CN101662332B - Data transmission method, base station and user terminal - Google Patents
Data transmission method, base station and user terminal Download PDFInfo
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- CN101662332B CN101662332B CN2008101189373A CN200810118937A CN101662332B CN 101662332 B CN101662332 B CN 101662332B CN 2008101189373 A CN2008101189373 A CN 2008101189373A CN 200810118937 A CN200810118937 A CN 200810118937A CN 101662332 B CN101662332 B CN 101662332B
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Abstract
The invention discloses a data transmission method, which comprises the following steps of: judging whether the number of multiplexing users multiplexing the prior time slot is not more than the preset number of bit positions corresponding to a modulating symbol in a high-order modulating mode or not; when the number of multiplexing users is not more than the number of bit positions corresponding to the modulating symbol, mapping the data of each multiplexing user to at least one bit position of the bit positions, wherein each bit position is mapped with and only mapped with the data of one multiplexing user; and sending the data mapped to each bit position at the prior time slot. Correspondingly, the invention also discloses a base station and a user terminal. The data transmission method can realize the multiplexing by different numbers of users at the same time slot in a high-order modulating mode, thereby avoiding switching the modulating mode according to the number of time slot multiplexing users.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to a kind of data transmission method and base station, user terminal.
Background technology
Current global system for mobile communications (GSM; Global System for Mobile Communication)/ enhanced data rates (EDGE that GSM uses; Enhanced Data rates for GSM Evolution) system is that a user monopolizes a time interval resource, for making full use of existing GSM network radio resources, significantly improves the capacity of GSM network; The multi-user is with the multiplexing (MUROS of time slot; Multi-User ReusingOne Slot) technology is fascinating, and the MUROS technology can make two or more users use the data of same time interval resource transmission oneself simultaneously, thereby the capacity of gsm system is doubled and redoubled.
Existing MUROS scheme mainly comprises orthogonal sub-channels (OSC, Orthogonal Sub-Channel) technical scheme [GP-071792] and MUROS high order modulation technical scheme [GP-080295].Descending multi-user multiplexing scheme in the OSC technology is: utilize 8 phase shift keying (8PSK; Phase-Shift-Keying) four points on the planisphere; Constitute QPSK (QPSK, Quadrature Phase Keying) planisphere, multiplexing to realize two users'.Particularly; Base transceiver station (BTS; Base Transceiver Station) transmitter is modulated to the I of QPSK planisphere, Q two-way respectively with two mobile subscribers' of correspondence (MS, Mobile Subscriber) data; When two MS receive the signal that BTS sends, corresponding self that road signal of demodulation respectively; MUROS high order modulation technical scheme is: adopt 16 quadrature amplitude modulation (QAM; Quadrature Amplitude Modulation) high-order modulating; The same time slot of realizing four users is multiplexing, adopts the modulation system of QPSK, realizes that two users' same time slot is multiplexing.Particularly; If exist four users with time slot when multiplexing in the network; BTS is modulated to the data of corresponding four MS respectively on the corresponding bits position of 16QAM planisphere and sends so, when four MS receive the signal that BTS sends, and corresponding self that road signal of demodulation respectively; If exist two users with time slot when multiplexing in the network; BTS is modulated to the data of corresponding two MS respectively the I of QPSK planisphere so; The Q two-way carries out multiplexing transmission, when two MS receive the signal that BTS sends, and corresponding self that road signal of demodulation respectively.
Existing OSC technology has proposed to utilize four points on the 8PSK planisphere to constitute the QPSK planispheres and has realized that multi-user's same time slot is multiplexing, but it can only realize on a physical resource simultaneously that two users' is multiplexing; The MUROS higher order modulation schemes has proposed to utilize high-order modulating (for example 16QAM) to realize that simultaneously four users' co-frequency co-time slot is multiplexing; But this scheme has only in network under the situation of two multiplexing same physical resources of user; Still adopt the modulation system of QPSK; Do not carry out when only carrying a user's information in the same time slot when multiplexing; Network then switches to the modulation system of traditional GMSK Gaussian-filtered minimum shift keying (GMSK, Gaussian-filtered Minimum Shift Keying), therefore adopts existing MUROS high order modulation technical scheme need pass through fast associated control channel (FACCH; Fast AssociatedControl Channel) transmitting control information; So that BTS can be according to the difference of users multiplexing number, correspondence switches to different modulation modes, and this just makes has increased the complexity of network to a certain extent; In addition, use different modulation modes according to the different mining of users multiplexing number, different modulation modes can be supported in the inevitable requirement terminal, has increased the complexity of terminal equipment.
Summary of the invention
The present invention provides a kind of data transmission method, can use a kind of high-order modulating, realizes different number users' same time slot multiplexing transmission.
Accordingly, the present invention also provides a kind of base station and user terminal.
The embodiment of the invention has proposed a kind of data transmission method, comprising: judge the number of the users multiplexing of multiplexing current time slots, whether be not more than the number of the bit position of a modulation symbol correspondence in the preset high-order modulating; When the number of judging users multiplexing is not more than the number of the corresponding bit position of a modulation symbol; On the data map of each users multiplexing at least one bit position in the said bit position, all be mapped with and only be mapped with the data of a users multiplexing on each bit position; The data that are mapped on each bit position are sent in current time slots.
The embodiment of the invention has proposed a kind of base station, comprising: judging unit, be used to judge the number of the users multiplexing of multiplexing current time slots, and whether be not more than in the preset high-order modulating number of the corresponding bit position of modulation symbol; Map unit; Be used for when the number of judging users multiplexing is not more than the number of the corresponding bit position of a modulation symbol; On the data map of each users multiplexing at least one bit position in the said bit position, all be mapped with and only be mapped with the data of a users multiplexing on each bit position; Transmitting element is used for the data that are mapped on each bit position are sent in current time slots.
The embodiment of the invention has proposed a kind of user terminal, comprising: receiving element is used to receive the data of sending based on preset high-order modulating modulation back; Demodulating unit is used for when receiving the data of said transmission, and corresponding to said preset high-order modulating, from least one bit position that is mapped with this user terminal data, demodulation obtains at least one piece of data of this user terminal.
The data transmission scheme that the embodiment of the invention proposes; When being not more than the number of the bit position of a modulation symbol correspondence in the preset high-order modulating through number the timeslot multiplex user; Each user's data of timeslot multiplex is mapped to respectively wherein sends at least one bit position, wherein all be mapped with and only be mapped with the data of a users multiplexing on each bit position, making need be according to the variation of timeslot multiplex number of users; Carry out the switching of modulation system; But adopt a kind of high-order modulating, realize different number users' same time slot multiplexing transmission, thereby reduced the complexity of network; Further, do not need user terminal to support different modulation modes in end side yet.The modulation that network side only needs to carry out data according to preset modulation system is sent, and user terminal also only needs the data that receive to be carried out demodulation, thereby reduced the complexity of terminal equipment corresponding to this preset modulation system.
Description of drawings
Fig. 1 shows the performance difference between different reliability bits position under the 8PSK high order modulation;
Fig. 2 shows the performance difference between different reliability bits position under the 16QAM high order modulation;
Fig. 3 is the planisphere of 16QAM high order modulation;
Fig. 4 shows following four users' of 16QAM modulation system of the embodiment of the invention one proposition timeslot multiplex transmission means;
Fig. 5 shows following three users' of 16QAM modulation system of the embodiment of the invention one proposition timeslot multiplex transmission means;
Fig. 6 shows following two users' of 16QAM modulation system of the embodiment of the invention one proposition timeslot multiplex transmission means;
Fig. 7 shows the next user's of 16QAM modulation system of the embodiment of the invention one proposition timeslot multiplex transmission means;
Fig. 8 is the planisphere of 8PSK high order modulation;
Fig. 9 shows following three users' of 8PSK modulation mode of the embodiment of the invention two propositions timeslot multiplex transmission means;
Figure 10 shows following two users' of 8PSK modulation mode of the embodiment of the invention two propositions timeslot multiplex transmission means;
Figure 11 shows the next user's of 8PSK modulation mode of the embodiment of the invention two propositions timeslot multiplex transmission means;
Figure 12 shows under the 16QAM high order modulation link level performance curve synoptic diagram of 3 users with the time slot multiplexing transmission;
Figure 13 shows at 8PSK and modulates the link level performance curve synoptic diagram of following 3 users with the time slot multiplexing transmission;
Figure 14 is the structural representation of the base station of embodiment of the invention proposition;
Figure 15 is the structural representation of the user terminal of embodiment of the invention proposition.
Embodiment
When the timeslot multiplex scheme that the embodiment of the invention proposes is not more than the number of the corresponding bit position of a modulation symbol for the number in users multiplexing; With sending on the data map of each users multiplexing at least one bit position in the said bit position, all be mapped with and only be mapped with the data of a users multiplexing on each bit position.
Below in conjunction with Figure of description embodiment of the present invention is described.
The high-order modulating of stipulating in the GSM/EDGE system comprises QPSK, 8PSK, and 16QAM and 32QAM etc., the corresponding order of modulation M of these modulation systems is respectively 4,8,16 and 32, and the number of the bit position that each modulation symbol is corresponding is log
2M promptly is respectively 2,3,4 and 5.Define system treats that multiplexing number of users is N, if N≤log
2During M, this N user can carry out multiplexing with time slot, because the corresponding log of each constellation point on the modulation constellation
2Can there be different user data sources M bit position, and promptly possible Data Source number is 1～log
2M.The number that each user can be mapped to the planisphere bit position is K
i, 1≤K wherein
i≤log
2M, i=1 ..., N, and ∑ K
i=log
2M.
Below with N=log
2M and N<log
2Two kinds of situation of M describe respectively:
1, works as N=log
2During M, K
i=1, i=1 wherein ..., N, the i.e. corresponding bit position of user data.
Because in High Order Modulation System, the corresponding a plurality of bit positions of modulation symbol on the planisphere, and exist the difference of reliability between the different bit positions; As depicted in figs. 1 and 2, wherein Fig. 1 is the performance difference between the different bit positions under the 8PSK high order modulation, and abscissa is represented signal to noise ratio; Ordinate is represented the error rate (EBR, Error Bits Rate), and the line of band " * " is represented under the different signal to noise ratios; The average error rate of each bit position, the line of band " O " is represented under the different signal to noise ratios bit position BER (LR that reliability is lower; Low Reliability) the error rate; The line of band "+" identifies under the different signal to noise ratios error rate of the bit position BER (HR, High Reliability) that reliability is higher; Similarly, Fig. 2 is the difference between the different bit positions under the 16QAM high order modulation; Be without loss of generality, the error rate of different bit positions under same signal to noise ratio there are differences under all high order modulation, has the difference of reliability between promptly different bit positions.
Therefore, at N=log
2During M, user data and bit position be correspondence mappings one by one, and it is multiplexing with time slot that system carries out the user according to following process:
(1) select N multiplexing user at the network side of system according to the pairing algorithm, through N the users multiplexing that the pairing algorithm is selected, difference within the acceptable range can to guarantee signal to noise ratio (SNR, Signal Noise Ratio) between this each user;
(2) according to the difference of the channel circumstance of user uplink information acquisition users multiplexing, and according to each user's channel circumstance SNRi, wherein i representes i user, to selecting to treat that a multiplexing N user sorts, and for example establishes SNR1>SNR2>... SNRn;
(3) each user's data is mapped to modulate emission behind the corresponding bit position; The mapping criterion is: the user data that signal to noise ratio is the poorest is mapped on the highly reliable bit position of planisphere; The user data that signal to noise ratio is good is mapped on the low reliable bit positions of planisphere, thereby guarantees the quality of service of all users multiplexing;
(4) after user terminal received all user's data of network side transmission, corresponding to preset high-order modulating, a demodulation is the data on that road to one's name.
2, work as N<log
2During M, there is K
i>1, i=1 wherein ..., the situation of N is worked as K
i>1 o'clock; Mapping mode can be selected multiplexer mode or diversity mode; So-called diversity mode is meant a corresponding user's identical data; Be mapped to respectively and repeat at least two bit positions to send, promptly transmit identical data at least on these two bit positions, this moment, receiving terminal adopted the equal gain combining algorithm to improve the quality of reception; So-called multiplexer mode is meant at least two bit positions, to transmit and belongs to same user's data, but the different bit sequence of transmission on these at least two bit positions improves transmission rate with this.Concrete user is following with the time slot multiplex process:
(1) selects to match algorithm based on certain user, select N=log
2M multiplexing user if one of them user's channel circumstance changes suddenly, exceeds when match the pairing thresholding of algorithm dictates, this user is rejected multipling channel after, N at this moment<log
2M, promptly the multiplexing number of users of time slot is dynamic change;
(2) network side is judged the signal to noise ratio difference of each users multiplexing, the line ordering of going forward side by side equally according to up link transmission information;
(3) each user's data is mapped to modulate emission behind corresponding at least one bit position; The mapping criterion is: the user data that signal to noise ratio is the poorest is mapped on the highly reliable bit position of planisphere; The user data that signal to noise ratio is good is mapped on the low reliable bit positions of planisphere, thereby guarantees the quality of service of all users multiplexing; Simultaneously, owing to there is the mapping of one-to-many, network side carries out branch collection or multiplexing according to channel circumstance and business demand according to different user to the particular user data, transmits same user's data with a plurality of different bit positions; For example whether the quality requirement of network side judges data surpasses preset value; If not, when promptly the communication quality of this user data is relatively poor, adopt diversity mode to send; To on different bit positions, repeat identical data that should the user to transmit, to improve quality of data communication; If when promptly the communication quality of this user data is better, then adopt multiplex mode to send; To after should user's data splitting; In the different data sequence that transmits on the different bit positions after splitting,, improve the throughput of transfer of data with under the prerequisite that guarantees data communication quality.
General if the mode of dividing collection is adopted in speech business, branch collection or multiplexing mode are then adopted in data service;
(4) for the user data terminal of adopting diversity mode when receiving, at first corresponding to preset high-order modulating, demodulation obtains one's own two paths of data at least; Adopt the mode of equal gain combining that the two paths of data at least that this demodulation obtains is merged then.Other user's receive mode is constant.
With two concrete embodiment the present invention program is described below.
Embodiment one:
High-order modulating with 16QAM is that example is explained the present invention program, and the 16QAM planisphere is as shown in Figure 3, and four corresponding bit positions of modulation symbol are followed successively by i in proper order
1, q
1, i
2, q
2, can find out i by Fig. 3
1, q
1The jamming margin of bit position is bigger, and pairing bit position is a high reliability bit positions; And i
2, q
2The jamming margin of bit position is less relatively, is low reliability bits position.
1, when there being four users to carry out with time slot when multiplexing in the system, the downlink quality of supposing these four users is SNRi, and i representes i user, and SNR1; SNR2>SNR3>SNR4 at this moment, confirms mapping treating to set up between multiplexing four user data and four bit positions one to one, and like the two paths of data that channel circumstance is relatively poor: user 3 and user's 4 data are modulated to the i of 16QAM high reliability (HR)
1, q
1The bit position; With channel circumstance two paths of data preferably: user 1 and user's 2 data are modulated to low reliability (LR) the bit position i of 16QAM planisphere
2, q
2, as shown in Figure 4.At this moment, each user should be mapped in two bit positions with uniform reliability on arbitrary bit position, and its mapping mode is not unique, needs base station and terminal to arrange concrete mapping mode through signaling.
2, when there being three users to carry out with time slot when multiplexing in the system, at first the SNRi to three users sorts, and is assumed to be SNR1>SNR2>SNR3, there is this moment a user's data to be mapped to simultaneously on the planisphere on two different bit positions.For example that SNRi is bigger two paths of signals is modulated to the i of 16QAM planisphere
1, q
1The bit position; And the comparatively abominable signal of a path channels environment that will be left is at i
2And q
2Transmit on the bit position, can adopt two kinds of schemes of diversity mode or multiplexer mode, diversity mode is meant that user 3 signal is at i
2And q
2Repeat on the bit position to transmit, i.e. i
2And q
2Transmit identical bit sequence on the bit position, receiving terminal adopts the equal gain combining algorithm to improve the quality of reception; And multiplexer mode is meant i
2And q
2The different bit sequence of transmission on the bit position, but all be to belong to user's 3 pairing business, transmission rate improved.Three user's multiplex modes are as shown in Figure 5, and user 1 and user's 2 data arrange to be mapped to the concrete bit position of high reliability through signaling.
3, when there being two users to carry out with time slot might as well supposing SNR1 when multiplexing in the system; SNR2 treats multiplexing user's number N=log this moment
2M-2, i.e. N<log
2M then have the one-to-many mapping, and the compound mode of mapping is more, as far as user 1, and the bit position number K that it can shine upon
1=1,2,3, the bit position number K that user 2 can be shone upon
2=log
2M-K
1And, work as K
i>1, i=1 can select diversity mode or multiplexer mode at 2 o'clock.K wherein
iConcrete value depend on the requirement of quality of service and power system capacity.Fig. 6 has provided K
i=2, i=1, a kind of multiplex mode of 2 o'clock;
4, when there being 1 user to carry out with time slot when multiplexing in the system, this moment K
i=4, there is 1 pair 4 mapping, can adopt diversity mode or multiplexer mode, as shown in Figure 7.
Embodiment two:
High-order modulating with 8PSK is that example is explained the present invention program, and in 8PSK modulation mode, the number of the bit position of a constellation symbol correspondence is log
2M=3, but therefore the number of users of dynamic multiplexing is 1,2 or 3, a kind of Gray mapped constellation figure of 8PSK is as shown in Figure 8, and wherein the pairing bit position of each modulation symbol is d
1, d
2, d
3, and performance there are differences between different bit positions, d
1The jamming margin of position is less to be low reliability position (LR), and d
2, d
3The position jamming margin bigger, be high reliability position (HR).
1, when there being three users to carry out with time slot when multiplexing in the system, the number of the bit position that multiplexing number of users is corresponding with modulation symbol equates, has the man-to-man mapping of user and bit, might as well suppose SNR1>SNR2>SNR3, mapping scheme is as shown in Figure 9;
2, when there being two users to carry out with time slot establishing SNR1 when multiplexing in the system>SNR2, mapping mode can be shown in figure 10;
3, when there being a user to carry out with time slot when multiplexing in the system, divide collection or multiplexing same user's information on 3 bit positions of 8PSK, the mapping for a pair of three, shown in figure 11.
Based on above-mentioned timeslot multiplex method, 3 users are shown in figure 12 with the link level performance curve of time slot multiplexing transmission under the 16QAM high order modulation.Can find out that by figure user 3 data are divided collection multiplexing back transmission on two low reliability bits positions of the planisphere of 16QAM, obtained obvious performance gain.Compare with 3 users' under the 8PSK modulation multiplexing transmission (performance curve shown in figure 13), its performance is close.
Need to prove that the timeslot multiplex scheme that the embodiment of the invention proposes is not limited to 16QAM, 8PSK modulation mode, it can directly apply to multi-system phase modulated (MPSK), multilevel quadrature Modulation and Amplitude Modulation high order modulation such as (MQAM) (adjustment exponent number M=4; 8,16,32; 64,128 etc.).
The base station that the embodiment of the invention proposes is shown in figure 14, comprising: judging unit 141, be used to judge the number of the users multiplexing of multiplexing current time slots, and whether be not more than in the preset high-order modulating number of the corresponding bit position of modulation symbol; Map unit 142; Be used for when the number of judging users multiplexing is not more than the number of the corresponding bit position of a modulation symbol; On the data map of each users multiplexing at least one bit position in the said bit position, all be mapped with and only be mapped with the data of a users multiplexing on each bit position; Transmitting element 143 is used for the data that are mapped on each bit position are sent in current time slots.
When map unit 142 equals the number of the corresponding bit position of a modulation symbol at the number of users multiplexing, correspondence mappings is one by one carried out in data and each bit position of each users multiplexing.
The user terminal that the embodiment of the invention proposes is shown in figure 15, comprising: receiving element 151 is used to receive the data of sending based on preset high-order modulating modulation back; Demodulating unit 152 is used for when receiving the data of said transmission, and corresponding to said preset high-order modulating, from least one bit position that is mapped with this user terminal data, demodulation obtains at least one piece of data of this user terminal.
This user terminal also comprises merge cells 153, is used for when demodulation obtains the identical data of at least two parts of this user terminal, these at least two parts identical data that demodulation obtains being carried out equal gain combining.
In the data transmission method that the embodiment of the invention proposes; User data is mapped to the locational mode of corresponding modulating sign bit; Can be along with the variation of reusable number of users can be carried out the adjustment of dynamic flexible ground; Thereby can realize carrying out the multiplexing of different user number, with the multiplexing efficient of time slot, improve the multiplexing channel capacity of two users in the prior art with effective raising multi-user with a kind of high-order modulating; Reduce the quantity of the modulation system of supporting at the terminal, thereby reduced the complexity of terminal equipment; Improved in the past and changed the switching complexity that modulation system is brought along with the change of users multiplexing quantity in the high order modulation technology; Quality of service and power system capacity have further been improved.
The data transmission method that adopts the embodiment of the invention to propose; At multiplexing number of users during less than the corresponding bit number of modulation symbol; The user data that channel circumstance is relatively poor divides the collection multiplexing transmission on a plurality of bit positions, thereby can improve the performance of channel circumstance poor user.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (18)
1. a data transmission method is characterized in that, comprising:
Judge the number of the users multiplexing of multiplexing current time slots, whether be not more than the number of the bit position of a modulation symbol correspondence in the preset high-order modulating;
When the number of judging users multiplexing is not more than the number of the corresponding bit position of a modulation symbol; On the data map of each users multiplexing at least one bit position in the said bit position, all be mapped with and only be mapped with the data of a users multiplexing on each bit position;
The data that are mapped on each bit position are sent in current time slots.
2. the method for claim 1; It is characterized in that; When the data map of each users multiplexing is at least one bit position; The channel quality of mapped data respective user on the high bit position of reliability is not higher than the channel quality of mapped data respective user on the low bit position of reliability.
3. according to claim 1 or claim 2 method; It is characterized in that; When the number of users multiplexing equaled the number of the corresponding bit position of a modulation symbol, said data map with each users multiplexing comprised at least one bit position: correspondence mappings is one by one carried out in data and each bit position of each users multiplexing.
4. according to claim 1 or claim 2 method; It is characterized in that; When the number of users multiplexing during less than the number of the corresponding bit position of a modulation symbol, said data map with each users multiplexing comprises at least one bit position: with the data map of at least one users multiplexing to two or more bit positions.
5. method as claimed in claim 4 is characterized in that, the data map of at least one users multiplexing to two or more bit positions, is specifically comprised:
With the data of this users multiplexing, repeating mapping is to said two or more bit positions.
6. method as claimed in claim 4 is characterized in that, the data map of at least one users multiplexing to two or more bit positions, is specifically comprised:
Each bit position in corresponding said two or more bit positions splits into subdata with the data of this users multiplexing;
The every one's share of expenses for a joint undertaking data that split out are mapped to respectively on the corresponding bit position.
7. method as claimed in claim 4 is characterized in that, the data map of at least one users multiplexing to two or more bit positions, is specifically comprised:
Whether the quality requirement of judging these users multiplexing data is higher than threshold value;
For not the time, with the data of this users multiplexing, repeating mapping is to said two or more bit positions in judged result;
When being, each bit position in corresponding said two or more bit positions splits into subdata with the data of this users multiplexing in judged result; And
The every one's share of expenses for a joint undertaking data that split out are mapped to respectively on the corresponding bit position.
8. the method for claim 1; It is characterized in that, also comprise users multiplexing when receiving the data of said transmission, corresponding to said preset high-order modulating; From at least one bit position that is mapped with this user data, demodulation obtains at least one piece of data of this user.
9. method as claimed in claim 8 is characterized in that, when users multiplexing obtains the identical data of at least two parts of this user in demodulation, also comprises, these at least two parts identical data that demodulation obtains are carried out equal gain combining.
10. a base station is characterized in that, comprising:
Judging unit is used to judge the number of the users multiplexing of multiplexing current time slots, whether is not more than in the preset high-order modulating number of the corresponding bit position of modulation symbol;
Map unit; Be used for when the number of judging users multiplexing is not more than the number of the corresponding bit position of a modulation symbol; On the data map of each users multiplexing at least one bit position in the said bit position, all be mapped with and only be mapped with the data of a users multiplexing on each bit position;
Transmitting element is used for the data that are mapped on each bit position are sent in current time slots.
11. base station as claimed in claim 10; It is characterized in that; Said map unit is when the data map of each users multiplexing is at least one bit position; The channel quality of mapped data respective user on the high bit position of reliability is not higher than the channel quality of mapped data respective user on the low bit position of reliability.
12. like claim 10 or 11 described base stations; It is characterized in that; When said map unit equals the number of the corresponding bit position of a modulation symbol at the number of users multiplexing, correspondence mappings is one by one carried out in data and each bit position of each users multiplexing.
13. like claim 10 or 11 described base stations; It is characterized in that; Said map unit is at the number of users multiplexing during less than the number of the corresponding bit position of a modulation symbol, with the data map of at least one users multiplexing to two or more bit positions.
14. base station as claimed in claim 13 is characterized in that, said map unit is with the data of a users multiplexing in said at least one users multiplexing, and repeating mapping is to said two or more bit positions.
15. base station as claimed in claim 13 is characterized in that, said map unit specifically comprises:
Split subelement, be used for each bit position of corresponding said two or more bit positions, the data of a users multiplexing in said at least one users multiplexing are split into subdata;
The mapping subelement is used for the every one's share of expenses for a joint undertaking data that split out are mapped to corresponding bit position respectively.
16. base station as claimed in claim 13 is characterized in that, said map unit specifically comprises:
Judgment sub-unit is used for judging whether the quality requirement of users multiplexing data of said at least one users multiplexing is higher than threshold value;
The repeating mapping subelement is used in judged result for not the time, and with the data of this users multiplexing, repeating mapping is to said two or more bit positions;
Split subelement, be used in judged result when being, each bit position in said two or more bit positions of correspondence splits into subdata with the data of this users multiplexing;
The mapping subelement is used for the every one's share of expenses for a joint undertaking data that split out are mapped to corresponding bit position respectively.
17. a user terminal is characterized in that, comprising:
Receiving element is used to receive the data of sending based on preset high-order modulating modulation back, and said data are:
Judge the number of the users multiplexing of multiplexing current time slots; Whether be not more than the number of the bit position of a modulation symbol correspondence in the preset high-order modulating; And when the number of judging users multiplexing is not more than the number of the corresponding bit position of a modulation symbol; Data with on the data map of each users multiplexing at least one bit position in the said bit position wherein, all are mapped with and only are mapped with the data of a users multiplexing on each bit position;
Demodulating unit is used for when receiving the data of said transmission, and corresponding to said preset high-order modulating, from least one bit position that is mapped with this user terminal data, demodulation obtains at least one piece of data of this user terminal.
18. user terminal as claimed in claim 17 is characterized in that, also comprises merge cells, is used for when demodulation obtains the identical data of at least two parts of this user terminal, these at least two parts identical data that demodulation obtains being carried out equal gain combining.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1337835A (en) * | 2001-09-03 | 2002-02-27 | 信息产业部电信传输研究所 | Dynamic regulation method and device of channel estimation everage region |
| CN1794625A (en) * | 2005-12-26 | 2006-06-28 | 中兴通讯股份有限公司 | Method of implementing HSDPA in time division synchronous (CDMA) system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1337835A (en) * | 2001-09-03 | 2002-02-27 | 信息产业部电信传输研究所 | Dynamic regulation method and device of channel estimation everage region |
| CN1794625A (en) * | 2005-12-26 | 2006-06-28 | 中兴通讯股份有限公司 | Method of implementing HSDPA in time division synchronous (CDMA) system |
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