CN101489256A

CN101489256A - Method for receiving data by TD-SCDMA terminal

Info

Publication number: CN101489256A
Application number: CNA2009100787980A
Authority: CN
Inventors: 张嵩
Original assignee: Beijing T3G Technology Co Ltd
Current assignee: Beijing T3G Technology Co Ltd
Priority date: 2009-03-03
Filing date: 2009-03-03
Publication date: 2009-07-22
Anticipated expiration: 2029-03-03
Also published as: CN101489256B

Abstract

The present invention provides a method for receiving data by TD-SCDMA terminal. The method of the invention comprises the following steps: step A, when the terminal receives the data package transmitted by the network side, analyzing the TFCI of data package, and confirming the CTFC of data package according to the TFCI of data package; step B, determining whether the CTFC of data package is effective: if yes, continuing for analyzing the data package; otherwise discarding the package; wherein, whether the CTFC is effective is confirmed according to whether data exists on a first transmission channel of TFC obtained from analyzing the CTFC. The first transmission channel is the downlink transmission channel which is not used presently in all transmission channel configured by the network. The efficiency for receiving data by the physical layer of terminal can be increased.

Description

A kind of TD-SCDMA terminal receives the method for data

Technical field

The present invention relates to the mobile communication technology field, be specifically related to the method that a kind of Time Division-Synchronous Code Division Multiple Access (TD-SCDMA, Time-Division Synchronization Code Division Multiple Access) terminal (UE) receives data.

Background technology

In the actual networking of TD-SCDMA system, in order to improve the efficient of TD-SCDMA system configuration information, the configuration high-speed downlink link packet that sends to the TD-SCDMA terminal at network side inserts (HSDPA, High Speed Data Packet Access) in the Ye Wu configuration messages, generally include high-speed downlink shared channel (HS-DSCH,, High-Speed Downlink Shared Channel) and configuration information and dedicated channel (DCH, Dedicated Channel) configuration information.Like this, in the follow-up business process, network based actual application environment, switch to non-HDSPA when professional in the needs terminal from the HSDPA business, only change this professional radio bearer (RB, Radio Bear) map information, the RB map information is sent to terminal by Network reconfiguration message; Terminal is according to Network reconfiguration message, and the RB that this is professional is mapped on the pre-configured DCH channel.Be that the DCH configuration information that terminal can utilize previous network to issue changes the RB mapping, network is the DCH and the corresponding transformat combination calculated value (CTFC of configure terminal again, Calculated Transport Format Combination) information such as, thus allocative efficiency can be improved.

As can be seen, terminal can get access to the configuration information of a plurality of channels from the configuration messages (as the configuration messages of HSDPA business) that network side issues, and configuration that terminal is used at a time may be one or several in described a plurality of configuration information.In this case, how terminal handles current configuration of just using and the current configuration that does not have use after the configuration messages of receiving network or reconfiguration message, to improve the efficient that physical layer receives data, become one and bite problem to be solved.

Summary of the invention

Technical problem to be solved by this invention provides the method that a kind of TD-SCDMA terminal receives data, in order to improve the efficient that terminal physical layer receives data.

For solving the problems of the technologies described above, it is as follows to the invention provides scheme:

A kind of TD-SCDMA terminal receives the method for data, comprising:

Steps A, terminal decodes the TFCI of this packet, and determines the CTFC of this packet according to the TFCI of this packet when receiving the packet of network side transmission;

Step B, whether the CTFC of this packet of terminal judges is effective: if effectively, then continue to resolve this packet; Otherwise, abandon this packet; Wherein, whether whether CTFC effectively be not have data to determine among the TFC that obtains on first transmission channel according to being resolved by this CTFC, the current descending transmission channel that does not have use in all transmission channels that described first transmission channel is a network configuration.

Preferably, in the said method, in advance for each CTFC of network configuration is provided for indicating whether effective sign position of this CTFC respectively, among the described step B, terminal further according to the sign position of the CTFC of this packet, judges whether the CTFC of this packet is effective.

Preferably, in the said method, described steps A specifically comprises: terminal is decoded according to the TFCI of maximum likelihood algorithm to packet, obtains most probable TFCI and inferior possible TFCI, and determines the most probable CTFC of this packet according to described most probable TFCI;

Described step B specifically comprises:

Whether described most probable CTFC is effective for terminal judges:

If effectively, then continue to resolve this packet according to described most probable CTFC;

If invalid, then further determine the inferior possible CTFC of this packet, and judge whether the possible CTFC of this time is effective:, then continue to resolve this packet according to the possible CTFC of this time if effectively according to described possible TFCI; Otherwise, just carry out the described operation that abandons this packet.

Preferably, in the said method, the descending transmission channel that terminal is shone upon separately according to the radio bearer RB and the Signaling Radio Bearer SRB of current use, determine the descending transmission channel of current use, and then from all descending transmission channel of network configuration, select the current descending transmission channel that does not have use, obtain described first transmission channel.

Preferably, in the said method, described terminal is further according to the network configuration message or the Network reconfiguration message that receive, obtain the RB map information of the current business of network configuration, and, determine the RB of current use and the descending transmission channel that SRB shines upon separately according to the RB map information of current business.

Preferably, in the said method, described current business comprises that high-speed downlink packet inserts HSDPA business, dedicated channel DCH business and High Speed Uplink Packet and inserts the HSUPA business.

From the above as can be seen, TD-SCDMA terminal provided by the invention receives the method for data, CTFC according to packet resolves among the TFC that obtains whether do not have data on the current descending transmission channel that does not use, judge whether this CTFC is effective, if it is invalid, then abandon this packet, thereby avoided the misdata bag to have influence on the Data Receiving on upper strata, improved the efficient that physical layer receives data.Simultaneously, by abandoning the CTFC invalid data packets, contingent mistake in the time of can avoiding the upper strata to continue data between a plurality of DCH improves the stability of MAC layer and rlc layer among the present invention.In addition, when the pairing CTFC of most probable TFCI that the present invention also further obtains in decoding is invalid, utilize time possible pairing effective CTFC of TFCI that packet is resolved, can improve the accurate of TFCI decoding, reduce the probability of packet loss or re-transmission, further improve the treatment effeciency of physical layer.

Description of drawings

Fig. 1 is the flow chart that the described TD-SCDMA terminal of the embodiment of the invention receives the method for data.

Embodiment

The present invention proposes the method that a kind of TD-SCDMA terminal receives data, according to the current use configuration of terminal, validity to each CTFC of network side configuration is provided with, then, whether the CTFC according to the packet that receives effectively decides how to handle this packet, thereby can effectively improve the efficient that physical layer receives data.The present invention is elaborated by specific embodiment below in conjunction with accompanying drawing.

Present embodiment switches to example with UE and describes between HSDPA business and DCH business.Certainly, the present invention not only is confined between DCH business and the HSDPA business, can also be applicable between DCH business and the DCH business, and the switching between HSUPA business and the DCH business.As shown in Figure 1, the method for the terminal of TD-SCDMA described in present embodiment reception data specifically may further comprise the steps:

Step 101, UE initiates service request to network side, and here, described business can be packet switching PS business or circuit switching (CS) business, and hypothesis is the PS business here.

Step 102, UE by with network side between set up RRC and be connected, go to connection mode by idle pulley, after the RRC connection is set up successfully, the signaling of setting up corresponding service connects, afterwards network side can set up by radio bearer (Radio Bearer Setup) message carry out the radio bearer of above-mentioned business (RB, RadioBearer), the configuration of resource such as transmission channel and physical channel.

Step 103, after the PS business is successfully set up, in the professional use of PS after this, network side can carry out resource reconfiguration to UE according to situations such as actual application environment (as factors such as current network resources, PS service traffics), and the mode of reshuffling can be to reshuffle Network reconfiguration message such as (Radio BearerReconfiguration) message to carry out reprovision by radio bearer.

Step 104, the UE side joint is received the Network reconfiguration message that network side sends, by RRC according to the Network reconfiguration message that receives, the resource of judging the configuration of current network is HSDPA business or DCH business, select corresponding RB configuration then, bottom is disposed accordingly, be provided with comprising validity to each CTFC of network configuration.Because network is when configuration RB map information, a RB can dispose many cover mappings, but current effective only is a cover wherein.Under network may all dispose all RB map informations in a configuration messages, so RRC need be according to the current map information of RB, what judge current use was which kind of business (as HSDAP business or DCH business), and then bottom is disposed accordingly.

Concrete, in the above-mentioned steps 104, RRC is after receiving Network reconfiguration message, this message is carried out abstract syntax notation one (ASN.1, Abstract Syntax Notation One) decoding and integrity protection verification, after the integrity protection verification is passed through, the RB configuration information that can obtain the current business uplink and downlink according to the RB map information in this message (RB MappingInfo) (is supported HSDPA at the current persistent district of UE, and UE also supports under the situation of HSDPA, network side can be mapped in DCH to up RB, and descending RB is mapped on the HS-DSCH; When Internet resources deficiency or UE move to the sub-district of not supporting HSDPA, network side then can be mapped to descending RB on the DCH), and transmission channel in this message and physical channel handled, preserve corresponding information, dispose relevant information by configuration primitive to bottom.

When bottom is disposed, need be provided for indicating whether effectively sign position of this CTFC respectively for each CTFC of network configuration, be specially:

At first according to the Network reconfiguration message that receives, obtain the RB map information of the current business of network configuration, and according to the RB map information of current business, determine the RB (this RB is used for the RAB of user plane or the RB of its son stream) of current use and the descending transmission channel that SRB (this SRB is the Signaling Radio Bearer SRB that is used for the transmission of control plane signaling) shines upon separately, obtain the descending transmission channel of current use, and then from all descending transmission channel of network configuration, select the current descending transmission channel that does not have use.For convenience, current untapped descending transmission channel is called " first transmission channel " herein, first transmission channel has one or more;

Then, each CTFC to network configuration resolves, obtain the transformat combination (TFC of each CTFC correspondence, Transport Format Combination), include the transformat indication (TFI, Transport Format Indicator) of each transmission channel of this CTFC correspondence among this TFC; And then whether according to the TFI of first transmission channel that comprises among this TFC, judging has data on first transmission channel, if there are not data, the sign position of then putting this CTFC when bottom disposes this CTFC is invalid, is 1 with this home position for example; If data are arranged, the sign position of then putting this CTFC when bottom disposes this CTFC is 0 with this home position for example for effectively.Here, have when a plurality of at first transmission channel, described do not have data to be meant on the first all transmission channels all not have data, and described have data to be meant at least one first transmission channel data are arranged.As can be seen, effectively CTFC is the corresponding CTFC of packet possibility that UE receives under current business configuration, and invalid CTFC then is that the packet that UE receives under current business configuration can not corresponding CTFC.

Step 105, UE is when receiving the packet of network side transmission, at first decode the transformat combination indication (TFCI, Transport Format Combination Indicator) of this packet, determine the CTFC of this packet then according to the TFCI of this packet.

Usually, network side can send to UE with the CTFC argument sequence that comprises a plurality of CTFC when being UE configurating downlink CTFC information; When UE receives this CTFC argument sequence, according to the reception of CTFC order, with each CTFC successively with each TFCI correspondence, promptly exist corresponding relation between TFCI and the CTFC, TFCI is the index of CTFC.UE can after decoded packet data is obtained TFCI, determine the CTFC of this packet correspondence according to this corresponding relation.

Step 106, UE judges according to the sign position of the CTFC of this packet whether the CTFC of this packet is effective: if effectively, then continue to resolve this packet; Otherwise, abandon this packet.

Here, the sign position of CTFC is invalid, means the data that include in this packet on first transmission channel.And in fact be that data should not arranged on first transmission channel under current business configuration, therefore, the TFCI of this packet that decodes in the step 105 is wrong.Cause the reason of this decoded in error to have multiple: to cause packet error rate rising, network side having to have sent data etc. on the descending transmission channel of using mistakenly such as the wireless transmission ecological deterioration.

In the step 106, when the CTFC that judges this packet is invalid, no longer this packet is done further to resolve, directly abandon this packet.This processing mode has the following advantages at least:

1) improved the fault-tolerant ability of UE.If because network side has transmitted data current descending transmission channel that does not have to use, perhaps wireless transmission ecological deterioration, cause the UE decoding to obtain wrong TFCI, in this situation summer, prior art can't detect this TFCI error data packets usually, and this packet is continued (as media access control MAC layer or Radio Link control rlc layer) transmission toward the upper strata, and then cause the upper strata problems such as sequence of data packet entanglement to occur, have a strong impact on the Data Receiving on upper strata.And according to the present invention, the packet that can intercept and capture TFCI mistake (promptly the CTFC of this TFCI correspondence is invalid) has avoided the misdata bag to have influence on the Data Receiving on upper strata also with this data packet discarding, thereby has improved the efficient of physical layer reception data.

2) improved the stability of MAC layer and rlc layer.Identical or become certain multiple relation such as the transmission block size (TB Size) that two DCH are arranged among, the network a plurality of DCH to the UE configuration, one of them DCH is current without any descending RB mapping.When decoding wrong TFC, data may be separated to the DCH that does not have the RB mapping from the DCH that the RB mapping is arranged in the prior art, so cause MAC or more the rlc layer on upper strata when deal with data, occur unusually.And can guarantee that not having data on the DCH that does not have the RB mapping reports, and has improved the stability on upper strata directly with this data packet discarding according to the present invention.

Further, in order to improve the decoding correctness of UE to TFCI, present embodiment can be handled in such a way to above-mentioned steps 105～106:

Step 105 ', UE is when receiving the packet of network side transmission, TFCI to this packet decodes according to maximum likelihood algorithm, determines the most probable TFCI and the inferior possible TFCI of this packet, and determines the most probable CTFC of this packet according to described most probable TFCI;

Step 106 ', terminal judges according to the sign position of described most probable CTFC whether described most probable CTFC is effective:

If invalid, then further determine the inferior possible CTFC of this packet, and judge whether the possible CTFC of this time is effective:, then continue to resolve this packet according to the possible CTFC of this time if effectively according to described possible TFCI; Otherwise, just abandon this packet.

Above-mentioned steps 105 '～106 ' can improve the decoding correctness of UE to TFCI.For example, correct TFCI is 1, and since a variety of causes to cause according to the most probable TFCI that maximum likelihood algorithm decodes out be 2, and 2 are words of an invalid TFCI, then can select for use time possible and the sign position effectively a TFCI decode, thereby avoided causing data to separate wrong problem to a certain extent, reduced the probability of packet loss or re-transmission, further improved the treatment effeciency of physical layer because TFCI separates mistake.

In order to be more readily understood the foregoing description,, present embodiment is described further below in conjunction with a real network ios dhcp sample configuration IOS DHCP.

At first; when UE initiation packet exchange (PS) is professional, at first to sets up RRC and connect, connect to set up at RRC and set up SRB in the process and (can set up a plurality of SRB usually; these three SRB of SRB1～SRB3 are arranged in this example), concrete in the RRC Connection Setup message that UE receives:

SRB1, SRB2, the transmission channel mapping relations of SRB3 all are:

Up (UL): DCH1; Descending (DL): DCH1

Transport channel configuration information is:

DL DCH 1; Transmission block number (TB num): 0,1; Transmission block size (TB size) 144

Descending CTFC configuration information is: CTFC:0,1

According to above configuration as can be known, the SRB size of data of the carrying on the DCH1 is TB num * TB size, and wherein, TB num is 0 or 1, and TB size is 144.

Connecting the SRB mapping relations of setting up in the foundation at RRC has two covers, as shown in following table 1.FACH in the table 1 is meant forward access channel, and RACH is meant Random Access Channel.

Table 1:RRC connects SRB mapping relations in the foundation

After the successful connection of PS traffic signaling is set up, network side configuration PS service resources, in the Radio Bearer Setup message that UE receives:

Transport channel configuration information is:

UL：DCH2；TB?num：0，1，2，3，4，5；TB?size：336

DL：DCH2；TB?num：0，1，2，3，4，5；TB?size：336

DL：HS-DSCH0；

Descending CTFC configuration information is:

CTFC：0，1，2，3，4，5，6，7，8，9，10，11

Here, the descending CTFC sequence of network side configuration is that the UE side is corresponding with each TFCI with each CTFC according to CTFC sequential reception order, so the corresponding relation here is: TFCI by 0～11 arranged in order _iCorresponding to CTFC _i, i=0～11 here.

It is as shown in table 2 below to connect RB (RB5) mapping relations of setting up in the foundation at RB, and wherein the mapping relations of RB5 also have two covers, and (1) cover is the mapping relations of DCH business, and (2) cover is the mapping relations of HSDPA business;

Table 2:RB connects RB mapping relations in the foundation

UE is according to Radio Bearer Setup message, judge at first whether the configuration of network satisfies the initiation condition of HSDPA business, when satisfying, the current effective RB of RB5 is mapped as (2) cover mapping, be up DCH2, descending HS-DSCH, and current (1) cover that effectively is mapped as in SRB1～3 shines upon, promptly the provisional capital is DCH1 up and down.But also has DCH2 in the descending transmission channel of network configuration, travel through the RB (RB5 that comprises in the table 1 (2) cover in SRB1～SRB3 in (1) cover and the table 2) of all configurations, can find the descending DCH2 of being mapped to of neither one among current effective RB, therefore can conclude the current not use of descending DCH2, but the information that has comprised descending DCH2 among the CTFC that disposes in the Radio Bearer Setup message, therefore, configuration information to this descending transmission channel DCH2 will be done special processing, by a sign position is set for each CTFC, to limit the relevant CTFC of the descending transmission channel DCH2 that does not use.

To bottom configuration CTFC the time, in each CTFC configuration structure, increase by one and be used to identify this CTFC sign position whether effectively under the current business configuration situation, when ident value is that 0 this CTFC of expression is effectively, when being 1, ident value represents that this value is invalid.Specifically can resolve the TFC that obtains the CTFC correspondence, comprise the TFI of each transmission channel among the TFC according to various CTFC analytic methods of the prior art, such as:

DCH1：P1＝1；

Transmission block number kind=2 of DCH2:P2=P1 * DCH1, the transmission block number of DCH1 has 0 and 1 two kind here, so the transmission block number kind of DCH1 is 2.

TFI ₂=CTFC/P ₂, CTFC '=CTFC% P ₂, TFI ₁=CTFC '/P ₁, here, TFI ₂And TFI ₁The TFI that represents DCH 2 and DCH 1 respectively.According to the aforementioned calculation formula, can obtain the mapping relations of CTFC and transmission channel as shown in table 3:

TFCI _i	CTFC _i	DL：DCH1	DL：DCH2
TFCI _i	CTFC _i	DL：DCH1	DL：DCH2	0	0	0	0
1	1	1	0	0	0	0	0
1	1	1	0	2	2	0	1
3	3	1	1	2	2	0	1
3	3	1	1	4	4	0	2
5	5	1	2	4	4	0	2
5	5	1	2	6	6	0	3
7	7	1	3	6	6	0	3
7	7	1	3	8	8	0	4
9	9	1	4	8	8	0	4
9	9	1	4	10	10	0	5
11	11	1	5	10	10	0	5

The mapping relations of table 3:CTFC and transmission channel

With the CTFC=9 in the table 3 is example:

TFI ₂＝CTFC/P ₂＝9/2＝4；

CTFC’＝CTFC％?P ₂＝9％2＝1；

TFI ₁＝＝CTFC’/P ₁＝1/1＝1。

Here, TFI ₂Value equal CTFC divided by P ₂After integer quotient, TFI ₁Value equal CTFC ' divided by P ₁After integer quotient, CTFC ' equals CTFC divided by P ₂After remainder.

Among the aforementioned calculation result, TFI ₂Equal 4 expression physical layers when receiving that TFCI is 9 packet, the size of data that comprises in these data on the DCH 2 is 4 * 336, and TFI ₁It is 1 * 144 that=1 expression DCH1 goes up data, that is to say that the TFI value of certain transmission channel is not 0 among the transformat combination TFC, then necessarily includes the data of this transmission channel among this transformat combination TFC.

Therefore as can be seen from Table 3, have only when CTFC is 0 or 1, just do not have data on the DCH2, when configuration bottom CTFC, having only value is that the sign position of 0,1 CTFC is effectively, and the home position of the CTFC of value 2～11 is invalid.

After this, after UE received packet, at first decoding obtained the TFCI of this packet, and then according to the corresponding relation between TFCI and the CTFC, obtains the CTFC of this packet; Then, check the sign position of this CTFC, judge whether this CTFC is effective,, if this CTFC is an invalid value, then directly abandon this bag, or do other processing if effectively then continue to separate this packet.Concrete, can handle in such a way:

Physical layer all is to judge most probable TFCI by maximum likelihood algorithm when decoding TFCI usually, can also further write down time possible TFCI in the present embodiment.When the situation of TFCI wrong occurring, such as correct TFCI is 1, but the current most probable TFCI value that solves is 2, and a kind of processing mode is to judge whether the CTFC of most probable TFCI correspondence is effective, invalid this packet that then directly abandons is to improve the efficient of physical layer; Another kind of fault-tolerant processing mode is, if the CTFC of most probable TFCI correspondence is invalid, then finds time possible TFCI, can be time possible two TFCI (such as 1 and 5), judges at first whether the CTFC of the TFCI correspondence that one of them time is possible is effective:

If effectively, then utilize the CTFC of the possible TFCI correspondence of this time, this packet is resolved;

If invalid, judge then whether the CTFC of the TFCI correspondence that another one is time possible is effective: if effectively, then utilize the CTFC of time possible TFCI correspondence of this another one, this packet is resolved; If invalid, just abandon this packet this moment.

Guarantee that at network side above-mentioned fault-tolerant processing mode can improve the accuracy rate of TFCI decoding under the prerequisite of reliability of TFCI and data.

The above only is the preferred embodiments of the present invention; should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as within protection scope of the present invention.

Claims

1. the method for TD-SCDMA terminal reception data is characterized in that, comprising:

2. the method for claim 1, it is characterized in that, in advance for whether effectively each CTFC of network configuration is provided for indicating this CTFC sign position respectively, among the described step B, terminal further according to the sign position of the CTFC of this packet, judges whether the CTFC of this packet is effective.

3. the method for claim 1 is characterized in that,

Described steps A specifically comprises: terminal is decoded according to the TFCI of maximum likelihood algorithm to packet, obtains most probable TFCI and inferior possible TFCI, and determines the most probable CTFC of this packet according to described most probable TFCI;

Described step B specifically comprises:

Whether described most probable CTFC is effective for terminal judges:

4. as each described method of claim 1～3, it is characterized in that,

The descending transmission channel that terminal is shone upon separately according to the radio bearer RB and the Signaling Radio Bearer SRB of current use, determine the descending transmission channel of current use, and then from all descending transmission channel of network configuration, select the current descending transmission channel that does not have use, obtain described first transmission channel.

5. method as claimed in claim 4 is characterized in that,

Described terminal is further according to the network configuration message or the Network reconfiguration message that receive, obtain the RB map information of the current business of network configuration, and, determine the RB of current use and the descending transmission channel that SRB shines upon separately according to the RB map information of current business.

6. method as claimed in claim 5 is characterized in that, described current business comprises that high-speed downlink packet inserts HSDPA business, dedicated channel DCH business and High Speed Uplink Packet and inserts the HSUPA business.