CN100479548C

CN100479548C - Method and device for transmitting system message

Info

Publication number: CN100479548C
Application number: CNB2006100944278A
Authority: CN
Inventors: 赵治林; 蔡涛; 伏玉笋
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2006-06-21
Filing date: 2006-06-21
Publication date: 2009-04-15
Anticipated expiration: 2026-06-21
Also published as: CN101001459A; WO2008000185A1

Abstract

This invention discloses a method for transmitting system information including: A, a base station maps the system information to BCH and DL-SCH, B, the dispatcher of the base station gets demodulation physical signaling of the DL-SCH channel and transmits the signaling, the BCH data block and the DL-SCH data block loading system information, C, a UE gets the system information and the demodulation physical signaling in the BCH data block and gets the system information loaded in the DL-SCH data block based on the physical signaling. This invention also discloses a device for transmitting system information.

Description

A kind of method of transfer system message and device

Technical field

The present invention relates to wireless communication technology, refer to a kind of method and device of transfer system message especially.

Background technology

Since first commercial version Realse99 of third generation collaborative project (3GPP) issue universal mobile telecommunications system (UMTS), the 3GPP organizational member continues network is improved, in the hope of obtaining more network characteristic and better network performance.Wherein the R5 version of issue in 2003 has been introduced the descending access (HSDPA of high-speed packet, High Speed Downlink Packet Access) and the R6 version of issue in 2005 introduced high-speed upward grouped data access (HSUPA, High Speed UplinkPacket Access) and make the wireless access performance of Wideband Code Division Multiple Access (WCDMA) cell mobile communication systems (WCDMA) obtain great lifting.

For the evolution of UMTS Radio Access Network (RAN), most of equipment producer is divided into evolution in mid-term and two stages of Long Term Evolution with the evolution stage.The main purpose of evolution in mid-term is that existing network is not done to optimize as much as possible under the too cataclysmal prerequisite, but Long Term Evolution then is conceived to the innovation that existing network carries out some essence is improved the systematic function of Radio Access Network.

Along with the introducing of R5, R6 version HSDPA, HSUPA and multimedia broadcast-multicast service characteristics such as (MBMS) and perfect, the UMTS network has been finished the evolution stage in mid-term.Network performance that HSDPA and HSUPA brought promotes the business demand that can satisfy substantially before 2010, and compares with other cellular networks and to possess enough competitiveness.The long evolving system of UMTS network (LTE) research and development will also be brought into schedule along with HSUPA and MBMS technology are day by day ripe in the end of the year 2004.

In any one system, system message all is that the base station sends to the very important message of UE.Carry out must at first obtaining the system message that inserts the sub-district after Cell searching and access finish at portable terminal (UE), UE could carry out proper communication after having only the system message of having obtained in the sub-district.

In present system, comprise WCDMA, mainly utilize the system message of the next UE broadcast transmission sub-district in the sub-district of descending logic channel of a Broadcast Control Channel (BCCH) by name.Because the information on the logic channel only is carried on the corresponding transmission channel, could realize transmission of Information, therefore, the full content on the BCCH channel is mapped on the transmission channel of a broadcast channel (BCH) by name usually.But because the BCH channel has set form, and fixedly mean and to make full use of frequency resource and base station transmitting power resource, finally cause the decline of cell capacity and throughput.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of method of transfer system message, uses this method and can realize transmitting BCCH channel system message jointly by BCH channel and DL-SCH channel.

Another main purpose of the present invention is to provide a kind of device of transfer system message, uses this device and can realize transmitting BCCH channel system message jointly by BCH channel and DL-SCH channel.

For achieving the above object, technical scheme of the present invention is achieved in that

A kind of method of transfer system message may further comprise the steps:

A, base station map to broadcast channel BCH and DSCH Downlink Shared Channel DL-SCH with system message;

B, base station scheduling obtain the demodulation physics signaling of DL-SCH channel, and described demodulation physics signaling, the DL-SCH data block that carries the BCH data block of system message and carry system message are sent;

C, user terminal UE obtain the system message of being carried in demodulation physics signaling and the BCH data block, and obtain the system message of being carried in the DL-SCH data block according to the demodulation physics signaling that is obtained.

Wherein, among the step B, described transmission demodulation physics signaling is: demodulation physics signaling bear in described BCH data block, is sent the described BCH data block that carries demodulation physics signaling;

Among the step C, described acquisition demodulation physics signaling is: obtain demodulation physics signaling from the BCH data block.

Wherein, described demodulation physics signaling comprises: the size of the size of the modulation system of DL-SCH data block, DL-SCH data block, DL-SCH data block physical resource, the activationary time of DL-SCH data block, the frequency location of DL-SCH data block physical resource and the coded system of DL-SCH data block.

Wherein, among the step C, described demodulation physics signaling according to acquisition is obtained the system message of being carried in the DL-SCH data block and is:

C11, UE are according to the activationary time of demodulation physics signaling bear, and entry time length is the sleep state of activationary time;

C12, when being awake, the temporal information of carrying in the size of UE according to DL-SCH data block physical resource obtains shining upon the temporal information of DL-SCH data block; The bandwidth of carrying in the size according to the frequency location of the DL-SCH data block physical resource of BCH carrying and DL-SCH data block physical resource obtains shining upon the frequency information of DL-SCH data block;

C13, utilize the modulation system of DL-SCH data block, the orthogonal frequency-division multiplex singal of determining according to the temporal information that obtains and frequency information is carried out demodulation, obtain the demodulation result of DL-SCH data block;

C14, UE decipher described demodulation result according to the size of DL-SCH data block and the coded system of DL-SCH data block, obtain the system information of DL-SCH data block carrying.

In addition, further comprise among the step B: with demodulation physics signaling bear to the physical layer signaling channel;

Sending demodulation physics signaling described in the step B is: send the physical layer signaling data block that carries demodulation physics signaling;

Obtaining demodulation physics signaling described in the step C is: obtain described demodulation physics signaling from the physical layer signaling data block.

In addition, among the step B, the further bearing activation time in the BCH data block;

Among the step C, described acquisition demodulation physics signaling is:

C21, UE obtain activationary time from the BCH data block, and entry time length is the sleep state of activationary time;

C22, when activationary time arrives, UE reads the demodulation physics signaling that the physical layer signaling data block obtains carrying.

Wherein, described activationary time is: the activationary time that activationary time that is set in advance by the base station or base station are determined according to scheduling.

In addition, among the step B, further carrier band information in the BCH data block;

Among the step C, described acquisition demodulation physics signaling is:

UE obtains sub-band information from the BCH data block, monitor the physical layer signaling channel according to sub-band information, reads the physical layer signaling data block and obtains the wherein demodulation physics signaling of carrying.

Wherein, described sub-band information is: single sub-band or the group of subbands of being made up of a plurality of sub-bands.

Wherein, described sub-band information is: the sub-band information that sub-band information that is set in advance by the base station or base station are determined according to scheduling.

A kind of device of transfer system message comprises transmitting element and receiving element at least; Wherein,

Transmitting element is used for system message is mapped to BCH channel and DL-SCH channel; And obtain the demodulation physics signaling of DL-SCH channel, described demodulation physics signaling, the DL-SCH data block that carries the BCH data block of system message and carry system message are sent;

Receiving element is used for obtaining the demodulation physics signaling of transmitting element transmission and the system message that described BCH data block is carried; And obtain the system message of carrying in the DL-SCH data block that described transmitting element sends according to the demodulation physics signaling that is obtained.

Wherein, described transmitting element is positioned at the base station; Described receiving element is positioned at UE.

The method of a kind of transfer system message provided by the present invention, send to UE by the demodulation physics signaling that will be used for demodulation DL-SCH data block, UE utilizes demodulation physics signaling that the DL-SCH data block of having carried BCCH channel system message is carried out demodulation, the BCCH channel system message that acquisition is wherein carried, realized that the base station maps to BCH channel and DL-SCH channel with the BCCH system message, UE obtains the method for BCCH system message by BCH channel and DL-SCH channel.In addition, the present invention provides a kind of device of transfer system message again.Method and apparatus provided by the present invention has fully been saved the UE power consumption, has utilized frequency resource and base station transmitting power resource, has improved cell capacity and throughput.

Description of drawings

Fig. 1 is the basic flow sheet of the inventive method;

Fig. 2 is the flow chart of the embodiment of the invention one transmitting system message;

Fig. 3 obtains the flow chart of system message for the embodiment of the invention one;

Fig. 4 is a LTE physical resource schematic diagram;

Fig. 5 is BCH data block and DL-SCH data block time-domain position graph of a relation;

Fig. 6 is for reading the flow chart of DL-SCH data block method in the embodiment of the invention one;

Fig. 7 is the flow chart of the embodiment of the invention two transmitting system message;

Fig. 8 obtains the flow chart of system message for the embodiment of the invention two;

Fig. 9 is BCH data block, physical layer signaling data block and DL-SCH data block time-domain position graph of a relation;

Figure 10 is the flow chart of the embodiment of the invention three transmitting system message;

Figure 11 obtains the flow chart of system message for the embodiment of the invention three;

Figure 12 is the structure chart of transfer system information apparatus of the present invention.

Embodiment

In the LTE system, newly introduced DSCH Downlink Shared Channel (DL-SCH, Downlink SharedChannel), this channel is a dynamic channel, can make full use of frequency resource and base station transmitting power resource, improves cell capacity and throughput.Therefore, in the LTE system, the present invention can consider to utilize the DL-SCH channel to come the system message of carrying the BCCH channel jointly with the BCH channel.

Because the characteristic of DL-SCH shared channel, DL-SCH Channel Transmission form is unfixing, therefore before the BCCH channel system message that UE carries in reading the DL-SCH channel, must at first obtain the demodulation physics signaling of described DL-SCH channel, so that correctly the DL-SCH data block of bearing system message is carried out demodulation.Therefore, realize that the key of being carried BCCH channel system message by BCH channel and DL-SCH channel jointly is: how to make UE obtain to have shone upon the DL-SCH data block demodulation physics signaling of BCCH channel system message.

The basic procedure of the inventive method specifically may further comprise the steps as shown in Figure 1:

Step 101: the base station maps to broadcast channel BCH and DSCH Downlink Shared Channel DL-SCH with system message;

Step 102: base station scheduling obtains the demodulation physics signaling of DL-SCH channel, and described demodulation physics signaling, the DL-SCH data block that carries the BCH data block of system message and carry system message are sent;

Step 103: user terminal UE obtains the system message and the demodulation physics signaling of being carried in the BCH data block, and obtains the system message of being carried in the DL-SCH data block according to the demodulation physics signaling that is obtained.

Here, the DL-SCH data block is the data block of having carried BCCH channel system message, is not always the case if hereinafter particularly point out, although the DL-SCH data block can also be carried the data block of other logic channel.Simultaneously, do not particularly point out as having in the following description, system message is the system message for carrying on the BCCH channel then.

For making purpose of the present invention, technical scheme and advantage clearer, below enumerate three embodiment, the present invention is described in further detail.

What wherein, embodiment one described is: utilize the BCH channel to carry the embodiment of DL-SCH channel demodulation physics signaling; What embodiment two described is: the embodiment of being carried DL-SCH channel demodulation physics signaling by another physical layer signaling channel in the LTE system; What embodiment three described is: the further optimization on embodiment two bases.

Embodiment one

In the present embodiment, owing to be by the fixing BCH data block carrying DL-SCH demodulation physics signaling of form, therefore for finishing the described method of present embodiment, need set in advance the form of the BCH data block of having carried demodulation physics signaling, so that the BCH data block that UE can normal process receives.

The process of base station transmission system message specifically is described below as shown in Figure 2:

Step 201: the base station will be mapped to respectively by the system message of BCCH channel bearing on two transmission channels of BCH channel and DL-SCH channel.

Step 202: the base station obtains described demodulation physics signaling of having carried the DL-SCH data block of system message by the scheduling of medium access control (Media Access Control) MAC layer.

Because the DL-SCH channel is a shared channel, therefore loaded information also is not a BCCH channel system message on the DL-SCH channel.Therefore, the base station must finally send in which kind of mode according to the DL-SCH channel that all information of being carried on the DL-SCH channel have determined to carry BCCH channel system message.Determine the send mode of DL-SCH, also just determined the demodulation physics signaling of DL-SCH data block.

Here, the DL-SCH channel of carrying BCCH channel system information specifically sends in which way and then embodies by demodulation physics signaling.Wherein, demodulation physics signaling comprises: the size of the size of the modulation system of DL-SCH data block, DL-SCH data block, DL-SCH data block physical resource, the activationary time of DL-SCH data block, the frequency location of DL-SCH data block physical resource, the coded system of DL-SCH data block.

Step 203: the base station will further be mapped in the BCH data block according to the demodulation physics signaling that scheduling obtains.

Step 204: the base station sends the BCH data block of the demodulation physics signaling of having carried BCCH channel system message and DL-SCH.

Step 205: the base station sends the DL-SCH data block of bearing system message according to determined dispatching method in the step 202.

Because system message is periodically to send, so the described flow process of Fig. 2 also is that base station side is periodically carried out.

Accordingly, the process that UE obtains the system message that the BCCH channel carried may further comprise the steps as described in Figure 3:

Step 301:UE obtains the BCH data block of bearing system message, and reads the BCH data block of receiving according to set form, obtains system message of carrying in the BCH data block and the demodulation physics signaling that is used for demodulation DL-SCH data block.

Because the BCH data block of bearing system message is periodically to send, so UE only needs to arrive in the BCH data block cycle and read the BCH data block and get final product.When whenever receiving the BCH data block, UE all carries out flow process as shown in Figure 3.Here, the set form of BCH is consulted to determine by base station and UE in advance.

Optionally, UE is obtaining can also judge further whether the BCH data block is correct after the BCH data block, if correct, then execution in step 302; Otherwise, return step 301.The judgement here can realize according to the fault tolerant mechanism by physical layer.

Step 302:UE can also further obtain the logical layer schedule information of carrying in the BCH data block, and judge whether to exist the BCCH channel system message maps of self needs in the DL-SCH channel according to the logical layer schedule information of BCH data block carrying, if then execution in step 303; Otherwise, execution in step 304.

The logical layer schedule information is used to indicate the The Nomenclature Composition and Structure of Complexes of BCCH channel system message.BCCH channel system message produces at radio resource controller (Radio Resource Controller) RRC place, comprises a variety of contents, and these contents attribute each other has nothing in common with each other.Therefore, the logical layer schedule information just is equivalent to the index of system message, and UE can obtain the composition and the attribute of system message according to the logical layer schedule information, and the system message of having carried what type in which data block.Determining of logical layer schedule information is by the RRC decision, is the information that has existed in the prior art.

Because the kind of system message is a lot, but be not that every type systematic message all is the current required system message of UE, therefore UE can be before reading the DL-SCH data block according to demodulation physics signaling, further judge whether current DL-SCH data block has carried self needed system message, under non-existent situation, then can finish this time to read the process of DL-SCH data block.

Therefore, step 302 is an optional step.

Step 303:UE reads the DL-SCH data block according to the demodulation physics signaling that obtains in the step 301, obtains the BCCH channel system message of being carried in the DL-SCH data block.Finish current handling process.

Step 304: finish current handling process.

As described in step 302, demodulation physics signaling mainly comprises: the size of the size of the modulation system of DL-SCH data block, DL-SCH data block, DL-SCH data block physical resource, the activationary time of DL-SCH data block, the frequency location of DL-SCH data block physical resource and the coded system of DL-SCH data block.Now the method to set up to each demodulation physics signaling describes in detail, and is specific as follows:

(1), the setting of DL-SCH data block modulation system

The modulation system of DL-SCH data block can adopt fixing modulation system, also can adopt semi-static modulation system.

Because DL-SCH channel institute data carried by data is inner broadcast transmission in whole sub-district, and be that a plurality of UE receive, therefore the DL-SCH channel that carries BCCH channel system message does not need the same with the DL-SCH channel that carries dedicated service, adopts adaptive modulation system.And can adopt fixing or semi-static modulation system.

Fixing modulation system is exactly predefined modulation system, adopts this mode just need not carry corresponding physics signaling in the BCH data block.Only need to consult to determine that by base station and UE UE gets final product according to fixing modulation system in advance.

Semi-static modulation system comprises two kinds of situations: be the modulation system of unit configuration with the sub-district and adopt different modulation systems constantly with different in the sub-district.

With the sub-district is that the modulation system that unit disposes is exactly: different modulation systems is adopted in different sub-districts, but different modulation systems are constantly fixed in the sub-district, and the modulation system that can adopt configuration platform parameter that different districts is set here realizes with the sub-district being the modulation system of unit configuration.When adopting configuration platform parameter that the modulation system of different districts is set, only change in configuration platform parameter, just can change with the modulation system that disposes the platform corresponding district.

Different in the sub-district to adopt different modulation systems constantly be exactly that modulation system can change according to various situations, but change very slowly, and this variation can be dispatched according to MAC and be carried out.

Under semi-static modulation system, can determine to represent modulation system according to the quantity of employing modulation system with the several bit physics signalings in the BCH channel.For example, can adopt a bit to represent two kinds of modulation systems, as QPSK and 16QAM; Perhaps adopt two bits to represent four kinds of modulation systems.After UE reads the BCH data block and represents the bit of modulation system accordingly, just can obtain the modulation system of this DL-SCH data block, so that the BCCH channel system message of carrying in the demodulation DL-SCH data block.

(2), the setting of DL-SCH data block size

The size of the DL-SCH data block in the demodulation physics signaling must be determined according to this size of carrying data volume.

Because the DL-SCH channel is a shared channel, and BCCH system information size also changes, therefore the size of DL-SCH data block changes, so the demodulation physics signaling of carrying in the BCH data block must be told UE corresponding D L-SCH data block size, UE could carry out correct demodulation to the DL-SCH data block.

In order to reduce in the BCH data block number of indication DL-SCH data block signaling bit as far as possible, can set in advance DL-SCH data block length kind, as 64 kinds, like this, the binary number of representing with 6 bits just can be represented the length of DL-SCH data block.When not satisfying set DL-SCH data block length, can in the DL-SCH data block, add invalid bit, make it length and satisfy the length requirement that sets in advance.

(3), the setting of DL-SCH data block physical resource size

The size of DL-SCH data block physical resource can be determined according to bandwidth and time.

In LTE, the modulation system of descending employing OFDM, physical resource comprises bidimensional and is respectively like this: bandwidth and time.Be illustrated in figure 4 as LTE physical resource schematic diagram.

Total be exactly the size of the product physical resource of physical resource time one dimension and bandwidth one dimension.Equally, because the BCCH channel is to send to whole sub-district, and sends to a plurality of UE, so need not adopt too many adaptive technique substantially.The total size of physical resource and the size of DL-SCH channel data piece can be mapped one by one, not need unnecessary data bit to represent physical resource size always like this.Have adaptivity if desired a little, can increase some bits: as increase a bit, the corresponding two kinds of physical resource size of different DL-SCH channel data piece block lengths.

In being provided with of DL-SCH data block physical resource size, except total size that physical resource will be set, length of field and frequency domain length in the time of also will being provided with.About the time length of field and frequency domain length, then can be provided with according to the LTE system, the size of length of field and frequency domain length adapts to the needs of whole LTE system applies when making.

(4), the setting of DL-SCH data block activationary time

For can demodulation DL-SCH, except needs obtain the size of physical resource, also need to obtain the physical resource positional information.Wherein, the position comprises frequency and time bidimensional, mainly describes the time one dimension in this part.

Fig. 5 is BCH data block and DL-SCH data block time-domain position graph of a relation.The time one dimension of physical resource position also can be activationary time, i.e. how long time t among Fig. 5, expression UE read after the BCH data block, and UE then can listen to and read the DL-SCH data block.UE can sleep within t during this period of time, so that save the UE power consumption.The setting of activationary time t is because the needs of real network environment can have two kinds: fixing or change.

Fixing is exactly set in advance read the BCH data block after how long just can read the DL-SCH data block, UE a period of time t that can sleep after obtaining the BCH data block then begins to read the DL-SCH data block corresponding with the BCH data block after a set time t arrives.This fixing method that activationary time is set need not be provided with specific physics signaling bit and be used to refer in the BCH data block.

The method to set up that changes, be exactly since network after sending the BCH data block, to send the time of DL-SCH data block fixing, therefore need the base station to determine activationary time t according to the scheduling situation of self dynamically, and by BCH data block bearing activation time t.For example, can represent 4 kinds of different activationary times with 2 bits; Also can adopt the mode of enumerating, as 10ms, 20ms, 40ms, 70ms; Can also utilize System Frame Number variety of ways such as (SFN, System Frame Number) to represent, satisfy certain rules etc. as SFN.

(5), the setting of DL-SCH data block physical resource frequency location

The position of physical resource also has frequency location except the time.Equally, fixing or semi-static mode also can be adopted in the position of frequency one dimension, reduce physics signal resource expense as far as possible.Do not need the physics signaling if adopt just to fix, the position is pre-defined.The very little bit of semi-static just employing is represented frequency location.

(6), the setting of DL-SCH data block coding coding mode

In LTE, the coded system of employing may have several, as convolution code, Turbo code, LDPC etc.Equally,, do not need too many self adaptation, just keep semi-static characteristic because the semi-static characteristic of BCCH channel can adopt relatively-stationary coded system.This implementation procedure can be similar to the modulation system of front.

Under the situation that adopts fixing coded system, in the BCH data block, then do not need to indicate the bit of DL-SCH data block coding coding mode.If adopt semi-staticly, can represent coded system with 1 or two bits, the mode of variation also has two kinds, can be that unit is configured with the sub-district, also can be in a sub-district differently constantly adopt different coded systems.If with the sub-district is that unit is configured, can be configured by configuration platform parameter; If different in sub-district are adopted different coded systems constantly, concrete coded system is then by the scheduling decision.

UE only need obtain the modulation system of aforesaid DL-SCH data block, the size of DL-SCH data block, the size of DL-SCH data block physical resource, the activationary time of DL-SCH data block, the frequency location of DL-SCH data block physical resource and the coded system of DL-SCH data block, promptly can be according to the system message of carrying among the required DL-SCH of these demodulation physics signal demodulations acquisitions self.

In the process that above-mentioned demodulation physics signaling is elaborated, as can be seen, these demodulation physics signalings or can set in advance do not need UE to obtain from the BCH data block; Then in the BCH data block, adopt the bit of fixed qty to be described.Therefore, in the BCH data block, increase the demodulation physics signaling of having carried the DL-SCH data block, do not destroy the set form of BCH data block.

Simultaneously, owing to comprised the information that obtains the DL-SCH data block corresponding in the demodulation physics signaling with the BCH data block, therefore in the step 303, UE only needs to read the DL-SCH data block according to the demodulation physics signaling that obtains, and just can obtain the BCCH channel system message of being carried in the DL-SCH data block.

Step 303 is described, and the detailed process that reads the BCCH channel system message of shining upon in the DL-SCH data block according to demodulation physics signaling is described in detail as follows as shown in Figure 6:

Step 601:UE enters sleep state according to the activationary time in the demodulation physics signaling, and time span is the activationary time that obtains from the BCH data block.

Step 602: when activationary time arrival UE is awake, execution in step 603.

The temporal information of carrying in the size of step 603:UE according to DL-SCH data block physical resource obtains shining upon the temporal information of DL-SCH data block; The bandwidth of carrying in the size according to the frequency location of the DL-SCH data block physical resource of BCH carrying and DL-SCH data block physical resource obtains shining upon the frequency information of DL-SCH data block.

Step 604:UE utilizes the modulation system of DL-SCH data block, and OFDM (OFDM) signal of the descending modulation determined according to the temporal information that obtains and frequency information is carried out demodulation, obtains the demodulation result of DL-SCH data block.

Step 605:UE is according to the size of the DL-SCH data block that obtains from the BCH data block and the coded system of DL-SCH data block, the demodulation result that step 604 obtains is deciphered, obtain the DL-SCH data block contents that wireless channel transmits, the BCCH channel system information of promptly carrying in the DL-SCH data block.

Embodiment two

In the present embodiment, do not adopt the method for carrying DL-SCH data block demodulation physics signaling in the BCH data block; The physical layer signaling channel that exists is carried DL-SCH data block demodulation physics signaling but utilize in the LTE system, for example share down control channel SDCCH, perhaps other can carry the channel of physical layer signaling.The physical layer signaling channel is that the physical layer channel shared data channel (SDCH) of DL-SCH provides control information, and this channel is multicast.The function finished of the physical layer signaling channel of Miao Shuing is similar to the High-Speed Shared Control Channel (HS-SCCH) among the HSDPA herein.

In this case, UE must monitor and read the physical layer signaling channel earlier and obtain the wherein DL-SCH data block demodulation physics signaling of carrying, reads the DL-SCH data block according to demodulation physics signaling then.

The process of base station transmission system message as shown in Figure 7, detailed process is as follows:

Step 701: the base station maps to BCCH channel system message respectively on BCH channel and two transmission channels of DL-SCH channel.

Step 702: the base station sends the BCH data block of carrying BCCH channel system message according to the transformat that pre-sets.

Step 703: the base station obtains the demodulation physics signaling of the DL-SCH data block of bearing system message by the scheduling of MAC layer.

Here, the demodulation physics signaling that the base station is determined has determined that equally the base station sends the process of transmitting of the DL-SCH data block of having carried BCCH channel system message.

Step 704: the base station on the physical layer signaling channel, sends the demodulation physics signaling bear of DL-SCH data block to have carried demodulation physics signaling physical layer signaling data block.

Step 705: the method that the base station is determined according to the scheduling of MAC layer sends the DL-SCH data block of bearing system message.

Corresponding therewith, the process that UE obtains BCCH channel system message may further comprise the steps as shown in Figure 8.

Step 801:UE obtains the BCH data block of bearing system message, and reads according to set form and to obtain the system message of carrying in the BCH data block.

Optionally, UE judges further when obtaining the BCH data block whether the data block that obtains is correct, if correct, then execution in step 802; Otherwise, finish current handling process.The judgement here can realize according to the fault tolerant mechanism by physical layer.

Because the BCH data block of bearing system message is periodically to send, so UE only needs to arrive in the BCH data block cycle and read the BCH data block and get final product.When whenever receiving the BCH data block, UE all carries out flow process as shown in Figure 8.Here, the set form of BCH is consulted to determine by base station and UE in advance.

Step 802:UE further obtains the logical layer schedule information of BCCH system information, and the BCCH channel system message maps that judges whether to exist self needs is to the DL-SCH channel, if then execution in step 803; Otherwise, finish current handling process.

This step 802 is an optional step, and the reason in the step 302 of concrete and embodiment one is identical, at this at detailed description.

Step 803:UE monitors the physical layer signaling channel, to obtain the physical layer signaling data block of BCCH system message.

Monitor to be exactly time and sub-band that institute might existence reason layer signaling data block are received, to utilize UE ID and physical-layer techniques, see whether there is the physical layer signaling data block of carrying the BCCH system message.

In step 803, UE also finds the physical layer signaling channel of needs when listening to next BCH, and then explanation is because the demodulation mistake causes not receiving the physical layer signaling data block in the time that should receive the physical layer signaling data block.UE finishes to monitor, and finishes this time to read process, continues to read next BCH, and step is exactly 801.

Step 804: when UE listens to the physical layer signaling data block of the demodulation physics signaling of carrying the DL-SCH channel, then obtain the demodulation physics signaling of wherein carrying the DL-SCH channel.

Step 805:UE reads the DL-SCH data block according to the demodulation physics signaling that obtains, and obtains the BCCH channel system message of being carried in the DL-SCH data block.Finish current handling process.

Step 806: finish current handling process.

Embodiment three

Under the situation of utilizing physical layer signaling channel bearing DL-SCH channel demodulation physics signaling, always there is the regular hour gap between the physical layer signaling data block of carrying DL-SCH channel demodulation physics signaling and the BCH data block.UE in order to obtain the DL-SCH channel demodulation physics signaling that needs, just must monitor the physical layer signaling channel, the UE under this process very power consumption, the especially idle pulley always after reading the BCH data block.

In order to address this problem, present embodiment adds activationary time in the BCH data block, is used to refer to UE after having read the BCH channel, reads the time of the physical layer signaling channel data piece that has carried DL-SCH channel demodulation physics signaling.After UE has read the BCH data block, then can enter sleep pattern, remove the snoop procedure of UE to the physical layer signaling channel, save UE power consumption.Be illustrated in figure 9 as the time domain relation between BCH data block, physical layer signaling channel data piece and the DL-SCH data block.

The t of Fig. 9 represents activationary time, and just UE t time after reading the BCH data block is activated, and begins to read the physical layer signaling channel.This activationary time length is by the carrying of BCH data block, and UE just can obtain activationary time after reading the BCH data block.

Being provided with of activationary time can have two kinds, and the concrete method that is provided with and which kind of when adopts be provided with is identical with activationary time described in the embodiment one is not described in detail in this.

Carrying physical layer signaling data block activationary time t in the BCH channel, the flow process of then transmitting BCCH channel system message can change to some extent, and detailed process may further comprise the steps as shown in figure 10:

Step 1001: the base station is mapped in BCCH channel system message respectively on BCH channel and two transmission channels of DL-SCH channel.

Step 1002: the activationary time t of physical layer signaling data block is determined in the base station by scheduling.

Step 1003: the base station further maps to activationary time t in the BCH data block, sends the BCH data block.

Step 1004: DL-SCH channel demodulation physics signaling is determined by scheduling in the base station, and DL-SCH channel demodulation signaling bear on the physical layer signaling channel, and is sent the physical layer signaling data block of carrying DL-SCH channel demodulation physics signaling.

Step 1005: the method that the base station is determined according to the scheduling of MAC layer sends the DL-SCH data block of carrying BCCH channel system message.

Corresponding therewith, the process that UE obtains BCCH channel system message may further comprise the steps as described in Figure 11:

Step 1101:UE obtains the BCH data block of bearing system message in the position that pre-sets, and reads the BCH data block in the fixed position, obtains the BCCH channel system message, the physical layer signaling channel activationary time t that carry in the BCH channel.

Optionally, UE can also judge further whether the BCH data block that obtains is correct after obtaining the BCH data block, if correct, then execution in step 1102; Otherwise, return step 1101.The judgement here can realize according to the fault tolerant mechanism by physical layer.

Step 1102:UE further obtains the logical layer schedule information of BCCH system information, judges whether to exist the BCCH channel system message part of self needs to be mapped in the DL-SCH channel, if then execution in step 1103; Otherwise, finish current handling process.

Step 1102 is an optional step, concrete reason identical with described in the embodiment one.

Step 1103:UE enters sleep state according to the activationary time t of BCH channel bearing, and the time is t.

Step 1104: behind the time t, UE monitors and reads the physical layer signaling data block of carrying demodulation physics signaling, obtains the demodulation physics signaling of DL-SCH channel.

Because activationary time has been determined the time that the physical layer signaling data block occurs the BCH data block after, the therefore monitoring of indication here: only at might existence manage layer signaling data block sub-band receive.

Step 1105:UE reads the DL-SCH data block according to the demodulation physics signaling that obtains, and obtains the BCCH channel system message of being carried in the DL-SCH data block.

In the present embodiment, except can in the BCH data block, carrying the physical layer signaling channel activationary time, can also be in BCH data block carrying physical layer signaling channel sub-band information.

In the physical layer signaling channel, have a plurality of sub-bands, and the demodulation physics signaling of DL-SCH channel has only taken a part of sub-band in the physical layer signaling channel.Therefore, UE will might monitor by an existence reason layer signaling channel sub-band certain institute constantly, check the physical layer signaling channel that whether has self needs, and this process is monitored the same very power consumption of physical layer signaling channel with the moment.Like this, if carried the sub-band information at physical layer signaling channel place in the BCH data block, UE only need carry out demodulation to the sub-band of correspondence, then can save the UE power consumption.

The base station has two kinds by the mode of the corresponding physical layer signaling channel of BCH data block carrier band information notice UE sub-band information, and a kind of is group of subbands, is exactly single sub-band in addition.If there are 10 sub-bands that contain the physical layer signaling channel, if system does not tell UE any information in advance, UE will monitor whole ten sub-frequency bands; If UE is told in the base station, the physical layer signaling channel that UE needs is on group of subbands 1, if group of subbands 1 only comprises 2,3,4 three sub-frequency bands, then UE only need monitor the group of subbands of being determined by three sub-frequency bands.In addition, if the information of the single sub-band of UE is told in the base station, as the 3rd sub-frequency bands, UE does not just need to monitor, and directly physical layer signaling channel on the definite sub-band is carried out demodulation.

The coactivation time is the same, to being provided with to be divided into and having two kinds of the sub-band information of physical layer signaling channel, comprises fixing or changes.Fixing is exactly makes an appointment the physical layer signaling channel of carrying DL-SCH demodulation physics signaling at which group of subbands or which sub-band, and do not need BCH to carry any information this moment; If sub-band information is fixing, then need be in the BCH data block carrier band information, the mode of specific implementation is identical with activationary time, searches the physical layer signaling channel of self needs according to the group of subbands of making an appointment or sub-band.

The handling process of carrier band information is roughly the same with the handling process of bearing activation time in the BCH data block in the BCH data block.Difference is, after UE obtains sub-band information, then need at the sub-band that sub-band information is determined, monitor the physical layer signaling channel on the described time, obtains the physical layer signaling data block that self needs.

Certainly, activationary time and sub-band information can be used simultaneously, also can separately use according to actual conditions.

Also can mainly comprise in the demodulation physics signaling described in embodiment two and the embodiment three: the size of the size of the modulation system of DL-SCH data block, DL-SCH data block, DL-SCH data block physical resource, the activationary time of DL-SCH data block, the frequency location of DL-SCH data block physical resource and the coded system of DL-SCH data block.

The structure drawing of device corresponding with the inventive method comprises transmitting element 1201 and receiving element 1202 as shown in figure 12 at least; Wherein,

Transmitting element 1201 is used for system message is mapped to BCH and DL-SCH; And obtain the demodulation physics signaling of DL-SCH channel, send the BCH data block and the DL-SCH data block of demodulation physics signaling and bearing system message;

Receiving element 1202 is used to receive the demodulation physics signaling of described transmitting element 1201 transmissions and the BCH data block and the DL-SCH data block of bearing system message; The system message of carrying in the acquisition BCH data block; Obtain demodulation physics signaling, obtain bearing system message in the DL-SCH data block according to demodulation physics signaling.

Wherein, transmitting element 1201 is positioned at base station side; Described receiving element 1202 is arranged in UE.

The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.

Claims

1, a kind of method of transfer system message is characterized in that, may further comprise the steps:

2, method according to claim 1 is characterized in that,

Among the step B, described transmission demodulation physics signaling is: demodulation physics signaling bear in described BCH data block, is sent the described BCH data block that carries demodulation physics signaling;

3, method according to claim 2, it is characterized in that described demodulation physics signaling comprises: the size of the size of the modulation system of DL-SCH data block, DL-SCH data block, DL-SCH data block physical resource, the activationary time of DL-SCH data block, the frequency location of DL-SCH data block physical resource and the coded system of DL-SCH data block.

4, method according to claim 3 is characterized in that, among the step C, described demodulation physics signaling according to acquisition is obtained the system message of being carried in the DL-SCH data block and is:

5, method according to claim 1 is characterized in that,

Further comprise among the step B: with demodulation physics signaling bear to the physical layer signaling channel;

6, method according to claim 5 is characterized in that, among the step B, and the further bearing activation time in the BCH data block;

Among the step C, described acquisition demodulation physics signaling is:

7, method according to claim 6 is characterized in that, described activationary time is: the activationary time that activationary time that is set in advance by the base station or base station are determined according to scheduling.

8, method according to claim 5 is characterized in that, among the step B, and further carrier band information in the BCH data block;

Among the step C, described acquisition demodulation physics signaling is:

9, method according to claim 8 is characterized in that, described sub-band information is: single sub-band or the group of subbands of being made up of a plurality of sub-bands.

10, method according to claim 8 is characterized in that, described sub-band information is: the sub-band information that sub-band information that is set in advance by the base station or base station are determined according to scheduling.

11, a kind of device of transfer system message is characterized in that, comprises transmitting element and receiving element at least; Wherein,

12, device according to claim 11 is characterized in that, described transmitting element is positioned at the base station; Described receiving element is positioned at UE.