CN101107867A - Method for performing measurements for handoff of a mobile unit operating with a switched beam antenna - Google Patents
Method for performing measurements for handoff of a mobile unit operating with a switched beam antenna Download PDFInfo
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- CN101107867A CN101107867A CNA2005800040756A CN200580004075A CN101107867A CN 101107867 A CN101107867 A CN 101107867A CN A2005800040756 A CNA2005800040756 A CN A2005800040756A CN 200580004075 A CN200580004075 A CN 200580004075A CN 101107867 A CN101107867 A CN 101107867A
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Abstract
Measurements for handoff are made by a wireless transmit/receive unit (WTRU) operating with a switched beam antenna in a wireless communication system. The switched beam antenna is a smart antenna generating a plurality of directional beams and an omni-directional beam. The WTRU measures signals from a plurality of cells with the omni-directional beam and/or one or more of the directional beams. The WTRU evaluates and reports to the network measurement of the omni-directional beam or the strongest beam for adding cells to an active set of cells. For removing cells from an active set of cells, the WTRU evaluates and reports to the network measurements of the antenna beam selected for communication with the active set cells.
Description
Technical field
The present invention is about the category of radio communication, more particular words it, be about in a multi-cell wireless communication system with a switching of switching one of beam antenna running mobile wireless transmission unit (WTRU).
Background technology
In a wireless multi-cell communication systems, one moves WTRU moves to another sub-district from a sub-district usually.When this WTRU crosses the border of a sub-district, a switch over operation launches at this point.Switch over operation is a kind of program that makes the interior communication of an efficient cell interruptedly not transfer to another sub-district.During soft handoff, identical data are received between WTRU and two sub-districts and transmit.
Term " efficient set (active set) " means the set of getting in touch with the sub-district of (that is transmission and reception data) with WTRU.One or more sub-district is in the efficient cell set.
For supporting soft handoff, the signal execution physical measurement that WTRU uses the sub-district from this efficient set and receives from adjacent cell.These measurements are reported to a network or network controller with the occuring as the basis of one or more trigger event.Demand on wireless communication system is decided, and can operate the threshold values of setting up more than for measurement report.
For instance, in CDMA 2000 type (CDMA2000) system, a WTRU measures the intensity that is reached the pilot signal (pilot signals) that is sent by adjacent cell by the sub-district in the efficient set.When surpassing a predetermined pilot signal detection threshold T_ADD from the intensity of one of adjacent cell pilot signal or exceed intensity 0.5 * T_COMP dB from one of one of efficient cell set sub-district pilot signal (wherein T_COMP is a threshold values relatively), this WTRU just with measurement report to network.Based on the measurement result of WTRU report, whether this network decision assigns a channel to the WTRU in a Target cell.
In some systems such as CDMA2000 system, intensity has been crossed a network specified threshold but has not been had also that strong be added to this candidate collection or sub-district in the sub-district strong to being enough to be considered to be in the efficient set to being enough to list in " candidate collection (candidate set) " that adjacent cell in the efficient cell set is called as the sub-district, and measurement report can be sent to network.Term " candidate collection " mean hereinafter WTRU can be when network specifies benchmark to be satisfied to the set of the adjacent cell of network-reporting measurement result (that is not the sub-district in efficient set).The CDMA2000 candidate collection only is the one example.
Accuse the set of the adjacent cell (that is not the sub-district in efficient set) of measurement result.The CDMA2000 candidate collection only is the one example.
Term " selected wave beam (selected beam) " means the antenna beam that a WTRU is used for carrying out its transfer of data and reception.One uses a WTRU who switches beam antenna to utilize the measurement of this selected wave beam execution for adjacent cell usually.The trigger event of measurement report system is to utilize the basis that is measured as that this selected wave beam carries out.
The threshold values of measurement report (for example T_ADD and/or T_COMP) normally uses an omnidirectional antenna at WTRU but not one switches under the hypothesis of beam antenna and set up.One switches beam antenna (that is an intelligent antenna) produces a narrow beam, and it advantageously improves the signal strength signal intensity in the wireless communication system.But when WTRU utilized one to switch beam antenna with a service base All-China Federation of Taiwan Compatriots network, this antenna transferred a specific direction to, and therefore can be influenced for the physical measurement from the signal of adjacent cell by antenna direction.
Fig. 1 draws a legacy wireless communication system 100, and it comprises a WTRU 120 and utilizes one to switch directional beam 140 and comprise an one of base station (BS) 160 Serving cell and communicate by letter.Because the gain of directional beam 140 is oriented to-specific direction,, also can't be detected rightly from the signal of the base station 180 of adjacent cell even adjacent cell is nearer than Serving cell 160.
Received signal intensity from adjacent cell may the too for a short time transmission that is not enough to trigger to the measurement report of network of amplitude.Therefore-soft handoff may can't be triggered, the quantity that this may cause the rigid switching of higher rate and increase communicating interrupt (dropped calls).
Summary of the invention
Because the foregoing invention background, one of the present invention purpose is to maintain in the multi-cell wireless communication system on line state that switches one of beam antenna running mobile wireless transmission unit (WTRU) with.
According to this described and other purpose of the present invention, feature, and advantage provide by a kind of method of in a wireless communication system, measuring of carrying out with a switching of switching one of beam antenna running mobile wireless transmission unit (WTRU).
This switched beam antenna can be the intelligent antenna of a plurality of directional beams of generation and an omni-beam.This WTRU utilizes one of this omni-beam and/or described directional beam or many persons to measure signal from a plurality of sub-districts.This WTRU assessment and possess the measurement result of the omni-beam of the strongest measurement result or directional beam to increase sub-district to efficient cell set to network-reporting.This WTRU also assesses and the measurement result of the antenna beam in this efficient cell set of network-reporting is removed the sub-district to gather from this efficient cell.
Carry out that antenna beam is measured and to one of the method for network-reporting measurement result first embodiment system to receive and to measure the signal in the omni-beam.
Carry out that antenna beam is measured and to one of the method for network-reporting measurement result second embodiment system based on receive and measure be used to the efficient cell set in one of in the preferential direction wave beam of sub-district swap data and the signal in the omni-beam.
Carry out that antenna beam is measured and to one of the method for network-reporting measurement result the 3rd embodiment system to receive and to measure the signal in all antenna beams.
Carry out that antenna beam is measured and to one of the method for network-reporting measurement result the 4th embodiment system to receive and to measure the signal in one of the antenna beam respective subset.Each respective antenna beam subset may be had nothing in common with each other to each sub-district.These respective antenna beam subset can be chosen based on the position of sub-district, and/or can be by based on the previous measurement result of sub-district and/or any other parameter or benchmark and choose.
Carry out that antenna beam is measured and receive and measure to utilize all wave beams from the signal in one of candidate set subset of cells to one of the method for network-reporting measurement result the 5th embodiment system.Subset of cells from candidate set can be chosen relatively to be correlated with a measured signal and a threshold values.This threshold values can be by network settings, and perhaps this threshold values can be based on the measurement result above the sub-district in the efficient cell set and reaches a scheduled volume.
Carry out that antenna beam is measured and to one of the method for network-reporting measurement result the 6th embodiment system based in receiving and measure from one of candidate set subset of cells and the signal in one of the antenna beam respective subset.
When only measuring with selected wave beam, may the too for a short time transmission that is not enough to trigger to the measurement report of network of amplitude from the received signal power of adjacent cell.Therefore, a soft handoff may can't be triggered, the quantity that this may cause the rigid switching of higher rate and increase communicating interrupt.
By the present invention, WTRU advantageously assesses and gathers for increasing sub-district to efficient cell to possess the omni-beam of strong measurement result and/or the measurement result of the signal that directional beam is received from the sub-district to network-reporting.By gathering for the basis increases sub-district to efficient cell according to first to the 6th examples measure signal, soft handoff may is improved, and causes in a multi-cell wireless communication system to be kept better with an on line state that switches the mobile WTRU of beam antenna running.
Another viewpoint of the present invention is at a kind of efficient cell set, a candidate set, and wireless communication system that is used to implement the WTRU of first to the 6th embodiment of comprising.This WTRU can comprise switched beam antenna, one is connected in the transceiver of this switched beam antenna, one is connected to the measuring unit that this transceiver is used to measure received signal, an and controller that is used for the comparison measured signal, and when one of sub-district one of in this candidate set measurement result satisfies a report benchmark, one of in for example greater than this efficient cell set during the measurement result of one of sub-district, sends a measurement report to network.
Description of drawings
Fig. 1 is one according to one of prior art wireless communication system and the sketch that has a wireless transmission/receive unit (WTRU) to operate in this system.
Fig. 2 is one according to one of the present invention wireless communication system and the sketch that has a wireless transmission/receive unit (WTRU) to operate in this system.
Fig. 3 is one of WTRU shown in Figure 2 calcspar.
Fig. 4-Fig. 9 is the flow chart that is used for carrying out the corresponding embodiment that the switching of the WTRU in the wireless communication system shown in Figure 2 measures.
Figure 10 is used for increasing the flow chart of base station to the set of one of wireless communication system shown in Figure 2 pre-candidate cell.
Embodiment
The appended graphic the present invention that illustrates in greater detail of following reference, preferred embodiment of the present invention shown in it.Right the present invention can be by with many multi-form enforcements and should not be interpreted as only limiting to the embodiment that this specification is mentioned.In fact these embodiment are in order to make this specification more thorough complete and provide, and can be to haveing the knack of this skill person's complete transmission scope of the present invention.Represent same components with same numbers in full.
With reference to Fig. 2 and Fig. 3, illustrate that a wireless communication system 200 and is used for the wireless transmission/receive unit (WTRU) 220 that operates in this wireless communication system at the beginning.WTRU 220 comprises a switched beam antenna 230 that is used to produce antenna beam, and these antenna beams comprise a plurality of directional beams 240 and an omni-beam 250.Directional beam shown in the figure 240 be one be used for the preceding of switching or afterwards with the switching-beam of a Serving cell 260 contact.As hereinafter describing in detail, omni-beam 250 and/or directional beam 240 are used to switch over operation, and the signal that comprises by measuring from adjacent cell 280 detects a trigger event.
Base station 260,280 can be Jie's tipping of any other type in site controller (site controllers), access point or the wireless environment and puts, as has the knack of this skill person and can understand easily.Wireless communication system 200 can be applicable to time division duplex (TDD), frequency division multi-task (FDD) and the timesharing S-CDMA (TD-SCDMA) that is performed in a Universal Mobile Telecommunications System (UMTS), a code division multiple access (CDMA) 2000 systems for instance, and general CDMA, as have the knack of this skill person and can understand easily.
WTRU 220 comprises the device that can operate in a wireless environment, for instance for example user's equipment (UE), travelling carriage, moving user unit and calling set.WTRU 220 comprises that a wave beam switch unit 320, that is connected in switched beam antenna 230 is connected in the transceiver 340 of this wave beam switch unit, and a measuring unit 360 that is connected in this transceiver, as shown in Figure 3.Measuring unit 360 is measured the signal of receiving from different sub-districts.With regard to a cdma system, the preferable pilot signal that utilizes carries out these measurements.Any other signal used as said purpose that so can also send from the sub-district.
One controller 380 is connected to transceiver 340, measuring unit 360, reaches wave beam switch unit 320 for control.One threshold unit 390 also is connected to controller 380.Threshold unit 390 can comprise that one is used to store and is used for the threshold values of making comparisons with the measurement that measuring unit 360 is carried out.As hereinafter describing in detail, these threshold values comprise the parameter of being set by controller 380 that is used for preliminary election and candidate cell.
Below will illustrate with switched beam antenna running in carry out that antenna beam is measured and to six different preferred embodiments of the method for network-reporting measurement result.In all embodiments, no matter the wave beam that is used to measure how, selected wave beam continue to be used to the efficient cell set in the base station contact.
With switched beam antenna 230 running in carry out that antenna beam is measured and be shown in the flow chart of Fig. 4 to first embodiment of the method for network-reporting measurement result.From (square 400), WTRU 220 utilizes a selected antenna beam and one or more sub-district in the efficient cell set to carry out exchanges data at square 402, and square 404 utilize omni-beam 250 from this efficient cell is gathered the sub-district and the sub-district received signal from candidate set.Measure the received signal of utilizing omni-beam 250 to receive at square 406.
The measured signal that WTRU 220 compares in the omni-beam 250 at square 408.At square 410, when the measured signal of sub-district one of in this candidate set sends a measurement report to network when the measured signal of sub-district surpasses a report threshold criteria one of in this efficient cell set.This method ends at square 412.The method repeats to carry out to measure for carrying out next group from square 400.
Second embodiment is shown in the flow chart of Fig. 5.From (square 500), WTRU 220 utilizes a selected antenna beam and efficient cell to carry out exchanges data in the sub-district one of in gathering at square 502.Square 504 utilize this selected directional beam and omni-beam from this efficient cell set the sub-district and the sub-district received signal from a candidate set.Utilize this selected directional beam and the two received signal of receiving of omni-beam in square 506 measurements.Choose from each sub-district in the set of this efficient cell and this candidate set at square 508 and to have the measured signal of high numerical value.That is to say, choose the highest measured signal (omni-beam is measured or selected directional beam and measures) of each sub-district.
The measured signal that relatively is selected at square 510.At square 512, when the measured signal that is selected of sub-district one of in this candidate set sends a measurement report to network when the measured signal that is selected of sub-district surpasses a report threshold criteria one of in this efficient cell set.This method ends at square 514.The method repeats to carry out to measure for carrying out next group from square 500.
The 3rd embodiment is shown in the flow chart of Fig. 6.From (square 600), utilize a selected antenna beam and one or more sub-district in the efficient cell set to carry out exchanges data at square 602, square 604 utilize a plurality of directional beams and omni-beam from this efficient cell is gathered the sub-district and the sub-district received signal from candidate set.
Measure the received signal of utilizing each directional beam and omni-beam to receive at square 606.Choose from each sub-district in the set of this efficient cell and this candidate set at square 608 and to have the measured signal of high numerical value.That is to say, choose the highest measured signal (omni-beam is measured or the highest directional beam is measured) of each sub-district.The measured signal that relatively is selected at square 610.At square 612, when the measured signal that is selected of sub-district one of in this candidate set sends a measurement report to network when the measured signal that is selected of sub-district surpasses a report threshold criteria one of in this efficient cell set.This method ends at square 614.The method repeats to carry out to measure for carrying out next group from square 600.
The 4th embodiment is shown in the flow chart of Fig. 7.From (square 700), utilize a selected antenna beam and one or more sub-district in the efficient cell set to carry out exchanges data at square 702, and choose at square 704 and to be used for one of each sub-district that this efficient cell gathers and the antenna beam of each sub-district that is used for candidate set subclass.The antenna beam subclass that is used for each sub-district must be for all sub-districts be all the same, and perhaps must decide on parameter or benchmark such as subdistrict position and/or for example previous measurement result of out of Memory is that each sub-district is different separately.
The measured signal that relatively is selected at square 712.At square 714, when the measured signal that is selected of sub-district one of in this candidate set sends a measurement report to network when the measured signal that is selected of sub-district surpasses a report threshold criteria one of in this efficient cell set.This method ends at square 716.The method repeats to carry out to measure for carrying out next group from square 700.
The 5th embodiment is shown in the flow chart of Fig. 8.From (square 800), utilize one or more sub-district in a selected antenna beam and the efficient cell set to carry out exchanges data at square 802.Square 804 utilize this selected antenna beam from the set of this efficient cell the sub-district and the sub-district received signal from a candidate set.
Measure the received signal of utilizing this selected antenna beam to receive at square 806.At square 808 is that a subset of cells is selected from this candidate set in the basis with the measured signal.When choosing this subset of cells, WTRU 220 for instance can measurement result, have the sub-district of the measurement result that is higher than a reservation threshold or have that to surpass the sub-district that an efficient set cell measurement results reaches the measurement result of a reservation threshold be that the basis is selected.Optionally, this subset of cells can comprise whole measured cells.
At square 810, utilize a plurality of directional beams and omni-beam from the set of this efficient cell each sub-district and each the sub-district received signal from this subset of cells, and utilize this selected antenna beam from this candidate set, not belong to the sub-district received signal (optionally multi-beam more can be used for these sub-districts) of this subset of cells at least.Measure received signal at square 812.
At square 814, each sub-district from the set of this efficient cell, each sub-district from this subset of cells and the sub-district that does not belong to this subset of cells from this candidate set are selected has the measured signal of high numerical value.That is to say, choose the highest measured signal of each sub-district.
The measured signal that relatively is selected at square 816.At square 818, when the measured signal that is selected of sub-district one of in this candidate set sends a measurement report to network when the measured signal that is selected of sub-district surpasses a report threshold criteria one of in this efficient cell set.This method ends at square 820.The method repeats to carry out to measure for carrying out next group from square 800.
The 6th embodiment is shown in the flow chart of Fig. 9.From (square 900), utilize one or more sub-district in a selected antenna beam and the efficient cell set to carry out exchanges data at square 902.Square 904 utilize this selected antenna beam from the set of this efficient cell the sub-district and the sub-district received signal from a candidate set.Measure received signal at square 906.
At square 908 is that a subset of cells is selected from this candidate set in the basis with the measured signal.When choosing this subset of cells, WTRU 220 for instance can measurement result, have the sub-district of the measurement result that is higher than a reservation threshold or have that to surpass the sub-district that an efficient set cell measurement results reaches the measurement result of a reservation threshold be that the basis is selected.Optionally, this subset of cells can comprise whole measured cells.
Choose each sub-district that is used for the set of this efficient cell and be used for one of the antenna beam subclass of each sub-district of the subset of cells of this candidate set at square 910.As previously mentioned, the antenna beam subclass that is used for each sub-district must be for all sub-districts be all the same, and perhaps must decide on parameter or benchmark such as subdistrict position and/or for example previous measurement result of out of Memory is that each sub-district is different separately.
The measured signal that relatively is selected at square 918.At square 920, when the measured signal that is selected of sub-district one of in this candidate set sends a measurement report to network when the measured signal that is selected of sub-district surpasses a report threshold criteria one of in this efficient cell set.This method ends at square 922.The method repeats to carry out to measure for carrying out next group from square 900.
In above-mentioned first to the 6th embodiment, preferably WTRU 220 one of can be in from this efficient cell set the measured signal of sub-district in this selected antenna beam drop to a report threshold criteria and inform network when following.Can use other method, for example utilize omni-directional beam measurement.
In first to the 6th embodiment, the report threshold criteria is known any this type of benchmark of WRT, and it is a preceding fixed condition (priori) or the order that is provided by network usually.These report threshold criteria may relate to indivedual measurements of considering a sub-district, the combination of repeatedly measuring (for example indivedual measure average) of a sub-district for instance, and may relate to the measurement of any kind, for example signal-to-jamming ratio (SIR) or average SIR, signal to noise ratio, and signal strength signal intensity.In addition, the report threshold criteria can comprise the multiple parameter that will consider, a fixing threshold values for example, one is measured as the threshold values on basis with other, and in the quantity of the preceding measuring operation that must keep satisfying a condition of making a measurement report or ratio, 3 in 5 for example.
As described in the background of invention section, in some systems such as CDMA2000, intensity has been crossed a network specified threshold but still has been not enough to be put into the interior adjacent cell of efficient set and has been called as candidate collection.When the sub-district added to candidate collection and when the sub-district by force when being enough to be considered to be efficient set, measurement report is sent to network.
WTRU preferably assesses and is received in from the sub-district to network-reporting possesses the omni-beam of strong measurement result and/or the measurement result of the signal in the directional beam is gathered to increase sub-district to efficient cell.In first to the 6th embodiment by being that the basis increases sub-district to efficient cell and gathers with the measuring-signal, soft handoff may is improved, and causes in a multi-cell wireless communication system to be kept better with an on line state that switches the mobile WTRU of beam antenna running.
Another viewpoint of the present invention system is at a kind ofly comprising one of one of sub-district 260 efficient set, sub-district 280 candidate collection, and being used to implement the wireless communication system 200 of one of first to the 6th embodiment WTRU 220 as previously mentioned.Particular words it, WTRU 220 comprises a controller 380, and it is used for the comparison measured signal and sends a measurement report to network in the measured signal that is selected of one of this candidate set sub-district when the measured signal that is selected of sub-district surpasses a report threshold criteria one of in this efficient cell set.
First to the 6th embodiment measures the sub-district in the candidate collection.But, in some cases, may in selected wave beam, significantly do not decayed to from the signal of adjacent cell and can be surpassed the threshold values that is added to this candidate collection.This can cause postponement to enter soft handoff may once more and be deep and thorough in new sub-district carrying out the preceding of soft handoff may probably.
Modern flow chart with reference to Figure 10, another viewpoint of the present invention is the method for measurement that does not belong to the adjacent cell of candidate set at a kind of implementation, makes adjacent cell can be identified whether should be candidate collection before only being performed normally that selected wave beam measures.The adjacent cell that does not belong to the set of candidate set or efficient cell is in one " pre-candidate cell set ".Use following threshold values:
Set Tthresh=one WTRU definition threshold values, it is used for a pre-candidate set (also be called as and increase pre-candidate set threshold);
Set Tadd=one network definition threshold values, it is used to increase a sub-district to candidate collection and to network-reporting measurement result (also be called as and increase candidate set threshold);
Set Tdrop_c=one network definition threshold values, it is used for removing a sub-district and to network-reporting measurement result (also being called as the deletion candidate set threshold) from candidate collection;
Set Tdrop_a=one network definition threshold values, it is used for to the measurement result of one of network-reporting efficient cell set sub-district and possesses network ordering WTRU to remove the expected result (also being called as deletion efficient set threshold values) of this sub-district from the efficient cell set;
Set T_COMP=one network definition value, its appointment will trigger to network-reporting one measurement result and the difference of the sub-district that one of can expection can cause networking command WTRU to increase a candidate cell during this candidate cell institute must gather above efficient cell when efficient cell gather; And
Set T_COMPA=one WTRU definition threshold values, its 〉=T_COMP.
Increase the program of gathering to pre-candidate cell set, candidate set and efficient cell the sub-district and be shown in Figure 10.From (square 1000), utilize one or more sub-district in a selected antenna beam and the efficient cell set to carry out exchanges data at square 1002.Utilize this selected antenna beam never to belong to a plurality of sub-districts received signal of this efficient cell set at square 1004.Measure the signal that receive the sub-district that never belongs to this efficient cell set at square 1006.
Compare measured signal and Tthresh threshold values at square 1008.When the signal strength signal intensity that does not belong to one of this efficient set sub-district (recording with selected antenna beam) surpasses Tthresh, this sub-district is added in the pre-candidate set of being kept by WTRU 220.Tthresh is less than or equal to Tadd.The position standard of the measured signal of the sub-district in square 1010 is gathered with this pre-candidate cell is the described sub-district of seniority among brothers and sisters, basis then.
Utilize omni-beam and the preceding N name sub-district received signal of selected antenna beam from this pre-candidate cell set at square 1012.N is more than or equal to 1.Utilize this omni-beam and select antenna beam each signal of receiving in square 1014 measurements from a described N sub-district.
In square 1016 relatively measured signal and Tadd threshold values, and serve as to move on to candidate set basic respective cell is gathered from this pre-candidate cell with comparison (that is whether surpassing this threshold values) with this Tadd threshold values.Send one of each sub-district be moved to this candidate set measurement report (possessing omni-directional beam measurement) to network at square 1018.
In addition, the big T_COMP of signal strength signal intensity of any one or more sub-district sends a measurement report (the omnidirectional measurement result who possesses this candidate cell) to network in the signal intensity ratio that utilizes omni-beam 250 one of to record candidate cell utilizes the efficient cell set that this omni-beam records.Network orders WTRU 220 that this candidate cell is moved on to the efficient cell set usually.The use of pre-candidate cell set thereby promotion WTRU 220 increase sub-district to efficient cell with regard to time point quickly than a WTRU of only having omni-directional capabilities and gather.The method ends at square 1020.The method repeats to carry out to measure for carrying out next group from square 1000.
As described below from the program of candidate set and pre-candidate cell set removal (deletion) sub-district.When the selected beam signal intensity of a pre-candidate cell is lower than Tthresh, remove this pre-candidate cell (whether only measure or measure have nothing to do by selected antenna beam and omni-beam) with selected wave beam with it from pre-candidate set.
When the omni-beam signal strength signal intensity of a candidate cell drops to below the Tdrop_c, delete this sub-district from candidate set, and send a measurement report (possessing omni-directional beam measurement) to network.If surpassing Tthresh, the selected beam signal intensity of this sub-district then this sub-district is added in the pre-candidate cell set.
As described below from the program of efficient cell set deletion sub-district.If a) the omni-beam signal strength signal intensity that the selected antenna beam signal intensity of sub-district is lower than Tdrop_a and this sub-district one of in the efficient cell set is lower than Tadd; And/or b) the selected antenna beam signal intensity of sub-district is lower than the little T_COMPA of omni-beam signal strength signal intensity (SIR_Best) of the best cell in this efficient cell set of omni-beam signal intensity ratio of Tdrop_a and this sub-district one of in the efficient cell set; And/or c) the selected antenna beam signal intensity of sub-district is lower than Tdrop_a and Tthresh≤Tdrop_a one of in the efficient cell set, and then following is true.
Send measurement report (possessing selected antenna beam measurement result) to network.Pre-interim network can order WTRU220 to remove this sub-district from the efficient cell set.In case be removed, this sub-district only can be added under selected antenna beam signal intensity surpasses the condition of Tthresh in the pre-candidate cell set.
The omni-beam measurement is used to the sub-district is added to different set of cells, and selected antenna beam measurement is used to from different set of cells deletion sub-districts.For avoiding a ping-pong, deletion consider condition a), b) and c) each guarantees that the sub-district can be by in horse back add-back candidate set or the efficient cell set.
With regard to a), omni-directional beam measurement must be lower than Tadd, and this prevents sub-district add-back candidate collection.With regard to b), omni-directional beam measurement must be far below the best cell in the efficient set; Unless in the efficient cell set very poor sub-district is arranged, otherwise this sub-district can be by in the set of add-back efficient cell.With regard to c), one possesses the sub-district that is lower than one of Tthresh signal strength signal intensity will not be by in the set of add-back pre-candidate cell.
The above supposes that from the program of efficient cell set deletion sub-district a sub-district stays in the efficient set forever.It is as described below to be used to delete one of sub-district example: Tadd=-14dB, Tdrop_a=-16dB, Tthresh=-22dB, and T_COMPA=3dB.
In above all programs, based on a threshold values relatively take mobile can be with one be measured as the basis or one section the waiting period after, in the middle of this waits for the interim measurement that predetermined number of times must be arranged or the measurement of predetermined number of times, have a certain proportion of measurement to keep situation (for example surpass or be lower than threshold values) for true.
Have the knack of this skill person can find out the benefit with the disclosure that presents in above explanation and correlative type many modified forms and other embodiment of the present invention.It is accordingly to be appreciated that the specific embodiment that the present invention is not limited to disclose, and wish that these modifications and embodiment are inclusive in the described scope of appended claim.
Claims (50)
1. the method for an operate wireless transmission unit (WTRU) in comprising the wireless communication system of a plurality of sub-districts, this WTRU comprises that one is used for producing the switched beam antenna of the antenna beam that comprises a plurality of directional beams and an omni-beam, this method comprises:
Utilize a selected antenna beam and an efficient cell gather in one or more sub-district carry out exchanges data;
Utilize this omni-beam from efficient cell set the sub-district and the sub-district received signal from a candidate set;
The received signal that measurement utilizes this omni-beam to receive from each sub-district;
More described measured signal; And
When the measured signal of the measured signal of sub-district sub-district in this efficient cell set surpasses a report threshold criteria in this candidate set, send a measurement report to network.
2. method according to claim 1 is characterized in that, this report threshold criteria comprises following at least one:
One fixing threshold values, or based on the threshold values of described measured signal, and based on one of a plurality of parameters of in a predetermined time interval, taking place threshold values.
3. method according to claim 1 is characterized in that, this wireless communication system comprises a code division multiple access (CDMA) system.
4. method according to claim 1 is characterized in that, measured described received signal comprises a pilot signal.
5. method according to claim 1 is characterized in that, this measuring process comprises measures one of described received signal signal-to-jamming ratio (SIR), a signal to noise ratio, and at least one of a signal strength signal intensity.
6. the method for an operate wireless transmission unit (WTRU) in comprising the wireless communication system of a plurality of sub-districts, this WTRU comprises that one is used for producing the switched beam antenna of the antenna beam that comprises a plurality of directional beams and an omni-beam, this method comprises:
Utilize a selected antenna beam and an efficient cell gather in one or more sub-district carry out exchanges data;
Utilize this selected wave beam and this omni-beam from the set of this efficient cell the sub-district and the sub-district received signal from a candidate set;
Measurement utilizes this selected wave beam and the two received signal of receiving from each sub-district of this omni-beam;
From each sub-district of the set of this efficient cell and this candidate set, choose and have the measured signal of high numerical value;
The measured signal that relatively is selected; And
The measured signal that is selected of a sub-district during being selected measured signal and surpassing a report threshold criteria of sub-district, sends a measurement report to network one of in the set of this efficient cell in this candidate set.
7. method according to claim 6 is characterized in that, this report threshold criteria comprises following at least one:
One fixing threshold values, or based on the threshold values of described measured signal, and based on one of a plurality of parameters of in a predetermined time interval, taking place threshold values.
8. method according to claim 6 is characterized in that, this wireless communication system comprises a code division multiple access (CDMA) system.
9. method according to claim 6 is characterized in that, measured described received signal comprises a pilot signal.
10. method according to claim 6 is characterized in that, this measuring process comprises measures one of described received signal signal-to-jamming ratio (SIR), a signal to noise ratio, and at least one of a signal strength signal intensity.
11. the method for an operate wireless transmission unit (WTRU) in comprising the wireless communication system of a plurality of sub-districts, this WTRU comprises that one is used for producing the switched beam antenna of the antenna beam that comprises a plurality of directional beams and an omni-beam, and this method comprises:
Utilize a selected antenna beam and an efficient cell gather in one or more sub-district carry out exchanges data;
Utilize described a plurality of directional beam and this omni-beam from efficient cell set the sub-district and the sub-district received signal from a candidate set;
The received signal that measurement utilizes each directional beam and this omni-beam to receive from each sub-district;
From each sub-district of the set of this efficient cell and this candidate set, choose and have the measured signal of high numerical value;
The measured signal that relatively is selected; And
The measured signal that is selected of a sub-district during being selected measured signal and surpassing a report threshold criteria an of sub-district, sends a measurement report to network in the set of this efficient cell in this candidate set.
12. method according to claim 11, it is characterized in that, this report threshold criteria comprises following at least one: a fixing threshold values, or based on the threshold values of described measured signal, and based on one of a plurality of parameters of in a predetermined time interval, taking place threshold values.
13. method according to claim 11 is characterized in that, this wireless communication system comprises a code division multiple access (CDMA) system.
14. method according to claim 11 is characterized in that, measured described received signal comprises a pilot signal.
15. method according to claim 11 is characterized in that, this measuring process comprises measures one of described received signal signal-to-jamming ratio (SIR), a signal to noise ratio, and at least one of a signal strength signal intensity.
16. the method for an operate wireless transmission unit (WTRU) in comprising the wireless communication system of a plurality of sub-districts, this WTRU comprises that one is used for producing the switched beam antenna of the antenna beam that comprises a plurality of directional beams and an omni-beam, and this method comprises:
Utilize a selected wave beam and an efficient cell gather in a sub-district carry out exchanges data;
Choose each sub-district that is used for efficient cell set and be used for one of the antenna beam respective subset of each sub-district of a candidate set;
Utilize the respective antenna beam subset, sub-district from this efficient cell set and the sub-district received signal from this candidate set;
Measurement is from the received signal of each sub-district of each respective antenna beam subset;
From each sub-district of the set of this efficient cell and this candidate set, choose and have the measured signal of high numerical value;
The measured signal that relatively is selected; And
The measured signal that is selected of a sub-district during being selected measured signal and surpassing a report threshold criteria an of sub-district, sends a measurement report to network in the set of this efficient cell in this candidate set.
17. method according to claim 16, it is characterized in that, this report threshold criteria comprises following at least one: a fixing threshold values, or based on the threshold values of described measured signal, and based on one of a plurality of parameters of in a predetermined time interval, taking place threshold values.
18. method according to claim 16 is characterized in that, the respective antenna beam subset difference of each sub-district.
19. method according to claim 16 is characterized in that, the respective antenna beam subset of each sub-district is identical.
20. method according to claim 16 is characterized in that, described respective antenna beam subset is to select based on the position of described sub-district.
21. method according to claim 16 is characterized in that, described respective antenna beam subset is to select with before being measured as the basis of described sub-district.
22. method according to claim 16 is characterized in that, this wireless communication system comprises a code division multiple access (CDMA) system.
23. method according to claim 16 is characterized in that, measured described received signal comprises a pilot signal.
24. method according to claim 16 is characterized in that, this measuring process comprises measures one of described received signal signal-to-jamming ratio (SIR), a signal to noise ratio, and at least one of a signal strength signal intensity.
25. the method for an operate wireless transmission unit (WTRU) in comprising the wireless communication system of a plurality of sub-districts, this WTRU comprises that one is used for producing the switched beam antenna of the antenna beam that comprises a plurality of directional beams and an omni-beam, and this method comprises:
Utilize a selected antenna beam and an efficient cell gather in one or more sub-district carry out exchanges data;
Utilize this selected antenna beam from the set of this efficient cell the sub-district and the sub-district received signal from a candidate set;
Measure the received signal that this selected antenna beam is received from each sub-district;
With the measured signal relevant with this candidate set serves as that a subset of cells is selected from this candidate set in the basis;
Utilize described a plurality of directional beam and this omni-beam, each sub-district from the set of this efficient cell and each the sub-district received signal from this subset of cells, and utilize this selected antenna beam from this candidate set, not belong to received signal in the sub-district of this subset of cells at least;
Measure described received signal;
Each sub-district from the set of this efficient cell, each sub-district in this subset of cells, and this candidate set in do not belong to choose in the sub-district of this subset of cells and have the measured signal of high numerical value;
The measured signal that relatively is selected; And
The measured signal that is selected of a sub-district during being selected measured signal and surpassing a report threshold criteria an of sub-district, sends a measurement report to network in the set of this efficient cell in this candidate set.
26. method according to claim 25 is characterized in that, this report threshold criteria comprises following at least one: fixation measuring number of times, and the fixation measuring number of times of set measurement number of times.
27. method according to claim 25 is characterized in that, is based on a more relative measured signal and a threshold values from this subset of cells of this candidate set.
28. method according to claim 25 is characterized in that, this threshold values is to be set by this network.
29. method according to claim 25 is characterized in that, this threshold values is to reach a scheduled volume based on the measurement result that surpasses from sub-district in this efficient cell set.
30. method according to claim 25 is characterized in that, this wireless communication system comprises a code division multiple access (CDMA) system.
31. method according to claim 25 is characterized in that, measured described received signal comprises a pilot signal.
32. method according to claim 25 is characterized in that, this measuring process comprises measures one of described received signal signal-to-jamming ratio (SIR), a signal to noise ratio, and at least one of a signal strength signal intensity.
33. the method for an operate wireless transmission unit (WTRU) in comprising the wireless communication system of a plurality of base stations, each base station is under the jurisdiction of a sub-district, this WTRU comprises that one is used for producing the switched beam antenna of the antenna beam that comprises a plurality of directional beams and an omni-beam, and this method comprises:
Utilize a selected antenna beam and an efficient cell gather in one or more sub-district carry out exchanges data;
Utilize this selected antenna beam from the set of this efficient cell the sub-district and the sub-district received signal from a candidate set;
Measurement is from the received signal of each sub-district;
With the measured signal relevant with this candidate set serves as that a subset of cells is selected from this candidate set in the basis;
Choose one of the antenna beam subclass of each sub-district of subset of cells that is used for this efficient cell each sub-district of set and is used for this candidate set;
Utilize the respective antenna beam subset, sub-district from this efficient cell set and the subset of cells received signal from this candidate set, and utilize the sub-district received signal of this selected antenna beam from this candidate set at least;
Measure the received signal of each respective antenna beam subset;
Each sub-district from the set of this efficient cell, each sub-district in this subset of cells, and this candidate set in do not belong to choose in the sub-district of this subset of cells and have the measured signal of high numerical value;
The measured signal that relatively is selected; And
The measured signal that is selected of a sub-district during being selected measured signal and surpassing a report threshold criteria an of sub-district, sends a measurement report to network in the set of this efficient cell in this candidate set.
34. method according to claim 33, it is characterized in that, this report threshold criteria comprises following at least one: a fixing threshold values, or based on the threshold values of described measured signal, and based on one of a plurality of parameters of in a predetermined time interval, taking place threshold values.
35. method according to claim 33 is characterized in that, is based on a more relative measured signal and a threshold values from this subset of cells of this candidate set.
36. method according to claim 33 is characterized in that, this threshold values is to be set by this network.
37. method according to claim 33 is characterized in that, this threshold values is to reach a scheduled volume based on the measurement result that surpasses from sub-district in this efficient cell set.
38. method according to claim 33 is characterized in that, the respective antenna beam subset difference of each sub-district.
39. method according to claim 33 is characterized in that, the respective antenna beam subset of each sub-district is identical.
40. method according to claim 33 is characterized in that, described respective antenna beam subset is selected based on the position of described sub-district.
41. method according to claim 33 is characterized in that, described respective antenna beam subset was selected before to be measured as the basis.
42. method according to claim 33 is characterized in that, this wireless communication system comprises a code division multiple access (CDMA) system.
43. method according to claim 33 is characterized in that, measured described received signal comprises a pilot signal.
44. method according to claim 33 is characterized in that, this measuring process comprises measures one of described received signal signal-to-jamming ratio (SIR), a signal to noise ratio, and at least one of a signal strength signal intensity.
45. a wireless communication system comprises:
The set of one efficient cell;
One candidate set; And
One wireless transmission/receive unit (WTRU), it comprises
One switches beam antenna, is used to produce the antenna beam that comprises a plurality of directional beams and an omni-beam,
One transceiver is connected with this switched beam antenna, is used for utilizing this omni-beam and from the sub-district of this efficient cell set and the sub-district received signal from this candidate set;
One measuring unit is connected to this transceiver, is used to measure the received signal of utilizing this omni-beam to receive from each sub-district, and
One controller is used for more described measured signal, and the measured signal that is selected of a sub-district during being selected measured signal and surpassing a report threshold criteria an of sub-district, sends a measurement report to network in the set of this efficient cell in this candidate set.
46. a wireless communication system comprises:
The set of one efficient cell;
One candidate set; And
One wireless transmission/receive unit (WTRU), it comprises
One switches beam antenna, is used to produce the antenna beam that comprises a plurality of directional beams and an omni-beam, and chooses an antenna beam and carry out exchanges data in order to one or more sub-district in gathering with this efficient cell,
One transceiver is connected in this switched beam antenna, is used for utilizing this to be selected wave beam and this omni-beam and from the sub-district of this efficient cell set and the sub-district received signal from this candidate set;
One measuring unit is connected to this transceiver, is used to measure the received signal of utilizing this to be selected wave beam and this omni-beam and receiving from each sub-district, and
One controller, be used for choosing and have the measured signal of high numerical value from the set of this efficient cell and each sub-district of this candidate set, the more described measured signal that is selected, and the measured signal that is selected of a sub-district during being selected measured signal and surpassing a report threshold criteria an of sub-district, sends a measurement report to network in the set of this efficient cell in this candidate set.
47. a wireless communication system comprises:
The set of one efficient cell;
One candidate set; And
One wireless transmission/receive unit (WTRU), it comprises
One switches beam antenna, is used to produce the antenna beam that comprises a plurality of directional beams and an omni-beam, and
One antenna beam is selected for one or more sub-district in gathering with this efficient cell and carries out exchanges data,
One transceiver is connected in this switched beam antenna, is used for utilizing described a plurality of directional beam and this omni-beam and from the sub-district of efficient cell set and the sub-district received signal from a candidate set;
One measuring unit is connected to this transceiver, is used to measure the received signal of utilizing each directional beam and this omni-beam and receiving from each sub-district, and
One controller, be used for choosing and have the measured signal of high numerical value from each sub-district of the set of this efficient cell and this candidate set, the more described measured signal that is selected, and the measured signal that is selected of a sub-district during being selected measured signal and surpassing a report threshold criteria an of sub-district, sends a measurement report to network in the set of this efficient cell in this candidate set.
48. a wireless communication system comprises:
The set of one efficient cell;
One candidate set; And
One wireless transmission/receive unit (WTRU), it comprises
One switches beam antenna, is used to produce the antenna beam that comprises a plurality of directional beams and an omni-beam, and is selected each sub-district that is used for this efficient cell set and the respective antenna beam subset that is used for each sub-district of this candidate set,
One transceiver is connected in this switched beam antenna, is used for utilizing the respective antenna beam subset and from the sub-district of this efficient cell set and the sub-district received signal from this candidate set;
One measuring unit is connected to this transceiver, is used to measure the received signal of utilizing each respective antenna beam subset and receiving from each sub-district, and
One controller, be used for choosing and have the measured signal of high numerical value from each sub-district of the set of this efficient cell and this candidate set, the more described measured signal that is selected, and the measured signal that is selected of a sub-district during being selected measured signal and surpassing a report threshold criteria an of sub-district, sends a measurement report to network in the set of this efficient cell in this candidate set.
49. a wireless communication system comprises:
The set of one efficient cell;
One candidate set; And
One wireless transmission/receive unit (WTRU), it comprises
One switches beam antenna, is used to produce the antenna beam that comprises a plurality of directional beams and an omni-beam, and chooses an antenna beam and carry out exchanges data in order to one or more sub-district in gathering with an efficient cell,
One transceiver is connected in this switched beam antenna, is used for utilizing this to be selected antenna beam from the sub-district of this efficient cell set and the sub-district received signal from this candidate set;
One measuring unit is connected to this transceiver, is used to measure utilize this to be selected the received signal that antenna beam is received from each sub-district, and
One controller, being used for the measured signal relevant with this candidate set serves as that a subset of cells is selected from this candidate set in the basis,
This transceiver also is used for utilizing described a plurality of directional beam and this omni-beam from each sub-district of this efficient cell set and each the sub-district received signal from this subset of cells, and utilize this to be selected antenna beam does not belong to this subset of cells from this candidate set sub-district received signal at least, this measuring unit also is used to measure described received signal
This controller also is used for
Each sub-district from the set of this efficient cell, each sub-district in this subset of cells, and this candidate set in do not belong to choose in the sub-district of this subset of cells and have the measured signal of high numerical value, the more described measured signal that is selected reaches
The measured signal that is selected of a sub-district during being selected measured signal and surpassing a report threshold criteria an of sub-district, sends a measurement report to network in the set of this efficient cell in this candidate set.
50. a wireless communication system comprises:
The set of one efficient cell;
One candidate set; And
One wireless transmission/receive unit (WTRU), it comprises
One switches beam antenna, is used to produce the antenna beam that comprises a plurality of directional beams and an omni-beam, and chooses an antenna beam and carry out exchanges data in order to one or more sub-district in gathering with an efficient cell,
One transceiver is connected in this switched beam antenna, is used for utilizing this to be selected antenna beam and from the sub-district of this efficient cell set and the sub-district received signal from a candidate set,
One measuring unit is connected to this transceiver, is used to measure the received signal of utilizing this to be selected antenna beam and receiving from each sub-district, and
One controller, being used for the measured signal relevant with this candidate set serves as that a subset of cells is selected from this candidate set in the basis, and select each sub-district that is used for this efficient cell set and the respective antenna beam subset that is used for each sub-district of this candidate set
This transceiver also is used for utilizing the respective antenna beam subset from the sub-district of this efficient cell set and from the subset of cells received signal of this candidate set, and utilize this to be selected antenna beam does not belong to this subset of cells from this candidate set sub-district received signal at least
This measuring unit also is used to measure the received signal of utilizing each respective antenna beam subset to receive from each sub-district,
This controller also is used for
Each sub-district from the set of this efficient cell, each sub-district in this subset of cells, and this candidate set in do not belong to choose in the sub-district of this subset of cells and have the measured signal of high numerical value, the more described measured signal that is selected reaches
The measured signal that is selected of a sub-district during being selected measured signal and surpassing a report threshold criteria an of sub-district, sends a measurement report to network in the set of this efficient cell in this candidate set.
Applications Claiming Priority (3)
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| US54196704P | 2004-02-05 | 2004-02-05 | |
| US60/541,967 | 2004-02-05 | ||
| US11/051,024 | 2005-02-04 |
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| CN101107867A true CN101107867A (en) | 2008-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005800040722A Expired - Fee Related CN100499905C (en) | 2004-02-05 | 2005-02-07 | Method for identifying pre-candidate cells for a mobile unit operating with a switched beam antenna in a wireless communication system, and corresponding system |
| CNA2005800040756A Pending CN101107867A (en) | 2004-02-05 | 2005-02-07 | Method for performing measurements for handoff of a mobile unit operating with a switched beam antenna |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005800040722A Expired - Fee Related CN100499905C (en) | 2004-02-05 | 2005-02-07 | Method for identifying pre-candidate cells for a mobile unit operating with a switched beam antenna in a wireless communication system, and corresponding system |
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| CN (2) | CN100499905C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101848485B (en) * | 2009-03-24 | 2012-11-07 | 电信科学技术研究院 | Method and device for indicating terminal to report measurement information |
| CN107069220A (en) * | 2016-01-14 | 2017-08-18 | 陶格拉斯集团控股公司 | Equipment, system and method for sighting directional aerial |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101394644B (en) * | 2007-09-20 | 2013-06-05 | 华为技术有限公司 | Wireless resource managing method and device |
| US9332464B2 (en) | 2009-06-19 | 2016-05-03 | Qualcomm Incorporated | Method and apparatus that facilitates measurement procedures in multicarrier operation |
| CN101594644B (en) * | 2009-07-02 | 2010-12-29 | 西安电子科技大学 | Signaling interaction method supporting CoMP operation set option |
| CN104754698B (en) * | 2013-12-31 | 2019-06-18 | 联芯科技有限公司 | Quickly resident small region search method and mobile terminal |
| US10111152B2 (en) * | 2015-12-09 | 2018-10-23 | Telefonaktiebolaget Lm Ericsson (Publ) | Cell selection for airborne mobile cellular communications equipment |
| US10863366B2 (en) | 2017-06-23 | 2020-12-08 | Qualcomm Incorporated | Receiver beamforming for serving and neighbor cell measurements |
| CN109842890B (en) | 2017-11-28 | 2021-06-22 | 华为技术有限公司 | Signal measurement method, related device and system |
-
2005
- 2005-02-07 CN CNB2005800040722A patent/CN100499905C/en not_active Expired - Fee Related
- 2005-02-07 CN CNA2005800040756A patent/CN101107867A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101848485B (en) * | 2009-03-24 | 2012-11-07 | 电信科学技术研究院 | Method and device for indicating terminal to report measurement information |
| CN107069220A (en) * | 2016-01-14 | 2017-08-18 | 陶格拉斯集团控股公司 | Equipment, system and method for sighting directional aerial |
Also Published As
| Publication number | Publication date |
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| CN1914935A (en) | 2007-02-14 |
| CN100499905C (en) | 2009-06-10 |
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