CN1327725C - Method for realizing system information 7 in 3G system - Google Patents
Method for realizing system information 7 in 3G system Download PDFInfo
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- CN1327725C CN1327725C CNB2004100753106A CN200410075310A CN1327725C CN 1327725 C CN1327725 C CN 1327725C CN B2004100753106 A CNB2004100753106 A CN B2004100753106A CN 200410075310 A CN200410075310 A CN 200410075310A CN 1327725 C CN1327725 C CN 1327725C
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Abstract
The present invention relates to a method for realizing a system information 7 in a 3G system, which comprises that A) when an RNC (radio network controller) sends a renewal request of system information of the system information 7 to a Node b(a base station), the dispatching information of the system information 7 is provided, triggering source of an information block of the system information 7 is set as a Node B, and the information content is empty; B) after the node b receives the renewal request of the system information 7, the sending time of the system information 7 is determined according to the dispatching information provided by the RNC; when the sending time reaches, the content of the system information 7 is generated and broadcast in a plot in real time. With method of the present invention, UE can obtain present uplink interference level of the plot in real time, so that uplink access to can be carried out through transmitting correct power, and a success rate of the UE uplink access can be raised.
Description
Technical field
The present invention relates to wireless communication field, refer to a kind of implementation method of system message 7 in the 3G system especially.
Background technology
CDMA is a kind of spread spectrum mobile communication technology.Spread spectrum technic mainly applies to military communication in the early stage, because its remarkable performance also will obtain to use widely in the commercial communication field.Now there has been commercial cdma cellular mobile communication system to operate in the telecommunications network.
For improving the capacity of mobile communication system, cellular system is generally adopted.In cellular mobile telecommunication system, whole network is made of some sub-districts, different districts has different configuration attributes, such as the PLMN under the sub-district (Public Land Mobile Network, public land mobile network) zone, sub-district available channel type or the like.These attributes are only relevant with the sub-district usually, and it is little with the different user relation in the sub-district, in order effectively to improve the efficient of this category information of Network Transmission, generally adopt the mode of " broadcasting " in the various mobile communication system, promptly in the sub-district, set up broadcast channel BCH, the general information of periodic broadcast sub-district.The travelling carriage that enters this sub-district just can obtain the essential information of sub-district, thereby finish the general controls of network terminal to the user of this sub-district by receiving broadcast channel.
In all system messages, comprised information and UE (subscriber equipment) required timer and constant under connection and idle pulley of Non-Access Stratum in the system message 1 (SIB1); Comprised the affiliated URA sign in sub-district in the system message 2 (SIB2); The selection and the reselecting parameters that have comprised the sub-district in system message 3 (SIB3) and the system message 4 (SIB4); Comprised district common channel information in system message 5 (SIB5) and the system message 6 (SIB6); Comprised fast-changing parameters such as dynamically adhering to rank and uplink interference level in the system message 7 (SIB7).
Node B (base station) is in order to pass through these System information blocks of broadcasting of period of broadcast channel, need at first know the information of these System information blocks, such as the cycle of each System information block, other schedule information of the content of System information block and System information block, wherein most information is that RNC sends to Node B by SYSTEMINFORMATION UPDATE REQUEST message, after Node B receives this message, parameter wherein is saved in the internal memory of oneself, according to wherein schedule information when the time arrives with the content of each System information block the UE that is broadcast to by SYSTEM INFORMATION message cycle.
According to describing among the 3GPP agreement TS25.433, for Node B need be by BCH broadcasting the content of System information block, RNC promptly can send to Node B by SYSTEM INFORMATION UPDATEREQUEST message, also can tell Node B, oneself is obtained by Node B.But must oneself can obtain at this situation Node B, if Node B can not oneself obtain, Node B can return failure to RNC so.
At most of System information block, Node B can't obtain, and such as SIB1, SIB5 etc., but at SIB7, the content among the SIB7 can be finished by Node B.Not offering some clarification on System information block 7 on the agreement is to be finished by RNC, is still finished by Node B, and existing implementation is to finish filling in of system message 7 contents by RNC.
According to agreement TS25.331 as can be known, comprised following several contents in the system message 7:
UL interference (uplink interference level);
PRACHs listed in system information block type 5/6 (PRACH tabulation);
Dynamic persistence level (PRACH dynamically adhere to rank);
Expiration Time Factor (chronon);
RNC provides the content of above Several Parameters if desired, so
1) at uplink interference level, uplink interference level has reflected the phase mutual interference of transmitting power between the UE in the sub-district, and how much relevant with the transmitting power of UE UE's is in this value and the sub-district, is an amount that dynamic change is very fast.RNC has only by the Received Total Wide Band Power among the public-measurement report COMMONMEASUREMENT REPORT in cycle and realizes in order to obtain this value.
2) at PRACH tabulation, RNC can obtain easily, and this parameter is identical with content in the system message 5/6.
3) dynamically adhere to rank at PRACH, this value has determined the connection success rate of UE in random access procedure, dynamic this value of adjustment can be regulated the up access capability of whole sub-district UE, according to analysis, this value should be relevant with the number of users in the sub-district, RNC can dispose this value dynamically or also can pass through to calculate acquisition by the Received Total Wide BandPower in the public-measurement report for this value is provided by OMC.
4) at chronon, this value has determined how long UE need read primary system message 7, and according to agreement TS25.331 as can be known, the content of UE read system message 7 realizes by timer:
Expiration timer=MAX ([320ms], SIB_REP*ExpirationTimeFactor) (formula 1)
Wherein timer duration Expiration timer is relevant with Expiration Time Factor (chronon) with SIB_REP (dispatching cycle of SIB7).According to stipulating in the agreement that it is 1 that this value can adopt default value, just 2times.
By above method, RNC can realize the acquisition to all data of SIB7.
Above-mentionedly obtain all data of SIB7 by RNC, shortcoming is as follows:
According to above-mentioned formula 1, UE is the content in the periodic read system message 7, and after timer expiry, UE can think automatically that system message 7 contents of being preserved before own are invalid, and the content of read system message 7 again.We can know according to the description on the agreement, and the content change in the system message 7 is very fast, are Millisecond basically.
Since each system message update after, UTRAN needs to notify UE to carry out the renewal of System information block by beep-page message, in order to guarantee on PCH, correctly to handle beep-page message, require RNC transmitting system information updating to time interval of Node B can not be less than DRX (discontinuous reception) Cycle Length of UTRAN maximum (promptly 2
9* 10ms=5.12s), that is to say that the frequency of RNC transmitting system information updating request can not be less than 5.12 seconds.If, obviously can't satisfy the content in the UE real-time acquisition system message 7 so the content update in the system message 7 is finished by RNC.
According to describing among the agreement TS25.331, the uplink interference level in the system message 7 has determined the initial uplink transmitting power of UE, can be referring to formula:
Preamble_Initial_Power=Primary CPICH DL TX power-CPICH_RSCP+UL interference+Constant Value (formula 2)
Wherein:
The up Initial Trans of Preamble_Initial_Power:UE;
Primary CPICH DL TX power: Primary Common Pilot Channel down transmitting power;
CPICH_RSCP: the channel receiving code power of Common Pilot Channel;
UL interference: uplink interference level;
Constant Value: constant value;
If UE can not obtain uplink interference level in real time accurately, so UE just can not be according to current condition correct adjusting uplink transmission power, direct, the most tangible result who causes is exactly that UE can't uply insert, and also just can't successfully call out in time.
Summary of the invention
The invention provides a kind of implementation method of system message 7, finish the particular content of system message 7 by Node B, RNC is the schedule information of sending system message 7 only.
The inventive method comprises the following steps:
A) RNC (radio network controller) provides the schedule information of system message 7 when the information updating request of Node B (base station) transmitting system message 7, and the triggering source of the message blocks of system message 7 is set to Node B, and message content is empty;
B) after Node B received system message 7 update requests, the schedule information that provides according to RNC was determined the transmitting time of system message 7, and after transmitting time arrived, the content of generation system message 7 was also broadcasted in the sub-district in real time.
According to said method of the present invention, described schedule information comprises: message blocks section repetition period, message blocks fragment position and hop count.
According to said method of the present invention, described step B comprises: the System Frame Number of determining Node B transmitting system message 7 according to described message blocks section repetition period, message blocks fragment position, when the System Frame Number time arrived, the content of real-time generation system message 7 was also broadcasted in the sub-district.
According to said method of the present invention, the content in the described real-time generation system message 7 comprises following concrete steps:
31) decode system message 5 and system message 6 are obtained PRACH (Physical Random Access Channel) list content;
32) Node B obtains the current uplink interference level of sub-district;
33) dynamically adhere to the rank and the timer factor according to what the uplink interference level that obtains calculated PRACH.
Described step 33 comprises: what pre-set uplink interference level and PRACH in Node B dynamically adheres to other correspondence table of level, searches this correspondence table according to the uplink interference level of current acquisition, and what obtain PRACH dynamically adheres to rank.
Adopt the inventive method, UE can obtain the current uplink interference level in sub-district, thereby carries out up access by launching correct power, effectively improves the up access success rate of UE.
Embodiment
RNC sends to and comprises following content in the system message update request of Node B:
(1) the sub-district ID that need upgrade;
(2) the message blocks type of Geng Xining comprises MIB (main message blocks), SIB (System information block) and SB (system message Scheduling Block);
(3) the triggering source SIB Originator of System information block describes according to agreement TS25.433, and the triggering source of System information block can be RNC, also can be Node B;
(4) the repetition period IB SG REP of message blocks;
(5) the fragment position IB SG POS of message blocks;
(6) segment type Segment type;
(7) section content IB SG DATA;
In the present invention, when RNC transmitting system information updating request message is given Node B, SIB Originator at system message 7, it is set to Node B, section content IB SG DATA be sky (promptly not the particular content of transmitting system message 7), the schedule information of system message 7 only is provided by RNC, such as IB SG REP, IB SG POS or the like.
After Node B received such system message update request, the content of discovery system message 7 need be finished by Node B and fill in (because SIB Originator is set to Node B), the content in the then own generation system message 7.Concrete generation method is as follows:
1) Node B at first needs by the content in the decode system message 5/6, according to the PRACH system information list information in system message 5/6 content, just can obtain the parameter of system message 7: PRACHs listed in system information block type 5/6 (PRACH tabulation); The system message that system message 5 and system message 6 have been preserved for Node B, or the system message of latest update.
2) Node B determines the time SFN (System Frame Number) of transmitting system message blocks according to IB SG REP in the system message update request and IB SG POS, arrive the time of transmitting system message 7 as SFN after, Node B obtains the uplink interference of current area, according to uplink interference UL interference, dynamically adhere to the rank (Dynamic persistence level) and the timer factor (Expiration Time Factor) by what calculate to obtain PRACH.NODEB has just obtained all the elements in the system message 7 like this, and the SYSTEM INFORMATION message by the UU interface is broadcast to all UE in the sub-district at this SFN.
Wherein, calculating the rank of dynamically adhering to that obtains PRACH according to uplink interference UL interference can obtain by the mode of tabling look-up.
For example: the span of uplink interference level is (110～-70) dbm, and adhere to that dynamically other span of level is (1～8), adhere to that dynamically the purpose that rank exists is the up access of restriction UE, this value is big more, UE is not easy access network more so, so the simplest mode is a linear relationship, as following table:
| Uplink interference level dbm | Dynamically adhere to rank |
| -110～-105 | ?8 |
| -104～-100 | ?7 |
| -99～-95 | ?6 |
| -94～-90 | ?5 |
| -89～-85 | ?4 |
| -84～-80 | ?3 |
| -79～-75 | ?2 |
| -74～-70 | ?1 |
By above description as can be known, content in the system message 7 all is fast-changing parameter, especially uplink interference level, this parameter is directly related with the transmitted power of the UE number of current area and each UE, and this value also needs dynamic variation when the UE of sub-district number and UE transmit power variation.The inventive method is to be finished the filling in of system message 7 contents by Node B, and Node B can obtain uplink interference level easily by measuring, and aspect the real-time that obtains this parameter, RNC can't meet the demands.
In addition, UE is the content that regularly obtains in the system message 7, UE the emission leading carry out up access in, its initial transmissions is just relevant with uplink interference level, have only UE to obtain the uplink interference level of current area in time, could carry out up access by launching correct power, the demodulation that Node B could be correct is from the uplink access preamble of UE like this.The inventive method because the uplink interference level that obtains is real-time, just can improve the success rate of the up access of UE to a great extent, has reduced the refusal number of times of Node B to this UE, guarantees that UE can finish calling smoothly in this sub-district.
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 claims.
Claims (5)
1, the implementation method of a kind of system message 7 in the 3G system comprises the following steps:
A) the RNC radio network controller provides the schedule information of system message 7 when the system message update request of base station node B transmitting system message 7, and the triggering source of the message blocks of system message 7 is set to Node B, and message content is empty;
B) after Node B received system message 7 update requests, the schedule information that provides according to RNC was determined the transmitting time of system message 7, and after transmitting time arrived, the content of generation system message 7 was also broadcasted in the sub-district in real time.
2, the method for claim 1 is characterized in that: described schedule information comprises: message blocks section repetition period, message blocks fragment position and hop count.
3, method as claimed in claim 2, it is characterized in that: described step B comprises: the System Frame Number of determining Node B transmitting system message 7 according to described message blocks section repetition period, message blocks fragment position, when the System Frame Number time arrived, the content of real-time generation system message 7 was also broadcasted in the sub-district.
4, method as claimed in claim 3 is characterized in that: the content in the described real-time generation system message 7 comprises following concrete steps:
31) decode system message 5 and system message 6 are obtained the Physical Random Access Channel list content;
32) Node B obtains the current uplink interference level of sub-district;
33) dynamically adhere to the rank and the timer factor according to what the uplink interference level that obtains calculated Physical Random Access Channel.
5, method as claimed in claim 4, it is characterized in that: described step 33 comprises: in Node B, pre-set uplink interference level and Physical Random Access Channel dynamically adhere to the level other correspondence table, search this correspondence table according to the uplink interference level of current acquisition, what obtain Physical Random Access Channel dynamically adheres to rank.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100753106A CN1327725C (en) | 2004-08-27 | 2004-08-27 | Method for realizing system information 7 in 3G system |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100753106A CN1327725C (en) | 2004-08-27 | 2004-08-27 | Method for realizing system information 7 in 3G system |
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| CN1741634A CN1741634A (en) | 2006-03-01 |
| CN1327725C true CN1327725C (en) | 2007-07-18 |
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| CNB2004100753106A Expired - Fee Related CN1327725C (en) | 2004-08-27 | 2004-08-27 | Method for realizing system information 7 in 3G system |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101212795B (en) * | 2006-12-29 | 2014-06-25 | 电信科学技术研究院 | Method and device for changing system message |
| CN101562880B (en) * | 2008-04-18 | 2011-04-27 | 大唐移动通信设备有限公司 | Method for sending and processing interference reference information as well as system and device thereof |
| CN101562879B (en) * | 2008-04-18 | 2012-10-03 | 电信科学技术研究院 | Method for sending and processing interference reference information as well as system and device thereof |
| CN101621840A (en) * | 2008-07-03 | 2010-01-06 | 中兴通讯股份有限公司 | Sending method of system information |
| CN101651891B (en) * | 2008-08-13 | 2012-05-09 | 中兴通讯股份有限公司 | System message updating method |
| CN101686090B (en) * | 2008-09-22 | 2011-04-20 | 中兴通讯股份有限公司 | System message receiving and transmitting method of earthquake |
| CN102625249B (en) * | 2012-03-05 | 2015-02-18 | 电信科学技术研究院 | Method and equipment for transmitting trunking session information |
| CN103428778B (en) * | 2012-05-18 | 2016-08-03 | 华为技术有限公司 | Uplink transmission parameter system of selection and equipment |
| WO2014166054A1 (en) * | 2013-04-09 | 2014-10-16 | 华为技术有限公司 | Power control method and device |
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| WO2002067462A1 (en) * | 2001-02-16 | 2002-08-29 | Motorola, Inc. | Gps assistance messages in cellular communications networks and methods therefor |
| CN1505416A (en) * | 2002-11-29 | 2004-06-16 | 华为技术有限公司 | System information receiving and reassembling method in the third generation wireless communication system |
| WO2004057787A2 (en) * | 2002-12-20 | 2004-07-08 | Nokia Corporation | Method and apparatus for controlling communication between user equipment and a base station in a radio access network |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002067462A1 (en) * | 2001-02-16 | 2002-08-29 | Motorola, Inc. | Gps assistance messages in cellular communications networks and methods therefor |
| CN1505416A (en) * | 2002-11-29 | 2004-06-16 | 华为技术有限公司 | System information receiving and reassembling method in the third generation wireless communication system |
| WO2004057787A2 (en) * | 2002-12-20 | 2004-07-08 | Nokia Corporation | Method and apparatus for controlling communication between user equipment and a base station in a radio access network |
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