WO2007128223A1

WO2007128223A1 - A method and apparatus for sending/receiving system control information

Info

Publication number: WO2007128223A1
Application number: PCT/CN2007/001430
Authority: WO
Inventors: Zhihong Lu
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-04-30
Filing date: 2007-04-28
Publication date: 2007-11-15
Also published as: CN101115281A; CN101115281B

Abstract

A method for sending/receiving system control information, when system control information is changed, network side schedules channel resources for sending changed system control information to the user equipment (UE); the network side informs the UE to read the sent system control information by sending system control information changing indication. According to the sending mode, when the UE selects a new cell, or when the UE receives the information indicating the changes of system control information sent by the network side, the UE acquires the position where the system control information locates by the system broadcasting information or the information instructing the changes of system control information, and reads the information on that position to get the system control information. An apparatus for sending/receiving system control information. UEs in idle state or active state may effectively receive the changed system control information.

Description

System control message sending and receiving method and device

This application is filed on April 30, 2006, the Chinese Patent Office, Application No. 200610078684.2. The priority of the Chinese patent application entitled "System Control Message Transmission, Receiving Method and Apparatus", and the requirements of July 27, 2006 The priority of the Chinese Patent Application No. 200610099106.7, entitled "System Control Message Transmission, Receiving Method and Apparatus", is hereby incorporated by reference.

Technical field

The present invention relates to the field of mobile communication technologies, and in particular, to a system control message sending and receiving method and apparatus.

Background technique

In a mobile communication system, the UE (User Equipment) has two basic modes of operation: idle mode and connected mode. The UE stays in the idle mode after power-on, and identifies the non-access stratum such as IMSI (International Mobile Subscriber Identity), TMSI (Temporary User Identity) or P-TMSI (Packet Temporary Mobile Subscriber Identity). And other signs to distinguish. The UTRAN (Terrestrial Radio Access Network) does not store the information of the idle mode UE, and can only page all UEs in one cell or all UEs in the same paging moment. When the UE completes the R C (Radio Resource Control) connection establishment, the UE transits from the idle mode to the connected mode. In the RRC connected mode, the UE has four states, which reflect the level of UE connection and which transport channel the UE can use. When the RRC connection is released, the UE transitions from the connected mode to the idle mode.

In the RRC connected mode, the state of the UE is divided into four types: CELL_DCH state, CELL_FACH state, CELL_PCH state, URA-PCH state. These states define the physical channel type, measurement and mobility management tasks used by the UE, and the actions when a state transition occurs. In the CELL-DCH state, the system allocates a dedicated channel to the UE for large-traffic data transmission. When the activity of the UE decreases and the amount of transmitted data decreases significantly, the system can change the state of the UE to CELL-FACH. status. In the CELL-FACH state, the UE can only communicate with the system using the common channel, the uplink uses the RACH (random access channel), and the downlink uses the FACH (forward access channel), which is suitable for a small amount of data transmission. If the UE's activity is reduced again, the system can change the state of the UE to CELL_PCH. In this case, the UE can only listen to the paging channel, and cannot perform any data transmission. The least active state is the URA-PCH state, in which the UE can only listen to the paging channel. URA_PCH The difference between the state and the CELL_PCH state is that when the UE is in the CELLJPCH state, if the current serving cell changes, it needs to report to the UTRAN once, and in the URA-PCH state, it only needs to be the URA (UTRAN registration area). When the area changes, it is necessary to report. The size of the operator's custom URA area usually contains several cells.

In the existing communication system, the system control message is sent on the BCH (Broadcast Channel) by means of MIB+SIB (main message block + system message block), and the scheduling information of the SIB is included in the MIB or the scheduling block, and the MIB includes both The tag value of the SIB. In order to enable the UEs with different capabilities and different environments in the entire cell to receive the system control messages sent by the BCH, the BCH usually adopts a fixed lower rate and a fixed transmission format, which makes the transmission efficiency of the BCH low, and The higher transmit power of the BCH affects the downlink capacity of the system to some extent. At the same time, because the rate of the BCH is low, the UE reads the BCH for a long time and increases the power consumption of the UE. On the other hand, if the UE needs to perform cross-frequency or cross-system measurement in the GAP (gap), it needs to read The system control message of other cells is taken, which requires the UE to shorten the reading time of the system control message.

Idle (idle state), CELL_FACH state, CELL_PCH state, URA_PCH state, when entering a new cell, read the MIB, obtain the SIB tag value, if the SIB tag value and the UE in the MIB If the tag value in the stored VALUE_TAG is different, the tag is stored and the SIB is read. For UEs in FDD (Frequency Division Duplex) and CELL-DCH states, only certain UEs that can simultaneously receive S-CCPCH (Common Control Physical Channel) and DCH (Dedicated Channel) can receive changed system control messages. The changed system control message is a system control message change indication sent by the FACH (Forward Access Channel), and the UE reads the system control message from the BCH after receiving the indication.

Currently in 3GPP (3rd Generation Partnership Project), all vendors are actively researching 3G Long Term Evolution (LTE) systems. The purpose of LTE is to provide a way to reduce latency, improve user data rates, and improve System capacity and low cost network coverage. Only the PS domain service is used, and the bearer network is an IP bearer. In the LTE system, the UE has only two states, Idle and Active, and there is no FACH channel. Therefore, according to the prior art, the UE will not be able to normally receive the changed system control message in the Active state.

Summary of the invention

An embodiment of the present invention provides a system control message sending method, so that when a system control message changes, all UEs in the system can be notified in time. Another aspect of the embodiments of the present invention provides a method for receiving a system control message, so that the UE can correctly receive the system control message regardless of whether it is in an idle state or an active state, so as to ensure normal operation of the UE.

A further aspect of the embodiments of the present invention provides a system control message sending apparatus, which can notify all UEs in the system in time after the system changes, thereby improving the working efficiency of the system.

A further aspect of the embodiments of the present invention provides a system control message receiving apparatus, so that the UE can receive the changed system control message in a timely and accurate manner under any state, and ensure that the UE communicates with the system.

To this end, the embodiments of the present invention provide the following technical solutions:

A system control message sending method includes the following steps:

After the system control message changes, the network side scheduling channel resource sends the changed system control message to the user equipment UE;

The network side notifies the UE to read the system control message it sends by sending a system control message change indication.

A system control message receiving method includes the following steps:

When the user equipment UE selects a new cell or the UE receives the system control message change indication information sent by the network side, the location where the system control message is located is obtained according to the system broadcast message or the system control message change indication information;

The UE reads the location where the system control message is located, and acquires a system control message.

A system control message sending device includes:

a system control message extraction module, configured to acquire the changed system control message;

a resource scheduling module, configured to allocate, by the network side, a channel resource required for sending a message to the user equipment UE;

a change indication information generating module, configured to be connected to the system control message extraction module, configured to generate system control message change indication information after the system control message changes;

The message sending module is respectively connected to the system control message extracting module, the change indication information generating module, and the resource scheduling module, and configured to: after the system control message changes, the changed system control message and the generated system control message The change indication information is sent to the UE by the resource scheduling module for the channel resource allocated by the resource scheduling module. A system control message receiving device is disposed in the user equipment UE, and includes:

a change indication information obtaining module, configured to acquire system control message change indication information according to information received by the user equipment UE;

The system control message location obtaining module is connected to the change indication information acquiring module, and configured to acquire a location where the system control message is located according to the system control message change indication information;

The system control message extracting block is connected to the system control message location obtaining module, and is configured to extract a system control message according to the location where the system control message is located.

According to the technical solution provided by the foregoing embodiments of the present invention, after the system control message is changed, the embodiment of the present invention sends the changed system control message to the user equipment UE in the idle state or the activated state by using the network side scheduling channel resource. And sending the system control message change indication, notifying the UE in the idle state or the active state to read the system control message sent by the UE, and ensuring that the changed system control message is notified to the UEs in all states in time. DRAWINGS

1 is a flowchart of an implementation of a system control message sending method according to an embodiment of the present invention; FIG. 2 is a flowchart of an implementation of a system control message receiving method according to an embodiment of the present invention; FIG. 4 is a schematic block diagram of a system control message transmitting apparatus according to an embodiment of the present invention; and FIG. 5 is a schematic block diagram of a system control message receiving apparatus according to an embodiment of the present invention.

detailed description

After the system control message changes, the network side schedules the channel resource, sends the changed system control message to the user equipment UE (idle state or active state), and sends the system control message change indication to notify the UE to read the transmission. The system control message notifies the changed system control message to all states of the UE in time. Based on the transmission mode of the network side, when the UE selects a new cell, or the UE (idle state or active state) receives the system control message change indication information sent by the network side, the system broadcast message or the system control may be performed. The message change indication information acquires a location where the system control message is located, so that the UE can obtain the changed system control message according to the location information. In order to make those skilled in the art better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

Referring to FIG. 1, FIG. 1 shows an implementation process of a system control message sending method according to an embodiment of the present invention, which includes the following steps:

Step 101: After the system control message changes, the network side scheduling channel resource sends the changed system control message to the UE.

Those skilled in the art know that in an LTE (Long Term Evolution) system, there are only two states of the UE: an idle state and an active state. In the embodiment of the present invention, the network side scheduling channel resource sends the changed system control message to the idle state or the activated state UE after the system control message changes, whether the UE is in the idle state or the UE in the activated state. . Of course, the specific channel resources, transmission methods, and transmission contents used are different. The process of transmitting system control messages in different situations will be described in detail later.

Step 102: The network side notifies the UE to read the system control message sent by the system by sending a system control message change indication.

As mentioned above, after the system control message changes, the network side needs to schedule the channel resource to send the changed system control message to the UE in the idle state or the activated state. This will be explained in detail below.

First, for the UE in the idle state, the network side needs to send a system control message to the UE through the broadcast channel. In order to improve the transmission efficiency of the broadcast channel, the embodiment of the present invention classifies the system control messages in advance, and divides the system control messages into two categories: a first level system control message and a second level system control message. The specific division can be used but not limited to the following two ways:

(1) The system control message is divided into: a system level system control message, that is, a second level system control message, and a cell level system control message, that is, a first level system control message. The system level system control message is shared by all the cells in the system, for example, the system message blocks SIB1, SIB2, SIB13, etc.; the cell level system control message is valid only for the local cell, for example, the system message block SIB3, SIB4 Etc., these messages can be different in different cells. Of course, depending on the application requirements, there may be different classification methods, for example, dividing some system level system control messages into cell level for transmission.

(2) Divide the system control message into two parts: The first part is the first level system control message. The system control message including cell selection and reselection related system control messages and cell access requirements; the second part, the second level system control message includes: all system control messages except the first level system control message. Or the first level system control message includes scheduling information of physical layer parameters (eg, cell bandwidth, etc.) and second level control information; the second level system control message includes system control other than the first level system control message Information such as: neighbor information, timer information, channel pre-configuration information, etc.

In this way, the first level system control message and the second level system control message are respectively sent on the broadcast channel and other channels than the other broadcast channel, such as a multicast channel, a downlink shared channel, a dedicated channel, etc., to reduce The load of the small broadcast channel, the transmission power of the P low broadcast channel, increases the downlink capacity of the system.

If the second level of system control messages are sent on other channels than the broadcast channel, then the channel needs to be notified to the UE, i.e., the UE is made aware of which channel from which the system control message needs to be read. To this end, the embodiment of the present invention adds a switch indication parameter to the scheduling information included in the main message block of the system broadcast message, and the parameter is "on", indicating that the second level system control message is other than the broadcast channel. The channel is sent; the parameter is "off," indicating that the second level of the system control message is also sent through the broadcast channel, so that when the UE receives the system control message, the second level system control message can be learned according to the parameter. The way to send, get the required system control message.

After the network side sends the system control message to the UE, it also needs to notify the UE that the system control message has changed. For the idle state UE, the network side sends a paging message to the UE through the paging channel, and the paging message includes system control. Message change indication information.

Secondly, for the UE in the active state, the UE and the network side have a downlink shared channel for message transmission in this state. Therefore, the embodiment of the present invention sends the changed system control message to the UE through the downlink shared control channel. And inform the UE to read the message. At this time, it is not necessary to classify the system control message, but all the changed system control messages are sent to the UE through the downlink shared control channel. For example, the following implementations are possible:

(1) The network side schedules resources that are valid for all UEs on the downlink shared channel, and sends the changed system control message to all UEs in the active state through the resource; and changes the system control message change indication information through the control channel of the downlink shared channel. All UEs sent to the active state.

(2) The network side schedules resources valid for all UEs on the downlink shared channel, and passes the resources. Transmitting the changed system control message to all UEs in the active state; then transmitting the system control message change indication information to the single UE in the active state through the control channel of the downlink shared channel.

(3) The network side schedules resources valid for a single UE on the downlink shared channel, and sends the changed system control message to the UE in the activated state by using the resource; and then changes the system control message by using the control channel of the downlink shared channel. Information is sent to the UE.

(4) The network side reserves a system control message sending resource on the downlink shared channel, and sends the changed system control message to all UEs in the active state or a single UE or a part of the UE through the reserved resource; The control channel transmits system control message change indication information to all UEs or to a single UE or a partial UE.

The network side sends the location information of the changed system control message to the UE, while transmitting the system control message change indication information, for the UE in the idle state or the UE in the active state.

Corresponding to the sending manner of the foregoing system control message, the embodiment of the present invention further discloses a system control message receiving method, and FIG. 2 shows the implementation process thereof, including the following steps:

Step 201: When the user equipment UE selects a new cell, or when the UE receives the system control message change indication information sent by the network side, the location where the system control message is located is obtained according to the system broadcast message or the system control message change indication information.

In the foregoing description of the system control message sending method, the network side needs to schedule the channel resource to the idle state or activate after the system control message changes, for the UE in the idle state or the UE in the active state. The UE in the state sends the changed system control message, and notifies the UE to read the system control message by sending a system control message change indication. Therefore, for the UE, it is first necessary to obtain the location where the system control message is obtained according to the system control message change indication information. Since the UE selects a new cell, it needs to read the system information of the new cell. Therefore, the UE in this state only needs to read the system broadcast message, and learns the location of the system control message according to the system broadcast message.

Step 202: The UE reads the location where the system control message is located, and acquires a system control message.

After knowing the location information of the system control message, the UE can extract the content of the system control message from the location where the system control message is located on the corresponding channel.

The process of acquiring system control messages by UEs in different states is described in detail below. 1. The process of the UE reading the system control message in the idle state:

When the UE is in an idle state, it receives a system paging message on the paging channel, and includes a tag value information of the MIB (main message block) in the paging message, and includes a tag value in the MIB. After receiving the paging message, the UE needs to determine whether the MIB has a changed system control message according to the message, and then determines, according to the label value included in the MIB, which system control messages have changed, that is, the label value is The system controls the message change indication information.

The UE reads the tag value in the MIB, compares whether the tag value and the tag stored in the variable VALUE_TAG are the same. If they are the same, it indicates that the system control message has not changed, and no need to read the system broadcast message at this time; if different or UE There is no such IE (entity) storage, then the tag value in the MIB needs to be stored into the variable VALUE_TAG, and then the system broadcast message is read, according to the scheduling information stored in the MIB and the scheduling block in the system broadcast message, and according to The scheduling information determines where the system control message is located. Then, the corresponding system control message is read to the corresponding location.

When a UE (which may be an idle state UE or an active state UE) selects a new cell, it is not necessary to wait for the system paging message to be received before reading the system broadcast message, but directly to the broadcast channel. The system broadcast message is read, and the information in the MIB of the new cell is obtained. If the label value of the SIB (system message block) in the MIB is different from the stored label value, each system is obtained according to the scheduling information in the MIB and the scheduling block. Control where the message is located. Then, read the corresponding system control message to the corresponding location.

FIG. 3 shows a process of acquiring a system control message when a UE selects a new cell in the embodiment of the present invention:

Step 301: The UE captures a BCH (Broadcast Channel) and receives the MIB of the new cell on the BCH. Step 302: Obtain a label value in the MIB.

Step 303: Compare the tag value in the MIB with the tag value stored in the variable VALUE_TAG by the UE, and determine whether the two values are the same. If they are the same, proceed to step 304; if different or there is no such IE storage in the UE, proceed to step 305.

Step 304: The UE uses the stored system control message, that is, the system control message is not changed, and the UE can still use the various system control messages originally stored.

Step 305: The UE stores the tag value to the variable VALUE_TAG.

Step 306: Read and store the scheduling information in the MIB and the scheduling block. Step 307: Determine whether the switch indication parameter in the MIB scheduling information is "on". If yes, go to step 308; otherwise, go to step 309.

As mentioned above, when the network side sends a system control message to the idle state UE, the network control message can be divided into: a second level system control message and a first level system control message, and the two types of messages are Transmit on different channels to reduce the burden on the broadcast channel. To this end, a switch indication parameter may be added to the scheduling information contained in the main message block of the system broadcast message, and a different value of the parameter may be used to indicate whether a system control message is sent on another channel. For example, when the switch indicates that the parameter is "on", it indicates that the second level system control message is sent through other channels than the broadcast channel; when the switch indicates that the parameter is "off", it indicates that the system control message only passes Broadcast channel transmission. Of course, it can be reversed. Therefore, when reading the scheduling information in the MIB of the broadcast message, the UE needs to determine the value of the switch indication parameter to determine whether it is necessary to read the system control message on other channels. Which channel is used by the network side to send system-level system control messages is also required to notify the UE through the scheduling information in the MIB.

Step 308: The UE acquires a channel where the system control message is located according to the scheduling information in the MIB.

Step 309: Obtain a location of the system control message in the scheduling information.

Step 310: The location of the system control message in the scheduling information to the corresponding location on the corresponding channel reads the system control message.

For system message blocks that are not supported by the UE, the UE may skip the reading of the message block and do not need to monitor the change of the message block.

2. The process of the UE reading the system control message in the active state:

As mentioned above, in the present invention, for the UE in the active state, the network side sends the changed system control message to the UE through the downlink shared control channel, and notifies the UE to read the message. In a specific implementation, the network control sends the changed system control message to all UEs in the active state or a single UE or a part of the UE through the downlink shared channel. The system control message change indication information is sent to all UEs through the control channel of the downlink shared channel. Or a single UE or part of a UE.

Therefore, whether the system control message or the system control message change indication information sent by the network side is for all UEs or a single UE, for each UE in an active state, the control channel of the downlink shared channel needs to be read, and the system control message is acquired. The change indication information and the location of the system control message, and then read the downlink shared channel, and obtain according to the location of the obtained system control message System control message.

Referring to FIG. 4, FIG. 4 is a block diagram showing the principle of a system control message transmitting apparatus according to an embodiment of the present invention:

The device includes: a system control message extraction module S41, a change indication information generation module S42, a resource scheduling module S43, and a transmission module S44. among them,

The system control message extraction module S41 is configured to acquire the changed system control message; the resource scheduling module S43 is configured to allocate, to the network side, channel resources required for sending a message to the user equipment UE; the change indication information generating module S42 and the system control message extraction module S41 is connected to generate system control message change indication information after the system control message changes; the sending module S44 is respectively connected to the system control message extraction module S41, the change indication information generating module S42, and the resource scheduling module S43, and is used in the system. After the control message is changed, the changed system control message and the generated system control message change indication information are respectively sent to the UE by the resource scheduling module S43 for the allocated channel resource.

In order to reduce the load of the broadcast channel, a classification module S45 may be disposed between the system control message extraction module S41 and the resource scheduling module S43 for classifying system control messages, and dividing the system control message into: first level system control The message and the second level system control message enable the resource scheduling module S43 to allocate the required channel resources according to the classification.

For example, the classification module S45 may divide the system control message into a system level control message (i.e., a first level system control message) at the cell level and a system control message (i.e., a second level system control message) at the system level. The system level control message at the cell level is valid only for the local cell; the system level system control message is shared for different cells in the system.

For another example, the classification module S45 may divide the system control message into two parts, and a part (ie, the first level system control message) includes a system control message related to cell selection and reselection and a system control message required for cell access; another part ( That is, the second level system control message) includes: all system control messages except the first level system control message. Or the first level system control message includes physical layer parameters (eg, cell bandwidth, etc.) and scheduling information of the second level control information; the second level system control message includes system control other than the first level system control message Information such as: neighbor information, timer information, channel pre-configuration information, etc.

Of course, there are other ways to classify. In this way, the resource scheduling module S43 can allocate different channel resources for different types of system control messages according to the classification.

When the system control message is sent to the UE in the idle state, the resource scheduling module allocates other channel resources except the broadcast channel for the second level system control message, and allocates the broadcast channel resource for the first level system control message; When the UE transmits the system control message change indication information, the resource scheduling module S43 allocates a paging channel resource thereto. That is, when the UE is in the idle state, the second level system control message occupies other channel resources except the broadcast channel, and the first level system control message occupies the broadcast channel resource; the system control message change indication information passes the paging. The channel resources are sent to the UE.

When the system control message is sent to the UE in the active state, the resource scheduling module S43 allocates the downlink shared channel resource, that is, when the UE is in the active state, the system control message is sent to the UE through the downlink shared channel resource.

For a detailed procedure for sending a changed system control message to a UE in a different state, reference may be made to the foregoing description of the system control message sending method in the embodiment of the present invention, and details are not described herein again.

Referring to Figure 5, there is shown a block diagram of a system control message receiving apparatus in accordance with an embodiment of the present invention:

The device is located in the UE, and includes: a change indication information acquiring module S51, a system control message position obtaining module S52, and a system control message extracting module S53 connected in sequence.

The change indication information obtaining module S51 is configured to obtain the system control message change indication information according to the information received by the user equipment UE. The system control message location obtaining module S52 is configured to acquire the system control message according to the system control message change indication information. The system control message extraction module S53 is configured to extract a system control message at a location where the system control message is located.

When the UE is in an idle state, the change indication information acquiring module S51 reads the paging channel, acquires the system control message change indication information, and reads the broadcast channel according to the information, and acquires the location where the system control message is located; when the UE selects a new one, When the cell is in the cell, the change indication information acquiring module S51 directly reads the broadcast channel to obtain the location where the system control message is located; when the UE is in the active state, the change indication information acquiring module S51 reads the control channel of the downlink shared channel, and acquires the system control message. Where it is.

For a detailed process of the UE acquiring system control messages in different states, refer to the foregoing system for the present invention. The description of the control message receiving method will not be repeated here.

It can be seen that, according to the technical solution provided by the foregoing embodiment of the present invention, after the system control message is changed, the embodiment of the present invention sends the changed system to the user equipment UE in the idle state or the activated state by scheduling the channel resource on the network side. The control message is sent to the UE in the idle state or the active state to read the system control message sent by the UE by sending the system control message change indication, so as to ensure that the changed system control message is notified to the UEs in all states in time.

Further, for the idle state UE, by classifying the system control message and transmitting separately through the broadcast channel and other channels, the burden of the broadcast channel is effectively reduced, and the transmission power of the broadcast channel is reduced, thereby increasing the system. Downstream capacity; and transmitting system level system control messages on another channel can achieve the gain obtained by macro diversity, which can further increase the downlink capacity of the system. Based on the transmission mode of the network side, when the UE selects a new cell, or the UE in the idle state or the active state receives the system control message change indication information sent by the network side, the system may broadcast the message or the system control message. The change indication information acquires the location where the system control message is located, so that the UE can obtain the changed system control message according to the location information, and the normal operation of the UE is ensured.

While the invention has been described by the embodiments of the present invention, it is understood that the invention

Claims

Rights request

A system control message sending method, comprising the steps of: after the system control message changes, the network side scheduling channel resource sends the changed system control message to the user equipment UE;

2. The method according to claim 1, wherein the method further comprises: dividing the system control message into: a first level system control message and a second level system control message.

3. The method of claim 2, wherein

The first level system control message is a cell level system control message, and the cell level system control message is valid only for the local cell;

The second level system control message is a system level system control message, and the system level system control message is shared for different cells within the system.

4. The method of claim 2, wherein

The first level system control message includes: a system control message related to cell selection and reselection and a system control message required for cell access; the second level system control message includes: All system control messages.

The method according to claim 2, wherein the first level system control message includes scheduling information of physical layer parameters and second level control information; and the second level system control message includes a first level system Control system control information other than messages.

The method according to claim 2, wherein the process of the network side scheduling channel resource sending the changed system control message to the UE is specifically:

The network side broadcasts the first level system control message to the idle state UE through the broadcast channel, and sends the second level system control message to the idle state UE through another channel other than the broadcast channel;

The other channels other than the broadcast channel are specifically: a multicast channel or a downlink shared channel or a dedicated channel.

7. The method according to claim 6, further comprising: network side notification The channel of the second level system control message includes:

The network side adds a switch indication parameter to the scheduling information included in the main message block of the system broadcast message.

8. A method according to any one of claims 2 to 7, characterized in that

The UE is in an idle state;

The system control message change indicates that a paging message through the paging channel is sent to the UE.

The method according to claim 1, wherein the UE is in an active state; the channel resources scheduled by the network side are specifically:

The network side schedules resources that are valid for all UEs on the downlink shared channel, and sends the system control message to all UEs in the activated state through the resource.

The method according to claim 9, wherein the system control message change indication information is sent to the UE through a control channel of the downlink shared channel.

The network side schedules resources valid for a single UE on the downlink shared channel, and sends the system control message to the UE by using the resource.

The method according to claim 11, wherein the system control message change indication information is sent to the UE through a control channel of a downlink shared channel.

The network side reserves a system control message sending resource on the downlink shared channel;

Sending the system control message to all UEs or a single UE or part through the reserved resource

UE.

The method according to claim 13, wherein the system control message change indication information is sent to the UE or a single UE or a part of the UE through a control channel of the downlink shared channel.

15. A method according to claim 10 or 12 or 14, wherein

The network side sends the location information of the system control message to the UE while transmitting the system control message indication information.

16. A system control message receiving method, comprising the steps of: When the user equipment UE selects a new cell or the UE receives the system control message change indication information sent by the network side, the location of the system control message is obtained according to the system broadcast message or the system control message change indication information;

17. The method of claim 16 wherein:

The UE is in an idle state;

The UE acquires system control message change indication information by using a system paging message.

The method according to claim 17, wherein the system control message change indication information is specifically a tag value in a main message block of a system paging message.

The method according to claim 18, wherein the location where the UE acquires the system control message includes:

After acquiring the system control message change indication information according to the label value in the main message block of the system paging message, the UE reads the main message block MIB in the system broadcast message and the scheduling information in the scheduling block; and obtains according to the scheduling information. The system controls where the message is located.

The method according to claim 16, wherein, when the UE selects a new cell, the location where the UE acquires the system control message includes: directly according to the main message block MIB and the scheduling block in the system broadcast message The scheduling information acquires the location of the system control message.

The method according to claim 16, wherein the UE is in an active state; the location where the UE acquires the system control message includes:

The UE reads the control channel of the downlink shared channel, and acquires a location where the system control message change indication information and the system control message are located.

The method according to claim 21, wherein the acquiring the system control message by the UE comprises: reading a downlink shared channel, and acquiring a system control message according to the location of the obtained system control message.

A system control message sending device, comprising:

a change indication information generating module, connected to the system control message extraction module, for After the control message changes, generating system control message change indication information;

The message sending module is respectively connected to the system control message extracting module, the change indication information generating module, and the resource scheduling module, and configured to: after the system control message changes, the changed system control message and the generated system control message The change indication information is sent to the UE by the resource scheduling module for the channel resource allocated by the resource scheduling module.

The device according to claim 23, wherein the device further comprises: a classification module, which is respectively connected to the system control message extraction module and the resource scheduling module, and is configured to classify system control messages, Dividing the system control message into: a first level system control message and a second level system control message, so that the resource scheduling module allocates a required channel resource according to the classification, where

The first level system control message is a cell level system control message, and the cell level system control message is valid only for the local cell; the second level system control message is a system level system control message, where the system level System control messages are shared for different cells within the system; or

The first level system control message includes: a system control message related to cell selection and reselection and a system control message required for cell access; the second level system control message includes: All system control messages;

Or,

The first level system control message includes scheduling information of physical layer parameters and second level control information; the second level system control message includes system control other than the first level system control message

'f 5 interest.

25. Apparatus according to claim 24 wherein:

The UE is in an idle state, and the second level system control message occupies other channel resources except the broadcast channel, where the first level system control message occupies a broadcast channel resource;

The system control message change indication information is delivered by using a paging channel resource.

26. Apparatus according to claim 23 wherein:

The UE is in an active state, and the system control message is delivered by using a downlink shared channel resource.

A system control message receiving device, which is disposed in the user equipment UE, and is characterized in that: a change indication information obtaining module, configured to acquire system control message change indication information according to information received by the user equipment UE;

The system control message extracting module is connected to the system control message location obtaining module, and is configured to extract a system control message according to the location where the system control message is located.

28. Apparatus according to claim 27 wherein:

When the UE is in an idle state, the change indication information acquiring module reads the paging channel, acquires the system control message change indication information, and reads the broadcast channel according to the information, and acquires a location where the system control message is located;

When the UE selects a new cell, the change indication information acquiring module directly reads the broadcast channel, and acquires a location where the system control message is located;

When the UE is in an active state, the change indication information acquiring module reads the control channel of the downlink shared channel, and acquires a location where the system control message is located.