CN101801032B - Indoor access method and communication system - Google Patents
Indoor access method and communication system Download PDFInfo
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- CN101801032B CN101801032B CN200910217521.1A CN200910217521A CN101801032B CN 101801032 B CN101801032 B CN 101801032B CN 200910217521 A CN200910217521 A CN 200910217521A CN 101801032 B CN101801032 B CN 101801032B
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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 carrier wave access technology that the present invention relates to user terminal, relates 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 designing for controlling in high speed wireless 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 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, for operator brings fair margin of profit, increase.
The use occasion of indoor covering mainly comprises indoor blind area, the frequent indoor place of switching of the large-scale indoor place that telephone traffic is high and generation.Utilization is distributed in the antenna of indoor diverse location, and signal is evenly distributed on to room area, thereby guarantees the indoor desirable covering that has.Sufficient traffic access amount is provided simultaneously, improves local connection quality comprehensively, improve call completing rate, for user offers high-quality service.
In the present invention, by community, carrier frequency place, be that CELL0, working frequency points are that the work carrier wave (being also working frequency points) of f0 is expressed as CELL0-f0, acquiescence outdoor cell is CELL0, and indoor cell is CELL1, if indoor, there are a plurality of communities, are followed successively by CELL2, CELL3.......In the present invention, critical zone means closely adjacent place of indoor and outdoor, such as the window of floor, and the regions such as hall of low layer floor.
For above-mentioned indoor radio signal, cover poor defect, having a solution is in indoor deployment and outdoor with carrier wave frequently, the working frequency points of supposing outdoor deployment is CELL0-f0, and critical zone, indoor two regions are all disposed with f0 frequency frequently, be all CELL1-f0, community is different, but frequency is identical.Such benefit is not change frequently direct-cut operation, only has with soft handover frequently, and coverage rate that can the indoor most of region of basic guarantee.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 critical zone outdoor signal is stronger, indoor signal also not a little less than, between homogenous frequency signal, also interfere with each other like this, form more intense Pilot Interference, cause poor signal quality; The occasions such as common office, a lot of emphasis overlay area is all near window, namely the serious region of pilot pollution.So indoor and outdoor is with frequently covering and be not suitable for emphasis overlay area at the skyscraper of critical zone.
Also having a solution is at indoor deployment alien frequencies carrier wave.Suppose that outdoor signal working frequency points is CELL0-f0, and what in critical zone and indoor two regions, dispose is CELL1-f1 frequency, carrier wave and outdoor different, has guaranteed that critical zone can, from the access of alien frequencies frequency, guarantee the minimizing of pilot pollution situation like this.But also there is following shortcoming in this carrier wave deployment way: because some building telephone traffic is larger, so only have 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 indoor communications performance.
For achieving the above object, technical scheme of the present invention is achieved in that
An indoor access method, indoor setting and outdoor carrier wave with frequently 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:
Receiving after the service request of user terminal, obtain the channel quality with frequency and/or 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 according to comparative result, is the carrier wave that user terminal is determined service access, comprising:
Channel quality with frequency carrier wave and this channel quality thresholds with frequency carrier wave are compared, if be greater than channel quality thresholds, further determine whether same carrier wave frequently transships, if transship indicating user terminal access alien frequencies carrier wave, do not transship indicating user terminal access with frequency carrier wave;
If the channel quality with frequency carrier wave is less than or equal to channel quality thresholds, determine whether alien frequencies carrier wave transships, if transship the high carrier wave of indicating user terminal access fairness; If nonoverload, judges whether the channel quality of alien frequencies carrier wave is greater than the channel quality thresholds of this alien frequencies carrier wave, if be greater than indicating user terminal access alien frequencies carrier wave, otherwise indicating user terminal access is with frequency carrier wave.
Preferably, described and channel quality thresholds carrier wave compares, and according to comparative result, is the carrier wave that user terminal is determined service access, comprising:
The channel quality thresholds of the channel quality of alien frequencies carrier wave and this alien frequencies carrier wave is compared, if be less than or equal to channel quality thresholds, indicating user terminal accesses the high carrier wave of fairness;
If be greater than channel quality thresholds, further determine with frequency carrier wave and whether transship, if transship indicating user terminal access alien frequencies carrier wave; If nonoverload, further whether the same channel quality of carrier wave frequently of judgement is greater than this same channel quality thresholds of carrier wave frequently, if be greater than indicating user terminal access with frequency carrier wave, if be less than or equal to the channel quality thresholds with frequency carrier wave, further judge whether alien frequencies carrier wave transships, if transship the high carrier wave of indicating user terminal access fairness; If nonoverload, indicating user terminal access alien frequencies carrier wave.
Preferably, described overload is to have exceeded with the difference between the frequency excited user number of carrier wave and the excited user number of alien frequencies carrier wave user's number of threshold values of setting.
Preferably, the high carrier wave of described indicating user terminal access fairness, is specially, the carrier wave that the less carrier wave of following formula result of calculation is accessed 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 having accessed; 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 having accessed.
Preferably, described channel quality is relevant at least one item in following parameter: the signal to noise ratio of channel, the received power of receiving terminal channel, the error rate of channel.
A communication system, comprises with frequency receiver/transmitter and alien frequencies receiver/transmitter, described with receiver/transmitter and described alien frequencies receiver/transmitter are connected with base station frequently; Wherein, described with receiver/transmitter frequently for the sending and receiving carrier wave identical with outdoor communication system carrier frequency, described alien frequencies receiver/transmitter is used for sending and receiving and the different carrier wave of outdoor communication system carrier frequency.
Preferably, described base station receives after the service request of user terminal, obtains the channel quality with frequency and/or alien frequencies carrier wave, compare with the channel quality thresholds of setting, and according to comparative result, be the carrier wave that user terminal is determined service access.
Preferably, described base station is the carrier wave that user terminal is determined service access, comprising:
Channel quality with frequency carrier wave and this channel quality thresholds with frequency carrier wave are compared, if be greater than channel quality thresholds, further determine whether same carrier wave frequently transships, if transship indicating user terminal access alien frequencies carrier wave, do not transship indicating user terminal access with frequency carrier wave;
If the channel quality with frequency carrier wave is less than or equal to channel quality thresholds, determine whether alien frequencies carrier wave transships, if transship the high carrier wave of indicating user terminal access fairness; If nonoverload, judges whether the channel quality of alien frequencies carrier wave is greater than the channel quality thresholds of this alien frequencies carrier wave, if be greater than indicating user terminal access alien frequencies carrier wave, otherwise indicating user terminal access is with frequency carrier wave.
Preferably, described base station is the carrier wave that user terminal is determined service access, comprising:
The channel quality thresholds of the channel quality of alien frequencies carrier wave and this alien frequencies carrier wave is compared, if be less than or equal to channel quality thresholds, indicating user terminal accesses the high carrier wave of fairness;
If be greater than channel quality thresholds, further determine with frequency carrier wave and whether transship, if transship indicating user terminal access alien frequencies carrier wave; If nonoverload, further whether the same channel quality of carrier wave frequently of judgement is greater than this same channel quality thresholds of carrier wave frequently, if be greater than indicating user terminal access with frequency carrier wave, if be less than or equal to the channel quality thresholds with frequency carrier wave, further judge whether alien frequencies carrier wave transships, if transship the high carrier wave of indicating user terminal access fairness; If nonoverload, indicating user terminal access alien frequencies carrier wave.
Preferably, described overload is to have exceeded with the difference between the frequency excited user number of carrier wave and the excited user number of alien frequencies carrier wave user's number of threshold values of setting.
Preferably, the high carrier wave of described indicating user terminal access fairness, the carrier wave specifically less carrier wave of following formula result of calculation being accessed 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 having accessed; 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 having accessed.
Preferably, described channel quality is relevant at least one item in following parameter: the signal to noise ratio of channel, the received power of receiving terminal channel, the error rate of channel.
In the present invention, by at indoor setting and outdoor carrier wave with frequently and the carrier wave of alien frequencies, when indoor user terminal carries out service access, according to the residing position of user terminal, for it, select corresponding access carrier, 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 effectively balanced 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.
Accompanying drawing explanation
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 carrier wave with frequently and the carrier wave of alien frequencies, when indoor user terminal carries out service access, according to the residing position of user terminal, for it, select corresponding access carrier, 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 effectively balanced 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, described with receiver/transmitter 10 and described alien frequencies receiver/transmitter 11 are connected with base station 12 frequently; Wherein, described with receiver/transmitter 10 frequently for the sending and receiving carrier wave identical with outdoor communication system carrier frequency, described alien frequencies receiver/transmitter 11 is for sending and receiving 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 dry station or the relay stations put being connected with base station frequently, merit is divided amplifier, and corresponding antenna is realized.By dry, put station or relay station is positioned near building, divide amplifier to be arranged at signal a plurality of merits and cover in not good room, and dual-mode antenna divides amplifier to be connected with each merit, wherein, merit divides amplifier for receiving and transmitting signal is amplified, to reach the intensity identical with outdoor cover signal.
Below in conjunction with the communication system in Fig. 1, describe the present invention in detail and how to realize the indoor access of business, 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 carrier wave with frequently and with the carrier wave of outdoor alien frequencies; Channel quality thresholds with frequency and alien frequencies carrier wave is set respectively.
In step 201, indoor setting and outdoor carrier wave with frequently and with the carrier wave of outdoor alien frequencies, the mode shown in Fig. 1 of press is in the corresponding communication system of indoor deployment, at signal, covers not good indoor setting with receiver/transmitter 10 and alien frequencies receiver/transmitter 11 frequently.It will be appreciated by those skilled in the art that to arrange with receiver/transmitter 10 are frequently prior aries with alien frequencies receiver/transmitter 11 indoor, its realization is easier.
In step 201 of the present invention, in base station, need to arrange the channel quality thresholds with frequency and alien frequencies carrier wave, at indoor user terminal when carrying out service access request, need be current at the channel quality with on carrier wave frequently and/or the channel quality on alien frequencies carrier wave how according to user terminal, specifically the selection of carrier wave access will be carried out according to the channel quality of corresponding carriers, thereby make indoor user terminal access communications network, realize corresponding communication service.
According to the specific implementation needs of technical solution of the present invention, in step 201, also can be provided with across frequency assignment thresholding P, below specifically illustrate its implication.Suppose that A0 represents the excited user number of f0 carrier frequency (with the outdoor carrier wave with frequency), A1 represents the excited user number of f1 carrier frequency (with the carrier wave of outdoor alien frequencies).Across frequency assignment thresholding P, implication is for comparing the excited user number of carrier frequency f0 and f1, if the difference between carrier frequency f0 and the excited user number of f1 exceeds across frequency assignment thresholding, the excited user number that excited user number on carrier frequency f0 and carrier frequency f1 be described distributes unbalanced, the user terminal of rear access need to be linked on carrier frequency f1 as much as possible.In this example, each carrier frequency identical across frequency assignment thresholding.
In this example, channel quality is relevant at least one item in following parameter: the signal to noise ratio of channel (SINR, Signal to Noise Ratio), the received power of receiving terminal channel are, the error rate of channel etc.
Step 202: receiving after the service request of user terminal, obtain the channel quality with frequency and/or 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.
Base station is the carrier wave that user terminal is determined service access, comprising:
Channel quality with frequency carrier wave and this channel quality thresholds with frequency carrier wave are compared, if be greater than channel quality thresholds, further determine whether same carrier wave frequently transships, if transship indicating user terminal access alien frequencies carrier wave, do not transship indicating user terminal access with frequency carrier wave;
If the channel quality with frequency carrier wave is less than or equal to channel quality thresholds, determine whether alien frequencies carrier wave transships, if transship the high carrier wave of indicating user terminal access fairness; If nonoverload, judges whether the channel quality of alien frequencies carrier wave is greater than the channel quality thresholds of this alien frequencies carrier wave, if be greater than indicating user terminal access alien frequencies carrier wave, otherwise indicating user terminal access is with frequency carrier wave.
Base station is the carrier wave that user terminal is determined service access, comprising:
The channel quality thresholds of the channel quality of alien frequencies carrier wave and this alien frequencies carrier wave is compared, if be less than or equal to channel quality thresholds, indicating user terminal accesses the high carrier wave of fairness;
If be greater than channel quality thresholds, further determine with frequency carrier wave and whether transship, if transship indicating user terminal access alien frequencies carrier wave; If nonoverload, further whether the same channel quality of carrier wave frequently of judgement is greater than this same channel quality thresholds of carrier wave frequently, if be greater than indicating user terminal access with frequency carrier wave, if be less than or equal to the channel quality thresholds with frequency carrier wave, further judge whether alien frequencies carrier wave transships, if transship the high carrier wave of indicating user terminal access fairness; If nonoverload, indicating user terminal access alien frequencies carrier wave.
The difference that above-mentioned overload is expressed as the excited user number of two carrier frequency has surpassed across frequency assignment thresholding P, illustrates that load is seriously unbalanced.
Below, by concrete example, further illustrate the essence of technical solution of the present invention.
Suppose that the current carrier wave f0 that resides at of indoor user terminal is upper, this RU according to indoor user terminal to report of base station root (Route Update) message, has obtained the channel SINR of f0.The dependent thresholds that the channel quality thresholds of supposing setting of the present invention is SINR, is assumed to be 10dB, and when SINR > 10dB, f0 signal is better, or SINR≤10dB, f0 dtr signal.
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 > is 10dB, the signal that f0 is described is better, there is not pilot pollution, be likely in the good region of indoor covering, now for the carrier wave access strategy of user terminal selecting be priority access f0, but when access f0, also need to consider whether f0 transships, namely whether the difference of the excited user number A0 of f0 and the excited user number A1 of f1 is greater than across frequency assignment thresholding P.If be greater than, illustrate that load is seriously unbalanced, current access service need to be shunted to a part to f1, so base station indicating user terminal access f1.
If do not surpass across frequency assignment thresholding, illustrate that load is more balanced, now base station indicating user terminal access f0.
When SINR≤10dB of f0 is determined in base station, the poor signal of f0 is described, may have two kinds of situations, the first situation be f0 in critical zone, be subject to the pilot pollution of outdoor signal, and more serious, caused SINR undesirable, but now f1 signal is necessarily fine, because f1 is alien frequencies signal, can not be subject to the pilot pollution from outdoor cell, so if can priority access f1 in critical zone.Also having a kind of may be in depths, indoor cell, cover poor place, at this time f1 alien frequencies signal is owing to being the same with f0, because be same coverage cell, so the signal strength signal intensity of f1 can be not very good yet, as for specifically connecing that, can, according to the loading condition of f1 and RST, utilize pilot tone access judgement formula to select carrier frequency.
Judge whether f1 transships, concrete, judge whether the difference between the current excited user number of excited user number that f1 is current and f0 is greater than across frequency assignment thresholding P, if be greater than overload, otherwise nonoverload.It will be appreciated by those skilled in the art that it is easily to realize that quantity statistics is carried out by the access user on indoor f0 and f1 in base station.
If f1 overload, and f0 signal quality is bad, now can be accessed and be selected formula by carrier frequency | 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, be that the speed of 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 the user terminal of current business request, suppose that the user terminal of this current service request accesses f0, therefore, the upper number of users of f0 adds one on current existing number of users; R1 represents the average user speed of f1, and the number of users using while calculating R1 is the upper existing number of users of current f1.Calculating f1 | during the value of R0-R1|/(R0+R1), the number of users that uses while calculating R1 comprise the user terminal of current business request, the user terminal access f1 that supposes this current service request, therefore, the upper number of users of f1 adds one on current existing number of users; The number of users using while calculating R0 is the upper existing number of users of current f0.In the present invention, why indicating user terminal access | the less carrier wave of result of calculation of R0-R1|/(R0+R1), mainly based on carrier wave is harmonious, to consider, i.e. the less carrier wave of indicating user terminal access service, to guarantee the fairness of carriers carry business.When according to above-mentioned formula, calculate come to the same thing time, the current resident carrier wave of indicating user terminal access, or indicating user terminal accesses in any carrier wave.
In the present invention, determine that the mode of above-mentioned R0, R1 is as follows:
According to the parameter shown in table 1 and table 2, determine SINR and DRC speed, concrete, table 1 is 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 |
| 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 accessed certain carrier wave, according to the signal strength signal intensity of this carrier wave (being SINR in this example), tabling look-up draws cell physical layer speed, then divided by community user number, can obtain the speed R0 of this carrier frequency after the access of terminal, table look-up equally simultaneously, divided by the number of users on this carrier wave, (current number of users adds one again, suppose that this terminal accesses in the situation of this carrier wave), (terminal does not access another community to calculate the user rate R1 of another community, so number of users is exactly original number of users), then utilize the above-mentioned formula of formula | R0-R1|/(R0+R1) calculate.
If f1 nonoverload, illustrates f0, f1 load balancing, may be indoor or critical zone, so now base station issues RUrequest signaling, search alien frequencies f1, by the signal strength signal intensity of user terminal to send up f1, then makes access according to the signal strength signal intensity of f1 and selects.
Concrete, if the SINR > 10dB of f1 illustrates that f1 signal is better, f0 dtr signal, user terminal is in critical zone, and f0 has been subject to the pilot pollution of outdoor cell, now base station indicating user terminal access f1.
If SINR≤10dB of f1, illustrate that f1 is the same with f0, signal is all poor, certainly be to cover poor region at somewhere, indoor cell wireless signal, access strategy is now to select formula according to carrier wave access | R0-R1|/(R0+R1) selects carrier frequency, concrete selection mode, referring to described in above, repeats no more here.
Suppose that the current carrier wave f1 that resides at of indoor user terminal goes up, base station, according to the RU message of user terminal to send up, has obtained the SINR of f1.Still suppose that channel quality thresholds adopts SINR to determine, and be set to 10dB.If the SINR > 10dB of f1, illustrates that f1 signal is better, SINR≤10dB, illustrates f1 dtr signal.
If SINR≤10dB of f1, the dtr signal of f1 is described, the signal of f1 covers bad, that only has a kind of possibility, it is exactly the blind area that user terminal is in the indoor area of coverage, the bad place of indoor covering namely, at this time the signal of f0 is certainly also poor, 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 access.
If the SINR > 10dB of f1, illustrates that the signal of f1 is relatively good, may have two kinds of situations, the first be f1 in critical zone, be not subject to the pilot pollution of outdoor signal, signal is pure.Also having a kind of may be in indoor cell, to cover locally preferably, and f0 signal equally also should be better here, there is no pilot pollution, so for these two kinds of different situations, overload situations and signal strength signal intensity that can basis be selected carrier frequency.First according to the overload situations of f0, make as judged: f0 overload, priority access f1.
And during f0 nonoverload, f0, f1 load balancing are described, and user terminal is in indoor or critical zone, and now base station issues RUrequest signaling, and search alien frequencies f0, by the signal strength signal intensity of user terminal to send up f0, then makes access according to the intensity of f0 and selects.If the SINR > 10dB of f0, illustrates that f0 signal is better, be at indoor covering good area, at this moment priority access f0.And if SINR≤10dB of f0 illustrates that user terminal is in critical zone, f0 has been subject to the Pilot Interference of external cell, and f1 signal is pure, so can select carrier frequency according to the overload situations of f1.If f1 is overload not, priority access f1 so, if f1 overload can be selected formula according to carrier wave | R0-R1|/(R0+R1) determines the carrier wave that user terminal should access.
It will be appreciated by those skilled in the art that in the present invention using the error rate of the received power of receiving terminal channel, channel etc. as the parameter of weighing channel quality, also can realize equally technical scheme of the present invention.It will be appreciated by those skilled in the art that it is easily to realize that base station obtains or calculate above-mentioned channel quality parameter.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.
Claims (10)
1. an indoor access method, is characterized in that, indoor setting and outdoor carrier wave with frequently 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:
Receiving after the service request of user terminal, obtain the channel quality with frequency and/or 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;
Described and channel quality thresholds carrier wave compares, and according to comparative result, is the carrier wave that user terminal is determined service access, comprising:
Channel quality with frequency carrier wave and this channel quality thresholds with frequency carrier wave are compared, if be greater than channel quality thresholds, further determine whether same carrier wave frequently transships, if transship indicating user terminal access alien frequencies carrier wave, do not transship indicating user terminal access with frequency carrier wave;
If the channel quality with frequency carrier wave is less than or equal to channel quality thresholds, determine whether alien frequencies carrier wave transships, if transship the high carrier wave of indicating user terminal access fairness; If nonoverload, judges whether the channel quality of alien frequencies carrier wave is greater than the channel quality thresholds of this alien frequencies carrier wave, if be greater than indicating user terminal access alien frequencies carrier wave, otherwise indicating user terminal access is with frequency carrier wave.
2. cut-in method according to claim 1, is characterized in that, described and channel quality thresholds carrier wave compares, and according to comparative result, is the carrier wave that user terminal is determined service access, comprising:
The channel quality thresholds of the channel quality of alien frequencies carrier wave and this alien frequencies carrier wave is compared, if be less than or equal to channel quality thresholds, indicating user terminal accesses the high carrier wave of fairness;
If be greater than channel quality thresholds, further determine with frequency carrier wave and whether transship, if transship indicating user terminal access alien frequencies carrier wave; If nonoverload, further whether the same channel quality of carrier wave frequently of judgement is greater than this same channel quality thresholds of carrier wave frequently, if be greater than indicating user terminal access with frequency carrier wave, if be less than or equal to the channel quality thresholds with frequency carrier wave, further judge whether alien frequencies carrier wave transships, if transship the high carrier wave of indicating user terminal access fairness; If nonoverload, indicating user terminal access alien frequencies carrier wave.
3. cut-in method according to claim 1 and 2, is characterized in that, described overload is to have exceeded with the difference between the frequency excited user number of carrier wave and the excited user number of alien frequencies carrier wave user's number of threshold values of setting.
4. cut-in method according to claim 3, is characterized in that, the high carrier wave of described indicating user terminal access fairness, is specially, the carrier wave that the less carrier wave of following formula result of calculation is accessed 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 having accessed; 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 having accessed.
5. cut-in method according to claim 4, is characterized in that, described channel quality is relevant at least one item in following parameter: the signal to noise ratio of channel, the received power of receiving terminal channel, the error rate of channel.
6. a communication system, is characterized in that, comprises with frequency receiver/transmitter and alien frequencies receiver/transmitter, described with receiver/transmitter and described alien frequencies receiver/transmitter are connected with base station frequently; Wherein, described with receiver/transmitter frequently for the sending and receiving carrier wave identical with outdoor communication system carrier frequency, described alien frequencies receiver/transmitter is used for sending and receiving and the different carrier wave of outdoor communication system carrier frequency;
Described base station receives after the service request of user terminal, obtains the channel quality with frequency and/or alien frequencies carrier wave, compare with the channel quality thresholds of setting, and according to comparative result, be the carrier wave that user terminal is determined service access;
Described base station is the carrier wave that user terminal is determined service access, comprising:
Channel quality with frequency carrier wave and this channel quality thresholds with frequency carrier wave are compared, if be greater than channel quality thresholds, further determine whether same carrier wave frequently transships, if transship indicating user terminal access alien frequencies carrier wave, do not transship indicating user terminal access with frequency carrier wave;
If the channel quality with frequency carrier wave is less than or equal to channel quality thresholds, determine whether alien frequencies carrier wave transships, if transship the high carrier wave of indicating user terminal access fairness; If nonoverload, judges whether the channel quality of alien frequencies carrier wave is greater than the channel quality thresholds of this alien frequencies carrier wave, if be greater than indicating user terminal access alien frequencies carrier wave, otherwise indicating user terminal access is with frequency carrier wave.
7. communication system according to claim 6, is characterized in that, described base station is the carrier wave that user terminal is determined service access, comprising:
The channel quality thresholds of the channel quality of alien frequencies carrier wave and this alien frequencies carrier wave is compared, if be less than or equal to channel quality thresholds, indicating user terminal accesses the high carrier wave of fairness;
If be greater than channel quality thresholds, further determine with frequency carrier wave and whether transship, if transship indicating user terminal access alien frequencies carrier wave; If nonoverload, further whether the same channel quality of carrier wave frequently of judgement is greater than this same channel quality thresholds of carrier wave frequently, if be greater than indicating user terminal access with frequency carrier wave, if be less than or equal to the channel quality thresholds with frequency carrier wave, further judge whether alien frequencies carrier wave transships, if transship the high carrier wave of indicating user terminal access fairness; If nonoverload, indicating user terminal access alien frequencies carrier wave.
8. communication system according to claim 7, is characterized in that, described overload is to have exceeded with the difference between the frequency excited user number of carrier wave and the excited user number of alien frequencies carrier wave user's number of threshold values of setting.
9. communication system according to claim 8, is characterized in that, the high carrier wave of described indicating user terminal access fairness, and the carrier wave specifically less carrier wave of following formula result of calculation being accessed 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 having accessed; 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 having accessed.
10. communication system according to claim 9, is characterized in that, described channel quality is relevant at least one item in following parameter: the signal to noise ratio of channel, the received power of receiving terminal channel, the error rate of channel.
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| CN102333319B (en) * | 2011-10-13 | 2017-07-21 | 南京中兴软件有限责任公司 | 1X strengthens the carrier frequency selecting method and device of business |
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