CN101959305A - Method for trying to pair users - Google Patents

Method for trying to pair users Download PDF

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Publication number
CN101959305A
CN101959305A CN200910151443XA CN200910151443A CN101959305A CN 101959305 A CN101959305 A CN 101959305A CN 200910151443X A CN200910151443X A CN 200910151443XA CN 200910151443 A CN200910151443 A CN 200910151443A CN 101959305 A CN101959305 A CN 101959305A
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China
Prior art keywords
user
base station
candidate
channel
pressure test
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CN200910151443XA
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Chinese (zh)
Inventor
雷海鹏
李小强
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Beijing Samsung Telecommunications Technology Research Co Ltd
Samsung Electronics Co Ltd
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Beijing Samsung Telecommunications Technology Research Co Ltd
Samsung Electronics Co Ltd
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Application filed by Beijing Samsung Telecommunications Technology Research Co Ltd, Samsung Electronics Co Ltd filed Critical Beijing Samsung Telecommunications Technology Research Co Ltd
Priority to CN200910151443XA priority Critical patent/CN101959305A/en
Priority to KR1020100069544A priority patent/KR20110007990A/en
Priority to PCT/KR2010/004705 priority patent/WO2011008060A2/en
Publication of CN101959305A publication Critical patent/CN101959305A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/06—Testing, supervising or monitoring using simulated traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The invention discloses a method for trying to pair users, which is suitable for a GSM/EDGE radio access network (GERAN)/voice services over adaptive multi-user channels on one slot (VAMOS) system. The method comprises the following steps that: a base station selects two users to serve as candidate users, wherein the timing condition of performing a pressure test is preset; the base station commands one candidate user to perform the pressure test in a time slot where the other candidate user is when the timing condition of performing the pressure test is met and to report channel states; and the base station adjusts the transmitting power of the two candidate users according to the channel states reported by the two candidate users until the channel quality of the two candidate users meets the channel quality requirements, multiplexes the two candidate users on the same time frequency resource and releases redundant resources. The invention also discloses another method for trying to pair the users. The method has the advantages of trying to pair the users, increasing the capacity of a system and reducing the dropped call rate of the system, without mobile stations of the users to support multi-slot treatment and without additional time slots.

Description

A kind of user tries matching method
Technical field
The present invention relates to wireless communication technology field, the user of the particularly a kind of GERAN/VAMOS of being applicable to system tries matching method.
Background technology
In recent years, along with the sharp increase of mobile voice service demand, the GSM network has welcome huge development, and limited frequency resource more and more is difficult to satisfy people's conversation needs, especially in the thickly populated city.In addition, be accompanied by the increase of existing GSM network equipment degree of aging, more press for existing GSM network is carried out dilatation.But,,, need more effectively reuse existing hardware resource and frequency resource because the rate of voice service reduce year by year from the angle of operator.Therefore, how on the basis that does not increase the existing system frequency resource, to improve power system capacity, become a very important research direction.
The technology that the multi-user reuses a time slot (MUROS:Multiple User Reuse One Slot) is mainly used in the 3GPP GSM EDGE Radio Access Network (GERAN:GSM/EDGE Radio Access Network).MUROS formally names in the GERAN#40 meeting in November, 2008 into VAMOS (Voice services over Adaptive Multi-user channels on One Slot).
The GERAN/VAMOS system need further improve the speech capacity on the basis of reusing conventional network equipment and Radio Resource.In the feasibility study stage, candidate's VAMOS solution mainly be under the prerequisite that does not reduce speech quality in same time slot multiplexing two or more users.At present, industry is mainly considered is that speech capacity with system improves 2 times, that is: every time slot is reused two users.On the one hand, what be subjected to that this influences is full rate and half rate speech channel, comprise: TCH/FS, TCH/HS, TCH/EFS, TCH/AFS, TCH/AHS and TCH/WFS, and relevant associated control channel, as slow associated control channel (SACCH) and Fast Associated Control Channel (FACCH); On the other hand, after the use VAMOS technology,, certainly will cause co-channel interference and the adjacent increase of disturbing frequently, and cause carrier/interface ratio (C/I) and channeling reduction along with the increase of number of users in the sub-district.Therefore, how, need further research reducing channeling and improving time slot and obtain between reusing compromisely.
Existing VAMOS candidate solutions mainly contains following three kinds:
First kind: be total to Speech frame (Co-TCH) scheme
At down link, linear two-way Guassian Minimum Shift Keying GMSK (GMSK) baseband modulation signal (phase place of this two paths of signals differs pi/2) that merges carries out launching after rf modulations and the power amplification again;
In up link, each travelling carriage (MS) adopts the GMSK modulation respectively, and uses different training sequence (TSC), isolates multiplexing two-way subscriber signal in methods such as base station end use joint-detection.
Second kind: orthogonal sub-channels (OSC) scheme
At down link, adopt quarternary phase-shift keying (QPSK) (QPSK) to come transmitting two paths user's signal, at user's receiving terminal, every road user's signal all can be modulated by GMSK and receive;
In up link, each travelling carriage adopts the GMSK modulation respectively, and uses different training sequences, isolates multiplexing two-way subscriber signal in methods such as base station end use interference eliminated.
The third: self-adaptive symbol constellation mapping (ASC) scheme
At down link, adopt the alpha-QPSK scheme, can regulate the transmitting power that constellation mapping is controlled I road and Q road by self adaptation;
In up link, each travelling carriage adopts the GMSK modulation respectively, and uses different training sequences, uses multi-user-multiple-input and multiple-output (MU-MIMO) receiver to demodulate multiplexing two-way subscriber signal at the base station end.
Although above-mentioned three kinds of schemes are distinct, can regard two subchannels as, subchannel 1 and subchannel 2 are shared identical running time-frequency resource.Usually, the mobile phone that subchannel 1 compatibility is more early stage can only use the mobile phone of supporting the VAMOS technology, hereinafter to be referred as the VAMOS mobile phone on the subchannel 2.
Fig. 1 is the frame structure schematic diagram of existing gsm system.Referring to Fig. 1, gsm system adopts time division multiple access (TDMA) technology, and each tdma frame is divided into 8 time slots, and label is respectively 0,1 ..., 7.No matter frame or time slot all are non-overlapping copies.Time slot (Slot) is a radio resource units basic in the gsm system.According to certain time slot allocation principle, make each travelling carriage can only be in every frame at the time slot of appointment to base station transmit signals, to satisfy regularly and under the synchronous condition, the base station can receive the signal of each travelling carriage respectively and mixed mutually disturbing in each time slot.Simultaneously, the base station is sent to the signal of a plurality of travelling carriages and all arranges in order, transmits in predetermined time slot.Each travelling carriage just can come out the signal distinguishing that sends to it in closing the signal on road as long as receive in the time slot of appointment.
Fig. 2 reuses the schematic diagram of same running time-frequency resource for existing two users of GERAN/VAMOS system.Under circuit switched mode, VAMOS allows multiplexing two users on identical running time-frequency resource, these two users constitute VAMOS pairing (pair), and share identical time slot label, absolute wireless frequency channel label (ARFCN) and tdma frame number at up link and down link.
Fig. 3 is the schematic diagram of pairing user down link modulation in the existing GERAN/VAMOS system.VAMOS subchannel 1 shown in Figure 3 and VAMOS subchannel 2 are respectively the voice service channels (TCH) of two users in certain VAMOS pairing, the bit of VAMOS subchannel 1, VAMOS subchannel 2 and corresponding associated control channel is mapped on a self adaptation QPSK (AQPSK) modulation symbol (Si as shown in the figure), and Si launches after symbol rotation, pulse shaping.At receiving terminal, the bit of one's own TCH channel of user's demodulation and corresponding associated control channel, and do Radio Link and measure.
Fig. 4 is the schematic diagram of pairing user uplink link modulation in the existing GERAN/VAMOS system.In up link, two users that match in the same sub-district adopt GMSK modulation, and send signal on identical running time-frequency resource, that is: these two users have identical time slot label, ARFCN and tdma frame number.Differentiation between the user depends on the difference that the user sends the training sequence in the data.In the same sub-district, the training sequence that user on two subchannels uses different TSC to concentrate, for example: the user on the subchannel 1 use TSC collection 1 (below be designated as: the training sequence TSC set 1), the user on the subchannel 2 use TSC collection 2 (below be designated as: the training sequence TSC set 2).At the base station receiving terminal, adopt Multiuser Detection or interference cancellation techniques demodulation, decipher two users' that receive signal, carry out corresponding Radio Link control at these two users simultaneously.
Though foregoing three kinds of existing VAMOS candidate schemes have guaranteed orthogonality between two multiplexing users at transmitting terminal, but, because the multipath transmisstion characteristic of wireless channel causes intersymbol interference, the nonlinear characteristic of transmitting filter and receiving filter all can cause the leakage signal at two sub-interchannels of receiving terminal in addition.At down link, this means that two multiplexing users interfere with each other, and in up link, the orthogonal property that the random phase official post between the user gets receiving terminal can't guarantee, even if at channel during the decline of time of origin dispersivity.Exactly because can't guarantee the orthogonality of two sub-interchannels at receiving terminal, disturb (intra-cell interference) in the sub-district so produced, two multiplexing subchannels interfere with each other, and cause that systematic function descends.After system was with two users pairing together, because the interference between subchannel, the wireless channel transmission quality that can not guarantee each user was still acceptable, can not recently change user's channel conditions soon by the transmitting power of regulating the pairing user.In this case, be easy to cause conversation loss, cause service quality to reduce.
In view of the foregoing, at present mainly be the selective channel condition is good, signal to noise ratio is high user pairing user as the candidate, increase their transmitting power simultaneously, still have acceptable channel quality in the hope of guaranteeing to match user afterwards.So-called acceptable channel quality promptly according to gsm system, is divided into 8 ranks with user's channel quality, represents different channel qualities respectively.Channel quality is not less than certain rank as thresholding, and promptly can be considered is acceptable channel quality.Nonetheless, still there is very big uncertainty in user's pairing.For example, user's Initial Trans deficiency or transmitting power can not be adjusted to soon keeps satisfied channel conditions, also can cause call drop, perhaps causes returning to time slot of single CU from the VAMOS multiplex mode.
In addition, the annoyance level difference that different user is subjected on diverse location, time slot or frequency is disturbed also difference between the subchannel that is subjected to after user's pairing, and these factors make disturbance regime be difficult to prediction.
In frequency division multiplexing (FDD) system, the channel conditions of up link and down link is different, especially introduce VAMOS multiplexing after, descending employings AQPSK modulation, up continuation adopts GMSK to modulate, and makes the interference difference that the uplink and downlink link is subjected to.In up link, the base station need determine the Initial Trans after the user matches.These have all determined up link and down link all to need to do pressure test.
In sum, before system's decision fits over same running time-frequency resource with two users, need try pairing earlier, promptly allow candidate's two users' travelling carriage send or receive imitated data (dummy data), try pairing in the mode of pressure test, regulate the transmitting power ratio of two users' travelling carriage simultaneously, still have channel transmission quality reliably, thereby reduce cutting off rate in the hope of two users that make pairing.As above, down link can both satisfy two users' of pairing channel transmission quality, then finishes examination pairing process, and two users are multiplexing on same running time-frequency resource, and discharges unnecessary Radio Resource.
A kind of examination matching method common in the prior art is: the base station distributes a time slot to do pressure test for two users of candidate separately.On this time slot, two users' of candidate travelling carriage sends or receives imitated data, and the reporting channel measurement report, and simultaneously, these two original user time slots still continue to keep, as the transmission or the reception of these two actual communicating datas of user.The shortcoming of this method is: not only need an extra time slot to be used for doing pressure test, also require the travelling carriage of candidate user all must support the multi-slot disposal ability, therefore, the range of application of this method in real system is very limited.
Also have a kind of examination matching method in the prior art: the base station is the pressure test time slot with the time slot at the arbitrary user place among two users of candidate.On this time slot, the travelling carriage of candidate user sends or receives imitated data, and the reporting channel measurement report, and another original user time slot still continues to keep, as the transmission or the reception of the actual communicating data of this user.Though this method does not need extra time slot to be used for doing pressure test,, still require the travelling carriage of candidate user to support multi-slot to handle, limited the range of application of this method.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of user to try matching method, supports multi-slot to handle at the travelling carriage that does not need the user, and do not need under the situation of extra slots, realize that the user tries pairing,, and reduce system's cutting off rate with the raising power system capacity.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind of user tries matching method, is applicable to that multiuser multiplexing arrives the speech business VAMOS system of same time slot, sets in advance the condition on opportunity of carrying out pressure test, and this method also comprises:
A, base station selected two users, first user and second user are as candidate user;
B, base station commands second user carry out pressure test at the time slot at the first user place;
C, described carry out pressure test opportunity, condition satisfied the time, second user carries out pressure test at the time slot at the first user place, and to base station reporting channel situation;
D, base station judge according to the channel conditions of first user and second reporting of user whether first user and second user's channel quality reaches the channel quality requirement that sets in advance, if reach, carry out F, otherwise, carry out E;
E, base station are in conjunction with the channel conditions of first user and second reporting of user, and the transmitting power of regulating first user and second user is returned C;
F, base station are multiplexing on same running time-frequency resource with first user and second user, and discharge the running time-frequency resource shared, except that described multiplexing running time-frequency resource by first user and second user.
Preferably, the described condition on opportunity of carrying out pressure test that sets in advance can be in discontinuous emission DTX state and second user does not need to send quiet period indication SID and slow associated control channel SACCH at present frame for: second user.
Preferably, the described condition on opportunity of carrying out pressure test that sets in advance can be the second user applies voice service channel TCH.
Described A can comprise: the base station select at random two users as candidate user or base station according to approaching two users of user's channel quality selective channel quality as candidate user.
Described B can comprise: the base station judges whether selected two users' travelling carriage all supports VAMOS, if, select wherein any one user as second user, otherwise, select not support the pairing user of travelling carriage of VAMOS as second user.
When the condition on opportunity of carrying out pressure test that sets in advance is: during the second user applies TCH, described second user's travelling carriage is supported VAMOS.
Among the described B, the time slot of base station commands second user at the first user place carry out pressure test mode can for: come the order candidate user to carry out pressure test by Assignment Command, and with the time slot and the frequency hop sequences side-play amount MAIO at the first user place, or the time slot at the first user place and absolute wireless frequency channel label ARFCN be carried in the described Assignment Command, notifies the second reporting of user channel conditions simultaneously.
Preferably, can use the combination of channel type in the channel describing message of described Assignment Command and idle bit in the time division multiple access offset domain or idle bit whether to carry out the indication of pressure test as the order candidate user, and with the time slot and the MAIO at the described first user place, or the time slot at the first user place and ARFCN are carried in the described channel describing message in the described Assignment Command.
When the described condition on opportunity of carrying out pressure test that sets in advance is: second user is in DTX state and second user when present frame does not need to send SID and SACCH, and described Assignment Command is carried on and sends to described second user among the Fast Associated Control Channel FACCH;
When the described condition on opportunity of carrying out pressure test that sets in advance is: during the second user applies TCH, described Assignment Command is carried on and sends to described second user among the Separate Dedicated Control Channel SDCCH.
Among the described C, the time slot of second user at the first user place carry out pressure test can for: on the subchannel 2 of second user at the time slot at the first user place, use with the employed training sequence of first user under the training sequence concentrated of the different training sequence of training sequence collection send imitated data or receive imitated data or data are copied in transmitting-receiving.
The described channel quality that sets in advance requires and can reach the channel quality thresholds that sets in advance for the channel conditions that: the channel conditions that the up link of two candidate user and the channel conditions of down link all reach the down link of the channel quality thresholds that sets in advance or two candidate user reaches the up link of the channel quality thresholds that sets in advance or two candidate user.
A kind of user tries matching method, is applicable to that multiuser multiplexing arrives the speech business VAMOS system of same time slot, sets in advance the condition on opportunity of carrying out pressure test, and this method also comprises:
A, base station selected candidate user;
B, base station commands candidate user are carried out pressure test at the time slot at himself place respectively;
C, described carry out pressure test opportunity, condition did not satisfy the time, the base station sends the voice data of described candidate user on the subchannel 1 of each candidate user, send imitated data on subchannel 2; Described carry out pressure test opportunity, condition satisfied the time, the base station all sends imitated data on the subchannel 1 of each candidate user and subchannel 2; Each candidate user receives only the data on the subchannel 1 of himself place time slot, and to base station reporting channel situation;
D, base station judge according to the channel conditions that each candidate user reports whether the channel quality of candidate user reaches the channel quality requirement that sets in advance, if reach, carry out f, otherwise, carry out e;
The transmitting power of the subchannel 1 and the subchannel 2 of each candidate user is regulated according to the channel conditions that each candidate user reports in e, base station, returns c;
It is multiplexing on same running time-frequency resource that f, base station reach the candidate user that the channel quality that sets in advance requires with channel quality, and discharge by described candidate user running time-frequency resource shared, except that described multiplexing running time-frequency resource.
The described condition on opportunity of carrying out pressure test that sets in advance can be in discontinuous emission DTX state and described candidate user does not need to send quiet period indication SID and slow associated control channel SACCH at present frame for: candidate user.
Preferably, among the described a, the quantity of selected candidate user is two: first user and second user;
Described d is: the base station judges according to the channel conditions of first user and second reporting of user whether first user and second user's channel quality reaches the channel quality requirement that sets in advance, if reach, carries out f, otherwise, carry out e;
Described e is: the transmitting power of first user and second user's subchannel 1 and subchannel 2 is regulated in conjunction with the channel conditions of first user and second reporting of user in the base station, returns c;
Described f is: the base station is multiplexing on same running time-frequency resource with first user and second user, and discharges the running time-frequency resource shared, except that described multiplexing running time-frequency resource by first user and second user.
Preferably, among the described a, the quantity of the candidate user of selection is more than two;
Described d is: the base station is according to the channel conditions that each candidate user reports, and judges whether to exist to reach the candidate user that the channel quality that sets in advance requires, if exist, end is to the pressure test of described candidate user, carry out f, otherwise, the candidate user that does not finish pressure test is as yet carried out e;
Described e is: the channel quality itself that the base station reports according to each candidate user, regulate the subchannel 1 of corresponding candidate user and the transmitting power of subchannel 2 respectively, and return c;
Described f is: judge and finished pressure test, and do not finish the channel quality that whether exists in the candidate user of pairing each other as yet and reach two candidate user that the channel quality that sets in advance requires, if exist, described two candidate user are multiplexing on same running time-frequency resource, release is shared by described two candidate user, running time-frequency resource except that described multiplexing running time-frequency resource, end is to the pairing of described two candidate user, and the candidate user that requires of the channel quality that judges whether to exist channel quality not reach as yet and set in advance, if exist, the candidate user that does not finish pressure test is as yet carried out e.
Described a can comprise: the base station select at random the user as candidate user or base station according to the approaching user of user's channel quality selective channel quality as candidate user.
Among the described b, the base station commands candidate user respectively the time slot at himself place carry out pressure test mode can for: use the combination of channel type in the channel describing message of Assignment Command and idle bit in the time division multiple access offset domain or idle bit whether to carry out the indication of pressure test as the order candidate user, come the order candidate user to carry out pressure test and reporting channel situation, and described Assignment Command is carried among the Fast Associated Control Channel FACCH sends to candidate user.
As seen from the above technical solution, user of the present invention tries matching method by setting in advance the condition on opportunity of carrying out pressure test, at the time slot at this candidate user self place or the time slot at other candidate user place carry out pressure test during condition by base station notice candidate user satisfying this opportunity of carrying out pressure test then, and reporting channel situation, at last, regulate the transmitting power of candidate user according to the channel conditions of candidate user by the base station, and when the channel quality of candidate user reaches channel quality and requires, two candidate user are multiplexing on same running time-frequency resource, discharge unnecessary running time-frequency resource.Adopt method provided by the present invention, on the one hand, need not the outer time interval resource of occupying volume, on the other hand, by the condition on opportunity of carrying out pressure test reasonably is set, makes candidate user need not to carry out multi-slot and handle, therefore, the travelling carriage that does not require the user supports multi-slot to handle, and as seen, the present invention supports multi-slot to handle at the travelling carriage that does not need the user, and do not need under the situation of extra slots, realized that the user tries pairing, has improved power system capacity, and has reduced system's cutting off rate.
Description of drawings
Fig. 1 is the frame structure schematic diagram of existing gsm system;
Fig. 2 reuses the schematic diagram of same running time-frequency resource for existing two users of GERAN/VAMOS system;
Fig. 3 is the schematic diagram of pairing user down link modulation in the existing GERAN/VAMOS system;
Fig. 4 is the schematic diagram of pairing user uplink link modulation in the existing GERAN/VAMOS system;
Fig. 5 tries the schematic flow sheet of matching method for the present invention first preferable user;
Fig. 6 tries the schematic flow sheet of matching method for the present invention second preferable user;
Fig. 7 tries the method for matching schematic diagram for the embodiment of the invention one when the user is in the DTX state;
Fig. 8 tries the method for matching schematic diagram for the embodiment of the invention two when user applies TCH voice channel;
Fig. 9 carries out the examination method of matching schematic diagram of pressure test at time slot separately respectively for the embodiment of the invention three candidate user.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.
Main thought of the present invention is: set in advance the condition on opportunity of carrying out pressure test, at the time slot at this candidate user self place or the time slot at other candidate user place carry out pressure test during condition by base station notice candidate user satisfying this opportunity of carrying out pressure test then, and reporting channel situation, at last, regulate the transmitting power of candidate user according to the channel conditions of candidate user by the base station, and when the channel quality of candidate user reaches channel quality and requires, two candidate user are multiplexing on same running time-frequency resource, discharge unnecessary running time-frequency resource.Adopt method provided by the present invention, on the one hand, need not the outer time interval resource of occupying volume, on the other hand, by the condition on opportunity of carrying out pressure test reasonably is set, makes candidate user need not to carry out multi-slot and handle, therefore, the travelling carriage that does not require the user supports multi-slot to handle, and as seen, the present invention supports multi-slot to handle at the travelling carriage that does not need the user, and do not need under the situation of extra slots, realized that the user tries pairing, has improved power system capacity, and has reduced system's cutting off rate.
According to the analysis of present inventor, describe the condition on opportunity of how to select to carry out pressure test in detail below to actual communication process in the mobile communication system.
Studies show that in a communication process, it is in conversation that the mobile subscriber only has time of 40% usually, the most of the time all not have at the transmission speech information.For this reason, gsm system has been introduced the mechanism of discontinuous emission (DTX).
The effect of DTX is:
1, use DTX can reduce the level of interference in the system, and improves system effectiveness;
2, owing to used the DTX transmitter, emission has descended total time, and power loss has prolonged the battery life of travelling carriage when reducing.
In order to realize DTX, use voice activation to detect (VAD) technology, can in time provide indication in case pausing appears in speech.
When the DTX state, travelling carriage only transmits intrinsic SACCH frame and quiet period indication (SID).The SID frame is used for producing " comfort noise ", and this noise is artificial the manufacturing, thereby is clocklike periodic the generation, can not allow the hearer be fed up with when it is decoded.The main purpose of using it is need not transmit under the situation of speech, is necessary for the measurement of satisfying system on the one hand, connects interruption (being call drop) and intentional the generation for the hearer can not thought by mistake on the one hand.The DTX transmission mode only needs very low speed just can solve, and under this pattern, every 480ms just transmits the coding of 260 bits; And under the normal talking state, the every 20ms of speech stream just produces the coding of 260 bits.
In the VAMOS system, the interference between multiplexing two users on same running time-frequency resource has important function to DTX in the sub-district to reducing.At down link, when the TCH channel adopted the DTX technology, concerning a VAMOS pairing, if these two users have data to need to send, when promptly all being in non-DTX state, the AQPSK modulation was adopted in the base station, as shown in Figure 3; If one of them user's TCH channel is in the DTX state, and another user is in non-DTX state, so this moment, the base station will send the user of GMSK modulation signal to non-DTX state; When these two users' TCH channel all was in the DTX state, the base station then only sent DTX information.
Therefore, the present invention proposes: when candidate user is in DTX state and this candidate user and does not need to send SID and SACCH, this candidate user can be carried out pressure test, that is: " candidate user is in the DTX state and this candidate user does not need to send SID and SACCH " can be used as a condition on opportunity of carrying out pressure test.Particularly, can be divided into two kinds of situations again: this candidate user can be carried out pressure test on himself shared time slot, also can carry out pressure test at the time slot at other user place.
In addition, when certain user applies TCH channel, system has finished authentication and the encryption to this candidate user this moment, but, also do not distribute running time-frequency resource for it, this user can utilize the time slot of this time at other user place to carry out pressure test, that is: " candidate user application TCH channel " also can be used as a condition on opportunity of carrying out pressure test.
Based on above-mentioned analysis, the invention provides two kinds of users and try matching method, be elaborated below in conjunction with accompanying drawing.
Fig. 5 tries the schematic flow sheet of matching method for the present invention first preferable user.In this preferred approach, make the time slot of candidate user carry out pressure test at other candidate user place.Referring to Fig. 5, this method is applicable to the GERAN/VAMOS system, and this method comprises:
Step 501: set in advance the condition on opportunity of carrying out pressure test.
According to above-mentioned analysis, the condition on opportunity of carrying out pressure test that sets in advance in this step can be: candidate user is in DTX state and this candidate user does not need to send SID and SACCH (be designated hereinafter simply as first opportunity condition) at present frame, can be yet: during candidate user application TCH channel resource (be designated hereinafter simply as second opportunity condition).
Step 502: base station selected two users, first user and second user are as candidate user.
In this step, the base station can select at random two users as candidate user, also can be according to approaching two users of user's channel quality selective channel quality as candidate user.
If the set condition on opportunity of carrying out pressure test be second opportunity condition, so, must select a voice user and one applying for that the user of TCH channel tries pairing as candidate user in this step.
Step 503: base station commands second user carries out pressure test at the time slot at the first user place.
In this step, corresponding to first opportunity condition, the base station can judge whether selected two users' travelling carriage all supports VAMOS, if, select wherein any one user as second user, otherwise, select not support the pairing user of travelling carriage of VAMOS as second user.
Corresponding to second opportunity condition, voice user as first user, will be applied for that the user of TCH channel is as second user.
In this step, the base station can come order second user to carry out pressure test by Assignment Command (Assignment Command), and with the time slot and the frequency hop sequences side-play amount (MAIO) at the first user place, or the time slot at the first user place and ARFCN are carried among this Assignment Command and send to second user.Here, carry out the time slot of pressure test, that is: the time slot at the first user place must be handed down to second user, issues and ARFCN and MAIO select one.Issuing ARFCN still is whether MAIO adopts the frequency hopping mode to determine according to system, when system adopts frequency hopping, issues MAIO, otherwise issues ARFCN.
When specific implementation, can use the channel of Assignment Command to describe (Channel Description, Channel Description 2 or Channel Description 3) whether the channel type of message and the combination of idle bit in TDMA side-play amount (the channel type and TDMA offset) territory or idle bit carry out the indication of pressure test as the order candidate user, and with the time slot and the MAIO at the first user place, or the time slot at the first user place and ARFCN are carried in the channel describing message in this Assignment Command and send to second user.
Corresponding to first opportunity condition, the base station can be carried on above-mentioned Assignment Command and send to second user in the FACCH channel;
Corresponding to second opportunity condition, the base station can be carried on above-mentioned Assignment Command in the Separate Dedicated Control Channel (SDCCH) and send to second user.
Step 504: when the opportunity of carrying out pressure test, condition satisfied, second user carried out pressure test at the time slot at the first user place, and to base station reporting channel situation.
In this step, first user can not make any change, still on the subchannel 1 of its place time slot with its original training sequence transceive data; And second user is when the opportunity of carrying out pressure test, condition satisfied, on the subchannel 2 of the time slot at the first user place, use with the employed training sequence of first user under the training sequence concentrated of the different training sequence of training sequence collection send imitated data or receive imitated data or data are copied in transmitting-receiving.
Wherein, according to the needs of practical application, if only need carry out pressure test to up link, then second user only sends imitated data on the subchannel 2 of the time slot at the first user place; If only need carry out pressure test to down link, then second user only receives imitated data on the subchannel 2 of the time slot at the first user place; If desired up link and down link are all carried out pressure test, then second user receives and sends imitated data on the subchannel 2 of the time slot at the first user place.
Step 505: the base station judges according to the channel conditions of first user and second reporting of user whether first user and second user's channel quality reaches the channel quality requirement that sets in advance, if reach, and execution in step 507, otherwise, execution in step 506.
Here, can treat with a certain discrimination the channel quality requirement of uplink and downlink link, promptly different channel quality requirements can be set according to the needs of practical application, in the hope of adapting to the needs of practical application more neatly according to the needs of practical application.For example, the channel quality that sets in advance requires: the up link of two candidate user and the channel conditions of down link all reach the channel quality thresholds that sets in advance, perhaps, the channel conditions that can be the down link of two candidate user reaches the channel quality thresholds that sets in advance, perhaps, also can be that the channel conditions of the up link of two candidate user reaches the channel quality thresholds that sets in advance.
The restriction of considering user's pairing in the real system mainly concentrates on down link, can higher channel quality requirement be set for down link, and be the lower channel quality requirement of up link setting, perhaps, consider the complexity of examination pairing process, also can only consider the channel quality requirement of down link.
Step 506: the base station is in conjunction with the channel conditions of first user and second reporting of user, and the transmitting power of regulating first user and second user is returned step 504.
By the judgement of step 505, when also reaching requiring of setting in advance, current channel quality will not carry out this step, and therefore, this step need be returned step 504 after the transmitting power of regulating first user and second user, proceed pressure test.
Step 507: the base station is multiplexing on same running time-frequency resource with first user and second user, and discharges the running time-frequency resource shared, except that described multiplexing running time-frequency resource by first user and second user.
By the judgement of step 505, when reaching requiring of setting in advance, current channel quality represents to try successful matching, and at this moment, the base station is multiplexed into candidate user on the same running time-frequency resource, and discharges unnecessary running time-frequency resource and get final product.
So far, finish the present invention first preferable user and try matching method.
Fig. 6 tries the schematic flow sheet of matching method for the present invention second preferable user.In this preferred approach, make the time slot of candidate user carry out pressure test at himself place.Referring to Fig. 6, this method is applicable to the GERAN/VAMOS system, and this method comprises:
Step 601: set in advance the condition on opportunity of carrying out pressure test.
In this step, the condition of carrying out pressure test that sets in advance is: candidate user is in the DTX state and this candidate user does not need to send SID and SACCH at present frame.
Step 602: base station selected candidate user.
In this step, the base station can select at random candidate user, also can be according to the approaching user of user's channel quality selective channel quality as candidate user.
On the quantity of selected candidate user, there are following two kinds of situations:
First kind of situation: select two candidate user.If only selected two candidate user, expression with these two candidate user as examination pairing object, follow-uply will regulate the transmitting power of these two candidate user, and satisfy the channel quality requirement, together these two users' pairings in conjunction with the channel conditions that these two candidate user report.
Second kind of situation: select plural candidate user.If selected plural candidate user, represent that the pair relationhip between these candidate user is loose relatively, when carrying out transmission power adjustment, only the channel conditions that self is reported according to each candidate user carries out, not necessarily will be with reference to the channel conditions of other candidate user, follow-up will the pairing in twos according to these users' the suitable user of channel conditions selective channel situation.
Step 603: the base station commands candidate user is carried out pressure test at the time slot at himself place respectively.
In this step, whether the base station can carry out the indication of pressure test by the combination of idle bit in Channel Description, the Channel Description 2 of Assignment Command or the channel type and TDMA offset territory in Channel Description 3 message or idle bit as the order candidate user, come the order candidate user to carry out pressure test and reporting channel situation, and this Assignment Command is carried on sends to candidate user among the FACCH.
Step 604: when the opportunity of carrying out pressure test, condition did not satisfy, the base station sent the voice data of this candidate user, sends imitated data on subchannel 2 on the subchannel 1 of each candidate user; When the opportunity of carrying out pressure test, condition satisfied, the base station all sent imitated data on the subchannel 1 of each candidate user and subchannel 2; Each candidate user receives only the data on the subchannel 1 of himself place time slot, and to base station reporting channel situation.
Step 605: the base station judges according to the channel conditions that each candidate user reports whether the channel quality of candidate user reaches the channel quality requirement that sets in advance, if reach, and execution in step 607, otherwise, execution in step 606.
If only selected two candidate user in the step 602, below be designated as first user and second user, so, being treated to of this step: the base station is according to the channel conditions of first user and second reporting of user, whether the channel quality of judging first user and second user reaches the channel quality requirement that sets in advance, if reach, and execution in step 607, otherwise, execution in step 606.
If selected plural candidate user in the step 602, being treated to of this step: the channel conditions that the base station reports according to each candidate user, judge whether to exist and reach the candidate user that the channel quality that sets in advance requires, if exist, end is to the pressure test of this candidate user, execution in step 607, otherwise, to not finishing the candidate user execution in step 606 of pressure test as yet.
Step 606: the transmitting power of the subchannel 1 and the subchannel 2 of each candidate user is regulated according to the channel conditions that each candidate user reports in the base station, returns step 604.
If only selected two candidate user in the step 602, being treated to of this step: the transmitting power of first user and second user's subchannel 1 and subchannel 2 is regulated in conjunction with the channel conditions of first user and second reporting of user in the base station, returns step 604.
If selected plural candidate user in the step 602, being treated to of this step: the channel quality itself that the base station reports according to each candidate user, regulate the subchannel 1 of corresponding candidate user and the transmitting power of subchannel 2 respectively, return step 604.
Step 607: it is multiplexing on same running time-frequency resource that the base station reaches the candidate user that the channel quality that sets in advance requires with channel quality, and discharge by candidate user running time-frequency resource shared, except that multiplexing running time-frequency resource.
If only selected two candidate user in the step 602, being treated to of this step: the base station is multiplexing on same running time-frequency resource with first user and second user, and discharges by first user and second user running time-frequency resource shared, except that multiplexing running time-frequency resource.
If selected plural candidate user in the step 602, being treated to of this step: judge and finished pressure test, and do not finish the channel quality that whether exists in the candidate user of pairing each other as yet and reach two candidate user that the channel quality that sets in advance requires, if exist, these two candidate user are multiplexing on same running time-frequency resource, release is shared by these two candidate user, running time-frequency resource except that multiplexing running time-frequency resource, end is to the pairing of these two candidate user, and the candidate user that requires of the channel quality that judges whether to exist channel quality not reach as yet and set in advance, if exist, to not finishing the candidate user execution in step 606 of pressure test as yet.
So far, finish the present invention second preferable user and try matching method.
By above explanation to technical solution of the present invention as seen, user disclosed by the invention tries matching method by setting in advance the condition on opportunity of carrying out pressure test, at the time slot at this candidate user self place or the time slot at other candidate user place carry out pressure test during condition by base station notice candidate user satisfying this opportunity of carrying out pressure test then, and reporting channel situation, at last, regulate the transmitting power of candidate user according to the channel conditions of candidate user by the base station, and when the channel quality of candidate user reaches channel quality and requires, two candidate user are multiplexing on same running time-frequency resource, discharge unnecessary running time-frequency resource.Adopt method provided by the present invention, on the one hand, need not the outer time interval resource of occupying volume, on the other hand, by the condition on opportunity of carrying out pressure test reasonably is set, makes candidate user need not to carry out multi-slot and handle, therefore, the travelling carriage that does not require the user supports multi-slot to handle, and as seen, the present invention supports multi-slot to handle at the travelling carriage that does not need the user, and do not need under the situation of extra slots, realized that the user tries pairing, has improved power system capacity, and has reduced system's cutting off rate.
Below the present invention is described in detail for three embodiment:
Embodiment one:
Present embodiment provides a kind of method of matching of trying when the user is in the DTX state, this method is applicable to the GERAN/VAMOS system.
Fig. 7 tries the method for matching schematic diagram for the embodiment of the invention one when the user is in the DTX state.Referring to Fig. 7, establishing MS1 and MS2 is voice user, takies TS1 and TS5 respectively.Because the load of system is more and more heavier, the base station need with the local channel situation preferably the user fit on same time slot and the same frequency resource.In order after pairing, not influence user's channel conditions and speech quality as far as possible, need before formal pairing, try pairing, and regulate the transmitting power of two candidate user by the method for carrying out pressure test, make them all have acceptable channel condition in up link and down link.
Because in real system, not all travelling carriage is all supported the multi-slot disposal ability, in order to enlarge the scope of application that the present invention tries matching method, present embodiment proposes: begin to try pairing when DTX state and present frame do not need to send SID and SACCH when a candidate user is in.
The base station is two users of candidate with MS1 and MS2, if two users' of candidate travelling carriage is all supported VAMOS, then the time slot at optional one of them user place is as the pressure test time slot, otherwise the time slot of selecting more early stage mobile phone (that is: legacy user) place is as the pressure test time slot.Below, the time slot of having supposed to select the MS1 place is as the pressure test time slot.The base station sends Assignment Command by FACCH to MS2, and in the channel type of Channel Description message and TDMA offset territory with idle bit 7 (below be designated as: bit 7) as the designator of representing whether to carry out pressure test.For example: during bit7=0, pressure test is not carried out in expression; Bit7=1, expression begins to carry out pressure test.Time slot label, MAIO or ARFCN value used when specifically carrying out pressure test all provide in this message.When MS2 is in DTX state and present frame and does not need to send SID and SACCH, just on the TS1 at MS1 place time slot, send or receive imitated data.
In channel type and TDMA offset territory, bit 6 also is an idle bit, also can be as the designator of pressure test.As bit6=0, then do not carry out pressure test; Bit6=1 begins to carry out pressure test.Certainly, in actual applications, can also combine as the pressure test designator with bit7 and bit6.In addition, can also define the method that idle bit in a variety of Channel of the utilization Description message is done the pressure test designator, too tediously long for fear of the present invention, do not repeat them here, but all within protection scope of the present invention.
At down link, MS1 receives own voice data from TS1, and simultaneously, MS2 receives the imitated data of base station transmission from TS1 when DTX state and present frame do not need to send SID and SACCH.Adopt the descending modulation system of VAMOS, the imitated data of issuing the voice data of MS1 and MS2 are modulated with AQPSK (or AQM, concrete title is also finally determined at present), MS1 and MS2 are subordinated on oneself the subchannel and receive data.Usually, for avoiding extra signaling consumption, MS1 can receive by legacy subchannel mode, and it is not made change, and promptly MS1 uses subchannel 1; MS2 then uses subchannel 2 to receive imitated data, and therefore requiring MS2 must be the VAMOS mobile phone.MS2 judges quality of wireless channel after receiving imitated data, and reports own measurement report about imitated data at the TS1 time slot.The base station all has acceptable channel conditions according to the transmitting power on two subchannels of measurement report adjusting of two users in the hope of making two subchannels.
In up link, MS1 is at the voice data of TS1 transmission oneself, and simultaneously, MS2 also sends the imitated data of GMSK modulation on the TS1 time slot at idle frame.Usually, for not changing the send mode of MS1, the training sequence of MS1 is constant, and MS2 sends imitated data with the training sequence among the corresponding TSC Set2.Two users are being received after the data of TS1 time slot in the base station, judge quality of wireless channel, and regulate the transmitting power of two users on the TS1 time slot in view of the above, all have acceptable channel conditions in the hope of the up link that makes two users.
When the channel conditions of two users' of candidate up link and down link all is can accept the time, the base station just fits over these two users on the TS1, and discharges the original shared time interval resource of MS2, finishes and this time tries the pairing process.Certainly, these two users also can fit on the shared time slot of MS2 or other time slot, discharge unnecessary resource then.
In examination pairing process, the base station also can signaling, allows MS1 send or receive imitated data when DTX state and present frame do not need to send SID and SACCH on the time slot at MS2 place.That is to say, arbitrary candidate user, as long as be in the DTX state, and its present frame just sends or receives imitated data, to improve the efficient of pressure test when not needing to send SID and SACCH on the time slot at another user place.
In examination pairing process, consider complexity, also can only carry out the pressure test of down link, perhaps only carry out the pressure test of up link.When making examination pairing decision, also can only satisfy the channel quality requirement of down link, perhaps only satisfy the channel quality requirement of up link, perhaps satisfy the channel quality requirement of up link and down link simultaneously.
What present embodiment provided tries in the method for matching, because user's travelling carriage only needs deal with data on a time slot, does not support the multi-slot transmittability so require travelling carriage, has enlarged the scope of application of present embodiment method.
The basic thought of above-mentioned present embodiment is: is in the DTX state and when present frame does not need to send SID and SACCH the user, forwards the pressure test time slot to and try pairing, send or receive data at the pressure test time slot, and reporting measurement reports; And, make it maintain acceptable level by the transmitting power that the base station is regulated each subchannel in view of the above; When uplink downlink all had acceptable channel condition, pairing was finished, and discharged unnecessary resource.Thereby, support multi-slot to handle at the travelling carriage that does not need the user, and do not need under the situation of extra slots, realized that the user tries pairing, has improved power system capacity, and has reduced system's cutting off rate.
Except that the mode that the embodiment of the invention one is lifted; can define a variety of pressure tests of when the user is in the DTX state, carrying out based on the main thought of present embodiment; and in Channel Description message, provide the method for pressure test designator; too tediously long for fear of the present invention; do not repeat them here, but all within protection scope of the present invention.
Embodiment two:
Present embodiment provides a kind of and try method of matching when user applies TCH voice channel, and this method is applicable to the GERAN/VAMOS system.
Fig. 8 tries the method for matching schematic diagram for the embodiment of the invention two when user applies TCH voice channel.Referring to Fig. 8, establishing MS1 is voice user, takies the TS1 time slot.Because the load of system is more and more heavier, the base station need with the local channel situation preferably the user fit on same time slot and the same frequency resource.In order after pairing, not influence user's channel conditions and speech quality as far as possible, need before formal pairing, try pairing, and regulate the transmitting power of two candidate user by the method for carrying out pressure test, make them all have acceptable channel condition in up link and down link.
Because in real system, not all terminal is all supported the multi-slot disposal ability, in order to enlarge the scope of application that the present invention tries matching method, present embodiment proposes: the base station just begins to try pairing when the user begins to apply for the TCH channel.If MS2 is applying in the TCH channel procedure, and authentication and encryption have been finished, the base station sends Assignment Command signaling by SDCCH to MS2, and provides time slot label and MAIO value or time slot label and the ARFCN that MS2 can use in Channel Description message.With MS1 and MS2 is two users of candidate, makes MS2 send on the shared TS1 time slot of MS1 or receive copying data.
At down link, MS1 is from the voice data of TS1 reception oneself, and simultaneously, MS2 also receives the imitated data that the base station sends from TS1.Adopt the descending modulation system of VAMOS, the imitated data of issuing the voice data of MS1 and MS2 are modulated with AQPSK (or AQM, concrete title is also finally determined at present), MS1 and MS2 are subordinated on oneself the subchannel and receive data.Usually, for avoiding extra signaling consumption, MS1 can receive by legacy subchannel mode, and it is not made change, and promptly MS1 uses subchannel 1; MS2 then uses subchannel 2 to receive imitated data, and therefore requiring MS2 must be the VAMOS mobile phone.MS2 judges quality of wireless channel after receiving imitated data, and reports own measurement report about imitated data at the TS1 time slot.The base station all has acceptable channel conditions according to the transmitting power on two subchannels of measurement report adjusting of two users in the hope of making two subchannels.
In up link, MS1 is at the voice data of TS1 transmission oneself, and simultaneously, MS2 also sends the imitated data of GMSK modulation on the TS1 time slot.Usually, for not changing the send mode of MS1, the training sequence of MS1 is constant, and MS2 sends imitated data with the training sequence among the corresponding TSC Set2.Two users are being received after the data of TS1 time slot in the base station, judge quality of wireless channel, and regulate the transmitting power of two users on the TS1 time slot in view of the above, all have acceptable channel conditions in the hope of the up link that makes two users.
When the channel conditions of two users' of candidate up link and down link all is can accept the time, the base station just fits over these two users on the TS1, finishes and this time tries the pairing process.Certainly, these two users also can fit over other time slot, discharge unnecessary resource then.
In examination pairing process, the base station can send Assignment Command signaling with the SDCCH channel, whether carries out the designator of pressure test in the channel type of Channel Description message and TDMA offset territory with idle bit 7 conducts.For example bit 7=0 represents not carry out pressure test; Bit 7=1, the pressure test of beginning Jinmen County.Time slot label, MAIO value or ARFCN value used when specifically carrying out pressure test all provide in this message.
In examination pairing process, consider complexity, also can only carry out the pressure test of down link, perhaps only carry out the pressure test of up link.When making examination pairing decision, also can only satisfy the channel quality requirement of down link, perhaps only satisfy the channel quality requirement of up link, perhaps satisfy the channel quality requirement of up link and down link simultaneously.
What present embodiment provided tries in the method for matching, because user's travelling carriage only needs deal with data on a time slot, does not support the multi-slot transmittability so require travelling carriage, has enlarged the scope of application of present embodiment method.
The basic thought of above-mentioned present embodiment is: a voice user and a user who is applying for the TCH channel tried pairing, on the shared time slot of voice user, sends or the reception data, and reporting measurement reports; The transmitting power of each subchannel is regulated in the base station, makes it maintain acceptable level; When uplink downlink all had acceptable channel condition, pairing was finished, and discharged unnecessary resource.Thereby, support multi-slot to handle at the travelling carriage that does not need the user, and do not need under the situation of extra slots, realized that the user tries pairing, has improved power system capacity, and has reduced system's cutting off rate.
Except that the mode that the embodiment of the invention two is lifted; can define a variety of pressure tests of when user applies TCH channel, carrying out based on the main thought of present embodiment; and in Channel Description message, provide the method for pressure test designator; too tediously long for fear of the present invention; do not repeat them here, but all within protection scope of the present invention.
Embodiment three:
Present embodiment provides a kind of candidate user to carry out the examination matching method of pressure test at time slot separately respectively, and this method is applicable to the GERAN/VAMOS system.
Fig. 9 carries out the examination method of matching schematic diagram of pressure test at time slot separately respectively for the embodiment of the invention three candidate user.Referring to Fig. 9, establishing MS1 and MS2 is voice user, takies TS1 and TS5 time slot respectively.
The base station is two users of candidate with MS1 and MS2.The base station sends signaling by FACCH to MS1 and MS2, and uses idle bit 7 conducts whether to carry out the designator of pressure test in the channel type of Channel Description message and TDMAoffset territory.For example: during bit7=0, pressure test is not carried out in expression; Bit7=1, expression begins to carry out pressure test.
The modulation system of AQPSK is adopted in the base station, sends voice data on subchannel 1, sends imitated data on subchannel 2.When the user was in DTX state and present frame and does not need to send SID and SACCH, the AQPSK modulation system was still adopted in the base station, sends imitated data on subchannel 1 and subchannel 2 simultaneously.That is to say: the idle frame the user continues to send imitated data, and the descending so imitated data of GMSK modulation transmission that just need not make into can allow the user also accept pressure test at idle frame, help obtaining the result of examination pairing more accurately.
User 1 and user 2 receive only data on the subchannel 1 at TS1 time slot and TS5 time slot respectively, and the imitated data that send on the subchannel 2 are disregarded.On subchannel 1, what send during non-DTX state is voice data, during the DTX state, and the imitated data of transmission.User 1 and user 2 give the base station according to the data reporting channel situation that is received, and the transmitting power on subchannel 1 and the subchannel 2 is regulated according to user 1 and user's 2 channel conditions in the base station.
If all satisfying certain channel quality, user 1 and user's 2 channel conditions requires (by default), then that they are multiplexing on same running time-frequency resource, and discharge unnecessary Radio Resource.
In examination pairing process, consider complexity, can only carry out the pressure test of down link.
What present embodiment provided tries in the method for matching, because user's travelling carriage only needs deal with data on a time slot, does not support the multi-slot transmittability so require travelling carriage, has enlarged the scope of application of present embodiment method.
The basic thought of above-mentioned present embodiment is: when trying to match, when being in DTX state and present frame and not needing to send SID and SACCH, the user continues to do pressure test at the shared time slot of user oneself, the user receives the imitated data that the base station sends on subchannel 1, and reporting measurement reports; The base station is regulated the transmitting power on subchannel 1 and the subchannel 2 in view of the above, makes it satisfy certain channel quality requirement; When user 1 and user's 2 channel conditions all satisfies certain channel quality and requires, then that they are multiplexing on same running time-frequency resource, finish pairing.Thereby, support multi-slot to handle at the travelling carriage that does not need the user, and do not need under the situation of extra slots, realized that the user tries pairing, has improved power system capacity, and has reduced system's cutting off rate.
Except that the mode that the embodiment of the invention two is lifted; can carry out pressure test at the shared time slot of user based on a variety of when the user is in the DTX state, the continuation of main thought definition of present embodiment; and in Channel Description message, provide the method for pressure test designator; too tediously long for fear of the present invention; do not repeat them here, but all within protection scope of the present invention.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.All any modifications of being done within the spirit and principles in the present invention, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (17)

1. a user tries matching method, is applicable to that multiuser multiplexing arrives the speech business VAMOS system of same time slot, it is characterized in that set in advance the condition on opportunity of carrying out pressure test, this method also comprises:
A, base station selected two users, first user and second user are as candidate user;
B, base station commands second user carry out pressure test at the time slot at the first user place;
C, described carry out pressure test opportunity, condition satisfied the time, second user carries out pressure test at the time slot at the first user place, and to base station reporting channel situation;
D, base station judge according to the channel conditions of first user and second reporting of user whether first user and second user's channel quality reaches the channel quality requirement that sets in advance, if reach, carry out F, otherwise, carry out E;
E, base station are in conjunction with the channel conditions of first user and second reporting of user, and the transmitting power of regulating first user and second user is returned C;
F, base station are multiplexing on same running time-frequency resource with first user and second user, and discharge the running time-frequency resource shared, except that described multiplexing running time-frequency resource by first user and second user.
2. method according to claim 1 is characterized in that:
The described condition on opportunity of carrying out pressure test that sets in advance is: second user is in discontinuous emission DTX state and second user does not need to send quiet period indication SID and slow associated control channel SACCH at present frame.
3. method according to claim 1 is characterized in that:
The described condition on opportunity of carrying out pressure test that sets in advance is: the second user applies voice service channel TCH.
4. according to each described method of claim 1 to 3, it is characterized in that:
Described A comprises: the base station select at random two users as candidate user or base station according to approaching two users of user's channel quality selective channel quality as candidate user.
5. method according to claim 2 is characterized in that:
Described B comprises: the base station judges whether selected two users' travelling carriage all supports VAMOS, if, select wherein any one user as second user, otherwise, select not support the pairing user of travelling carriage of VAMOS as second user.
6. method according to claim 3 is characterized in that:
Described second user's travelling carriage is supported VAMOS.
7. according to each described method of claim 1 to 3, it is characterized in that:
Among the described B, the mode that the time slot of base station commands second user at the first user place carries out pressure test is: come the order candidate user to carry out pressure test by Assignment Command, and with the time slot and the frequency hop sequences side-play amount MAIO at the first user place, or the time slot at the first user place and absolute wireless frequency channel label ARFCN be carried in the described Assignment Command, notifies the second reporting of user channel conditions simultaneously.
8. method according to claim 7 is characterized in that:
Use the combination of channel type in the channel describing message of described Assignment Command and idle bit in the time division multiple access offset domain or idle bit whether to carry out the indication of pressure test as the order candidate user, and with the time slot and the MAIO at the described first user place, or the time slot at the first user place and ARFCN are carried in the described channel describing message in the described Assignment Command.
9. method according to claim 7 is characterized in that:
When the described condition on opportunity of carrying out pressure test that sets in advance is: second user is in DTX state and second user when present frame does not need to send SID and SACCH, and described Assignment Command is carried on and sends to described second user among the Fast Associated Control Channel FACCH;
When the described condition on opportunity of carrying out pressure test that sets in advance is: during the second user applies TCH, described Assignment Command is carried on and sends to described second user among the Separate Dedicated Control Channel SDCCH.
10. according to each described method of claim 1 to 3, it is characterized in that:
Among the described C, the time slot of second user at the first user place carries out pressure test and be: on the subchannel 2 of second user at the time slot at the first user place, the training sequence that the use training sequence different with the training sequence collection under the employed training sequence of first user concentrated sends imitated data or imitated data of reception or the imitated data of transmitting-receiving.
11., it is characterized in that according to each described method of claim 1 to 3:
The channel conditions that the described channel quality that sets in advance requires to reach the up link of the channel quality thresholds that sets in advance or two candidate user for: the channel conditions that the up link of two candidate user and the channel conditions of down link all reach the down link of the channel quality thresholds that sets in advance or two candidate user reaches the channel quality thresholds that sets in advance.
12. a user tries matching method, is applicable to that multiuser multiplexing arrives the speech business VAMOS system of same time slot, it is characterized in that set in advance the condition on opportunity of carrying out pressure test, this method also comprises:
A, base station selected candidate user;
B, base station commands candidate user are carried out pressure test at the time slot at himself place respectively;
C, described carry out pressure test opportunity, condition did not satisfy the time, the base station sends the voice data of described candidate user on the subchannel 1 of each candidate user, send imitated data on subchannel 2; Described carry out pressure test opportunity, condition satisfied the time, the base station all sends imitated data on the subchannel 1 of each candidate user and subchannel 2; Each candidate user receives only the data on the subchannel 1 of himself place time slot, and to base station reporting channel situation;
D, base station judge according to the channel conditions that each candidate user reports whether the channel quality of candidate user reaches the channel quality requirement that sets in advance, if reach, carry out f, otherwise, carry out e;
The transmitting power of the subchannel 1 and the subchannel 2 of each candidate user is regulated according to the channel conditions that each candidate user reports in e, base station, returns c;
It is multiplexing on same running time-frequency resource that f, base station reach the candidate user that the channel quality that sets in advance requires with channel quality, and discharge by described candidate user running time-frequency resource shared, except that described multiplexing running time-frequency resource.
13. method according to claim 12 is characterized in that:
The described condition on opportunity of carrying out pressure test that sets in advance is: candidate user is in discontinuous emission DTX state and described candidate user does not need to send quiet period indication SID and slow associated control channel SACCH at present frame.
14. method according to claim 13 is characterized in that:
Among the described a, the quantity of selected candidate user is two: first user and second user;
Described d is: the base station judges according to the channel conditions of first user and second reporting of user whether first user and second user's channel quality reaches the channel quality requirement that sets in advance, if reach, carries out f, otherwise, carry out e;
Described e is: the transmitting power of first user and second user's subchannel 1 and subchannel 2 is regulated in conjunction with the channel conditions of first user and second reporting of user in the base station, returns c;
Described f is: the base station is multiplexing on same running time-frequency resource with first user and second user, and discharges the running time-frequency resource shared, except that described multiplexing running time-frequency resource by first user and second user.
15. method according to claim 13 is characterized in that:
Among the described a, the quantity of the candidate user of selection is more than two;
Described d is: the base station is according to the channel conditions that each candidate user reports, and judges whether to exist to reach the candidate user that the channel quality that sets in advance requires, if exist, end is to the pressure test of described candidate user, carry out f, otherwise, the candidate user that does not finish pressure test is as yet carried out e;
Described e is: the channel quality itself that the base station reports according to each candidate user, regulate the subchannel 1 of corresponding candidate user and the transmitting power of subchannel 2 respectively, and return c;
Described f is: judge and finished pressure test, and do not finish the channel quality that whether exists in the candidate user of pairing each other as yet and reach two candidate user that the channel quality that sets in advance requires, if exist, described two candidate user are multiplexing on same running time-frequency resource, release is shared by described two candidate user, running time-frequency resource except that described multiplexing running time-frequency resource, end is to the pairing of described two candidate user, and the candidate user that requires of the channel quality that judges whether to exist channel quality not reach as yet and set in advance, if exist, the candidate user that does not finish pressure test is as yet carried out e.
16., it is characterized in that according to each described method of claim 12 to 15:
Described a comprises: the base station select at random the user as candidate user or base station according to the approaching user of user's channel quality selective channel quality as candidate user.
17., it is characterized in that according to each described method of claim 12 to 15:
Among the described b, the base station commands candidate user in the mode that the time slot at himself place carries out pressure test is respectively: use the combination of channel type in the channel describing message of Assignment Command and idle bit in the time division multiple access offset domain or idle bit whether to carry out the indication of pressure test as the order candidate user, come the order candidate user to carry out pressure test and reporting channel situation, and described Assignment Command is carried among the Fast Associated Control Channel FACCH sends to candidate user.
CN200910151443XA 2009-07-17 2009-07-17 Method for trying to pair users Pending CN101959305A (en)

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