit to be zero.
Correspondingly, the invention also provides a system for detecting the wireless transmission error, which comprises a base station subsystem and a mobile station which communicates with the base station subsystem through a wireless network, wherein the base station subsystem at least comprises a multi-carrier-frequency receiving and transmitting unit and at least two carrier-frequency receiving and transmitting units, and each carrier-frequency receiving and transmitting unit carries out data transmission with the mobile station on a carrier frequency;
the mobile station at least comprises a multi-carrier frequency receiving and transmitting unit and an error block detection processing unit, wherein,
the multi-carrier frequency transceiver unit comprises at least two carrier frequency transceiver units, and each carrier frequency transceiver unit performs data transmission with the base station subsystem on a carrier frequency;
the error block detection processing unit is used for detecting and counting the number of error data blocks received by each carrier frequency transceiver unit, and performing corresponding processing when a certain number of error data blocks appear on a certain carrier frequency transceiver unit.
Preferably, the erroneous block detection processing unit further includes an erroneous block counting subunit, a threshold value comparing subunit, and a comparison result processing subunit, wherein:
the error block counting subunit is used for detecting the data blocks received and transmitted by each carrier frequency receiving and transmitting unit and respectively counting the number of the error data blocks received by each carrier frequency receiving and transmitting unit;
the threshold value comparing subunit is used for comparing the number of the error data blocks received by a certain frequency transceiving unit counted by the error block counting subunit with a preset threshold value and transmitting a comparison result to the comparison result processing subunit;
the comparison result processing subunit is configured to notify the base station subsystem of the result when the comparison result received by the comparison result processing subunit from the threshold comparison subunit indicates that a certain number of error data blocks has exceeded a predetermined threshold.
Correspondingly, the invention also provides a method for detecting the wireless transmission error, which comprises the following steps:
(a) the base station subsystem and the mobile station transmit data blocks on at least two carrier frequencies;
(b) the mobile station detects and counts the number of the error data blocks received by each carrier frequency, and informs the base station subsystem when a certain number of error data blocks appear at a certain carrier frequency.
Preferably, the step (b) comprises:
(b1) the mobile station detects the data block transmitted on each carrier frequency and respectively counts the number of error data blocks transmitted on each carrier frequency;
(b2) the mobile station compares the number of error data blocks of each statistic with a preset threshold value;
(b3) and the mobile station informs the base station subsystem of the comparison result when the comparison result shows that the counted number of the error data blocks exceeds the preset threshold value.
The implementation of the invention has the following beneficial effects:
in the invention, when carrying out multi-carrier frequency data transmission technology, a counter is arranged for each carrier frequency to count error data blocks which are not correctly transmitted on the carrier frequency, and when the count exceeds a preset threshold value, the situation is reported to opposite terminal equipment. The peer device can take corresponding measures accordingly. Thereby not causing the waste of resources.
Drawings
Figure 1 is a block diagram of a GPRS communication system of the prior art;
FIG. 2 is a schematic diagram of a wireless transmission error detection apparatus according to the present invention;
FIG. 3 is a flow chart of a method for detecting a wireless transmission error of the present invention;
fig. 4 is a schematic structural diagram of a system for detecting wireless transmission errors according to the present invention.
Detailed Description
The invention provides a wireless transmission error detection device, a wireless transmission error detection system and a wireless transmission error detection method, which can detect errors occurring in transmission of a certain carrier frequency in downlink double-carrier (or multi-carrier) transmission, report the errors and timely process the errors.
Fig. 2 is a schematic structural diagram of a wireless transmission error detection apparatus according to the present invention; the following description will be made by taking the MS as an example. The wireless transmission error detection apparatus includes: a multi-carrier transceiver 21 and an error block detection processing unit 22.
The multi-carrier transceiver unit 21 includes more than two carrier transceiver units (denoted by carrier transceiver unit 1 to carrier transceiver unit n in the figure), and each carrier transceiver unit communicates with an opposite terminal device (e.g., BSS) on a carrier frequency.
The error block detection processing unit 22 is configured to detect and count the number of error data blocks received by each carrier frequency transceiver unit, and perform corresponding processing when a certain number of error data blocks occur in a certain carrier frequency transceiver unit. The method specifically comprises the following steps: an error block count subunit 220, a threshold comparison subunit 222, a comparison result processing subunit 224, and a storage subunit 226. Wherein:
in practical applications, the erroneous block counting subunit 220 may include a plurality of counters, each counter corresponds to one carrier frequency transceiving unit, and is configured to count the erroneous data blocks received by the carrier frequency transceiving unit, and when a certain carrier frequency transceiving unit receives an erroneous data block, add 1 to a value of the counter corresponding to the counter.
The threshold comparing subunit 222 is configured to compare the value of each counter in the erroneous block counting subunit 220 with a predetermined threshold, which may be stored in the storage subunit and preset, for example, 3 in one embodiment, although other values are also possible, and transmit the comparison result to the comparison result processing subunit 224.
The comparison result processing subunit 224 receives the comparison result of the threshold comparison subunit 222, and when the comparison result is that the value of a certain counter exceeds a predetermined threshold, performs processing, for example, notifies the opposite end device of the fact through the overloaded transceiver unit, and requests the opposite end device to retransmit the error data block, where the message for notifying the opposite end device may be, for example, Packet Downlink Ack/Nack, egprs Ack Downlink Ack/Nack, Packet Uplink Ack/Nack, or the like.
The storage sub-unit 226 is used for storing the data block received by the multi-carrier frequency transceiver unit 21 and a predetermined threshold.
Similarly, the wireless transmission error detection device may be disposed in the BSS, and the principle thereof is similar to that described above, and will not be described in detail herein.
Fig. 3 is a flow chart illustrating a method for detecting a wireless transmission error according to the present invention.
Step S302: the BSS and the MS adopt a downlink double-load (or multi-load) transmission technology to carry out data transmission, namely the BSS and the MS carry out data block transmission on at least two carrier frequencies, and in the BSS or the MS, each carrier frequency corresponds to a carrier frequency transceiver unit;
after the step, the error block detection processing unit detects and counts the number of error data blocks received by each carrier frequency transceiver unit, and performs corresponding processing when a certain number of error data blocks appear in a certain carrier frequency transceiver unit. The method comprises the following specific steps:
step S304: the error block counting subunit of the receiving party judges whether each received data block is an error data block (data block which is not successfully received); if the received data block is an error data block, in step S306, the counter value of the error block counting subunit corresponding to the carrier frequency receiving the error data block is incremented by 1; if not, the next received data block is continuously judged.
Step S308: the threshold value comparing subunit compares the value of the counter of the carrier frequency with a preset threshold value, and if the comparison result is that the threshold value is exceeded, the next step is carried out; otherwise, go to step S302. The predetermined threshold may be preset.
Step S310: when the comparison result indicates that a certain counter value exceeds a predetermined threshold, the comparison processing result unit performs corresponding processing, and for the MS, the MS may report to the BSS, may indicate in an existing ACK message (e.g., Packet Downlink ACK/Nack, EGPRS Packet Downlink ACK/Nack, Packet Uplink ACK/Nack, or the like), or may add a new message to indicate that a certain carrier frequency is in error. After receiving the message, the BSS may consider reassigning resources to the MS, e.g., releasing the faulty carrier frequency and selecting other available carrier frequencies for data transmission.
After the comparison result processing subunit performs corresponding processing, the counter exceeding the predetermined threshold is set to zero, and recounting is started.
And after each data transmission is finished, setting all counter values in the error block counting subunit to be zero.
Fig. 4 is a schematic structural diagram of a system for detecting wireless transmission errors according to the present invention. The system comprises a base station subsystem and a mobile station, wherein the base station subsystem communicates through a wireless network. Wherein,
the base station subsystem at least comprises a multi-carrier frequency transceiver unit 31 which comprises at least two carrier frequency transceiver units, and each carrier frequency transceiver unit performs data transmission with the mobile station on a carrier frequency.
The mobile station at least comprises a multi-carrier frequency transceiver unit 21 and an error block detection processing unit 22, wherein,
the multi-carrier frequency transceiver unit 21 includes at least two carrier frequency transceiver units, and each carrier frequency transceiver unit performs data transmission with the base station subsystem on a carrier frequency;
the erroneous block detection processing unit 22 is configured to detect and count the number of erroneous data blocks received by each carrier frequency transceiver unit, and perform corresponding processing (notify a base station subsystem) when a certain number of erroneous data blocks occur on a certain carrier frequency transceiver unit. Specifically, it may include: an error block count subunit 220, a threshold comparison subunit 222, a comparison result processing subunit 224, and a storage subunit 226. Wherein:
in practical applications, the erroneous block counting subunit 220 may include a plurality of counters, each counter corresponds to one carrier frequency transceiving unit, and is configured to count the erroneous data blocks received by the carrier frequency transceiving unit, and when a certain carrier frequency transceiving unit receives an erroneous data block, add 1 to a value of the counter corresponding to the counter.
The threshold comparing subunit 222 is configured to compare the value of each counter in the erroneous block counting subunit 220 with a predetermined threshold, which may be stored in the storage subunit and preset, for example, 3 in one embodiment, although other values are also possible, and transmit the comparison result to the comparison result processing subunit 224.
The comparison result processing subunit 224 receives the comparison result of the threshold comparison subunit 222, and when the comparison result is that the value of a certain counter exceeds a predetermined threshold, performs processing, for example, notifies the opposite end device of the fact through the overloaded transceiver unit, and requests the opposite end device to retransmit the error data block, where the message for notifying the opposite end device may be, for example, Packet Downlink Ack/Nack, egprs Ack Downlink Ack/Nack, Packet Uplink Ack/Nack, or the like.
The storage sub-unit 226 is used for storing the data block received by the multi-carrier frequency transceiver unit 21 and a predetermined threshold.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (15)
1. An apparatus for detecting wireless transmission errors, comprising:
the multi-carrier frequency transceiving unit comprises at least two carrier frequency transceiving units, and each carrier frequency transceiving unit is used for transceiving data on one carrier frequency;
and the error block detection processing unit is used for detecting and counting the number of the error data blocks received by each carrier frequency transceiving unit, and performing corresponding processing when a certain number of error data blocks appear on a certain carrier frequency transceiving unit.
2. The apparatus for detecting wireless transmission errors of claim 1, wherein the erroneous block detection processing unit further comprises an erroneous block counting subunit, a threshold value comparing subunit, and a comparison result processing subunit, wherein:
the error block counting subunit is used for detecting the data blocks received and transmitted by each carrier frequency receiving and transmitting unit and respectively counting the number of the error data blocks received by each carrier frequency receiving and transmitting unit;
the threshold value comparing subunit is used for comparing the number of the error data blocks received by a certain frequency transceiving unit counted by the error block counting subunit with a preset threshold value and transmitting a comparison result to the comparison result processing subunit;
the comparison result processing subunit is configured to perform corresponding processing when the comparison result received by the comparison result processing subunit from the threshold comparison subunit indicates that a certain number of error data blocks has exceeded a predetermined threshold.
3. The apparatus for detecting wireless transmission errors as claimed in claim 2, wherein the erroneous block counting sub-unit comprises at least two counters, each counter corresponding to a carrier transceiver unit for counting the erroneous data blocks received by the carrier transceiver unit.
4. The apparatus for detecting wireless transmission errors according to claim 3, wherein the comparison result processing subunit performs corresponding processing specifically as follows: and informing the comparison result to opposite terminal equipment through a multi-carrier frequency transceiving unit.
5. The apparatus for detecting radio transmission errors according to any of claims 1 to 4, wherein the apparatus for detecting radio transmission errors is provided in a mobile station or a base station subsystem.
6. A method for detecting a wireless transmission error, comprising the steps of:
(a) the multi-carrier frequency receiving and transmitting unit transmits data blocks on at least two carrier frequencies, wherein each carrier frequency corresponds to a carrier frequency receiving and transmitting unit;
(b) the error block detection processing unit detects and counts the number of error data blocks received by each carrier frequency transceiver unit, and performs corresponding processing when a certain number of error data blocks appear in a certain carrier frequency transceiver unit.
7. The method of claim 5, wherein the step (b) comprises:
(b1) the error block counting subunit detects the data blocks transmitted on each carrier frequency and respectively counts the number of the error data blocks transmitted by each carrier frequency;
(b2) the threshold comparison subunit compares the number of each statistical error data block with a preset threshold and transmits the comparison result to the comparison result processing subunit;
(b3) and the comparison result processing subunit performs corresponding processing when the received comparison result is that the counted number of the error data blocks exceeds the preset threshold value.
8. The method of claim 7, wherein the step (b1) is specifically as follows: the error block counting subunit detects the data blocks transmitted on each carrier frequency, and counts the number of the error data blocks transmitted on each carrier frequency by using a counter respectively.
9. The method according to claim 7, wherein the comparing result processing subunit in the step (b3) performs corresponding processing specifically as follows: and informing the comparison result to opposite terminal equipment through a multi-carrier frequency transceiving unit.
10. The method of claim 9, wherein in step (b3), the counter exceeding the predetermined threshold is set to zero after the sub-unit processes the comparison result accordingly.
11. The method of any of claims 6 to 10, further comprising: and after each data transmission is finished, setting the values of all counters in the error block counting subunit to be zero.
12. A system for detecting radio transmission errors, comprising a base station subsystem and a mobile station communicating therewith via a radio network,
the base station subsystem at least comprises a multi-carrier frequency transceiver unit which comprises at least two carrier frequency transceiver units, and each carrier frequency transceiver unit carries out data transmission with the mobile station on a carrier frequency;
the mobile station at least comprises a multi-carrier frequency receiving and transmitting unit and an error block detection processing unit, wherein,
the multi-carrier frequency transceiver unit comprises at least two carrier frequency transceiver units, and each carrier frequency transceiver unit performs data transmission with the base station subsystem on a carrier frequency;
the error block detection processing unit is used for detecting and counting the number of error data blocks received by each carrier frequency transceiver unit, and performing corresponding processing when a certain number of error data blocks appear on a certain carrier frequency transceiver unit.
13. The system for detecting wireless transmission errors of claim 12, wherein the erroneous block detection processing unit further comprises an erroneous block counting subunit, a threshold value comparing subunit, and a comparison result processing subunit, wherein:
the error block counting subunit is used for detecting the data blocks received and transmitted by each carrier frequency receiving and transmitting unit and respectively counting the number of the error data blocks received by each carrier frequency receiving and transmitting unit;
the threshold value comparing subunit is used for comparing the number of the error data blocks received by a certain frequency transceiving unit counted by the error block counting subunit with a preset threshold value and transmitting a comparison result to the comparison result processing subunit;
and the comparison result processing subunit is used for notifying the base station subsystem of the result when the comparison result received by the comparison result processing subunit and clipped from the threshold comparison subunit is that the number of certain error data blocks exceeds a preset threshold value.
14. A method for detecting a wireless transmission error, comprising the steps of:
(a) the base station subsystem and the mobile station transmit data blocks on at least two carrier frequencies;
(b) the mobile station detects and counts the number of the error data blocks received by each carrier frequency, and informs the base station subsystem when a certain number of error data blocks appear at a certain carrier frequency.
15. The method of claim 14, wherein the step (b) comprises:
(b1) the mobile station detects the data block transmitted on each carrier frequency and respectively counts the number of error data blocks transmitted on each carrier frequency;
(b2) the mobile station compares the number of error data blocks of each statistic with a preset threshold value;
(b3) and the mobile station informs the comparison result to the base station subsystem when the comparison result shows that the counted number of the error data blocks exceeds the preset threshold value.
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| CN105207839A (en) * | 2015-08-17 | 2015-12-30 | 浪潮(北京)电子信息产业有限公司 | Automatic test method for network retransmission design and device |
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| CN105207839A (en) * | 2015-08-17 | 2015-12-30 | 浪潮(北京)电子信息产业有限公司 | Automatic test method for network retransmission design and device |
| CN105207839B (en) * | 2015-08-17 | 2018-09-07 | 浪潮(北京)电子信息产业有限公司 | A kind of automatic test approach and device of network retransmission design |
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