CN102149121B - Discontinuous transmission method for user terminal detection and user terminal in TD-SCDMA (Division-Synchronization Code Division Multiple Access) system - Google Patents
Discontinuous transmission method for user terminal detection and user terminal in TD-SCDMA (Division-Synchronization Code Division Multiple Access) system Download PDFInfo
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Abstract
The invention relates to a discontinuous transmission method for user terminal detection and a user terminal in a TD-SCDMA (Division-Synchronization Code Division Multiple Access) system. The method comprises the following steps that: a downlink control module receives a TFCI (Transport Format Combination Indicator) value sent by a downlink transmission business receiver module; the downlink control module judges whether the TFCI value is 0 or an effective value; if the TFCI value is 0 or an effective value, the SIR (Signal to Interference Ratio) value of a business time slot, which is calculated and sent by a joint detection module, is received; and the downlink control module determines to detect the state of the current discontinuous transmission (DTX) of the terminal according to the TFCI value and the SIR value. In the method and the user terminal, the SIR value detection and the TFCI value detection are combined to determine the DTX state so as to more truly reflect the signal quality of the current UE and improve the accuracy of the DTX detection. The user terminal has the advantages of simple structure, lower complexity and stable performance and is easy to realize.
Description
Technical field
The present invention relates to communication technical field, specifically in TD-SCDMA (TimeDivision-Synchronous Code Division Multiple Access, TD SDMA) system, user terminal detects method and the user terminal that downlink discontinuous launches the operating state of (DTX).
Background technology
Regulation in the Uu interface physical layer technical requirement standard " 3GPP TS 25.224Physical layer procedures (physical layer procedure) " of TD-SCDMA communication system, at physical channel S-CCPCH (Secondary Common Control Physical Channel), UL DPCH (uplink special physical channel), DL DPCH (downward special physical channel), PUSCH (Physical Uplink Shared Channel) and PDSCH (Physical Downlink Shared Channel) can apply DTX (Discontinuous Transmission, discontinuous transmission).
After wireless link gets up, when up (forward link) or descending (reverse link) does not have data to send, physical layer uses DTX periodically to insert SB (Special Burst, special burst) reduce delivery flow rate without data segment, thus reach the interference reducing network, improve power system capacity, and reduce the object of terminal transmit power.
Physical layer is at CCTrCH (Coded Composite Transport Channel, Coded Combined Transport Channel) on do not receive the data block that high level will transmit, so SB will be sent at the first frame of this transmission intercal, and if channel does not have high level data block issue, physical layer periodically will send SB always.Once there be high level data block to issue, physical layer will stop DTX immediately and issue normal data block.In downstream, DTX state be base station according to physical layer data flow process, determine a period of time send or do not send signal.During not sending signal, need periodically to send the control procedure that special burst SB maintains downlink receiver.
The feature of DTX state and descending SB pattern description:
Can support that the business of DTX mode of operation has: S-CCPCH, UL DPCH, DL DPCH, PUSCH and PDSCH, during DTX, periodically send SB, and the time slot format of SB is identical with business, there is power also identical with business, and the minimum number road of the physical resource only configured at this CCTrCH sends.
Descending SB first radio frames that business stops just starting send, that is, DTX start always with the SB of a radio frames be mark.The end of DTX does not indicate, can be stopped at any time by data.
The cycle that descending SB sends is SBSP (Special Burst Scheduling Parameter, descending special burst dispatching cycle), is configured by upper strata, general SBSP=4, that is, every 4 DTX radio frames, always send SB in the radio frames started; SB information bit is the such special sequence of 0101....SB can carry SS (Synchronous Shift, simultaneous bias), TPC (TransmitPower Control, transmitting power controls) and TFCI (Transport Format Combination Indicator, transformat combination indicates) bit.When SB time slot exists TFCI, so TFCI should be 0.
UE (User Equipment, user terminal) can judge according to the data received that whether net side is at transmission SB, thus judge currently whether be in DTX state, because the detection of SB information bit 0101... is comparatively complicated, not easily realize, so changing TFCI when utilizing SB to send into is that 0 this feature is to detect SB.But under the wireless environment of complexity, owing to being subject to the impact of channel disturbance, this detection is sometimes very inaccurate.The method that SIR (Signal to Interference Ratio, signal interference ratio) and TFCI value therefore can be adopted to detect combine to confirm SB, thus reaches the object detecting DTX state.
TFCI information describes current transformat combination, for notifying the TFC (transformat combination) of the current activation of recipient, the physical layer of recipient can be determined accordingly how to the decoding data received, demultiplexing and with which type of TF, the TBS received is delivered to MAC (Media Access Control, medium access control) sublayer.For each user, TFCI information will send once in every 10ms radio frames.TFCI symbol after coding is in subframe and be all equally distributed in data block.TFCI bit number is variable, and it is when calling out beginning, is configured by high-level signaling.SIR is defined as: SIR=RSCP*SF/Interference.Wherein, RSCP is the received signal code power on DPCH or the PDSCH time slot of specifying, and Interference is the indelible Received signal strength interference of receiver in same time slot, and SF is the spreading factor used.The calculating of SIR is generally calculated by channel impulse response, i.e. this user of SIR=single-code channel received signal power/this community ISCP (not being multiplied by SF again, is because midamble code not spread spectrum).Wherein, this user single-code channel received signal power uses the first window accumulated signal energy on average to obtain by this user; ISCP (Interference Signal Code Power in this manual, refers to this community ISCP) is calculated by the noise tap in channel impulse response.
The value of SIR can react the signal quality of current UE more really.The TFCI=0 (as met a certain threshold requirement, being assumed to be Qin) when sir value is higher and calculating can think believable, can be used as the foundation that DTX state detects; And when sir value is less, the TFCI=0 calculated should think incredible, the foundation that can not detect as DTX state, and the high-low threshold of sir value needs setting in advance.
Summary of the invention
Main purpose of the present invention is to provide method and the user terminal that terminal in a kind of TD-SCDMA system of simple possible detects descending DTX operating state, solve the problem that in prior art, implementation procedure is complicated and difficulty is high, and improve the accuracy of DTX state detection.
The technical solution adopted for the present invention to solve the technical problems is:
In a kind of TD-SCDMA system, user terminal detects discontinuous transmission method, and it comprises:
Down link control module receives the transformat combination instruction TFCI value that downlink transfer business receiver module sends over;
Described down link control module judges that whether described TFCI value is 0 or effective value, if 0 or effective value then receive joint-detection module calculated and the business time-slot signal interference ratio sir value sended over;
Described down link control module determines the state-detection of carrying out the current discontinuous transmission DTX of terminal according to described TFCI value and described sir value.
Preferably, described down link control module receives the transformat combination instruction TFCI value that downlink transfer business receiver module sends over; , comprise further: described down link control module configure dedicated transmission channel DCH channel coefficients, sends to downlink transfer business receiver module by described DCH channel coefficients before;
Described downlink transfer business receiver module obtains the TFCI value of Coded Combined Transport Channel according to described DCH channel coefficients, and described TFCI value is sent to described down link control module.
Preferably, described DCH channel coefficients comprises: DCH working frequency points, timeslot number, activationary time, Coded Combined Transport Channel information (type, number etc.) and transport format combination information (number, form).
Preferably, the process of described joint-detection module computing service time slot signal interference ratio sir value specifically comprises:
Obtain the DCH channel coefficients after this community noise reduction, activated code channel situation and Interference Signal Code Power ISCP, calculate described sir value according to described DCH channel coefficients, activated code channel situation and Interference Signal Code Power ISCP according to formula (1),
SIR (db)=10*log 10 (RSCP/ (ISCP*ActCodeNum))+SF correction factor (db)
Wherein,
RSCP is the received signal code power of DCH, and ISCP is Interference Signal Code Power, and ActCodeNum is the activated code channel situation in certain estimating window, and SF correction factor is the corrected value provided according to different spreading factor situation.
Preferably, describedly determine the state-detection of carrying out the current discontinuous transmission DTX of terminal according to described TFCI value and described sir value, specifically comprise:
If TFCI value is 0 and sir value is greater than certain threshold Qin, then thinking current is DTX state;
If TFCI value is non-zero effective value and sir value is greater than thresholding Qin, then thinking current is non-DTX state.
The present invention also provides a kind of user terminal, and it comprises:
Downlink transfer business receiver module, for sending TFCI value to down link control module;
Joint-detection module, for calculating and sending business time-slot sir value to down link control module;
Down link control module, for receiving the TFCI value that downlink transfer business receiver module sends over, judge that whether described TFCI value is 0 or effective value, if 0 or effective value then receive joint-detection module calculated and the business time-slot sir value sended over, and determine the state-detection of carrying out the current discontinuous transmission DTX of terminal according to described TFCI value and described sir value.
Preferably, described down link control module, also for configure dedicated transmission channel DCH channel coefficients, sends to downlink transfer business receiver module by described DCH channel coefficients;
Described downlink transfer business receiver module, also for obtaining the TFCI value of Coded Combined Transport Channel according to described DCH channel coefficients, and sends described TFCI value to described down link control module.
Preferably, described DCH channel coefficients comprises: DCH working frequency points, timeslot number, activationary time, Coded Combined Transport Channel information (type, number etc.) and transport format combination information (number, form).
Preferably, described joint-detection module, for obtaining DCH channel coefficients, activated code channel situation and Interference Signal Code Power ISCP after this community noise reduction, calculate described sir value according to described DCH channel coefficients, activated code channel situation and Interference Signal Code Power ISCP according to formula (1)
SIR (db)=10*log10 (RSCP/ (ISCP*ActCodeNum))+SF correction factor (db)
Wherein,
RSCP is the received signal code power of DCH, and ISCP is Interference Signal Code Power, and ActCodeNum is the activated code channel situation in certain estimating window, and SF correction factor is the corrected value provided according to different spreading factor situation.
Preferably, described down link control module, for judging and confirming:
If TFCI value is 0 and sir value is greater than certain threshold Qin, then thinking current is DTX state;
If TFCI value is non-zero effective value and sir value is greater than thresholding Qin, then thinking current is non-DTX state.
Implement technical scheme of the present invention, there is following beneficial effect: in TD-SCDMA system provided by the invention, terminal detects method and the user terminal of descending DTX operating state, detect by sir value and TFCI value the method combined and confirm DTX state, the signal quality of current UE can be reacted more really, improve the accuracy that DTX detects, and simple structure and lower complexity, stable performance, is easy to realize.
Accompanying drawing explanation
The method flow diagram that Fig. 1 provides for the embodiment of the present invention;
Another flow chart of method that Fig. 2 provides for the embodiment of the present invention;
The structural representation of the user terminal that Fig. 3 provides for the embodiment of the present invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The embodiment of the present invention provides user terminal in a kind of TD-SCDMA system to detect discontinuous transmission method, and in the user terminal, this user terminal comprises in the method application:
Down link controls (Downlink Control Task, DLC) module: jointly complete TD-SCDMA terminal system physical layer descending chain circuit function for coordinating other module.The Main Function of down link control module realizes the scheduling and controlling to physical layer descending chain circuit software.Comprise and overall control is carried out to down link flow process, coordinate ULC to realize random access procedure, synchronous/step-out control, descending DTX control, downlink power control etc.
Joint-detection (Joint Detection, JD) module: for configuration and control RX hardware implementing JD algorithm, and the realization of a part and JD other functions closely-related.Comprise the configuration of RX hardware and control, the detection of Page Indication Channel (PICH), the Detection & Controling of DTX state.
Downlink transfer business receives (Downlink Transport Receive, DTR) module: complete UE descending transmission channel and receive relevant control treatment and functional realiey.Downlink transfer business receiver module completes descending transmission channel handling process under the message-driven of down link control module and joint-detection module, and downlink transfer business receiver module mainly realizes decoding and the demultiplexing function of downlink transmission channel.The number of physical channels of having carried out despreading descrambling through joint-detection module according to this frame is that unit enters channel-decoding and dequantisation unit, the channel datas such as BCH (broadcast channel)/DCH (dedicated channel)/FACH (forward access channel)/PCH (paging channel) obtain original service or the channel associated signalling data of transmitting terminal after handling process, then send into media access control sublayer or more high-rise with the form of transmission block or transport block set.The data of SCCH (supplemental code channel)/FPACH (quick Acquisition Indicator Channel) channel are directly by extracting after the process of downlink transfer business receiver module.The work of downlink transfer business receiver module process comprises the reading of TFCI information, parameters of rate matching calculates, the hardware register of downlink transfer business receiver module configures, control hardware realizes channel-decoding etc.
As shown in Figure 1, in this TD-SCDMA system, user terminal detection discontinuous transmission method comprises step:
S110, down link control module receive the transformat combination instruction TFCI value that downlink transfer business receiver module sends over;
S120, described down link control module judge that described TFCI value be whether 0 mark of SB (0 be) or effective value is (when the scope as this effective value is 1-6, then other value be all 0 and effective value beyond value), if 0 or effective value then receive joint-detection module calculated and the business time-slot signal interference ratio sir value sended over; If be not 0, be not also effective value, then the method process terminates.
In the present embodiment, more specifically, the process of described joint-detection module computing service time slot signal interference ratio sir value specifically comprises:
Obtain the DCH channel coefficients after this community noise reduction, activated code channel situation and Interference Signal Code Power ISCP, calculate described sir value according to described DCH channel coefficients, activated code channel situation and Interference Signal Code Power ISCP according to formula (1),
SIR (db)=10*log10 (RSCP/ (ISCP*ActCodeNum))+SF correction factor (db)
Wherein,
RSCP is the received signal code power of DCH, and in different modes, RSCP has respective computational methods, specifically calculates according to DCH channel coefficients;
ISCP is Interference Signal Code Power;
ActCodeNum is the activated code channel situation in certain estimating window, and in different modes, the computational methods of ActCodeNum value are different;
SF correction factor is the corrected value provided according to different spreading factor situation.
The calculating of above-mentioned sir value carries out for different CCTrCH, and the business of the several CCTrCH of system bearing, just calculates the sir value that these CCTrCH are corresponding.Here RSCP with ActCodeNum is relevant with the CCTrCH configuration of business, ISCP and SF correction factor and business configuration situation have nothing to do.
S130, described down link control module determine the state-detection of carrying out the current discontinuous transmission DTX of terminal according to described TFCI value and described sir value.
In the present embodiment, specifically comprise:
If TFCI value is 0 and sir value is greater than thresholding Qin, then thinking current is DTX state;
If TFCI value is non-zero effective value and sir value is greater than thresholding Qin, then thinking current is non-DTX state.
In other examples, before described step S110, as shown in Figure 2, the method comprises step further:
S108, described down link control module configure dedicated transmission channel DCH channel coefficients, send to downlink transfer business receiver module by described DCH channel coefficients; Wherein more specifically in embodiment, described DCH channel coefficients comprises: DCH working frequency points, timeslot number, activationary time, Coded Combined Transport Channel information (as: type, number etc.) and transport format combination information (as: number, form).
S109, described downlink transfer business receiver module obtain the TFCI value of Coded Combined Transport Channel according to described DCH channel coefficients, and described TFCI value are sent to described down link control module.In other examples, also this TFCI value can be obtained according to other mode.
In the TD-SCDMA system that the embodiment of the present invention provides, terminal detects descending DTX operating state method, detect by sir value and TFCI value the method combined and confirm DTX state, the signal quality of current UE can be reacted more really, improve the accuracy that DTX detects, and simple structure and lower complexity, stable performance, is easy to realize.
The embodiment of the present invention also provides a kind of user terminal, and as shown in Figure 3, this user terminal comprises:
Downlink transfer business receiver module 210, for sending TFCI value to down link control module;
Joint-detection module 220, for calculating and sending business time-slot sir value to down link control module;
Down link control module 230, for receiving the TFCI value that downlink transfer business receiver module sends over, judge that whether described TFCI value is 0 or effective value, if 0 or effective value then receive joint-detection module calculated and the business time-slot sir value sended over, and determine the state-detection of carrying out the current discontinuous transmission DTX of terminal according to described TFCI value and described sir value.
In other examples, further, described down link control module 230, also for configure dedicated transmission channel DCH channel coefficients, sends to downlink transfer business receiver module by described DCH channel coefficients; , more specifically, described DCH channel coefficients comprises: DCH working frequency points, timeslot number, activationary time, Coded Combined Transport Channel information (as: type, number etc.) and transport format combination information (as: number, form).
Described downlink transfer business receiver module 210, also for obtaining the TFCI value of Coded Combined Transport Channel according to described DCH channel coefficients, and sends described TFCI value to described down link control module.
In more specifically embodiment, described joint-detection module, for obtaining DCH channel coefficients, activated code channel situation and Interference Signal Code Power ISCP after this community noise reduction, described sir value is calculated according to formula (1) according to described DCH channel coefficients, activated code channel situation and Interference Signal Code Power ISCP
SIR (db)=10*log10 (RSCP/ (ISCP*ActCodeNum))+SF correction factor (db)
Wherein,
RSCP is the received signal code power of DCH, and ISCP is Interference Signal Code Power, and ActCodeNum is the activated code channel situation in certain estimating window, and SF correction factor is the corrected value provided according to different spreading factor situation.
In more specifically embodiment, described down link control module, for judging and confirming:
If TFCI value is 0 and sir value is greater than certain threshold Qin, then thinking current is DTX state;
If TFCI value is non-zero effective value and sir value is greater than thresholding Qin, then thinking current is non-DTX state.
The user terminal that the embodiment of the present invention provides, detects by sir value and TFCI value the method combined and confirms DTX state, can react the signal quality of current UE more really, improve the accuracy that DTX detects, and simple structure and lower complexity, stable performance, is easy to realize.
These are only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. in TD-SCDMA system, user terminal detects a discontinuous transmission method, it is characterized in that, comprising:
Down link control module receives the transformat combination instruction TFCI value that downlink transfer business receiver module sends over;
Described down link control module judges that whether described TFCI value is 0 or effective value, if 0 or effective value then receive joint-detection module calculated and the business time-slot signal interference ratio sir value sended over;
Described down link control module determines the state-detection of carrying out the current discontinuous transmission DTX of terminal according to described TFCI value and described sir value;
According to described TFCI value and described sir value, described down link control module determines that the state-detection of carrying out the current discontinuous transmission DTX of terminal specifically comprises:
If TFCI value is 0 and sir value is greater than certain threshold Qin, then thinking current is DTX state;
If TFCI value is non-zero effective value and sir value is greater than thresholding Qin, then thinking current is non-DTX state;
Described down link control module receives the transformat combination instruction TFCI value that downlink transfer business receiver module sends over; , comprise further: described down link control module configure dedicated transmission channel DCH channel coefficients, sends to downlink transfer business receiver module by described DCH channel coefficients before;
Described downlink transfer business receiver module obtains the TFCI value of Coded Combined Transport Channel according to described DCH channel coefficients, and described TFCI value is sent to described down link control module.
2. method as claimed in claim 1, it is characterized in that, described DCH channel coefficients comprises: DCH working frequency points, timeslot number, activationary time, Coded Combined Transport Channel information and transport format combination information.
3. method as claimed in claim 1, it is characterized in that, the process of described joint-detection module computing service time slot signal interference ratio sir value specifically comprises:
Obtain the DCH channel coefficients after this community noise reduction, activated code channel situation and Interference Signal Code Power ISCP, calculate described sir value according to described DCH channel coefficients, activated code channel situation and Interference Signal Code Power ISCP according to formula (1),
SIR (db)=10*log10 (RSCP/ (ISCP*ActCodeNum))+SF correction factor (db)
Wherein,
RSCP is the received signal code power of DCH, and ISCP is Interference Signal Code Power, and ActCodeNum is the activated code channel situation in certain estimating window, and SF correction factor is the corrected value provided according to different spreading factor situation.
4. a user terminal, is characterized in that, comprising:
Downlink transfer business receiver module, for sending TFCI value to down link control module;
Joint-detection module, for calculating and sending business time-slot sir value to down link control module;
Down link control module, for receiving the TFCI value that downlink transfer business receiver module sends over, judge that whether described TFCI value is 0 or effective value, if 0 or effective value then receive joint-detection module calculated and the business time-slot sir value sended over, and determine the state-detection of carrying out the current discontinuous transmission DTX of terminal according to described TFCI value and described sir value;
Described down link control module, for judging and confirming:
If TFCI value is 0 and sir value is greater than certain threshold Qin, then thinking current is DTX state;
If TFCI value is non-zero effective value and sir value is greater than thresholding Qin, then thinking current is non-DTX state;
Described down link control module, also for configure dedicated transmission channel DCH channel coefficients, sends to downlink transfer business receiver module by described DCH channel coefficients;
Described downlink transfer business receiver module, also for obtaining the TFCI value of Coded Combined Transport Channel according to described DCH channel coefficients, and sends described TFCI value to described down link control module.
5. user terminal as claimed in claim 4, it is characterized in that, described DCH channel coefficients comprises: DCH working frequency points, timeslot number, activationary time, Coded Combined Transport Channel information and transport format combination information.
6. user terminal as claimed in claim 4, it is characterized in that, described joint-detection module, for obtaining DCH channel coefficients, activated code channel situation and Interference Signal Code Power ISCP after this community noise reduction, described sir value is calculated according to formula (1) according to described DCH channel coefficients, activated code channel situation and Interference Signal Code Power ISCP
SIR (db)=10*log10 (RSCP/ (ISCP*ActCodeNum))+SF correction factor (db)
Wherein,
RSCP is the received signal code power of DCH, and ISCP is Interference Signal Code Power, and ActCodeNum is the activated code channel situation in certain estimating window, and SF correction factor is the corrected value provided according to different spreading factor situation.
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| CN103533581A (en) * | 2012-07-02 | 2014-01-22 | 中兴通讯股份有限公司 | Method and apparatus for channel adjusting |
| CN103997778A (en) * | 2013-02-19 | 2014-08-20 | 联芯科技有限公司 | Receiving method and apparatus of secondary common control physical channel |
| CN105960765B (en) * | 2014-05-30 | 2018-10-02 | 华为技术有限公司 | A kind of cell noise estimation method, system and relevant device |
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| CN1777058B (en) * | 2005-12-05 | 2010-07-21 | 上海宣普实业有限公司 | Power control method under discontinuous emitting state |
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| US7031721B2 (en) * | 2002-05-16 | 2006-04-18 | Interdigital Technology Corporation | Method and system for avoiding power outages at the base station in cellular system using variable rate transmission |
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| CN2684497Y (en) * | 2001-09-28 | 2005-03-09 | 交互数字技术公司 | Time division synchronous code division multi access base station |
| CN1767410A (en) * | 2005-11-25 | 2006-05-03 | 凯明信息科技股份有限公司 | Discontinuous transmitting state power control method in TD-SCDMA system |
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