Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W72/00—Local resource management
  • H04W72/20—Control channels or signalling for resource management
  • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

• the present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for transmitting and receiving a downlink control message.
• Logical channels can be divided into traffic channels and control channels.
• the control channel includes a Broadcast Channel (BCH), a Common Control Channel (CCCH), and a Dedicated Control Channel (DCCH). Further, the broadcast channel further includes a Broadcast Control Channel (BCCH), a Frequency Correction Channel (FCCH), and a Synchronisation Channel (SCH); and the common control channel includes a random access channel (Random Access) Channel, RACH), Paging Channel (PCH), Access Grant Channel (AGCH), and Cell Broadcast Channel (CBCH), of which only RACH is a unidirectional uplink channel, and the rest are One-way downlink channel.
• BCH Broadcast Channel
• CCCH Common Control Channel
• DCCH Dedicated Control Channel
• BCCH Broadcast Control Channel
• FCCH Frequency Correction Channel
• SCH Synchronisation Channel
• the common control channel includes a random access channel (Random Access) Channel, RACH), Paging Channel (PCH), Access Grant Channel (AGCH), and Cell Broadcast Channel (CBCH), of
• each cell has several carrier frequencies, and each carrier has 8 time slots.
• TS0 ⁇ TS7 A number of carrier frequencies in a cell are respectively recorded as C0, CI Cn, where CO is the carrier frequency of the BCCH channel.
• CO the carrier frequency of the BCCH channel.
• TS0 on the carrier frequency CO is used to map the broadcast and common control channels, as shown in Figure 1.
• the system configures the TS0 of the carrier frequency CO as the primary BCCH channel, and expands three combinations of CCCH channel configuration forms on the TS2, TS4 and TS6 of the carrier frequency CO, such as Figure 2 shows.
• the inventors found that at least the following problems exist in the prior art: In existing GSM networks, the Downlink Common Control Channel (CCCH) resources are limited. In general, it is only allocated on the TS0 of the carrier frequency CO, that is, there is only one CCCH channel; in most cases, only the four CCCH channels of the carrier CO, TS0, TS2, TS4 and TS6.
• CCCH Downlink Common Control Channel
• Embodiments of the present invention provide a method and an apparatus for transmitting and receiving a downlink control message, which are used to expand a downlink control channel capacity.
• a method for sending a downlink control message includes:
• a method for receiving a downlink control message includes:
• system message or a paging message receives a system message or a paging message, where the system message or the paging message includes an indication for monitoring a new downlink control channel; where the newly added downlink control channel is in a physical channel where the extended common control channel on the cell primary carrier frequency is located Idle time slot mapping is obtained;
• a network device including:
• mapping unit configured to map an idle time slot in a physical channel where the extended common control channel on the cell primary carrier frequency is located to a downlink control channel
• a sending unit configured to send, by using the downlink control channel, a downlink control message.
• a terminal comprising:
• a first receiving unit configured to receive a system message or a paging message, where the system message or the paging message includes an indication for monitoring a newly added downlink control channel;
• the idle time slot mapping in the physical channel where the extended common control channel is located on the carrier frequency is obtained;
• the second receiving unit is configured to receive the downlink control message by using the newly added downlink control channel.
• FIG. 1 is a schematic diagram showing a mapping relationship of a primary BCCH channel on a carrier frequency CO in a prior art
• FIG. 1 is a schematic diagram showing a mapping relationship of an extended CCCH channel on a carrier frequency CO in a prior art
• FIG. 3 is a flowchart of a method for transmitting a downlink control message according to Embodiment 1 of the present invention
• FIG. 4 is a flowchart of a method for receiving a downlink control message according to Embodiment 1 of the present invention
• FIG. 6 is a schematic structural diagram of a terminal according to Embodiment 1 of the present invention.
• FIG. 7 is a schematic structural diagram of a communication system according to Embodiment 1 of the present invention.
• FIG. 8 is a flowchart of a method for transmitting and receiving a downlink control message according to Embodiment 2 of the present invention
• FIG. 9 is a schematic diagram of a downlink control channel mapping manner 1 according to Embodiment 2 of the present invention
• FIG. 11 is a schematic diagram of a downlink control channel mapping manner 3 in Embodiment 2 of the present invention
• FIG. 12 is a schematic diagram of a downlink control channel mapping manner 4 in Embodiment 2 of the present invention
• 13 is a schematic diagram of a downlink control channel mapping manner 5 in Embodiment 2 of the present invention
• FIG. 14 is a flowchart of a method for transmitting and receiving a downlink control message according to Embodiment 3 of the present invention
• FIG. 15 is a schematic structural diagram of a network device according to Embodiment 4 of the present invention.
• FIG. 16 is a schematic structural diagram of a terminal in Embodiment 4 of the present invention. detailed description
• 51 multiframes are generally used as a cyclic period to carry logical channels such as a broadcast channel BCH and a public control channel CCCH.
• logical channels such as a broadcast channel BCH and a public control channel CCCH.
• the mapping structure of the BCCH channel and the PCH channel in the figure, the PCH channel is taken as an example) in the extended CCCH channel in the figure, and the BCCH channel and the PCH channel in the primary BCCH channel in FIG. 1 (take the PCH channel as an example)
• the mapping structure is the same.
• the PCH channel and the AGCH channel can share the same physical channel resource.
• the mobile terminal needs to listen to paging messages belonging to its own paging group when it is in an idle state.
• the network When the mobile terminal initiates the access procedure, the network first sends a random access request message to the network side, and then listens to all downlink common control channels of the time slot in which the paging group of the mobile terminal belongs, and the network side sends an AGCH message in the downlink CCCH.
• the frequency correction channel FCCH and the synchronization channel SCH can only appear in the physical channel where the primary BCCH channel on the carrier CO is located, that is, slot 0; the FCCH channel and the SCH do not appear in the physical channel where the extended common control channel CCCH is located.
• the channel, then the frame corresponding to the FCCH channel and the SCH channel in the physical channel in which the primary BCCH channel is located is idle.
• the above idle frames do not correspond to any logical channels, that is, the idle slots corresponding to the idle frames do not need to carry any information during the communication process.
• the idle time slot in the foregoing may be a frame number of 0, 1, 10, 11, 20, 21, 30, 31, 40, 41, 50 in the physical channel where the extended common control channel is located.
• a time slot corresponding to some or all of the frames in the idle frame, a free time slot described in the embodiment of the present invention is a burst.
• the idle frames in the extended CCCH channel on the cell carrier frequency CO are fully utilized, and are sent through the time slots corresponding to the idle frames. Downstream control message. In this way, not only the utilization of the downlink channel is improved, but also the problem that the access failure occurs when multiple terminals simultaneously initiate an access request due to the lack of the downlink common control channel can be alleviated.
• Embodiment 1 is a diagrammatic representation of Embodiment 1:
• the method for sending a downlink control message on the network side includes:
• the downlink control channel may be used to transmit one of a downlink common control message such as a paging message, an access response message, and a cell broadcast message.
• a downlink common control message such as a paging message, an access response message, and a cell broadcast message.
• the execution body of each step may be a base station or other network device.
• the embodiment of the present invention further provides a method for receiving a downlink control message based on the terminal side.
• the method for receiving a downlink control message on the terminal side includes:
• the idle time slot map is obtained.
• the terminal can also report whether the capability of supporting the newly added downlink control channel is reported to the network side, and the network side determines whether to pass the new downlink according to the capability of different terminals.
• the control channel sends a downlink control message.
• the extended common control channel CCCH described in the above embodiment is a common control channel located on time slot 2, and/or time slot 4, and/or time slot 6 on the cell primary carrier frequency, since only the FCCH channel and the SCH channel are set. In the physical channel where the primary BCCH channel of the cell carrier CO is located, therefore, the idle time slot corresponding to the physical channel in which the common control channel CCCH is located appears.
• the idle time slot in the physical channel where the extended common control channel CCCH is located may be the time slot 2 in the cell carrier frequency CO or the idle time slot in the time slot 4 or the time slot 6, that is, the extended common control channel
• the blank slot may be corresponding to the frequency correction channel FCCH and the synchronization channel SCH in the physical channel where the primary BCCH channel is located, and in the last frame of the 51 multiframe structure.
• the time slot corresponding to all or part of the frame.
• the downlink control channel may be a downlink common control channel such as a paging channel PCH, an access response channel AGCH, or a cell broadcast channel CBCH.
• a downlink common control channel such as a paging channel PCH, an access response channel AGCH, or a cell broadcast channel CBCH.
• the idle time slot in the physical channel where the extended common control channel CCCH on the cell primary carrier frequency CO is located is mapped to the downlink control channel, four idle time slots, or two idle time slots, or one idle time may be used.
• the time slots form a radio block for carrying downlink control messages.
• the above mapping scheme is preferably applied in 51 multiframes in embodiments of the present invention. specifically,
• the corresponding time slots of four idle frames in one 51 multiframe may be mapped into one radio block, where the four idle frames include two sets of idle frames, where each set of idle frames includes two consecutive idle frames;
• the two idle blocks can be separated by two radio blocks or eight non-idle frames.
• the two sets of idle frames can also be any two idle frames in a 51 multiframe.
• the four idle frames can also be Any four idle frames in a 51 multiframe.
• the corresponding time slot of any one of the 51 multiframes is mapped to one radio block.
• the network side device may further send an indication to the terminal to monitor the new downlink control new channel, and further include the indication information of the newly added downlink control channel mapping manner.
• the network side device may also determine whether to send the downlink control message by using the newly added downlink control channel according to the capability information reported by the terminal.
• the embodiment of the present invention further provides a network device 50 and a terminal 60 that can be used to implement the foregoing method.
• the network device 50 includes:
• the mapping unit 51 is configured to map an idle time slot in a physical channel where the extended common control channel on the cell primary carrier frequency is located to a downlink control channel, where the newly added downlink control channel is an extended common control channel on the cell primary carrier frequency The idle time slot mapping in the physical channel is obtained;
• the sending unit 52 is configured to send a downlink control message by using the downlink control channel.
• the terminal 60 includes:
• the first receiving unit 61 is configured to receive a system message or a paging message, where the system message or the paging message includes an indication for monitoring a newly added downlink control channel, where the newly added downlink control channel is extended by a cell carrier frequency carrier.
• the idle time slot mapping in the physical channel in which the control channel is located is obtained.
• the second receiving unit 62 is configured to receive a downlink control message by using the newly added downlink control channel.
• the method for transmitting and receiving the downlink control message, the network device, and the terminal may be applied to the communication system to form a communication system capable of realizing the downlink control channel capacity expansion.
• the communication system includes the above network device 50 and terminal 60;
• the network device 50 is configured to send the physical signal of the extended common control channel on the cell main carrier frequency
• the idle time slot in the track is mapped to the downlink control channel, and the downlink control message is sent by using the downlink control channel;
• the terminal 60 is a terminal that can support the downlink control channel, and is configured to listen to the downlink control channel and receive the downlink control message.
• the method and device for transmitting and receiving a downlink control message provided by the embodiment of the present invention, by mapping the idle time slot in the physical channel where the extended common control channel CCCH on the primary carrier frequency of the cell is mapped to the downlink control channel, so that the existing The idle time slot in the physical channel where the extended common control channel CCCH is located can be fully utilized to improve the utilization of the channel resources, thereby realizing the expansion of the downlink control channel capacity; and simultaneously, the physical medium in which the extended common control channel CCCH is located
• the idle time slot in the channel to send the downlink control message can alleviate the problem of lack of the downlink common control channel and reduce the phenomenon of terminal access failure.
• Embodiment 2 is a diagrammatic representation of Embodiment 1:
• the method for transmitting and receiving a downlink control message in the embodiment of the present invention is further described by taking the network device as a base station as an example.
• the network device may also be a base station controller, or a combination of a base station and a base station controller (BSC).
• BSC base station controller
• the method for sending and receiving a downlink control message specifically includes the following steps:
• the base station maps the idle time slot in the physical channel where the CCCH of the extended common control channel on the cell primary carrier frequency CO is located to the downlink control channel.
• the scheme in the present invention is described by taking the idle time slot as an access response channel AGCH as an example.
• the downlink control channel may of course also be a paging channel PCH or a cell broadcast channel CBCH.
• the implementation manner of mapping the idle time slot in the physical channel where the extended common control channel CCCH on the carrier frequency CO is located to the AGCH channel may be the physical channel where the same extended common control channel CCCH is located on the carrier frequency CO.
• 4 idle time slots, or 2 idle time slots, or 1 free time slot will be combined into one radio block; the radio block is used to carry downlink control messages.
• the specific implementation of the above channel mapping can be implemented in multiple ways.
• the cell primary carrier frequency CO adopts 51 multiframes; the above-mentioned physical channel in which the same extended common control channel CCCH is located on the cell main carrier CO forms four radio slots into one radio block, which may be:
• the four idle frames in the same 51 multiframe may be a frame with a frame number of 0, 1, 10, 11 in a 51 multiframe and/or a frame number of 20, 21, 30 in the 51 multiframe. a frame of 31; or, four idle frames in the same 51 multiframe are frames of frame numbers 10, 11, 20, 21 in a 51 multiframe and/or frame numbers in the 51 multiframe are Frames of 30, 31, 40, 41.
• 51 multiframes are used on the cell main carrier CO to carry logical channels such as BCH and CCCH;
• the frame number of each 51 multiframe is 0, 1, 10,
• the corresponding time slot of the frame of 11 is mapped to one radio block blockO, and the corresponding time slot of the frame with frame numbers 20, 21, 30, 31 in the 51 multiframe is mapped into one radio block block1.
• the newly composed radio block can be used as a downlink control channel, such as a downlink common control channel such as an AGCH channel.
• a downlink control channel such as a downlink common control channel such as an AGCH channel.
• two AGCH resource blocks can be added in each 51 multiframe.
• 51 multiframes are used on the cell main carrier C0 to carry logical channels such as BCH and CCCH;
• the corresponding time slot mapping of the frame numbers 0, 1, 10, 11 in the first 51 multiframe is grouped by two adjacent 51 multiframes.
• the corresponding time slot of a frame of a radio block block0, frame number 20, 21, 30, 31 is mapped to one radio block block1
• the frame number of the second 51 multiframe frame is 10, 11, 20, 21
• the corresponding time slot of the frame is mapped to one radio block block3
• the corresponding time slot of the frame with frame number 30, 31, 40, 41 is mapped to one radio block block4
• the frame number in the first 51 multiframe is The corresponding time slot of the frame of 40, 41 and the frame number of 0, 1 in the second 51 multiframe is mapped to one radio block block2.
• the first 51 multiframe and the second 51 multiframe may be an odd 51 multiframe in the current channel and an even adjacent 51 multiframe in the current channel, or in the current channel.
• channel mapping When channel mapping is performed, it is first calculated that each frame belongs to the 51st multiframe, and then the 51st multiframe is calculated to be an odd number 51 multiframe or an even 51 multiframe.
• the corresponding time slot of the frame with the frame number of 0, 1, 10, 11 in the odd-numbered 51 multiframes is mapped to the corresponding time slot mapping of the frame of the radio block block0 and the frame numbers 20, 21, 30, 31.
• the corresponding time slots of the frames with the frame numbers 10, 11, 20, 21 in the even 51st multiframe are mapped to the corresponding blocks of the radio block block 3 and the frame numbers 30, 31, 40, 41.
• the time slot is mapped to the radio block block 4, and the corresponding time of the frame having the frame number of 0, 1 in the frames of the odd number 51 multiframes and the frames of the subsequent 51th multiframes
• the slot is mapped to the radio block block2.
• the channel allocation is similar to the above. I will not repeat them here.
• the newly formed radio block can be used as a downlink control channel, such as a downlink common control channel such as an AGCH channel.
• a downlink control channel such as a downlink common control channel such as an AGCH channel.
• 5 AGCH resource blocks can be added in every two 51 multiframes. Way three
• 51 multiframes are used to carry logical channels such as BCH and CCCH; specifically, in the TS2/TS4/TS6 of the carrier frequency CO, the adjacent four 51 multiframes are grouped;
• mapping the corresponding time slot of the frame with the frame number 0, 1, 10, 11 in the first 51 multiframe to a radio block block0, and the corresponding time slot of the frame number 20, 21, 30, 31 is mapped as a radio block block1
• Corresponding time slots are mapped to one radio block block 4
• frames of frame numbers 40, 41 in the first 51 multiframe and frames of frame numbers 0, 1 in the second 51 multiframe are Corresponding time slots are mapped to one radio block block2;
• the corresponding time slot of the frame with the frame number 0, 1, 10, 11 in the third 51 multiframe is mapped to the corresponding time of one radio block block0 and the frame number 20, 21, 30, 31.
• the slot is mapped to a radio block block1
• the corresponding slot of the frame with the frame number of 10, 11, 20, 21 in the fourth 51 multiframe is mapped to one radio block block3, and the frame numbers are 30, 31, 40, 41.
• the corresponding time slot of the frame is mapped to one radio block block 4, and the frame number of the frame number 40, 41 in the third 51 multiframe and the frame number in the fourth 51 multiframe are 0, 1
• Corresponding time slots of the frame are mapped to one radio block block2;
• the corresponding time slot combination of the frame number 50 of the first, second, third, and fourth 51 multiframes is mapped to one radio block block 5.
• the newly composed radio block can be used as a downlink control channel, such as a downlink common control channel such as an AGCH channel.
• a downlink control channel such as a downlink common control channel such as an AGCH channel.
• 11 AGCH resource blocks can be added in every four 51 multiframes.
• the adjacent 4 idle frames are taken, that is, the selected 4 idle frames include two sets of idle frames, and each The group idle frame further includes two consecutive idle frames, and the two sets of idle frames are separated by two radio blocks or 8 Non-idle frames; however, the scope of protection of the present invention is not limited thereto, and it is of course possible to take any two sets of idle frames, such as 4 idle frames with frame numbers 0, 1, 20, 21, or 51 multi-frames.
• the four idle frames are randomly extracted in the idle frame to be mapped into one radio block, for example, four idle frames with frame numbers of 0, 11, 30, and 50.
• the network side device such as the base station
• the terminal of the specific mapping mode after the channel mapping is completed, normal communication between the network side and the terminal is not affected.
• two free time slots are formed into one radio block, which may be:
• This implementation is similar to Mode 1, but in this implementation, two time slots are used as one radio block. specifically,
• 51 multiframes are used on the cell main carrier CO to carry logical channels such as BCH and CCCH;
• the corresponding time slot of the frame with the frame number of 0, 1 in each 51 multiframe is mapped to one radio block blockO, and the corresponding frame of the frame number is 10, 11
• the time slot is mapped to a radio block block1
• the corresponding time slot of the frame with frame numbers 20 and 21 is mapped to one radio block block2
• the corresponding time slot of the frame with frame numbers 30 and 31 is mapped to a radio block block3
• the corresponding time slot of the frame with frame numbers 40, 41 is mapped to one radio block block 4.
• the newly formed radio block can be used as a downlink control channel, such as a downlink common control channel such as an AGCH channel.
• a downlink control channel such as a downlink common control channel such as an AGCH channel.
• 5 AGCH resource blocks can be added in each 51 multiframe. Way five
• 51 multiframes are used to carry logical channels such as BCH and CCCH; specifically, in the TS2/TS4/TS6 of the carrier frequency CO, two adjacent 51 multiframes are grouped;
• the corresponding time slots of frames 20 and 21 are mapped to one radio block 2
• the corresponding time slots of frames of frame numbers 30 and 31 are mapped to one radio block block 3
• the corresponding frames of frames 40 and 41 are corresponding.
• the slot is mapped to a radio block block4;
• the corresponding time slots of frames 20 and 21 are mapped to one radio block block 7, and the corresponding time slots of frames of frame numbers 30 and 31 are mapped to one radio block block 8, and the corresponding frames of frame numbers 40 and 41 are corresponding.
• the slot is mapped to a radio block block9;
• the corresponding time slot combination of the frame of frame number 50 in the first 51 multiframe and the second 51 multiframe is mapped into one radio block block10.
• the newly composed radio block can be used as a downlink control channel, such as a downlink common control channel such as an AGCH channel.
• a downlink control channel such as a downlink common control channel such as an AGCH channel.
• 10 AGCH resource blocks can be added in every two 51 multiframes.
• any one of the 51 multi-frames can be used to map to one radio block. Specific examples are as follows:
• the 51 multi-frame is used to carry the logical channel such as BCH and CCCH on the cell main carrier C0.
• the frame number in each 51 multiframe is 0, 1
• Any one or more of the corresponding time slots of the frames of 10, 11, 20, 21, 30, 31, 40, 41, 50 constitute one or more radio blocks, that is, one time slot is mapped to one radio block.
• the mapped new radio block can be used as a downlink control channel, such as a downlink common control channel such as an AGCH channel.
• 11 AGCH resource blocks can be added in each 51 multiframe.
• the AGCH channel is taken as an example, and the newly added downlink control channel may of course be a PCH channel or a CBCH channel.
• the base station sends a system message or a paging message to the terminal, where the system message or the paging message includes an indication for monitoring the downlink control channel.
• the downlink control channel is the new downlink common control channel added in step 801.
• the AGCH channel is still used as an example.
• the network side indicates that the terminal needs to monitor the newly added AGCH channel by using a system message or a paging message. Specifically, one or more bits (bits) may be added to the SI2quater, SB, or other system messages. Carrying the indication information.
• the base station maps the idle time slot in the physical channel where the extended common control channel CCCH on the cell main carrier CO is located to the downlink control channel such as the AGCH
• the implementation manner is unique. For example, only the six times listed in the foregoing step 801 are selected.
• a bit may be added to the system message, and the bit is used to indicate that the terminal having the capability of supporting the added downlink control channel is to listen to the newly added AGCH channel on the CCCH channel where the terminal is located.
• the base station adopts two or more implementations for mapping the idle time slot in the physical channel where the extended common control channel CCCH on the cell primary carrier frequency COCH is located to the downlink control channel such as AGCH, then it is necessary to A plurality of bits are added to the system message as indicator bits.
• the indicator bit can not only notify the terminal having the capability of supporting the added downlink control channel to listen to the newly added AGCH channel on the CCCH channel where the terminal is located, but also can indicate the use of the newly added AGCH channel by the terminal.
• the mapping mode that is, the system message further includes information indicating a mapping manner of the downlink control channel.
• the terminal After receiving the system message, the terminal having the capability of supporting the new AGCH channel, after transmitting the access request message to the base station, monitors the above new additions except for listening to all existing PCH channels and dedicated AGCH channels.
• AGCH channel
• the base station sends a downlink control message by using the downlink control channel.
• the base station can send an access response message by using the new AGCH channel, so as to alleviate the problem that the access control fails due to lack of downlink control channel resources when a plurality of terminals (for example, M2M terminals) initiate an access request at the same time.
• a plurality of terminals for example, M2M terminals
• steps 802 and 803 may be repeated multiple times.
• the method for transmitting and receiving a downlink control message by mapping an idle time slot in a physical channel where the extended common control channel CCCH on the primary carrier frequency of the cell is mapped to a downlink control channel, so that the existing extended public control is performed.
• the idle time slot in the physical channel where the channel CCCH is located can be fully utilized to improve the utilization of the channel resources, thereby realizing the expansion of the downlink control channel capacity; and simultaneously utilizing the idleness in the physical channel where the extended common control channel CCCH is located
• the time slot to send the downlink control message can alleviate the problem of lack of the downlink common control channel and reduce the phenomenon of terminal access failure.
• Embodiment 3 is a diagrammatic representation of Embodiment 3
• the method for transmitting and receiving downlink control messages in the embodiment of the present invention is further described by taking the network device as a base station as an example.
• the network device may also be a base station controller, or a combination of a base station and a base station controller.
• the method for transmitting and receiving a downlink control message specifically includes the following steps:
• the base station maps the idle time slot in the physical channel where the CCCH of the extended common control channel on the cell primary carrier frequency CO is located to the downlink control channel.
• the scheme in the present invention is described by taking the idle time slot as an access response channel AGCH as an example.
• the downlink control channel may of course also be a paging channel PCH or a cell broadcast channel CBCH.
• the method for mapping the idle time slot in the physical channel on which the extended CCCH channel is located on the carrier frequency CO to the AGCH channel is basically the same as that in the second step 801 of the second embodiment, and details are not described herein again.
• the base station receives terminal capability information provided by the terminal, where the terminal capability information indicates Whether the terminal supports the downlink control channel.
• the terminal sends terminal capability indication information to the network side, indicating whether the terminal has the capability of supporting a new downlink control channel.
• the method for the terminal to send the capability indication information to the base station may be that the capability of the new downlink control channel is included in the wireless capability information and sent to the network, or the capability indication information may be added to the access request message to notify the current network. Whether the terminal can support the new downlink control channel.
• the terminal will listen to its own new downlink paging channel.
• the network side can send and receive the access response message for the terminal to the newly added AGCH channel after the terminal capability indication information is obtained. After transmitting the access request message, the terminal having the capability of reading the newly added AGCH channel needs to monitor the newly added AGCH channel in addition to listening to all existing PCH and dedicated AGCH channels.
• the base station sends, by using the downlink control channel, a downlink control message to a terminal that supports the downlink control channel.
• steps 1402 and 1403 may be repeated multiple times.
• the method for transmitting and receiving a downlink control message by mapping an idle time slot in a physical channel where the extended common control channel CCCH on the primary carrier frequency of the cell is mapped to a downlink control channel, so that the existing extended common channel is implemented.
• the idle time slot in the physical channel where the CCCH is located can be fully utilized to improve the utilization of the channel resources, thereby realizing the expansion of the downlink control channel capacity. Meanwhile, the idle time in the physical channel where the extended common control channel CCCH is located is utilized.
• the transmission of the downlink control message can alleviate the problem of lack of the downlink common control channel and reduce the phenomenon of terminal access failure.
• the terminal may first report its terminal capability information to the base station, and inform the base station whether it supports the new downlink control channel, and then the base station may be based on the capability of the terminal.
• the information is sent to the terminal that supports the newly added downlink control channel, and the terminal that supports the newly added downlink control channel can monitor the newly added downlink control channel to obtain the corresponding downlink control message after reporting the terminal capability information of the terminal. .
• Embodiment 4 is a diagrammatic representation of Embodiment 4:
• a network device and a terminal that can be used to implement the foregoing method for transmitting and receiving downlink control messages are provided.
• the network device includes: a mapping unit 151 and a sending unit 152.
• the mapping unit 151 is configured to map an idle time slot in a physical channel where the extended common control channel CCCH on the cell primary carrier frequency is located to a downlink. Control channel
• the sending unit 152 is configured to send a downlink control message by using the downlink control channel.
• the primary carrier frequency CO uses 51 multiframes to carry downlink control channels such as BCH and CCCH.
• the mapping of the vacant time slot in the physical channel on which the extended common channel CCCH is located on the carrier CO is mapped to the AGCH channel, and the mapping unit 151 in this embodiment may also be specific.
• the mapping unit 151 in this embodiment may also be specific.
• the radio block is configured to carry a downlink control message.
• the mapping unit is specifically configured to map, in a physical channel where the same extended common control channel is located on the primary carrier frequency of the cell, a corresponding time slot of four idle frames in a 51 multiframe into one a radio block, the four idle frames include two sets of idle frames in the same 51 multiframe, wherein each set of idle frames includes two consecutive idle frames; two sets of idle frames may be separated by two radio blocks or eight Non-idle frames; Of course, the two sets of idle frames may also be any two sets of idle frames in a 51 multiframe. Further, the four idle frames may also be any four idle frames in a 51 multiframe.
• the frame with the frame number of 50 in the 51 multiframe and the other three consecutive to the 51 multiframe The corresponding slot combination of the frame with the frame number 50 in the 51 multiframe is mapped to one radio block.
• the four idle frames in the same 51 multiframe may be a frame with a frame number of 0, 1, 10, 11 in a 51 multiframe and/or a frame number in the 51 multiframe is 20, 21, 30, 31 frames; or, the four idle frames in the same 51 multiframe are frames of frame numbers 10, 11, 20, 21 in a 51 multiframe and/or frames in the 51 multiframe Frames numbered 30, 31, 40, 41.
• mapping units are also provided in this embodiment. For example:
• the mapping unit 151 includes a first mapping module, where the first mapping module is configured to set the frame number in the 51 multiframe to 0, 1, 10, 11 in TS2/TS4/TS6 on the cell primary carrier frequency.
• the corresponding time slot of the frame is mapped to one radio block, and the corresponding time slot of the frame with the frame number of 20, 21, 30, 31 in the 51 multi-frame is mapped into one radio block;
• the mapping unit 151 includes a second mapping module, where the second mapping module is configured to use the two adjacent 51 multiframes in the TS2/TS4/TS6 on the cell primary carrier frequency, and the first one
• the corresponding time slot of the frame with frame numbers 0, 1, 10, and 11 in the multiframe is mapped to one radio block, and the corresponding time slot of the frame with frame numbers 20, 21, 30, and 31 is mapped to a radio block.
• the corresponding time slot of the frame with the frame number of 10, 11, 20, 21 in the second 51 multiframe is mapped to one radio block, and the corresponding time slot of the frame with frame numbers 30, 31, 40, 41 is mapped to one wireless.
• the mapping unit 151 includes a third mapping module, where the third mapping module is configured to group the adjacent four 51 multiframes in the TS2/TS4/TS6 on the cell primary carrier frequency, and the first one
• the corresponding time slot of the frame with frame numbers 0, 1, 10, and 11 in the multiframe is mapped to one radio block, and the corresponding time slot of the frame with frame numbers 20, 21, 30, and 31 is mapped to a radio block.
• the corresponding time slot of the frame with the frame number of 10, 11, 20, 21 in the second 51 multiframe is mapped to one radio block, and the corresponding time slot of the frame with frame numbers 30, 31, 40, 41 is mapped to one wireless.
• Block, and in the first 51 multiframe Frames with frame numbers 40, 41 and corresponding slots of frames with frame numbers 0 and 1 in the second 51 multiframe are mapped to one radio block;
• the radio block maps the corresponding time slot of the frame with the frame number of 10, 11, 20, 21 in the fourth 51 multiframe to a radio block, and the corresponding time slot of the frame with the frame number of 30, 31, 40, 41 Mapping to a radio block, and mapping the corresponding slot of the frame with the frame number 40, 41 in the third 51 multiframe and the frame number 0, 1 in the fourth 51 multiframe For a wireless block;
• the corresponding time slot combination of the frame number 50 of the first, second, third, and fourth 51 multiframes is mapped to one radio block.
• mapping unit may be further configured to map a corresponding time slot of two consecutive idle frames in a 51 multiframe in a physical channel where the same extended common control channel is located on the primary carrier frequency of the cell.
• the frame corresponding to the frame number 50 in the 51 multiframe and the corresponding slot combination of the frame having the frame number 50 in the other 51 multiframe consecutive to the 51 multiframe are mapped into one radio block.
• mapping unit can be explained by the following example:
• the mapping unit 151 includes a fourth mapping module, where the fourth mapping module is configured to correspond to a frame with a frame number of 0 and 1 in 51 multiframes in TS2/TS4/TS6 on the cell primary carrier frequency.
• the time slot is mapped to a radio block, and the corresponding time slot of the frame with the frame number of 10, 11 is mapped to one radio block, and the corresponding time slot of the frame with the frame number of 20, 21 is mapped to a radio block, and the frame number is The corresponding time slots of the frames of 30 and 31 are mapped into one radio block, and the corresponding time slots of the frames with frame numbers 40 and 41 are mapped into one radio block;
• the mapping unit 151 includes a fifth mapping module, configured to use the two adjacent 51 multiframes as a group in the TS2/TS4/TS6 on the cell primary carrier frequency, and the first mapping unit 151
• the corresponding time slot of the frame with frame number 0 and 1 in the multiframe is mapped to one radio block, and the corresponding time slot of the frame with frame numbers 10 and 11 is mapped to one radio block, and the frame number is 20, 21
• the corresponding time slot combination of the frame number 50 of the first 51 multiframe and the second 51 multiframe is mapped into one radio block.
• mapping unit may be further configured to map a corresponding time slot of one idle frame in the 51 multiframe into one radio block; for example,
• the mapping unit 151 includes a sixth mapping module, where the sixth mapping module is configured to set the frame number in the 51 multiframe to 0, 1, 10, 11 in TS2/TS4/TS6 on the cell primary carrier frequency. Any one or more of the corresponding time slots of the frames of 20, 21, 30, 31, 40, 41, 50 constitute one or more radio blocks, that is, one time slot is mapped to one radio block.
• the above radio block can be used as a downlink control channel, such as a downlink common control channel such as AGCH.
• the system sends a system message or a paging message to the terminal by using the sending unit 152, where the system message or the paging message includes monitoring the downlink.
• the indication of the control channel in general, the network device such as the base station may set a single implementation manner for the mapping unit, so that when the system message or the paging message is sent to the terminal, only the indication for monitoring the downlink control may be carried;
• the mapping unit has multiple implementation modes at the same time, and there are multiple implementation manners for mapping the idle time slot to the downlink control channel, the downlink control needs to be added to the system message or the paging message.
• Information about the mapping mode of the channel this not only informs the terminal to listen to the newly added downlink control channel, but also indicates the mapping mode adopted by the terminal for the newly added downlink control channel.
• the terminal having the capability to support the newly added downlink control channel receives the system.
• the above new downlink control channel can be used after the message.
• the network device provided in this embodiment may further include a receiving unit 153; the receiving unit 153 is configured to receive terminal capability information provided by the terminal, where the terminal capability information indicates whether the terminal supports the downlink control channel;
• the sending unit 152 sends a downlink control message to the terminal supporting the downlink control channel through the downlink control channel.
• the terminal informs the network side of its own capability, and then the network side indicates that the terminal having the capability of supporting the newly added downlink control channel uses the newly added downlink control channel.
• the terminal in the embodiment of the present invention includes: a first receiving unit 161 and a second receiving unit 162;
• the first receiving unit 161 is configured to receive a system message or a paging message sent by the network device, where the system message or the paging message includes an indication for monitoring a newly added downlink control channel, where the newly added downlink control channel is hosted by the cell.
• the idle time slot mapping in the physical channel where the extended common control channel is located on the frequency is obtained;
• the second receiving unit 162 is configured to receive the downlink control by using the newly added downlink control channel. Further, the terminal further includes:
• the sending unit 163 is configured to report, to the network device, terminal capability information of the current terminal, where the terminal capability information indicates whether the terminal supports the downlink control channel.
• the network device and the terminal in this embodiment are used to complete the process of sending and receiving the downlink control message, and the method in the second embodiment and the third embodiment is described, and details are not described herein again.
• the idle time slot in the physical channel where the extended common control channel CCCH on the cell primary carrier frequency is mapped is mapped to the downlink control channel, so that the existing extended common control channel CCCH is located in the physical channel.
• the idle time slot can be fully utilized to improve the utilization of the channel resources, thereby realizing the expansion of the downlink control channel capacity.
• the downlink control message can be mitigated by using the idle time slot in the physical channel where the extended common channel CCCH is located.
• the problem of lack of downlink control channel reduces the phenomenon of terminal access failure.

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• 2011
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