CN102694638B - Transmission method and transmission device of downlink multiframe - Google Patents
Transmission method and transmission device of downlink multiframe Download PDFInfo
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Abstract
The invention discloses a transmission method and a transmission device of a downlink multiframe, wherein the method comprises the following steps of: setting the positions of slow associated control channel (SACCH) frames and traffic channel (TCH) frames of a plurality of users in the multiframe, and multiplexing the SACCH frame of each user and the TCH frame of other user in the same time slot of the multiframe under a half-rate channel; and sending the multiframe at a preset time slot. Obviously, through adjusting the positions of the SACCH frame and the TCH frame of the multiplexing user, the SACCH frame of the user and the TCH frame of the other user are subjected to multiplexing transmission, that is, the SACCH frame of each user is sent in a staggered way, and the influence on a voice is also reduced as much as possible while the normal transmission of the channel associated signaling of each user is guaranteed.
Description
Technical field
The present invention relates to mobile communication technology field, relate in particular to a kind of transmission method and device of downlink multiframes.
Background technology
Along with the continuous increase of number of users, the pressure in the voice capacity in mobile communication system grows with each passing day, this situation in populous area or country performance particularly evident.Along with the development of technology, competition is more fierce simultaneously, and the charge of voice service is in continuous reduction, and operation commercial city, facing to the pressure of cost, need to more effectively utilize hardware and frequency spectrum resource.
Traditional voice is that user of a time slot allocation uses.If want, increase voice capacity, in identical resource, carry the more voice of multichannel, can adopt MUROS (Multi-User Reuse One Slot, multiuser time slot multiplexing) implementation method, be at a time slot and ARFCN (Absolute Radio Frequency Channel Number, absolute rf channel number) upper multiplexing a plurality of users just can obtain the remarkable increase of capacity like this on fixing carrier frequency and frequency spectrum.
As shown in Figure 1, be MUROS scheme schematic diagram, MUROS scheme can provide two sub-channels, and two MS (Mobile Station, travelling carriage) are worked on identical Radio Resource.Each MS takies a sub-channels, and subchannel is distinguished by the training sequence of quadrature or nearly orthogonal.For traditional C/S (Circuit Switching, circuit switching) speech business, each pulse (Burst) is given a MS and is used, and GMSK (Gaussian Minimum Shift Keying, GMSK (Guassian Minimum Shift Keying)) modulation system is all used in up-downgoing.At up direction, base station sends two-way GMSK signal and produces class QPSK (Quadrature Phase-Shift Keying, Quadrature Phase Shift Keying) signal, receiving terminal is by mutually orthogonal training sequence and the interference cancellation techniques of enhancing, the channel that does not belong to self is used as to interference signal and eliminates, thereby solve, belong to self Yi road signal.At up direction, two multiplexing MS are still used GMSK to be modulated at same time slot and send, the mode demodulation two-way multiplexed signals of SIC (Successive Interface Cancellation) or JD (Joint Detection) is used in base station, and distinguish two users by different TSC (Training Sequence Code, training sequence code).
Each TDMA (Time Division Multiple Access, time division multiple access access) frame comprises 8 basic time slots (slot), each time slot is exactly a basic physical channel, each time slot comprises 156.25 code elements, is exactly 156.25 bits for normal burst pulse train.A plurality of tdma frames form multi-frame, when some different logic channels are multiplexed into a physical channel, need to utilize these multi-frames, the multiframe period that wherein comprises 26 frames is 120ms not, for Traffic Channel and SACCH (Slow Associated Control Channel thereof, slow associated control channel), so-called SACCH refers to (the Traffic Channel with TCH, Traffic Channel) with the control channel at a slow speed on road, it is transmitted in some signalings at a slow speed in communication process, as Timing Advance, power control etc.Wherein 24 burst sequences are for business, and 2 burst sequences are for signaling.
For a user uses a full speed channel, as shown in Figure 2, it is TCH frame that frame number 0～11,13～24 amounts to 24 frames to 26 multi-frame structure schematic diagrames, in figure, with T, represents; The frame of frame number 12 is SACCH frame, in figure, with A, represents; The frame of frame number 25 is idle (IDLE) frame, in figure, with I, represents.
For two users use respectively two half-rate channels, 26 multi-frame structure schematic diagrames are shown in Figure 3, and it is TCH frame that frame number 0～11,13～24 amounts to 24 frames, and frame number 12 and 25 frame are SACCH frame, and two SACCH frames are used to respectively two users.In Fig. 3, T1 is user 1 TCH frame, and T2 is user 2 TCH frame, and A1 is user 1 SACCH frame, and A2 is user 2 SACCH frame.
Yet, the inventor finds in realizing process of the present invention, multiplexing 2 users on a half-rate channel, while being equivalent on a full speed channel multiplexing 4 users, the position of only having two SACCH frames in 26 multi-frames, use to 4 users' SACCH, therefore, according to the transmission plan of existing downlink multiframes, cannot meet the requirement of descending SACCH frame transmission.
Summary of the invention
The invention provides a kind of transmission method and device of downlink multiframes, to solve existing scheme, under half-rate channel, carry out the problem that MUROS can not meet SACCH frame transmission requirement when multiplexing.
For this reason, the embodiment of the present invention adopts following technical scheme:
A kind of transmission method of downlink multiframes, when the multiplexing half-rate channel of a plurality of users, comprise: the position of slow associated control channel SACCH frame and the Traffic Channel TCH frame of a plurality of users in multi-frame is set, by the same time slot of other users' the multiplexing multi-frame under half-rate channel of TCH frame in each user's SACCH frame and described a plurality of user; At preset time slot, send described multi-frame.
A kind of device of controlling downlink multiframes transmission, when the multiplexing half-rate channel of a plurality of users, comprise: multi-frame setting unit, for the position of a plurality of users' of multi-frame slow associated control channel SACCH frame and Traffic Channel TCH frame is set, by the same time slot of other users' the multiplexing multi-frame under half-rate channel of TCH frame in each user's SACCH frame and described a plurality of user; Multi-frame transmitting element, for sending described multi-frame at preset time slot.
Receive a subscriber equipment for downlink multiframes, when the multiplexing half-rate channel of a plurality of users, comprising: multi-frame receiving element, for receiving described multi-frame at preset time slot; Multi-frame resolution unit, obtains slow associated control channel SACCH frame and the Traffic Channel TCH frame of described subscriber equipment for resolving described multi-frame, wherein, and the multiplexing same time slot at the multi-frame under half-rate channel of the TCH frame of this SACCH frame and other subscriber equipmenies.
Visible, by user's SACCH frame and other users' TCH frame is carried out to multiplexing transmission, i.e. each user's the SACCH frame transmission of staggering, when having guaranteed each user's the normal transmission of channel associated signalling, has also reduced the impact for voice as far as possible.
Accompanying drawing explanation
Fig. 1 is prior art MUROS scheme schematic diagram;
26 multi-frame structure schematic diagrames when Fig. 2 is the alone family use of prior art full speed channel;
Fig. 3 is two users of prior art, 26 multi-frame structure schematic diagrames while using half-rate channel respectively;
Fig. 4 is the transmission method flow chart of downlink multiframes of the present invention;
Fig. 5 is transmission method embodiment mono-schematic diagram of downlink multiframes of the present invention;
Fig. 6 is transmission method embodiment bis-schematic diagrames of downlink multiframes of the present invention;
Fig. 7 is the apparatus structure schematic diagram that the present invention controls downlink multiframes transmission;
Fig. 8 is the user device architecture schematic diagram that the present invention receives downlink multiframes.
Embodiment
The embodiment of the present invention is by the scheme of 26 new multi-frame transmission of design, solve when on a half-rate channel multiplexing a plurality of (for example, 2) user, while being equivalent on a full speed channel multiplexing 4 users, in 26 multi-frames, need descending SACCH frame to 4 users to use and the not enough problem of SACCH frame that causes.
Referring to Fig. 4, the transmission method flow chart for embodiment of the present invention downlink multiframes, comprising:
S401: the position of SACCH frame and the TCH frame of a plurality of users in multi-frame is set, by the same time slot of each user's SACCH frame and other users' the multiplexing multi-frame under half-rate channel of TCH frame;
S402: send described multi-frame at preset time slot.
Visible, by by user and the SACCH frame of the users multiplexing transmission of staggering with it, when having guaranteed each user's the normal transmission of channel associated signalling, also reduced as far as possible the impact for voice.
In addition, when described SACCH frame and TCH frame multiplexing transmission, can send respectively described SACCH frame and TCH frame with different transmission power.
Preferably, the transmitting power that SACCH frame is set is greater than the transmitting power of the TCH frame multiplexing with it.SACCH frame is launched with relatively high power, can be guaranteed the correct reception of SACCH frame signaling.
Below in conjunction with multi-frame structure figure, the embodiment of the present invention is described in detail.
Paper embodiment mono-.
Suppose that multiplexing user is MS1, MS3 on a half-rate channel, on another half-rate channel, multiplexing user is MS2, MS4, on a full speed channel, has 4 users multiplexing.
Referring to Fig. 5, it is embodiment mono-schematic diagram.Wherein, T1 represents the TCH frame of MS1, and T2 represents the TCH frame of MS2, the TCH frame that T3 represents MS3, and T4 represents the TCH frame of MS4, and in like manner, A1 represents the SACCH frame of MS1, and A2 represents the SACCH frame of MS2, the SACCH frame that A3 represents MS3, and A4 represents the SACCH frame of MS4.
Visible, the SACCH frame of MS1 still adopts on the frame of frame number 12 and transmits, on the frame that is simultaneously 6 by the SACCH frame of MS3 at frame number, transmit, be the SACCH frame of MS1 and the TCH frame of MS3 multiplexing transmission on the frame of frame number 12, now, also can arrange between the SACCH frame of MS1 and the TCH frame of MS3 and keep certain power bias, preferably, the SACCH frame that sends MS1 is used larger transmitting power, to guarantee the correct reception of the signaling of SACCH frame.In like manner, for frame 6, the SACCH frame of MS3 and the TCH frame of MS1 multiplexing transmission on the frame of frame number 6, now between the SACCH frame of MS3 and the TCH frame of MS1, keep certain power bias, preferably, the SACCH frame that sends MS3 is used larger transmitting power, to guarantee the correct reception of the signaling of SACCH frame.
In like manner, for the SACCH frame of MS2, still at frame 25, send, the SACCH frame of MS4 sends at frame 19 simultaneously.
It should be noted that, in Fig. 5, select frame 6 as A3, frame 19 as A4, with uniform transmission SACCH frame, but be only an example, also can select all the other frames as SACCH frame, as long as guarantee the transmission of staggering of each user SACCH frame.The multiplexing transmission of SACCH frame and TCH frame, while transmitting by relatively high power for the correct transmission of assurance SACCH frame, for TCH frame, can produce certain impact, may also exert an influence to the adjacent TCH frame of this TCH frame simultaneously, when we stagger each user SACCH frame transmission, allow the location comparison of SACCH frame evenly can allow all affected TCH frames separately, further reduced the impact for voice, can not cause because of the stack of impact the further decline of voice quality.
The embodiment of the present invention has proposed the scheme of 26 new multi-frame transmission, make on half-rate channel multiplexing a plurality of (for example, 2) transmission of staggering of user's SACCH frame, thereby realized the problem that cannot guarantee 4 descending SACCH frame transmission of user when 4 multiplexing two half-rate channels of user, when guaranteeing the transmission of SACCH frame, also reduced as far as possible the impact for voice.
Introduce embodiment bis-below.
Suppose that multiplexing user is MS1, MS3 on a half-rate channel, on another half-rate channel, multiplexing user is MS2, MS4, on a full speed channel, has 4 users multiplexing.
Referring to Fig. 6, be embodiment bis-schematic diagrames.Wherein, T1 represents the TCH frame of MS1, and T2 represents the TCH frame of MS2, the TCH frame that T3 represents MS3, and T4 represents the TCH frame of MS4, and in like manner, A1 represents the SACCH frame of MS1, and A2 represents the SACCH frame of MS2, the SACCH frame that A3 represents MS3, and A4 represents the SACCH frame of MS4.
Now the SACCH frame of MS1 still can send at frame 12, and the SACCH frame of MS3 sends at frame 6 simultaneously.For frame 12, the SACCH frame of MS1 and the TCH frame of MS3 multiplexing transmission on the frame of frame number 12, preferred, between the SACCH frame of MS1 and the TCH frame of MS3, keep certain power bias, the SACCH frame of MS1 is used relatively high power to send, and guarantees the correct reception of the signaling of SACCH frame.In like manner for frame 6, the SACCH frame of MS3 and the TCH frame of MS1 multiplexing transmission on the frame of frame number 6, preferred, between the SACCH frame of MS3 and the TCH frame of MS1, keep certain power bias, the SACCH frame of MS3 is used relatively high power to send, and guarantees the correct reception of the signaling of SACCH frame.
The SACCH frame of MS2 is sent at frame 25, the SACCH frame of MS4 is sent at frame 18 simultaneously.
Be different from embodiment mono-, embodiment bis-has adjusted each user SACCH frame and TCH frame position, and:
(1) the TCH frame of MS1 is multiplexing with the TCH frame of MS3 regularly, the TCH frame of MS2 is multiplexing with the TCH frame of MS4 regularly, also, guarantee that users multiplexing is constant in whole multi-frame.
Specifically, referring to Fig. 6, compare with Fig. 5, by adjusting the transmission location of the TCH frame of MS3 and MS4, TCH frame multiplexing together with the TCH of MS3 frame, MS2 is multiplexing together with the TCH of MS4 frame all the time all the time to have guaranteed the TCH frame of MS1.The benefit of doing is like this to have improved the stability of users multiplexing.And/or
(2) all users' SACCH frame is multiplexed into all users' TCH frame, that is, makes SACCH frame arrive each user to the interference equalization of TCH frame.
Because certain user SACCH frame in scheme will carry out multiplexing transmission with another user's TCH frame, and the transmitting power of SACCH frame can be larger, therefore the TCH frame for multiplexing position will have certain interference, therefore in embodiment bis-, by adjusting TCH frame and the SACCH frame position of MS3 and MS4,4 SACCH frames are multiplexing with 4 users' TCH frame respectively.
In embodiment mono-, A1 and T4 are multiplexing, A2 and T4 is multiplexing, A3 and T1 is multiplexing, A4 and T1 multiplexing, so SACCH frame only has interference to the TCH frame of MS1 and MS4.In embodiment bis-, A1 and T3 are multiplexing, A2 and T4 is multiplexing, A3 and T1 is multiplexing, A4 and T2 multiplexing, make 4 SACCH frames to 4 users' TCH frame, have interference respectively.Visible, compare with embodiment mono-, embodiment bis-has avoided 4 SACCH frames in embodiment mono-only 2 users' TCH frame to be had to interference, makes interference more balanced, will further reduce the impact on voice.
The technical scheme of the embodiment of the present invention goes for multiplexing a plurality of users on a half-rate channel.Above-described embodiment is all with multiplexing 2 users on a half-rate channel, or multiplexing 4 users are the technical scheme of the example elaboration embodiment of the present invention on a full speed channel, on a half-rate channel, multiplexing a plurality of users' technical scheme and multiplexing 2 users' scheme are similar, repeat no more.Multiplexing a plurality of users on same time slot, are about to the SACCH frame of different user in different timeslot multiplex transmission, to guarantee the transmission SACCH frame that staggers, have also reduced as far as possible the impact for voice when can guarantee the transmission of SACCH frame.
Corresponding with said method, the embodiment of the present invention also provides a kind of device of controlling downlink multiframes transmission, be used for realizing MUROS under half-rate channel, this device specifically can refer to base station equipment, also can refer to the functional entity that is positioned at base station equipment inside, can realize by software, hardware or software and hardware combining mode.
Participate in Fig. 7, for controlling downlink multiframes transmitting device internal structure schematic diagram, this device comprises multi-frame setting unit 701 and multi-frame transmitting element 702, wherein:
Multi-frame setting unit 701, for the position of a plurality of users' of multi-frame SACCH frame and TCH frame is set, wherein, by the same time slot of each user's SACCH frame and other users' the multiplexing multi-frame under half-rate channel of TCH frame;
Multi-frame transmitting element 702, for sending described multi-frame at preset time slot.
Preferably, this device also comprises:
Transmitting power control unit 703, is greater than the transmitting power of its multiplexing TCH frame for controlling the emission rate of SACCH frame.
Further, as described a plurality of users, take 2 users during as example, this device also can comprise:
Static multiplex control unit 704, for adjusting each user SACCH frame and TCH frame position, the TCH frame of first user is multiplexing with the second user TCH frame regularly.
Or this device also can comprise:
Balanced control unit 705, for adjusting each user SACCH frame and TCH frame position, is multiplexed into all SACCH frames all users' TCH frame.
It should be noted that, concrete use procedure and the preceding method embodiment of the device of control downlink multiframes transmission are substantially similar, repeat no more herein.
In addition, the embodiment of the present invention also provides a kind of device that receives downlink multiframes, and this device specifically can refer to subscriber equipment, also can refer to the functional entity that is positioned at subscriber equipment inside, can realize by software, hardware or software and hardware combining mode.
Referring to Fig. 8, for receiving the internal structure schematic diagram of downlink multiframes device, it comprises multi-frame receiving element 801 and SACCH frame acquiring unit 802, wherein:
Multi-frame receiving element 801, for receiving described multi-frame at preset time slot;
Multi-frame resolution unit 802, obtains SACCH frame and the TCH frame of described subscriber equipment for resolving described multi-frame, wherein, and the same time slot of the multiplexing multi-frame under half-rate channel of TCH frame of this SACCH frame and other subscriber equipmenies.
Visible by above-described embodiment, by user's SACCH frame and other users' TCH frame is carried out to multiplexing transmission, be the transmission of staggering of each user's SACCH frame, when having guaranteed each user's the normal transmission of channel associated signalling, also reduced as far as possible the impact for voice.
Preferably, when the SACCH frame by two users and TCH frame multiplexing transmission, guarantee certain power bias, SACCH frame is launched with relatively high power, guarantee the correct reception of SACCH frame signaling.
In addition, by the TCH frame of first user is multiplexing with the second user TCH frame regularly, guaranteed that users multiplexing is constant in whole multi-frame, improved the stability of users multiplexing.
And, by all SACCH frames being multiplexed into all users' TCH frame, also making SACCH frame arrive each user to the interference equalization of TCH frame, thereby reduced and the multiplexing impact on voice of SACCH frame.
One of ordinary skill in the art will appreciate that, the process that realizes the technical scheme of above-described embodiment can complete by the relevant hardware of program command, described program can be stored in read/write memory medium, and this program is carried out the corresponding step in said method when carrying out.Described storage medium can be as: ROM/RAM, magnetic disc, CD etc.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (13)
1. a transmission method for downlink multiframes, when the multiplexing half-rate channel of a plurality of users, is characterized in that, comprising:
The position of slow associated control channel SACCH frame and the Traffic Channel TCH frame of a plurality of users in multi-frame is set, by the same time slot of other users' the multiplexing multi-frame under half-rate channel of TCH frame in each user's SACCH frame and described a plurality of user;
Different time-gap transmission by the SACCH frame of the different user in described a plurality of users at described multi-frame.
2. method according to claim 1, is characterized in that, also comprises:
When described SACCH frame and TCH frame multiplexing transmission, with different transmission power, send respectively described SACCH frame and TCH frame.
3. method according to claim 2, is characterized in that, the transmitting power of described SACCH frame is greater than the transmitting power of the TCH frame multiplexing with it.
4. method according to claim 1, it is characterized in that, described a plurality of user comprises two users, is respectively first user and the second user, the SACCH frame of described first user and described the second user's TCH frame multiplexing No. 12 frames or No. 25 frames at described multi-frame.
5. method according to claim 4, is characterized in that, also comprises:
Adjust each user SACCH frame and TCH frame position, the TCH frame of first user is multiplexing with the second user's TCH frame regularly.
6. according to method described in claim 1,2,3 or 4, it is characterized in that, also comprise:
Adjust each user SACCH frame and TCH frame position, each user's SACCH frame is multiplexing with the TCH frame of different user respectively, make SACCH frame arrive each user to the interference equalization of TCH frame.
7. method according to claim 1, is characterized in that, described a plurality of users comprise four users, is respectively first user, the second user, the 3rd user and four-function family.
8. method according to claim 7, is characterized in that, adjusts each user SACCH frame and TCH frame position, and the TCH frame of first user is multiplexing with the 3rd user's TCH frame regularly; The second user's TCH frame is multiplexing with the TCH frame at four-function family regularly.
9. a device of controlling downlink multiframes transmission, when the multiplexing half-rate channel of a plurality of users, is characterized in that, comprising:
Multi-frame setting unit, for the position of a plurality of users' of multi-frame slow associated control channel SACCH frame and Traffic Channel TCH frame is set, and by the same time slot of other users' the multiplexing multi-frame under half-rate channel of TCH frame in each user's SACCH frame and described a plurality of user;
Multi-frame transmitting element, for the different time-gap transmission at described multi-frame by the SACCH frame of described a plurality of users' different user.
10. install according to claim 9, it is characterized in that, also comprise:
Transmitting power control unit, is greater than the transmitting power of the TCH frame multiplexing with it for controlling the transmitting power of SACCH frame.
11. according to device described in claim 9 or 10, it is characterized in that, described a plurality of user comprises two users, be respectively described in first user and the second user multi-frame setting unit by the SACCH frame of described first user and described the second user's TCH frame multiplexing No. 12 frames or No. 25 frames at described multi-frame.
12. according to device described in claim 9 or 10, it is characterized in that, also comprises:
Balanced control unit, for adjusting each user SACCH frame and TCH frame position, all users' SACCH frame and all users' TCH frame is multiplexing.
13. according to device described in claim 9 or 10, it is characterized in that, described device is base station equipment or is the functional entity that is arranged in base station equipment.
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| US20080159246A1 (en) * | 2006-12-29 | 2008-07-03 | Kari Niemela | Data transmission in mobile communication system |
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| FR2724509A1 (en) * | 1994-09-12 | 1996-03-15 | Alcatel Mobile Comm France | Cellular radio communication system e.g. for GSM system |
| US20080159246A1 (en) * | 2006-12-29 | 2008-07-03 | Kari Niemela | Data transmission in mobile communication system |
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