CN101031098A - High-speed down packet accessing method for supporting medium-low speed data user in TD-SCDMA - Google Patents
High-speed down packet accessing method for supporting medium-low speed data user in TD-SCDMA Download PDFInfo
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Abstract
The method comprises: 3GPP introduces HSDPA (high speed downlink packet access) from the HSDPA, Release 5 to make the HSDPA user capable of using A-DCH channel to keep the downlink synchronization and to transmit RRC message; adding public synchronous signaling channel, and gathering SS signalings of all users in order to send them one public synchronous signaling channel; loading the SS signalings on the public synchronous channel after making a channel decoding for the SS signalings; changing the signaling transmission in A-DCH into signaling transmission in the public synchronous channel. The invention also provides a method for supporting mass middle and low rate user being loaded on single carrier in TD-SCDMA system.
Description
[technical field]
The present invention relates to support in third generation time division SCDMA (TD-SCDMA) system that a large amount of middle low speed data users' high speed downlink packet inserts the method for (HSDPA), more specifically, relate to the system and method that wherein down high speed grouping inserts.
[background technology]
3GPP has introduced high speed downlink packet access (HSDPA:High Speed Downlink PacketAccess) characteristic at the Release5 of 3G standard.Based on UMTS R4 framework, HSDPA increases the purpose of downlink capacity by introducing adaptive coding and modulating (AMC:Adaptive Modulation andCoding), mixing automatic repeat requests technology such as (HARQ:Hybrid Automatic Retransmission Request) and reached raising downlink grouping traffic speed.
Except introducing AMC and HARQ, HSDPA has introduced medium access control-high speed downlink packet access entity (MAC-hs) at medium access key-course (MAC) and has finished functions such as relevant scheduling, feedback and re-transmission, and the MAC-hs entity is arranged in Node B.Originally need can directly in Node B, carry out the control that information retransmits at network side.The HSDPA technology has been introduced high speed descending sharing channel (the High Speed Downlink Shared Channel of a transmitting user data in addition, HS-DSCH), introduced High-Speed Shared Control Channel (the High Speed Shared Control Channel for HS-DSCH of HSDPA special use in physical layer, HS-SCCH) and the high-speed shared information channel of HSDPA special use (High Speed Shared Information Channel for HS-DSCH, HS-SICH), directly finish information interaction between user terminal (UE) and the NodeB fast.In addition, HSDPA also needs a dedicated channel of following (A-DCH) command transmitting information when using the HS-DSCH channel transmission data, and keep up synchronously.
Because HSDPA has introduced new channel HS-SCCH descending, HS-SICH and A-DCH, this has just inevitably increased the signaling consumption of system.This expense in HSDPA transmission during low speed data performance particularly outstanding.Be born though HSDPA is the original intention because of the high-speed data service of supporting small number of users, along with VoIP etc. a large amount of in the emerging in large numbers of low-speed data services, HSDPA has been necessary this new demand is improved accordingly.
[summary of the invention]
The present invention seeks to: provide a kind of in TDS-CDMA system, on single carrier frequency, support a large amount of in low speed data user's HSDPA (MU-HSDPA, Muti-User HSDPA) implementation method, adopt this method can effectively reduce the system signaling expense of introducing because of HSDPA, online number of users (each carrier frequency can be supported 48 Ireland at least) when supporting on the single carrier frequency of raising system.
The present invention seeks to realize like this: the method that low speed data users' high speed downlink packet inserted during support was a large amount of: the realization of low speed data user's HSDPA in TDS-CDMA system, on single carrier frequency, supporting in a large number, in the mobile communication system that is applied to form by base station and user terminal, the base station includes medium access control-high speed downlink packet and inserts entity (MAC-hs), adopts single or multiple carrier waves to carry out transfer of data between base station and the user terminal; 3GPP has introduced the high speed downlink packet access in the Release5 of 3G standard, be HSDPA, HSDPA user in the R5 standard utilizes the A-DCH channel to keep down-going synchronous and transmits RRC message, added the common synchronization signaling channel, all users' SS signaling is concentrated on a unified common synchronization signaling channel transmission, and the SS signaling carries out being carried on the common synchronization signaling channel after the chnnel coding; And change in the common synchronization channel and transmit, and change in the HS-DSCH channel and transmit being defined in the RRC message that transmits among the A-DCH in the R5 standard with being defined in the SS signaling of following dedicated channel A-DCH to transmit in the R5 standard.When UE set up the RRC connection, network was that each UE distributes a sync numbers, and notifies UE by RRC Connection Setup message with this sync numbers; Read corresponding oneself SS signaling in the corresponding code block that UE is carried from the CSSCH channel in each subframe subsequently after obtaining the sync numbers of oneself.
Release5 the present invention with respect to 3GPP has added the common synchronization signaling channel, so HSDPA user no longer relies on the SS signaling among the A-DCH to keep down-going synchronous, but all users' SS signaling is concentrated on a unified common synchronization signaling channel transmission; And change in the HS-DSCH channel and transmit being defined in the RRC message that transmits among the A-DCH in the R5 standard.In order to reduce the error rate of SS signaling, the SS signaling of carrying on the common synchronization signaling channel is carried out chnnel coding.
In addition the present invention on the basis of 3GPP R5 standard, added the modulation indicating channel (Modulation IndicationChannel, MICH).Utilize the modulation indicating channel to indicate in the current subframe which terminal transmitting data, and the modulation system of the HS-SCCH channel under these terminals.Feedback information corresponding to HS-SCCH also no longer transmits in HS-SICH, but has added a bed course between physical layer and MAC layer, utilizes this bed course to transmit ACK/NAK and CQI information.
The present invention has also compressed the form of HS-SCCH signaling in the 3GPP R5 standard; With all packets by service rate and whether retransmit and be divided three classes the packet of low speed (being lower than 16Kbps) New Development, packet of high speed New Development and retransmitted data packet; At these three kinds of different business corresponding HS-SCCH signaling has been carried out corresponding compression, other all data pairing HS-SCCH signaling of compression back except that data retransmission can utilize the code channel of a SF16 to transmit.
Feedback information corresponding to HS-SCCH also no longer transmits in HS-SICH, but has added a bed course between physical layer and MAC layer, utilizes this bed course to transmit ACK/NAK and CQI information.
Performing step of the present invention is:
(a1) terminal is set up and is called out when connecting, the subframe group number g at network side distributing terminals place, and the sign u of terminal in group;
(a2) which terminal use the assessment of the scheduler in NodeB different terminals user serves with the decision current TTI;
(a3) in case determine in given TTI, to need to provide service for certain terminal, NodeB needs the HS-DCSH parameter of identification necessity, such as operational numeral number, whether can use which capabilities limits is arranged on 16QAM, the terminal capability, the software memory length of terminal has been determined operable HARQ type;
(a4) NodeB is according to terminal iidentification u in the subframe group number g of the terminal that will serve in the current TTI and the group, and the modulation system of terminal is filled in the signaling information of modulation indicating channel;
(a5) NodeB begins to transmit the HS-SCCH signaling, transmits corresponding HS-DSCH data then;
(a6) the modulation indicating channel on the terminal monitoring time slot 0 reads the HS-SCCH signaling the corresponding code channel if modulation indicating channel indication current TTI has the HS-SCCH signaling that sends to this terminal from time slot 6;
(a7) in case terminal has received and understood the HS-SCCH signaling that sends to oneself, terminal just reads the also data of buffer memory HS-DSCH Channel Transmission from follow-up TTI;
(a8) terminal judges whether that according to the ARQ sequence number among the HS-SCCH needs merge the data in the buffer memory;
(a9) after in a single day the data that are combined were decoded, terminal was according to the result who the HS-DSCH data is carried out CRC check, in the special transmission piece transmission ACK/NACK indication of uplink direction by upstream data DCH.
Improvement of the present invention is: the present invention on the basis of 3GPP R5 standard, added the modulation indicating channel (ModulationIndication Channel, MICH).Utilize the MICH channel to indicate the HS-SCCH channel of which terminal in the current subframe to be in state of activation, and the modulation system that is in each user HS-SCCH channel of state of activation.The carrying of modulation indicating channel MIB (ModulationIndication Bitmap), UEI (UE Indicator) and three kinds of signalings of RTN (Re-Transmit Number).A modulation of each carrier frequency configuration indicating channel (MICH), this channel occupies sign indicating number that SF equals 16 on the time slot 0, adopts the QPSK modulation.The MICH burst is made up of 32bit information, the form of MICH channel such as Fig. 1, and the information of concrete MICH channel will be introduced in embodiment.
Among the present invention, the HS-SCCH channel of MICH channel indication is fixed on the time slot 6 of same subframe, and is arranged in next subframe time slot 6 descending time slot before by the determined HS-DSCH channel of HS-SCCH signaling.MICH, HS-SCCH have reached sequential relationship such as Fig. 2 of corresponding HS-DSCH channel.The hypothesis uplink and downlink respectively have three business time-slots among Fig. 2.The indicated HS-SCCH channel of MICH in the subframe of SFN=n is positioned at the time slot 6 of subframe n.And the indicated HS-DSCH channel of HS-SCCH channel is positioned at time slot 4 and the time slot 5 of subframe n+1 among the subframe n.
Further improvement of the present invention is: the present invention on the basis of 3GPP R5 standard, added the common synchronization signaling channel (CommonSynchronization Signaling Channel, CSSCH).The CSSCH channel will be introduced in embodiment.And the present invention has cancelled on the basis of 3GPP R5 standard and has followed dedicated channel (A-DCH).In the R5 standard, A-DCH is used for transmitting the SS signaling of RRC signaling and physical layer.Yet RRC message only just can transmit under situation seldom, from the angle of sign indicating number resource, for RRC message is reserved the waste that seems very of a code channel separately.The present invention has cancelled A-DCH, and the RRC message of UE is placed in the affiliated HS-DCSH channel of UE and sends, and the SS signaling of each UE is hit unified transmission the in the CSSCH channel.
Further improvement of the present invention is: the present invention has dosed two kinds of transformats in transmitting uplink data channel DCH, utilize a kind of transmission block of special use to transmit feedback information corresponding to HS-SCCH, these feedback informations comprise HARQ-Id, ACK/NAK and QualityIndicator.The form of concrete this transmission block will be introduced in embodiment.
Further improvement of the present invention is: the present invention has compressed the form of HS-SCCH signaling in the 3GPP R5 standard; With all packets by service rate and whether retransmit and be divided three classes the packet of low speed (being lower than 16Kbps) New Development, packet of high speed New Development and retransmitted data packet; These three kinds respectively corresponding three kinds of different HS-SCCH signaling formats of grouping.The form of the HS-SCCH signaling after simplifying will be introduced in embodiment.
Further improvement of the present invention is: all subframes are divided into four subframe groups according to the remainder of subframe numbers mould 4.Terminal iidentification u (span is [1,12]) constitutes a sign altogether to I in subframe group group number g and the group, and I=(g, u).Each terminal is distributed to the one or more signs of this terminal to I by the service rate of network based terminal when setting up the calling connection.Except that retransmission packet, the present invention no longer relies in the HS-SCCH signaling 16 UE-ID to distinguish different UE, but according to the sign of terminal I is determined terminal, and obtains the information relevant with this terminal in the MICH channel.
Compared with prior art, the present invention has the following advantages:
A. reduced signaling consumption
Signaling consumption at the HSDPA of 36PP R5 normalized definition is bigger.With uplink and downlink the example that is configured to of 3 time slots is arranged respectively, when the telephone traffic of single carrier frequency was 24 Ireland, A-DCH was 24, and HS-SCCH is at least 6, and the downlink signaling expense reaches 24+12/48=75%.So big signaling consumption can't carry user's data.And behind employing the present invention, same configuration down, and all users adopt the QPSK modulation system, when the telephone traffic of single carrier frequency was 48 Ireland, its downlink signaling expense was (3+12)/48=31.25%.The HS-SCCH signaling that wherein comprises CSSCH and 12 code channels of 3 code channels.If considering that UE can be in the time of half mourns in silence, and suppose that all users adopt 16QAM, then the system signaling expense only is (3+12/2/2)/48=14.58%.Adopt the HSDPA after this invention to reduce the overhead that brings because of the transmission of signaling greatly, improved the utilance of frequency spectrum.
B. reduced the error rate of SS
The SS signaling is not passed through any chnnel coding in TD-SCDMA, the judgement that therefore when signal to noise ratio is higher, can make a mistake, and UE adjusts according to the SS signaling of mistake, causes step-out easily.In the present invention, be dispersed in SS signaling on each physical channel and be concentrated in the CSSCH channel and send, and carried out chnnel coding.When signal to noise ratio is higher, greatly reduce the error rate, in case and signal to noise ratio when low UE examine error code singly can't error correction the time, just abandon the SS signaling in this subframe, thereby avoid because the step-out that wrong SS signaling causes.Adopt the Reel-Muller chnnel coding of (32,10) or (16,5) simultaneously, reduced as much as possible that UE reads the bit number that the SS signaling needs the CSSCH channel of parsing, the power consumption of having saved UE among the TTI.
C. reduced the percent of call lost
Among the HSDPA of 3GPP R5 standard, the shared code channel of HS-DSPCH channel is pre-configured, and more the time, HSDPA takies independent carrier frequency to arrange net.Therefore can't share a yard resource between the data service of speech business and HSDPA.When the sign indicating number resource of speech business is comparatively nervous, even if this moment HSDPA data traffic transmission speed lower, also can not share and cause call loss owing to the sign indicating number resource of speech business and HSDPA business.
And among the present invention, the speech business of low speed can be transmitted with HSDPA by VoIP, thereby speech business and data service are to share the sign indicating number resource.And the transmission rate of miscellaneous service can dynamically be adjusted, and data service can be adjusted its transmission speed, and speech business also can be adjusted its shared channel code by the code rate of adjusting AMR.Therefore as the bandwidth and the channel code of can preempting priority when the inserting lower business of higher priority business (switching), thereby reduce call loss and switch cutting off rate as voice.
D. time slot configuration more flexibly
The uplink and downlink timeslot of TD-SCDMA can dispose.Yet disturb for fear of up-downgoing, it is identical that the up-downgoing switching point of adjacent two co-frequency cells must be provided with.Yet simple speech business up-downgoing speed is symmetrical, and data service up-downgoing speed is asymmetric, therefore is difficult to all co-frequency cells are provided with a unified up-downgoing switching point.
And the invention enables the miscellaneous service that to support senior middle school's low speed of multichannel on the same carrier frequency simultaneously.The mixed transport of data service and speech business can make things convenient for the up-downgoing flexible configuration of time slot so that the transmission rate of up-downgoing reaches a suitable ratio.
E. cancelled the CS territory
What the invention enables HSDPA can come the support voice business by VoIP, thereby has realized the conversion of whole CS field to PS field on eating dishes without rice or wine.From then on core net needn't keep the equipment in CS territory again, thereby has reduced the maintenance cost in the operation.
[description of drawings]
Fig. 1 is the coded format figure of MICH channel.
Fig. 2 is the sequential chart of MICH channel, HS-SCCH channel and HS-DSCH channel.
Fig. 3 is the form 1 of the bed course that adds previously at MAC PDU.
Fig. 4 is the form 2 of the bed course that adds previously at MAC PDU.
Fig. 5 is a HS-DSCH code channel distribution diagram.Among this figure on each code channel target be the ID of UE, its account form is 4*g+u.The activation UE of current subframe comprises 25,27 among this figure, 28,31,35,36; The UE that is retransmitting comprises 1,4 and 13.SS1 and SS2 represent the CSSCH channel.On behalf of this code channel, '-' do not carry any data.
[embodiment]
In order to understand the present invention in depth, the present invention is elaborated to the improvement and the specific embodiment of the HSDPA technology of R5 version below in conjunction with accompanying drawing and embodiment.
A. increase modulation indicating channel (MICH)
The present invention has added modulation indicating channel (MICH) on the HSDPA basis of R5 version, utilize the MICH channel to indicate the HS-SCCH channel of which terminal in the current subframe to be in state of activation, and the modulation system of the HS-SCCH channel under each activated terminals.
The modulation indicating channel fixedly occupies a sign indicating number that SF equals 16 on the time slot 0, adopts the QPSK modulation, adopts the broadcast beam excipient to transmit.Each carrier frequency of modulation indicating channel need dispose one, considers the situation of overloading networking frequently, and the modulation indicating channel all is placed on the main carrier frequency.
Modulation indicating channel loaded information is the burst of a 32bit, and its message structure as shown in Figure 1.This 32bit sends in a wireless sub-frame through after the following step process.
CRC coding: information is carried out 8bit CRC coding
Convolutional encoding: employing length is 9 1/2 convolutional encoding, and coding back data length is 96bit
Rate-matched: because a data burst is 88bit, therefore the data behind the coding will be carried out the punching of 8bit
Interweave: adopt " 11 row * 8 row " interleaver to carry out
The modulation 32bit information that indicating channel carried comprises MIB (Modulation Indication Bitmap), UEI (UEIndicator) and RTN (Re-Transmit Number) three parts:
MIB: this territory comprises 16 bits, is used for indicating the modulation system of sign indicating number of 16 SF16 of current subframe time slot 6.0 represents QPSK, and 1 represents 16QAM.Terminal can be known the modulation system that each code channel adopted on the time slot 6 by the MIB territory of reading the modulation indicating channel, thereby can be correctly decoded data carried by data on the time slot 6.
UEI:UEI is the bitmap of one 12 bit, is used for indicating current subframe to have which terminal to be in state of activation (promptly transmitting data in current TTI).
Among the MU-HSDPA all subframes are divided into four subframe groups according to the remainder of subframe numbers mould 4.Terminal iidentification u constitutes a sign altogether to I in subframe group group number g and the group, and I=(g, u).The scope of subframe group number g is [0,3], and the scope of terminal iidentification u is [1,12] in the group.Each terminal is distributed to the one or more signs of this terminal to I by the service rate of network based terminal when setting up the calling connection.Terminal is determined the own information of being concerned about according to the sign of oneself to I in the MICH channel.
For example speech business by the VoIP carrying, network allocation gives sign of terminal to I=(1,3) when terminal inserts.The subframe group number g of terminal is 1, and the data (except the data retransmission) that this terminal is mail in expression only can send in subframe numbers is the subframe of 4n+1; Sign u is that the indication bit of 3bit for this terminal played on 3 expression MICH channel UEI left sides in the group.Representing when this bit is 1 has New Development to give the data of this terminal in the current TTI, terminal need read the HS-SCCH signaling from the corresponding code channel of current subframe time slot 6.HS-SCCH signaling under this terminal is also determined by UEI in the position of 6 kinds of occupied code channels of time slot.Have m position bit to be changed to 1 if UEI plays on a left side the 1st to the u bit, then the code channel of m SF16 in the time slot 6 is the code channel of this terminal of carrying HS-SCCH signaling.
RTN:MU-HSDPA continues to use the HARQ mechanism of HSDPA.When the data of UE need retransmit, also need in time slot 6, send relevant HS-SCCH signaling.
The channel monitoring of considering UE is limited in one's ability, and the MU-HSDPA design comprises two and retransmits collection (Retransmit Set).The UE that the interior terminal iidentification u of group is an odd number belongs to Retransmit Set I, and u is that the UE of even number belongs to Retransmit Set II.RTN-I and RTN-II are used to indicate current TTI, and each retransmits concentrated number of carrying out the UE of data re-transmission.
Suppose that in 12 bits of UEI M bit set being arranged is 1, there be R1 UE in this subframe, to retransmit among the Retransmit Set I, and there is the individual UE of R1 ' to adopt the QPSK modulation among this R1 UE, all the other UE adopt 16QAM modulation (modulation system of each UE can be obtained in conjunction with MIB), and then the UE among the Retransmit Set I need seek and read one's own HS-SCCH signaling from the M+1 of time slot 6 to the code channel of the individual SF16 of M+R1+R1 '.And the UE among the Retransmit Set II need be from M+R1+R1 '+1 of time slot 6 reads and seeks one's own HS-SCCH signaling to the code channel of M+R1+R1 '+individual SF16 of R2+R2 '.Wherein R2 is the number of the UE that retransmits in current subframe among the Retransmit Set II, and R2 ' is the number that adopts the UE of QPSK among this R2 UE.Retransmit in the affiliated HS-SCCH signaling of UE and comprise the UE-Id that can discern UE.
Retransmission data is different with the New Development data, and the subframe group number is that the user's of g New Development data only can send in subframe numbers is the subframe of 4n+g; And retransmission data can send in the subframe arbitrarily.
B. increase common synchronization signaling channel (CSSCH)
Compare MU-HSDPA has increased the common synchronization signaling channel and has been used for the descending SS signaling of the unified UE of transmission with HSDPA.
In the R5 standard, each HSDPA user keeps uplink synchronous by the SS signaling in the A-DCH channel.Added a physical channel common synchronization signaling channel in the present invention.Concentrated in this common synchronization signaling channel and transmitted being dispersed in SS signaling that each A-DCH channel transmits originally.
In order to reduce the error rate of SS signaling, prevent to misread the step-out of the UE that causes because of SS, MU-HSDPA carries out chnnel coding to the SS signaling of carrying on the CSSCH channel.Concrete chnnel coding can adopt multiple coded system, and the Reed-Muller coding of second order (32,10) or (16,5) is adopted in suggestion.
Reed-Muller with second order (16,5) is encoded to the data encapsulation form that example is introduced the CSSCH channel below.Because the SS signaling that each TTI of UE (5ms) issues has three kinds may, i.e. " 1/8 chip in advance " (with ' ↑ ' expression), " stepping back 1/8 chip " (with ' ↓ ' expression) and " not adjusting " (with '-' expression), utilize 1.6 bits can represent this three kinds of states in theory, therefore the SS signaling of 3 UE can be represented with the code block of one 5 bit.The relation such as the following table of the synchronous adjustment signaling of the code block of 5 bits and 3 UE:
The table of comparisons of 5 bit code blocks and SS signaling
| 00000 | - - - | 01000 | ↑ ↑ - | 10000 | ↓ ↑ ↓ | 11000 | - ↑ ↑ |
| 00001 | ↓ - - | 01001 | - - ↓ | 10001 | ↑ ↑ ↓ | 11001 | ↓ ↑ ↑ |
| 00010 | ↑ - - | 01010 | ↓ - ↓ | 10010 | - - ↑ | 11010 | ↑ ↑ ↑ |
| 00011 | - ↓ - | 01011 | ↑ - ↓ | 10011 | ↓ - ↑ | 11011 | N/A |
| 00100 | ↓ ↓ - | 01100 | - ↓ ↓ | 10100 | ↑ - ↑ | 11100 | N/A |
| 00101 | ↑ ↓ - | 01101 | ↓ ↓ ↓ | 10101 | - ↓ ↑ | 11101 | N/A |
| 00110 | - ↑ - | 01110 | ↑ ↓ ↓ | 10110 | ↓ ↓ ↑ | 11110 | N/A |
| 00111 | ↓ ↑ - | 01111 | - ↑ ↓ | 10111 | ↑ ↓ ↑ | 11111 | N/A |
MU-HSDPA designing user capacity is 48 Ireland of single carrier frequency.If adopt the second order Reed-Muller coding of (16,5), 48 UE need be divided into 16 groups, every group of 3 UE.The SS signaling of every group of UE is 5bit, and the second order Reed-Muller coding back of carrying out (16,5) is 16bit, and 48 users' SS signaling needs 256bit altogether.Can these all SS information be carried with the sign indicating number of three SF16.
When UE set up the RRC connection, network was that each UE distributes a sync numbers, and notifies UE by RRC Connection Setup message with this sync numbers.Read corresponding oneself SS signaling in the corresponding code block that UE is carried from the CSSCH channel in each subframe subsequently after obtaining the sync numbers of oneself.For example certain UE sync numbers of distributing is 5, means that the SS signaling of this UE is positioned at second group, and then this UE only reads second code block (each code block 16bit) of CSSCH channel at every turn, and second SS signaling in this code block is to SS signaling that should UE.
In order to reduce the transmitting power of time slot 0, the code channel that CSSCH can be occupied is placed on business time-slot (TS1-TS6), and it is carried out the broadcast beam excipient, and its transmitting power is set when setting up the sub-district, and power control is not carried out in the centre.
C. dedicated channel is followed in cancellation
In HSDPA, each UE has one and follows dedicated channel, and this dedicated channel is used to transmit RRC signaling and SS signaling.Yet RRC message only just can transmit under situation seldom, from the angle of sign indicating number resource, for RRC message is reserved the waste that seems very of a code channel separately.
In MU-HSDPA, to have cancelled and followed dedicated channel, the RRC message of UE is placed in the affiliated shared channel of UE and sends.The SS signaling then sends in newly-increased common synchronization channel.
D. cancelled the HS-SICH channel
In HSDPA, corresponding to each HS-SCCH channel, there is a up HS-SICH channel, whether this channel is used in reference to and is shown in the data of transmitting in the HS-DSCH channel and needs to retransmit and how to retransmit.
In the R5 of 3GPP standard, the HS-SICH channel bearing the information of 8 bits: the CQI of the ACK/NACK of 1 bit and 7 bits.Yet in order to increase redundancy, the information of this 8 bit has but occupied the code channel of a SF16, has caused the very serious wasting of resources.
The present invention has added a bed course between physical layer and MAC layer, utilize this bed course to transmit ACK/NACK and CQI.This bed course has two kinds of forms
Form 1: bed course adds 4 bits in the front of MAC PDU, comprises the HARQ-Id of 3 bits and the ACK/NACK of 1 bit, as Fig. 3
Form 2: bed course adds 11 bits in the front of MAC PDU, comprises the HARQ-Id of 3 bits, and the CQI of the ACK/NACK of 1 bit and 7 bits (Channel Quality Indicator) is as Fig. 4.
HARQ-Id wherein, the definition of ACQI is identical with the R5 standard.
This bed course only is arranged in upstream data DCH.UE utilizes the TFCI among the up DPCH to indicate among the current upstream data DCH whether comprise this bed course, if comprise bed course then what the form of bed course is.
If comprise bed course among the TFCI indication current data DCH, the form of bed course is form 1 or form 2.Then NodeB obtains HARQ-Id from bed course, ACK/NACK and CQI information, and according to these feedback informations how decision retransmits downlink data.NodeB sends to RNC with MAC PDU by the Iu-b mouth after bed course is deleted.
F. compress the signaling format of HS-SCCH
Among the HSDPA, HS-SCCH must adopt the modulation system of QPSK as shared channel, and owing to its tediously long time sign indicating number form, makes every HS-SCCH channel occupy the code channel of two SF16.
In order to save the shared sign indicating number resource of HS-SCCH channel, the downlink signaling with the HS-SCCH channel in MU-HSDPA changes channel associated signalling into by common channel signalling.Descending HS-SCCH signaling adopts identical modulation system with downlink data.Its modulation system terminal is determined by the MIB signaling that reads the MICH channel.
The HS-SCCH signaling of each UE constitutes a signaling code block.HS-SCCH signaling code blocks all among the MU-HSDPA all are fixed in the time slot 6.UE at first needs to determine according to UEI in the MICH channel and current subframe numbers whether the New Development data that send to oneself are arranged in the current subframe.If have then determine the occupied code channel of HS-SCCH signaling in time slot 6 under own, and determine the modulation system of this code channel according to the MIB in the MICH channel according to the UEI in the MICH channel.After all these information were determined, UE just can parse the HS-SCCH signaling of oneself from code channel.
If UE is in the re-transmission that waits pending data, except paying close attention to the New Development data, UE also needs to pay close attention to data retransmission.All UE are divided into two re-transmission collection according to the parity of terminal iidentification in the group of being distributed.UE when receiving data retransmission at first according to the MIB among the MICH, UEI and RTN-I, the modulation system and the code channel scope of living in of HS-SCCH signaling under RTN-II determines, and separate out the HS-SCCH signaling from corresponding location solution.Finally determine one's own HS-SCCH signaling according to the UE-ID in the HS-SCCH signaling.
MU-HSDPA has compressed the form of original HS-SCCH signaling.In HSDPA, no matter be New Development data or retransmission data, signaling on its HS-SCCH channel all adopts identical form, whether and reach at service transmission rate in MU-HSDPA is that retransmission data is divided into three classes with signaling format: low speed (being lower than 16Kbps) New Development data service form, high speed New Development data service form and retransmission data traffic format.
Three kinds of parameter such as following tables that form carries:
| Parameter | Low speed New Development data service form | High speed New Development data service form | The retransmission data traffic format |
| The UE sign | N/A | N/A | 5bit |
| The resource allocation territory | 10bit | 13bit | 13bit |
| RRC comprises sign | 1bit | 1bit | 1bit |
| Transmission packed format/transmission block size | 4bit | 6bit | 6bit |
| HARQ-Id | 3bit | 3bit | 3bit |
| The redundant version number that increases | N/A | N/A | 3bit |
| Through-put power control | 2bit | 2bit | 2bit |
Explain one by one with regard to each parameter below:
The UE sign
Do not comprise UE-Id in low speed New Development data service form and the high speed New Development data service form.To I, and the UEI signaling among the MICH determines whether one's own HS-SCCH is arranged in the current subframe to UE according to oneself sign, and the position of affiliated HS-SCCH in time slot 6.And retransmit professional according to the definite corresponding UE of the UE-Id in the HS-SCCH signaling.
The resource allocation territory
HS-SCCH signaling code channel fixed set is on the low code channel of time slot 6 among the MU-HSDPA.And user data is positioned at the high code channel of time slot 6 and subsequently on the descending time slot of subframe except that time slot 6.From 0 code channel of first descending time slot of subframe subsequently, user data is with snakelike continuous distribution on each time slot (as Fig. 5), thereby the power of balanced each time slot reduces and disturbs.UE judges the particular location of data in subframe of oneself according to " resource allocation " territory.
For the New Development low-speed data service, the form in " the resource allocation territory " of New Development high-speed data service and retransmission data business is different:
-new speech business
7bit Start Point+3bit Length
The Start Point of 7bit is in order to the initial code channel position of indication user data in subframe.3bit is used to indicate the number of the code channel that data occupied continuously of this UE.
-new data service and repeating transmission are professional
" resource allocation territory " form of these two kinds of business is identical.The start position of supposing code channel that this user data is occupied is s, the final position be e then the value in " resource allocation territory " be 80*s+e.
The decimal number of supposing " resource allocation territory " expression is x, s=x/80 then, e=x%80.
RRC comprises sign
Being used for indication institute transmits certificate and whether comprises the RRC signaling information.
TFS Transport Format Set/transmission block size
When transmission low speed New Development data (being mainly speech business), this part comprises 4bit, is used for indication transmission packed format.Can support the 8 kind code rates of AMR4.7Kbps to AMR12.2Kbps.
When transmission new data service and re-transmission business, this part comprises the special information of 6bit, in order to indication transmission block size.
HARQ-Id
HSDPA is identical with 3GPP R5 version, 3bit.
The redundant version number that increases
HSDPA is identical with 3GPP R5 version, 3bit.
Through-put power control
HSDPA is identical with 3GPP R5 version, 2bit.
The channel coding method of three kinds of forms such as following table:
| Coded system | Low speed New Development data service form | High speed New Development data service form | The retransmission data traffic format |
| Add CRC | 8bit | 8bit | 8bit |
| Encryption algorithm | The 1/3Turbo sign indicating number | The 1/3Turbo | 1/3 convolution code |
| Rate-matched | The 8bit punching | The 27bit punching | 1bit repeats |
| Interweave | " 11 row * 8 row " interleaver | " 11 row * 8 row " interleaver | N/A |
| The dateout block size | 88bit | 88bit | 148bit |
Claims (10)
- One kind support a large amount of in the method that inserts of low speed data users' high speed downlink packet; 3GPP has introduced the high speed downlink packet access in the Release5 of 3G standard, be HSDPA, HSDPA user in the R5 standard utilizes the A-DCH channel to keep down-going synchronous and transmits RRC message, it is characterized in that having added the common synchronization signaling channel, all users' SS signaling is concentrated on a unified common synchronization signaling channel transmission, and the SS signaling carries out being carried on the common synchronization signaling channel after the chnnel coding; And change in the common synchronization channel and transmit, and change in the HS-DSCH channel and transmit being defined in the RRC message that transmits among the A-DCH in the R5 standard with being defined in the SS signaling of following dedicated channel A-DCH to transmit in the R5 standard.
- 2. the method that low speed data user's high speed downlink packet inserted during support according to claim 1 was a large amount of, it is characterized in that when UE sets up the RRC connection, network distributes a sync numbers for each UE, and notifies UE by RRCConnection Setup message with this sync numbers; Read corresponding oneself SS signaling in the corresponding code block that UE is carried from the CSSCH channel in each subframe subsequently after obtaining the sync numbers of oneself.
- 3, the method for a large amount of middle low speed data users' of support according to claim 1 high speed downlink packet access, it is characterized in that adding the modulation indicating channel: utilize the modulation indicating channel to indicate in the current subframe which terminal transmitting data, and the modulation system of the HS-SCCH channel under these terminals; Each carrier frequency need dispose a modulation indicating channel.
- 4. the method that low speed data user's high speed downlink packet inserted during support according to claim 3 was a large amount of is characterized in that the situation in overloading networking frequently, and the modulation indicating channel all is placed on the main carrier frequency; The carrying of modulation indicating channel MIB (Modulation Indication Bitmap), UEI (UE Indicator) and three kinds of signalings of RTN (Re-TransmitNumber).
- 5. the method that low speed data users' high speed downlink packet inserted during support according to claim 1 was a large amount of is characterized in that compressing the form of HS-SCCH signaling in the 3GPP R5 standard; All packets by service rate and whether retransmit and be divided three classes, are lower than the low speed New Development packet of 16Kbps, packet of high speed New Development and retransmitted data packet; Three kinds of respectively corresponding three kinds of different HS-SCCH signaling formats of grouping.
- 6. the method that low speed data user's high speed downlink packet inserted during support according to claim 1 was a large amount of, it is characterized in that also no longer in HS-SICH, transmitting corresponding to the feedback information of HS-SCCH, but between physical layer and MAC layer, added a bed course, utilize this bed course to transmit ACK/NAK and CQI information.
- 7. the method that low speed data users' high speed downlink packet inserted during support according to claim 1 was a large amount of is characterized in that all subframes are divided into four subframe groups according to the remainder of subframe numbers mould 4; Subframe group group number g: scope is terminal iidentification u in [0,3] and the group: scope is [1,12]; Constitute a sign altogether to I, and I=(g, u); Each terminal is distributed to the one or more signs of this terminal to I by the service rate of network based terminal when setting up the calling connection, terminal is determined the own information of being concerned about according to the sign of oneself to I in the modulation indicating channel.
- 8. the method that low speed data user's high speed downlink packet inserted during support according to claim 7 was a large amount of is characterized in that terminal is by reading the modulation system that the MIB that modulates on the indicating channel judges the code channel of each SF16 on the time slot 6; Terminal is according to oneself subframe group number g and the interior terminal iidentification u of group, determine by reading the UEI signaling of modulation on the indicating channel whether one's own New Development data are arranged in the current TTI, if any further determining own affiliated HS-SCCH signaling occupied code channel on time slot 6 again according to UEI; Terminal is determined the occupied code channel on time slot 6 of HS-SCCH signaling under the retransmission packet by reading the RTN signaling of modulation on the indicating channel.
- 9. the method that low speed data user's high speed downlink packet inserted during support according to claim 1 and 2 was a large amount of is characterized in that performing step is:(a1) terminal is set up and is called out when connecting, the subframe group number g at network side distributing terminals place, and the sign u of terminal in group;(a2) which terminal use the assessment of the scheduler in NodeB different terminals user serves with the decision current TTI;(a3) in case determine in given TTI, to need to provide service for certain terminal, NodeB needs the HS-DCSH parameter of identification necessity, such as operational numeral number, whether can use which capabilities limits is arranged on 16QAM, the terminal capability, the software memory length of terminal has been determined operable HARQ type;(a4) NodeB is according to terminal iidentification u in the subframe group number g of the terminal that will serve in the current TTI and the group, and the modulation system of terminal is filled in the signaling information of modulation indicating channel;(a5) NodeB begins to transmit the HS-SCCH signaling, transmits corresponding HS-DSCH data then;(a6) the modulation indicating channel on the terminal monitoring time slot 0 reads the HS-SCCH signaling the corresponding code channel if modulation indicating channel indication current TTI has the HS-SCCH signaling that sends to this terminal from time slot 6;(a7) in case terminal has received and understood the HS-SCCH signaling that sends to oneself, terminal just reads the also data of buffer memory HS-DSCH Channel Transmission from follow-up TTI;(a8) terminal judges whether that according to the ARQ sequence number among the HS-SCCH needs merge the data in the buffer memory;(a9) after in a single day the data that are combined were decoded, terminal was according to the result who the HS-DSCH data is carried out CRC check, in the special transmission piece transmission ACK/NACK indication of uplink direction by upstream data DCH.
- 10, the method for a large amount of middle low speed data users' of support according to claim 2 high speed downlink packet access, it is characterized in that the code channel that CSSCH occupies is placed on business time-slot (TS1-TS6), it is carried out the broadcast beam excipient, its transmitting power is set when setting up the sub-district, and power control is not carried out in the centre.
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| CNB2007100213173A CN100521688C (en) | 2007-04-06 | 2007-04-06 | High-speed down packet accessing method for supporting medium-low speed data user in TD-SCDMA |
| PCT/CN2008/000696 WO2008122206A1 (en) | 2007-04-06 | 2008-04-07 | A method for high speed downlink packet access for a large number of low- and medium-speed data ues in td-scdma |
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| CNB2007100213173A CN100521688C (en) | 2007-04-06 | 2007-04-06 | High-speed down packet accessing method for supporting medium-low speed data user in TD-SCDMA |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009092332A1 (en) * | 2008-01-17 | 2009-07-30 | Da Tang Mobile Communications Equipment Co., Ltd. | User equipment accessing method and system |
| CN101730257B (en) * | 2008-10-13 | 2013-12-18 | 电信科学技术研究院 | Signal transmission method, signal transmission equipment, system random access method and user equipment |
| CN105873208A (en) * | 2016-06-06 | 2016-08-17 | 杭州同步科技有限公司 | Command transmitting method applied in virtual studio system |
| CN107888262A (en) * | 2016-09-30 | 2018-04-06 | 中兴通讯股份有限公司 | Feedback method, transmission method, signal transmission method and the corresponding intrument of communication channel |
| CN109417449A (en) * | 2016-07-11 | 2019-03-01 | 高通股份有限公司 | Hybrid automatic repeat-request feedback and the scheduling of more Transmission Time Intervals |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102088732A (en) * | 2009-12-02 | 2011-06-08 | 爱立信(中国)通信有限公司 | Method and equipment for optimizing TBS table for low speed service |
| CN102378266B (en) * | 2010-08-09 | 2013-03-13 | 普天信息技术研究院有限公司 | Method for increasing quantity of access users of packet access network |
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| CN102573041B (en) * | 2010-12-31 | 2016-08-03 | 重庆重邮信科通信技术有限公司 | HSPA+ timing synchronization keeping method |
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100450938B1 (en) * | 2001-10-05 | 2004-10-02 | 삼성전자주식회사 | Apparatus for transmitting/receiving transpor[ro]t block set size information in communication system using high speed downlink packet access scheme and method therof |
| DE10158750B4 (en) * | 2001-11-30 | 2013-10-31 | Siemens Aktiengesellschaft | Method and device for carrying out a spatially selective packet data transmission |
| GB2429375B (en) * | 2005-08-18 | 2007-11-14 | Nec Technologies | Mobile radio communications device and related method and system |
-
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2009092332A1 (en) * | 2008-01-17 | 2009-07-30 | Da Tang Mobile Communications Equipment Co., Ltd. | User equipment accessing method and system |
| CN101489285B (en) * | 2008-01-17 | 2010-09-22 | 大唐移动通信设备有限公司 | User equipment access method and system |
| CN101730257B (en) * | 2008-10-13 | 2013-12-18 | 电信科学技术研究院 | Signal transmission method, signal transmission equipment, system random access method and user equipment |
| CN105873208A (en) * | 2016-06-06 | 2016-08-17 | 杭州同步科技有限公司 | Command transmitting method applied in virtual studio system |
| CN109417449A (en) * | 2016-07-11 | 2019-03-01 | 高通股份有限公司 | Hybrid automatic repeat-request feedback and the scheduling of more Transmission Time Intervals |
| CN109417449B (en) * | 2016-07-11 | 2021-11-02 | 高通股份有限公司 | Hybrid automatic repeat request feedback and multiple transmission time interval scheduling |
| CN107888262A (en) * | 2016-09-30 | 2018-04-06 | 中兴通讯股份有限公司 | Feedback method, transmission method, signal transmission method and the corresponding intrument of communication channel |
| CN107888262B (en) * | 2016-09-30 | 2021-05-11 | 中兴通讯股份有限公司 | Feedback method, transmission method, signaling transmission method and corresponding devices of communication channel |
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| WO2008122206A1 (en) | 2008-10-16 |
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