CN102340790B - A kind of method and system of calibrating the closed loop amount that subscriber equipment is safeguarded - Google Patents

Abstract

The invention discloses a kind of method of calibrating the closed loop amount that subscriber equipment is safeguarded, the method comprises: in the absolute grant channel of control channel enhancement type special channel (E-AGCH) frame structure of expansion, carry power control command (TPC) command word; When School Affairs (CRC) check results is correct, subscriber equipment (UE) according to described TPC command word, to the closed loop amount P that UE safeguards _e-basecalibrate.The invention also discloses a kind of system of calibrating the closed loop amount that subscriber equipment is safeguarded, in system, the alignment unit of UE side is used for carrying TPC command word in the control channel E-AGCH frame structure expanded, when CRC check result is correct, UE according to described TPC command word, to the closed loop amount P that UE safeguards _e-basecalibrate.Adopt method and system of the present invention, the P that UE and network side are safeguarded can be avoided _e-basebetween there is deviation, improve calibration accuracy.

Description

Method and system for calibrating closed loop quantity maintained by user equipment

Technical Field

The invention relates to a time division synchronous code division multiple access (TD-SCDMA) technology in the field of mobile communication, in particular to a closed loop quantity P maintained by calibration User Equipment (UE) in a TD-SCDMA high-speed uplink packet access (HSUPA) system_e-baseMethods and systems of (1).

Background

In HSUPA system, E-AGCH and E-PUCH pair carry on the closed loop power control, in base station NodeB side, produce the power control command TPC of the closed loop through comparing with quality target value that the high level gives, carry TPC command word to UE through TPC field (TPCfield) in the burst structure of E-AGCH, used for controlling E-PUCH sending power of UE; on the UE side, a TPC command word is also generated by comparing with a quality target given by a higher layer, and is carried to the NodeB by the TPCfield in the E-PUCH burst structure, for controlling the power level at which the NodeB sends the E-AGCH. Wherein the E-AGCH is an enhanced dedicated channel (E-DCH) absolute grant channel; the E-PUCH is an enhanced uplink physical channel; the E-AGCH burst structure used in TD-SCDMA system is shown in fig. 1, and the TPCfield is a component of the burst structure.

If the power of the physical channel should be increased, the TPC command word is set to up (up), indicating that the power is adjusted up; if a decrease is required, the TPC command word is set to down, indicating that the power is adjusted downward.

P_e-baseIs a closed-loop quantity, P, maintained by the UE and NodeB_e-baseThe relationship with TPC is shown in the following equation (1):

$P_{e-\mathrm{base}}={\mathrm{PRX}}_{\mathrm{des}\_\mathrm{base}}+\mathrm{step}*\underset{i}{\mathrm{\Σ}}{\mathrm{TPC}}_i={\mathrm{PRX}}_{\mathrm{des}\_\mathrm{base}}+P_{\mathrm{TPC}}---\left(1\right)$

in formula (1), PRX_{des_base}Setting the average interference value of the uplink time slot of the E-DCH as the expected received power of the E-PUCH reference through RRC signaling notification; step is the power control step size Δ_e-baseConfigured by a higher layer; TPC_iIs a closed loop power control command.

In the prior art, each time the UE receives the E-AGCH, if the checksum (CRC) check result is correct, the UE will perform a TPC command word on the P maintained by the UE according to the TPC command word carried by the TPCfield in the E-AGCH burst structure_e-baseMaking adjustments to maintain P with network side maintained_e-baseAs consistent as possible. However, since the UE does not know whether the decoding is correct or not, as long as the UE judges that the CRC check result is correct, P is adjusted according to the TPC command word obtained from the decoding result of TPCfield decoding_e-baseTherefore, if the CRC check result is correct and the TPCfield decoding in the E-AGCH burst structure is wrong, the UE pair P is caused_e-baseAdjustment is performed in the wrong direction, for example, adjustment should be performed in the up direction, but the decoding error causes the decoding result to be down, and finally adjustment is performed in the down direction, which causes P maintained by the UE and the network side_e-baseWith a relatively large deviation between them, especially in multi-carrier HSUPA systems, P_e-baseParameters maintained for carrier level, P maintained by UE and network side_e-baseThe probability of a deviation therebetween is increased more greatly. At present, there is an urgent need for a method for avoiding the maintenance of the UE and the network sideP of_e-baseA calibration scheme in which deviations occur therebetween.

Disclosure of Invention

In view of the above, the main objective of the present invention is to provide a method and system for calibrating a closed loop amount maintained by a UE, which can avoid P maintained by the UE and a network side_e-baseDeviation occurs between the two, and the accuracy of calibration is improved.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a method of calibrating an amount of closed loop maintained by a user equipment, the method comprising:

carrying a power control command (TPC) command word in an extended control channel enhanced dedicated channel absolute grant channel (E-AGCH) frame structure;

when the check sum (CRC) check result is correct, the User Equipment (UE) carries out closed loop quantity P maintained by the UE according to the TPC command word_e-baseAnd (6) carrying out calibration.

Wherein, the method also comprises: and when the network side carries out scheduling authorization, carrying the obtained TPC command word in the extended control channel E-AGCH frame structure.

Wherein the TPC command word comprises: a value of 0 or a value of 1; wherein the value 1 represents an upregulation P_e-baseAccordingly, the value 0 represents the downregulation P_e-base(ii) a Alternatively, the value 1 represents the downregulation P_e-baseAccordingly, the value 0 represents an upregulation P_e-base。

Wherein, the UE carries out closed-loop quantity P maintained by the UE according to the TPC command word_e-baseAfter the calibration, the method further comprises: the UE is according to the pair P_e-baseAnd judging the transmitting power of an enhanced uplink physical channel (E-PUCH) corresponding to the E-AGCH according to the calibration result, and transmitting the E-PUCH.

Wherein the TPC command wordSpecifically, when the value is 1, the method further includes: said pair P_e-baseThe calibration result is specifically that the power is adjusted upwards, and the transmitting power of the E-PUCH is judged to need to be increased;

correspondingly, when the TPC command word is specifically the value 0, the method further includes: said pair P_e-baseSpecifically, the calibration result is that the power is adjusted downwards, and the transmitting power of the E-PUCH is judged to need to be reduced; or,

when the TPC command word is specifically the value 1, the method further includes: said pair P_e-baseSpecifically, the calibration result is that the power is adjusted downwards, and the transmitting power of the E-PUCH is judged to need to be reduced;

correspondingly, when the TPC command word is specifically the value 0, the method further includes: said pair P_e-baseAnd the calibration result is specifically that the power is adjusted upwards, and the transmitting power of the E-PUCH is judged to need to be increased.

Wherein, the method also comprises: if the network side receives the E-PUCH and the CRC result is correct, the network side judges that the UE has correctly received the E-AGCH and carries out closed loop quantity P maintained by the network side according to the TPC command word_e-baseCarrying out calibration;

if the network side does not receive the E-PUCH, the network side judges that the UE does not correctly receive the E-AGCH and keeps the closed loop quantity P maintained by the network side_e-baseAnd is not changed.

A system for calibrating an amount of closed loop maintained by a user device, the system comprising: a calibration unit at the UE side, configured to, when a CRC result is correct and the extended control channel E-AGCH frame structure carries a TPC command word, enable the UE to perform closed loop quantity P maintained by the UE according to the TPC command word_e-baseAnd (6) carrying out calibration.

Wherein the TPC command word comprises: a value of 0 or a value of 1; wherein the value 1 represents an upregulation P_e-baseAccordingly, the value 0 represents the downregulation P_e-base(ii) a OrThe value 1 represents the downregulation P_e-baseAccordingly, the value 0 represents an upregulation P_e-base。

Wherein, this system still includes: a power adjustment judging unit and a transmitting unit at the UE side; wherein,

the power adjustment judging unit at the UE side is used for the UE to adjust the power according to the pair P_e-baseJudging the transmitting power of the E-PUCH corresponding to the E-AGCH according to the calibration result;

the sending unit is configured to send the E-PUCH.

Wherein the power adjustment determining unit at the UE side is further configured to determine the pair P when the TPC command word is specifically the value 1_e-baseThe calibration result is specifically that the power is adjusted upwards, and the transmitting power of the E-PUCH is judged to need to be increased; correspondingly, when the TPC command word is specifically the value 0, the pair P_e-baseSpecifically, the calibration result is that the power is adjusted downwards, and the transmitting power of the E-PUCH is judged to need to be reduced; or,

when the TPC command word is the value 1, the pair P_e-baseSpecifically, the calibration result is that the power is adjusted downwards, and the transmitting power of the E-PUCH is judged to need to be reduced; correspondingly, when the TPC command word is specifically the value 0, the pair P_e-baseAnd the calibration result is specifically that the power is adjusted upwards, and the transmitting power of the E-PUCH is judged to need to be increased.

Wherein, this system still includes: a calibration unit on the network side, configured to determine that the UE has correctly received the E-AGCH when the network side receives the E-PUCH and the CRC result is correct, and apply the TPC command word to a closed loop quantity P maintained by the network side_e-baseCarrying out calibration; when the network side does not receive the E-PUCH, the network side judges that the UE does not correctly receive the E-AGCH and keeps the closed loop quantity P maintained by the network side_e-baseAnd is not changed.

The invention is in the extended control channel E-AGCH frameThe structure carries TPC command words, when the CRC check result is correct, the UE carries the TPC command words carried in the extended control channel E-AGCH frame structure to the closed loop quantity P maintained by the UE_e-baseAnd (6) carrying out calibration.

By adopting the invention, the calibration is carried out according to the TPC command word carried in the frame structure of the extended control channel E-AGCH, thereby avoiding the P maintained by the UE and the network side_e-baseDeviation occurs between the two, and the accuracy of calibration is improved.

Drawings

FIG. 1 is a diagram illustrating a conventional E-AGCH burst structure;

FIG. 2 is a diagram illustrating a conventional frame structure of an E-AGCH;

FIG. 3 is a diagram illustrating an extended frame structure of a control channel E-AGCH according to the present invention;

FIG. 4 is a schematic flow chart of an embodiment of the method of the present invention.

Detailed Description

The basic idea of the invention is: when the extended control channel E-AGCH frame structure carries TPC command words and the CRC check result is correct, the UE carries the TPC command words in the extended control channel E-AGCH frame structure to the closed loop quantity P maintained by the UE_e-baseAnd (6) carrying out calibration.

Here, it should be noted that: the closed-loop quantity is P_e-baseAnd will not be described in detail. The control channel E-AGCH frame structure and the E-AGCH burst structure are not the same concept, and the control channel E-AGCH frame structure refers to a composition structure of data information carried by an E-AGCH channel; the E-AGCH burst structure refers to the structure of the E-AGCH channel, and the process of sending the E-AGCH refers to the process of organizing and carrying the E-AGCH frame structure onto the E-AGCH channel, the process of receiving the E-AGCH and the process of receiving the E-AGCHThe sending process is opposite and will not be described in detail.

The following describes the embodiments in further detail with reference to the accompanying drawings.

By adopting the prior art, the UE carries out calibration according to TPC command words carried by TPCfield in the E-AGCH burst structure, when the decoding of a TPC domain is wrong and the CRC is correct, the UE still uses the wrong TPC command words to carry out closed-loop power control, thereby adjusting P to the wrong direction_e-baseWhen the network side receives the corresponding E-PUCH, the network side considers that the UE receives the correct TPC command word and adjusts the P of the UE side_e-baseThe network side maintains P according to the original TPC command word_e-baseThe values are adjusted, which results in P maintained by the UE and the network side_e-baseThe deviation occurs between the E-PUCH transmitting power and the target value, so that the correct receiving of the E-PUCH is influenced or the uplink interference is increased_e-baseP which the network side can maintain at this time_e-baseThe value is adjusted accordingly, so that the P maintained by the UE and the network side can be avoided_e-baseSo as to make UE and P maintained by network side have deviation_e-baseConsistent with each other.

A method of calibrating a closed loop quantity maintained by a UE, the method comprising:

TPC command words are carried in an extended control channel E-AGCH frame structure; when the CRC result is correct, the UE carries the TPC command word carried in the extended control channel E-AGCH frame structure to the closed loop quantity P maintained by the UE_e-baseAnd (6) carrying out calibration.

Furthermore, when the network side carries out scheduling authorization, the obtained TPC command word is carried in the extended control channel E-AGCH frame structure, and the UE uses the extension after receiving the E-AGCH and verifying the correct CRCTPC command word carried in E-AGCH frame structure of extended control channel for P maintained by UE_e-baseAnd carrying out calibration adjustment.

Further, the TPC command word is obtained as: the network side generates closed loop TPC command words by comparing them with quality target values given by higher layers.

The invention is illustrated below.

Example (c): the extended control channel E-AGCH frame structure is shown in fig. 3, and includes 5 bits of absolute grant power, 4 bits of code resource information, 5 bits of slot resource information, 3 bits of E-AGCH cyclic sequence number, 2 bits of flag field, 2 bits of special information 1, 5 bits of special information 2, 3 bits of E-UCCH number indication, 1 bit of TPC command word and 16 bits of CRC.

The existing control channel E-AGCH frame structure is shown in fig. 2, and includes 5 bits of absolute grant power, 4 bits of code resource information, 5 bits of slot resource information, 3 bits of E-AGCH cyclic sequence number, 2 bits of flag field, 2 bits of special information 1, 5 bits of special information 2, 3 bits of E-UCCH number indication, 1 bit of reserved bit, and 16 bits of CRC. Wherein with the present invention the reserved bits are used to carry the TPC command words as shown in figure 3. Here, it should be noted that: the extended control channel E-AGCH frame structure shown in fig. 3 is a specific example for illustrating the scheme of the present invention, and is not intended to limit the present invention.

The TPC command word of the invention is carried in an extended control channel E-AGCH frame structure and is 1 bit, the value of the TPC command word can be 0 or 1, and can respectively represent down or up and can also respectively represent up or down to indicate P_e-baseThe step size of the adjustment is configured by the higher layer. That is, the TPC command word includes: a value of 0 or a value of 1; wherein the value 1 represents an upregulation P_e-baseCorrespondingly, a value of 0 denotes the downregulation P_e-base(ii) a Alternatively, a value of 1 indicates a downregulation of P_e-baseCorrespondingly, the value 0 represents an upregulation P_e-base。

When the network side carries out scheduling authorization, the TPC command word is carried in an extended control channel E-AGCH frame structure, and after the UE receives the E-AGCH and verifies that the CRC is correct, the UE uses the TPC command word carried in the extended control channel E-AGCH frame structure to carry out P pair_e-baseAnd (6) adjusting. After the network side receives the E-PUCH corresponding to the E-AGCH sent by the UE, the network side considers that the UE correctly receives the E-AGCH and correctly adjusts the P_e-baseValue, P maintained by the network side at this time_e-baseAnd performing corresponding adjustment.

Here, it should be noted that: shown in fig. 3 is an extended control channel E-AGCH frame structure. FIG. 1 shows an E-AGCH burst structure, wherein the training sequence in FIG. 1 is denoted by Midamble, and the SS field is a synchronization command word field; the TPC field is the power control command word field.

The method comprises the following steps: NodeB and UE maintain P respectively_e-baseAnd (5) calibrating.

The process shown in fig. 4 includes the following steps:

step 101: the NodeB generates closed loop TPC command words by comparison with quality target values given by higher layers.

Step 102: NodeB organizes the expanded control channel E-AGCH frame structure, fills in TPC command words, and carries out the coding and physical channel mapping process before sending.

Step 103: and the NodeB sends the E-AGCH.

Step 104: the UE receives the E-AGCH and obtains the TPC command word.

Here, the step is specifically: after receiving the E-AGCH, the UE judges whether the CRC is correct, if the CRC is correct, the UE analyzes the E-AGCH and obtains a TPC command word carried in the E-AGCH, and the step 105 is executed; if the CRC is judged to be incorrect, the content received this time is discarded.

Step 105: UE adjusts P according to the obtained TPC command_e-baseThe value is obtained.

Step 106: UE according to P_e-baseThe result of the adjustment is determined to be E-AAnd transmitting the E-PUCH according to the transmission power of the E-PUCH corresponding to the GCH.

Step 107: when NodeB receives E-PUCH and detects that CRC is correct, the UE is considered to correctly receive E-AGCH and adjust P maintained by the UE side_e-baseThe NodeB adjusts the P maintained by the NodeB according to the TPC command word in step 101_e-base。

Step 108: when the NodeB does not receive the E-PUCH, the NodeB considers that the UE does not correctly receive the E-AGCH, and the NodeB maintains the P maintained by the NodeB_e-baseAnd is not changed.

A system for calibrating closed loop quantity maintained by user equipment comprises a calibration unit at a UE side, wherein the calibration unit at the UE side is used for carrying TPC command words in an extended control channel E-AGCH frame structure, and when a CRC check result is correct, the UE carries the TPC command words in the extended control channel E-AGCH frame structure to calibrate the closed loop quantity P maintained by the UE_e-baseAnd (6) carrying out calibration.

Here, the TPC command word carried in the extended control channel E-AGCH frame structure includes: a value of 0 or a value of 1; wherein the value 1 represents an upregulation P_e-baseCorrespondingly, a value of 0 denotes the downregulation P_e-base(ii) a Alternatively, a value of 1 indicates a downregulation of P_e-baseCorrespondingly, the value 0 represents an upregulation P_e-base。

Here, the system further includes a power adjustment judgment unit and a transmission unit on the UE side; wherein, the power adjustment judging unit at the UE side is used for the UE to judge the power adjustment according to the pair P_e-baseAnd judging the transmitting power of the E-PUCH corresponding to the E-AGCH as a result of the calibration. The sending unit is used for sending the E-PUCH.

Here, the UE-side power adjustment determining unit is further configured to determine, when the TPC command word carried in the extended control channel E-AGCH frame structure is specifically a value 1, P_e-baseThe calibration result is specifically that the power is adjusted upwards, and the transmitting power of the E-PUCH is judged to be increased; correspondingly, when the TPC command word carried in the extended control channel E-AGCH frame structure is specifically a value of 0, the control channel E-AGCH frame structure is used for P_e-baseThe calibration result is specifically downward power adjustment, and the transmission power of the E-PUCH is judged to be reduced; or,

when the TPC command word carried in the extended control channel E-AGCH frame structure is specifically a value of 1, for P_e-baseThe calibration result is specifically downward power adjustment, and the transmission power of the E-PUCH is judged to be reduced; correspondingly, when the TPC command word carried in the extended control channel E-AGCH frame structure is specifically a value of 0, the control channel E-AGCH frame structure is used for P_e-baseThe calibration result is specifically that the power is adjusted upwards, and the transmission power of the E-PUCH needs to be increased is judged.

Here, the system further includes a calibration unit on the network side, where the calibration unit on the network side is configured to determine that the UE has correctly received the E-AGCH when the network side receives the E-PUCH and the CRC check result is correct, and apply the TPC command word to the closed loop metric P maintained by the network side_e-baseCarrying out calibration; when the network side does not receive the E-PUCH, the network side judges that the UE does not correctly receive the E-AGCH and keeps the closed loop quantity P maintained by the network side_e-baseAnd is not changed.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims (11)

1. A method of calibrating a closed loop quantity maintained by a user equipment, the method comprising:

carrying a power control command (TPC) command word in an extended control channel enhanced dedicated channel absolute grant channel (E-AGCH) frame structure;

when the check sum (CRC) check result is correct, the User Equipment (UE) carries out closed loop quantity P maintained by the UE according to the TPC command word_e-baseCarrying out calibration;

the control channel E-AGCH frame structure refers to a composition structure of data information carried by an E-AGCH channel.

2. The method of claim 1, further comprising: and when the network side carries out scheduling authorization, carrying the obtained TPC command word in the extended control channel E-AGCH frame structure.

3. The method of claim 1 or 2, wherein the TPC command word comprises: a value of 0 or a value of 1; wherein the value 1 represents an upregulation P_e-baseAccordingly, the value 0 represents the downregulation P_e-base(ii) a Alternatively, the value 1 represents the downregulation P_e-baseAccordingly, the value 0 represents an upregulation P_e-base。

4. The method of claim 3, wherein the UE maintains a closed loop metric P for the UE based on the TPC command word_e-baseAfter the calibration, the method further comprises: the UE is according to the pair P_e-baseAnd judging the transmitting power of an enhanced uplink physical channel (E-PUCH) corresponding to the E-AGCH according to the calibration result, and transmitting the E-PUCH.

5. The method of claim 4, wherein when the TPC command word is embodied as the value 1, the method further comprises: said pair P_e-baseThe calibration result is specifically that the power is adjusted upwards, and the transmitting power of the E-PUCH is judged to need to be increased;

correspondingly, when the TPC command word is specifically the value 0, the method further includes: said pair P_e-baseSpecifically, the calibration result is that the power is adjusted downwards, and the transmitting power of the E-PUCH is judged to need to be reduced; or,

when the TPC command word is specifically the value 1, the method further includes: said pair P_e-baseSpecifically, the calibration result is that the power is adjusted downwards, and the transmitting power of the E-PUCH is judged to need to be reduced;

accordingly, the TPC commandWhen the command is specifically the value 0, the method further comprises: said pair P_e-baseAnd the calibration result is specifically that the power is adjusted upwards, and the transmitting power of the E-PUCH is judged to need to be increased.

6. The method of claim 5, further comprising: if the network side receives the E-PUCH and the CRC result is correct, the network side judges that the UE has correctly received the E-AGCH and carries out closed loop quantity P maintained by the network side according to the TPC command word_e-baseCarrying out calibration;

if the network side does not receive the E-PUCH, the network side judges that the UE does not correctly receive the E-AGCH and keeps the closed loop quantity P maintained by the network side_e-baseAnd is not changed.

7. A system for calibrating a closed loop quantity maintained by a user equipment, the system comprising: a calibration unit at the UE side, configured to, when a CRC result is correct and the extended control channel E-AGCH frame structure carries a TPC command word, enable the UE to perform closed loop quantity P maintained by the UE according to the TPC command word_e-baseCarrying out calibration;

the control channel E-AGCH frame structure refers to a composition structure of data information carried by an E-AGCH channel.

8. The system of claim 7, wherein the TPC command word comprises: a value of 0 or a value of 1; wherein the value 1 represents an upregulation P_e-baseAccordingly, the value 0 represents the downregulation P_e-base(ii) a Alternatively, the value 1 represents the downregulation P_e-baseAccordingly, the value 0 represents an upregulation P_e-base。

9. The system of claim 8, further comprising: a power adjustment judging unit and a transmitting unit at the UE side; wherein,

the power adjustment judging unit at the UE side is usedAccording to the pair P at the UE_e-baseJudging the transmitting power of the E-PUCH corresponding to the E-AGCH according to the calibration result;

the sending unit is configured to send the E-PUCH.

10. The system of claim 9, wherein the UE-side power adjustment determining unit is further configured to determine the pair P when the TPC command word is specifically the value 1_e-baseThe calibration result is specifically that the power is adjusted upwards, and the transmitting power of the E-PUCH is judged to need to be increased; correspondingly, when the TPC command word is specifically the value 0, the pair P_e-baseSpecifically, the calibration result is that the power is adjusted downwards, and the transmitting power of the E-PUCH is judged to need to be reduced; or,

when the TPC command word is the value 1, the pair P_e-baseSpecifically, the calibration result is that the power is adjusted downwards, and the transmitting power of the E-PUCH is judged to need to be reduced; correspondingly, when the TPC command word is specifically the value 0, the pair P_e-baseAnd the calibration result is specifically that the power is adjusted upwards, and the transmitting power of the E-PUCH is judged to need to be increased.

11. The system of claim 10, further comprising: a calibration unit on the network side, configured to determine that the UE has correctly received the E-AGCH when the network side receives the E-PUCH and the CRC result is correct, and apply the TPC command word to a closed loop quantity P maintained by the network side_e-baseCarrying out calibration; when the network side does not receive the E-PUCH, the network side judges that the UE does not correctly receive the E-AGCH and keeps the closed loop quantity P maintained by the network side_e-baseAnd is not changed.