CN101399597A - Method and device for sending special burst frame - Google Patents
Method and device for sending special burst frame Download PDFInfo
- Publication number
- CN101399597A CN101399597A CNA2007101752458A CN200710175245A CN101399597A CN 101399597 A CN101399597 A CN 101399597A CN A2007101752458 A CNA2007101752458 A CN A2007101752458A CN 200710175245 A CN200710175245 A CN 200710175245A CN 101399597 A CN101399597 A CN 101399597A
- Authority
- CN
- China
- Prior art keywords
- physical channel
- frame
- spreading factor
- special burst
- uplink physical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The embodiment of the invention discloses a method for transmitting a special burst frame. The method comprises the following steps: after the last data frame of the service is transmitted, a spreading factor of the original uplink physical channel of the last data frame of the service currently transmitted is obtained; when the obtained spreading factor equals 16, the current original uplink physical channel is used for continuously transmitting special burst frames; when the obtained spreading factor is unequal to 16, a variable spreading method is adopted to obtain a uplink physical channel with the spreading factor being 16 from the original uplink physical channel, and the obtained uplink physical channel is used for continuously transmitting the special burst frames. The embodiment of the invention further discloses a device for transmitting the special burst frames, and the device comprises a judging module, a spreading module and a transmitting module. By the method and the device, a mobile terminal can always continuously transmit the SB (special burst) frames by the SF (spreading factor) 16 physical channel, which effectively reduces the interference on the uplink channel in the system and makes up the disadvantages of the original method.
Description
Technical field
The present invention relates to mobile communication technology, refer in particular to a kind of method and device that sends special burst frame.
Background technology
In order to improve the resource utilization of system, at TD SDMA (TD-SCDMA, TimeDivision Synchronous Code Division Multiple Access) used discontinuous transmission (DTX, Discontinuous Transmission) technology in the system.After using this technology, the wireless transmitter of the UE side of base station of network side (NodeB) and travelling carriage is not when high level has transfer of data, to open or close transmitter power in adaptive mode, discontinuous transmission special burst (SB, Special Burst) frame, to keep communication link, it can not interrupted.Because after using the DTX technology, the SB frame is to send discontinuous intermittence, therefore can reduce the interference power level on up accordingly or the down direction, but also can prolong the service time of the battery of the hand-held travelling carriage of user.For the convenience of describing, we can represent the up DTX technology of network side with ULDTX; And represent the descending DTX technology of mobile station side with DL DTX.
At present, had some TD-SCDMA equipment manufacturers to realize the DTX technology respectively, and expection can reduce the interference of uplink and downlink, the network performance of raising TD-SCDMA system by use DTX technology at mobile station side and network side.But because the DTX technology can be brought certain negative effect to technology such as power control and intelligent antenna figurations, so up to the present, the DTX technology is not used widely.The negative effect that the DTX technology is caused mainly contains several aspects as described below:
1), for UL DTX owing to send the SB frame discontinuously, will make smart antenna can't obtain continuous up-converter channel impact responding, thereby the uplink/downlink antenna figuration is caused negative effect at up channel.
2), UL/DL DTX all can have bigger negative effect to the inner-loop power control between base station and the travelling carriage.Reason is, during discontinuous transmission, the SB frame that carries the TPC command word that local terminal sent is discontinuous transmission, thereby make regulating the speed of opposite end transmitting power reduced greatly, very difficult quick decline of resisting wireless channel effectively descends thereby make local terminal accept the opposite end quality of data.
3), during UL/DL DTX, the transmitting power of SB frame is not had good power control scheme.The 3GPP agreement stipulates that up SB transmitting power can use the mode of open loop power control to adjust; And for down channel, also can with reference in the 3GPP agreement to the mode that up channel adopted, promptly also use the mode of open loop power control to adjust; In addition, also have some manufacturers to adopt the fixedly method of SB frame transmitting power at down channel, the transmitting power when this SB frame transmitting power equals to send data for the last time adds the certain power deviant.But the accuracy of two kinds of power control modes of above-mentioned this is all relatively poor, and if SB frame transmitting power excessive, then can impact other users; And SB frame transmitting power is too small, can't guarantee that the entrained through-put power of SB frame control (TPC) command word correctly accepted by the opposite end, thereby cause TPC command word demodulation mistake, brings worse influence to systematic function.
4), owing to also carried simultaneous bias (SS) command word in the SB frame, therefore, will bring negative effect synchronously to interframe if it is long to send the intermittence of SB frame.
Owing to consider the negative effect that above-mentioned DTX technology is brought, so at present in actual applications, generally all be to adopt the mode that sends the SB frame continuously in the uplink and downlink direction.Specifically, for down channel, generally will distribute 2 or 2 above spreading factors (SF) at least according to service rate is that 16 physical channel (abbreviating the SF16 physical channel as) transmits data; And when high level does not have transfer of data, will only use one of them SF16 physical channel to send the SB frame continuously, other physical channels do not send data.And when being changed into first SB frame of transmission by transfer of data, the transmitting power of first SB frame equals the transmitting power of last Frame.After this, use inner-loop power control that the transmitting power of SB frame is controlled.Because in above-mentioned method, all portability TPC and SS command word in each SB frame, and described SB frame only need use a SF16 physical channel to send, therefore when high level does not have transfer of data, with the interference that reduces greatly down channel.
For up channel, owing to, in the TD-SCDMA system,, generally all be to distribute the less physical channel of SF value to carry out transfer of data for a uplink service in order in up channel, to implement joint-detection better.For example, professional for the adaptive multi-rate (AMR) of 12.2k, only for it has distributed a SF8 physical channel, then will distribute the physical channel of a SF2 at up direction for the business of the 64k speed of up direction.At this moment, at up direction, will use the less physical channel of SF value that is disposed to send the SB frame continuously.
Easy for what describe, we can be referred to as former method with the scheme of above-described continuous transmission SB.We can understand the performance of above-mentioned former method by emulated data as described in Table 1.
Table 1
Table 1 is depicted as at the 3km of International Telecommunication Union 50% load (load), the simulation result under the scene of AMR 12.2k.Wherein, NO DTX is the former method of above-mentioned continuous transmission SB frame; For UL DTX, the transmitting power of its SB frame is used the open loop power control method; And for DL DTX, the transmitting power of its SB frame is used the closed-loop power control mode.In addition, the CSR in the table 1 is a call successful rate; HOSR is a handover success rate; CDR is a cutting off rate; ULUSR is up satisfaction; DLUSR is descending satisfaction; OLPC is an external circule power control; PwMargin is a power bias; SBGP is that special burst generates period; SBSP is special burst scheduling period.
According to the data shown in the table 1 as can be known, because the channel circumstance of 3Km scene is better, even therefore use NO DTX method also can obtain satisfactory performance.And used after the DTX, most performance index more or less decrease on the contrary, and visible DTX technology can play negative interaction on the contrary for some scene.Though and up channel has been avoided the negative effect that DTX introduced by continuous transmission SB frame, but because at up direction, in most cases be to use the less physical channel of SF value to send the SB frame, therefore, even when high level does not send data, because the transmitting power of SB frame is bigger, therefore the interference to up channel does not significantly reduce.
Summary of the invention
In view of this, the main purpose of the embodiment of the invention is to provide a kind of method and device of the SB of transmission frame, thereby when up direction sends the SB frame continuously, reduces the interference to up channel.
For achieving the above object, the technical scheme in the embodiment of the invention is achieved in that
A kind of method that sends special burst frame, this method comprises:
After sending last Frame of this business, obtain the spreading factor of former uplink physical channel of last Frame of current this business of transmission;
When the spreading factor that is obtained equals 16, use current original uplink physical channel to send special burst frame continuously;
When the spreading factor that is obtained was not equal to 16, using the variable spread spectrum method to obtain a spreading factor from former uplink physical channel was 16 uplink physical channel, and the uplink physical channel that re-uses described acquisition sends special burst frame continuously.
A kind of device that sends special burst frame, this device comprises: judge module, spread spectrum module and sending module;
Described judge module is used to judge whether the spreading factor of former uplink physical channel of last Frame of this business of transmission that is obtained equals 16, and judged result is sent to spread spectrum module;
Described spread spectrum module is used for determining setting to the original physical channel according to the judged result that receives: when judged result is a spreading factor when equaling 16, the original physical channel is not provided with, the original physical channel is exported to sending module; When judged result is a spreading factor when being not equal to 16, then use the variable spread spectrum method from former uplink physical channel, to obtain a uplink physical channel that spreading factor equals 16, the physical channel of described acquisition is exported to sending module;
Described sending module is used to use received physical channel to send special burst frame continuously.
A kind of method and device of the SB of transmission frame are provided in the embodiments of the invention in summary.By the method and apparatus that embodiments of the invention provided, can make portable terminal when high level does not have data to send, even at the SF of uplink physical channel is 1,2,4 or 8 o'clock, also can use one of them uplink physical channel, send the SB frame continuously with maximum spreading factor SF (equaling 16), thereby to the interference of up channel, remedy the existing defective of former method in the reduction system effectively.
Description of drawings
Fig. 1 is the flow chart that sends the method for SB frame in the embodiment of the invention.
Fig. 2 is the schematic representation of apparatus that sends the SB frame in the embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention express clearlyer, the present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
Fig. 1 is the flow chart that sends the method for SB frame in the embodiment of the invention.As shown in Figure 1, the method for transmission SB frame comprises step as described below in the embodiment of the invention:
Specifically, can in last Frame that is sent, add a flag bit, according to this flag bit as can be known this Frame be last Frame of required transmission in this business.Portable terminal knows that according to the flag bit of above-mentioned Frame this Frame has been after last Frame of this business, obtains the spreading factor SF of current up channel.
In this step, the transmitting power P of first SB frame
STransmitting power P with last Frame
DDifference equal former uplink physical channel spreading gain G
OWith the uplink physical channel spreading gain G that passes through after being provided with
SDifference, i.e. P
S=P
D-(G
S-G
O).After this, the transmitting power of the SB frame of described uplink physical channel can use inner-loop power control to control.
In addition, in step 103 and step 104, if when this portable terminal has been assigned with many physical channels, will only use a certain physical channel wherein to send the SB frame, other physical channel send any data.
In addition, in an embodiment of the present invention, to use terrestrial radio Access Network (UTRAN) end of supporting up channel variable spread spectrum method of the prior art at receiving terminal, thereby make and correctly to receive by the SB frame that physical channel sent behind the variable spread spectrum at receiving terminal.
By using variable spread spectrum method as mentioned above, can under any channel condition, all use the SF16 physical channel to send the SB frame, obtain bigger spreading gain with this, reduce the SB transmitting power, and the signal interference ratio that can keep receiving terminal, thereby reach the purpose that reduces the interference between the up channel by the transmitting power of SB frame in the reduction up channel.
For example, for the AMR business, suppose to have distributed at up direction the physical channel of a SF8, suppose that quiet period is 0.5, the gain that this moment, this scheme was brought is so:
10*1g(1*2/(0.5*2+0.5*1)＝1.25dB
That is the gain of 1.25db, is all arranged for the uplink and downlink direction.
And switch (PS) business for data field, particularly for the WWW business of interactive class, because up data are less, the user generally is in read period, therefore can suppose that up link (UL) activity factor is 0.2, suppose this moment uplink service speed be 64K (at this moment, SF=2), if can support the variable spread spectrum of up channel, promptly when sending the SB frame, can use the SF16 physical channel to send, then the gain of UL is at this moment:
10*1g(1*8/(0.2*8+0.8*1))＝5.23db
Above gain is to give no thought to power control, for the theoretical value that the sole user calculated.In actual conditions, after the interference of the whole network reduced, power control will be worked rapidly, thereby further reduced the transmitting power (no matter it is to send the SB frame or sending Frame) of other portable terminals.And because the power reduction, continuous and will cause the overall interference of system further to reduce, finally reach balance, therefore the gain that is brought will be higher by the qualitative gain that calculates than above-mentioned, thereby can obviously improve the Key Performance Indicator (KPI) and the quality of services for users (QoS) of system, as shown in the table.
| Scenarios | CSR | HOSR | CDR | ULUSR | DLUSR |
| Former method | 97.48％ | 98.53％ | 0.16％ | 97.99％ | 98.51％ |
| Method of the present invention | 99.30％ | 99.1％ | 0.08％ | 99.96％ | 98.57％ |
Table 2
As shown in table 2, from simulation result as seen, the method that is proposed in the embodiment of the invention is with respect to former method, and is apparent in view to the reduction of uplink interference, for KPI raising arranged all, is greatly increased for up satisfaction (ULUSR) when special.
Fig. 2 is the schematic representation of apparatus that sends the SB frame in the embodiment of the invention, and as shown in Figure 2, the device 200 that sends the SB frame in the embodiment of the invention comprises: judge module 201, spread spectrum module 201 and sending module 203.
Described judge module 201 is used to judge whether the SF of the former uplink physical channel that is obtained equals 16, and judged result is sent to spread spectrum module 202;
Described spread spectrum module 202 is used for determining whether that according to the judged result that receives needs are provided with the original physical channel; That is, when judged result is SF=16, the original physical channel is not provided with, the original physical channel is exported to sending module 203; When judged result is SF ≠ 16, then use the variable spread spectrum method from former uplink physical channel, to obtain the uplink physical channel of a SF=16, the physical channel of described acquisition is exported to sending module 203;
Described sending module 203 is used to use received physical channel to send the SB frame continuously.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1, a kind of method that sends special burst frame is characterized in that, this method comprises:
After sending last Frame of this business, obtain the spreading factor of former uplink physical channel of last Frame of current this business of transmission;
When the spreading factor that is obtained equals 16, use current original uplink physical channel to send special burst frame continuously;
When the spreading factor that is obtained was not equal to 16, using the variable spread spectrum method to obtain a spreading factor from former uplink physical channel was 16 uplink physical channel, and the uplink physical channel that re-uses described acquisition sends special burst frame continuously.
2, method according to claim 1 is characterized in that, this method also comprises:
When the spreading factor that is obtained equaled 16, the transmitting power of described first special burst frame was identical with the transmitting power of described last Frame.
3, method according to claim 1 is characterized in that, this method also comprises:
When the spreading factor that is obtained is not equal to 16, the transmitting power P of described first special burst frame
STransmitting power P with last Frame
DDifference equal described former uplink physical channel spreading gain G
OWith the physical channel spreading gain G after described the setting
SDifference.
4, according to claim 2 or 3 described methods, it is characterized in that this method also comprises:
The transmitting power of non-first special burst frame uses inner-loop power control to control.
5, a kind of device that sends special burst frame is characterized in that, this device comprises: judge module, spread spectrum module and sending module;
Described judge module is used to judge whether the spreading factor of former uplink physical channel of last Frame of this business of transmission that is obtained equals 16, and judged result is sent to spread spectrum module;
Described spread spectrum module is used for determining setting to the original physical channel according to the judged result that receives: when judged result is a spreading factor when equaling 16, the original physical channel is not provided with, the original physical channel is exported to sending module; When judged result is a spreading factor when being not equal to 16, then use the variable spread spectrum method from former uplink physical channel, to obtain a uplink physical channel that spreading factor equals 16, the physical channel of described acquisition is exported to sending module;
Described sending module is used to use received physical channel to send special burst frame continuously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101752458A CN101399597B (en) | 2007-09-27 | 2007-09-27 | Method and device for sending special burst frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101752458A CN101399597B (en) | 2007-09-27 | 2007-09-27 | Method and device for sending special burst frame |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101399597A true CN101399597A (en) | 2009-04-01 |
| CN101399597B CN101399597B (en) | 2012-06-27 |
Family
ID=40517889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101752458A Expired - Fee Related CN101399597B (en) | 2007-09-27 | 2007-09-27 | Method and device for sending special burst frame |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101399597B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102740435A (en) * | 2011-04-02 | 2012-10-17 | 中兴通讯股份有限公司 | Method and terminal for calculating transmission power of special burst |
| CN102916725A (en) * | 2011-08-03 | 2013-02-06 | 中兴通讯股份有限公司 | Method, terminal and base station for transmitting special burst |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001072080A1 (en) * | 2000-03-23 | 2001-09-27 | Siemens Information And Communication Networks S.P.A. | Access channel scheduling in a radio communication system |
| EP1223776A1 (en) * | 2001-01-12 | 2002-07-17 | Siemens Information and Communication Networks S.p.A. | A collision free access scheduling in cellular TDMA-CDMA networks |
| US7529220B2 (en) * | 2002-07-31 | 2009-05-05 | Interdigital Technology Corporation | Wireless receiver |
-
2007
- 2007-09-27 CN CN2007101752458A patent/CN101399597B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102740435A (en) * | 2011-04-02 | 2012-10-17 | 中兴通讯股份有限公司 | Method and terminal for calculating transmission power of special burst |
| CN102740435B (en) * | 2011-04-02 | 2017-06-13 | 中兴通讯股份有限公司 | A kind of method and terminal of the transmission power for calculating special burst |
| CN102916725A (en) * | 2011-08-03 | 2013-02-06 | 中兴通讯股份有限公司 | Method, terminal and base station for transmitting special burst |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101399597B (en) | 2012-06-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7801547B2 (en) | System and method for determining downlink signaling power in a radio communication network | |
| US7444162B2 (en) | Apparatus and a method for distributing a transmission power in a cellular communications network | |
| US8130694B2 (en) | Method for controlling transmission power of HS-SCCH in UMTS system | |
| CN100559734C (en) | Adjust the transmitting power and the corresponding mobile communication network of forward access channel | |
| CN101841893B (en) | Apparatus and method for communicating user equipment specific information in cellular communication system | |
| CN1316833C (en) | Method of controlling HS-SCCH power in mobile communicating system | |
| US8055291B2 (en) | Power-aware link adaptation in a wideband CDMA system | |
| CN100499391C (en) | Method for updating high-speed shared information channel power controlling parameter | |
| CN100407827C (en) | Method of physical radio channel power control | |
| US20070161394A1 (en) | Transport format combination selecting method, wireless communication system, and mobile station | |
| US20060268789A1 (en) | Radio resource control in HSUPA system | |
| US20050043052A1 (en) | Method of operation of a communication device and corresponding communication device | |
| CN101426224A (en) | Method, system and equipment for measurement result reporting | |
| CN101064538B (en) | Power control method for time-division synchronous CDMA communication system | |
| JP4053004B2 (en) | DSCH power control method | |
| CN101242203A (en) | A method and device for realizing power control of control channel | |
| US20070105593A1 (en) | Equalizing signal-to-interference ratios of different physical channels supporting a coded composite transport channel | |
| US8606283B2 (en) | Signalling gain factors in a communication network system | |
| CN100471083C (en) | Method for carrying out power control on forward access channel | |
| EP1886417A1 (en) | Method of estimating a current channel condition in a wireless communications network | |
| CN101222253B (en) | Opened loop power control method | |
| CN100563118C (en) | Soft handover downlink power control system and method thereof | |
| CN102014454A (en) | Method of radio communication, mobile terminal, and radio network control apparatus | |
| CN101399597B (en) | Method and device for sending special burst frame | |
| CN1859029B (en) | Self adaptive power control method for up-high speed special physical control channel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120627 Termination date: 20160927 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |