CN102149121A - 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 be method and the user terminal that user terminal detects the operating state of downlink discontinuous emission (DTX) in TD-SCDMA (TimeDivision-Synchronous Code Division Multiple Access, the TD SDMA) system.
Background technology
Require regulation in the standard " 3GPP TS 25.224Physical layer procedures (physical layer procedure) " in the Uu of TD-SCDMA communication system interface physical-layer techniques, at physical channel S-CCPCH (Secondary Common Control Physical Channel), UL DPCH (uplink special physical channel), DL DPCH (downward special physical channel), can use DTX (Discontinuous Transmission, discontinuous emission) on PUSCH (Physical Uplink Shared Channel) and the PDSCH (Physical Downlink Shared Channel).
After Radio Link is set up, when up (forward link) or descending (reverse link) do not have data to send, physical layer utilization DTX periodically inserts SB (Special Burst, special burst) reduces the delivery flow rate of free of data section, thereby reach the interference that reduces network, improve power system capacity, and reduce the purpose of terminal transmit power.
Physical layer is at CCTrCH (Coded Composite Transport Channel, the coded combination transmission channel) do not receive on that high level wants data block transmitted, first frame at this transmission intercal will send SB so, and as long as do not have the high level data piece to issue on the channel, physical layer will periodically send SB always.In case there is the high level data piece to issue, physical layer will stop DTX immediately and issue normal data block.In descending, the DTX state be the base station according to the physical layer data flow process, decision a period of time sends or does not send signal.During not sending signal, need periodically send the control procedure that special burst SB keeps downlink receiver.
The feature of DTX state and descending SB pattern description:
Can support the business of DTX mode of operation to have: S-CCPCH, UL DPCH, DL DPCH, PUSCH and PDSCH, during DTX, periodically send SB, and the time slot format of SB is with professional identical, it is also identical with business that power takes place, and only send on the minimum number road of the physical resource that this CCTrCH disposes.
First radio frames that descending SB stops in business just begins to send, and that is to say, it is sign that DTX always begins SB with a radio frames.The end of DTX is sign not, can be stopped by data at any time.
The cycle that descending SB sends is SBSP (Special Burst Scheduling Parameter, descending special burst dispatching cycle), is disposed by the upper strata, general SBSP=4, that is to say that per 4 DTX radio frames always send SB on a radio frames of beginning; The SB information bit is the such special sequence of 0101....SB can carry SS (Synchronous Shift, simultaneous bias), TPC (TransmitPower Control, transmitting power control) and TFCI (Transport Format Combination Indicator, transformat combination indication) bit.Have TFCI on the SB time slot, TFCI should be 0 so.
UE (User Equipment, user terminal) can judge the net side according to the data that receive and whether send SB, thereby judge the current DTX state that whether is in, because the detection of SB information bit 0101... is comparatively complicated, be difficult for realizing that TFCI is that 0 this feature detects SB when utilizing SB to send so change into.But under the wireless environment of complexity, owing to be subjected to the influence of channel disturbance, this detection is very inaccurate sometimes.Therefore can adopt SIR (Signal to Interference Ratio, signal interference ratio) and TFCI value to detect the method that combines and confirm SB, thereby reach the purpose that detects the DTX state.
The TFCI information description current transformat combination, be used to notify the TFC (transformat combination) of the current activation of recipient, recipient's physical layer how can to determine in view of the above to the data that receive decode, demultiplexing and the TBS that receives is delivered to MAC (Media Access Control, medium access control) sublayer with which type of TF.For each user, TFCI information will send once in every 10ms radio frames.TFCI symbol behind the coding is in subframe and all be equally distributed in the data block.The TFCI bit number is variable, and it is when calling out beginning, is disposed by high-level signaling.SIR is defined as: SIR=RSCP*SF/Interference.Wherein, RSCP is the DPCH of appointment or the received signal code power on the PDSCH time slot, and Interference is that the indelible received signal of receiver is disturbed in same time slot, the spreading factor of SF for using.The calculating of SIR generally is to calculate by channel impulse response, i.e. this user of SIR=solid size channel receiving signal power/this sub-district ISCP (not multiply by SF again, is because midamble sign indicating number spread spectrum not).Wherein, this user solid size channel receiving signal power is to use the first window accumulated signal energy on average to obtain by this user; ISCP (Interference Signal Code Power in this manual, is meant this sub-district ISCP) obtains by the noise tap calculation in the channel impulse response.
The value of SIR can be reacted the signal quality of current UE more really.The TFCI=0 that (as satisfying a certain threshold requirement, is assumed to be Qin) calculates when sir value is higher can think believable, can be used as the foundation of DTX state-detection; And when sir value hour, it is incredible that the TFCI=0 that calculates should think, can not be as the foundation of DTX state-detection, and the high low threshold of sir value needs to set in advance.
Summary of the invention
Main purpose of the present invention provides method and the user terminal that terminal in a kind of TD-SCDMA system of simple possible detects descending DTX operating state, solve the complicated and high problem of difficulty of implementation procedure in the prior art, and improved the accuracy of DTX state-detection.
The technical solution adopted for the present invention to solve the technical problems is:
User terminal detects discontinuous launching technique in a kind of TD-SCDMA system, and it comprises:
The down link control module receives the transformat combination indication TFCI value that the professional receiver module of downlink transfer 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 the business time-slot signal interference ratio sir value that the joint-detection module is calculated and sends over;
Described down link control module determines to carry out the state-detection of the current discontinuous emission DTX of terminal according to described TFCI value and described sir value.
Preferably, described down link control module receives the transformat combination indication TFCI value that the professional receiver module of downlink transfer sends over; , further comprise: described down link control module configure dedicated transmission channel DCH channel coefficients sends to the professional receiver module of downlink transfer with described DCH channel coefficients before;
The professional receiver module of described downlink transfer obtains the TFCI value of coded combination transmission 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 combination transmitting 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 DCH channel coefficients, activated code channel situation and Interference Signal Code Power ISCP behind this sub-district noise reduction, calculate described sir value according to formula (1) according to described DCH channel coefficients, activated code channel situation and Interference Signal Code Power ISCP,
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 an Interference Signal Code Power, and ActCodeNum is the activated code channel situation in certain estimating window, and the SF correction factor is a corrected value that provides according to different spreading factor situations.
Preferably, describedly determine to carry out the state-detection of the current discontinuous emission DTX of terminal, specifically comprise according to described TFCI value and described sir value:
If TFCI value be 0 and sir value greater than certain threshold Qin, then think the current DTX state that is;
If TFCI value be non-0 effective value and sir value greater than thresholding Qin, then thinking current is non-DTX state.
The present invention also provides a kind of user terminal, and it comprises:
The professional receiver module of downlink transfer is used for sending the TFCI value to the down link control module;
The joint-detection module is used to calculate and sends the business time-slot sir value to the down link control module;
The down link control module, be used to receive the TFCI value that the professional receiver module of downlink transfer sends over, judge that whether described TFCI value is 0 or effective value, if 0 or effective value then receive the business time-slot sir value that the joint-detection module is calculated and sends over, and determine to carry out the state-detection of the current discontinuous emission DTX of terminal according to described TFCI value and described sir value.
Preferably, described down link control module also is used for configure dedicated transmission channel DCH channel coefficients, and described DCH channel coefficients is sent to the professional receiver module of downlink transfer;
The professional receiver module of described downlink transfer also is used for obtaining according to described DCH channel coefficients the TFCI value of coded combination transmission channel, 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 combination transmitting channel information (type, number etc.) and transport format combination information (number, form).
Preferably, described joint-detection module, be used to obtain DCH channel coefficients, activated code channel situation and Interference Signal Code Power ISCP behind this sub-district noise reduction, calculate described sir value 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 an Interference Signal Code Power, and ActCodeNum is the activated code channel situation in certain estimating window, and the SF correction factor is a corrected value that provides according to different spreading factor situations.
Preferably, described down link control module is used for judging and confirming:
If TFCI value be 0 and sir value greater than certain threshold Qin, then think the current DTX state that is;
If TFCI value be non-0 effective value and sir value greater than thresholding Qin, then thinking current is non-DTX state.
Implement technical scheme of the present invention, have following beneficial effect: terminal detects the method and the user terminal of descending DTX operating state in the TD-SCDMA provided by the invention system, detect the method that combines by sir value and TFCI value and confirm the DTX state, can react the signal quality of current UE more really, improved the accuracy that DTX detects, and simple structure and lower complexity, stable performance is easy to realize.
Description of drawings
The method flow diagram that Fig. 1 provides for the embodiment of the invention;
Another flow chart of method that Fig. 2 provides for the embodiment of the invention;
The structural representation of the user terminal that Fig. 3 provides for the embodiment of the invention.
The realization of the object of the invention, functional characteristics and advantage will be in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The embodiment of the invention provides that user terminal detects discontinuous launching technique in a kind of TD-SCDMA system, and this method is applied in the user terminal, and this user terminal comprises:
Down link control (Downlink Control Task, DLC) module: be used to coordinate other module and finish TD-SCDMA terminal system physical layer descending chain circuit function jointly.The main effect of down link control module is scheduling and the control that realizes physical layer descending chain circuit software.Comprise to the down link flow process totally control, cooperate ULC realize random access procedure, synchronously/step-out control, descending DTX control, downlink power control etc.
Joint-detection (Joint Detection, JD) module: be used for configuration and control RX hardware realization JD algorithm, and the realization of a part and closely-related other functions of JD.Comprise detection, DTX status detection and the control of the configuration of RX hardware and control, Page Indication Channel (PICH).
Downlink transfer is professional to be received (Downlink Transport Receive, DTR) module: finish the UE descending transmission channel and receive relevant control and treatment and function realization.The professional receiver module of downlink transfer is finished the descending transmission channel handling process under the message-driven of down link control module and joint-detection module, the professional receiver module of downlink transfer is mainly realized the decoding and the demultiplexing function of downlink transmission channel.The number of physical channels of having carried out the despreading descrambling through joint-detection module frame according to this is that unit enters channel-decoding and dequantisation unit, BCH (broadcast channel)/DCH (dedicated channel)/FACH (forward access channel)/PCH channel datas such as (paging channel) is sent into media access control sublayer or more high-rise with the form of transmission block or transport block set again through obtaining the original business or the channel associated signalling data of transmitting terminal after the handling process.The data of SCCH (supplemental code channel)/FPACH (Acquisition Indicator Channel fast) channel are directly handled the back by the professional receiver module of downlink transfer and are extracted.The work that the professional receiver module of downlink transfer is handled comprises that TFCI information reads, parameters of rate matching is calculated, the hardware register of the professional receiver module of downlink transfer disposes, control hardware is realized channel-decoding etc.
As shown in Figure 1, user terminal detects discontinuous launching technique and comprises step in this TD-SCDMA system:
S110, down link control module receive the transformat combination indication TFCI value that the professional receiver module of downlink transfer sends over;
S120, described down link control module judge that whether described TFCI value is that 0 (0 is the sign of SB) or effective value are (when being 1-6 as the scope of this effective value, then other value all be 0 and effective value beyond value), if 0 or effective value then receive the business time-slot signal interference ratio sir value that the joint-detection module is calculated and sends over; If be not 0, be not effective value yet, then this procedure finishes.
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 DCH channel coefficients, activated code channel situation and Interference Signal Code Power ISCP behind this sub-district noise reduction, calculate described sir value 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 under different mode, RSCP has computational methods separately, specifically calculates according to the DCH channel coefficients;
ISCP is an Interference Signal Code Power;
ActCodeNum is the activated code channel situation in certain estimating window, under different mode, and the computational methods difference of ActCodeNum value;
The SF correction factor is a corrected value that provides according to different spreading factor situations.
The calculating of above-mentioned sir value is to carry out at different CCTrCH, and the business of the several CCTrCH of system bearing is just calculated the sir value of these several CCTrCH correspondences.The RSCP here is relevant with the CCTrCH configuration of business with ActCodeNum, and ISCP and SF correction factor and business configuration situation are irrelevant.
S130, described down link control module determine to carry out the state-detection of the current discontinuous emission DTX of terminal according to described TFCI value and described sir value.
In the present embodiment, specifically comprise:
If TFCI value be 0 and sir value greater than thresholding Qin, then think the current DTX state that is;
If TFCI value be non-0 effective value and sir value greater than thresholding Qin, then thinking current is non-DTX state.
In other embodiment, before the described step S110, as shown in Figure 2, this method further comprises step:
S108, described down link control module configure dedicated transmission channel DCH channel coefficients send to the professional receiver module of downlink transfer with described DCH channel coefficients; Wherein more specifically among the embodiment, described DCH channel coefficients comprises: DCH working frequency points, timeslot number, activationary time, coded combination transmitting channel information (as: type, number etc.) and transport format combination information (as: number, form).
The professional receiver module of S109, described downlink transfer obtains the TFCI value of coded combination transmission channel according to described DCH channel coefficients, and described TFCI value is sent to described down link control module.In other embodiment, also can obtain this TFCI value according to other mode.
Terminal detects descending DTX operating state method in the TD-SCDMA system that the embodiment of the invention provides, detect the method that combines by sir value and TFCI value and confirm the DTX state, can react the signal quality of current UE more really, improved the accuracy that DTX detects, and simple structure and lower complexity, stable performance is easy to realize.
The embodiment of the invention also provides a kind of user terminal, and as shown in Figure 3, this user terminal comprises:
The professional receiver module 210 of downlink transfer is used for sending the TFCI value to the down link control module;
Joint-detection module 220 is used to calculate and sends the business time-slot sir value to the down link control module;
Down link control module 230, be used to receive the TFCI value that the professional receiver module of downlink transfer sends over, judge that whether described TFCI value is 0 or effective value, if 0 or effective value then receive the business time-slot sir value that the joint-detection module is calculated and sends over, and determine to carry out the state-detection of the current discontinuous emission DTX of terminal according to described TFCI value and described sir value.
In other embodiment, further, described down link control module 230 also is used for configure dedicated transmission channel DCH channel coefficients, and described DCH channel coefficients is sent to the professional receiver module of downlink transfer; , more specifically, described DCH channel coefficients comprises: DCH working frequency points, timeslot number, activationary time, coded combination transmitting channel information (as: type, number etc.) and transport format combination information (as: number, form).
The professional receiver module 210 of described downlink transfer also is used for obtaining according to described DCH channel coefficients the TFCI value of coded combination transmission channel, and described TFCI value is sent to described down link control module.
In embodiment more specifically, described joint-detection module, be used to obtain DCH channel coefficients, activated code channel situation and Interference Signal Code Power ISCP behind this sub-district 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 an Interference Signal Code Power, and ActCodeNum is the activated code channel situation in certain estimating window, and the SF correction factor is a corrected value that provides according to different spreading factor situations.
In embodiment more specifically, described down link control module is used for judging and confirming:
If TFCI value be 0 and sir value greater than certain threshold Qin, then think the current DTX state that is;
If TFCI value be non-0 effective value and sir value greater than thresholding Qin, then thinking current is non-DTX state.
The user terminal that the embodiment of the invention provides detects the method that combines by sir value and TFCI value and confirms the DTX state, can react the signal quality of current UE more really, improved the accuracy that DTX detects, and simple structure and lower complexity, stable performance is easy to realize.
Below only be preferred embodiment of the present invention,, all any modifications of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within protection scope of the present invention not in order to restriction the present invention.
Claims (10)
1. user terminal detects discontinuous launching technique in the TD-SCDMA system, it is characterized in that, comprising:
The down link control module receives the transformat combination indication TFCI value that the professional receiver module of downlink transfer 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 the business time-slot signal interference ratio sir value that the joint-detection module is calculated and sends over;
Described down link control module determines to carry out the state-detection of the current discontinuous emission DTX of terminal according to described TFCI value and described sir value.
2. method according to claim 1 is characterized in that, described down link control module receives the transformat combination indication TFCI value that the professional receiver module of downlink transfer sends over; , further comprise: described down link control module configure dedicated transmission channel DCH channel coefficients sends to the professional receiver module of downlink transfer with described DCH channel coefficients before;
The professional receiver module of described downlink transfer obtains the TFCI value of coded combination transmission channel according to described DCH channel coefficients, and described TFCI value is sent to described down link control module.
3. as method as described in the claim 2, it is characterized in that described DCH channel coefficients comprises: DCH working frequency points, timeslot number, activationary time, coded combination transmitting channel information and transport format combination information.
4. method according to claim 1 is characterized in that the process of described joint-detection module computing service time slot signal interference ratio sir value specifically comprises:
Obtain DCH channel coefficients, activated code channel situation and Interference Signal Code Power ISCP behind this sub-district noise reduction, calculate described sir value 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 an Interference Signal Code Power, and ActCodeNum is the activated code channel situation in certain estimating window, and the SF correction factor is a corrected value that provides according to different spreading factor situations.
5. method according to claim 1 is characterized in that, describedly determines to carry out the state-detection of the current discontinuous emission DTX of terminal according to described TFCI value and described sir value, specifically comprises:
If TFCI value be 0 and sir value greater than certain threshold Qin, then think the current DTX state that is;
If TFCI value be non-0 effective value and sir value greater than thresholding Qin, then thinking current is non-DTX state.
6. a user terminal is characterized in that, comprising:
The professional receiver module of downlink transfer is used for sending the TFCI value to the down link control module;
The joint-detection module is used to calculate and sends the business time-slot sir value to the down link control module;
The down link control module, be used to receive the TFCI value that the professional receiver module of downlink transfer sends over, judge that whether described TFCI value is 0 or effective value, if 0 or effective value then receive the business time-slot sir value that the joint-detection module is calculated and sends over, and determine to carry out the state-detection of the current discontinuous emission DTX of terminal according to described TFCI value and described sir value.
7. as user terminal as described in the claim 6, it is characterized in that,
Described down link control module also is used for configure dedicated transmission channel DCH channel coefficients, and described DCH channel coefficients is sent to the professional receiver module of downlink transfer;
The professional receiver module of described downlink transfer also is used for obtaining according to described DCH channel coefficients the TFCI value of coded combination transmission channel, and described TFCI value is sent to described down link control module.
8. as user terminal as described in the claim 7, it is characterized in that described DCH channel coefficients comprises: DCH working frequency points, timeslot number, activationary time, coded combination transmitting channel information and transport format combination information.
9. as user terminal as described in the claim 6, it is characterized in that, described joint-detection module, be used to obtain DCH channel coefficients, activated code channel situation and Interference Signal Code Power ISCP behind this sub-district 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 an Interference Signal Code Power, and ActCodeNum is the activated code channel situation in certain estimating window, and the SF correction factor is a corrected value that provides according to different spreading factor situations.
10. as user terminal as described in the claim 6, it is characterized in that described down link control module is used for judging and confirming:
If TFCI value be 0 and sir value greater than certain threshold Qin, then think the current DTX state that is;
If TFCI value be non-0 effective value and sir value greater than thresholding Qin, then thinking current is non-DTX state.
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Application publication date: 20110810 Assignee: Xi'an Chris Semiconductor Technology Co. Ltd. Assignor: SHENZHEN ZTE MICROELECTRONICS TECHNOLOGY CO., LTD. Contract record no.: 2019440020036 Denomination of invention: Discontinuous transmission method for user terminal detection and user terminal in TD-SCDMA (Division-Synchronization Code Division Multiple Access) system Granted publication date: 20150506 License type: Common License Record date: 20190619 |