CN1980091A - Method for reducing terminal power consumption using public physic channel information - Google Patents

Abstract

The method includes following steps: transmitter at network side sends out wireless frame, common physical channel information of each wireless frame includes group info, which is group number of the terminal to receive the wireless frame; after receiving first wireless frame in each transmission time slot, terminal decodes common physical channel information, determines whether the information includes group number of the terminal based on the decoded group info; if the group info is not the group number of the terminal, then the terminal discards receiving remaining wireless frame data in the transmission time slot. The invention terminates receiving subsequent data in advance if the wireless frame data is not needed to receive so as to reduce power consumption.

Description

A kind of method of utilizing public physic channel information to reduce power consumption of terminal

Technical field

The present invention relates to a kind of method that reduces power consumption of terminal, particularly relate to a kind of method of utilizing public physic channel information to reduce power consumption of terminal.

Background technology

In existing mobile communications system, existing network keeps descending business to be connected the situation of (be in as terminal among the 3GPP under the CELL FACH state of RRC, network can send high-rise data or signaling to terminal by public physic channel S-CCPCH) with terminal by down public common.In this case, may have and surpass this public physic channel of terminal monitoring of one, terminal physical layer processing such as deciphers to the S-CCPCH signal that receives, and give high-rise (MAC layer) with the data passes of correct decoding, judge according to the terminal iidentification in the data (UEID) whether these data issue this terminal by high level.

The data of transmitting between physical layer and the MAC layer are to have periodically, and this cycle is called as the Transmission Time Interval (TTI) of transmission channel in 3GPP.The Transmission Time Interval of descending transmission channel can be 10ms, 20ms, 40ms, 80ms among the 3GPP.Radio frames length fixedly is 10ms among the 3GPP.

In addition, physical channel itself may be discontinuous.If aforesaid down public common is discontinuous distribution, terminal can other receive under the situation of task, at the transmission space closure receiver of this down public common having measurement, downlink synchronization tracking, receiving broadcasting information etc. in principle.

It below is an example that in the TD-SCDMA of 3GPP, keeps descending business to connect by down public common.Radio frames length is 10ms among the TD-SCDMA.

Used the Transmission Time Interval of 40ms in this example, and used discontinuous S-CCPCH, the repetition period is 160ms, and repeat length is 40ms.In this case, at the pusher side of posting a letter of network side, the high-rise data block of physical layer of giving will send out in a Transmission Time Interval.As shown in Figure 1, each data block has all taken the transmission time of 40ms; And represent that with the radio frames of grey mark this frame is taken by S-CCPCH among the figure, represent that with the radio frames of white marking this frame is not taken by S-CCPCH.

For end side, the radio frames demodulating data that must take at S-CCPCH by physical layer then, and after receiving the data of every 40ms, carry out processing such as channel decoding, could correctly solve the high level data in the Transmission Time Interval, and give high level.

If according to the original way of 3GPP, terminal physical layer just can be judged this part data and whether belong to terminal oneself after must receiving the data in the whole Transmission Time Interval and giving data link layer (L2) with data.Even do not issue this terminal even this means this blocks of data, terminal also must must be in accepting state in whole Transmission Time Interval.And the terminal that is in accepting state is for work such as demodulation, decodings and must be in the higher state of power consumption.

Under some special circumstances (as the trunking communication pattern), network can require terminal to be in the state that uses down public common to keep downlink business to connect for a long time, and this will bring very big power consumption of terminal problem.When the Transmission Time Interval of network side configuration was bigger, it is particularly outstanding that this problem just becomes.For common handheld terminal, under the battery capacity condition of limited, therefore the stand-by time of terminal can become very short.

Summary of the invention

The objective of the invention is to, a kind of method of utilizing public physic channel information to reduce power consumption of terminal is provided.

The method of utilizing public physic channel information to reduce power consumption of terminal of the present invention may further comprise the steps:

Step 1, the sender of network side sends radio frames, wherein, comprises grouping information in the public physic channel information of each radio frames, and this grouping information is the group number at the terminal place of this radio frames of reception;

Step 2, terminal is after receiving first radio frames of each Transmission Time Interval, public physic channel information in this radio frames is deciphered, the grouping information that obtains according to decoding judges whether the group number into the terminal place, when not being the group number at this terminal place in the grouping information, terminal abandons receiving the residue wireless frame data in this Transmission Time Interval.

Wherein, according to the UEID of terminal the terminal in the network is divided into groups and produce this grouping information.

Wherein, network with after TFCI information combines, is encoded described grouping information according to the coded system identical with TFCI information in the 3GPP standard, and puts in the radio frames according to the disposing way identical with TFCI information in the 3GPP standard and to launch.

The computing formula of the group number at above-mentioned terminal place is:

Group_ID＝UEID/Ng?mod?Ng

Wherein, Group_ID represents the group number at terminal place, and   represents downward rounding operation, and mod represents modulo operation.

And the mode that grouping information combines with TFCI information is:

$\mathrm{TG}=\{\begin{array}{c}0,\mathrm{TFCI}=0\\ \mathrm{TFCI}+\mathrm{Group}\_\mathrm{ID}\×\mathrm{Nt},\mathrm{TFCI}\≠0\end{array}$

Wherein, TG is a grouping information and value after TFCI information combines, and Nt is the quantity of transformat combination.

The invention has the beneficial effects as follows: by comprise the public physic channel information of grouping information in transmission, terminal can judge whether the data of the sender transmission of network side are the group number at own place from the grouping information of first radio frames of receiving, when not being the group number at own place, abandon receiving follow-up data, make when the data in this Transmission Time Interval be not when issuing this terminal, terminal need not be in accepting state in whole Transmission Time Interval, thereby avoided of the demodulation of this terminal for the data that do not need to receive, decipher grade and must be in the higher state of power consumption, and then reduce unnecessary power consumption.

Description of drawings

Fig. 1 is the frame assumption diagram of the radio frames that adopted among the 3GPP TD-SCDMA.

Fig. 2 reduces the flow chart of the method for power consumption of terminal for the present invention utilizes public physic channel information.

Fig. 3 is the structure of time slot figure of the radio frames that adopted among the 3GPP TD-SCDMA.

Fig. 4 is the structure of time slot figure of the formed radio frames of the present invention.

Embodiment

Utilize public physic channel information to reduce the method for power consumption of terminal below with reference to description of drawings the present invention.

In the TD-SCDMA of 3GPP, when keeping descending business to connect by down public common, each terminal all has the terminal iidentification UEID of self.In the present invention, reduce power consumption of terminal, at first need the terminal in the network to be divided into groups, suppose to be divided into Ng group here according to terminal UE ID in order to realize utilizing public physic channel information, group number is respectively 0,1 ... .Ng-1.Terminal is a random packet, but in case after the grouping, the grouping at this terminal place (group number) is exactly fixing in communication process after this.The computing formula of the group number at each terminal place (Group_ID) is:

Group_ID＝UEID/Ng?mod?Ng (1)

Wherein,   represents downward rounding operation, and mod represents modulo operation.

As shown in Figure 2, method of the present invention may further comprise the steps:

Step 1, the sender of network side also sends grouping information in each radio frames when sending high level data, and this grouping information is the group number that needs the terminal place of these data of reception.

In 3GPP, (Transport FormatCombination Indicator is TFCI) in order to indicate the form of current each transmission channel can to carry transport format combination information on the physical channel.TFCI is the physical layer control bit, and this information sends on each radio frames.The position of TFCI on radio frames as shown in Figure 3.When transformat combination (Transport Format Combination, quantity TFC) is Nt, then the coding before the TFCI value be 0,1,2 ... Nt is according to the 3GPP standard, wherein 1 to Nt can indicate current transformat combination kind, and 0 keep and use to special burst.

On this basis, in order when sending high level data, to send grouping information, the present invention proposes a kind of new physical layer control information TG (TFCI and Group Imformation), this information is combined by coding preceding TFCI information and grouping information, from formula 2, as can be seen, in physical layer control information TG, comprised TFCI information and the grouping information before the coding simultaneously.

$\mathrm{TG}=\{\begin{array}{c}0,\mathrm{TFCI}=0\\ \mathrm{TFCI}+\mathrm{Group}\_\mathrm{ID}\×\mathrm{Nt},\mathrm{TFCI}\≠0\end{array}---\left(2\right)$

Because TFCI=0 keeps to special burst to use, therefore, also TG=0 is kept in the present invention to special burst and use, certainly, can be not limited to this regulation.Like this, the total Ng of TG * Nt+1 kind possibility value; And for the terminal of a particular group (Group_ID=S), effectively TG comprise 0,1+S * Nt, 2+S * Nt ... Ng+S * Nt} is Ng+1 element altogether.

After sender generates TG,, TG is encoded according to the mode of 3GPP to the TFCI coding.The position that TG behind the coding replaces TFCI bit among the 3GPP sends on radio frames, as shown in Figure 4.Like this, each radio frames has been carried the complete physical layer control information TG that comprises grouping information and TFCI information.

Step 2, terminal are after receiving first radio frames of each Transmission Time Interval, to deciphering and judge whether grouping information is the group number at terminal place in the territory at TG information place, when not being, abandon the reception of follow-up data, when being, then continue to receive follow-up data.

Pass through said method, can be when data be the terminal that sends in the group number at certain terminal place, avoid this terminal in whole Transmission Time Interval, to be in this situation of accepting state, thereby when this terminal does not receive data, finish accepting state in advance, reduce the power consumption of terminal, prolong the stand-by time of terminal.

In order further to understand the present invention, below further specify method of the present invention with an example.

In this example, being divided into 4 groups with terminal is that example describes.Have only a FACH channel among the CCTrCH at current FACH place, transformat have 3 kinds TF0, TF1, TF2}, system gives the TG bit after this CCTrCH has disposed 16 codings.

In this configuration, Ng=4, Nt=3, the value of TFCI be 0,1,2,3}, wherein TFCI value 1,2,3 corresponding respectively transformats are TF0, TF1, TF2.Use the user of this FACH to be divided into 4 groups (Group ID is respectively 0,1,2,3).Suppose that current FACH sends to the 1st group of user, and used the transformat of TF2; Be GrouP_ID=1, TFCI=3.Then at this moment:

TG＝TFCI(3)+Group_ID×Nt(3)＝6

The TG value is 6, and being converted into binary system is 0110.TG (i.e. 0,110 four binary bits) before the coding becomes 16 bits after according to 3GPP the mode of TFCI coding being encoded, and is split as 4 parts (according to the mode that splits TFCI) again and sends in 1 radio frames.

For terminal,, can decipher and know that TG is 6 the TG bit if a terminal that belongs to the 0th group has received first radio frames.And for the 0th group terminal, effectively the TG span should be 0,1,2,3}, so this terminal can judge that the data of whole Transmission Time Interval do not issue oneself, thereby can no longer receive 3 radio frames of back 30ms.

For the 1st group terminal, effectively the TG span should be 0,4,5,6}, the TG=6 that terminal solves can judge that the data of this Transmission Time Interval are issued this group terminal, and TFCI=TG-Group_ID * Nt=3.Terminal thereby needs continue to receive 3 radio frames of back 30ms, and according to the TFCI that calculates the data of 40ms are carried out processing such as channel decoding, send to high level afterwards, judge according to terminal iidentification whether these data really issue this user by high level.

By adopting said method, can be so that between terminal and network, keep under the professional situation about being connected by down public common, a plurality of radio frames that terminal can send in data is in the time, and the TG by first radio frames judges the reception that whether is necessary to carry out follow-up data.Thereby this make there is no need to receive follow-up data terminal as early as possible end data receive and reduced it and receive the needed power consumption of data that does not belong to it.

Use the Transmission Time Interval of 40ms in the above specific embodiment and used discontinuous S-CCPCH that (repetition period is 160ms, repeat length is 40ms) describe as an example, be understandable that, according to above-mentioned specific descriptions, method of the present invention can be applied to the situation that Transmission Time Interval is 10ms, 20ms, 80ms equally similarly.

The present invention is not limited to the foregoing description; those those of ordinary skills should drop within the method scope required for protection of claim of the present invention by reading behind the application simple modification, modification or equivalent that the present invention made.

Claims (5)

1. method of utilizing public physic channel information to reduce power consumption of terminal, this method may further comprise the steps:

Step 1, the sender of network side sends radio frames, wherein, comprises grouping information in the public physic channel information of each radio frames, and this grouping information is the group number at the terminal place of this radio frames of reception;

Step 2, terminal is after receiving first radio frames of each Transmission Time Interval, public physic channel information in this radio frames is deciphered, the grouping information that obtains according to decoding judges whether the group number into the terminal place, when not being the group number at this terminal place in the grouping information, terminal abandons receiving the residue wireless frame data in this Transmission Time Interval.

2. the method for claim 1, wherein the terminal in the network is divided into groups and produce this grouping information according to the UEID of terminal.

3. the method for claim 1, wherein, network with after TFCI information combines, is encoded described grouping information according to the coded system identical with TFCI information in the 3GPP standard, and puts in the radio frames according to the disposing way identical with TFCI information in the 3GPP standard and to launch.

4. method as claimed in claim 2, the computing formula of the group number at terminal place is:

Group_ID＝UEID/Ngmod?Ng

Wherein, Group_ID is the group number at terminal place, and   represents downward rounding operation, and mod represents modulo operation.

5. method as claimed in claim 3, wherein, the mode that grouping information combines with TFCI information is:

$\mathrm{TG}=\left\{\begin{array}{c}0,\mathrm{TFCI}=0\\ \mathrm{TFCI}+\mathrm{Group}\_\mathrm{ID}\×\mathrm{Nt},\mathrm{TFCI}\≠0\end{array}\right.$

Wherein, TG is a grouping information and value after TFCI information combines, and Nt is the quantity of transformat combination.

Images