CN101801032A - Indoor access method and communication system - Google Patents
Indoor access method and communication system Download PDFInfo
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- CN101801032A CN101801032A CN200910217521A CN200910217521A CN101801032A CN 101801032 A CN101801032 A CN 101801032A CN 200910217521 A CN200910217521 A CN 200910217521A CN 200910217521 A CN200910217521 A CN 200910217521A CN 101801032 A CN101801032 A CN 101801032A
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Abstract
The invention discloses an indoor access method, which comprises the following steps: setting carrier waves with the same frequency as outdoor carrier waves and carrier waves with the frequency different from the outdoor carrier waves indoors; and respectively setting channel quality thresholds of the same-frequency and different-frequency carrier waves. The method also comprises a step: after receiving a service request of a user terminal, acquiring the channel quality of the same-frequency or/and different-frequency carrier waves, comparing the acquired channel quality with the channel quality thresholds of the carrier waves, and determining carrier waves to which the service accesses for the user terminal according to a comparison result. The invention simultaneously discloses a communication system, which comprises a same-frequency transceiver and a different-frequency transceiver which are connected with a base station, wherein the same-frequency transceiver is used for transmitting and receiving the carrier waves with the same carrier frequency as an outdoor communication system; and the different-frequency transceiver is used for transmitting and receiving the carrier waves with the carrier frequency different from the outdoor communication system. The indoor access method and the communication system effectively improve the performance of indoor service communication.
Description
Technical field
The present invention relates to the carrier wave access technology of user terminal, relate in particular to a kind of indoor access method and communication system.
Background technology
EVDO (Evolution-Data Optimized) is a kind of third generation (3G) mobile communication system that designs for the high-speed radio Packet data service specially.The peak rate of this 3G technology forward link support reaches 3.1Mbps, and the peak rate of reverse link support reaches 1.8Mbps.Using the high-end customer of high-rate packets business, much all concentrate on office building contour level building, so strengthen indoor covering, guarantee the signal quality and the sector capacity of high speed packet service, is the inexorable trend of EVDO development.
Statistics shows; along with people's daily routines more and more concentrate on indoor; mobile subscriber's indoor communications behavior progressively increases; but the weak spot of the indoor network coverage often; build indoor distributed system and can effectively solve indoor covering problem, increase for operator brings fair margin of profit.
The use occasion of indoor covering mainly comprises indoor blind area, large-scale indoor place that telephone traffic is high and the indoor place that frequent switching takes place.Utilization is distributed in the antenna of indoor diverse location, and signal is evenly distributed on room area, thereby guarantees the indoor desirable covering that has.Sufficient traffic access amount is provided simultaneously, improves the local connection quality comprehensively, improve call completing rate, for the user offers high-quality service.
Among the present invention, with sub-district, carrier frequency place is that CELL0, working frequency points are that the work carrier wave (also being working frequency points) of f0 is expressed as CELL0-f0, and the acquiescence outdoor cell is CELL0, and indoor cell is CELL1, if indoor have a plurality of sub-districts, then be followed successively by CELL2, CELL3.......Among the present invention, the critical zone is closely adjacent place of expression indoor and outdoor, such as the window of floor, and the zones such as hall of low layer floor.
Cover relatively poor defective at above-mentioned indoor wireless signal, it is in indoor deployment and outdoor with carrier wave frequently that a solution is arranged, the working frequency points of supposing outdoor deployment is CELL0-f0, and critical zone, indoor two zones are all disposed with f0 frequency frequently, promptly all be CELL1-f0, the sub-district difference, but frequency is identical.Such benefit is not change direct-cut operation frequently, has only with the frequency soft handover, and can guarantee the coverage rate in indoor most of zone substantially.Shortcoming is: skyscraper is because relative altitude is higher, and the signal of the f0 frequency of some outdoor base stations can produce very strong interference to indoor homogenous frequency signal after arriving high level, causes pilot pollution; Because the critical zone outdoor signal is stronger, indoor signal also not a little less than, also interfere with each other between the homogenous frequency signal like this, form more intense Pilot Interference, cause poor signal quality; Occasions such as common office, a lot of emphasis overlay areas all are near window, just the serious zone of pilot pollution.So indoor and outdoor is not suitable for the skyscraper of emphasis overlay area in the critical zone with covering frequently.
Also having a solution is at indoor deployment alien frequencies carrier wave.Suppose that the outdoor signal working frequency points is CELL0-f0, and what dispose in critical zone and indoor two zones is the CELL1-f1 frequency, carrier wave and outdoor different has guaranteed that like this critical zone can insert from the alien frequencies frequency, guarantees the minimizing of pilot pollution situation.But also there is following shortcoming in this carrier wave deployment way: because some building telephone traffic is bigger, so have only a frequency may cause this alien frequencies frequency load excessive, forward direction speed is lower.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of indoor access method and communication system, can effectively improve the indoor communications performance.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of indoor access method, indoor setting and outdoor with frequently carrier wave and with the carrier wave of outdoor alien frequencies; Channel quality thresholds with frequency and alien frequencies carrier wave is set respectively; Described method also comprises:
After receiving the service request of user terminal, obtaining with frequently or the channel quality of alien frequencies carrier wave, compare with the channel quality thresholds of carrier wave, is the carrier wave that user terminal is determined service access according to comparative result.
Preferably, described and channel quality thresholds carrier wave compares, and is the carrier wave that user terminal is determined service access according to comparative result, comprising:
Will be with the channel quality of carrier wave and the channel quality thresholds of being somebody's turn to do with the frequency carrier wave compare frequently, if greater than channel quality thresholds, then further determine whether transship with the frequency carrier wave, indicating user terminal inserts the alien frequencies carrier wave if transship then, not transshipping then, indicating user terminal inserts with the frequency carrier wave;
If the channel quality with the frequency carrier wave is less than or equal to channel quality thresholds, determine then whether the alien frequencies carrier wave transships, indicating user terminal inserts the high carrier wave of fairness if transship then; If nonoverload, whether the channel quality of then judging the alien frequencies carrier wave greater than the channel quality thresholds of this alien frequencies carrier wave, if insert the alien frequencies carrier wave greater than indicating user terminal then, otherwise indicating user terminal inserts with carrier wave frequently.
Preferably, described and channel quality thresholds carrier wave compares, and is the carrier wave that user terminal is determined service access according to comparative result, comprising:
The channel quality of alien frequencies carrier wave and the channel quality thresholds of this alien frequencies carrier wave are compared, if be less than or equal to channel quality thresholds, then indicating user terminal inserts the high carrier wave of fairness;
If greater than channel quality thresholds, further determine whether transship with the frequency carrier wave, indicating user terminal inserts the alien frequencies carrier wave if transship then; If nonoverload, whether then further judge with the channel quality of carrier wave frequently greater than this with the channel quality thresholds of carrier wave frequently, if insert with carrier wave frequently greater than indicating user terminal then, if be less than or equal to channel quality thresholds with the frequency carrier wave, judge further then whether the alien frequencies carrier wave transships, indicating user terminal inserts the high carrier wave of fairness if transship then; If nonoverload, then indicating user terminal inserts the alien frequencies carrier wave.
Preferably, described overload is that the difference between the excited user number of the excited user number of carrier wave and alien frequencies carrier wave has exceeded user's number of threshold values of setting frequently together.
Preferably, described indicating user terminal inserts the high carrier wave of fairness, is specially the carrier wave that the carrier wave that following formula result of calculation is less inserts as user terminal:
| R0-R1|/(R0+R1), wherein, R0 represents that R1 represents the average user speed of alien frequencies f1 with the Mean Speed of frequency carrier wave f0; Calculating f0 | during the value of R0-R1|/(R0+R1), the number of users that calculates R0 is to add one on the current number of users that has inserted; Calculating f1 | during the value of R0-R1|/(R0+R1), the number of users that calculates R1 is to add one on the current number of users that has inserted.
Preferably, at least one in described channel quality and the following parameter is relevant: the received power of the signal to noise ratio of channel, receiving terminal channel, the error rate of channel.
A kind of communication system comprises with frequency receiver/transmitter and alien frequencies receiver/transmitter, and is described with receiver/transmitter and described alien frequencies receiver/transmitter are connected with the base station frequently; Wherein, the described receiver/transmitter of frequency together is used to send and reception and the identical carrier wave of outdoor communication system carrier frequency, and described alien frequencies receiver/transmitter is used to send and reception and the different carrier wave of outdoor communication system carrier frequency.
Preferably, after described base station receives the service request of user terminal, obtaining the channel quality with frequency or alien frequencies carrier wave, compare with the channel quality thresholds of setting, is the carrier wave that user terminal is determined service access according to comparative result.
Preferably, described base station is the carrier wave that user terminal is determined service access, comprising:
Will be with the channel quality of carrier wave and the channel quality thresholds of being somebody's turn to do with the frequency carrier wave compare frequently, if greater than channel quality thresholds, then further determine whether transship with the frequency carrier wave, indicating user terminal inserts the alien frequencies carrier wave if transship then, not transshipping then, indicating user terminal inserts with the frequency carrier wave;
If the channel quality with the frequency carrier wave is less than or equal to channel quality thresholds, determine then whether the alien frequencies carrier wave transships, indicating user terminal inserts the high carrier wave of fairness if transship then; If nonoverload, whether the channel quality of then judging the alien frequencies carrier wave greater than the channel quality thresholds of this alien frequencies carrier wave, if insert the alien frequencies carrier wave greater than indicating user terminal then, otherwise indicating user terminal inserts with carrier wave frequently.
Preferably, described base station is the carrier wave that user terminal is determined service access, comprising:
The channel quality of alien frequencies carrier wave and the channel quality thresholds of this alien frequencies carrier wave are compared, if be less than or equal to channel quality thresholds, then indicating user terminal inserts the high carrier wave of fairness;
If greater than channel quality thresholds, further determine whether transship with the frequency carrier wave, indicating user terminal inserts the alien frequencies carrier wave if transship then; If nonoverload, whether then further judge with the channel quality of carrier wave frequently greater than this with the channel quality thresholds of carrier wave frequently, if insert with carrier wave frequently greater than indicating user terminal then, if be less than or equal to channel quality thresholds with the frequency carrier wave, judge further then whether the alien frequencies carrier wave transships, indicating user terminal inserts the high carrier wave of fairness if transship then; If nonoverload, then indicating user terminal inserts the alien frequencies carrier wave.
Preferably, described overload is that the difference between the excited user number of the excited user number of carrier wave and alien frequencies carrier wave has exceeded user's number of threshold values of setting frequently together.
Preferably, described indicating user terminal inserts the high carrier wave of fairness, the carrier wave that specifically that following formula result of calculation is less carrier wave inserts as user terminal:
| R0-R1|/(R0+R1), wherein, R0 represents that R1 represents the average user speed of alien frequencies f1 with the Mean Speed of frequency carrier wave f0; Calculating f0 | during the value of R0-R1|/(R0+R1), the number of users that calculates R0 is to add one on the current number of users that has inserted; Calculating f1 | during the value of R0-R1|/(R0+R1), the number of users that calculates R1 is to add one on the current number of users that has inserted.
Preferably, at least one in described channel quality and the following parameter is relevant: the received power of the signal to noise ratio of channel, receiving terminal channel, the error rate of channel.
Among the present invention, by indoor setting and outdoor with frequently carrier wave and the carrier wave of alien frequencies, when indoor user terminal carries out service access, select corresponding access carrier according to the residing position of user terminal for it, like this, both avoid the pilot pollution of indoor critical zone, guaranteed the service communication quality of user terminal; In addition, the setting of alien frequencies carrier wave, the balanced effectively service access of user terminal can not cause carrier load overweight and cause user terminal can not carry out service access.The present invention effectively improves the performance of indoor service communication.
Description of drawings
Fig. 1 is the composition structural representation of communication system of the present invention;
Fig. 2 is the flow chart of indoor access method of the present invention.
Embodiment
Basic thought of the present invention is: by indoor setting and outdoor with frequently carrier wave and the carrier wave of alien frequencies, when indoor user terminal carries out service access, select corresponding access carrier according to the residing position of user terminal for it, like this, both avoid the pilot pollution of indoor critical zone, guaranteed the service communication quality of user terminal; In addition, the setting of alien frequencies carrier wave, the balanced effectively service access of user terminal can not cause carrier load overweight and cause user terminal can not carry out service access.
Fig. 1 is the composition structural representation of communication system of the present invention, and as shown in Figure 1, communication system of the present invention comprises with frequency receiver/transmitter 10 and alien frequencies receiver/transmitter 11, and is described with receiver/transmitter 10 and described alien frequencies receiver/transmitter 11 are connected with base station 12 frequently; Wherein, the described receiver/transmitter 10 of frequency together is used to send and reception and the identical carrier wave of outdoor communication system carrier frequency, and described alien frequencies receiver/transmitter 11 is used to send and reception and the different carrier wave of outdoor communication system carrier frequency.
Concrete, with receiver/transmitter 10 and alien frequencies receiver/transmitter 11 can be by dried station or the relay stations put that links to each other with the base station frequently, merit is divided amplifier, and corresponding antenna is realized.Put the station or relay station is positioned near the building with dried, divide amplifier to be arranged at signal a plurality of merits and cover in the not good room, and dual-mode antenna divides amplifier to be connected with each merit, wherein, merit divides amplifier to be used for receiving and transmitting signal is amplified, to reach and the identical intensity of outdoor covering signal.
Below in conjunction with the communication system among Fig. 1, describing the present invention in detail is how to realize professional indoor access, by the description of the indoor service access of the present invention, will fully disclose the concrete mode of the work realization of above-mentioned communication system.
Fig. 2 is the flow chart of indoor access method of the present invention, and as shown in Figure 2, indoor access method of the present invention comprises:
Step 201: indoor setting and outdoor with frequently carrier wave and with the carrier wave of outdoor alien frequencies; Channel quality thresholds with frequency and alien frequencies carrier wave is set respectively.
In the step 201, indoor setting and outdoor with frequently carrier wave and with the carrier wave of outdoor alien frequencies, promptly by mode shown in Figure 1 in indoor deployment corresponding communication system, promptly cover not good indoor the setting with receiver/transmitter 10 and alien frequencies receiver/transmitter 11 frequently at signal.It will be appreciated by those skilled in the art that to be provided with receiver/transmitter 10 frequently are prior aries with alien frequencies receiver/transmitter 11 indoor, its realization is easier.
In the step 201 of the present invention, channel quality thresholds with frequency and alien frequencies carrier wave need be set in the base station, promptly at indoor user terminal when carrying out the service access request, need according to user terminal current how with the channel quality on the carrier wave frequently or the channel quality on the alien frequencies carrier wave, specifically will carry out the selection that carrier wave inserts according to the channel quality of corresponding carriers, thereby make indoor user terminal access communications network, realize the corresponding communication business.
According to the specific implementation needs of technical solution of the present invention, also can be provided with in the step 201 and stride assignment thresholding P frequently, below specifically illustrate its implication.Suppose that A0 represents the excited user number of f0 carrier frequency (with outdoor carrier wave with frequency), A1 represents the excited user number of f1 carrier frequency (with the carrier wave of outdoor alien frequencies).Stride the thresholding of assignment frequently P, implication is for comparing the excited user number of carrier frequency f0 and f1, if exceeding, the difference between the excited user number of carrier frequency f0 and f1 strides the thresholding of assignment frequently, the excited user number that excited user number on the carrier frequency f0 and carrier frequency f1 then be described distributes unbalanced, the user terminal that the back is inserted need be linked on the carrier frequency f1 as much as possible.In this example, each carrier frequency stride that frequently the assignment thresholding is identical.
In this example, at least one in channel quality and the following parameter is relevant: the signal to noise ratio of channel (SINR, Signal to Noise Ratio), the received power of receiving terminal channel, the error rate of channel etc.
Step 202: after receiving the service request of user terminal, obtaining with frequently or the channel quality of alien frequencies carrier wave, compare with the channel quality thresholds of carrier wave, is the carrier wave that user terminal is determined service access according to comparative result.
The base station is the carrier wave that user terminal is determined service access, comprising:
Will be with the channel quality of carrier wave and the channel quality thresholds of being somebody's turn to do with the frequency carrier wave compare frequently, if greater than channel quality thresholds, then further determine whether transship with the frequency carrier wave, indicating user terminal inserts the alien frequencies carrier wave if transship then, not transshipping then, indicating user terminal inserts with the frequency carrier wave;
If the channel quality with the frequency carrier wave is less than or equal to channel quality thresholds, determine then whether the alien frequencies carrier wave transships, indicating user terminal inserts the high carrier wave of fairness if transship then; If nonoverload, whether the channel quality of then judging the alien frequencies carrier wave greater than the channel quality thresholds of this alien frequencies carrier wave, if insert the alien frequencies carrier wave greater than indicating user terminal then, otherwise indicating user terminal inserts with carrier wave frequently.
The base station is the carrier wave that user terminal is determined service access, comprising:
The channel quality of alien frequencies carrier wave and the channel quality thresholds of this alien frequencies carrier wave are compared, if be less than or equal to channel quality thresholds, then indicating user terminal inserts the high carrier wave of fairness;
If greater than channel quality thresholds, further determine whether transship with the frequency carrier wave, indicating user terminal inserts the alien frequencies carrier wave if transship then; If nonoverload, whether then further judge with the channel quality of carrier wave frequently greater than this with the channel quality thresholds of carrier wave frequently, if insert with carrier wave frequently greater than indicating user terminal then, if be less than or equal to channel quality thresholds with the frequency carrier wave, judge further then whether the alien frequencies carrier wave transships, indicating user terminal inserts the high carrier wave of fairness if transship then; If nonoverload, then indicating user terminal inserts the alien frequencies carrier wave.
The difference that above-mentioned overload promptly is expressed as the excited user number of two carrier frequency has surpassed strides the thresholding of assignment frequently P, illustrates that load is seriously unbalanced.
Below, further illustrate the essence of technical solution of the present invention by concrete example.
Supposing that indoor user terminal is current resides on the carrier wave f0, and the base station root should obtain the channel SINR of f0 according to RU (Route Update) message of indoor user terminal to report.The channel quality thresholds of supposing setting of the present invention is the dependent thresholds of SINR, is assumed to be 10dB, and when SINR＞10dB, the f0 signal is better, perhaps SINR≤10dB, f0 dtr signal.
The base station is according to the value of the channel SINR of the f0 of user terminal to send up, and compare with the f0 channel quality thresholds of setting, if SINR＞10dB, the signal that f0 then is described is better, does not have pilot pollution, is likely in the good zone of indoor covering, be preferentially to insert f0 for the carrier wave access strategy of user terminal selecting this moment, but when inserting f0, need also to consider whether f0 transships, just whether the difference of the excited user number A1 of the excited user number A0 of f0 and f1 is greater than striding the thresholding of assignment frequently P.If greater than, illustrate that then load is seriously unbalanced, need current access service is shunted the part to f1, so the base station indicating user terminal inserts f1.
Do not stride the thresholding of assignment frequently if surpass, illustrate that then load is balanced, this moment, the base station indicating user terminal inserted f0.
When the SINR of f0≤10dB is determined in the base station, the poor signal of f0 is described, have two kinds of situations, first kind of situation be f0 in the critical zone, be subjected to the pilot pollution of outdoor signal, and it is relatively more serious, caused SINR undesirable, but this moment, the f1 signal was necessarily fine, because f1 is the alien frequencies signal, can not be subjected to pilot pollution, so if can preferentially insert f1 in the critical zone from outdoor cell.Also having a kind of may be in the indoor cell depths, cover relatively poor place, at this time f1 alien frequencies signal is owing to be the same with f0, because be same coverage cell, so the signal strength signal intensity of f1 can be not very good yet, can utilize pilot tone to insert the judgement formula and select carrier frequency according to loading condition and the RST of f1 as for specifically connecing that.
Judge whether f1 transships, concrete, promptly judge difference between the current excited user number of excited user number that f1 is current and f0 whether greater than striding the thresholding of assignment frequently P, if greater than overload then, otherwise nonoverload.It will be appreciated by those skilled in the art that the base station is to realize easily by the access user on indoor f0 and the f1 being carried out quantity statistics.
If the f1 overload, and the f0 signal quality is bad, can insert by carrier frequency and select formula this moment | and R0-R1|/result of calculation (R0+R1) is selected the carrier frequency of user terminal access.Wherein, R0 represents the average user speed of f0, the speed that is current whole business is divided by number of users, wherein, calculating f0 | during the value of R0-R1|/(R0+R1), the number of users of the R0 that calculates comprises current business requesting users terminal, promptly suppose the user terminal access f0 of this current service request, therefore, the last number of users of f0 adds one on current existing number of users; R1 represents the average user speed of f1, and employed number of users is that current f1 goes up existing number of users when calculating R1.Calculating f1 | during the value of R0-R1|/(R0+R1), when calculating R1 employed number of users comprise current business requesting users terminal, the user terminal of promptly supposing this current service request inserts f1, and therefore, the last number of users of f1 adds one on current existing number of users; Employed number of users is that current f0 goes up existing number of users when calculating R0.Among the present invention, why indicating user terminal inserts | R0-R1|/(R0+R1) the less carrier wave of result of calculation, be based on mainly that carrier wave is harmonious to be considered, i.e. and the less carrier wave of indicating user terminal access service is to guarantee the fairness of carriers carry business.When calculate according to above-mentioned formula come to the same thing the time, indicating user terminal inserts current resident carrier wave, perhaps indicating user terminal inserts in any carrier wave.
Among the present invention, determine that the mode of above-mentioned R0, R1 is as follows:
Determine SINR and DRC speed according to the parameter shown in table 1 and the table 2, concrete, table 1 is the SINR and the DRC speed mapping table of carrier wave; Table 2 is known DRC speed and physical layer rate mapping table.
Table 1
| ??DRC?Rate??(kbps) | ?DRC?Index | ??Slot | Physical layer forward direction speed (kbps) |
| ??38.4 | ??1 | ??16 | ??230 |
| ??76.8 | ??2 | ??8 | ??390 |
| ??153.6 | ??3 | ??4 | ??490 |
| ??307.2 | ??4 | ??2 | ??590 |
| ??307.2 | ??5 | ??4 | ??910 |
| ??614.4 | ??6 | ??1 | ??614.4 |
| ??614.4 | ??7 | ??2 | ??1090 |
| ??DRC?Rate??(kbps) | ?DRC?Index | ??Slot | Physical layer forward direction speed (kbps) |
| ??921.6 | ??8 | ??2 | ??1500 |
| ??1228.8 | ??9 | ??1 | ??1228.8 |
| ??1228.8 | ??10 | ??2 | ??1880 |
| ??1536 | ??13 | ??2 | ??2150 |
| ??1843 | ??11 | ??1 | ??1843 |
| ??2457 | ??12 | ??1 | ??2457 |
| ??3072 | ??14 | ??1 | ??3072 |
Table 2
Suppose that user terminal has inserted certain carrier wave, tabling look-up draws cell physical layer speed according to the signal strength signal intensity of this carrier wave (being SINR in this example), then divided by the community user number, the speed R0 of this carrier frequency after obtaining terminal and inserting, table look-up equally simultaneously, (current number of users adds one divided by the number of users on this carrier wave again, suppose that promptly this terminal inserts under the situation of this carrier wave), (terminal does not insert another sub-district to calculate the user rate R1 of another sub-district, so number of users is exactly original number of users), utilize the above-mentioned formula of formula then | R0-R1|/(R0+R1) calculating gets final product.
If the f1 nonoverload illustrates f0, f1 load balancing, may be indoor or critical zone, so this moment, the base station issued the RUrequest signaling, search alien frequencies f1 by the signal strength signal intensity of user terminal to send up f1, makes inserting according to the signal strength signal intensity of f1 then and selects.
Concrete, if SINR＞10dB of f1 illustrates that the f1 signal is better, the f0 dtr signal, user terminal is in the critical zone, and f0 has been subjected to the pilot pollution of outdoor cell, and this moment, the base station indicating user terminal inserted f1.
If SINR≤10dB of f1, illustrate that f1 is the same with f0, signal is all relatively poor, certainly be the zone that covers difference at indoor cell somewhere wireless signal, the access strategy of this moment is insert to select formula according to carrier wave | R0-R1|/(R0+R1) selects carrier frequency, concrete selection mode is described referring to preamble, repeats no more here.
Supposing that indoor user terminal is current resides on the carrier wave f1, and the base station has obtained the SINR of f1 according to the RU message of user terminal to send up.Suppose that still channel quality thresholds adopts SINR to determine, and be set to 10dB.If SINR＞10dB of f1 illustrates that the f1 signal is better, SINR≤10dB illustrates the f1 dtr signal.
If SINR≤10dB of f1, the dtr signal of f1 then is described, the signal of f1 covers bad, that has only a kind of possibility, it is exactly the blind area that user terminal is in the indoor area of coverage, the bad place of just indoor covering, at this time the signal of f0 is also relatively poor certainly, so at this time select formula according to aforesaid carrier wave | R0-R1|/(R0+R1) determine which carrier wave is active user's terminal should insert.
If SINR＞10dB of f1 illustrates that then the signal of f1 is relatively good, have two kinds of situations, first kind be f1 in the critical zone, be not subjected to the pilot pollution of outdoor signal, signal is pure.Also having a kind of may be to cover locally preferably in indoor cell, and the f0 signal equally also should be better here, do not have pilot pollution, so at these two kinds of different situations, overload situations and signal strength signal intensity that can basis be selected carrier frequency.At first make as judging according to the overload situations of f0: the f0 overload, preferentially insert f1.
And during the f0 nonoverload, f0, f1 load balancing are described, and user terminal is in indoor or the critical zone, and this moment, the base station issued the RUrequest signaling, and search alien frequencies f0 by the signal strength signal intensity of user terminal to send up f0, makes inserting according to the intensity of f0 then and selects.If SINR＞10dB of f0 illustrates that the f0 signal is better, be in indoor covering good area, at this moment preferentially insert f0.And if SINR≤10dB of f0 illustrates that user terminal is in the critical zone, f0 has been subjected to the Pilot Interference of external cell, and the f1 signal is pure, so can select carrier frequency according to the overload situations of f1.If f1 is overload not, so preferentially insert f1, if the f1 overload can be selected formula according to carrier wave | R0-R1|/(R0+R1) determines the carrier wave that user terminal should insert.
It will be appreciated by those skilled in the art that among the present invention the received power of receiving terminal channel, the error rate of channel etc. and also can realize technical scheme of the present invention equally as the parameter of weighing channel quality.It will be appreciated by those skilled in the art that it is to realize easily that the base station obtains or calculate above-mentioned channel quality parameter.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (13)
1. an indoor access method is characterized in that, indoor setting and outdoor with frequently carrier wave and with the carrier wave of outdoor alien frequencies; Channel quality thresholds with frequency and alien frequencies carrier wave is set respectively; Described method also comprises:
After receiving the service request of user terminal, obtaining with frequently or the channel quality of alien frequencies carrier wave, compare with the channel quality thresholds of carrier wave, is the carrier wave that user terminal is determined service access according to comparative result.
2. cut-in method according to claim 1 is characterized in that, described and channel quality thresholds carrier wave compares, and is the carrier wave that user terminal is determined service access according to comparative result, comprising:
Will be with the channel quality of carrier wave and the channel quality thresholds of being somebody's turn to do with the frequency carrier wave compare frequently, if greater than channel quality thresholds, then further determine whether transship with the frequency carrier wave, indicating user terminal inserts the alien frequencies carrier wave if transship then, not transshipping then, indicating user terminal inserts with the frequency carrier wave;
If the channel quality with the frequency carrier wave is less than or equal to channel quality thresholds, determine then whether the alien frequencies carrier wave transships, indicating user terminal inserts the high carrier wave of fairness if transship then; If nonoverload, whether the channel quality of then judging the alien frequencies carrier wave greater than the channel quality thresholds of this alien frequencies carrier wave, if insert the alien frequencies carrier wave greater than indicating user terminal then, otherwise indicating user terminal inserts with carrier wave frequently.
3. cut-in method according to claim 1 is characterized in that, described and channel quality thresholds carrier wave compares, and is the carrier wave that user terminal is determined service access according to comparative result, comprising:
The channel quality of alien frequencies carrier wave and the channel quality thresholds of this alien frequencies carrier wave are compared, if be less than or equal to channel quality thresholds, then indicating user terminal inserts the high carrier wave of fairness;
If greater than channel quality thresholds, further determine whether transship with the frequency carrier wave, indicating user terminal inserts the alien frequencies carrier wave if transship then; If nonoverload, whether then further judge with the channel quality of carrier wave frequently greater than this with the channel quality thresholds of carrier wave frequently, if insert with carrier wave frequently greater than indicating user terminal then, if be less than or equal to channel quality thresholds with the frequency carrier wave, judge further then whether the alien frequencies carrier wave transships, indicating user terminal inserts the high carrier wave of fairness if transship then; If nonoverload, then indicating user terminal inserts the alien frequencies carrier wave.
4. according to claim 2 or 3 described cut-in methods, it is characterized in that described overload is that the difference between the excited user number of the excited user number of carrier wave and alien frequencies carrier wave has exceeded user's number of threshold values of setting frequently together.
5. cut-in method according to claim 4 is characterized in that, described indicating user terminal inserts the high carrier wave of fairness, is specially the carrier wave that the carrier wave that following formula result of calculation is less inserts as user terminal:
| R0-R1|/(R0+R1), wherein, R0 represents that R1 represents the average user speed of alien frequencies f1 with the Mean Speed of frequency carrier wave f0; Calculating f0 | during the value of R0-R1|/(R0+R1), the number of users that calculates R0 is to add one on the current number of users that has inserted; Calculating f1 | during the value of R0-R1|/(R0+R1), the number of users that calculates R1 is to add one on the current number of users that has inserted.
6. cut-in method according to claim 5 is characterized in that, at least one in described channel quality and the following parameter is relevant: the received power of the signal to noise ratio of channel, receiving terminal channel, the error rate of channel.
7. a communication system is characterized in that, comprises with frequency receiver/transmitter and alien frequencies receiver/transmitter, and is described with receiver/transmitter and described alien frequencies receiver/transmitter are connected with the base station frequently; Wherein, the described receiver/transmitter of frequency together is used to send and reception and the identical carrier wave of outdoor communication system carrier frequency, and described alien frequencies receiver/transmitter is used to send and reception and the different carrier wave of outdoor communication system carrier frequency.
8. communication system according to claim 7, it is characterized in that, after described base station receives the service request of user terminal, obtain channel quality with frequency or alien frequencies carrier wave, comparing with the channel quality thresholds of setting, is the carrier wave that user terminal is determined service access according to comparative result.
9. communication system according to claim 8 is characterized in that, described base station is the carrier wave that user terminal is determined service access, comprising:
Will be with the channel quality of carrier wave and the channel quality thresholds of being somebody's turn to do with the frequency carrier wave compare frequently, if greater than channel quality thresholds, then further determine whether transship with the frequency carrier wave, indicating user terminal inserts the alien frequencies carrier wave if transship then, not transshipping then, indicating user terminal inserts with the frequency carrier wave;
If the channel quality with the frequency carrier wave is less than or equal to channel quality thresholds, determine then whether the alien frequencies carrier wave transships, indicating user terminal inserts the high carrier wave of fairness if transship then; If nonoverload, whether the channel quality of then judging the alien frequencies carrier wave greater than the channel quality thresholds of this alien frequencies carrier wave, if insert the alien frequencies carrier wave greater than indicating user terminal then, otherwise indicating user terminal inserts with carrier wave frequently.
10. communication system according to claim 8 is characterized in that, described base station is the carrier wave that user terminal is determined service access, comprising:
The channel quality of alien frequencies carrier wave and the channel quality thresholds of this alien frequencies carrier wave are compared, if be less than or equal to channel quality thresholds, then indicating user terminal inserts the high carrier wave of fairness;
If greater than channel quality thresholds, further determine whether transship with the frequency carrier wave, indicating user terminal inserts the alien frequencies carrier wave if transship then; If nonoverload, whether then further judge with the channel quality of carrier wave frequently greater than this with the channel quality thresholds of carrier wave frequently, if insert with carrier wave frequently greater than indicating user terminal then, if be less than or equal to channel quality thresholds with the frequency carrier wave, judge further then whether the alien frequencies carrier wave transships, indicating user terminal inserts the high carrier wave of fairness if transship then; If nonoverload, then indicating user terminal inserts the alien frequencies carrier wave.
11., it is characterized in that described overload is that the difference between the excited user number of the excited user number of carrier wave and alien frequencies carrier wave has exceeded user's number of threshold values of setting frequently together according to claim 9 or 10 described communication systems.
12. communication system according to claim 11 is characterized in that, described indicating user terminal inserts the high carrier wave of fairness, the carrier wave that specifically that following formula result of calculation is less carrier wave inserts as user terminal:
| R0-R1|/(R0+R1), wherein, R0 represents that R1 represents the average user speed of alien frequencies f1 with the Mean Speed of frequency carrier wave f0; Calculating f0 | during the value of R0-R1|/(R0+R1), the number of users that calculates R0 is to add one on the current number of users that has inserted; Calculating f1 | during the value of R0-R1|/(R0+R1), the number of users that calculates R1 is to add one on the current number of users that has inserted.
13. communication system according to claim 12 is characterized in that, at least one in described channel quality and the following parameter is relevant: the received power of the signal to noise ratio of channel, receiving terminal channel, the error rate of channel.
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