CN101232737B - Method for terminal to read broadcasting channel and terminal thereof - Google Patents

Method for terminal to read broadcasting channel and terminal thereof Download PDF

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Publication number
CN101232737B
CN101232737B CN2008101011173A CN200810101117A CN101232737B CN 101232737 B CN101232737 B CN 101232737B CN 2008101011173 A CN2008101011173 A CN 2008101011173A CN 200810101117 A CN200810101117 A CN 200810101117A CN 101232737 B CN101232737 B CN 101232737B
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read
terminal
system message
frame number
schedule information
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CN101232737A (en
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宋红萍
孙伟杰
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Beijing T3G Technology Co Ltd
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Beijing T3G Technology Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

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Abstract

The invention provides a method for a terminal to read the broadcast channel and the terminal. The method comprises: step A, a position where the distance between the position and the starting position of the maximum dispatch period of the cell is less than the pre-set threshold value is set to be the start-reading position, and the terminal starts to read the system message in the broadcast channel from the start-reading position; step B, if the frame number of the system under maintenance is the reading-start position, the terminal starts to read the system message in the broadcast channel till all the system messages are read and the process is finished. The terminal comprises a broadcast channel reading module, the broadcast channel reading module comprises a setting module of the start-reading position and a reading module. Utilizing the technical proposal, the terminal can read more system messages in a shorter time, the time length for reading all the system messages is decreased, and the target for decrease the power consumption of the terminal is achieved.

Description

A kind of terminal reads method and this terminal of broadcast channel
Technical field
The present invention relates to 3-G (Generation Three mobile communication system), particularly a kind of terminal reads method and this terminal of broadcast channel (BCH, Broadcast Channel).
Background technology
At present mobile communication just gradually by second generation mobile communication system to 3-G (Generation Three mobile communication system) (the3rd Generation, 3G) evolution, the power consumption of 3G terminal such as universal mobile telecommunications system (UMTS, UniversalMobile Telecommunication System) terminal becomes a very big problem.Because most of the time of terminal is to be in idle condition, so how to improve terminal such as mobile phone power saving performance, prolong the stand-by time of terminal in idle condition, become a problem demanding prompt solution.
A main activity in the idle process is the sub-district gravity treatment, and what the time was long in the gravity treatment of sub-district is the time of system for transmitting message in the reading system broadcast channel.Network is always broadcasted its system message periodically on Primary Common Control Physical Channel PCCPCH.Broadcast message in the UMTS system is to number for loop cycle with 40960ms (4096 radio frames a, radio frames is 10ms).The piece of a broadcasting of per two radio frames carrying, each broadcast blocks can only be held fixing amount of information, and when amount of information was bigger, network can be taked the mode of segmentation, and a big block of information is divided into several broadcast blocks.(TDD, Time Division Duplexing) is example with time division duplex, and system message mainly contains Master Information Block (MIB), Scheduling Block 1 (SB1, Scheduling Block 1), Scheduling Block 2 (SB2, Scheduling Block 2), with comprise SIB1, SIB2, SIB3, SIB4, SIB5, SIB6, SIB7, SIB11, SIB12, each system information block of SIB18 (SIB, System Information Block), MIB wherein, SIB1, SIB3, SIB5, SIB7 is resident precondition, necessary, but SIB11 and SIB18 are also important for normal idle process, in general, UE has only when collecting the system message of all scheduling, and satisfy resident condition simultaneously just can be resident.So system message is many more, the time of terminal read system message is long more, and power consumption is also big more.Even if in system message is under the prerequisite of fixing as for the sub-district of determining, because the Cycle Length difference of different system messages, and UE to begin the time of reading system broadcasting be at random, it also is different beginning to read the time that broadcasting may spend in the different time.
Except Master Information Block (MIB), UE can not know the schedule information of out of Memory piece in advance.The cycle of Master Information Block may be 8,16,32 in these three one.Contain the PLMN information of sub-district and the schedule information of out of Memory piece in the Master Information Block.Because Master Information Block does not have segmentation, so when this system information of subdistricts piece was many, it can not comprise all schedule informations, so except Master Information Block, also have maximum two Scheduling Blocks.The cycle and the positional information that can comprise 1 to 2 Scheduling Block (SB) in the Master Information Block.In case so terminal UE has read Master Information Block and schedule information piece, UE just can know the cycle, piece number of all system messages and every positional information.
Regulation according to the 3GPP agreement, the method that the terminal of prior art reads the system message of Web broadcast is: terminal is at first at System Frame Number (SFN, System Frame Number) mould 8 equals 0 position and seeks the MIB piece, positional information according to the Scheduling Block SB that comprises in the MIB piece, terminal reads Scheduling Block in the position of Scheduling Block, then the terminal system message of reading all needs according to the positional information of the concrete System information block SIB that comprises in the Scheduling Block.Wherein, MIB, SB, SIB have the mark TAG of oneself, and this mark is used to represent that this information is system in sometime system message.
During the each reading system broadcast channel of terminal, the SB1 and the SB2 that at first will receive MIB earlier and may exist.When receiving MIB, owing to do not know frame number, UE needs continuous read system message piece, simultaneously since the cycle of MIB exist 3 kinds may (8,16, or 32), calculate MIB cycle accurately so need read two continuous MIB.When conflict with MIB in the position of certain piece of certain system message (this is owing to allow that coarse default definition has the position of the system message of segmentation to cause in the agreement), the cycle accurate of this MIB can be used to upgrade the definite position of this piece of this system message.Because UE may begin receiving system message constantly at any one, like this with cycle 8 of the MIB of minimum, first System information block that the possibility UE of 3/4=75% receives is not MIB, the simple implementation method that receives is strict with reading schedule information earlier, the segmentation of reading schedule information again realizes, regular hour can be wasted like this, give an example, as Fig. 1, if current what read at first is the place that SFN mould 32 equals 10, this position is SIB3, owing to do not receive MIB, we can only abandon it, equal 16 place up to SFN mould 32 MIB is arranged, this time, we knew just that really equaling 10 position at SFN mould 32 has a SIB3, because we have abandoned it, even if perhaps preserved, but its mark ValueTag is invalid, we still will wait until next cycle, its cycle is 32 in this example, if could the real SIB3. that reads be SIB5 equally promptly in 42 place, possible situation can be even worse, because the schedule information of SIB5 may be in SB1, even if we are 12 like this, 14,20 frames are complete has received one two three sections of SIB5, and we must wait until that the 52nd frame could really receive SIB5.
In sum, according to prior art, the UMTS terminal begins the reading system broadcast channel in idle process time is at random, and many times, terminal need spend the long time and just can read all broadcast messages, and this just makes that the residence time of terminal is longer, and causes the power consumption of terminal in idle process to strengthen, therefore, need to seek a kind of optimization method of broadcast channel that reads to reduce the power consumption of terminal in idle condition.
Summary of the invention
The purpose of this invention is to provide method and this terminal that a kind of terminal reads broadcast channel,, thereby reached the terminal purpose of power saving so that terminal can read the system message of broadcasting in the more broadcast channel in the short period of time.
To achieve these goals, on the one hand, the method that provides a kind of terminal to read broadcast channel wherein, comprising:
Steps A, be provided with and begin to read the position, described begin to read the position for and the starting position of sub-district maximum dispatching cycle between distance less than the position of predetermined threshold value, terminal begins to read the position and begins to read system message the described broadcast channel from described, described predetermined threshold value is 16;
Step B, if the System Frame Number of the current maintenance of terminal is the described position that begins to read, then described terminal begins to read the system message in the described broadcast channel, until having read all system messages, and process ends;
If the System Frame Number of the current maintenance of terminal is not the described position that begins to read, whether the System Frame Number of the current maintenance of the described terminal of then described terminal judges satisfies default sleep condition; In this way, then described terminal enters sleep pattern; Otherwise described terminal begins to read the system message in the broadcast channel, until having read all system messages, and process ends.
Preferably, described method, wherein, described sleep condition is:
The expense that distance between the starting position of the System Frame Number of the current maintenance of described terminal and described sub-district maximum dispatching cycle enters and withdraws from greater than the sleep of setting.
Preferably, described method, wherein, among the described step B, the described step that reads the system message in the broadcast channel comprises:
Read adjacent Master Information Block and Scheduling Block continuously, and preserve Scheduling Block and the system message that reads.
Preferably, described method, wherein, among the described step B, the described step that reads system message in the described broadcast channel also comprises:
Step B1 after described terminal has read continuous two Master Information Block and Scheduling Block, judges whether to have read all system messages; In this way, process ends then; Otherwise, execution in step B2;
Step B2, judge the System Frame Number of the current maintenance of terminal and the next system message that need read System Frame Number or and the System Frame Number of the segmentation of the next one system message that need read between the distance expense that whether enters and withdraw from greater than the sleep of setting; In this way, then described terminal enters sleep pattern; Otherwise, continue to read the system message that does not receive as yet.
Preferably, described method, wherein, described step B2 also comprises:
After the described terminal that enters sleep pattern is waken up, continue to read the system message that does not receive as yet.
Preferably, described method, wherein, among the described step B, the described step that reads the system message in the broadcast channel also comprises:
If the system message that reads is the system message that corresponding schedule information is not read as yet, then preserve the system message that described schedule information is not read as yet, and the mark of the system message that is not read as yet of described schedule information is set to sky;
After reading the pairing schedule information of system message that described schedule information is not read as yet, whether the position of judging the system message that described schedule information is not read as yet is consistent with the positional information that described corresponding schedule information comprises; In this way, then upgrade the mark of the system message that described schedule information is not read as yet; Otherwise, read the corresponding to system message of positional information that position and described corresponding schedule information comprise again.Preferably, described method, wherein, the starting position of described sub-district maximum dispatching cycle can be set to mould 64 and equal 0 position, mould 128 and equal the position that 0 position or mould 256 equal 0.
On the other hand, provide a kind of terminal, comprising: the broadcast channel read module, wherein, described broadcast channel read module comprises:
Begin to read the position module is set, be used for and the starting position of sub-district maximum dispatching cycle between distance be set to begin to read the position less than the position of predetermined threshold value, terminal begins to read the position and begins to read system message the described broadcast channel from described, and described predetermined threshold value is 16;
Read module, be used for System Frame Number in the current maintenance of terminal and be describedly beginning to read under the situation of position, perhaps when the System Frame Number of the current maintenance of terminal does not satisfy default sleep condition for the described System Frame Number that begins to read position and the current maintenance of terminal, begin to read the system message in the described broadcast channel, until having read all system messages, and process ends;
The first sleep module is used for making described terminal enter sleep pattern when the System Frame Number of the current maintenance of terminal does not satisfy default sleep condition for the described System Frame Number that begins to read position and the current maintenance of terminal.
Preferably, described terminal, wherein, described read module comprises:
Reading submodule is used for reading continuously adjacent Master Information Block and Scheduling Block, and preserves Scheduling Block and the system message that reads;
Read the judge module that finishes, be used for after described terminal has read continuous two Master Information Block and Scheduling Block, judging whether to have read all system messages;
The second sleep module, be used for the System Frame Number of the System Frame Number of the current maintenance of terminal and the next system message that need read or and the System Frame Number of the segmentation of the next one system message that need read between the situation of the distance expense that enters and withdraw from greater than the sleep of setting under, make described terminal enter sleep pattern.
Preferably, described terminal, wherein, described read module also comprises:
The sleep module of waking up is used for continuing to read the system message that does not receive as yet after the described terminal that enters sleep pattern is waken up.
Preferably, described terminal, wherein, described read module also comprises:
The system message mark is provided with module, is used for when reading the system message that corresponding schedule information is not read as yet, and the mark of the system message that described schedule information is not read as yet is set to sky;
The system message judge module, be used for after reading the pairing schedule information of system message that described schedule information is not read as yet, judging whether the position of the system message that described schedule information is not read as yet is consistent with the positional information that described corresponding schedule information comprises; In this way, then upgrade the mark of the system message that described schedule information is not read as yet; Otherwise, read the corresponding to system message of positional information that position and described corresponding schedule information comprise again.
Technique effect of the present invention is:
In the technical scheme of the present invention, by selecting a suitable position to begin to read the system message of broadcast channel, read maximum system messages with the shortest time, can be continuously read system information repeatedly not substantially, reduced the number of time of reading whole system messages and the system information block that reads, make terminal can read the system information that all have scheduling in the short period of time, shortened the resident time of terminal, reduced the power consumption of terminal;
Further, in the preferred technical solution of the present invention, in the process of the system message that reads broadcasting,, can further reduce the terminal power consumption by making terminal sleep when not having the new system message that does not receive as yet;
Further, in the preferred technical solution of the present invention, by preserving the system message that all receive prior to schedule information, can significantly reduce the time of sub-district gravity treatment, and further reduce the terminal power consumption.
Description of drawings
Fig. 1 reads the schematic flow sheet of the method for broadcast channel for the terminal of one embodiment of the invention;
Fig. 2 is in the prior art, and be the system message scheduling graph of a sub-district of 64 radio frames the maximum dispatching cycle of system information;
Fig. 3 is in the prior art, and be the system message scheduling graph of a sub-district of 128 radio frames the maximum dispatching cycle of system information;
Fig. 4 is in the prior art, and be the system message scheduling graph of a sub-district of 256 radio frames the maximum dispatching cycle of system information;
Fig. 5 reads the schematic flow sheet of the method for broadcast channel for the terminal of another embodiment of the present invention;
Fig. 6 is the structural representation of the terminal of the embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the accompanying drawings and the specific embodiments.
Fig. 1 reads the schematic flow sheet of the method for broadcast channel for the terminal of one embodiment of the invention.As Fig. 1, the method that the terminal of one embodiment of the invention reads broadcast channel BCH comprises the steps:
Step 101, and the distance between the starting position of sub-district maximum dispatching cycle is set to begin to read the position less than the position of predetermined threshold value, terminal begins to read the position and begins to read system message the described broadcast channel from described; Wherein, described sub-district can be in the sub-district that exists in the network of selecting any, and the sub-district is maximum dispatching cycle that exist in the sub-district, system message maximum dispatching cycle;
Step 102, if the System Frame Number of the current maintenance of terminal is the described position that begins to read, then described terminal begins to read the system message in the described broadcast channel, until having read all system messages, and process ends.
Further, in this embodiment of the present invention, after terminal began to receive broadcasting, if the System Frame Number of the current maintenance of terminal is not the described position that begins to read, whether the System Frame Number of the current maintenance of the described terminal of then described terminal judges satisfied default sleep condition; In this way, then described terminal enters sleep pattern; Otherwise described terminal begins to read the system message in the broadcast channel, until having read all system messages, and process ends.
In this embodiment of the present invention, exemplary, described sleep condition is:
The expense that the System Frame Number of the current maintenance of described terminal and the described distance that begins to read between the position enter and withdraw from greater than the sleep of setting.
In concrete the application, when terminal will receive the system message of broadcasting, can utilize the method for this embodiment of the invention to begin to read the setting of position at every turn, and begin read system message beginning to read the position, until having read all system messages.
In the embodiments of the invention, when terminal UE generation gravity treatment, by beginning to receive the system message that broadcasting promptly begins to read broadcasting a suitable position, can receive system with more message with the short time, or even receive maximum system messages with the shortest time, reduced and read the resident required time that whole system message spent, thereby reduced the power consumption of terminal.And further, in receiving course,, the time of reading resident required whole system messages can be reduced further by preserving the system message that all obtain prior to schedule information as much as possible; And further, in receiving course, if the frame number of the system message that the UE next one will receive has the sufficiently long time apart from the frame number of the current maintenance of terminal, then UE can enter sleep pattern, like this, makes more power saving of terminal.
In the network of reality, be can be 32 radio frames, 64 radio frames, 128 radio frames, 256 radio frames etc. the maximum dispatching cycle of the system message of sub-district maximum dispatching cycle of sub-district.When below gravity treatment being taken place the sub-district under 64 radio frames, 128 radio frames and 256 these three kinds of situations of radio frames, the method that terminal reads BCH describes.
Fig. 2 is in the prior art, and be the system message scheduling graph of a sub-district of 64 radio frames (radio frame) the maximum dispatching cycle of system information.For the sub-district of the type, system comprises by all system messages of broadcast channel broadcasts: MIB, SB1, SIB1, SIB2, SIB3, SIB5-1, SIB5-2, SIB5-3, SIB7, SIB11-1, SIB11-2.Read method according to the embodiment of the invention, predetermined threshold value is 0, what frame number mould 64 is set is zero position and be broadcast system message begins to read the position, be that terminal is that zero position begins to receive the system message that promptly reads broadcasting at frame number mould 64, then the position terminal to System Frame Number 28 just reads the resident required whole system messages that are over, because every frame time is 10ms, the time of then having read resident required all system messages is (28-0) * 10=280ms.
And, read method according to prior art, do not begin to read the position if be not provided with, but the words that read at random, its position that begins to read be change and can be any position, for example, if terminal equals 16 position particularly as at System Frame Number (SFN at mould 64, System Frame Number) be that 16 position is when beginning to read, terminal has at first been read MIB at the 16th frame, just receive the final stage of SIB5 up to the 52nd frame, need expend (52-16) * 10=360ms like this and read required whole system messages.
Obviously, utilize the BCH method that reads of the embodiment of the invention to reduce the time of reading resident required whole system messages, thus and minimizing power consumption.
Fig. 3 is in the prior art, and be the system message scheduling graph of a sub-district of 128 radio frames the maximum dispatching cycle of system information.As Fig. 3, for the sub-district of the type, system comprises by all system messages of broadcast channel broadcasts: MIB, SB1, SIB1, SIB2, SIB3, SIB5-1, SIB5-2, SIB5-3, SIB7, SIB11-1, SIB11-2, SIB11-3, SIB11-4, SIB11-5, SIB11-6, SIB11-7, SIB18-1, SIB18-2, SIB18-3, SIB18-4, SIB 18-5.Wherein, system message SIB11 is that system message 11 has 7 segmentations, is divided into 7 System information block transmission; SIB18 has 5 segmentations, is divided into 5 System information block transmission.Read method according to the embodiment of the invention, predetermined threshold value is 0, what frame number mould 128 is set is zero position and be system message begins to read the position, be that terminal is that zero position begins receiving system message at frame number mould 128, then to the position of System Frame Number 122 promptly the position terminal of the 122nd frame just read the resident required whole system messages that are over, the time of promptly receiving all system messages is (122-0) * 10=1220ms.And, further, because terminal is SIB11-3 in the 3rd segmentation that the 30th frame receives SIB11, and its SIB11-4 that will read is positioned at the 54th frame, distance between two sections is 14 frames, and the expense that common sleep enters and withdraws from ability 2,3 frames, so after UE is received the SIB11-3 segmentation, can sleep behind the frame of (54-30)=24, waking up at the 54th frame receives the SIB11-4 segmentation.Same reason, because UE receives the system message of SIB11-7 segmentation at the 62nd frame, and the disappear position of 18 breath segmentation SIB18-1 of the next system that will receive is the 90th frame, so, terminal (90-62)=28 frame of after receiving SIB11-7 section system message, can sleeping; Equally, terminal after receiving SIB18-3, (118-94)=24 frame of can sleeping.So, if terminal at 11-3 and 11-4,11-7 and 18-1, and sleep between 18-3 and the 18-4, (54-30)+(90-62)+(118-94)=76 frame of can sleeping, the running time of terminal receiving system message is (122-76) * 10=460ms.
For the sub-district of the type, mould 128 also can be set equal 8 position for beginning to read the position, then terminal time of receiving all system messages of broadcasting is (122-8) * 10=1140ms.And, if at 11-7 and 18-1, and sleep between 18-3 and the 18-4, (90-62)+(118-94)=52 frame of can sleeping, running time is (114-52) * 10=620ms.Under the situation of the time that adds sleep, equaling 8 position at mould 128, to begin to receive when promptly reading the time of reception that expends when beginning to receive than the position that at mould 128 is zero longer.
For the sub-district of the type, mould 128 also can be set equal 16 position for beginning to read the position, then to receive the time of reception of all system messages of broadcasting be (122-16) * 10=1060ms to terminal.And, if at 11-7 and 18-1, and sleep between 18-3 and the 18-4, (90-62)+(118-94)=52 frame of can sleeping, running time is (106-52) * 10=540ms.Under the situation of the time that adds sleep, equal 16 position at mould 128 and begin to receive when promptly reading that to begin time of reception than the position that at mould 128 is zero longer.
And, read method according to prior art, do not begin to read the position if be not provided with, but read at random, its position that begins to read be change and can be any position, for example, equaling 24 position at mould 128 and begin read system message, is after schedule information collects as what adopt, again Chong Zu method, then SFN one two three sections grades equaling 26 SIB11 all can abandon, and are (128+62) * 10=1700ms so read the time of all system messages.When this position begins to read, even terminal is at 11-3 and 11-4,11-7 and SIB7, and sleep between 18-3 and the 18-4, (54-30)+(86-62)+(118-94)=72 frame owing to can sleep is so the running time of terminal still is (170-72) * 10=980ms.
So if do not select suitable beginning to read the position but read at random, terminal reads all system message consumed time might reach 1700ms.And, can reduce and read all system message consumed time, thereby reduce the terminal power consumption by reading in place.
In Fig. 4 prior art, be the system message scheduling graph of a sub-district of 256 radio frames the maximum dispatching cycle of system information.For the sub-district of the type, system comprises by all system messages of broadcast channel broadcasts: MIB, SB1, SIB1, SIB2, SIB3, SIB5-1, SIB5-2, SIB5-3, SIB7, SIB11-1, SIB11-2, SIB11-3, SIB11-4, SIB11-5, SIB11-6, SIB11-7, SIB11-8, SIB18-1, SIB18-2, SIB18-3, SIB18-4, SIB18-5.Wherein, system message SIB11 has 8 segmentations, and SIB18 has 5 segmentations.Read method according to the embodiment of the invention, predetermined threshold value is 0, frame number mould 256 be set be zero position for beginning to read the position, be that terminal is zero position receiving system message at frame number mould 256, then the position to frame number 62 runs through whole system messages, and the time of promptly receiving all system messages is (62-0) * 10=620ms.And, further, terminal (36-30)=6 frame of can also between 11-3 and 11-4, sleeping, like this, the operating time of terminal reality is (62-6) * 10=560ms.
If equal 8 position begins to read at mould 256, if strict by reading schedule information (comprising that continuous reception MIB calculates the cycle of MIB accurately) earlier terminal receive the time of resident required all system messages and be (256+14) * 10=2700ms (because SIB3 after the MIB, SIB7, SIB5-1 can not abandon because the cycle of MIB does not determine).If between SIB11-3 and SIB11-4, between SIB2 and the SIB3, and sleep between the next cycle of SIB7 (position that mould 256 equals 140) and SIB7, (36-30)+(138-70)+128=202 frame of can sleeping, running time is (270-202) * 10=620ms.Equal 8 position with mould 256 when beginning to read the position, between present frame and the next frame that needs to receive, sleep, can reduce consumed time as terminal, and if preserve the SIB that comprises between the continuous reception MIB, then need (72-8) * 10=540ms.
If equal 16 place begins to read at mould 256, because MIB and SB1 in succession and receive, has only SIB5 because first segmentation does not receive, need to wait again the cycle of a SIB5, actual time of reception is that time for reading is (256+6) * 10=2620ms, if between 11-3 and 11-4, SIB2 (70 frame) and SIB3 (138 frame), and the words of sleeping between the next cycle of SIB7 and SIB7, (36-30)+(138-70)+128=202 frame of can sleeping,, running time is (262-202) * 10=600ms, so that the reality that adds sleep still can begin time of reception than the place that at mould 128 is zero is longer.
Read if equal 0 place at mould 24, and reorganization again after schedule information collects, all can abandon so SFN equals one two three segmentations of 26 SIB11 etc., so the time that needs is (256+22) * 10=2780ms at last.If UE between 11-3 and 11-4, SIB2 and SIB3, and sleep between the next cycle of SIB7 and SIB7, (138-70)+128+ (36-30)=202 frame of can sleeping, running time is (278-202) * 10=760ms.
So, if do not select suitable beginning to read the position but read at random, terminal reads all system message consumed time might reach 2780ms, and by reading in place, can reduce and read all system message consumed time, thereby reduce the terminal power consumption.
In the network of reality, be that 128 sub-district probably accounts for about 80% the maximum dispatching cycle of system message, and be 64 and 256 have about 20% the maximum dispatching cycle of system message, and seldom arranged maximum dispatching cycle is 32 and other the sub-district of dispatching cycle.If we choose the position that a mould 128 equals 0, the sub-district for 80% is suitable; For the sub-district that is 64 maximum dispatching cycle, the resident time has 50% possibility elongated, but power consumption do not increase, because the time that prolongs is basically at sleep state; There is 50% possibility sub-district for being 256 maximum dispatching cycle, and mould 128 equals 0 local mould 256 simultaneously and also equals 0, and such 50% probability is optimum; Analyze maximum dispatching cycle and be in 256 the sub-district other 50%, as can be seen from Figure 4, terminal can be read system message 7 at the 128-140 frame, continues sleep 128 frames then, receive the system message of all broadcasting reading the 14-60 frame, such running time of spending also is the shortest.Therefore, preferably, in actual applications, equal 0 position apart from mould 128 uniformly and be set to begin to read the position, can obtain preferable effect less than the position of predetermined threshold.
Fig. 5 reads the schematic flow sheet of the method for BCH for the terminal of another embodiment of the present invention.In this embodiment, terminal begins read system message at System Frame Number mould 128 less than 16 position.As Fig. 5, the method that the terminal of this embodiment of the invention reads BCH comprises the steps:
Step 501, terminal determine gravity treatment and begin to receive broadcasting;
Step 502, whether mould 128 is less than 16 by checking the System Frame Number of judging current maintenance for terminal; In this way, execution in step 503 then; Otherwise, execution in step 506; Wherein, in concrete the application, exemplarily, terminal can be checked and judge the next System Frame Number that can receive broadcasting whether mould 128 is less than 16 in this step;
Step 503 judges that present frame equals 0 frame number apart from mould 128 and whether can sleep; In this way, execution in step 504 then; Otherwise, execution in step 506; Exemplarily, equaling the expense that the distance between 0 the frame number enters and withdraw from greater than the sleep of setting as present frame and mould 128 then determines and can sleep; Otherwise, cannot sleep;
Step 504, terminal is calculated the time that can sleep, goes forward side by side into sleep pattern;
Step 505, after terminal is waken up, execution in step 506;
Step 506, terminal read adjacent MIB and SB continuously;
Step 507, terminal is preserved the SB and the SIB that may read, comprise and preserve the system message SIB that corresponding schedule information is not read as yet, the system message that is not read as yet for these schedule informations, terminal also when reading these system messages, is set to sky (Null) with its mark (ValueTag);
Step 508 judges whether two continuous MIB have read and SB also receives; In this way, execution in step 509 then; Otherwise, change execution in step 506 over to;
Step 509 judges whether to receive all system messages; In this way, then change step 514 over to; Otherwise, execution in step 510;
Enough whether the position of the frame number of the frame number of the system message that step 510, the System Frame Number of judging the current maintenance of terminal need read apart from the next one or the segmentation of the next system message that need read sleep; In this way, execution in step 512 then; Otherwise, execution in step 511; Exemplarily, as the expense that the distance between the position of the frame number of the segmentation of the frame number of the frame number of present frame and the next system message that need read or the next system message that need read enters and withdraws from greater than sleep, then determine enough to sleep; Otherwise, not enough sleep;
Step 511, read the SIB that does not receive as yet by schedule information, if exist among the system message SIB that reads when not receiving the system message that receives earlier before the schedule information as yet, judge whether the position of these system messages is consistent with the positional information that schedule information is comprised; In this way, then upgrade the ValueTag of these system messages that before corresponding schedule information is read, read earlier, and continue to receive other SIB that does not receive as yet, then, execution in step 509; Otherwise, continue again corresponding to this system message of positional information and other system message that does not receive as yet that receiving position and this schedule information comprise, execution in step 509;
Step 512, terminal is calculated the time that can sleep, enters sleep pattern;
Step 513, UE wakes up, and changes execution in step 511 over to;
Step 514, system message receives, process ends.
The flow process that reads system message the broadcast channel from the terminal of this embodiment of the invention described above is as can be seen: can guarantee to begin in place read system message in the method for this embodiment of the invention, and reading in the process after the beginning read system message, also can when can sleeping, enter sleep as far as possible, thereby have preferable power saving effect.
The embodiment of the invention also discloses a kind of terminal.Fig. 6 is the structural representation of the terminal of the embodiment of the invention.As Fig. 6, the terminal 600 of the embodiment of the invention comprises: broadcast channel read module 601 is characterized in that described broadcast channel read module 601 comprises:
Begin to read the position module 602 is set, be used for and the starting position of sub-district maximum dispatching cycle between distance be set to begin to read the position less than the position of predetermined threshold value, terminal begins to read the position and begins to read system message the described broadcast channel from described; Wherein, described sub-district can be in the sub-district that exists in the network of selecting any, and the sub-district is maximum dispatching cycle that exist in the sub-district, system message maximum dispatching cycle;
Read module 603, the System Frame Number that is used in the current maintenance of terminal is that described the beginning read under the situation of position, begins to read the system message in the described broadcast channel, until having read all system messages, and process ends.
Preferably, in the terminal of this embodiment, the broadcast channel read module also comprises:
The first sleep module is used for making described terminal enter sleep pattern when the System Frame Number of the current maintenance of terminal does not satisfy default sleep condition for the described System Frame Number that begins to read position and the current maintenance of terminal.
Preferably, in the terminal of this embodiment, read module comprises:
Reading submodule is used for reading continuously adjacent Master Information Block and Scheduling Block, and preserves Scheduling Block and the system message that reads;
Read the judge module that finishes, be used for after described terminal has read continuous two Master Information Block and Scheduling Block, judging whether to have read all system messages;
The second sleep module, be used for the System Frame Number of the System Frame Number of the current maintenance of terminal and the next system message that need read or and the System Frame Number of the segmentation of the next one system message that need read between the situation of the distance expense that enters and withdraw from greater than the sleep of setting under, make described terminal enter sleep pattern.
Preferably, in the terminal of this embodiment, read module also comprises:
The sleep module of waking up is used for continuing to read the system message that does not receive as yet after the described terminal that enters sleep pattern is waken up.
Preferably, in the terminal of this embodiment, read module also comprises continuously:
The system message mark is provided with module, is used for when reading the system message that corresponding schedule information is not read as yet, and the mark of the system message that described schedule information is not read as yet is set to sky;
The system message judge module, be used for after reading the pairing schedule information of system message that described schedule information is not read as yet, judging whether the position of the system message that described schedule information is not read as yet is consistent with the positional information that described corresponding schedule information comprises; In this way, then upgrade the mark of the system message that described schedule information is not read as yet; Otherwise, read the corresponding to system message of positional information that position and described corresponding schedule information comprise again.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in 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 protection scope of the present invention.

Claims (11)

1. a terminal reads the method for broadcast channel, it is characterized in that, comprising:
Steps A, be provided with and begin to read the position, described begin to read the position for and the starting position of sub-district maximum dispatching cycle between distance less than the position of predetermined threshold value, terminal begins to read the position and begins to read system message the described broadcast channel from described, described predetermined threshold value is 16;
Step B, if the System Frame Number of the current maintenance of terminal is the described position that begins to read, then described terminal begins to read the system message in the described broadcast channel, until having read all system messages, and process ends;
If the System Frame Number of the current maintenance of terminal is not the described position that begins to read, whether the System Frame Number of the current maintenance of the described terminal of then described terminal judges satisfies default sleep condition; In this way, then described terminal enters sleep pattern; Otherwise described terminal begins to read the system message in the broadcast channel, until having read all system messages, and process ends.
2. method according to claim 1 is characterized in that, described sleep condition is:
The expense that distance between the starting position of the System Frame Number of the current maintenance of described terminal and described sub-district maximum dispatching cycle enters and withdraws from greater than the sleep of setting.
3. method according to claim 1 and 2 is characterized in that, among the described step B, the described step that reads the system message in the broadcast channel comprises:
Read adjacent Master Information Block and Scheduling Block continuously, and preserve Scheduling Block and the system message that reads.
4. method according to claim 3 is characterized in that, among the described step B, the described step that reads system message in the described broadcast channel also comprises:
Step B1 after described terminal has read continuous two Master Information Block and Scheduling Block, judges whether to have read all system messages; In this way, process ends then; Otherwise, execution in step B2;
Step B2, judge the System Frame Number of the current maintenance of terminal and the next system message that need read System Frame Number or and the System Frame Number of the segmentation of the next one system message that need read between the distance expense that whether enters and withdraw from greater than the sleep of setting; In this way, then described terminal enters sleep pattern; Otherwise, continue to read the system message that does not receive as yet.
5. method according to claim 4 is characterized in that, described step B2 also comprises:
After the described terminal that enters sleep pattern is waken up, continue to read the system message that does not receive as yet.
6. method according to claim 3 is characterized in that, among the described step B, the described step that reads the system message in the broadcast channel also comprises:
If the system message that reads is the system message that corresponding schedule information is not read as yet, then preserve the system message that described schedule information is not read as yet, and the mark of the system message that is not read as yet of described schedule information is set to sky;
After reading the pairing schedule information of system message that described schedule information is not read as yet, whether the position of judging the system message that described schedule information is not read as yet is consistent with the positional information that described corresponding schedule information comprises; In this way, then upgrade the mark of the system message that described schedule information is not read as yet; Otherwise, read the corresponding to system message of positional information that position and described corresponding schedule information comprise again.
7. method according to claim 1 is characterized in that, the starting position of described sub-district maximum dispatching cycle can be set to mould 64 and equal 0 position, mould 128 and equal the position that 0 position or mould 256 equal 0.
8. terminal, comprising: the broadcast channel read module is characterized in that described broadcast channel read module comprises:
Begin to read the position module is set, be used for and the starting position of sub-district maximum dispatching cycle between distance be set to begin to read the position less than the position of predetermined threshold value, terminal begins to read the position and begins to read system message the described broadcast channel from described, and described predetermined threshold value is 16;
Read module, be used for System Frame Number in the current maintenance of terminal and be describedly beginning to read under the situation of position, perhaps when the System Frame Number of the current maintenance of terminal does not satisfy default sleep condition for the described System Frame Number that begins to read position and the current maintenance of terminal, begin to read the system message in the described broadcast channel, until having read all system messages, and process ends;
The first sleep module is used for making described terminal enter sleep pattern when the System Frame Number of the current maintenance of terminal does not satisfy default sleep condition for the described System Frame Number that begins to read position and the current maintenance of terminal.
9. terminal according to claim 8 is characterized in that, described read module comprises:
Reading submodule is used for reading continuously adjacent Master Information Block and Scheduling Block, and preserves Scheduling Block and the system message that reads;
Read the judge module that finishes, be used for after described terminal has read continuous two Master Information Block and Scheduling Block, judging whether to have read all system messages;
The second sleep module, be used for the System Frame Number of the System Frame Number of the current maintenance of terminal and the next system message that need read or and the System Frame Number of the segmentation of the next one system message that need read between the situation of the distance expense that enters and withdraw from greater than the sleep of setting under, make described terminal enter sleep pattern.
10. terminal according to claim 9 is characterized in that, described read module also comprises:
The sleep module of waking up is used for continuing to read the system message that does not receive as yet after the described terminal that enters sleep pattern is waken up.
11. terminal according to claim 9 is characterized in that, described read module also comprises:
The system message mark is provided with module, is used for when reading the system message that corresponding schedule information is not read as yet, and the mark of the system message that described schedule information is not read as yet is set to sky;
The system message judge module, be used for after reading the pairing schedule information of system message that described schedule information is not read as yet, judging whether the position of the system message that described schedule information is not read as yet is consistent with the positional information that described corresponding schedule information comprises; In this way, then upgrade the mark of the system message that described schedule information is not read as yet; Otherwise, read the corresponding to system message of positional information that position and described corresponding schedule information comprise again.
CN2008101011173A 2008-02-28 2008-02-28 Method for terminal to read broadcasting channel and terminal thereof Expired - Fee Related CN101232737B (en)

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