CN101132228B - Method and terminal for ascending synchronous control in HSDPA system - Google Patents
Method and terminal for ascending synchronous control in HSDPA system Download PDFInfo
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Abstract
This invention discloses a method of up-line synchronous control in a HSDPA system, which compares HS-SCCH channel with a down-line accompany DPCH channel of two down line channels, when the discontinuous time interval of one is long, it carries out up-line synchronous control reference to the time ahead of another up-line channel to get a better up-line control result, in this way, when using a same emission power, it increases the performance of the HS-SICH or accompany DPCH so as to increase the control to HS-PDSCH service channels and throughput of the HSDPA sytem.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and a terminal for uplink synchronization control in High Speed Downlink Packet Access (HSDPA).
Background
HSDPA is an enhancement scheme proposed by 3GPP Release5, and is applicable to WCDMA and TD-SCDMA systems, where the main objective of HSDPA is to support packet data services at high speed, and obtain lower time delay, higher system throughput capacity, and more powerful Qos guarantee under the condition of high data transmission rate requirement.
In HSDPA, a High Speed Downlink Shared Channel (HS-DSCH) is used for data transmission, and a plurality of UEs share the Channel by time division multiplexing and code division multiplexing, and may be mapped to one or more Physical channels, where the Physical Channel is a High Speed Physical Downlink Shared Channel (HS-PDSCH). In order to realize fast Control, the HS-DSCH uses a Shared Control Channel (HS-SCCH) as its dedicated downlink Control Channel to carry Control Information of the HS-DSCH, and uses a High Speed Shared Information Channel (HS-SICH) as its dedicated uplink Control Channel to feed back downlink quality Information for the base station and respond to the transport block. Meanwhile, there is a pair of uplink and downlink associated physical channels (DPCHs) for transmitting control information such as Radio Resource Control (RRC) signaling, and may also support transmission of some services, such as voice service and data service.
The HS-DSCH channel is a shared channel, and a plurality of users must share the resources occupied by the HS-DSCH to transmit services, so that each user needs to be scheduled in a time-sharing manner according to a certain criterion, and thus the HS-DSCH channel of the same user is usually transmitted discontinuously, and corresponding HS-SCCH and HS-SICH control channels are also under the condition that continuous control cannot be obtained. For TD-SCDMA system, HS-SICH is used as control channel, and the requirement for demodulation performance is generally higher than that of traffic channel, so the requirement for synchronization effect in uplink synchronization is higher. The synchronous control performance of HS-SICH is an important guarantee for the correct demodulation of the channel, is very important for guaranteeing the receiving performance of HS-SICH, and plays a non-negligible role in the overall system performance of HSDPA.
The following takes the HS-SICH channel as an example to briefly describe the existing synchronization control technique of the discontinuous transmission channel:
firstly, determining the transmission starting time T of the first HS-SICH channelTX。
TTX＝TRX-HS-SICH-TA (1)
Wherein, TA is timing advance, referring to timing advance of the UE accompanied DPCH; t isRX-HS--SICHThe assumed (assumed) receiving time of HS-SICH is used as the reference time of transmission, and the assumed receiving time can be expressed as m in the number of the time slot where the assumed receiving time is located, and m is greater than 0
TRX-HS--SICH＝m×864×TC+352×TC (2)
Wherein T isCIs a time of one chip (chip).
And secondly, realizing uplink closed-loop synchronous control. The method specifically comprises the following steps:
in normal uplink closed-loop synchronization control, a base station (Node B) generates a synchronization adjustment command (SS) according to received information of an HS-SICH and transmits a command word to UE through the HS-SCCH. And the UE adjusts the timing advance value (TA) of the HS-SICH according to the demodulated command. And the step size k (1-8)1/8chip of the synchronization adjustment and the parameter M (1-8 subframes) are specified by a high layer, where M represents the number of subframes.
For the UE, the TA needs to be adjusted when the following equation (3) holds:
SFN′mod M＝0 (3)
the SFN is a system frame number of the subframe. Before that, the UE needs to receive the SS commands of M consecutive subframes, and combine all the SS commands controlling the subframes together to perform a comprehensive determination. Is calculated by the formula
Wherein, i is 0, 1, which respectively represents the serial numbers of two bits of an SS command, N is the number of SS commands carried by each subframe, and k is the serial number of the kth subframe in M subframes received continuously; j is the jth SS command word sequence number in the kth sub-frame, bi，j，kFor the ith bit of the kth sub-frame and jth SS command word,
the combined result of each bit of the SS command word of M sub-frames received continuously. If NM is more than 1, judging the merged result again to obtain the final synchronous control command word:
let SS be [ b ]0，b1]If NM is 1, SS is the result of hard decision, and the current TA value should be calculated according to the following equation (5):
then, determining the next HS-SICH transmission time:
TTX＝TRX-HS-SICH-TA’ (6)
wherein TA' in the formula (6) is TA obtained by calculation of the formula (5).
Thus, synchronous control is realized.
A brief description will be given below regarding time-sharing scheduling of the UE.
When time-sharing dispatching is carried out, the HS-SICH and the HS-SCCH channels are not sent continuously, and the Node B generates a synchronous adjusting command SS according to the received timing of the HS-SICH and carries the synchronous adjusting command SS to the UE when the next effective HS-SCCH channel is transmitted. And the UE performs uplink synchronization control according to the received SS, and does not adjust the time lead if the UE does not receive the SS.
Due to the characteristics of HSDPA technology, the probability that UE is time-sharing scheduled is very high, which indicates that the situation that the transmission of HS-SICH and HS-SCCH channels is discontinuous often occurs, under the situation, HS-SCCH cannot timely feed back a synchronization adjustment command SS generated by a Node B according to the received timing of the HS-SICH channels to the UE, the UE does not adjust the time lead when the UE does not receive the SS, thus the uplink synchronization control of the HS-SICH brings discontinuity, at this time, if the time delay of the UE obtaining SS command words is too long, the timing of the UE cannot be timely adjusted, the uplink synchronization deviation can be brought, the deviation is increased along with the increase of the discontinuous scheduling time, the demodulation performance of a control channel in the HSDPA can be seriously influenced, the base station can not correctly receive feedback information, and the system throughput can be reduced.
Disclosure of Invention
The invention aims to solve the technical problem that no matter how long the time interval for sending the synchronous adjustment command is, the synchronous control adjustment can be carried out in time, thereby improving the performance of the whole system.
In order to solve the technical problem, the technical scheme of the invention comprises the following steps:
a method for realizing uplink synchronous control in HSDPA system is based on high speed downlink packet access HSDPA technique, including:
when a first channel transmission interval received by a user terminal UE side is smaller than a third channel transmission interval, determining a time lead for carrying out synchronous control according to a second channel, and adjusting the time lead of a fourth channel according to the time lead to obtain the transmitting time of the fourth channel so as to realize synchronous control; wherein, the first channel is a downlink associated physical channel (DPCH); the second channel is an uplink associated physical channel (DPCH); the third channel is a shared control channel HS-SCCH; the fourth channel is a high-speed shared indication channel HS-SICH; or, the first channel is a shared control channel HS-SCCH; the second channel is a high-speed shared indication channel HS-SICH; the third channel is a downlink associated physical channel (DPCH); the fourth channel is an uplink associated channel DPCH.
And when the first channel transmission interval received by the UE side is greater than or equal to the third channel transmission interval, adjusting the time lead of the fourth channel by using a synchronization adjustment command SS carried by the third channel to obtain the transmitting time of the fourth channel, thereby realizing synchronization control.
If the second channel and the fourth channel are located in the same timeslot, the method for determining the timing advance for performing synchronization control includes: and extracting the time advance of the second channel, and directly using the time advance as the time advance for carrying out synchronization control.
If the second channel and the fourth channel are located in different time slots, the method for determining the timing advance for performing synchronization control includes: and extracting the time lead of the second channel, subtracting the target value offset of the synchronization peak of the second channel and the fourth channel by using the time lead, and taking the obtained difference as the time lead for carrying out synchronization control.
The method for determining the target value offset of the synchronization peak of the second channel and the fourth channel comprises the following steps:
ceil (P/midamble _ K)/3)Second channel-ceil(floor(P/midamble_K)/3)The fourth channel；
Wherein ceil is subjected to upper rounding, floor is subjected to lower rounding; the midamble _ K is a parameter for calculating the channel estimation window length when the high-level configuration adopts the midamble code to perform channel estimation, and P is the period of the midamble code.
The first channel is a downlink associated physical channel (DPCH); the second channel is an uplink associated physical channel (DPCH); the third channel is a shared control channel HS-SCCH; when the fourth channel is a high speed shared indicator channel HS-SICH, the method further includes: and if the time interval of the current HS-SCCH of the base station end relative to the HS-SCCH sent last time exceeds the time interval of the downlink associated DPCH, fixedly filling information for indicating non-operation in the SS field of the original filling synchronous adjustment command in the current HS-SCCH.
The first channel is a shared control channel HS-SCCH; the second channel is a high-speed shared indication channel HS-SICH; the third channel is a downlink associated physical channel (DPCH); when the fourth channel is an uplink associated channel DPCH, the method further includes: and if the time interval of the current downlink accompanying DPCH of the base station end exceeds the HS-SCCH time interval relative to the time interval of the downlink accompanying DPCH sent last time, fixedly filling information for indicating non-operation in an SS field of the synchronization adjustment command filled in the current downlink accompanying DPCH.
A terminal is applied to a high-speed downlink packet access system, and comprises a device for comparing the received downlink channel transmission interval, referring to the uplink synchronization parameter of the uplink channel corresponding to the downlink channel with a small transmission interval, and adjusting the time advance of the subsequent uplink channel to realize synchronization control; the downlink channel is a downlink associated physical channel DPCH and a shared control channel HS-SCCH, the uplink channel is an uplink associated physical channel DPCH, and the subsequent uplink channel is a shared indication channel HS-SICH; the uplink synchronization parameter refers to the time advance of an uplink associated DPCH channel; or, the downlink channel is a downlink associated physical channel DPCH and a shared control channel HS-SCCH, the uplink channel is a shared indication channel HS-SICH, and the subsequent uplink channel is an uplink associated DPCH; the uplink synchronization parameter refers to the time advance of the HS-SICH channel.
The downlink channel is a downlink associated physical channel DPCH and a shared control channel HS-SCCH, the uplink channel is an uplink associated physical channel DPCH, and the subsequent uplink channel is a shared indication channel HS-SICH; the uplink synchronization parameter refers to the time advance of an uplink associated DPCH channel; and when the transmission interval of the downlink associated DPCH is smaller than the transmission interval of the HS-SCCH, performing uplink synchronous control on the HS-SICH according to the time advance of the channel of the uplink associated DPCH.
The downlink channel is a downlink associated physical channel DPCH and a shared control channel HS-SCCH, the uplink channel is a shared indication channel HS-SICH, and the subsequent uplink channel is an uplink associated DPCH; when the uplink synchronous parameter refers to the time advance of the HS-SICH channel; and when the transmission interval of the downlink associated DPCH is larger than or equal to the transmission interval of the HS-SCCH, performing uplink synchronous control on the uplink associated DPCH according to the HS-SICH time advance.
A terminal is applied to a high-speed downlink packet access system, and comprises a device for comparing the received downlink channel transmission interval and adjusting the time advance of a subsequent uplink channel by adopting a synchronous adjustment command of a downlink channel with a small transmission interval to realize synchronous control;
the downlink channel is a downlink associated physical channel DPCH and a shared control channel HS-SCCH, the uplink channel is an uplink associated physical channel DPCH, and the subsequent uplink channel is a shared indication channel HS-SICH; or, the downlink channel is a downlink associated physical channel DPCH and a shared control channel HS-SCCH, the uplink channel is a shared indication channel HS-SICH, and the subsequent uplink channel is an uplink associated DPCH.
When the downlink channel is a downlink associated physical channel DPCH and a shared control channel HS-SCCH, the uplink channel is an uplink associated physical channel DPCH, and the subsequent uplink channel is a shared indication channel HS-SICH; and when the transmission interval of the downlink accompanying DPCH is larger than or equal to the transmission interval of the HS-SCCH, determining the time lead of synchronous control according to the synchronous control command of the HS-SCCH, and performing uplink synchronous control on the HS-SICH.
When the downlink channel is a downlink associated physical channel DPCH and a shared control channel HS-SCCH, the uplink channel is a shared indication channel HS-SICH, and the subsequent uplink channel is an uplink associated DPCH; and when the transmission interval of the downlink associated DPCH is smaller than the transmission interval of the HS-SCCH, determining the time lead of the synchronous control according to the synchronous control command of the downlink associated DPCH, and performing uplink synchronous control on the uplink associated DPCH.
The key of the invention is that when the discontinuous time interval of two downlink channels (HS-SCCH channel and downlink associated DPCH channel) is larger, the uplink synchronous control effect of the uplink channel (HS-SICH or uplink associated DPCH channel) corresponding to the downlink channel with reference to SS synchronous command word obtained from the downlink channel is worse, at this time, the uplink synchronous control can be carried out with reference to the time advance of the other uplink channel, thereby obtaining better uplink synchronous control effect, and when the same transmitting power is used, the performance of HS-SICH or associated DPCH is improved, thereby improving the control effect of HS-PDSCH service channel, and relatively improving the throughput of HSDPA system. The deviation of uplink synchronization caused by overlarge time interval for sending the synchronization adjustment command is avoided. The invention is simple to realize, convenient to apply and has good compatibility with the prior art.
Drawings
FIG. 1 is a flow diagram illustrating the synchronous control of HS-SICH according to an embodiment of the present invention;
fig. 2 is a schematic diagram of time interval distribution of HSDPA channels.
Detailed Description
The key point of the invention is that for HSDPA system, when the transmission interval of the first channel received by the user terminal (UE) side is smaller than the transmission interval of the third channel, the time lead used for carrying out synchronous control is determined according to the second channel, and the time lead of the fourth channel is adjusted according to the time lead to realize synchronous control; and when the first channel transmission interval received by the UE side is greater than or equal to the third channel transmission interval, a synchronization adjustment command SS carried by the third channel is applied to adjust the time lead of the fourth channel, so as to realize synchronization control. Wherein, the first channel is a downlink associated DPCH, the second channel is an uplink associated DPCH, the third channel is an HS-SCCH, and the fourth channel is an HS-SICH; or, the first channel is HS-SCCH, the second channel is HS-SICH, the third channel is downlink associated DPCH, and the fourth channel is uplink associated DPCH. That is, the uplink synchronization of the HS-SICH channel may be controlled with reference to the timing advance of the uplink associated DPCH channel, or the uplink associated DPCH channel may be synchronously controlled with reference to the timing advance of the HS-SICH channel.
It can be understood that, when there are multiple discontinuous transmission channels at the UE end, if the time intervals of the channels are different and the effect of performing uplink synchronization control independently is also different, the longer the time interval is, the worse the synchronization control effect is, so that the uplink synchronization time of several different channels can be obtained according to the channel with the best synchronization control effect.
Considering the characteristics of HSDPA, a pair of uplink and downlink associated DPCH channels is always present in the UE from the beginning of accessing the HSDPA service to the end of the HSDPA service, and is used to transmit control information such as RRC signaling, measurement report, and the like, and may also support the transmission of some non-enhanced services of the R4 version, such as voice services, data services, and the like. There are two cases accompanying the existence of DPCH, continuous transmission and discontinuous transmission. And for the HS-SICH channel, it is also paired with the HS-SCCH channel. The processing of the uplink synchronization control during the continuous transmission of the HS-SICH and the HS-SCCH is consistent with the existing control process, and is not described in detail here. Only the case where HS-SICH and HS-SCCH are not continuous will be described in detail below.
The following description will be made by taking the control of HS-SICH as an example. Referring to fig. 1:
first, step 101 is executed to determine the transmission start time of the first HS-SICH channel.
The specific method is the same as formula (1), and is not described herein again.
And secondly, realizing uplink closed-loop synchronous control. The method specifically comprises the following steps:
This can be done because the shorter the transmission interval, the better the effect of the synchronization control will be, and therefore at PeriodDP CH＜PeriodHS-SCCHIn this case, because the HS-SICH and the HS-SCCH are not continuous, the uplink synchronization control effect of the HS-SICH performed by using the SS control command word carried by the HS-SCCH at the UE end is relatively worse than the associated DPCH, and when the transmission interval of the HS-SCCH channel is larger, the control effect is worse, the performance is seriously deteriorated, and serious misadjustment will cause the result of step loss.
If the uplink associated DPCH channel and the HS-SICH channel are located in the same timeslot, the method for determining the timing advance for performing synchronization control includes: the timing advance accompanying the DPCH is extracted and directly used as the timing advance for performing synchronization control.
If the uplink associated DPCH channel and the HS-SICH channel are located in different time slots, the method for determining the timing advance for performing synchronization control includes: and extracting the channel time advance of the uplink associated DPCH, subtracting the target value offset of the synchronization peak of the uplink associated DPCH and the HS-SICH from the channel time advance, and taking the obtained difference as the time advance for performing synchronization control.
The method for calculating the offset of the synchronous peak target value of the uplink associated DPCH and the HS-SICH comprises the following steps:
ceil(floor(P/midamble_K)/3)DPCH-ceil(floor(P/midamble_K)/3)HS-SICHformula (5)
Wherein ceil is subjected to upper rounding, floor is subjected to lower rounding; p128 is the midamble code period, and midamble _ K is a parameter for calculating the channel estimation window length when channel estimation is performed by using the midamble code configured by the higher layer. The Midamble code is a set of training sequences used by the TDD system for channel estimation. floor (P/midamble _ K) is the channel estimation window length, which is an integer; ceil (P/midamble _ K)/3) is the location of window length 1/3, which is also an integer.
However, if the associated DPCH channel and the HS-SICH channel are located in different timeslots, midamble _ K configured for them by the higher layer respectively may be different, and therefore, the synchronization peak position target value may be shifted when performing uplink synchronization control.
Furthermore, if the time interval of the current HS-SCCH at the base station end relative to the HS-SCCH sent last time exceeds the time interval of the downlink associated DPCH, it can be considered that the SS command word carried in the HS-SCCH at this time cannot accurately adjust the synchronization position of the HS-SICH, and therefore, information for indicating non-operation, such as "donothing" is fixedly filled in the SS field in which the synchronization adjustment command is originally filled in the current HS-SCCH.
Therefore it is provided withThis is done because of PeriodDPCH≥eriodHS-SCCHAnd the shorter the transmission interval is, the better the effect of the synchronous control is, therefore, the better the uplink synchronous control of the HS-SICH refers to the SS command word carried by the HS-SCCH channel, so the UE only needs to adjust the HS-SICH according to the SS command word carried by the HS-SCCH channel. At the moment, the SS command word carried by the HS-SCCH of the base station end is obtained according to the detected HS-SICH. That is, the synchronization control implementation in this case is exactly the same as that in the related art.
Step 105, determining the next HS-SICH transmission time according to the determined time advance for synchronous control:
TTX＝TRX-HS-SICH-TA” (7)
wherein, TA "is the timing advance for synchronization control obtained by the method of the present invention.
Thus, synchronous control is realized.
The following describes the uplink synchronization control of the HS-SICH channel with reference to fig. 2.
In fig. 2, blank boxes represent sub-frames,
on behalf of the downlink with the DPCH,
on behalf of the HS-SCCH,
represents HS-SICH. And assuming that the time T1 is the time when the UE transmits the HS-SICH after receiving the correct HS-SCCH for the first time, knowing that the transmission time of the HS-SICH is obtained by referring to the time advance of the uplink associated DPCH according to the initialization rule. Thereafter, at times T2 and T3, the UE receives the correct HS-SCCH again, and the time interval of the HS-SCCH is TSCCH，15 sub-frames, and the downlink in this period is accompanied by DPCH timeInterval tDPCHIs 6 sub-frames, so the subsequent HS-SICH determines the transmission time by referring to the SS command word carried by the HS-SCCH, and realizes synchronous control. At time T4 and T5, the UE receives the correct HS-SCCH, but the time interval of the HS-SCCH is TSCCH，2And when the current downlink associated DPCH time interval is less than 6 sub-frames, the HS-SICH determines the transmission time by directly referring to the time advance of the current uplink associated DPCH, so that the synchronous control is realized.
When the uplink associated DPCH is referred to adjust the uplink synchronous control of the HS-SICH, two quantities can be referred to, namely the time advance of the uplink associated DPCH or the SS synchronous control command word carried by the downlink associated DPCH. This is because the outer-loop synchronization control of the uplink associated DPCH and the HS-SICH are independent from each other, and after the outer-loop synchronization adjustment, the offset between the synchronization peak target values of the two channels is not caused by different midamble _ K alone, and also includes the deviation of the outer-loop synchronization control, so that when the time interval between the HS-SICH channel and the HS-SCCH channel is large, the adjustment time timing offset according to the SS command word carried by the downlink associated DPCH may be opposite to the synchronization offset trend of the HS-SICH, resulting in that the more the HS-SICH channel adjusts the synchronization offset, the larger the synchronization error brought by referring to the SS command word carried by the downlink associated DPCH will be. Therefore, the timing advance of the uplink associated DPCH is directly referred to, the HS-SICH synchronization error can be ensured to be as small as possible, and the realization is relatively simple.
In the above, the synchronization adjustment of the HS-SICH is performed by referring to the timing advance of the uplink associated DPCH as an example, in practical application, the synchronization adjustment of the uplink associated DPCH may also be performed by referring to the timing advance of the HS-SICH, and a specific implementation method is the same as that described above, and only briefly described below.
And when the time interval of the downlink accompanying DPCH received by the UE is larger than or equal to the HS-SCCH time interval, determining the time advance for carrying out synchronous control by referring to the time advance of the HS-SICH, and determining the timing advance of an uplink accompanying DPCH channel according to the time advance for carrying out synchronous control.
If the uplink associated DPCH channel and the HS-SICH channel are located in the same timeslot, the method for determining the timing advance for performing synchronization control includes: and extracting the timing advance of the HS-SICH, and directly using the timing advance as the timing advance for carrying out synchronous control.
If the uplink associated DPCH channel and the HS-SICH channel are located in different time slots, the method for determining the timing advance for performing synchronization control includes: and extracting the time lead of the HS-SICH, subtracting the target value offset of the synchronization peak of the HS-SICH and the uplink associated DPCH from the time lead of the HS-SICH, and taking the obtained difference as the time lead for performing synchronization control.
The method for calculating the offset of the synchronous peak target value of the uplink associated DPCH and the HS-SICH comprises the following steps:
ceil(floor(P/midamble_K)/3)HS-SICH-ceil(floor(P/midamble_K)/3)DPCHformula (8)
The meaning of each parameter in the above formula (8) is the same as that in the formula (5), and is not described herein again.
Furthermore, if the time interval of the current downlink accompanying DPCH of the base station exceeds the HS-SCCH time interval with respect to the time interval of the downlink accompanying DPCH transmitted last time, it may be considered that the SS command word carried in the downlink accompanying DPCH of this time cannot accurately adjust the synchronization position of the uplink accompanying DPCH, and therefore, information indicating that the downlink accompanying DPCH is not used, such as "do nothing" is fixedly filled in the SS field of the original synchronization adjustment command filled in the current downlink accompanying DPCH.
When the time interval of the downlink associated DPCH received by the UE is smaller than the HS-SCCH time interval, the UE still performs processing according to the existing implementation mode, namely, the time lead for performing synchronous control is determined by referring to an SS command word carried by the downlink associated DPCH channel so as to perform synchronous control adjustment on the uplink associated DPCH channel.
And then, determining the transmission time of the next uplink associated DPCH according to the determined time advance for performing synchronization control, which is the same as the specific process described in equation (7).
The invention also discloses two terminals, which are applied to a high-speed downlink packet access system, wherein,
a terminal UE comprises a device for comparing the received transmission interval of the downlink channel, referring to the uplink synchronization parameter of the uplink channel corresponding to the downlink channel with a small transmission interval, adjusting the time advance of the subsequent uplink channel and realizing the synchronization control.
The downlink channel is a downlink associated physical channel DPCH and a shared control channel HS-SCCH, the uplink channel is an uplink associated physical channel DPCH, and the subsequent uplink channel is a shared indication channel HS-SICH; the uplink synchronization parameter refers to the time advance of an uplink associated DPCH channel; when the transmission interval of the downlink associated DPCH is smaller than the transmission interval of the HS-SCCH, performing uplink synchronous control on the HS-SICH according to the time advance of an uplink associated DPCH channel; or,
the downlink channel is a downlink associated physical channel DPCH and a shared control channel HS-SCCH, the uplink channel is a shared indication channel HS-SICH, and the subsequent uplink channel is an uplink associated DPCH; and the uplink synchronization parameter refers to the time lead of the HS-SICH channel, and when the transmission interval of the downlink associated DPCH is greater than or equal to the transmission interval of the HS-SCCH, the uplink associated DPCH is subjected to uplink synchronization control according to the HS-SICH time lead.
And the other terminal UE comprises a device for comparing the received downlink channel transmission interval and adopting the synchronous adjustment command of the downlink channel with small transmission interval to adjust the time lead of the subsequent uplink channel so as to realize synchronous control.
The downlink channel is a downlink associated physical channel DPCH and a shared control channel HS-SCCH, the uplink channel is an uplink associated physical channel DPCH, and the subsequent uplink channel is a shared indication channel HS-SICH; and when the transmission interval of the downlink accompanying DPCH is larger than or equal to the transmission interval of the HS-SCCH, determining the time lead of synchronous control according to the synchronous control command of the HS-SCCH, and performing uplink synchronous control on the HS-SICH. Or,
the downlink channel is a downlink associated physical channel DPCH and a shared control channel HS-SCCH, the uplink channel is a shared indication channel HS-SICH, and the subsequent uplink channel is an uplink associated DPCH; and when the transmission interval of the downlink associated DPCH is smaller than the transmission interval of the HS-SCCH, determining the time lead of the synchronous control according to the synchronous control command of the downlink associated DPCH, and performing uplink synchronous control on the uplink associated DPCH.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (13)
1. A method for uplink synchronous control in a High Speed Downlink Packet Access (HSDPA) system is characterized by comprising the following steps:
and when the user terminal UE determines that the received first channel transmission interval is smaller than the third channel transmission interval, determining the time lead for carrying out synchronous control according to the second channel, and adjusting the time lead of the fourth channel according to the time lead to obtain the transmitting time of the fourth channel so as to realize synchronous control.
Wherein, the first channel is a downlink associated physical channel (DPCH); the second channel is an uplink associated physical channel (DPCH); the third channel is a shared control channel HS-SCCH; the fourth channel is a high-speed shared indication channel HS-SICH; or, the first channel is a shared control channel HS-SCCH; the second channel is a high-speed shared indication channel HS-SICH; the third channel is a downlink associated physical channel (DPCH); the fourth channel is an uplink associated physical channel (DPCH).
2. The method of claim 1, further comprising: and when the user terminal UE determines that the received first channel transmission interval is greater than or equal to the third channel transmission interval, the synchronization adjustment command SS carried by the third channel is applied to adjust the time lead of the fourth channel to obtain the transmitting time of the fourth channel, so as to realize synchronization control.
3. The method of claim 1, wherein if the second channel and the fourth channel are located in the same timeslot, the method for determining the timing advance for synchronization control comprises: and extracting the time advance of the second channel, and directly using the time advance as the time advance for carrying out synchronization control.
4. The method of claim 1, wherein if the second channel and the fourth channel are located in different time slots, the method for determining the timing advance for synchronization control comprises: and extracting the time lead of the second channel, subtracting the target value offset of the synchronization peak of the second channel and the fourth channel by using the time lead, and taking the obtained difference as the time lead for carrying out synchronization control.
5. The method of claim 4, wherein the synchronization peak target value offset of the second channel and the fourth channel is determined by:
ceil (P/midamble _ K)/3)Second channel-ceil(floor(P/midamble_K)/3)The fourth channel；
Wherein ceil is subjected to upper rounding, floor is subjected to lower rounding; the midamble _ K is a parameter for calculating the channel estimation window length when the high-level configuration adopts the midamble code to perform channel estimation, and P is the period of the midamble code.
6. The method of claim 1, wherein the first channel is a downlink associated physical channel (DPCH); the second channel is an uplink associated physical channel (DPCH); the third channel is a shared control channel HS-SCCH; when the fourth channel is a high speed shared indicator channel HS-SICH, the method further includes: and if the time interval of the current shared control channel HS-SCCH of the base station end relative to the shared control channel HS-SCCH sent last time exceeds the DPCH time interval of the downlink accompanying physical channel, fixedly filling information for indicating non-operation in the SS field of the original filling synchronous adjustment command in the current shared control channel HS-SCCH.
7. The method according to claim 1, wherein the first channel is a shared control channel HS-SCCH; the second channel is a high-speed shared indication channel HS-SICH; the third channel is a downlink associated physical channel (DPCH); when the fourth channel is an uplink associated physical channel DPCH, the method further includes: and if the time interval of the current downlink associated physical channel DPCH of the base station end exceeds the time interval of the shared control channel HS-SCCH relative to the time interval of the downlink associated physical channel DPCH sent last time, fixedly filling information for indicating non-operation in the SS field of the synchronization adjustment command filled in the current downlink associated physical channel DPCH.
8. A terminal is applied to a high-speed downlink packet access system, and is characterized in that:
the terminal comprises a device for comparing the received downlink channel transmission interval, referring to the uplink synchronization parameter of the uplink channel corresponding to the downlink channel with a small transmission interval, and adjusting the time advance of the subsequent uplink channel to realize synchronization control;
the downlink channel is a downlink associated physical channel DPCH and a shared control channel HS-SCCH, the uplink channel is an uplink associated physical channel DPCH, and the subsequent uplink channel is a high-speed shared indication channel HS-SICH; the uplink synchronous parameter refers to the time lead of an uplink associated physical channel DPCH channel; or, the downlink channel is a downlink associated physical channel DPCH and a shared control channel HS-SCCH, the uplink channel is a high-speed shared indication channel HS-SICH, and the subsequent uplink channel is an uplink associated physical channel DPCH; the uplink synchronous parameter refers to the time advance of the HS-SICH channel of the high-speed shared indication channel.
9. The terminal of claim 8, wherein: the downlink channel is a downlink associated physical channel DPCH and a shared control channel HS-SCCH, the uplink channel is an uplink associated physical channel DPCH, and the subsequent uplink channel is a high-speed shared indication channel HS-SICH; the uplink synchronous parameter refers to the time advance of the uplink associated physical channel DPCH channel; and when the transmission interval of the downlink associated physical channel DPCH is smaller than the transmission interval of the shared control channel HS-SCCH, performing uplink synchronous control on the high-speed shared indication channel HS-SICH according to the time advance of the uplink associated physical channel DPCH.
10. The terminal of claim 8, wherein: the downlink channel is a downlink associated physical channel DPCH and a shared control channel HS-SCCH, the uplink channel is a high-speed shared indication channel HS-SICH, and the subsequent uplink channel is an uplink associated physical channel DPCH; the uplink synchronous parameter refers to the time advance of the high-speed shared indication channel HS-SICH; and when the transmission interval of the downlink associated physical channel DPCH is larger than or equal to the transmission interval of the shared control channel HS-SCCH, performing uplink synchronous control on the uplink associated physical channel DPCH according to the high-speed shared indication channel HS-SICH time advance.
11. A terminal is applied to a high-speed downlink packet access system, and is characterized in that:
the terminal comprises a device for comparing the received transmission interval of the downlink channel, adopting the synchronous adjustment command of the downlink channel with small transmission interval to adjust the time lead of the subsequent uplink channel and realize synchronous control;
the downlink channel is a downlink associated physical channel DPCH and a shared control channel HS-SCCH, the uplink channel is an uplink associated physical channel DPCH, and the subsequent uplink channel is a high-speed shared indication channel HS-SICH; or, the downlink channel is a downlink associated physical channel DPCH and a shared control channel HS-SCCH, the uplink channel is a high-speed shared indication channel HS-SICH, and the subsequent uplink channel is an uplink associated physical channel DPCH.
12. The terminal of claim 11, wherein: when the downlink channel is a downlink associated physical channel DPCH and a shared control channel HS-SCCH, the uplink channel is an uplink associated physical channel DPCH, and the subsequent uplink channel is a high-speed shared indication channel HS-SICH; and when the transmission interval of the downlink associated physical channel DPCH is larger than or equal to the transmission interval of the shared control channel HS-SCCH, determining the time lead of synchronous control according to the synchronous control command of the shared control channel HS-SCCH, and performing uplink synchronous control on the high-speed shared indication channel HS-SICH.
13. The terminal of claim 11, wherein: when the downlink channel is a downlink associated physical channel DPCH and a shared control channel HS-SCCH, the uplink channel is a high-speed shared indication channel HS-SICH, and the subsequent uplink channel is an uplink associated physical channel DPCH; and when the transmission interval of the downlink associated physical channel DPCH is smaller than the transmission interval of the shared control channel HS-SCCH, determining the time lead of synchronous control according to the synchronous control command of the downlink associated physical channel DPCH, and performing uplink synchronous control on the uplink associated physical channel DPCH.
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| CN101272180B (en) * | 2008-05-13 | 2011-05-18 | 北京天碁科技有限公司 | Indication method for ascending synchronous establishing command in TD-SCDMA system |
| CN101674658B (en) * | 2008-09-12 | 2011-11-30 | 中兴通讯股份有限公司 | Application method of space division multiplexing of high-speed downlink packet access system |
| CN101388722B (en) * | 2008-11-03 | 2013-06-26 | 新邮通信设备有限公司 | A method for uplink synchronization control, base station and user equipment |
| CN101404562B (en) * | 2008-11-20 | 2011-06-29 | 中国移动通信集团设计院有限公司 | A rate adjustment method, system and device accompanied by a dedicated physical control channel |
| RU2503152C2 (en) | 2009-04-24 | 2013-12-27 | Хуавэй Текнолоджиз Ко., Лтд. | Uplink synchronsation method and apparatus |
| CN101902809B (en) * | 2009-05-31 | 2013-04-03 | 电信科学技术研究院 | Method and device for controlling downlink power |
| CN102421125B (en) * | 2011-09-28 | 2014-08-13 | 展讯通信（上海）有限公司 | Mobile terminal, method and device for judging and regulating uplink synchronization abnormity |
| CN103067949B (en) * | 2011-10-18 | 2015-08-05 | 鼎桥通信技术有限公司 | The uplink synchronous abnormality eliminating method of TD-SCDMA and base station |
| CN104254100B (en) * | 2013-06-25 | 2017-12-15 | 普天信息技术研究院有限公司 | A kind of measuring method of uplink timing advance |
| CN108135029A (en) * | 2017-12-21 | 2018-06-08 | 深圳地空互联技术有限公司 | A kind of method, apparatus and system applied to high-speed mobile communications |
| CN109104763B (en) * | 2018-09-30 | 2021-01-15 | 成都精位科技有限公司 | Synchronization signal control method and device |
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