CN104104466A - Broadcast channel transmitting and receiving method, system and equipment - Google Patents

Abstract

The present invention relates to the technical field of wireless communication, in particular to a method, system and equipment for sending and receiving broadcast channels, so as to enhance the transmission of broadcast channels. The method in the embodiment of the present invention includes: the network side device determines the wireless frame that needs to carry the broadcast channel in the time period; the network side device performs spread spectrum processing on the information carried in the broadcast channel, and transmits the information to the user equipment on the determined wireless frame Send broadcast channel. Since the network side device in the embodiment of the present invention performs spread spectrum processing on the information carried in the broadcast channel before sending it, the receiving end will obtain a spreading gain, which is equivalent to increasing the received signal power of the receiving end. The transmission broadcast channel has been enhanced.

Description

A method, system and device for sending and receiving broadcast channels

technical field

The present invention relates to the technical field of wireless communication, in particular to a method, system and equipment for sending and receiving broadcast channels.

Background technique

In the current LTE (Long Term Evolution, long-term evolution) system, PBCH (Physical Broadcast Channel, Physical Broadcast Channel) bears: downlink bandwidth indication information (3 bits), PHICH (Physical Hybrid-ARQ Indication Channel, physical layer hybrid automatic retransmission indication channel ) channel configuration information (3 bits), system frame number (8 bits) and 10 idle bits. The downlink bandwidth indication information indicates the downlink system bandwidth of the carrier where the PBCH is sent. PHICH is used to carry confirmation information on whether the data on the PUSCH (Physical Uplink Shared Channel) sent by the user equipment is received correctly. When the eNB (Evolved Node Base station, evolved base station) does not correctly detect the UE (User Equipment , user equipment) when sending PUSCH, PHICH carries NACK (Negative Acknowledge, negative confirmation), otherwise, carries ACK (Acknowledge, confirmation). Here, the PHICH configuration information refers to the OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) symbols occupied in the time domain during PHICH resource mapping and the number of PHICH groups in the frequency domain. The system frame number is numbered from frame #0 to frame #1023, and then starts to cycle from #0. A total of 10 bits are required to indicate the numbers of 1024 frames, and the PBCH only carries the upper 8 bits, and the lowest 2 bits are obtained by detecting the scrambling code of the PBCH. The maximum coverage of a cell generally refers to the signal sent by the base station with the maximum transmission power. If the UE can correctly detect the transmitted signal with a certain probability, the location of the UE is within the coverage of the cell. There are many factors affecting cell coverage, including: penetration loss of wireless signals, sensitivity of user receivers, and so on. Among them, the building is the main factor causing the signal penetration loss, especially between floors, especially in the basement scene, the signal penetration loss is very large. Taking Fig. 1 as an example, UE1, UE2, UE3, UE4 and UE5 are at the same distance from the base station, but UE1 and UE4 are located in the open air or on the ground; UE2, UE3 and UE4 are respectively located in the basement. Tests show that, compared with UEs on the ground, users in the basement have nearly 20dB loss in receiving signals sent by the base station. In other words, from the perspective of the base station, the range that can cover basement users is much smaller than the range that can cover ground users. In order to achieve the same coverage for basement UEs and ground UEs, it is necessary to enhance the received signal of basement UEs to improve the received signal-to-noise ratio of basement user signals, that is, to compensate for the penetration of floors compared with UEs that are far from the base station Loss, so that the signal strengths received by basement UEs and ground UEs are also equivalent, so as to achieve the purpose of coverage enhancement. If the UE cannot receive the PBCH, it cannot obtain the SFN (System Frame Number, system frame number), and cannot perform data transmission.

Contents of the invention

The present invention provides a method, system and equipment for sending and receiving broadcast channels to enhance transmission of broadcast channels.

In a first aspect, a method for sending a broadcast channel is provided, including:

The network side device determines the wireless frame that needs to carry the broadcast channel in the time period;

The network side device sends the broadcast channel to the user equipment on the determined wireless frame after performing spread spectrum processing on the information carried in the broadcast channel.

With reference to the first aspect, in a first possible implementation manner, the network side device determines the wireless frame that needs to bear the broadcast channel in the time period, including:

According to the correspondence between the time period and the wireless frame, the network side device uses the wireless frame corresponding to the time period as the wireless frame that needs to bear the broadcast channel in the time period.

With reference to the first aspect or the first possible implementation of the first aspect, in a second possible implementation, the network side device performs spread spectrum processing on the information carried on the broadcast channel, including:

The network side device uses a specific sequence corresponding to the time period to perform spread spectrum processing on the information carried in the broadcast channel;

Wherein, each time period in the cycle corresponds to a different specific sequence.

With reference to the first possible implementation manner of the first aspect, in a third possible implementation manner, the specific sequences corresponding to each time period in the period are orthogonal to each other.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a fourth possible implementation manner, the network side device sending the broadcast channel to the user equipment on the determined radio frame includes:

The network side device uses a specific sequence corresponding to the time period to perform spread spectrum processing on the information carried in the broadcast channel;

Wherein, each time period in the cycle corresponds to the same specific sequence.

With reference to the first aspect or one of the first possible implementation manner to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner, the information carried in the broadcast channel includes using Cyclic redundancy check bits CRC scrambled with a specific scrambling code indicating the time period.

With reference to the fifth possible implementation of the first aspect, in a sixth possible implementation, the CRC is a CRC that is only scrambled with a specific scrambling code; or

The CRC is a CRC that has been scrambled with a scrambling code and a specific sequence used to indicate the transmitting antenna port of the base station.

Combining the first aspect or one of the first possible implementation manner to the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner, the information carried in the broadcast channel includes downlink bandwidth indication information and/or configuration information of the downlink HARQ indication channel; or

The information carried on the broadcast channel includes downlink bandwidth indication information and/or configuration information of a downlink hybrid automatic repeat indication channel, and includes system information; or

The information carried on the broadcast channel includes system information.

Combining the first aspect or one of the first possible implementation manner of the first aspect to the fourth possible implementation manner, in an eighth possible implementation manner, the information carried in the broadcast channel is null information .

With reference to the first aspect or one of the first possible implementation manner to the eighth possible implementation manner of the first aspect, in a ninth possible implementation manner, the network side device performs The information is spread-spectrum processed, including:

After performing channel coding on the original information flow, the network side device performs spread spectrum processing on the information carried on the broadcast channel before performing resource mapping on the broadcast channel;

Wherein, the original information flow refers to the information flow formed by adding CRC after the original information carried on the broadcast channel.

Combining the first aspect or one of the first possible implementation manner to the ninth possible implementation manner of the first aspect, in a tenth possible implementation manner, the network side device performs The information is spread-spectrum processed, including:

The network-side device sequentially multiplies or modulo-2 adds each information bit in the information carried on the broadcast channel with a specific sequence; or

The network-side device sequentially multiplies or modulo-2 adds the information carried on the broadcast channel to each bit in the specific sequence; or

According to the order of each subsequence in the specific sequence, the network side device performs the first product processing or the second product processing on the information carried on the broadcast channel and each subsequence; wherein, the first product processing is the information carried on the broadcast channel Each information bit in the information is sequentially multiplied or modulo 2 added to the subsequence; the second product processing is to sequentially multiply or modulo 2 add the information carried on the broadcast channel to each bit in the subsequence.

In a second aspect, a method for receiving a broadcast channel is provided, including:

The user equipment receives the broadcast channel at the starting point of the current radio frame, and detects the information carried in the broadcast channel;

The user equipment performs despreading processing on the detected information carried in the broadcast channel.

With reference to the second aspect, in a first possible implementation manner, after the user equipment receives the broadcast channel at the starting point of the current radio frame, and detects the information carried in the broadcast channel, the method further includes:

According to the corresponding relationship between the time period and the radio frame, the user equipment determines that the radio frame corresponding to the time period in which the broadcast channel is detected is the radio frame carrying the broadcast channel;

The user equipment determines the system frame number according to the radio frame carrying the broadcast channel and the time period to which the radio frame carrying the broadcast channel belongs.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner, the user equipment determines the time period to which the radio frame carrying the broadcast channel belongs according to the following manner:

According to the corresponding relationship between the time period and the specific sequence, the user equipment determines that when performing despreading processing on the information carried in the detected broadcast channel, the time period corresponding to the specific sequence used is the time to which the wireless frame carrying the broadcast channel belongs part.

With reference to the first possible implementation manner or the second possible implementation manner of the second aspect, in a third possible implementation manner, the user equipment determines the time period to which the radio frame carrying the broadcast channel belongs according to the following manner:

The user equipment determines the bearer broadcast channel according to the specific scrambling code scrambled on the cyclic redundancy check bit CRC in the information carried by the detected broadcast channel to indicate the time period of the radio frame that needs to bear the broadcast channel The time period to which the radio frame belongs.

With reference to the fourth possible implementation of the second aspect, in a fifth possible implementation, the CRC is a CRC that is scrambled only by the specific scrambling code; or the CRC is a CRC that is used to instruct the base station to transmit The scrambling code of the antenna port and the CRC of the specific sequence scrambling.

Combining the second aspect or one of the first possible implementation manner to the fourth possible implementation manner of the second aspect, in a fifth possible implementation manner, the information carried in the broadcast channel includes downlink bandwidth indication information And/or the configuration information of the downlink hybrid automatic repeat indication channel; or

The information carried on the broadcast channel includes downlink bandwidth indication information and/or configuration information of the downlink hybrid automatic repeat indication channel, and includes system information; or

The information carried on the broadcast channel includes system information.

In combination with the second aspect or the first possible implementation of the second aspect or the second possible implementation of the second aspect, in a sixth possible implementation,

No information is carried in the broadcast channel.

Combining the second aspect or one of the first possible implementation manner to the sixth possible implementation manner of the second aspect, in a seventh possible implementation manner, the user equipment performs a Perform despreading processing, including:

After performing resource demapping and before performing channel decoding, the user equipment uses a specific sequence to perform despreading processing on the information carried on the broadcast channel.

Combining the second aspect or one of the first possible implementation manner to the seventh possible implementation manner of the second aspect, in an eighth possible implementation manner, the user equipment determines to perform despreading according to the following manner Specific sequence used for video processing:

The user equipment starts from the start time of the current radio frame, and receives the broadcast channel according to the resource mapping method of the broadcast channel;

The user equipment performs a correlation operation on at least one codeword in the broadcast channel in the current receiving window and each specific sequence, and determines a correlation value corresponding to each specific sequence;

If a codeword is correlated with each specific sequence, select the specific sequence corresponding to the largest first N correlation values from the correlation values greater than the set threshold value as the specific sequence used in the despreading process, N is a positive integer; when there is no correlation value greater than the set threshold value among all the determined correlation values, the next receiving window is used as the current receiving window, and at least one codeword in the broadcast channel in the current receiving window is returned. Performing a correlation operation for each specific sequence, and determining the correlation value corresponding to each specific sequence;

If multiple codewords are correlated with each specific sequence, select the specific sequence corresponding to the first M correlation values with the largest correlation value from the correlation values greater than the set threshold value as the specific sequence used for despreading processing. Sequence, M is a positive integer; when there is no correlation value greater than the set threshold value among all the determined correlation values, the next receiving window is used as the current receiving window, and at least one of the broadcast channels in the current receiving window is returned The code word is correlated with each specific sequence, and the step of determining the correlation value corresponding to each specific sequence; wherein, a code word is respectively correlated with each specific sequence, and the obtained correlation value corresponding to each specific sequence is correlated The specific sequence with the largest value is the specific sequence with the largest primary correlation value.

With reference to one of the eighth possible implementation manners of the second aspect, in a ninth possible implementation manner, the user equipment associates a codeword in a broadcast channel within the current receiving window with a specific Sequences perform related operations, including:

The user equipment directly correlates a codeword with a specific sequence; or

The user equipment takes an information bit from each information block to form a code word according to the resource mapping method of the broadcast channel, and performs a correlation operation on the code word and each specific sequence; or

According to the order of each subsequence in a specific sequence, the user equipment performs a third correlation process or a fourth correlation process on a codeword and at least one subsequence; wherein, the third correlation process is to directly associate a codeword with at least one subsequence Correlation operation is performed on the sequence, and the fourth correlation processing is to take an information bit from each information block to form a code word according to the resource mapping method of the broadcast channel, and perform correlation operation on the code word and at least one sub-sequence.

In a third aspect, a network-side device for sending a broadcast channel is provided, including:

A determining module, configured to determine the wireless frames that need to carry the broadcast channel in the time period;

The sending module is configured to perform spread spectrum processing on the information carried in the broadcast channel, and then send the broadcast channel to the user equipment on the determined radio frame.

With reference to the third aspect, in a first possible implementation manner, the determining module is specifically configured to:

According to the correspondence between the time period and the radio frame, the radio frame corresponding to the time period is used as the radio frame that needs to carry the broadcast channel in the time period.

With reference to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner, the sending module is specifically configured to:

The specific sequence corresponding to the time period is used to perform spread spectrum processing on the information carried in the broadcast channel; wherein, each time period in the cycle corresponds to a different specific sequence.

With reference to the third aspect or the first possible implementation manner of the third aspect, in a third possible implementation manner, the sending module is specifically configured to:

performing spread spectrum processing on the information carried in the broadcast channel by using a specific sequence corresponding to the time period;

Wherein, each time period in the cycle corresponds to the same specific sequence.

Combining the third aspect or one of the first possible implementation manner of the third aspect to the third possible implementation manner, in a fourth possible implementation manner, the information carried in the broadcast channel includes using A CRC scrambled with a specific scrambling code indicating the time period.

Combining the third aspect or one of the first possible implementation manner to the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner, the sending module is specifically configured to:

After performing channel coding on the original information flow, before performing resource mapping on the broadcast channel, performing spread spectrum processing on the information carried on the broadcast channel;

Wherein, the original information flow refers to the information flow formed by adding CRC after the original information carried on the broadcast channel.

Combining the third aspect or one of the first possible implementation manner to the fifth possible implementation manner of the third aspect, in a sixth possible implementation manner, the sending module is specifically configured to:

multiplying or modulo-2 adding each information bit in the information carried on the broadcast channel with a specific sequence in turn; or

Multiply or add modulo 2 the information carried on the broadcast channel to each bit in the specified sequence in turn; or

According to the order of each subsequence in the specific sequence, the information carried on the broadcast channel and each subsequence are subjected to the first product processing or the second product processing; wherein, the first product processing is to process each of the information carried on the broadcast channel The information bits are multiplied or added modulo 2 to the subsequence in turn; the second product processing is to multiply or add modulo 2 the information carried on the broadcast channel to each bit in the subsequence in turn.

In a fourth aspect, a user equipment for receiving a broadcast channel is provided, including:

The detection module is used to receive the broadcast channel at the starting point of the current wireless frame, and detect the information carried in the broadcast channel;

The receiving module is configured to perform despreading processing on the detected information carried in the broadcast channel.

With reference to the fourth aspect, in a first possible implementation manner, the receiving module is further configured to:

According to the corresponding relationship between the time period and the wireless frame, determine that the wireless frame corresponding to the time period in which the broadcast channel is detected is the wireless frame carrying the broadcast channel; according to the time period to which the wireless frame carrying the broadcast channel and the wireless frame carrying the broadcast channel belong, determine System frame number.

With reference to the first possible implementation of the fourth aspect, in a second possible implementation, the receiving module is specifically configured to:

According to the corresponding relationship between the time period and the specific sequence, it is determined that the time period corresponding to the specific sequence used when performing despreading processing on the detected information carried in the broadcast channel is the time period to which the radio frame carrying the broadcast channel belongs.

With reference to the first possible implementation manner or the second possible implementation manner of the fourth aspect, in a third possible implementation manner, the receiving module is specifically configured to:

According to the specific scrambling code scrambled on the CRC in the information carried by the detected broadcast channel and used to indicate the time period of the radio frame that needs to carry the broadcast channel, determine the time period to which the radio frame that bears the broadcast channel belongs.

Combining the fourth aspect or one of the first possible implementation manner of the fourth aspect to the third possible implementation manner, in the fourth possible implementation manner, the receiving module is specifically configured to: perform resource After demapping and before channel decoding, a specific sequence is used to despread the information carried on the broadcast channel.

Combining the fourth aspect or one of the first possible implementation manner to the fourth possible implementation manner of the fourth aspect, in a fifth possible implementation manner, the receiving module is specifically configured to:

Starting from the starting point of the current wireless frame, the broadcast channel is received according to the resource mapping method of the broadcast channel; at least one codeword in the broadcast channel in the current receiving window is correlated with each specific sequence, and it is determined that it corresponds to each specific sequence the relevant value;

If a codeword is correlated with each specific sequence, select the specific sequence corresponding to the largest first N correlation values from the correlation values greater than the set threshold value as the specific sequence used in the despreading process, N is a positive integer; when there is no correlation value greater than the set threshold value among all the determined correlation values, the next receiving window is used as the current receiving window, and at least one codeword in the broadcast channel in the current receiving window is returned. Performing a correlation operation for each specific sequence, and determining the correlation value corresponding to each specific sequence;

If multiple codewords are correlated with each specific sequence, select the specific sequence corresponding to the first M correlation values with the largest correlation value from the correlation values greater than the set threshold value as the specific sequence used for despreading processing. Sequence, M is a positive integer; when there is no correlation value greater than the set threshold value among all the determined correlation values, the next receiving window is used as the current receiving window, and at least one of the broadcast channels in the current receiving window is returned The code word is correlated with each specific sequence, and the step of determining the correlation value corresponding to each specific sequence; wherein, a code word is respectively correlated with each specific sequence, and the obtained correlation value corresponding to each specific sequence is correlated The specific sequence with the largest value is the specific sequence with the largest primary correlation value.

With reference to the fifth possible implementation of the fourth aspect, in a sixth possible implementation, the receiving module is specifically configured to:

Directly correlate a codeword with a specific sequence; or take an information bit from each information block to form a codeword according to the resource mapping method of the broadcast channel, and correlate the codeword with each specific sequence; Or according to the order of each subsequence in a specific sequence, a codeword and at least one subsequence are subjected to the third correlation processing or the fourth correlation processing; wherein, the third correlation processing is to directly correlate a codeword with at least one subsequence Operation, the fourth correlation processing is to take one information bit from each information block to form a code word according to the resource mapping method of the broadcast channel, and perform correlation operation on the code word and at least one subsequence.

In the fifth aspect, a network-side device for sending a broadcast channel is provided, including:

The processor is configured to determine the wireless frame that needs to carry the broadcast channel in the time period, and notify the transmitter of the determined wireless frame;

The transmitter is configured to perform spread spectrum processing on the information carried in the broadcast channel, and then send the broadcast channel to the user equipment on the wireless frame notified by the processor.

With reference to the fifth aspect, in a first possible implementation manner, the processor is specifically configured to:

According to the correspondence between the time period and the radio frame, the radio frame corresponding to the time period is used as the radio frame that needs to carry the broadcast channel in the time period.

With reference to the fifth aspect or the first possible implementation manner of the fifth aspect, in a second possible implementation manner, the transmitter is specifically used for:

performing spread spectrum processing on the information carried in the broadcast channel by using a specific sequence corresponding to the time period;

Wherein, each time period in the cycle corresponds to a different specific sequence.

With reference to the fifth aspect or the first possible implementation manner of the fifth aspect, in a third possible implementation manner, the sending module is specifically configured to:

performing spread spectrum processing on the information carried in the broadcast channel by using a specific sequence corresponding to the time period;

Wherein, each time period in the cycle corresponds to the same specific sequence.

With reference to the fifth aspect, one of the first possible implementation manner to the third possible implementation manner of the fifth aspect, in a fourth possible implementation manner, the information carried in the broadcast channel includes using A CRC scrambled with a specific scrambling code indicating the time period.

Combining the fifth aspect or one of the first possible implementation manner of the fifth aspect to the fourth possible implementation manner, in a fifth possible implementation manner, the sending module is specifically configured to:

After performing channel coding on the original information flow, before performing resource mapping on the broadcast channel, performing spread spectrum processing on the information carried on the broadcast channel;

Wherein, the original information flow refers to the information flow formed by adding CRC after the original information carried on the broadcast channel.

With reference to the fifth aspect or one of the first possible implementation manner to the fifth possible implementation manner of the fifth aspect, in a sixth possible implementation manner, the sending module is specifically configured to:

multiplying or modulo-2 adding each information bit in the information carried on the broadcast channel with a specific sequence in turn; or

Multiply or add modulo 2 the information carried on the broadcast channel to each bit in the specified sequence in turn; or

According to the order of each subsequence in the specific sequence, the information carried on the broadcast channel and each subsequence are subjected to the first product processing or the second product processing; wherein, the first product processing is to process each of the information carried on the broadcast channel The information bits are multiplied or added modulo 2 to the subsequence in turn; the second product processing is to multiply or add modulo 2 the information carried on the broadcast channel to each bit in the subsequence in turn.

In a sixth aspect, a user equipment for receiving a broadcast channel is provided, including:

The processor is configured to receive the broadcast channel at the starting point of the current wireless frame, detect the information carried in the broadcast channel, and notify the receiver after the information is detected;

The receiver is configured to perform despreading processing on the detected information carried in the broadcast channel after receiving the notification from the processor.

With reference to the sixth aspect, in a first possible implementation manner, the receiver is further configured to:

According to the corresponding relationship between the time period and the wireless frame, determine that the wireless frame corresponding to the time period in which the broadcast channel is detected is the wireless frame carrying the broadcast channel; according to the time period to which the wireless frame carrying the broadcast channel and the wireless frame carrying the broadcast channel belong, determine System frame number.

With reference to the first possible implementation manner of the sixth aspect, in a second possible implementation manner, the receiving module is specifically configured to:

According to the corresponding relationship between the time period and the specific sequence, it is determined that the time period corresponding to the specific sequence used when performing despreading processing on the detected information carried in the broadcast channel is the time period to which the radio frame carrying the broadcast channel belongs.

With reference to the first possible implementation manner or the second possible implementation manner of the sixth aspect, in a third possible implementation manner, the receiving module is specifically configured to:

According to the specific scrambling code scrambled on the CRC in the information carried by the detected broadcast channel and used to indicate the time period of the radio frame that needs to carry the broadcast channel, determine the time period to which the radio frame that bears the broadcast channel belongs.

Combining the sixth aspect or one of the first possible implementation manner of the sixth aspect to the third possible implementation manner, in a fourth possible implementation manner, the receiving module is specifically configured to:

After resource demapping and before channel decoding, a specific sequence is used to despread the information carried on the broadcast channel.

Combining the sixth aspect or one of the first possible implementation manner to the fourth possible implementation manner of the sixth aspect, in a fifth possible implementation manner, the receiving module is specifically configured to:

Starting from the starting point of the current wireless frame, the broadcast channel is received according to the resource mapping method of the broadcast channel; at least one codeword in the broadcast channel in the current receiving window is correlated with each specific sequence, and it is determined that it corresponds to each specific sequence the relevant value;

If a codeword is correlated with each specific sequence, select the specific sequence corresponding to the largest first N correlation values from the correlation values greater than the set threshold value as the specific sequence used in the despreading process, N is a positive integer; when there is no correlation value greater than the set threshold value among all the determined correlation values, the next receiving window is used as the current receiving window, and at least one codeword in the broadcast channel in the current receiving window is returned. Performing a correlation operation for each specific sequence, and determining the correlation value corresponding to each specific sequence;

If multiple codewords are correlated with each specific sequence, select the specific sequence corresponding to the first M correlation values with the largest correlation value from the correlation values greater than the set threshold value as the specific sequence used for despreading processing. Sequence, M is a positive integer; when there is no correlation value greater than the set threshold value among all the determined correlation values, the next receiving window is used as the current receiving window, and at least one of the broadcast channels in the current receiving window is returned The code word is correlated with each specific sequence, and the step of determining the correlation value corresponding to each specific sequence; wherein, a code word is respectively correlated with each specific sequence, and the obtained correlation value corresponding to each specific sequence is correlated The specific sequence with the largest value is the specific sequence with the largest primary correlation value.

With reference to the fifth possible implementation manner of the sixth aspect, in a sixth possible implementation manner, the receiving module is specifically configured to:

Directly correlate a codeword with a specific sequence; or take an information bit from each information block to form a codeword according to the resource mapping method of the broadcast channel, and correlate the codeword with each specific sequence; Or according to the order of each subsequence in a specific sequence, a codeword and at least one subsequence are subjected to the third correlation processing or the fourth correlation processing; wherein, the third correlation processing is to directly correlate a codeword with at least one subsequence Operation, the fourth correlation processing is to take one information bit from each information block to form a code word according to the resource mapping method of the broadcast channel, and perform correlation operation on the code word and at least one subsequence.

In a seventh aspect, a system for receiving a broadcast channel includes:

The network side device is configured to determine the wireless frame that needs to carry the broadcast channel in the time period, and after performing spread spectrum processing on the information carried in the broadcast channel, send the broadcast channel to the user equipment on the determined wireless frame;

The user equipment is configured to receive the broadcast channel at the starting point of the current radio frame, detect the information carried in the broadcast channel, and perform despreading processing on the detected information carried in the broadcast channel.

In this embodiment of the present invention, the network-side device performs spread-spectrum processing on the information carried in the broadcast channel, and then sends the broadcast channel to the user equipment on a determined wireless frame. Since the network-side device in the embodiment of the present invention performs After the spread spectrum processing is sent, the receiving end will obtain a spreading gain, which is equivalent to increasing the received signal power at the receiving end. The transmission broadcast channel has been enhanced.

Description of drawings

FIG. 1 is a schematic diagram of a communication scene in the background technology;

FIG. 2 is a schematic flowchart of a method for transmitting a broadcast channel according to an embodiment of the present invention;

FIG. 3A is a schematic diagram of dividing time periods according to an embodiment of the present invention;

FIG. 3B is a schematic diagram of segmented resource mapping of broadcast channel data on the first predefined resource according to the embodiment of the present invention;

FIG. 3C is a schematic diagram of segmented resource mapping of broadcast channel data on the second predefined resource according to an embodiment of the present invention;

FIG. 4 is a block diagram of an embodiment of the present invention that uses spread spectrum to send a broadcast channel;

FIG. 5 is a block diagram of receiving a broadcast channel using spread spectrum according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of mapping a broadcast channel within a time period according to an embodiment of the present invention;

7 is a schematic diagram of an SFN scrambling indication through a CRC (Cyclic Redundancy Check, cyclic redundancy check bit) according to an embodiment of the present invention;

FIG. 8A is a schematic diagram of a first mapping method according to an embodiment of the present invention;

FIG. 8B is a schematic diagram of a second mapping method according to an embodiment of the present invention;

FIG. 8C is a schematic diagram of a third mapping method according to an embodiment of the present invention;

FIG. 9 is a schematic flowchart of a method for sending a broadcast channel according to an embodiment of the present invention;

FIG. 10 is a schematic flowchart of a method for receiving a broadcast channel according to an embodiment of the present invention;

FIG. 11 is a schematic flow diagram of a system for transmitting a broadcast channel according to an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a first network-side device for sending a broadcast channel according to an embodiment of the present invention;

FIG. 13 is a schematic structural diagram of a first user equipment for receiving a broadcast channel according to an embodiment of the present invention;

FIG. 14 is a schematic structural diagram of a second network-side device for sending a broadcast channel according to an embodiment of the present invention;

FIG. 15 is a schematic structural diagram of a second type of user equipment for receiving a broadcast channel according to an embodiment of the present invention.

Detailed ways

In the embodiment of the present invention, the network side device sends the broadcast channel to the user equipment on the radio frame that needs to bear the broadcast channel in at least one time period in the period, so that the user equipment determines the system frame corresponding to the radio frame in the time period that bears the broadcast channel number, where each wireless frame in each time period in the cycle corresponds to a different system frame number, and the information carried in the broadcast channel does not include the system frame number. Since the network side device in the embodiment of the present invention performs spread spectrum processing on the information carried in the broadcast channel before sending it, the receiving end will obtain a spreading gain, which is equivalent to increasing the received signal power of the receiving end. The transmission broadcast channel has been enhanced.

Wherein, the information carried in the broadcast channel in the embodiment of the present invention is different from the information carried in the existing broadcast channel and/or the resource location mapped to the existing broadcast channel is different, so the broadcast channel in the embodiment of the present invention can be used with There are different expressions of existing broadcast channels, such as xPBCH and so on. For the convenience of description, the broadcast channels appearing in the following text are all broadcast channels in the embodiments of the present invention unless otherwise specified, and no further explanation is given.

In the following description process, the implementation of the network side and the user equipment side will be described first, and finally the implementation of the network side and the user equipment side will be explained respectively, but this does not mean that the two must be implemented together. In fact, When the network side and the user equipment side are implemented separately, the problems existing on the network side and the user equipment side respectively are also solved, but when the two are used in combination, a better technical effect will be obtained.

As shown in Figure 2, the method for transmitting a broadcast channel according to an embodiment of the present invention includes the following steps:

Step 201, the network side device determines the wireless frame that needs to carry the broadcast channel in the time period;

Step 202, the network side device transmits the broadcast channel to the user equipment on the determined wireless frame after performing spread spectrum processing on the information carried in the broadcast channel;

Step 203, the user equipment receives the broadcast channel at the starting point of the current radio frame, and detects the information carried in the broadcast channel;

Step 204, the user equipment performs despreading processing on the detected information carried in the broadcast channel.

In implementation, the network-side device and the user equipment have the same understanding of the resource mapping method of the broadcast channel. For example, the resource mapping method of the broadcast channel may be specified in the protocol, or the network side may notify the user equipment of the resource mapping method of the broadcast channel. Then the network side device sends the broadcast channel to the user equipment according to the resource mapping method of the broadcast channel; correspondingly, the user equipment uses the same resource mapping method of the broadcast channel to perform detection.

In this embodiment of the present invention, all radio frames in one cycle are divided into multiple time periods, and the number of radio frames included in all time periods may be all the same, partially the same, or completely different.

Each radio frame in a period corresponds to a system frame number, and different radio frames correspond to different system frame numbers. As long as the user equipment can know the radio frame carrying the broadcast channel, the user equipment can determine the corresponding system frame number, so that the information carried in the broadcast channel does not need to include the system frame number. Since the number of bits of information carried in the broadcast channel is reduced, the transmission of the broadcast channel is enhanced.

After the user equipment detects the broadcast channel, it does not know which radio frame in which time period bears the broadcast channel. At this time, it is necessary to notify the user equipment of the time period to which the radio frame carrying the broadcast channel belongs, and then the user equipment then according to the time period The radio frame carrying the broadcast channel can be accurately determined according to the corresponding relationship between the segment and the radio frame carrying the broadcast channel.

The corresponding relationship between the time period and the radio frame carrying the broadcast channel may be pre-specified in the protocol, or notified by the network side to the user equipment.

Regarding the correspondence between the time period and the radio frame carrying the broadcast channel, a preferred manner is that the radio frames carrying the broadcast channel in each time period are the same.

For example, the sequence after spreading is mapped to a predefined resource position within a time period (that is, a radio frame carrying a broadcast channel). The predefined resource positions are within 12 consecutive radio frames starting from the third radio frame in each time period (the total number of resources required for preliminary estimation). Of course, the number of predefined resources also needs to be determined by the length of the sequence after spreading. Preferably, the number of predefined resources is not less than the length of the sequence. Preferably, the resource mapping method of the broadcast channel in a time period (128 wireless frames) is fixed, and Fig. 3A is only an embodiment of the solution of the present invention, that is, the mapping starts from the third wireless frame in each time period At the beginning of the frame, each subframe in each radio frame is sent, and in each subframe, the first 4 OFDM symbols in the second time slot are mapped, as shown in Figure 3B; it can also be used as shown in Figure 3C mode mapping; a combination of both mode mappings is also possible. It can also be mapped in each radio frame, and only mapped in one subframe in each radio frame, and the position of the subframe can be any one of 10 subframes, and the mapping in one subframe can be as shown in Figure 3B Or the manner shown in FIG. 3C , or a combination of the two manners.

There are many ways to notify the user equipment of the time period to which the radio frame carrying the broadcast channel belongs, that is, the notification may be displayed or implicitly notified.

For example, as shown in FIG. 3A , 1024 wireless frames (that is, one cycle) are divided into 8 time periods, each time period includes 128 wireless frames, and corresponds to a system frame number interval. Among them, the first time period includes 128 wireless frames, and the corresponding system frame numbers are from system frame number 0 to system frame number 127, and the fifth time period also includes 128 wireless frames, and the corresponding system frame numbers are from system Frame number 639 to system frame number 767. In this way, if the user equipment detects which frame in which time period the broadcast channel is sent, the system frame number can be determined accordingly. A broadcast channel can be sent in any one time period, or in several time periods, or in every time period. If it is sent in every time period, the number of detections performed by the user equipment before obtaining the broadcast channel is less, and the time required to obtain the broadcast channel is shorter, but more resources are occupied. If it is only sent within a period of time, since the user equipment does not know the specific location of the transmission, it will keep detecting until the broadcast channel is detected. For example, in FIG. 3A , if the broadcast channel is only sent in the first time period, the user equipment starts detection in the second time period, and it is not possible to detect the broadcast channel until the first time period of the next cycle. Therefore, in this case, the number of detection times of the user equipment is large, and it takes a long time to detect the broadcast channel. The advantage is that it does not need to be sent in every time period, and the downlink resource occupied by sending the broadcast channel is small.

Preferably, the number of wireless frames included in one cycle of the embodiment of the present invention is equal to the maximum value that can be represented by SFN. For example, in the above example, SFN ranges from 0 to 1023, and the maximum value that can be represented by SFN is 1024, then in one cycle Consists of 1024 radio frames,

At the sending end, when the network side device determines that the wireless frame in the time period that needs to carry the broadcast channel, for a time period, the network side device uses the wireless frame corresponding to the time period as the time period according to the correspondence between the time period and the wireless frame In the wireless frame that needs to carry the broadcast channel;

Correspondingly, according to the corresponding relationship between the time period and the radio frame, the user equipment determines that the radio frame corresponding to the time period in which the broadcast channel is detected is the radio frame carrying the broadcast channel; The time period to determine the system frame number.

For example, after the user equipment detects the broadcast channel, it cannot know the system frame number of the wireless frame carrying the broadcast channel. If it is determined that the radio frame carrying the broadcast channel corresponding to time period 1 is radio frame 3, then the user equipment takes the radio frame when the broadcast channel is detected as radio frame 3.

Among them, there are many ways for the user equipment to determine which time period receives the broadcast channel, some of which are listed below.

Embodiment 1. Implicit notification through a specific sequence.

The network side equipment uses the specific sequence corresponding to the time period to perform spread spectrum processing on the information carried in the broadcast channel; where each time period in the cycle corresponds to a different specific sequence, and then transmits to the user on the wireless frame that needs to carry the broadcast channel The device sends the information carried in the broadcast channel that is spread by using a specific sequence corresponding to the time period where the determined radio frame is located.

Correspondingly, according to the corresponding relationship between the time period and the specific sequence, the user equipment determines that when performing despreading processing on the information carried in the detected broadcast channel, the time period corresponding to the specific sequence used is the time period to which the wireless frame carrying the broadcast channel belongs. period.

The specific sequence here may be a spreading sequence or other specific sequences satisfying the orthogonality. For example, sequences satisfying the orthogonality include: spreading sequences, ZC sequences, and the like.

In this embodiment, each time period corresponds to a specific sequence, and different time periods correspond to different specific sequences.

For example, for the broadcast channel carried in time period 1, the network side equipment uses the specific sequence corresponding to time period 1 to spread the broadcast channel; in this way, after the user equipment uses the specific sequence to despread, according to the corresponding relationship between the time period and the specific sequence The time period corresponding to the specific sequence used for despreading can be determined, and then the time period when the broadcast channel is detected is known.

The corresponding relationship between the time period and the specific sequence may be stipulated in the protocol, or the user equipment may be notified by the network side.

Broadcast channels sent in different time periods are spread using different specific sequences, that is, the specific sequences used for spreading in each time period are orthogonal to each other. There is no limit to the spreading factor, and the spreading gain needs to be satisfied. For example, the broadcast channel needs to enhance the performance of 11~12dB. At this time, the spreading factor (the length of the specific sequence here is the spreading factor. For example, the spreading sequence is 1101 and the length is 4, then the spreading factor is 4) is at least 128. Moreover, the number of sequences that need to satisfy the orthogonality is enough to distinguish different time periods. For example, the spreading factor is 128, and 8 sequences with better mutual correlation are selected from the specific sequences with the spreading factor of 128 to distinguish broadcast channels sent in 8 time periods.

Using the spread spectrum embodiment of the present invention: On the one hand, the spread spectrum gain can be obtained to enhance the transmission of the broadcast channel; on the other hand, the system frame number can be obtained implicitly.

In practice, when the network-side device in this embodiment of the present invention transmits the broadcast channel, after performing channel coding on the original information flow and before performing resource mapping on the broadcast channel, the information carried on the broadcast channel may be spread-spectrum-processed, wherein The original information flow refers to the information flow formed by adding cyclic redundancy check bits after the original information carried on the broadcast channel.

Correspondingly, after performing resource demapping and before performing channel decoding, the user equipment uses a specific sequence to perform despreading processing on the information carried on the broadcast channel.

For example, as shown in Figure 4, spectrum spreading is performed after convolutional coding and before rate matching. Of course, Fig. 3A is just an example. Other embodiments may further include: after rate matching, spectrum spreading before modulation; after modulation, spectrum spreading before resource mapping.

Correspondingly, the position of spreading is different, and the position of despreading is also different. In FIG. 5 , the position of despreading corresponds to that of FIG. 4 , that is, after derate matching, despreading is performed before convolutional coding and decoding. Other embodiments may further include: after demodulation, despreading before rate matching; after deresource mapping, despreading before demodulation.

In Figure 4 and Figure 5, when sending and receiving in each time period, the information carried by the broadcast channel includes the downlink system bandwidth and/or configuration information including the downlink HARQ channel, but does not include the system frame number. The system frame number is obtained implicitly by the period in which the broadcast channel is detected. CRC check bits are added to the information carried by the broadcast channel, and antenna scrambling codes can be added to the CRC check bits at the same time to distinguish the transmit antenna configuration information of network-side devices. The information after the CRC check is added is encoded by a tail-biting convolutional code. The coded bit stream is spread, and the spread code used is related to the time period in which it is sent.

Among them, the specific broadcast channel resource mapping method in each time period in the embodiment of the present invention is shown in Figure 4 and Figure 5 as an example: the encoded information bit sequence (if it is placed after rate matching, it can be called is the sequence after rate matching) is c ₁ ,c ₂ ,...,c _n , and the specific sequence is k ₁ ,k ₂ ,...,k _K , where K=128, that is, if the spreading factor is 128, the length of the specific sequence here is 128. Then the sequence after spreading is c ₁ k ₁ ,c ₁ k ₂ ,...,c ₁ k _K ,c ₂ k ₁ ,c ₂ k ₂ ,. ..,c ₂ k _K ,...,c _n k ₁ ,c _n k ₂ ,...,c _n k _K , calculate the number of available resource units, and then perform rate matching on the spread sequence (if Spread spectrum occurs after rate matching, then directly enters the next step of modulation and resource mapping).

When determining the number of available resource units: FIG. 3B and FIG. 3C are resource mapping diagrams of a broadcast channel in a subframe. First determine the number of PRBs (Physical Resource Blocks) in the frequency domain, then determine the number of wireless frames that need to be occupied, then determine the number of subframes in a wireless frame that need to be occupied, and then determine the occupied symbols in each subframe The number of REs (Resource Elements) that are known to be occupied (such as REs occupied by CRC) are removed, and the remaining REs can be used to map the broadcast channel. For example, if the broadcast channel is also mapped in the 6 PRBs in the center of the carrier, occupy every radio frame, and occupy every subframe of each radio frame (excluding the first subframe, because it is already occupied by the existing broadcast channel ), and still use 4 OFDM symbols in each subframe as shown in Figure 3B and Figure 3C, then the available resource locations are the REs occupied by the broadcast channel in Figure 3B or Figure 3C (the REs occupied by the CRC are removed).

The specific sequence when mapping to resource positions is firstly in the frequency domain, then in the symbol, then in the subframe, and finally in the radio frame. From the perspective of the sequence after spreading (or the sequence after rate matching), there are three ways for the network side device in the embodiment of the present invention to perform spread spectrum processing on the information carried on the broadcast channel:

Method 1, as shown in Figure 8A:

c ₁ k ₁ ,c ₁ k ₂ ,...,c ₁ k _K ,c ₂ k ₁ ,c ₂ k ₂ ,...,c ₂ k _K ,...,c _n k ₁ ,c _n k ₂ ,...,c _n k _K .

That is, the network-side device sequentially multiplies or modulo-2 adds each information bit in the information carried on the broadcast channel by a specific sequence.

Method 2, as shown in Figure 8B:

c ₁ k ₁ ,c ₂ k ₁ ,...,c _n k ₁ ,c ₁ k ₂ ,c ₂ k ₂ ,...,c _n k ₂ ,...,c ₁ k _K ,c ₂ k _K ,...,c _n k _K

That is, the network side device sequentially multiplies or modulo-2 adds the information carried on the broadcast channel to each bit in the specific sequence.

Method 3, as shown in FIG. 8C , is a combination of the first two methods:

The network side device performs the first product processing or the second product processing on the information carried on the broadcast channel and each sub-sequence according to the order of each sub-sequence in the specific sequence; wherein, the first product processing is to convert the information carried on the broadcast channel into Each information bit of the subsequence is multiplied or added modulo 2; the second product processing is to multiply or add modulo 2 the information carried on the broadcast channel with each bit in the subsequence.

In implementation, the spreading sequence is first divided into several segments. For example, a sequence with a spreading factor of 128 can be divided into two segments. The mapping in the spreading of each segment of the spreading sequence of the information block can be either of the two shown in Fig. 8A and Fig. 8B.

Which method to use for which segment can be specified in the protocol, or the network side notifies the user equipment.

For example, divide a specific sequence into two sequences (for example, divide k ₁ , k ₂ , k ₃ ..., k ₆₄ into a sequence, divide k ₆₅ , k ₆₆ , k ₆₇ ..., k ₁₂₈ into A sequence, evenly dividing the specific sequence refers to a better method, and it can also be unevenly divided), the first sequence adopts the method shown in Figure 8A, and the second sequence adopts the method shown in Figure 8B, then the network side device will broadcast the information carried on the channel Each information bit in the information is multiplied by the first sequence in the specific sequence or added modulo 2 as the first spread information block, and the information carried on the broadcast channel is sequentially combined with the second segment in the specific sequence Each bit of the sequence is multiplied or modulo 2 added as the second spread information block; or the first sequence and the second sequence both use the method shown in Figure 8A, then the network side device will broadcast the information carried on the channel Each information bit of the specific sequence is multiplied or modulo 2 added to the first segment of the information block after spreading, and each information bit in the information carried on the broadcast channel is respectively combined with the specific sequence Multiply or modulo 2 the second segment of the sequence as the information block after the second segment of spread spectrum; or both the first segment and the second segment of the sequence use the method shown in Figure 8B, then the network side equipment will sequentially transmit the information carried on the broadcast channel Each bit of the first sequence in the specific sequence is multiplied or modulo 2 added as the first spread information block, and the information carried on the broadcast channel is sequentially combined with each bit of the second sequence in the specific sequence Bit multiplication or modulo 2 addition is used as the information block after the second spread spectrum;

For the spectrum spreading method in the embodiment of the present invention, the user equipment in the embodiment of the present invention determines the specific sequence used when performing despreading processing according to the following method:

The user equipment starts from the start time of the current radio frame, and receives the broadcast channel according to the resource mapping method of the broadcast channel;

The user equipment performs a correlation operation on at least one codeword in the broadcast channel in the current receiving window and each specific sequence, and determines a correlation value corresponding to each specific sequence;

If a codeword is correlated with each specific sequence, select the specific sequence corresponding to the largest first N correlation values from the correlation values greater than the set threshold value as the specific sequence used in the despreading process, N is a positive integer; when there is no correlation value greater than the set threshold value among all the determined correlation values, the next receiving window is used as the current receiving window, and at least one codeword in the broadcast channel in the current receiving window is returned. Performing a correlation operation for each specific sequence, and determining the correlation value corresponding to each specific sequence;

If multiple codewords are correlated with each specific sequence, select the specific sequence corresponding to the first M correlation values with the largest correlation value from the correlation values greater than the set threshold value as the specific sequence used for despreading processing. Sequence, M is a positive integer; when there is no correlation value greater than the set threshold value among all the determined correlation values, the next receiving window is used as the current receiving window, and at least one of the broadcast channels in the current receiving window is returned The code word is correlated with each specific sequence, and the step of determining the correlation value corresponding to each specific sequence; wherein, a code word is respectively correlated with each specific sequence, and the obtained correlation value corresponding to each specific sequence is correlated The specific sequence with the largest value is the specific sequence with the largest primary correlation value.

For example, there are codeword 1, codeword 2, and codeword 3, specific sequence 1, specific sequence 2, and specific sequence 3; codeword 1 is correlated with specific sequence 1, specific sequence 2, and specific sequence 3 to obtain three correlations The largest correlation value among the values is A, corresponding to the specific sequence 2; the code word 2 is correlated with the specific sequence 1, the specific sequence 2, and the specific sequence 3 respectively, and the largest correlation value among the three correlation values is B, corresponding to the specific sequence 2; codeword 3 performs correlation operations on specific sequence 1, specific sequence 2 and specific sequence 3 respectively, and obtains the largest correlation value C among the three correlation values, corresponding to specific sequence 1, then specific sequence 2 has two correlation values The largest specific sequence, specific sequence 1 is the specific sequence with the largest correlation value once.

If any of the maximum correlation values A and B corresponding to the specific sequence 2 is greater than the threshold value, the maximum correlation value C corresponding to the specific sequence 1 is greater than the threshold value; if M is 1, select the specific sequence 2 for despreading The specific sequence used in the frequency processing; if M is 2, select the specific sequence 2 and the specific sequence 1 as the specific sequence used in the despreading process.

In implementation, the user equipment may take out only one codeword and each specific sequence for correlation operation, or may take out two or more codewords and each specific sequence for correlation operation. Regardless of the number of codewords, after the correlation calculation is completed, theoretically, the sequence that exceeds the threshold or has the largest correlation value should be the same sequence. However, due to the influence of noise, it may not be possible that after the correlation between each codeword and a specific sequence is completed, the one with the largest correlation value is the same specific sequence. Therefore, it is better to correlate multiple codewords with each specific sequence: for example, take out several codewords, each codeword is correlated with each specific sequence, and the one with the largest correlation value and the largest number of occurrences is determined. The specific sequence is used as a specific sequence for despreading processing.

In implementation, when the user equipment only uses one codeword and each specific sequence for correlation calculation, if there are multiple correlation values greater than the set threshold, sort these correlation values from large to small, and select the first few The specific sequences corresponding to the correlation values form a specific sequence group, and each specific sequence in the specific sequence group is used as a candidate specific sequence for despreading processing. Or when the user equipment uses multiple codewords to perform correlation operations with each specific sequence, sort the number of times when the correlation value is the largest correlation value from large to small, and select the correlation value greater than the set threshold, and then select The specific sequences corresponding to the first several correlation values are selected to form a specific sequence group, and each specific sequence in the specific sequence group is used as a candidate specific sequence for despreading processing. The number of selections is related to the implementation complexity of the UE. The more the selections, the more complicated the implementation of the UE, but the detection accuracy of the broadcast channel is higher, which can prevent the broadcast channel from being missed. For the selected first several correlation values, although these correlation values all exceed the threshold, the transmitting end only uses a specific sequence for spreading, and the specific sequence can only be a specific sequence in the specific sequence group. The user equipment may sequentially select a specific sequence from the specific sequence group as the specific sequence used in the despreading process, and perform decoding and CRC check. If the CRC check is successful, it means that the broadcast channel has been successfully detected, and no other specific sequences in the specific sequence group are used for despreading, decoding, and CRC check; if the CRC check fails, the specific sequence group is used The order of the specific sequence in the sequence selects the next specific sequence as the specific sequence used in the despreading process, and performs decoding, and CRC check, and judges whether the CRC check is successful. This process is repeated until the CRC check succeeds.

Take Figure 6 as an example. The user equipment currently buffers data at predefined resource locations within 12 radio frames from time T1, and tries to despread, and within the receiving window starting from time T1 (the length of the receiving window here must ensure that it can be mapped within a time period All broadcast channel resources can be received) after trying all the spreading codewords (a total of 8 spreading codewords for 8 time periods), compared with the predefined threshold, it is possible that all relevant values are within the threshold In the following, it can be judged that the data in the receiving window is not the broadcast channel actually sent without trying to decode. The user equipment slides the receiving window to time T2 and tries to despread. There may be a situation where the correlation value exceeds the threshold. At this time, it can be initially judged that the broadcast channel may exist and try to decode it. If it does not pass the CRC check (due to the real The broadcast channel starts from time T3, and the information received from time T2 is not a complete broadcast channel, and some original information will be missed, so the CRC check will fail); the user equipment continues to slide the window to time T3, select The spread spectrum code word with the largest correlation value is decoded, and after the CRC check is correct, the carried information is obtained. At this time, the interval of the system frame number can be obtained from the time period corresponding to the specific sequence, and it can be determined from the T3 time that it is in this interval The third system frame, from which the specific system frame number value can be determined. If the user equipment still cannot complete the correct decoding within a time period, it may try to combine and detect broadcast channels within two time periods.

Preferably, when selecting a specific sequence, a sequence with a relatively low correlation value in the case of time misalignment may be selected as the specific sequence.

In the embodiment of the present invention, 1024 wireless frames are time-segmented, and the more time segments are divided, the more times the broadcast channel is sent. If each radio frame is used to send the broadcast channel, the solution of the embodiment of the present invention needs to go through at most 12 detections. More importantly, the scheme of the embodiment of the present invention first despreads and compares it with the threshold every time it detects, and if it is lower than the threshold, it is considered that there is no broadcast channel. If it is higher than the threshold, it will be further decoded and CRC checked. Through the limitation of the threshold, it can be avoided that the CRC check must be completed for each detection, thereby reducing the complexity of user equipment detection.

There are three ways for the network side equipment to perform spread spectrum processing on the information carried on the broadcast channel. When the user equipment correlates at least one codeword in the broadcast channel in the current receiving window with each specific sequence, there are also three corresponding ways. .

In the following, a correlation operation between a codeword and a specific sequence is taken as an example for illustration.

For the first method, the user equipment directly performs a correlation operation between a codeword and a specific sequence.

Take Figure 4 as an example. For example, if the original information bit is 1, and the specific sequence is 1101, then the network-side equipment will be 1101 after spectrum spreading. The combination of these 4 bits is called a codeword.

Then, when despreading at the receiving end, the user equipment needs to add the codeword and the spreading sequence modulo 2. That is to say, the code word 1101 and the spreading sequence 1101 are added modulo 2, and then summed, the result is 4, that is, the correlation value is 4.

There are two specific implementation methods of spectrum spreading in the embodiment of the present invention: if the modulated symbols are spread, then the original information symbols are multiplied by the spread spectrum sequence, and the information bits refer to the modulated symbols. If the information bits before modulation are spread, then the original information bits and the spread spectrum sequence are subjected to a modulo 2 addition operation, and the information bits refer to the information bits.

Since Fig. 4 spreads the information bits before modulation, the example here is the modulo 2 addition operation, which does not mean that the embodiment of the present invention can only use the modulo 2 addition operation.

In this way, as shown in Figure 7, the user equipment can judge whether it needs to further detect the broadcast channel in the receiving window by the first codeword after spectrum spreading: the first codeword after spectrum spreading and the local The spread spectrum sequence is used for correlation calculation and compared with the threshold. If it does not exceed the threshold, continue to slide the receiving window for the next attempt to detect. If it exceeds the threshold, try decoding and CRC check.

For the second method, the user equipment takes out one information bit from each information block to form a code word according to the resource mapping method of the broadcast channel, and performs a correlation operation between the code word and each specific sequence.

For example, the original information bit is 101, and the spreading sequence is 1101. The spreading process is to perform modulo 2 addition operation on the original information bit and each bit of the spreading sequence. The information blocks formed after spreading are 101, 101, 010, 101. During resource mapping, the transmitting end maps in sequence according to the bit sequence of the information block (or the symbol modulated on the information block). The receiving end obtains the information blocks formed after spreading according to the resource mapping method of the broadcast channel, and extracts the corresponding bits in each information block to form a code word, and performs a correlation operation between the code word and each specific sequence.

For example, extracting the corresponding first bit in each information block can form a codeword 1101; extracting the corresponding second bit in each information block can form a codeword 0010; extracting the corresponding first bit in each information block Three bits come out to form a codeword 1101.

In this way, the user equipment needs to select a corresponding bit from each information block to form a codeword, which means that the same information bit is spread by a spreading sequence, and then correlated with the local spreading sequence Calculate, and then compare with the threshold, if it does not exceed the threshold, continue to slide the receiving window for the next attempt to detect, if it exceeds the threshold, try decoding and CRC check. The advantage of this mapping method is that the user equipment can be detected by the first m information blocks that have been spread by m spreading bits. It is not necessary to collect all the information blocks before despreading and translating. Code, CRC check.

For mode 3, the user equipment performs the third correlation processing or the fourth correlation processing on a codeword and at least one subsequence according to the order of each subsequence in a specific sequence; wherein, the third correlation processing is to directly compare a codeword with at least one subsequence One sub-sequence performs correlation operation, and the fourth correlation processing is to take one information bit from each information block to form a code word according to the resource mapping method of the broadcast channel, and perform correlation operation on the code word and at least one sub-sequence.

For the third way, the user equipment may use all subsequences of the specific sequence, or may use part of the subsequences. If all subsequences are used, since all subsequences are used, the spreading factor is large, so a higher spreading gain can be obtained, but the calculation amount is relatively large. On the contrary, part of the subsequences, the spreading factor is small, and the obtained spreading gain is also limited, but the amount of calculation is relatively small, so you can choose a subsequence with a large or small spreading factor according to your needs.

Embodiment 2: Implicit notification through a specific sequence.

In the first embodiment, the information carried on the broadcast channel includes the downlink system bandwidth and/or the configuration information of the downlink HARQ channel, but does not include the system frame number. In Embodiment 2, the information carried on the broadcast channel includes downlink bandwidth indication information and/or configuration information of the downlink hybrid automatic repeat indication channel, and includes system information; or

the information carried on the broadcast channel includes system information; or

The broadcast channel does not carry any information, that is, the information carried in the broadcast channel is empty information.

In the current LTE system, the system information is the information scheduled on the PDSCH (Physical Downlink Shared Channel, physical downlink shared channel) after the user equipment obtains the broadcast channel. The user equipment needs to detect the downlink control channel PDCCH or the enhanced downlink control channel EPDCCH, then obtain the scheduling information of the PDSCH, and then detect the system information on the PDSCH. System information is equivalent to a container, which can carry SIB (System Information Block, system information block) with different scheduling periods. The current LTE system can support SIB1 to SIB12. But for some user equipment, such as super user equipment (the super user equipment here is the equipment that needs to work in the environment with enhanced coverage, due to the enhanced coverage of the embodiment of the present invention, all user equipment in the embodiment of the present invention can be in the basement work in an environment that requires coverage enhancement, which is "more capable" than ordinary user equipment, so it is named "super user equipment" in this article), may only need SIB1, SIB2, and some bits in these two SIBs The indicated information is also unnecessary for some user equipments. Therefore, bits in SIB1 and SIB2 or other possibly required SIB information may be integrated and carried by the broadcast channel, or carried together with information originally carried in the broadcast channel.

The difference between the second embodiment and the first embodiment is that, in the two embodiments, the number of bits of information carried by the physical channel has changed. The size of the required spreading factor may be different, and the amount of resource data that needs to be mapped in a period of time becomes more in the second embodiment. Alternatively, it is also possible that the number of time segments divided into 1024 radio frames becomes smaller, and the number of radio frames included in one time segment becomes larger.

The other processing procedures of the second embodiment are the same as those of the first embodiment, and will not be repeated here.

Embodiment 3: The scrambling code of the CRC implicitly notifies, that is, the information carried in the broadcast channel includes a CRC scrambled with a specific scrambling code used to indicate the time period of the radio frame that needs to carry the broadcast channel.

The network side device puts the CRC scrambled with a specific scrambling code used to indicate the time period of the radio frame that needs to carry the broadcast channel into the information carried in the broadcast channel, and sends it to the user equipment on the radio frame that needs to carry the broadcast channel.

Correspondingly, according to the specific scrambling code scrambled on the CRC in the information carried by the detected broadcast channel to indicate the time period in which the radio frame that needs to carry the broadcast channel is located, the user equipment determines that the radio frame carrying the broadcast channel belongs to time period.

Wherein, the CRC in the information carried in the broadcast channel is obtained by scrambling the original CRC.

The original CRC is calculated from the information carried in the broadcast channel.

In implementation, the network side device can only use a specific scrambling code to scramble the original CRC to obtain the CRC in the information carried in the broadcast channel;

The network side device may also use a specific scrambling code and a scrambling code used to indicate the base station transmit antenna port to scramble the original CRC to obtain the CRC in the information carried in the broadcast channel. The specific scrambling code and the scrambling sequence of the scrambling code used to indicate the base station transmit antenna port can be used as required, and the original CRC can be scrambled first with a specific scramble code, and then scrambled with the scramble code used to indicate the base station transmit antenna port; The original CRC may also be first scrambled with a scrambling code used to indicate the base station transmit antenna port, and then scrambled with a specific scrambling code.

In addition to the CRC, the information carried on the broadcast channel in Embodiment 3 may also include:

The information carried on the broadcast channel includes downlink bandwidth indication information and/or configuration information of the downlink HARQ indication channel; or

The information carried on the broadcast channel includes downlink bandwidth indication information and/or configuration information of the downlink hybrid automatic repeat indication channel, and includes system information; or

The information carried on the broadcast channel includes system information.

In this embodiment, each time period corresponds to a scrambling code, and different time periods correspond to different scrambling codes.

For example, for the broadcast channel that needs to be sent in time period 1, the network-side device includes the CRC scrambled with the scrambling code corresponding to time period 1 in the information carried by the broadcast channel; in this way, after the user equipment descrambles the CRC with the scrambling code, according to The corresponding relationship between the time period and the scrambling code can determine the time period corresponding to the scrambling code that scrambles the CRC, and then know which time period the broadcast channel is detected.

The corresponding relationship between the time period and the scrambling code can be specified in the protocol, or can be notified by the network side to the user equipment.

Taking FIG. 7 as an example, 1024 radio frames are divided into several time segments, for example, still divided into 8 time segments. The broadcast channel can be sent in any one of the eight or several time periods. When sent at different times, the CRC will be scrambled with different scrambling codes. The original information bit sequence carried by the broadcast channel is a ₀ , a ₁ , a ₂ ...,a _A-1 , where A is the length of information bits, for example, the original information carried by the broadcast channel only contains 3-bit downlink bandwidth indication, 3 When the downlink hybrid automatic retransmission indicates channel configuration information and 10 idle bits, then A=16, CRC check bits p ₀ , p ₁ , p ₂ , p ₃ , will be added after the original information bit sequence. ..,p _L-1 , for example, L=16 when adding a 16-bit CRC sequence, the CRC will be used to indicate the scrambling of the time segment scrambling code, for example, it will be added to the CRC of the PBCH sent in the first time segment The scrambling code for scrambling is the scrambling code corresponding to time number 0 in Table 1.

The process of adding scrambling codes is: c _k =(p _k +x _t,k )mod2,t=0,1,...,7; k=0,1,...,L-1.

In the current LTE standard, CRC has been used to indicate the scrambling code of the antenna port for scrambling. In Embodiment 3, the CRC may not be scrambled by the scrambling code of the indicated antenna port, or may be scrambled by the scrambling code of the indicated time period again on the basis that the CRC is scrambled by the scrambling code of the indicated antenna port. Of course, the CRC scrambling code here is just an example. The principle is to select a specific scrambling code corresponding to each time period, and try to ensure that the distance between different scrambling codes is as large as possible (the distance between scrambling codes The distance between two scrambling codes refers to the number of different bits corresponding to the two scrambling codes. For example, scrambling code 1 is 0000, and scrambling code 2 is 1111, so the distance between the two scrambling codes is 4).

time slot number CRC scrambling code for broadcast channel

<xt _,0 ,xt _,1 ,xt _,2 ,...,xt _,15 > 0 <0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0> 1 <0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1> 2 <1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0> 3 <0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1> 4 <1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0> 5 <0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1> 6 <1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0> 7 <1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1>

Table 1: CRC scrambling codes for broadcast channels.

Preferably, in the third implementation, an enhanced sending mode can be used when sending the broadcast channel in each time period. The resources available when performing rate matching can be allocated within 1 time period (such as 128 radio frames).

Because spread spectrum is used in a period of time, despreading will have spread spectrum gain, so coverage can be enhanced in a period of time.

For implementation three, since the user equipment does not know the specific location of the broadcast channel, it will still detect according to the preset resource mapping method of the broadcast channel, and will also try all possible scrambling codes for scrambling the CRC until the CRC check is correct.

In practice, the third embodiment can be combined with the first embodiment and/or the second embodiment and the third embodiment. That is, while adopting the spread spectrum transmission and reception method, the CRC including the scrambling code scrambling corresponding to the time period is adopted, which can be used as a double check, so that the user equipment can obtain correct information.

Of course, for the third embodiment, it may not be combined with other embodiments, so that the specific sequence using spread spectrum processing may be a specific sequence corresponding to each time period, and the specific sequences corresponding to each time period may be all the same, or They may be partially the same, or completely different.

For example, the network side device uses the specific sequence corresponding to the time period to perform spread spectrum processing on the information carried in the broadcast channel; wherein, each time period in the cycle corresponds to the same specific sequence.

In Embodiment 3, the manner in which the network side equipment performs spectrum spreading processing and the user equipment performs spectrum despreading processing is the same as that in Embodiment 1, and will not be repeated here.

For the third embodiment above, a preferred way is: if the same specific sequence is used for spreading in each time period, for example, the spreading factor is 128, then the spreading sequence can be a bit sequence with 128 bits all being 1 . When the bit sequence is used for spreading, it is equivalent to repeatedly mapping the sequence before spreading.

For example, the original information bit is 101, and the spreading sequence is 1111, then after spreading it is:

101101101101, which is equivalent to performing repeated mapping or sending on the original information sequence 101 4 times.

In the first to third embodiments above, the less information is carried in the broadcast channel, the more times it can be sent per unit time. In this way, the number of times of sending can be increased without increasing resources, thereby improving the user experience. The probability that the device correctly receives the broadcast channel.

Wherein, the network-side device in the embodiment of the present invention may be a base station (such as a macro base station, a home base station, etc.), may also be an RN (relay) device, or may be other network-side devices.

As shown in Figure 9, the method for sending a broadcast channel in the embodiment of the present invention includes the following steps:

Step 901, the network side device determines the wireless frame that needs to carry the broadcast channel in the time period;

In step 902, the network side device transmits the broadcast channel to the user equipment on the determined wireless frame after performing spread spectrum processing on the information carried in the broadcast channel.

In step 901, for a time period, the network side device uses the radio frame corresponding to the time period as the radio frame that needs to carry the broadcast channel in the time period according to the correspondence between the time period and the radio frame.

In implementation, the network side device also needs to notify the user equipment of the time period of the wireless frame that needs to carry the broadcast channel. There are many specific notification methods, and the following are listed:

Method 1: Notify through a specific sequence.

The network side device uses a specific sequence corresponding to the time period to perform spread spectrum processing on the information carried in the broadcast channel;

Wherein, each time period in the cycle corresponds to a different specific sequence.

Preferably, the specific sequences corresponding to each time period in the period are orthogonal to each other.

Method 2: Notify through CRC.

The information carried in the broadcast channel includes a CRC scrambled with a specific scrambling code used to indicate the time period in which the radio frame that needs to carry the broadcast channel is located.

Preferably, the CRC is a CRC that has only been scrambled with a specific scrambling code; or

The CRC is a CRC scrambled with a scrambling code and a specific sequence used to indicate the transmitting antenna port of the base station.

For mode 1 and mode 2, preferably, the information carried in the broadcast channel includes downlink bandwidth indication information and/or configuration information of downlink hybrid automatic repeat transmission indication channel; or

The information carried on the broadcast channel includes downlink bandwidth indication information and/or configuration information of the downlink hybrid automatic repeat indication channel, and includes system information; or

The information carried on the broadcast channel includes system information.

For way one, preferably, the broadcast channel does not carry any information.

Preferably, when the network-side device sends the broadcast channel to the user equipment on the determined wireless frame, the network-side device performs channel coding on the original information flow and before performing resource mapping on the broadcast channel, the information carried on the broadcast channel Perform spread spectrum processing.

Wherein, the original information flow refers to the information flow formed by adding CRC after the original information carried on the broadcast channel.

Preferably, when the network-side device performs spread-spectrum processing on the information carried on the broadcast channel, the network-side device sequentially multiplies or modulo-2 adds each information bit in the information carried on the broadcast channel with a specific sequence; or

The network-side device sequentially multiplies or modulo-2 adds the information carried on the broadcast channel to each bit in the specific sequence; or

The network side device performs the first product processing or the second product processing on the information carried on the broadcast channel and each sub-sequence according to the order of each sub-sequence in the specific sequence; wherein, the first product processing is to convert the information carried on the broadcast channel into Each information bit of the subsequence is multiplied or added modulo 2 in turn; the second product processing is to multiply or add modulo 2 the information carried on the broadcast channel with each bit in the subsequence in turn.

For the second method, preferably, the network side device uses the specific sequence corresponding to the time period to perform spread spectrum processing on the information carried in the broadcast channel; wherein, each time period in the cycle corresponds to the same specific sequence.

As shown in Figure 10, the method for receiving a broadcast channel in the embodiment of the present invention includes the following steps:

Step 1010, the user equipment receives the broadcast channel at the starting point of the current radio frame, and detects the information carried in the broadcast channel;

Step 1011, the user equipment performs despreading processing on the detected information carried in the broadcast channel.

Preferably, the user equipment receives the broadcast channel at the starting point of the current radio frame, and after detecting the information carried in the broadcast channel, it can also determine the corresponding time period when the broadcast channel is detected according to the correspondence between the time period and the radio frame. The wireless frame is the wireless frame bearing the broadcast channel; the system frame number is determined according to the wireless frame bearing the broadcast channel and the time period to which the wireless frame bearing the broadcast channel belongs.

Among them, there are many ways for the user equipment to determine the time period to which the radio frame carrying the broadcast channel belongs, some of which are listed below:

Method 1: Determine through a specific sequence.

According to the corresponding relationship between the time period and the specific sequence, the user equipment determines that when performing despreading processing on the information carried in the detected broadcast channel, the time period corresponding to the specific sequence used is the time period to which the radio frame carrying the broadcast channel belongs.

Method 2: Determine through CRC.

The user equipment determines the time period to which the radio frame carrying the broadcast channel belongs according to the specific scrambling code scrambled on the CRC in the detected information carried by the broadcast channel to indicate the time period of the radio frame that needs to carry the broadcast channel .

Preferably, the CRC is a CRC that has only been scrambled with a specific scrambling code; or

The CRC is a CRC scrambled with a scrambling code and a specific sequence used to indicate the transmitting antenna port of the base station.

For mode 1 and mode 2, preferably, the information carried in the broadcast channel includes downlink bandwidth indication information and/or configuration information of downlink hybrid automatic repeat transmission indication channel; or

The information carried on the broadcast channel includes downlink bandwidth indication information and/or configuration information of the downlink hybrid automatic repeat indication channel, and includes system information; or

The information carried on the broadcast channel includes system information.

For way one, preferably, the broadcast channel does not carry any information.

Preferably, the user equipment performs despreading processing on the information carried on the broadcast channel, which also includes:

After performing resource demapping and before performing channel decoding, the user equipment uses a specific sequence to perform despreading processing on the information carried on the broadcast channel.

Preferably, the user equipment determines the specific sequence used when performing despreading processing according to the following method:

The user equipment starts from the start time of the current radio frame, and receives the broadcast channel according to the resource mapping method of the broadcast channel;

The user equipment performs a correlation operation on at least one codeword in the broadcast channel in the current receiving window and each specific sequence, and determines a correlation value corresponding to each specific sequence;

If a codeword is correlated with each specific sequence, select the specific sequence corresponding to the largest first N correlation values from the correlation values greater than the set threshold value as the specific sequence used in the despreading process, N is a positive integer; when there is no correlation value greater than the set threshold value among all the determined correlation values, the next receiving window is used as the current receiving window, and at least one codeword in the broadcast channel in the current receiving window is returned. Performing a correlation operation for each specific sequence, and determining the correlation value corresponding to each specific sequence;

If multiple codewords are correlated with each specific sequence, select the specific sequence corresponding to the first M correlation values with the largest correlation value from the correlation values greater than the set threshold value as the specific sequence used for despreading processing. Sequence, M is a positive integer; when there is no correlation value greater than the set threshold value among all the determined correlation values, the next receiving window is used as the current receiving window, and at least one of the broadcast channels in the current receiving window is returned The code word is correlated with each specific sequence, and the step of determining the correlation value corresponding to each specific sequence; wherein, a code word is respectively correlated with each specific sequence, and the obtained correlation value corresponding to each specific sequence is correlated The specific sequence with the largest value is the specific sequence with the largest primary correlation value.

Optionally, when the user equipment only uses one codeword and each specific sequence for correlation calculation, if there are multiple correlation values greater than the set threshold, sort these correlation values in order from large to small, and select the first few The specific sequences corresponding to the correlation values form a specific sequence group, and each specific sequence in the specific sequence group is used as a candidate specific sequence for despreading processing. Or when the user equipment uses multiple codewords to perform correlation operations with each specific sequence, sort the number of times when the correlation value is the largest correlation value from large to small, and select the correlation value greater than the set threshold, and then select The specific sequences corresponding to the first several correlation values are selected to form a specific sequence group, and each specific sequence in the specific sequence group is used as a candidate specific sequence for despreading processing. The number of selections is related to the implementation complexity of the UE. The more the selections, the more complicated the implementation of the UE, but the detection accuracy of the broadcast channel is higher, which can prevent the broadcast channel from being missed. For the selected first several correlation values, although these correlation values all exceed the threshold, the transmitting end only uses a specific sequence for spreading, and the specific sequence can only be a specific sequence in the specific sequence group. The user equipment may sequentially select a specific sequence from the specific sequence group as the specific sequence used in the despreading process, and perform decoding and CRC check. If the CRC check is successful, it means that the broadcast channel has been successfully detected, and no other specific sequences in the specific sequence group are used for despreading, decoding, and CRC check; if the CRC check fails, the specific sequence group is used The order of the specific sequence in the sequence selects the next specific sequence as the specific sequence used in the despreading process, and performs decoding, and CRC check, and judges whether the CRC check is successful. This process is repeated until the CRC check succeeds.

Preferably, the user equipment correlates a codeword in the broadcast channel within the current receiving window with a specific sequence according to the following methods, including:

The UE directly correlates a codeword with a specific sequence; or

According to the resource mapping method of the broadcast channel, the user equipment takes an information bit from each information block to form a code word, and performs a correlation operation between the code word and each specific sequence; or

According to the order of each subsequence in a specific sequence, the user equipment performs a third correlation process or a fourth correlation process on a codeword and at least one subsequence; wherein, the third correlation process is to directly perform a codeword with at least one subsequence Correlation operation, the fourth correlation processing is to take one information bit from each information block to form a code word according to the resource mapping method of the broadcast channel, and perform correlation operation on the code word and at least one subsequence.

Based on the same inventive concept, embodiments of the present invention also provide a system for transmitting broadcast channels, network-side equipment, and user equipment. Since they have similar principles to the method in the embodiment of the present invention, the implementation of these devices can be referred to in the method. implementation, the repetition will not be repeated.

As shown in FIG. 11 , the system for transmitting a broadcast channel according to the embodiment of the present invention includes: a network side device 1100 and a user equipment 1110 .

The network side device 1100 is configured to determine the wireless frame that needs to carry the broadcast channel in the time period; after performing spread spectrum processing on the information carried in the broadcast channel, send the broadcast channel to the user equipment on the determined wireless frame;

The user equipment 1110 is configured to receive the broadcast channel at the starting point of the current radio frame, detect the information carried in the broadcast channel, and perform despreading processing on the detected information carried in the broadcast channel.

As shown in FIG. 12 , the first network-side device for sending a broadcast channel in the embodiment of the present invention includes: a determining module 1210 and a sending module 1220 .

A determining module 1210, configured to determine the radio frames that need to carry the broadcast channel in the time period;

The sending module 1220 is configured to send the broadcast channel to the user equipment on the determined radio frame after performing spread spectrum processing on the information carried in the broadcast channel.

Preferably, the determining module 1210 is specifically used for:

For a time period, according to the correspondence between the time period and the radio frame, the radio frame corresponding to the time period is used as the radio frame that needs to carry the broadcast channel in the time period.

Preferably, the sending module 1220 is specifically used for:

performing spread spectrum processing on the information carried in the broadcast channel by using a specific sequence corresponding to the time period;

Wherein, each time period in the cycle corresponds to a different specific sequence.

Preferably, the sending module 1220 is specifically used for:

performing spread spectrum processing on the information carried in the broadcast channel by using a specific sequence corresponding to the time period;

Wherein, each time period in the cycle corresponds to the same specific sequence.

Preferably, the information carried in the broadcast channel includes a CRC scrambled with a specific scrambling code used to indicate the time period of the radio frame that needs to carry the broadcast channel.

Preferably, the sending module 1220 is specifically used for:

After performing channel coding on the original information flow, before performing resource mapping on the broadcast channel, performing spread spectrum processing on the information carried on the broadcast channel;

Wherein, the original information flow refers to the information flow formed by adding CRC after the original information carried on the broadcast channel.

Preferably, the sending module 1220 is specifically used for:

multiplying or modulo-2 adding each information bit in the information carried on the broadcast channel with a specific sequence in turn; or

Multiply or add modulo 2 the information carried on the broadcast channel to each bit in the specified sequence in turn; or

According to the order of each subsequence in the specific sequence, the information carried on the broadcast channel and each subsequence are subjected to the first product processing or the second product processing; wherein, the first product processing is to process each of the information carried on the broadcast channel The information bits are multiplied or added modulo 2 to the subsequence in turn; the second product processing is to multiply or add modulo 2 the information carried on the broadcast channel to each bit in the subsequence in turn.

As shown in FIG. 13 , the first type of user equipment for receiving a broadcast channel in the embodiment of the present invention includes: a detection module 1310 and a receiving module 1320 .

The detection module 1310 is configured to receive the broadcast channel at the starting point of the current wireless frame, and detect the information carried in the broadcast channel;

The receiving module 1320 is configured to perform despreading processing on the detected information carried in the broadcast channel.

Preferably, the receiving module 1320 is also used for:

According to the corresponding relationship between the time period and the wireless frame, determine that the wireless frame corresponding to the time period in which the broadcast channel is detected is the wireless frame carrying the broadcast channel; according to the time period to which the wireless frame carrying the broadcast channel and the wireless frame carrying the broadcast channel belong, determine System frame number.

Preferably, the receiving module 1320 is specifically used for:

According to the corresponding relationship between the time period and the specific sequence, it is determined that the time period corresponding to the specific sequence used when performing despreading processing on the detected information carried in the broadcast channel is the time period to which the radio frame carrying the broadcast channel belongs.

Preferably, the receiving module 1320 is specifically used for:

According to the specific scrambling code scrambled on the CRC in the information carried by the detected broadcast channel and used to indicate the time period of the radio frame that needs to carry the broadcast channel, determine the time period to which the radio frame that bears the broadcast channel belongs.

Preferably, the receiving module 1320 is also used for:

After resource demapping and before channel decoding, a specific sequence is used to despread the information carried on the broadcast channel.

Preferably, the receiving module 1320 is also used for:

Starting from the starting point of the current wireless frame, the broadcast channel is received according to the resource mapping method of the broadcast channel; at least one codeword in the broadcast channel in the current receiving window is correlated with each specific sequence, and it is determined that it corresponds to each specific sequence the relevant value;

If a codeword is correlated with each specific sequence, select the specific sequence corresponding to the largest first N correlation values from the correlation values greater than the set threshold value as the specific sequence used in the despreading process, N is a positive integer; when there is no correlation value greater than the set threshold value among all the determined correlation values, the next receiving window is used as the current receiving window, and at least one codeword in the broadcast channel in the current receiving window is returned. Performing a correlation operation for each specific sequence, and determining the correlation value corresponding to each specific sequence;

If multiple codewords are correlated with each specific sequence, select the specific sequence corresponding to the first M correlation values with the largest correlation value from the correlation values greater than the set threshold value as the specific sequence used for despreading processing. Sequence, M is a positive integer; when there is no correlation value greater than the set threshold value among all the determined correlation values, the next receiving window is used as the current receiving window, and at least one of the broadcast channels in the current receiving window is returned The code word is correlated with each specific sequence, and the step of determining the correlation value corresponding to each specific sequence; wherein, a code word is respectively correlated with each specific sequence, and the obtained correlation value corresponding to each specific sequence is correlated The specific sequence with the largest value is the specific sequence with the largest primary correlation value.

Optionally, when the user equipment only uses one codeword and each specific sequence for correlation calculation, if there are multiple correlation values greater than the set threshold, sort these correlation values in order from large to small, and select the first few The specific sequences corresponding to the correlation values form a specific sequence group, and each specific sequence in the specific sequence group is used as a candidate specific sequence for despreading processing. Or when the user equipment uses multiple codewords to perform correlation operations with each specific sequence, sort the number of times when the correlation value is the largest correlation value from large to small, and select the correlation value greater than the set threshold, and then select The specific sequences corresponding to the first several correlation values are selected to form a specific sequence group, and each specific sequence in the specific sequence group is used as a candidate specific sequence for despreading processing. The number of selections is related to the implementation complexity of the UE. The more the selections, the more complicated the implementation of the UE, but the detection accuracy of the broadcast channel is higher, which can prevent the broadcast channel from being missed. For the selected first several correlation values, although these correlation values all exceed the threshold, the transmitting end only uses a specific sequence for spreading, and the specific sequence can only be a specific sequence in the specific sequence group. The user equipment may sequentially select a specific sequence from the specific sequence group as the specific sequence used in the despreading process, and perform decoding and CRC check. If the CRC check is successful, it means that the broadcast channel has been successfully detected, and no other specific sequences in the specific sequence group are used for despreading, decoding, and CRC check; if the CRC check fails, the specific sequence group is used The order of the specific sequence in the sequence selects the next specific sequence as the specific sequence used in the despreading process, and performs decoding, and CRC check, and judges whether the CRC check is successful. This process is repeated until the CRC check succeeds.

Preferably, the receiving module 1320 is specifically used for:

Directly correlate a codeword with a specific sequence; or take an information bit from each information block to form a codeword according to the resource mapping method of the broadcast channel, and correlate the codeword with each specific sequence; Or according to the order of each subsequence in a specific sequence, a codeword and at least one subsequence are subjected to the third correlation processing or the fourth correlation processing; wherein, the third correlation processing is to directly correlate a codeword with at least one subsequence Operation, the fourth correlation processing is to take one information bit from each information block to form a code word according to the resource mapping method of the broadcast channel, and perform correlation operation on the code word and at least one subsequence.

As shown in FIG. 14 , the second network-side device for sending a broadcast channel in the embodiment of the present invention includes: a processor 1410 and a transmitter 1420 .

The processor 1410 is configured to determine the radio frame that needs to carry the broadcast channel in the time period, and notify the transmitter 1420 of the determined radio frame;

The transmitter 1420 is configured to transmit the broadcast channel to the user equipment on the radio frame notified by the processor 1410 after performing spread spectrum processing on the information carried in the broadcast channel.

Preferably, the processor 1410 is also used for:

For a time period, according to the correspondence between the time period and the radio frame, the radio frame corresponding to the time period is used as the radio frame that needs to carry the broadcast channel in the time period.

Preferably, the transmitter 1420 is specifically used for:

The specific sequence corresponding to the time period is used to perform spread spectrum processing on the information carried in the broadcast channel, and on the wireless frame notified by the processor 1410, the specific sequence corresponding to the determined time period of the wireless frame is sent to the user equipment after spreading The information carried in the broadcast channel;

Wherein, each time period in the cycle corresponds to a different specific sequence.

Preferably, the transmitter 1420 is specifically used for:

Spread spectrum processing is performed on the information carried in the broadcast channel by using a specific sequence corresponding to the time period;

Wherein, each time period in the cycle corresponds to the same specific sequence.

Preferably, the information carried in the broadcast channel includes a CRC scrambled with a specific scrambling code used to indicate the time period of the radio frame that needs to carry the broadcast channel.

Preferably, the transmitter 1420 is specifically used for:

After performing channel coding on the original information flow, before performing resource mapping on the broadcast channel, performing spread spectrum processing on the information carried on the broadcast channel;

Wherein, the original information flow refers to the information flow formed by adding CRC after the original information carried on the broadcast channel.

Preferably, the transmitter 1420 is specifically used for:

multiplying or modulo-2 adding each information bit in the information carried on the broadcast channel with a specific sequence in turn; or

Multiply or add modulo 2 the information carried on the broadcast channel to each bit in the specified sequence in turn; or

According to the order of each subsequence in the specific sequence, the information carried on the broadcast channel and each subsequence are subjected to the first product processing or the second product processing; wherein, the first product processing is to process each of the information carried on the broadcast channel The information bits are multiplied or added modulo 2 to the subsequence in turn; the second product processing is to multiply or add modulo 2 the information carried on the broadcast channel to each bit in the subsequence in turn.

As shown in Figure 15, the second type of user equipment for receiving broadcast channels in the embodiment of the present invention includes:

The processor 1510 is configured to receive the broadcast channel at the starting point of the current wireless frame, detect the information carried in the broadcast channel, and notify the receiver 1520 after the information is detected;

The receiver 1520 is configured to perform despreading processing on the detected information carried in the broadcast channel after receiving the notification from the processor 1510 .

Preferably, the receiver 1520 is specifically used for:

According to the corresponding relationship between the time period and the wireless frame, determine that the wireless frame corresponding to the time period in which the broadcast channel is detected is the wireless frame carrying the broadcast channel; according to the time period to which the wireless frame carrying the broadcast channel and the wireless frame carrying the broadcast channel belong, determine System frame number.

Preferably, the receiver 1520 is specifically used for:

According to the corresponding relationship between the time period and the specific sequence, it is determined that the time period corresponding to the specific sequence used when performing despreading processing on the detected information carried in the broadcast channel is the time period to which the radio frame carrying the broadcast channel belongs.

Preferably, the receiver 1520 is specifically used for:

According to the specific scrambling code scrambled on the CRC in the information carried by the detected broadcast channel and used to indicate the time period of the radio frame that needs to carry the broadcast channel, determine the time period to which the radio frame that bears the broadcast channel belongs.

Preferably, the receiver 1520 is also used for:

After resource demapping and before channel decoding, a specific sequence is used to despread the information carried on the broadcast channel.

Preferably, the receiver 1520 is also used for:

Starting from the starting point of the current wireless frame, the broadcast channel is received according to the resource mapping method of the broadcast channel; at least one codeword in the broadcast channel in the current receiving window is correlated with each specific sequence, and it is determined that it corresponds to each specific sequence the relevant value;

If a codeword is correlated with each specific sequence, select the specific sequence corresponding to the largest first N correlation values from the correlation values greater than the set threshold value as the specific sequence used in the despreading process, N is a positive integer; when there is no correlation value greater than the set threshold value among all the determined correlation values, the next receiving window is used as the current receiving window, and at least one codeword in the broadcast channel in the current receiving window is returned. Performing a correlation operation for each specific sequence, and determining the correlation value corresponding to each specific sequence;

If multiple codewords are correlated with each specific sequence, select the specific sequence corresponding to the first M correlation values with the largest correlation value from the correlation values greater than the set threshold value as the specific sequence used for despreading processing. Sequence, M is a positive integer; when there is no correlation value greater than the set threshold value among all the determined correlation values, the next receiving window is used as the current receiving window, and at least one of the broadcast channels in the current receiving window is returned The code word is correlated with each specific sequence, and the step of determining the correlation value corresponding to each specific sequence; wherein, a code word is respectively correlated with each specific sequence, and the obtained correlation value corresponding to each specific sequence is correlated The specific sequence with the largest value is the specific sequence with the largest primary correlation value.

Optionally, when the user equipment only uses one codeword and each specific sequence for correlation calculation, if there are multiple correlation values greater than the set threshold, sort these correlation values in order from large to small, and select the first few The specific sequences corresponding to the correlation values form a specific sequence group, and each specific sequence in the specific sequence group is used as a candidate specific sequence for despreading processing. Or when the user equipment uses multiple codewords to perform correlation operations with each specific sequence, sort the number of times when the correlation value is the largest correlation value from large to small, and select the correlation value greater than the set threshold, and then select The specific sequences corresponding to the first several correlation values are selected to form a specific sequence group, and each specific sequence in the specific sequence group is used as a candidate specific sequence for despreading processing. The number of selections is related to the implementation complexity of the UE. The more the selections, the more complicated the implementation of the UE, but the detection accuracy of the broadcast channel is higher, which can prevent the broadcast channel from being missed. For the selected first several correlation values, although these correlation values all exceed the threshold, the transmitting end only uses a specific sequence for spreading, and the specific sequence can only be a specific sequence in the specific sequence group. The user equipment may sequentially select a specific sequence from the specific sequence group as the specific sequence used in the despreading process, and perform decoding and CRC check. If the CRC check is successful, it means that the broadcast channel has been successfully detected, and no other specific sequences in the specific sequence group are used for despreading, decoding, and CRC check; if the CRC check fails, the specific sequence group is used The order of the specific sequence in the sequence selects the next specific sequence as the specific sequence used in the despreading process, and performs decoding, and CRC check, and judges whether the CRC check is successful. This process is repeated until the CRC check succeeds.

Preferably, the receiver 1520 is specifically used for:

Directly correlate a codeword with a specific sequence; or take an information bit from each information block to form a codeword according to the resource mapping method of the broadcast channel, and correlate the codeword with each specific sequence; Or according to the order of each subsequence in a specific sequence, a codeword and at least one subsequence are subjected to the third correlation processing or the fourth correlation processing; wherein, the third correlation processing is to directly correlate a codeword with at least one subsequence Operation, the fourth correlation processing is to take one information bit from each information block to form a code word according to the resource mapping method of the broadcast channel, and perform correlation operation on the code word and at least one subsequence.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and combinations of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a Means for realizing the functions specified in one or more steps of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the invention have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be construed to cover the preferred embodiment as well as all changes and modifications which fall within the scope of the invention.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (36)

1. a method that sends broadcast channel, is characterized in that, the method comprises:

Network equipment needs to carry the radio frames of broadcast channel in the determining time;

Described network equipment carries out after spread processing the information of carrying in broadcast channel, in definite radio frames, to subscriber equipment, sends broadcast channel.

2. the method for claim 1, is characterized in that, described network equipment needs to carry the radio frames of broadcast channel in the determining time, comprising:

Described network equipment is according to the corresponding relation of time period and radio frames, and the radio frames that the described time period is corresponding needs to carry the radio frames of broadcast channel in the described time period.

3. method as claimed in claim 1 or 2, is characterized in that, described network equipment carries out spread processing to the information of carrying on broadcast channel, comprising:

Described network equipment adopts particular sequence corresponding to described time period to carry out spread processing to the information of carrying in broadcast channel;

Wherein, particular sequence corresponding to each time period in the cycle.

4. method as claimed in claim 3, is characterized in that, quadrature between particular sequence corresponding to each time period in the cycle.

5. method as claimed in claim 1 or 2, is characterized in that, described network equipment sends broadcast channel to subscriber equipment and comprises in definite radio frames:

Described network equipment adopts particular sequence corresponding to described time period to carry out spread processing to the information of carrying in broadcast channel;

Wherein, particular sequence corresponding to each time period in the cycle.

6. the method as described in as arbitrary in claim 1～5, is characterized in that, the information of carrying in described broadcast channel comprises the cyclic redundancy check bits CRC of the specific scramble codes scrambling that is used to indicate the described time period.

7. method as claimed in claim 6, is characterized in that, described CRC is for only passing through the CRC of described specific scramble codes scrambling; Or

Described CRC is through being used to indicate the scrambler of base station transmit antennas port and the CRC of described particular sequence scrambling.

8. the method as described in as arbitrary in claim 1～7, is characterized in that, the packets of information of carrying in described broadcast channel is containing the configuration information of downlink bandwidth indication information and/or down mixing self-retransmission indicating channel; Or

The packets of information of carrying in described broadcast channel contains the configuration information of downlink bandwidth indication information and/or down mixing self-retransmission indicating channel, and comprises system information; Or

The information of carrying in described broadcast channel comprises system information.

9. the method as described in as arbitrary in claim 1～5, is characterized in that, the information of carrying in described broadcast channel is sky information.

10. the method as described in as arbitrary in claim 1～9, is characterized in that, described network equipment carries out spread processing to the information of carrying on broadcast channel, comprising:

Described network equipment, after original information stream is carried out to chnnel coding, before broadcast channel is carried out to resource mapping, carries out spread processing to the information of carrying on broadcast channel;

Wherein, described original information stream refers to after the raw information being carried on broadcast channel and adds the information flow forming after CRC.

11. methods as described in as arbitrary in claim 1～10, is characterized in that, described network equipment carries out spread processing to the information of carrying on broadcast channel, comprising:

Each information bit in the information of carrying on broadcast channel is multiplied each other with particular sequence described network equipment successively or mould 2 adds; Or

Described network equipment by the information of carrying on broadcast channel successively with particular sequence in each multiply each other or mould 2 adds; Or

Described network equipment, according to the order of every cross-talk sequence in particular sequence, carries out the first product processing or the processing of the second product by the information of carrying on broadcast channel and each subsequence; Wherein, to process be each information bit in the information of carrying on broadcast channel to be multiplied each other with subsequence successively or mould 2 adds to the first product; The second product process be by the information of carrying on broadcast channel successively with subsequence in each multiply each other or mould 2 adds.

12. 1 kinds of methods that receive broadcast channel, is characterized in that, the method comprises:

Subscriber equipment receives broadcast channel constantly with the starting point of current wireless frame, and the information of carrying in broadcast channel is detected;

Described subscriber equipment is separated spread processing to the information of carrying in the broadcast channel detecting.

13. methods as claimed in claim 12, is characterized in that, described subscriber equipment receives broadcast channel constantly with the starting point of current wireless frame, and after the information of carrying in broadcast channel is detected, also comprise:

Described subscriber equipment is according to the corresponding relation of time period and radio frames, and definite radio frames corresponding to time period that broadcast channel detected is the radio frames of carrying broadcast channel;

Described subscriber equipment, according to the time period under the radio frames of the radio frames of carrying broadcast channel and carrying broadcast channel, is determined System Frame Number.

14. methods as claimed in claim 13, is characterized in that, described subscriber equipment is determined the time period under the radio frames of carrying broadcast channel according to following manner:

Described subscriber equipment, according to the corresponding relation of time period and particular sequence, is determined when the information of carrying in the broadcast channel detecting is separated to spread processing, the affiliated time period of radio frames that the time period that the particular sequence of employing is corresponding is carrying broadcast channel.

15. methods as described in claim 13 or 14, is characterized in that, described subscriber equipment is determined the time period under the radio frames of carrying broadcast channel according to following manner:

Described subscriber equipment, according to the specific scramble codes to the time period that is used to indicate the radio frames place that need to carry broadcast channel of the upper scrambling of the cyclic redundancy check bit CRC in the information of carrying in the broadcast channel detecting, is determined the affiliated time period of radio frames of carrying broadcast channel.

16. methods as claimed in claim 15, is characterized in that, described CRC is for only passing through the CRC of described specific scramble codes scrambling; Or

Described CRC is through being used to indicate the scrambler of base station transmit antennas port and the CRC of described particular sequence scrambling.

17. methods as described in as arbitrary in claim 12～16, is characterized in that, the packets of information of carrying in described broadcast channel is containing the configuration information of downlink bandwidth indication information and/or down mixing self-retransmission indicating channel; Or

The packets of information of carrying in broadcast channel contains the configuration information of downlink bandwidth indication information and/or down mixing self-retransmission indicating channel, and comprises system information; Or

The information of carrying in broadcast channel comprises system information.

18. methods as described in as arbitrary in claim 12～14, is characterized in that, the information of carrying in broadcast channel is sky information.

19. methods as described in as arbitrary in claim 12～18, is characterized in that, described subscriber equipment is separated spread processing to the information of carrying on broadcast channel, comprising:

Described subscriber equipment, after carrying out resource demapping, before carrying out channel decoding, adopts particular sequence to separate spread processing to the information of carrying on broadcast channel.

20. methods as claimed in claim 19, is characterized in that, the particular sequence that described subscriber equipment adopts while separating spread processing according to following manner is definite:

Described subscriber equipment starts constantly with the starting point of current wireless frame, according to the resource mapping method of broadcast channel, receives broadcast channel;

Described subscriber equipment carries out related operation by least one code word in the broadcast channel in current receiver window and each particular sequence, determines the correlation corresponding with each particular sequence;

If a code word is carried out related operation with each particular sequence respectively, the particular sequence of selecting particular sequence that maximum top n correlation is corresponding to adopt when separating spread processing from be greater than the correlation of setting threshold value, N is positive integer; While not being greater than the correlation of setting threshold value in all correlations of determining, using next receiver window as current receiver window, and return at least one code word in the broadcast channel in current receiver window and each particular sequence are carried out to related operation, determine the step of the correlation that each particular sequence is corresponding;

If a plurality of code words are carried out related operation with each particular sequence respectively, the particular sequence of selecting particular sequence corresponding to the front M correlations value of correlation maximum to adopt when separating spread processing from be greater than the correlation of setting threshold value, M is positive integer; While not being greater than the correlation of setting threshold value in all correlations of determining, using next receiver window as current receiver window, and return at least one code word in the broadcast channel in current receiver window and each particular sequence are carried out to related operation, determine the step of the correlation that each particular sequence is corresponding; Wherein, a code word is carried out related operation with each particular sequence respectively, and in correlation corresponding to each particular sequence of obtaining, the particular sequence of correlation maximum is the particular sequence of a correlation maximum.

21. methods as claimed in claim 20, is characterized in that, described subscriber equipment carries out code word in the broadcast channel in current receiver window and a particular sequence according to following manner relevant, comprising:

Described subscriber equipment is directly done relevant by a code word to a particular sequence; Or

Described subscriber equipment, according to the resource mapping method of broadcast channel, takes out an information bit and forms a code word from each block of information, and this code word and each particular sequence are made to related operation; Or

Described subscriber equipment, according to the order of every cross-talk sequence in a particular sequence, carries out the processing of third phase pass or the 4th relevant treatment by a numeral and at least one subsequence; Wherein, it is that a code word is direct that third phase closes processing and at least one subsequence makes related operation, the 4th relevant treatment is the resource mapping method according to broadcast channel, takes out an information bit and form a code word from each block of information, and this code word and at least one subsequence are made to related operation.

22. 1 kinds of network equipments that send broadcast channel, is characterized in that, this network equipment comprises:

Determination module, the radio frames that needs to carry broadcast channel for the determining time;

Sending module, carries out after spread processing for the information that broadcast channel is carried, and in definite radio frames, to subscriber equipment, sends broadcast channel.

23. network equipments as claimed in claim 22, is characterized in that, described determination module specifically for:

According to the corresponding relation of time period and radio frames, the radio frames that the described time period is corresponding needs to carry the radio frames of broadcast channel in the described time period.

24. network equipments as described in claim 22 or 23, is characterized in that, described sending module specifically for:

Adopt particular sequence corresponding to described time period to carry out spread processing to the information of carrying in broadcast channel;

Wherein, particular sequence corresponding to each time period in the cycle.

25. network equipments as described in claim 22 or 23, is characterized in that, described sending module specifically for:

Adopt particular sequence corresponding to described time period to carry out spread processing to the information of carrying in broadcast channel;

Wherein, particular sequence corresponding to each time period in the cycle.

26. network equipments as described in as arbitrary in claim 22～25, is characterized in that, the information of carrying in described broadcast channel comprises the cyclic redundancy check bits CRC of the specific scramble codes scrambling that is used to indicate the described time period.

27. network equipments as described in as arbitrary in claim 22～26, is characterized in that, described sending module specifically for:

After original information stream is carried out to chnnel coding, before broadcast channel is carried out to resource mapping, the information of carrying on broadcast channel is carried out to spread processing;

Wherein, described original information stream refers to after the raw information being carried on broadcast channel and adds the information flow forming after CRC.

28. network equipments as described in as arbitrary in claim 22～27, is characterized in that, described sending module specifically for:

Each information bit in the information of carrying on broadcast channel is multiplied each other with particular sequence successively or mould 2 adds; Or

By the information of carrying on broadcast channel successively with particular sequence in each multiply each other or mould 2 adds; Or

According to the order of every cross-talk sequence in particular sequence, the information of carrying on broadcast channel and each subsequence are carried out to the first product processing or the processing of the second product; Wherein, to process be each information bit in the information of carrying on broadcast channel to be multiplied each other with subsequence successively or mould 2 adds to the first product; The second product process be by the information of carrying on broadcast channel successively with subsequence in each multiply each other or mould 2 adds.

29. 1 kinds of subscriber equipmenies that receive broadcast channel, is characterized in that, this subscriber equipment comprises:

Detection module, receives broadcast channel constantly for the starting point with current wireless frame, and the information of carrying in broadcast channel is detected;

Receiver module, separates spread processing for the information that the broadcast channel detecting is carried.

30. subscriber equipmenies as claimed in claim 29, is characterized in that, described receiver module also for:

According to the corresponding relation of time period and radio frames, the radio frames that definite radio frames corresponding to time period that broadcast channel detected is carrying broadcast channel; According to the time period under the radio frames of the radio frames of carrying broadcast channel and carrying broadcast channel, determine System Frame Number.

31. subscriber equipmenies as claimed in claim 30, is characterized in that, described receiver module specifically for:

According to the corresponding relation of time period and particular sequence, to determine when the information of carrying in the broadcast channel detecting is separated to spread processing, the time period that the particular sequence of employing is corresponding is the time period under the radio frames of carrying broadcast channel.

32. subscriber equipmenies as described in claim 30 or 31, is characterized in that, described receiver module specifically for:

According to the specific scramble codes of the time period that is used to indicate the radio frames place that need to carry broadcast channel of the upper scrambling of the CRC in the information of carrying in the broadcast channel detecting, determine the affiliated time period of radio frames of carrying broadcast channel.

33. subscriber equipmenies as described in as arbitrary in claim 29～32, is characterized in that, described receiver module also for:

After carrying out resource demapping, before carrying out channel decoding, adopt particular sequence to separate spread processing to the information of carrying on broadcast channel.

34. subscriber equipmenies as described in as arbitrary in claim 29～32, is characterized in that, described receiver module also for:

Starting point with current wireless frame starts constantly, according to the resource mapping method of broadcast channel, receives broadcast channel; At least one code word in broadcast channel in current receiver window and each particular sequence are carried out to related operation, determine the correlation corresponding with each particular sequence;

If a code word is carried out related operation with each particular sequence respectively, the particular sequence of selecting particular sequence that maximum top n correlation is corresponding to adopt when separating spread processing from be greater than the correlation of setting threshold value, N is positive integer; While not being greater than the correlation of setting threshold value in all correlations of determining, using next receiver window as current receiver window, and return at least one code word in the broadcast channel in current receiver window and each particular sequence are carried out to related operation, determine the step of the correlation that each particular sequence is corresponding;

If a plurality of code words are carried out related operation with each particular sequence respectively, the particular sequence of selecting particular sequence corresponding to the front M correlations value of correlation maximum to adopt when separating spread processing from be greater than the correlation of setting threshold value, M is positive integer; While not being greater than the correlation of setting threshold value in all correlations of determining, using next receiver window as current receiver window, and return at least one code word in the broadcast channel in current receiver window and each particular sequence are carried out to related operation, determine the step of the correlation that each particular sequence is corresponding; Wherein, a code word is carried out related operation with each particular sequence respectively, and in correlation corresponding to each particular sequence of obtaining, the particular sequence of correlation maximum is the particular sequence of a correlation maximum.

35. subscriber equipmenies as claimed in claim 34, is characterized in that, described receiver module specifically for:

Directly a code word and a particular sequence are made to related operation; Or according to the resource mapping method of broadcast channel, from each block of information, take out an information bit and form a code word, this code word and each particular sequence are made to related operation; Or according to the order of every cross-talk sequence in a particular sequence, a numeral and at least one subsequence are carried out to the processing of third phase pass or the 4th relevant treatment; Wherein, it is that a code word is direct that third phase closes processing and at least one subsequence makes related operation, the 4th relevant treatment is the resource mapping method according to broadcast channel, takes out an information bit and form a code word from each block of information, and this code word and at least one subsequence are made to related operation.

36. 1 kinds of systems that receive broadcast channel, is characterized in that, this system comprises:

Network equipment, the radio frames that needs to carry broadcast channel for the determining time, carries out after spread processing the information of carrying in broadcast channel, in definite radio frames, to subscriber equipment, sends broadcast channel;

Subscriber equipment, receives broadcast channel constantly for the starting point with current wireless frame, and the information of carrying in broadcast channel is detected, and the information of carrying in the broadcast channel detecting is separated to spread processing.