CN102802168B - Network access parameter adjusting method, device and base station - Google Patents
Network access parameter adjusting method, device and base station Download PDFInfo
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- CN102802168B CN102802168B CN201110138331.8A CN201110138331A CN102802168B CN 102802168 B CN102802168 B CN 102802168B CN 201110138331 A CN201110138331 A CN 201110138331A CN 102802168 B CN102802168 B CN 102802168B
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Abstract
The invention discloses a network access parameter adjusting method, device and base station. The method comprises the following steps that: the base station receives an access test message sent by each terminal and extracts an access serial number and an access test number from the access test message; according to the access serial number, the access test number, the access success ratio and the thermal noise increment, the network access parameter is adjusted. The method gives comprehensive consideration to the access success ratio and the reverse link interference of the base station, when the access success ratio is high and the thermal noise increment is high, the network parameter is properly decreased; when the access success ratio is low and the thermal noise increment is low, the network parameter is properly increased, and therefore the access time of the terminal can be shorted as possible, the access success ratio of the terminal can be improved, and simultaneously the interference to the reverse link of the base station can be reduced.
Description
Technical field
The present invention relates to communication technical field, especially, relate to a kind of network access parameters method of adjustment, device and base station.
Background technology
In a cdma system, if terminal originated calls or paged, terminal needs to send access exploration (Access Probe) at access channel and initiates access procedure, to obtain Traffic Channel and the related resource of base station assigns.
At present, terminal uses open Loop Power control mode in the process sending access exploration, and arranging the Initial Trans impact of terminal of access parameter is very large.If access parameter be arranged so that terminal initial transmitting power is too high, be then linked into network than being easier to, but the reverse interference that can cause base station is too large, the reverse capacity of influential system; If access parameter be arranged so that terminal initial transmitting power is too low, then terminal may need to launch repeatedly access exploration and just can be linked into network, thus affects turn-on time and the access success rate of terminal.
Summary of the invention
The technical problem that the present invention will solve is to provide a kind of network access parameters method of adjustment, device and base station, improves access success rate when not increasing base station backward link interference.
According to an aspect of the present invention, propose a kind of network access parameters method of adjustment, comprise the access exploration message that base station receives the transmission of each terminal, and the access sequence numbering extracted in access exploration message and access exploration numbering; Number, access exploration numbered, access the rise-over-thermal adjustment network access parameters of success rate and base station according to access sequence.
According to a further aspect in the invention, also proposed a kind of network access parameters adjusting device, comprise numbering extraction unit, for receiving the access exploration message that each terminal sends, and the access sequence numbering extracted in access exploration message and access exploration numbering; Parameter adjustment unit, is connected with numbering extraction unit, for according to access sequence numbering, access exploration numbering, access success rate and base station rise-over-thermal adjustment network access parameters.
According to another aspect of the invention, also been proposed a kind of base station, comprise aforementioned network access parameter adjusting device.
Network access parameters method of adjustment provided by the invention, device and base station, access success rate and base station backward link interference are considered, when accessing success rate and be higher and rise-over-thermal being higher, the size of suitable downward network access parameters, when accessing success rate and be lower and rise-over-thermal being less, the size of suitable rise network access parameters, thus can access time of terminal shortened as far as possible and while improving the access success rate of terminal, reduce the interference to base station backward link.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a application's part.In the accompanying drawings:
Fig. 1 is the calculating schematic diagram of access parameter Interference_correction.
Fig. 2 is the schematic flow sheet of an embodiment of network access parameters method of adjustment of the present invention.
Fig. 3 is the structural representation of an embodiment of network access parameters adjusting device of the present invention.
Fig. 4 is the structural representation of another embodiment of network access parameters adjusting device of the present invention.
Fig. 5 is the structural representation of the another embodiment of network access parameters adjusting device of the present invention.
Embodiment
With reference to the accompanying drawings the present invention is described more fully, exemplary embodiment of the present invention is wherein described.Exemplary embodiment of the present invention and explanation thereof for explaining the present invention, but do not form inappropriate limitation of the present invention.
Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the present invention and application or use.
The present invention is described for CDMA access procedure.
At terminal originated calls or when being exhaled, first need the process initiating an access network at access channel, to obtain Traffic Channel and the related resource of base station assigns.For avoiding accessing the congested of channel, terminal is before startup Access Probe Sequence, and need to perform continuation and detect, this continuation detects the probability that can reduce each terminal access exploration and arrive simultaneously.Detect by rear in continuation, the access exploration that terminal is increased progressively by transmitted power completes access procedure.Only have when terminal sends the response message receiving base station after certain access exploration, just stop the transmission of access exploration.
The transmitting power of terminal initial access exploration is the function of the signal strength signal intensity that terminal receives, if the signal that terminal receives is strong, then illustrate that distance base station is near, corresponding access exploration power is just less.Once receive the response of base station, terminal then adopts the power of last access exploration to carry out message transmission.
Particularly, the account form of 1x terminal access exploration initial power is:
T
X＝-Mean_input_power
+Offset_power
+Interference_correction
+NOM_PWRs-16×NOM_PWR_EXTs (1)
+INIT_PWRs
+PWR_LVL×PWR_STEPs
This formula represents that the Initial Trans of terminal is relevant with related access parameter to the mean receiving power of terminal, wherein, Mean_input_power represents the mean receiving power of terminal, Offset_power represents power back-off, NOM_PWRs represents the difference compensating front reverse link, NOM_PWR_EXTs represents the skew of correction base station transmitting power relative to nominal power, INIT_PWRs is correction factor, for improving access success rate, PWR_LVL represents the counting sending access exploration number of times and increase, PWR_STEPs represents that each access exploration increases progressively the size of power, Interference_correction=min (max (-7-E
c/ I
0, 0), 7) be receive the intensity of pilot tone and the interference correction factor introduced according to terminal present position, wherein, E
crepresent the chip energy of useful signal, I
0represent and receive gross power, its curve as shown in Figure 1.
The account form of DO terminal access exploration initial power is:
X
i＝-Rx+OpenLoopAdjust+Pr obeInitialAdjust+(i-1)×PowerStep(2)
Wherein, X
irepresent that terminal sends i-th power soundd out, Rx represents the mean receiving power of terminal, OpenLoopAdjust represents that terminal uses this parameter to estimate pilot signal open loop average output power X0 during Access Probe, Pr obeInitialAdjust represents that open loop power estimates correction factor, and PowerStep represents the step-length of adjustment.
In the access way of above-mentioned cdma system, fixing access parameter is adopted to carry out the initial power that computing terminal sends access exploration, due to the irrelevance of environmental change and uplink downlink, terminal calculates the mode of access exploration initial power according to received power, may cause under some base station, the initial access exploration transmitting power of terminal is too high, has a strong impact on base station backward link capacity, or the initial access exploration transmitting power of terminal is too low, cause turn-on time long low with access success rate.Therefore, the present invention proposes a kind of network access parameters method of adjustment, device and base station to overcome the defect that cdma system calculates the existence of access exploration Initial Trans.
Fig. 2 is the schematic flow sheet of an embodiment of network access parameters method of adjustment of the present invention.
As shown in Figure 2, this embodiment can comprise the following steps:
S202, base station receives the access exploration message that each terminal sends, and the access sequence numbering extracted in access exploration message and access exploration numbering, such as, access exploration message can be the Origination Message message of 1x system or the Connection Request message of DO system;
S204, numbers, access exploration is numbered, accesses the rise-over-thermal adjustment network access parameters of success rate and base station according to access sequence.
This embodiment has considered access success rate and base station backward link interference, when accessing success rate and be higher and rise-over-thermal being higher, the size of suitable downward network access parameters, when accessing success rate and be lower and rise-over-thermal being less, the size of suitable rise network access parameters, thus can access time of terminal shortened as far as possible and while improving the access success rate of terminal, reduce the interference to base station backward link.
For 1x system, two fields can be increased in the Origination Message message of 1x system, SEQ_TIMS and PROBE_TIMS, (in the Connection Request message of DO system, above-mentioned two fields are also correspondingly increased, as described in Table 4) as Suo Shi following table 1-table 3.Wherein, SEQ_TIMS represents the numbering of terminal access sequence, PROBE_TIMS represents the numbering sending access exploration in certain access sequence, terminal can be numbered these two territories according to the transmission situation of access exploration when sending access exploration, if terminal is when needs are linked into network, first access sequence send out first time send access exploration time, SEQ_TIMS is numbered 0, PROBE_TIMS is numbered 0.1x base station when receiving the Origination Message of terminal (be Connection Request for DO system) message, the numbering situation of SEQ_TIMS and PROBE_TIMS of each access of record.By the rise-over-thermal of access success rate corresponding to periodic statistics SEQ_TIMS and PROBE_TIMS and base station, base station judges that whether suitable the access parameter of base station arranges.In addition, initial access parameter mainly adopts the mode of default parameters.
Origination Message message field:
| Field | Length(Bits) |
| MOB_TERM | 1 |
| SLOT_CYCLE_INDEX | 3 |
| MOB_P_REV | 8 |
| SCM | 8 |
| REQUEST_MODE | 3 |
| SPECIAL_SERVICE | 1 |
| SERVICE_OPTION | 0or 16 |
| PM | 1 |
| DIGIT_MODE | 1 |
| NUMBER_TYPE | 0or 3 |
| NUMBER_PLAN | 0or 4 |
| MORE_FIELDS | 1 |
| NUM_FIELDS | 8 |
Table 1
NUM_FIELDS field:
| chari | 4or 8 |
| NAR_AN_CAP | 1 |
| PACA_REORIG | 1 |
| RETURN_CAUSE | 4 |
| MORE_RECORDS | 1 |
| ENCRYPTION_SUPPORTED | 0or 4 |
| PACA_SUPPORTED | 1 |
| NUM_ALT_SO | 3 |
Table 2
NUM_ALT_SO field:
| ALT_SO | 16 |
| DRS | 0or 1 |
| UZID_INCL | 0or 1 |
| UZID | 0or 16 |
| CH_IND | 0or 2 |
| SR_ID | 0or 3 |
| OTD_SUPPORTED | 0or 1 |
| QPCH_SUPPORTED | 0or 1 |
| ENHANCED_RC | 0or 1 |
| FOR_RC_PREF | 0or 5 |
| REV_RC_PREF | 0or 5 |
| FCH_SUPPORTED | 0or 1 |
| FCH Capability Type-specific fields | 0or variable |
| DCCH_SUPPORTED | 0or 1 |
| DCCH Capability Type-specific fields | 0or variable |
| SEQ_TIMS | 4 |
| PROBE_TIMS | 4 |
| RESERVED | 0or 1 |
| REV_FCH_GATING_REQ | 0or 1 |
Table 3
Connection Request message field:
| Field | Length(bits) |
| MessageID | 8 |
| TransactionID | 8 |
| RequestReason | 4 |
| SEQ_TIMS | 4 |
| PROBE_TIMS | 4 |
| Reserved | 4 |
Table 4
In another embodiment of network access parameters method of adjustment of the present invention, the size of network access parameters can be adjusted by following step:
According to the access success rate that access sequence is numbered, access exploration numbering cycle adds up first access exploration of each terminal first access sequence, be with should be noted that, each terminal may need to send multiple access sequence in order to access network, but, in order to shorten turn-on time, only add up the access success rate of first access exploration of each terminal first access sequence;
The rise-over-thermal of calculation base station;
Rise-over-thermal according to the access success rate calculated and base station adjusts network access parameters.
Particularly, the rise-over-thermal of access success rate and base station can be compared with respective threshold value respectively; The upper limit of target access probability is greater than and the rise-over-thermal of base station to exceed on noise incremental quantity and to reduce in network access parameters correction factor in limited time (such as in access success rate, parameter INIT_PWRs in 1x system, parameter ProbeInitialAdjust in DO system) size, until access success rate not higher than the upper limit of target access probability; The lower limit of target access probability is less than and the rise-over-thermal of base station is less than the size increasing correction factor in network access parameters under noise incremental quantity in limited time, until access success rate is not less than the lower limit of target access probability in access success rate.
In one example, suppose the access target of base station design be first access exploration that terminal sends first access sequence succeed the probability of access be 60% ~ 80% (target access probability lower limit be 60% and the target access probability upper limit be the example of 80%), if actual count discovery terminal transmission first time access exploration succeeds, the probability of access is greater than 80%, and base station thermal noise increment (Rise-Over-Thermal, ROT) lifting is higher (wherein, ROT mainly considers whether access channel produces comparatively serious interference to base station on reverse link), such as, more than 6dB (the rise-over-thermal upper limit), in this case, the settings of network access parameters can suitably be lowered (such as in base station, parameter INIT_PWRs is lowered 1 ~ 3dB by 1x system, parameter ProbeInitialAdjust is lowered 1 ~ 3dB by DO system) to reduce the ROT of base station, otherwise, if first of terminal access exploration succeeds, the probability of access is less than 60%, and the ROT lifting of base station is lower, such as, be less than 3dB (rise-over-thermal lower limit), then the base station settings (such as, parameter INIT_PWRs is raised 1 ~ 3dB, DO system and parameter ProbeInitialAdjust is raised 1 ~ 3dB by 1x system) that suitably can raise network access parameters send access exploration to succeed the probability of access to improve first time.It is pointed out that target access probability lower limit and the target access probability upper limit can be configured according to user's request; The rise-over-thermal upper limit and rise-over-thermal lower limit can be configured according to system mode.
Alternatively, can also the number of access exploration in the number of pre-configured access sequence and each access sequence.Generally, in each access sequence, the number of access exploration is identical, and the random delay between such access sequence can reduce the probability of collision further.
Further, terminal is when sending access exploration message, and the transmission situation according to access sequence and access exploration is numbered access sequence and access exploration, and is filled in access exploration message; Terminal, after have sent the repeatedly access exploration of an access sequence, if do not receive the response message of base station, then starts the process of transmitting of next access sequence after delay one random time.The collision probability sending access exploration between different terminals can be effectively reduced by random delay, also access success rate can be improved to a great extent.
In addition, multiple access sequence can be used to realize accessing terminal, each access sequence can have multiple access exploration again, as first access sequence can carry out the transmission of 5 access explorations, if these 5 access explorations are all failed, then adopt second access sequence to proceed the transmission of access exploration after random delay, until certain receives the response of base station after once sending access exploration, just stop the transmission of access exploration.It is pointed out that multiple access sequence contents are herein identical, the time just sent is different, therefore called after N (1,2 ...) access sequence.
Fig. 3 is the structural representation of an embodiment of network access parameters adjusting device of the present invention.
As shown in Figure 3, the device 30 of this embodiment can comprise:
Numbering extraction unit 31, for receiving the access exploration message that each terminal sends, and the access sequence numbering extracted in access exploration message and access exploration numbering;
Parameter adjustment unit 32, is connected with numbering extraction unit, for according to access sequence numbering, access exploration numbering, access success rate and base station rise-over-thermal adjustment network access parameters.
Numbering extraction unit in this embodiment and parameter adjustment unit have considered access success rate and base station backward link interference, when accessing success rate and be higher and rise-over-thermal being higher, the size of suitable downward network access parameters, when accessing success rate and be lower and rise-over-thermal being less, the size of suitable rise network access parameters, thus can access time of terminal shortened as far as possible and while improving the access success rate of terminal, reduce the interference to base station backward link.
Fig. 4 is the structural representation of another embodiment of network access parameters adjusting device of the present invention.
As shown in Figure 4, compared with the embodiment in Fig. 3, the parameter adjustment unit 41 in the device 40 of this embodiment can comprise:
Success rate computation subunit 411, for adding up the access success rate of first access exploration of each terminal first access sequence according to access sequence numbering, access exploration numbering cycle;
Noise incremental quantity computation subunit 412, for the rise-over-thermal of calculation base station;
Adjustment subelement 413, is connected with noise incremental quantity computation subunit with success rate computation subunit, for the rise-over-thermal adjustment network access parameters according to the access success rate calculated and base station.
Fig. 5 is the structural representation of the another embodiment of network access parameters adjusting device of the present invention.
As shown in Figure 5, compared with the embodiment in Fig. 4, the adjustment subelement 51 in the device 50 of this embodiment can comprise:
Judge module 511, for comparing the rise-over-thermal of access success rate and base station with respective threshold value respectively;
First adjusting module 512, be connected with judge module, for being greater than the upper limit of target access probability in access success rate and the rise-over-thermal of base station to exceed on noise incremental quantity the size reducing correction factor in network access parameters in limited time, until access success rate is not higher than the upper limit of target access probability;
Second adjusting module 513, be connected with judge module, for being less than the lower limit of target access probability in access success rate and the rise-over-thermal of base station is less than the size increasing correction factor in network access parameters under noise incremental quantity in limited time, until access success rate is not less than the lower limit of target access probability.
Alternatively, above-mentioned network access parameters adjusting device can also comprise dispensing unit, for the number of access exploration in the number of pre-configured access sequence and each access sequence.
In an embodiment of base station of the present invention, in this embodiment, base station can comprise the network access parameters adjusting device 30,40 or 50 in previous embodiment.
Said apparatus embodiment of the present invention can realize the flow process of aforementioned corresponding method embodiment.
Although be described in detail specific embodiments more of the present invention by example, it should be appreciated by those skilled in the art, above example is only to be described, instead of in order to limit the scope of the invention.It should be appreciated by those skilled in the art, can without departing from the scope and spirit of the present invention, above embodiment be modified.Scope of the present invention is limited by claims.
Claims (6)
1. a network access parameters method of adjustment, is characterized in that, comprising:
Base station receives the access exploration message that each terminal sends, and the access sequence numbering extracted in described access exploration message and access exploration numbering;
Number, described access exploration numbered, access the rise-over-thermal adjustment network access parameters of success rate and base station according to described access sequence;
Wherein, according to the access success rate that described access sequence is numbered, described access exploration numbering cycle adds up first access exploration of each terminal first access sequence; The rise-over-thermal of calculation base station;
The rise-over-thermal of access success rate and base station is compared with respective threshold value respectively; The upper limit of target access probability is greater than and the rise-over-thermal of base station to exceed on noise incremental quantity the size reducing correction factor in network access parameters in limited time, until access success rate is not higher than the upper limit of target access probability in access success rate; The lower limit of target access probability is less than and the rise-over-thermal of base station is less than the size increasing correction factor in network access parameters under noise incremental quantity in limited time, until access success rate is not less than the lower limit of target access probability in access success rate.
2. network access parameters method of adjustment according to claim 1, is characterized in that, also comprise:
The number of access exploration in the number of pre-configured access sequence and each access sequence.
3. network access parameters method of adjustment according to claim 2, is characterized in that, also comprise:
Terminal is when sending described access exploration message, and the transmission situation according to access sequence and access exploration is numbered access sequence and access exploration, and is filled in described access exploration message;
Terminal, after have sent the repeatedly access exploration of an access sequence, if do not receive the response message of base station, then starts the process of transmitting of next access sequence after delay one random time.
4. a network access parameters adjusting device, is characterized in that, comprising:
Numbering extraction unit, for receiving the access exploration message that each terminal sends, and the access sequence numbering extracted in described access exploration message and access exploration numbering;
Parameter adjustment unit, is connected with described numbering extraction unit, for the rise-over-thermal adjustment network access parameters according to described access sequence numbering, described access exploration numbering, access success rate and base station;
Described parameter adjustment unit comprises:
Success rate computation subunit, for adding up the access success rate of first access exploration of each terminal first access sequence according to described access sequence numbering, described access exploration numbering cycle;
Noise incremental quantity computation subunit, for the rise-over-thermal of calculation base station;
Adjustment subelement, is connected with described noise incremental quantity computation subunit with described success rate computation subunit, for the rise-over-thermal adjustment network access parameters according to the access success rate calculated and base station;
Described adjustment subelement comprises:
Judge module, for comparing the rise-over-thermal of access success rate and base station with respective threshold value respectively;
First adjusting module, be connected with described judge module, for being greater than the upper limit of target access probability in access success rate and the rise-over-thermal of base station to exceed on noise incremental quantity the size reducing correction factor in network access parameters in limited time, until access success rate is not higher than the upper limit of target access probability;
Second adjusting module, be connected with described judge module, for being less than the lower limit of target access probability in access success rate and the rise-over-thermal of base station is less than the size increasing correction factor in network access parameters under noise incremental quantity in limited time, until access success rate is not less than the lower limit of target access probability.
5. network access parameters adjusting device according to claim 4, is characterized in that, described device also comprises:
Dispensing unit, for the number of access exploration in the number of pre-configured access sequence and each access sequence.
6. a base station, is characterized in that, comprises the network access parameters adjusting device described in claim 4 or 5.
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| CN110048811B (en) * | 2019-03-29 | 2021-12-07 | 深圳职业技术学院 | Low-delay information processing method and system in Internet of things and storage medium |
| CN110034911B (en) * | 2019-03-29 | 2021-12-07 | 深圳职业技术学院 | Method, system and storage medium for fast data transmission in Internet of things |
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| CN1511138A (en) * | 2000-12-22 | 2004-07-07 | ��ʽ�����װ | Access parameter adaptation and packet data resource management using detailed mobile status information |
| CN1862987A (en) * | 2005-08-16 | 2006-11-15 | 华为技术有限公司 | Method for determining reverse turn-on channel transmitting power in wireless communication system |
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| US7813753B2 (en) * | 2006-02-27 | 2010-10-12 | Qualcomm Incorporated | Power control in communication systems |
| US8265683B2 (en) * | 2008-08-07 | 2012-09-11 | Qualcomm Incorporated | Two-tier random backoff and combined random backoff and transmit power control in wireless networks |
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| CN1862987A (en) * | 2005-08-16 | 2006-11-15 | 华为技术有限公司 | Method for determining reverse turn-on channel transmitting power in wireless communication system |
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