CN104104466A - Broadcast channel transmitting and receiving method, system and equipment - Google Patents
Broadcast channel transmitting and receiving method, system and equipment Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
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- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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Abstract
本发明涉及无线通信技术领域,特别涉及一种发送和接收广播信道的方法、系统及设备,用以增强传输广播信道。本发明实施例的方法包括:网络侧设备确定时间段中需要承载广播信道的无线帧;所述网络侧设备对广播信道中承载的信息进行扩频处理后,在确定的无线帧上向用户设备发送广播信道。由于本发明实施例网络侧设备对广播信道中承载的信息进行扩频处理后发送,接收端会获得扩频增益,相当于提高了接收端的接收信号功率。使得传输广播信道得到了增强。
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
技术领域technical field
本发明涉及无线通信技术领域,特别涉及一种发送和接收广播信道的方法、系统及设备。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.
背景技术Background technique
目前LTE(Long Term Evolution,长期演进)系统中,PBCH(PhysicalBroadcast Channel,物理广播信道)承载:下行带宽指示信息(3比特),PHICH(Physical Hybrid-ARQ Indication Channel,物理层混合自动重传指示信道)信道配置信息(3比特),系统帧号(8比特)和10位空闲。其中下行带宽指示信息表示发送PBCH所在的载波的下行系统带宽。PHICH用于承载对用户设备发送的PUSCH(Physical Uplink Shared Channel,物理上行共享信道)上的数据是否正确接收的确认信息,当eNB(Evolved Node Base station,演进型基站)没有正确检测UE(User Equipment,用户设备)发送的PUSCH时,PHICH承载NACK(Negative Acknowledge,否定的确认),否则,承载ACK(Acknowledge,确认)。这里PHICH的配置信息是指PHICH资源映射时时域上占用的OFDM(Orthogonal Frequency Division Multiplexing,正交频分复用)符号以及频域上PHICH的分组个数。系统帧号是从#0号帧开始编号到#1023号帧,然后再从#0开始循环。表示1024个帧的编号共需要10个比特,PBCH仅承载高8位的比特,最低的2位比特通过检测PBCH时的扰码获得。小区的最大覆盖范围一般是指基站以最大发送功率发出的信号,如果UE能以一定的概率正确检测出发送的信号,UE所在的位置都在小区的覆盖范围之内。影响小区覆盖的因素很多,包括:无线信号的穿透损耗、用户接收机的灵敏度等。其中,建筑物是造成信号穿透损耗的主要因素,特别是楼层之间,尤其是地下室场景下,信号的穿透损耗非常大。以图1为例,UE1、UE2、UE3、UE4和UE5距离基站的距离相当,但UE1和UE4位于露天场所或者地面上;UE2、UE3和UE4分别位于地下室。测试表明,相比于地面上的UE,地下室的用户接收到基站发送的信号有近20dB的损失。换句话说,从基站角度,能覆盖地下室用户的范围要比覆盖地面用户的范围小得多。为了使得地下室UE和地面UE能达到相同的覆盖范围,需要对地下室UE的接收信号进行增强,从而提高地下室用户信号的接收信噪比,即和距离基站相当的UE相比,补偿楼层的穿透损耗,使得地下室UE和地面UE接收到的信号强度也相当,从而实现覆盖增强的目的。如果UE无法收到PBCH,就无法获得SFN(System FrameNumber,系统帧号),也就无法进行数据传输。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.
发明内容Contents of the invention
本发明提供一种发送和接收广播信道的方法、系统及设备,用以增强传输广播信道。The present invention provides a method, system and equipment for sending and receiving broadcast channels to enhance transmission of broadcast channels.
第一方面,提供一种发送广播信道的方法,包括:In a first aspect, a method for sending a broadcast channel is provided, including:
网络侧设备确定时间段中需要承载广播信道的无线帧;The network side device determines the wireless frame that needs to carry the broadcast channel in the time period;
所述网络侧设备对广播信道中承载的信息进行扩频处理后,在确定的无线帧上向用户设备发送广播信道。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.
结合第一方面,在第一种可能的实现方式中,所述网络侧设备确定时间段中需要承载广播信道的无线帧,包括: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:
所述网络侧设备根据时间段和无线帧的对应关系,将所述时间段对应的无线帧作为所述时间段中需要承载广播信道的无线帧。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.
结合第一方面或者第一方面的第一种可能的实现方式,在第二种可能的实现方式中,所述网络侧设备对广播信道上承载的信息进行扩频处理,包括: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:
所述网络侧设备采用所述时间段对应的特定序列对广播信道中承载的信息进行扩频处理;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;
其中,周期内的每个时间段对应不同的特定序列。Wherein, each time period in the cycle corresponds to a different specific sequence.
结合第一方面的第一种可能的实现方式,在第三种可能的实现方式中,周期内的每个时间段对应的特定序列之间正交。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.
结合第一方面或第一方面的第一种可能的实现方式,在第四种可能的实现方式中,所述网络侧设备在确定的无线帧上向用户设备发送广播信道包括: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:
所述网络侧设备采用所述时间段对应的特定序列对广播信道中承载的信息进行扩频处理;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;
其中,周期内的每个时间段对应相同的特定序列。Wherein, each time period in the cycle corresponds to the same specific sequence.
结合第一方面或第一方面的第一种可能的实现方式到第四种可能的实现方式中的一种,在第五种可能的实现方式中,所述广播信道中承载的信息包括采用用于指示所述时间段的特定扰码加扰的循环冗余校验比特CRC。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.
结合第一方面的第五种可能的实现方式,第六种可能的实现方式中,所述CRC为仅经过特定扰码加扰的CRC;或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
所述CRC为经过用于指示基站发射天线端口的扰码和特定序列加扰的CRC。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.
结合第一方面或第一方面的第一种可能的实现方式到第六种可能的实现方式中的一种,在第七种可能的实现方式中,所述广播信道中承载的信息包含下行带宽指示信息和/或下行混合自动重传指示信道的配置信息;或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
所述广播信道中承载的信息包含下行带宽指示信息和/或下行混合自动重传指示信道的配置信息,且包括系统信息;或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
所述广播信道中承载的信息中包括系统信息。The information carried on the broadcast channel includes system information.
结合第一方面或第一方面的第一种可能的实现方式到第四种可能的实现方式中的一种,在第八种可能的实现方式中,所述广播信道中承载的信息是空信息。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 .
结合第一方面或第一方面的第一种可能的实现方式到第八种可能的实现方式中的一种,在第九种可能的实现方式中,所述网络侧设备对广播信道上承载的信息进行扩频处理,包括: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:
所述网络侧设备在对原始信息流进行信道编码之后,在对广播信道进行资源映射之前,对广播信道上承载的信息进行扩频处理;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;
其中,所述原始信息流是指承载在广播信道上的原始信息后面添加CRC后形成的信息流。Wherein, the original information flow refers to the information flow formed by adding CRC after the original information carried on the broadcast channel.
结合第一方面或第一方面的第一种可能的实现方式到第九种可能的实现方式中的一种,在第十种可能的实现方式中,所述网络侧设备对广播信道上承载的信息进行扩频处理,包括: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:
所述网络侧设备将广播信道上承载的信息中的每一个信息位依次与特定序列相乘或模2加;或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
所述网络侧设备将广播信道上承载的信息依次与特定序列中的每一位相乘或模2加;或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
所述网络侧设备按照特定序列中每段子序列的顺序,将广播信道上承载的信息与每个子序列进行第一乘积处理或第二乘积处理;其中,第一乘积处理是将广播信道上承载的信息中的每一个信息位依次与子序列相乘或模2加;第二乘积处理是将广播信道上承载的信息依次与子序列中的每一位相乘或模2加。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.
第二方面,提供一种接收广播信道的方法,包括:In a second aspect, a method for receiving a broadcast channel is provided, including:
用户设备以当前无线帧的起点时刻接收广播信道,并对广播信道中承载的信息进行检测;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;
所述用户设备对检测到的广播信道中承载的信息进行解扩频处理。The user equipment performs despreading processing on the detected information carried in the broadcast channel.
结合第二方面,在第一种可能的实现方式中,所述用户设备以当前无线帧的起点时刻接收广播信道,并对广播信道中承载的信息进行检测之后,还包括: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:
所述用户设备根据时间段和无线帧的对应关系,确定检测到广播信道的时间段对应的无线帧为承载广播信道的无线帧;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;
所述用户设备根据承载广播信道的无线帧和承载广播信道的无线帧所属的时间段,确定系统帧号。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.
结合第二方面的第一种可能的实现方式,在第二种可能的实现方式中,所述用户设备根据下列方式确定承载广播信道的无线帧所属的时间段: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:
所述用户设备根据时间段和特定序列的对应关系,确定对检测到的广播信道中承载的信息进行解扩频处理时,采用的特定序列对应的时间段为承载广播信道的无线帧所属的时间段。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.
结合第二方面的第一种可能的实现方式或第二种可能的实现方式,在第三种可能的实现方式中,所述用户设备根据下列方式确定承载广播信道的无线帧所属的时间段: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:
所述用户设备根据对检测到的广播信道中承载的信息中的循环冗余检验比特CRC上加扰的用于指示需要承载广播信道的无线帧所在的时间段的特定扰码,确定承载广播信道的无线帧所属的时间段。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.
结合第二方面的第四种可能的实现方式,在第五种可能的实现方式中,所述CRC为仅经过所述特定扰码加扰的CRC;或所述CRC为经过用于指示基站发射天线端口的扰码和所述特定序列加扰的CRC。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.
结合第二方面或第二方面的第一种可能的实现方式到第四种可能的实现方式中的一种,在第五种可能的实现方式中,广播信道中承载的信息包含下行带宽指示信息和/或下行混合自动重传指示信道的配置信息;或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
广播信道中承载的信息包含下行带宽指示信息和/或下行混合自动重传指示信道的配置信息,且包括系统信息;或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
广播信道中承载的信息中包括系统信息。The information carried on the broadcast channel includes system information.
结合第二方面或第二方面的第一种可能的实现方式或第二方面的第二种可能的实现方式,在第六种可能的实现方式中,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,
广播信道中不承载任何信息。No information is carried in the broadcast channel.
结合第二方面或第二方面的第一种可能的实现方式到第六种可能的实现方式中的一种,在第七种可能的实现方式中,所述用户设备对广播信道上承载的信息进行解扩频处理,还包括: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:
所述用户设备在进行资源解映射之后,进行信道译码之前,采用特定序列对广播信道上承载的信息进行解扩频处理。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.
结合第二方面或第二方面的第一种可能的实现方式到第七种可能的实现方式中的一种,在第八种可能的实现方式中,所述用户设备根据下列方式确定进行解扩频处理时采用的特定序列: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:
所述用户设备以当前无线帧的起点时刻开始,按照广播信道的资源映射方式接收广播信道;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;
所述用户设备将当前接收窗内的广播信道中的至少一个码字与每个特定序列进行相关运算,确定与每个特定序列对应的相关值;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;
若一个码字分别与每个特定序列进行相关运算,从大于设定门限值的相关值中选择最大的前N个相关值对应的特定序列作为进行解扩频处理时采用的特定序列,N为正整数;在确定的所有相关值中没有大于设定门限值的相关值时,将下一接收窗作为当前接收窗,并返回将当前接收窗内的广播信道中的至少一个码字与每个特定序列进行相关运算,确定每个特定序列对应的相关值的步骤;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;
若多个码字分别与每个特定序列进行相关运算,从大于设定门限值的相关值中选择相关值最大的前M次相关值对应的特定序列作为进行解扩频处理时采用的特定序列,M为正整数;在确定的所有相关值中没有大于设定门限值的相关值时,将下一接收窗作为当前接收窗,并返回将当前接收窗内的广播信道中的至少一个码字与每个特定序列进行相关运算,确定每个特定序列对应的相关值的步骤;其中,一个码字分别与每个特定序列进行相关运算,得到的每个特定序列对应的相关值中相关值最大的特定序列为一次相关值最大的特定序列。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.
结合第二方面的第八种可能的实现方式中的一种,在第九种可能的实现方式中,所述用户设备根据下列方式将当前接收窗内的广播信道中的一个码字与一个特定序列进行相关运算,包括: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:
所述用户设备直接将一个码字与一个特定序列作相关运算;或The user equipment directly correlates a codeword with a specific sequence; or
所述用户设备按照广播信道的资源映射方式,从每个信息块中取出一个信息位组成一个码字,将该码字与每个特定序列作相关运算;或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
所述用户设备按照一个特定序列中每段子序列的顺序,将一个码子与至少一个子序列进行第三相关处理或第四相关处理;其中,第三相关处理是将一个码字直接与至少一个子序列作相关运算,第四相关处理是按照广播信道的资源映射方式,从每个信息块中取出一个信息位组成一个码字,将该码字与至少一个子序列作相关运算。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.
第三方面,提供一种发送广播信道的网络侧设备,包括:In a third aspect, a network-side device for sending a broadcast channel is provided, including:
确定模块,用于确定时间段中需要承载广播信道的无线帧;A determining module, configured to determine the wireless frames that need to carry the broadcast channel in the time period;
发送模块,用于对广播信道中承载的信息进行扩频处理后,在确定的无线帧上向用户设备发送广播信道。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.
结合第三方面,在第一种可能的实现方式中,所述确定模块具体用于:With reference to the third aspect, in a first possible implementation manner, the determining module is specifically configured to:
根据时间段和无线帧的对应关系,将所述时间段对应的无线帧作为所述时间段中需要承载广播信道的无线帧。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.
结合第三方面或者第三方面的第一种可能的实现方式,在第二种可能的实现方式中,所述发送模块具体用于: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:
采用所述时间段对应的特定序列对广播信道中承载的信息进行扩频处理;其中,周期内的每个时间段对应不同的特定序列。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.
结合第三方面或第三方面的第一种可能的实现方式,在第三种可能的实现方式中,所述发送模块具体用于: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:
采用所述时间段对应的特定序列对广播信道中承载的信息进行扩频处理;performing spread spectrum processing on the information carried in the broadcast channel by using a specific sequence corresponding to the time period;
其中,周期内的每个时间段对应相同的特定序列。Wherein, each time period in the cycle corresponds to the same specific sequence.
结合第三方面或第三方面的第一种可能的实现方式到第三种可能的实现方式中的一种,在第四种可能的实现方式中,所述广播信道中承载的信息包括采用用于指示所述时间段的特定扰码加扰的CRC。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.
结合第三方面或第三方面的第一种可能的实现方式到第四种可能的实现方式中的一种,在第五种可能的实现方式中,所述发送模块具体用于: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:
在对原始信息流进行信道编码之后,在对广播信道进行资源映射之前,对广播信道上承载的信息进行扩频处理;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;
其中,所述原始信息流是指承载在广播信道上的原始信息后面添加CRC后形成的信息流。Wherein, the original information flow refers to the information flow formed by adding CRC after the original information carried on the broadcast channel.
结合第三方面或第三方面的第一种可能的实现方式到第五种可能的实现方式中的一种,在第六种可能的实现方式中,所述发送模块具体用于: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:
将广播信道上承载的信息中的每一个信息位依次与特定序列相乘或模2加;或multiplying or modulo-2 adding each information bit in the information carried on the broadcast channel with a specific sequence in turn; or
将广播信道上承载的信息依次与特定序列中的每一位相乘或模2加;或Multiply or add modulo 2 the information carried on the broadcast channel to each bit in the specified sequence in turn; or
按照特定序列中每段子序列的顺序,将广播信道上承载的信息与每个子序列进行第一乘积处理或第二乘积处理;其中,第一乘积处理是将广播信道上承载的信息中的每一个信息位依次与子序列相乘或模2加;第二乘积处理是将广播信道上承载的信息依次与子序列中的每一位相乘或模2加。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.
第四方面,提供一种接收广播信道的用户设备,包括:In a fourth aspect, a user equipment for receiving a broadcast channel is provided, including:
检测模块,用于以当前无线帧的起点时刻接收广播信道,并对广播信道中承载的信息进行检测;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;
接收模块,用于对检测到的广播信道中承载的信息进行解扩频处理。The receiving module is configured to perform despreading processing on the detected information carried in the broadcast channel.
结合第四方面,在第一种可能的实现方式中,所述接收模块还用于:With reference to the fourth aspect, in a first possible implementation manner, the receiving module is further configured to:
根据时间段和无线帧的对应关系,确定检测到广播信道的时间段对应的无线帧为承载广播信道的无线帧;根据承载广播信道的无线帧和承载广播信道的无线帧所属的时间段,确定系统帧号。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.
结合第四方面的第一种可能的实现方式,在第二种可能的实现方式中,所述接收模块具体用于:With reference to the first possible implementation of the fourth aspect, in a second possible implementation, the receiving module is specifically configured to:
根据时间段和特定序列的对应关系,确定对检测到的广播信道中承载的信息进行解扩频处理时,采用的特定序列对应的时间段为承载广播信道的无线帧所属的时间段。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.
结合第四方面的第一种可能的实现方式或第二种可能的实现方式中,在第三种可能的实现方式中,所述接收模块具体用于: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:
根据对检测到的广播信道中承载的信息中的CRC上加扰的用于指示需要承载广播信道的无线帧所在的时间段的特定扰码,确定承载广播信道的无线帧所属的时间段。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.
结合第四方面或第四方面的第一种可能的实现方式到第三种可能的实现方式中的一种,在第四种可能的实现方式中,所述接收模块具体用于:在进行资源解映射之后,进行信道译码之前,采用特定序列对广播信道上承载的信息进行解扩频处理。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.
结合第四方面或第四方面的第一种可能的实现方式到第四种可能的实现方式中的一种,在第五种可能的实现方式中,所述接收模块具体用于: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:
以当前无线帧的起点时刻开始,按照广播信道的资源映射方式接收广播信道;将当前接收窗内的广播信道中的至少一个码字与每个特定序列进行相关运算,确定与每个特定序列对应的相关值;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;
若一个码字分别与每个特定序列进行相关运算,从大于设定门限值的相关值中选择最大的前N个相关值对应的特定序列作为进行解扩频处理时采用的特定序列,N为正整数;在确定的所有相关值中没有大于设定门限值的相关值时,将下一接收窗作为当前接收窗,并返回将当前接收窗内的广播信道中的至少一个码字与每个特定序列进行相关运算,确定每个特定序列对应的相关值的步骤;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;
若多个码字分别与每个特定序列进行相关运算,从大于设定门限值的相关值中选择相关值最大的前M次相关值对应的特定序列作为进行解扩频处理时采用的特定序列,M为正整数;在确定的所有相关值中没有大于设定门限值的相关值时,将下一接收窗作为当前接收窗,并返回将当前接收窗内的广播信道中的至少一个码字与每个特定序列进行相关运算,确定每个特定序列对应的相关值的步骤;其中,一个码字分别与每个特定序列进行相关运算,得到的每个特定序列对应的相关值中相关值最大的特定序列为一次相关值最大的特定序列。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.
结合第四方面的第五种可能的实现方式,在第六种可能的实现方式中,所述接收模块具体用于:With reference to the fifth possible implementation of the fourth aspect, in a sixth possible implementation, the receiving module is specifically configured to:
直接将一个码字与一个特定序列作相关运算;或按照广播信道的资源映射方式,从每个信息块中取出一个信息位组成一个码字,将该码字与每个特定序列作相关运算;或按照一个特定序列中每段子序列的顺序,将一个码子与至少一个子序列进行第三相关处理或第四相关处理;其中,第三相关处理是将一个码字直接与至少一个子序列作相关运算,第四相关处理是按照广播信道的资源映射方式,从每个信息块中取出一个信息位组成一个码字,将该码字与至少一个子序列作相关运算。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.
第五方面,提供一种发送广播信道的网络侧设备,包括:In the fifth aspect, a network-side device for sending a broadcast channel is provided, including:
处理器,用于确定时间段中需要承载广播信道的无线帧,并将确定的无线帧通知给发射器;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;
发射器,用于对广播信道中承载的信息进行扩频处理后,在处理器通知的无线帧上向用户设备发送广播信道。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.
结合第五方面,在第一种可能的实现方式中,所述处理器具体用于:With reference to the fifth aspect, in a first possible implementation manner, the processor is specifically configured to:
根据时间段和无线帧的对应关系,将所述时间段对应的无线帧作为所述时间段中需要承载广播信道的无线帧。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.
结合第五方面或者第五方面的第一种可能的实现方式,在第二种可能的实现方式中,所述发射器具体用于: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:
采用所述时间段对应的特定序列对广播信道中承载的信息进行扩频处理;performing spread spectrum processing on the information carried in the broadcast channel by using a specific sequence corresponding to the time period;
其中,周期内的每个时间段对应不同的特定序列。Wherein, each time period in the cycle corresponds to a different specific sequence.
结合第五方面或第五方面的第一种可能的实现方式,在第三种可能的实现方式中,所述发送模块具体用于: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:
采用所述时间段对应的特定序列对广播信道中承载的信息进行扩频处理;performing spread spectrum processing on the information carried in the broadcast channel by using a specific sequence corresponding to the time period;
其中,周期内的每个时间段对应相同的特定序列。Wherein, each time period in the cycle corresponds to the same specific sequence.
结合第五方面、第五方面的第一种可能的实现方式到第三种可能的实现方式中的一种,在第四种可能的实现方式中,所述广播信道中承载的信息包括采用用于指示所述时间段的特定扰码加扰的CRC。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.
结合第五方面或第五方面的第一种可能的实现方式到第四种可能的实现方式中的一种,在第五种可能的实现方式中,所述发送模块具体用于: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:
在对原始信息流进行信道编码之后,在对广播信道进行资源映射之前,对广播信道上承载的信息进行扩频处理;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;
其中,所述原始信息流是指承载在广播信道上的原始信息后面添加CRC后形成的信息流。Wherein, the original information flow refers to the information flow formed by adding CRC after the original information carried on the broadcast channel.
结合第五方面或第五方面的第一种可能的实现方式到第五种可能的实现方式中的一种,在第六种可能的实现方式中,所述发送模块具体用于: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:
将广播信道上承载的信息中的每一个信息位依次与特定序列相乘或模2加;或multiplying or modulo-2 adding each information bit in the information carried on the broadcast channel with a specific sequence in turn; or
将广播信道上承载的信息依次与特定序列中的每一位相乘或模2加;或Multiply or add modulo 2 the information carried on the broadcast channel to each bit in the specified sequence in turn; or
按照特定序列中每段子序列的顺序,将广播信道上承载的信息与每个子序列进行第一乘积处理或第二乘积处理;其中,第一乘积处理是将广播信道上承载的信息中的每一个信息位依次与子序列相乘或模2加;第二乘积处理是将广播信道上承载的信息依次与子序列中的每一位相乘或模2加。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.
第六方面,提供一种接收广播信道的用户设备,包括:In a sixth aspect, a user equipment for receiving a broadcast channel is provided, including:
处理器,用于以当前无线帧的起点时刻接收广播信道,并对广播信道中承载的信息进行检测,在检测到信息后,通知接收器;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;
接收器,用于在接收到处理器的通知后,对检测到的广播信道中承载的信息进行解扩频处理。The receiver is configured to perform despreading processing on the detected information carried in the broadcast channel after receiving the notification from the processor.
结合第六方面,在第一种可能的实现方式中,所述接收器还用于:With reference to the sixth aspect, in a first possible implementation manner, the receiver is further configured to:
根据时间段和无线帧的对应关系,确定检测到广播信道的时间段对应的无线帧为承载广播信道的无线帧;根据承载广播信道的无线帧和承载广播信道的无线帧所属的时间段,确定系统帧号。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.
结合第六方面的第一种可能的实现方式,在第二种可能的实现方式中,所述接收模块具体用于: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:
根据时间段和特定序列的对应关系,确定对检测到的广播信道中承载的信息进行解扩频处理时,采用的特定序列对应的时间段为承载广播信道的无线帧所属的时间段。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.
结合第六方面的第一种可能的实现方式或第二种可能的实现方式中,在第三种可能的实现方式中,所述接收模块具体用于: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:
根据对检测到的广播信道中承载的信息中的CRC上加扰的用于指示需要承载广播信道的无线帧所在的时间段的特定扰码,确定承载广播信道的无线帧所属的时间段。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.
结合第六方面或第六方面的第一种可能的实现方式到第三种可能的实现方式中的一种,在第四种可能的实现方式中,所述接收模块具体用于: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:
在进行资源解映射之后,进行信道译码之前,采用特定序列对广播信道上承载的信息进行解扩频处理。After resource demapping and before channel decoding, a specific sequence is used to despread the information carried on the broadcast channel.
结合第六方面或第六方面的第一种可能的实现方式到第四种可能的实现方式中的一种,在第五种可能的实现方式中,所述接收模块具体用于: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:
以当前无线帧的起点时刻开始,按照广播信道的资源映射方式接收广播信道;将当前接收窗内的广播信道中的至少一个码字与每个特定序列进行相关运算,确定与每个特定序列对应的相关值;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;
若一个码字分别与每个特定序列进行相关运算,从大于设定门限值的相关值中选择最大的前N个相关值对应的特定序列作为进行解扩频处理时采用的特定序列,N为正整数;在确定的所有相关值中没有大于设定门限值的相关值时,将下一接收窗作为当前接收窗,并返回将当前接收窗内的广播信道中的至少一个码字与每个特定序列进行相关运算,确定每个特定序列对应的相关值的步骤;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;
若多个码字分别与每个特定序列进行相关运算,从大于设定门限值的相关值中选择相关值最大的前M次相关值对应的特定序列作为进行解扩频处理时采用的特定序列,M为正整数;在确定的所有相关值中没有大于设定门限值的相关值时,将下一接收窗作为当前接收窗,并返回将当前接收窗内的广播信道中的至少一个码字与每个特定序列进行相关运算,确定每个特定序列对应的相关值的步骤;其中,一个码字分别与每个特定序列进行相关运算,得到的每个特定序列对应的相关值中相关值最大的特定序列为一次相关值最大的特定序列。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.
结合第六方面的第五种可能的实现方式,在第六种可能的实现方式中,所述接收模块具体用于: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:
直接将一个码字与一个特定序列作相关运算;或按照广播信道的资源映射方式,从每个信息块中取出一个信息位组成一个码字,将该码字与每个特定序列作相关运算;或按照一个特定序列中每段子序列的顺序,将一个码子与至少一个子序列进行第三相关处理或第四相关处理;其中,第三相关处理是将一个码字直接与至少一个子序列作相关运算,第四相关处理是按照广播信道的资源映射方式,从每个信息块中取出一个信息位组成一个码字,将该码字与至少一个子序列作相关运算。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.
第七方面,一种接收广播信道的系统,包括:In a seventh aspect, a system for receiving a broadcast channel includes:
网络侧设备,用于确定时间段中需要承载广播信道的无线帧,对广播信道中承载的信息进行扩频处理后,在确定的无线帧上向用户设备发送广播信道;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;
用户设备,用于以当前无线帧的起点时刻接收广播信道,并对广播信道中承载的信息进行检测,对检测到的广播信道中承载的信息进行解扩频处理。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.
本发明实施例网络侧设备备对广播信道中承载的信息进行扩频处理后,在确定的无线帧上向用户设备发送广播信道,由于本发明实施例网络侧设备对广播信道中承载的信息进行扩频处理后发送,接收端会获得扩频增益,相当于提高了接收端的接收信号功率。使得传输广播信道得到了增强。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.
附图说明Description of drawings
图1为背景技术中通信场景示意图;FIG. 1 is a schematic diagram of a communication scene in the background technology;
图2为本发明实施例传输广播信道的方法流程示意图;FIG. 2 is a schematic flowchart of a method for transmitting a broadcast channel according to an embodiment of the present invention;
图3A为本发明实施例划分时间段的示意图;FIG. 3A is a schematic diagram of dividing time periods according to an embodiment of the present invention;
图3B为本发明实施例第一种预定义资源上广播信道数据分段资源映射示意图;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;
图3C为本发明实施例第二种预定义资源上广播信道数据分段资源映射示意图;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;
图4为本发明实施例采用扩频发送广播信道的框图;FIG. 4 is a block diagram of an embodiment of the present invention that uses spread spectrum to send a broadcast channel;
图5为本发明实施例采用扩频接收广播信道的框图;FIG. 5 is a block diagram of receiving a broadcast channel using spread spectrum according to an embodiment of the present invention;
图6为本发明实施例广播信道在一个时间段内的映射示意图;FIG. 6 is a schematic diagram of mapping a broadcast channel within a time period according to an embodiment of the present invention;
图7为本发明实施例SFN通过CRC(Cyclic Redundancy Check,循环冗余校验比特)扰码指示的示意图;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;
图8A为本发明实施例第一种映射方式示意图;FIG. 8A is a schematic diagram of a first mapping method according to an embodiment of the present invention;
图8B为本发明实施例第二种映射方式示意图;FIG. 8B is a schematic diagram of a second mapping method according to an embodiment of the present invention;
图8C为本发明实施例第三种映射方式示意图;FIG. 8C is a schematic diagram of a third mapping method according to an embodiment of the present invention;
图9为本发明实施例发送广播信道的方法流程示意图;FIG. 9 is a schematic flowchart of a method for sending a broadcast channel according to an embodiment of the present invention;
图10为本发明实施例接收广播信道的方法流程示意图;FIG. 10 is a schematic flowchart of a method for receiving a broadcast channel according to an embodiment of the present invention;
图11为本发明实施例传输广播信道的系统流程示意图;FIG. 11 is a schematic flow diagram of a system for transmitting a broadcast channel according to an embodiment of the present invention;
图12为本发明实施例第一种发送广播信道的网络侧设备的结构示意图;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;
图13为本发明实施例第一种接收广播信道的用户设备的结构示意图;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;
图14为本发明实施例第二种发送广播信道的网络侧设备的结构示意图;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;
图15为本发明实施例第二种接收广播信道的用户设备的结构示意图。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.
具体实施方式Detailed ways
本发明实施例网络侧设备在周期内的至少一个时间段中需要承载广播信道的无线帧上向用户设备发送广播信道,以使用户设备确定承载广播信道的时间段中的无线帧对应的系统帧号,其中周期内的每个时间段中的每个无线帧对应一个不同的系统帧号,广播信道中承载的信息不包含系统帧号。由于本发明实施例网络侧设备对广播信道中承载的信息进行扩频处理后发送,接收端会获得扩频增益,相当于提高了接收端的接收信号功率。使得传输广播信道得到了增强。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.
其中,本发明实施例广播信道中承载的信息与现有的广播信道中承载的信息不同和/或与现有的广播信道映射的资源位置不同,所以针对本发明实施例的广播信道可以用与现有广播信道不同的表达方式,比如xPBCH等。为了方便描述后续文中出现的广播信道如果没有特殊说明都是本发明实施例的广播信道,不再重解释。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.
在下面的说明过程中,先从网络侧和用户设备侧的配合实施进行说明,最后分别从网络侧与用户设备侧的实施进行说明,但这并不意味着二者必须配合实施,实际上,当网络侧与用户设备侧分开实施时,也解决了分别在网络侧、用户设备侧所存在的问题,只是二者结合使用时,会获得更好的技术效果。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.
如图2所示,本发明实施例传输广播信道的方法包括下列步骤:As shown in Figure 2, the method for transmitting a broadcast channel according to an embodiment of the present invention includes the following steps:
步骤201、网络侧设备确定时间段中需要承载广播信道的无线帧;Step 201, the network side device determines the wireless frame that needs to carry the broadcast channel in the time period;
步骤202、网络侧设备对广播信道中承载的信息进行扩频处理后,在确定的无线帧上向用户设备发送广播信道;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;
步骤203、用户设备以当前无线帧的起点时刻接收广播信道,并对广播信道中承载的信息进行检测;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;
步骤204、用户设备对检测到的广播信道中承载的信息进行解扩频处理。Step 204, the user equipment performs despreading processing on the detected information carried in the broadcast channel.
在实施中,网络侧设备和用户设备对于广播信道的资源映射方式的理解都相同,比如可以在协议中规定广播信道的资源映射方式,也可以由网络侧通知用户设备广播信道的资源映射方式。然后网络侧设备根据广播信道的资源映射方式向用户设备发送广播信道;相应的,用户设备采用相同的广播信道的资源映射方式进行检测。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.
本发明实施例将一个周期内的所有无线帧划分成多个时间段,所有时间段包含的无线帧数量可以全部相同、部分相同或全不相同。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.
周期内每个无线帧对应一个系统帧号,不同的无线帧对应的系统帧号不同。只要能让用户设备知道承载广播信道的无线帧,用户设备就可以确定对应的系统帧号,这样在广播信道中承载的信息就可以不包括系统帧号。由于广播信道中承载的信息的比特数减少了,这样广播信道的传输就得到了增强。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.
用户设备在检测到广播信道后并不知道是哪个时间段中的哪个无线帧承载广播信道,这时就需要将承载广播信道的无线帧所属的时间段通知给用户设备,然后用户设备再根据时间段和承载广播信道的无线帧的对应关系,就可以准确确定承载广播信道的无线帧。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.
其中,时间段和承载广播信道的无线帧的对应关系可以预先在协议中规定,也可以由网络侧通知用户设备。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.
对于时间段和承载广播信道的无线帧的对应关系,较佳地一种方式是每个时间段承载广播信道的无线帧都相同。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.
例如对于扩频后的序列映射在时间段内预定义的资源位置上(即承载广播信道的无线帧)。预定义的资源位置为每个时间段内从第三个无线帧开始连续的12个无线帧内(初步估算需要的总的资源数)。当然预定义资源的个数也需要由扩频后的序列的长度决定,较佳地预定义资源的个数不小于序列的长度。较佳地,广播信道在一个时间段(128个无线帧)内的资源映射方式是固定的,图3A仅是本发明方案的一个实施例,即映射在每个时间段内从第三个无线帧开始,每个无线帧内的每个子帧都发送,在每个子帧内,映射在第二个时隙内的前4个OFDM符号,即图3B所示;也可以采用如图3C所示方式映射;也可以是两种方式的映射的结合。也可以在每个无线帧内映射,在每个无线帧内仅映射在一个子帧内,子帧的位置可以是10个子帧内的任何一个,在一个子帧内的映射可以是如图3B或图3C所示方式,也可以是两种方式的结合。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.
对于承载广播信道的无线帧所属的时间段通知给用户设备的方式有很多种,即可以显示通知,也可以隐式通知。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.
比如图3A所示,将1024个无线帧(即一个周期)分成8个时间段,每个时间段包含128个无线帧,并对应一个系统帧号区间。其中,第一个时间段包含128个无线帧,对应的系统帧号分别从系统帧号0~系统帧号127,第五个时间段也包含128个无线帧,对应的系统帧号分别从系统帧号639~系统帧号767。这样,如果用户设备检测出广播信道在哪个时间段的哪个帧发送,就从而可以判断出系统帧号。广播信道可以在任何一个时间段,或者几个时间段内发送,也可以在每个时间段内发送。如果在每个时间段内都发送,用户设备在获得广播信道之前所做的检测次数少,获得广播信道所需要的时间更短,但是占用的资源更多。如果仅在一个时间段内发送,用户设备由于不知道发送的具体位置,会不停的检测,直到检测出广播信道为止。比如图3A中,如果广播信道仅在第一个时间段内发送,用户设备从第二个时间段内开始检测,直到下个周期的第一个时间段,才有可能检测到广播信道。因此,在这种情况下,用户设备的检测次数多,检测到广播信道所需要的时间长。优点是,不需要在每个时间段内都发送,发送广播信道占用的下行资源少。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.
较佳地,本发明实施例的一个周期中包括的无线帧的数量等于SFN能够表示的最大值,比如上面例子中,SFN从0~1023,SFN能够表示的最大值为1024,则一个周期中包括1024个无线帧,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,
在发送端,网络侧设备确定需要承载广播信道的时间段中的无线帧时,针对一个时间段,网络侧设备根据时间段和无线帧的对应关系,将该时间段对应无线帧作为该时间段中需要承载广播信道的无线帧;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;
相应的,用户设备根据时间段和无线帧的对应关系,确定检测到广播信道的时间段对应的无线帧为承载广播信道的无线帧;根据承载广播信道的无线帧和承载广播信道的无线帧所属的时间段,确定系统帧号。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.
比如用户设备检测到广播信道后,无法知道承载广播信道的无线帧的系统帧号,在用户设备知道时间段1收到广播信道后,就可以根据时间段和承载广播信道的无线帧的对应关系,确定时间段1对应的承载广播信道的无线帧为无线帧3,则用户设备就将检测到广播信道时的无线帧作为无线帧3。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.
其中,用户设备确定哪个时间段收到广播信道的方式有很多,下面列举几种。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.
实施例一、通过特定序列隐式通知。Embodiment 1. Implicit notification through a specific sequence.
网络侧设备采用时间段对应的特定序列对广播信道中承载的信息进行扩频处理;其中,周期内的每个时间段对应不同的特定序列,然后在需要承载广播信道的无线帧上,向用户设备发送采用确定的无线帧所在的时间段对应的特定序列进行扩频后的广播信道中承载的信息。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.
相应的,用户设备根据时间段和特定序列的对应关系,确定对检测到的广播信道中承载的信息进行解扩频处理时,采用的特定序列对应的时间段为承载广播信道的无线帧所属的时间段。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.
这里的特定序列可以是扩频序列或其他具体满足正交性的序列。例如:满足正交性的序列包括:扩频序列、ZC序列等。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.
该实施例中,每一个时间段对应一个特定序列,不同时间段对应不同的特定序列。In this embodiment, each time period corresponds to a specific sequence, and different time periods correspond to different specific sequences.
比如对于时间段1中承载的广播信道,网络侧设备采用时间段1对应的特定序列对广播信道进行扩频;这样用户设备再用特定序列解扩频后,根据时间段和特定序列的对应关系就可以确定解扩频所用的特定序列对应的时间段,然后就知道检测到广播信道的时间段是哪个时间段。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.
时间段和特定序列的对应关系可以在协议中规定,也可以由网络侧通知用户设备。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.
在不同时间段内发送的广播信道使用不同的特定序列进行扩频,也就是在每个时间段内用于扩频的特定序列彼此之间是正交的。扩频因子没有限制,需要满足扩频增益。例如广播信道需要增强11~12dB的性能,此时要求扩频因子(这里特定序列的长度即扩频因子。例如扩频序列为1101,长度为4,那么扩频因子就是4)至少为128,而且需要满足正交性的序列的个数足够用于区分不同的时间段。例如扩频因子使用128,并从扩频因子为128的特定序列中选择互相关性较好的8个序列分别用于区分8个时间段内发送的广播信道。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.
使用扩频本发明实施例:一方面可以获得扩频增益,增强广播信道的传输;另一方面,可以隐式获得系统帧号。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.
在实施中,本发明实施例网络侧设备在发送广播信道时,可以在对原始信息流进行信道编码之后,在对广播信道进行资源映射之前,对广播信道上承载的信息进行扩频处理,其中原始信息流是指承载在广播信道上的原始信息后面添加循环冗余校验比特后形成的信息流。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.
相应的,用户设备在进行资源解映射之后,进行信道译码之前,采用特定序列对广播信道上承载的信息进行解扩频处理。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.
比如图4所示,在卷积编码之后和速率匹配之前进行扩频。当然,图3A只是一个实施例。其他实施例还可以包括:在速率匹配之后,调制之前扩频;在调制之后,资源映射之前扩频。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.
相应的,扩频的位置不同,解扩频的位置也不同。图5中,解扩频的位置与图4相对应,即在解速率匹配之后,在卷积编码译码之前进行解扩频。其他实施例还可以包括:在解调制之后,解速率匹配之前解扩频;在解资源映射之后,在解调制之前解扩频。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.
图4和图5中,每个时间段内发送和接收时,广播信道承载的信息包括下行系统带宽和/或包含下行混合自动重传指示信道的配置信息,不包含系统帧号。系统帧号通过广播信道在哪个时间段内检测出来而隐式获得。广播信道承载的信息添加CRC校验比特,CRC校验比特上同时可以继续添加天线扰码,用于区分网络侧设备的发射天线配置信息。添加CRC校验后的信息经过咬尾卷积码编码。对编码后的比特流进行扩频,使用的扩频码和在哪个时间段内发送有关。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.
其中,本发明实施例在每个时间段内具体的广播信道的资源映射方式,以图4和图5所示为例:经过编码后的信息比特序列(如果是放在速率匹配后,可以称为是经过速率匹配后的序列)为c1,c2,...,cn,特定序列为k1,k2,...,kK,其中K=128,即如果扩频因子为128,则这里特定序列的长度就是128.那么经过扩频后的序列即为c1k1,c1k2,...,c1kK,c2k1,c2k2,...,c2kK,...,cnk1,cnk2,...,cnkK,计算可用的资源单元数量,然后对扩频后的序列进行速率匹配(如果扩频发生在速率匹配后,则直接进入下一步调制及资源映射)。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).
在确定可用的资源单元数量时:如图3B和图3C所示为广播信道在一个子帧的资源映射图。先确定频域上PRB(Physical Resource Block,物理资源块)的数量,再确定需要占用的无线帧的数量,再确定需要占用的一个无线帧内子帧的数量,然后确定每个子帧内占用的符号的数量,去除已知的已经占用的RE(Resource Element,资源单元)的数量(比如CRC占用的RE),那么剩余的RE就可以用来映射广播信道。例如,如果广播信道也映射在载波中心的6个PRB中,占用每个无线帧,并占用每个无线帧的每个子帧(不包含第一个子帧,因为已经被现有的广播信道占用),在每个子帧中仍然使用4个OFDM符号如图3B和图3C,那么可用的资源位置就是图3B或图3C中广播信道占用的RE(去除了CRC占用的RE)。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).
具体映射到资源位置上时的顺序是,先按频域,再按照符号,再按照子帧,最后按照无线帧。从扩频后序列(或者是速率匹配后的序列)的角度来看,本发明实施例网络侧设备对广播信道上承载的信息进行扩频处理有三种方式: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:
方式一,如图8A所示:Method 1, as shown in Figure 8A:
c1k1,c1k2,...,c1kK,c2k1,c2k2,...,c2kK,...,cnk1,cnk2,...,cnkK。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 .
即,网络侧设备将广播信道上承载的信息中的每一个信息位依次与特定序列相乘或模2加。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.
方式二,如图8B所示:Method 2, as shown in Figure 8B:
c1k1,c2k1,...,cnk1,c1k2,c2k2,...,cnk2,...,c1kK,c2kK,...,cnkK 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
即,网络侧设备将广播信道上承载的信息依次与特定序列中的每一位相乘或模2加。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.
方式三,如图8C所示,是前两种方式的结合:Method 3, as shown in FIG. 8C , is a combination of the first two methods:
网络侧设备按照特定序列中每段子序列的顺序,将广播信道上承载的信息与每个子序列进行第一乘积处理或第二乘积处理;其中,第一乘积处理是将广播信道上承载的信息中的每一个信息位分别与子序列相乘或模2加;第二乘积处理是将广播信道上承载的信息分别与子序列中的每一位相乘或模2加。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.
在实施中,首先将扩频序列分为几段。例如扩频因子为128的序列可以分为两段。在信息块经过每一段扩频序列扩频内的映射可以是图8A和图8B两种的任意一种。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.
对于哪段用哪种方式可以在协议中规定,或者由网络侧通知用户设备。Which method to use for which segment can be specified in the protocol, or the network side notifies the user equipment.
比如,将特定序列分成两段序列(例如将k1,k2,k3.....,k64分成一段序列,将k65,k66,k67.....,k128分成一段序列,均分特定序列是指一种较佳方式,也可以不均分),第一段序列采用图8A方式,第二段序列采用图8B方式,则网络侧设备将广播信道上承载的信息中的每一个信息位分别与特定序列中的第一段序列相乘或模2加作为第一段扩频后的信息块,将广播信道上承载的信息依次与特定序列中的第二段序列的每一位相乘或模2加作为第二段扩频后的信息块;或者第一段序列和第二段序列均采用图8A方式,则网络侧设备将广播信道上承载的信息中的每一个信息位分别与特定序列中的第一段序列相乘或模2加作为第一段扩频后的信息块,将广播信道上承载的信息中的每一个信息位分别与特定序列中的第二段序列相乘或模2加作为第二段扩频后的信息块;或者第一段序列和第二段序列均采用图8B方式,则网络侧设备将广播信道上承载的信息依次与特定序列中的第一段序列的每一位相乘或模2加作为第一段扩频后的信息块,将广播信道上承载的信息依次与特定序列中的第二段序列的每一位相乘或模2加作为第二段扩频后的信息块;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;
针对本发明实施例的扩频方式,本发明实施例用户设备根据下列方式确定进行解扩频处理时采用的特定序列: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:
用户设备以当前无线帧的起点时刻开始,按照广播信道的资源映射方式接收广播信道;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;
用户设备将当前接收窗内的广播信道中的至少一个码字与每个特定序列进行相关运算,确定与每个特定序列对应的相关值;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;
若一个码字分别与每个特定序列进行相关运算,从大于设定门限值的相关值中选择最大的前N个相关值对应的特定序列作为进行解扩频处理时采用的特定序列,N为正整数;在确定的所有相关值中没有大于设定门限值的相关值时,将下一接收窗作为当前接收窗,并返回将当前接收窗内的广播信道中的至少一个码字与每个特定序列进行相关运算,确定每个特定序列对应的相关值的步骤;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;
若多个码字分别与每个特定序列进行相关运算,从大于设定门限值的相关值中选择相关值最大的前M次相关值对应的特定序列作为进行解扩频处理时采用的特定序列,M为正整数;在确定的所有相关值中没有大于设定门限值的相关值时,将下一接收窗作为当前接收窗,并返回将当前接收窗内的广播信道中的至少一个码字与每个特定序列进行相关运算,确定每个特定序列对应的相关值的步骤;其中,一个码字分别与每个特定序列进行相关运算,得到的每个特定序列对应的相关值中相关值最大的特定序列为一次相关值最大的特定序列。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.
比如有码字1、码字2和码字3,特定序列1、特定序列2和特定序列3;码字1分别与特定序列1、特定序列2和特定序列3进行相关运算,得到三个相关值中最大的相关值为A,对应特定序列2;码字2分别与特定序列1、特定序列2和特定序列3进行相关运算,得到三个相关值中最大的相关值为B,对应特定序列2;码字3分别于特定序列1、特定序列2和特定序列3进行相关运算,得到三个相关值中最大的相关值为C,对应特定序列1,则特定序列2是有两次相关值最大的特定序列,特定序列1是有一次相关值最大的特定序列。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.
如果特定序列2对应的最大的相关值A和B中有大于门限值的,特定序列1对应的最大的相关值C大于门限值;若M为1,则选择特定序列2为进行解扩频处理时采用的特定序列;若M为2,则选择特定序列2和特定序列1为进行解扩频处理时采用的特定序列。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.
在实施中,用户设备可以仅拿出一个码字和每个特定序列作相关运算,也可以拿出2或多个码字和每个特定序列做相关运算。无论是几个码字,最后做完相关运算后,理论上超过门限的或者相关值最大的应该是同一个序列。但由于有噪声的影响,可能导致不是每个码字和特定序列做完相关后,相关值最大的都是同一个特定序列。所以较佳地是多个码字分别与每个特定序列进行相关:比如拿出若干个码字,每个码字都和每个特定序列作相关运算,确定出相关值最大出现的次数最多的特定序列作为进行解扩频处理时采用的特定序列。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.
在实施中,当用户设备仅用一个码字和每个特定序列作相关运算时,如果存在多个相关值大于设定门限的情况,将这些相关值从大到小依次排序,并选择前若干个相关值对应的特定序列组成一个特定序列组,并将该特定序列组中的每个特定序列作为进行解扩频处理时采用的候选特定序列。或者当用户设备使用多个码字分别与每个特定序列进行相关运算,将相关值为最大相关值时的次数按从大到小进行排序,并选择出大于设定门限的相关值,然后从中选择前若干个相关值对应的特定序列组成一个特定序列组,并将该特定序列组中的每个特定序列作为进行解扩频处理时采用的候选特定序列。选择的个数和UE的实现复杂度有关系,选择的越多,用户设备实现越复杂,但是检测到广播信道的准确性更高,可以防止广播信道漏检的现象。选择出的前若干个相关值,虽然这些相关值都超过了门限,但是发送端仅采用了一个特定序列进行的扩频,该特定序列只可能是该特定序列组中的一个特定序列。用户设备可以从特定序列组中依次选取一个特定序列作为进行解扩频处理时采用的特定序列,并进行译码,以及CRC校验。如果CRC校验成功,说明广播信道已经成功检测到,且不再使用特定序列组中的其他特定序列进行解扩频,译码,以及CRC校验;如果CRC校验失败,则按特定序列组中特定序列的顺序选择下一次特定序列作为解扩频处理时采用的特定序列,并进行译码,以及CRC校验,并判断CRC校验是否成功。不断重复该过程,直到CRC校验成功。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.
以图6为例。用户设备当前从T1时刻开始缓存12个无线帧内预定义资源位置上的数据,并尝试解扩频,T1时刻开始的接收窗内(这里的接收窗的长度要保证能将一个时间段内映射的广播信道的资源都能接收到)的数据尝试所有的扩频码字后(区分8个时间段共有8个扩频码字),和预定义的门限比较,可能所有的相关值都在门限以下,因此也不用尝试译码就可以判断此时接收窗内的数据并非真正发送的广播信道。用户设备将接收窗口滑动到T2时刻,尝试解扩频,有可能存在相关值超过门限的情况,此时可以初判断广播信道可能存在,并尝试译码,如果不会通过CRC校验(由于真实的广播信道是从T3时刻开始的,从T2时刻接收到的信息不是完全的广播信道,会有些原始信息漏掉,所以CRC就会校验不通过);用户设备继续滑动窗口至T3时刻,选择相关值最大的扩频码字,并译码,CRC校验正确后,获得承载的信息,此时由特定序列对应的时间段可以获得系统帧号的区间,由T3时刻可以确定是这个区间中第三个系统帧,由此可以确定出具体的系统帧号值。如果用户设备在一个时间段内仍无法完成正确译码,则可以尝试合并检测两个时间段内的广播信道。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.
较佳地,选择特定序列时,可以选择在时间不对齐的情况下相关值比较低的序列作为特定序列。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.
本发明实施例将1024个无线帧进行了时间分段,分的时间段越多,广播信道发送的次数越多。如果每个无线帧都用于发送广播信道,本发明实施例的方案最多经过12次检测就可以。更关键的是,本发明实施例的方案每次检测时,先解扩频并和门限比,如果低于门限,就认为没有广播信道。如果高于门限,才进一步译码并CRC校验,通过门限的限制,可以避免每次检测必须完成CRC校验,从而降低了用户设备检测的复杂度。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.
针对网络侧设备对广播信道上承载的信息进行扩频处理有三种方式,用户设备将当前接收窗内的广播信道中的至少一个码字与每个特定序列进行相关时,也有对应的三种方式。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. .
下面以一个码字与一个特定序列进行相关运算,为例进行说明。In the following, a correlation operation between a codeword and a specific sequence is taken as an example for illustration.
针对方式一,用户设备直接将一个码字与一个特定序列作相关运算。For the first method, the user equipment directly performs a correlation operation between a codeword and a specific sequence.
以图4为例,比如原始信息比特是1,特定序列是1101,那么网络侧设备扩频完就是1101,这4个比特连起来称为一个码字。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.
那么用户设备在接收端解扩频时,需要拿这个码字和扩频序列模2加。也就是拿1101这个码字和扩频序列1101对应模2加,然后求和,结果就是4,即相关值是4。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.
本发明实施例扩频的具体实现方法有两种:如果是对调制后的符号做扩频,那么是原始的信息符号和扩频序列作相乘运算,信息位指的是调制后的符号。如果是对调制前的信息比特做扩频,那么是原始的信息比特和扩频序列作模2加运算,信息位指的是信息比特。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.
由于图4是对调制前的信息比特做扩频,因此这里举例说明时是模2加运算,并不代表本发明实施例只能用模2加运算。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.
这种方式下,类似图7所示,用户设备通过扩频后的第一个码字就可以判断是否需要进一步检测该接收窗内的广播信道:通过扩频后的第一个码字和本地扩频序列作相关运算,并和门限比较,如果不超过门限,则继续滑动接收窗,进行下一次尝试检测,如果超过了门限,则尝试译码并CRC校验。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.
针对方式二,用户设备按照广播信道的资源映射方式,从每个信息块中取出一个信息位组成一个码字,将该码字与每个特定序列作相关运算。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.
比如:原始信息比特为101,扩频序列为1101,扩频的过程是,将原始信息比特依次于扩频序列的每位比特做模2加运算。扩频后形成的信息块为101,101,010,101。发端在资源映射时就按照信息块的比特(或者是对信息块调制后的符号)顺序依次映射。接收端按照广播信道的资源映射方式获得扩频后形成的信息块,并抽取每个信息块中对应的比特形成一个码字,将该码字与每个特定序列作相关运算。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.
例如抽取每个信息块中对应的第一位比特出来,可以组成码字1101;抽取每个信息块中对应的第二位比特出来,可以组成码字0010;抽取每个信息块中对应的第三位比特出来,可以组成码字1101。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.
这种方式下,用户设备需要在每个信息块选出对应的一个比特出来组成一个码字,该码字就表示同一个信息比特被一个扩频序列扩频,然后和本地扩频序列作相关运算,然后和门限比较,如果不超过门限,则继续滑动接收窗,进行下一次尝试检测,如果超过了门限,则尝试译码并CRC校验。这种映射的方式的好处是,用户设备可以通过前m个经过m个扩频比特扩频后的信息块就可以检测出来,没有必要一定要将所有的信息块收集完再解扩频、译码、CRC校验。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.
针对方式三,用户设备按照一个特定序列中每段子序列的顺序,将一个码子与至少一个子序列进行第三相关处理或第四相关处理;其中,第三相关处理是将一个码字直接与至少一个子序列作相关运算,第四相关处理是按照广播信道的资源映射方式,从每个信息块中取出一个信息位组成一个码字,将该码字与至少一个子序列作相关运算。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.
针对方式三,用户设备可以用特定序列的所有子序列,也可以用部分子序列。如果用所有子序列,由于使用所有子序列,扩频因子大,从而可以得到更高的扩频增益,但是计算量比较大,相反的部分子序列,扩频因子小,得到的扩频增益也有限,但是计算量比较小,所以可以根据需要选择扩频因子大的还是小的子序列。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.
实施例二、通过特定序列隐式通知。Embodiment 2: Implicit notification through a specific sequence.
在实施例一中,广播信道中承载的信息中包含下行系统带宽和/或下行混合自动重传指示信道的配置信息,不包含系统帧号。在实施例二中,广播信道中承载的信息包含下行带宽指示信息和/或下行混合自动重传指示信道的配置信息,且包括系统信息;或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
广播信道中承载的信息中包括系统信息;或the information carried on the broadcast channel includes system information; or
广播信道中不承载任何信息,即广播信道中承载的信息是空信息。The broadcast channel does not carry any information, that is, the information carried in the broadcast channel is empty information.
目前LTE系统中,系统信息是当用户设备获得广播信道后在PDSCH(Physical Downlink Shared Channel,下行物理共享信道)上调度的信息。需要用户设备检测下行控制信道PDCCH或增强的下行控制信道EPDCCH,然后获得PDSCH的调度信息,然后在PDSCH上检测系统信息。系统信息相当于一个容器,它可以承载具有不同调度周期的SIB(System Information Block,系统信息块)。目前LTE系统可以支持从SIB1到SIB12。但对于某些用户设备,比如超级用户设备(这里的超级用户设备就是需要在覆盖增强的环境下工作的设备,由于本发明实施例的覆盖增强了,所有本发明实施例的用户设备可以在地下室等需要覆盖增强的环境下工作,相比普通用户设备的“能力更强”,因此本文中用“超级用户设备”命名),可能仅需要SIB1,SIB2,而且这两个SIB中的某些比特指示的信息对某些用户设备来讲也是不需要的。因此,可以将SIB1以及SIB2或者其他可能需要的SIB信息中的比特整合在一起,由广播信道来承载,或者结合广播信道中原来承载的信息一起承载。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.
实施例二和实施例一的区别就在于,两个实施例下,物理信道承载的信息的比特数发生了变化。对应需要的扩频因子的大小可能不同,在一个时间段内需要映射的资源数据量在实施例二中变的更多。或者也有可能1024个无线帧分成的时间段的数量变小,一个时间段内包含的无线帧数量变大。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.
实施例二的其他处理过程与实施例一相同,在此不再赘述。The other processing procedures of the second embodiment are the same as those of the first embodiment, and will not be repeated here.
实施例三、通过CRC的扰码隐式通知,即广播信道中承载的信息包括采用用于指示需要承载广播信道的无线帧所在的时间段的特定扰码加扰的CRC。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.
网络侧设备将采用用于指示需要承载广播信道的无线帧所在的时间段的特定扰码加扰的CRC置于广播信道中承载的信息,在需要承载广播信道的无线帧上向用户设备发送。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.
相应的,用户设备根据对检测到的广播信道中承载的信息中的CRC上加扰的用于指示需要承载广播信道的无线帧所在的时间段的特定扰码,确定承载广播信道的无线帧所属的时间段。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.
其中,广播信道中承载的信息中的CRC是由原始CRC经过加扰得到的。Wherein, the CRC in the information carried in the broadcast channel is obtained by scrambling the original CRC.
原始CRC是根据广播信道中承载的信息计算得到的。The original CRC is calculated from the information carried in the broadcast channel.
在实施中,网络侧设备可以仅采用特定扰码加扰原始CRC,得到广播信道中承载的信息中的CRC;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;
网络侧设备还可以采用特定扰码以及用于指示基站发射天线端口的扰码加扰原始CRC,得到广播信道中承载的信息中的CRC。其中特定扰码和用于指示基站发射天线端口的扰码的加扰顺序可以根据需要,可以先采用特定扰码加扰原始CRC,然后再采用用于指示基站发射天线端口的扰码加扰;还可以先采用用于指示基站发射天线端口的扰码加扰原始CRC,然后再采用特定扰码加扰。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.
实施例三中广播信道中承载的信息除了CRC之外,还可以包括:In addition to the CRC, the information carried on the broadcast channel in Embodiment 3 may also include:
广播信道中承载的信息包含下行带宽指示信息和/或下行混合自动重传指示信道的配置信息;或The information carried on the broadcast channel includes downlink bandwidth indication information and/or configuration information of the downlink HARQ indication channel; or
广播信道中承载的信息包含下行带宽指示信息和/或下行混合自动重传指示信道的配置信息,且包括系统信息;或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
广播信道中承载的信息中包括系统信息。The information carried on the broadcast channel includes system information.
该实施例中,每一个时间段对应一个扰码,不同时间段对应不同的扰码。In this embodiment, each time period corresponds to a scrambling code, and different time periods correspond to different scrambling codes.
比如对于时间段1中的需要发送的广播信道,网络侧设备在广播信道承载的信息中包含时间段1对应的扰码加扰的CRC;这样用户设备再用扰码解扰该CRC后,根据时间段和扰码的对应关系就可以确定加扰该CRC的扰码对应的时间段,然后就知道检测到广播信道的时间段是哪个时间段。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.
时间段和扰码的对应关系可以在协议中规定,也可以由网络侧通知用户设备。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.
以图7为例,将1024个无线帧分成若干个时间段,例如仍然分成8个时间段。广播信道可以在8个中任意一个或者若干个时间段内发送。在不同的时间内发送时,CRC会被不同的扰码加扰。广播信道承载的原始信息比特序列为a0,a1,a2...,aA-1,其中A是信息比特的长度,例如广播信道承载的原始信息仅包含3比特下行带宽指示,3比特下行混合自动重传指示信道的配置信息,以及10比特的空闲比特时,那么A=16,在原始信息比特序列之后会添加CRC校验比特p0,p1,p2,p3,...,pL-1,例如添加16比特的CRC序列时L=16,CRC会被用于指示时间段扰码的加扰,例如在第一个时间段内发送的PBCH的CRC中被加扰的扰码为表格1中对应的时间编号为0的扰码。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.
添加扰码的过程为:ck=(pk+xt,k)mod2,t=0,1,...,7;k=0,1,...,L-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.
在目前的LTE标准中,已经采用CRC被用于指示天线端口的扰码加扰。在实施例三中,这里CRC可以不被指示天线端口的扰码加扰,也可以在CRC被指示天线端口的扰码加扰的基础上再次被指示时间段的扰码加扰。当然,这里的CRC扰码仅是一个实例,原则是选出每个时间段对应一个特定的扰码即可,不同的扰码之间尽量保证扰码之间的距离越大越好(扰码之间的距离,是指两个扰码对应比特不同的数量。例如,扰码1为0000,扰码2为1111,那么两个扰码之间的距离就是4)。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).
表格1:广播信道的CRC扰码。Table 1: CRC scrambling codes for broadcast channels.
较佳地,在实施三中,在各个时间段内发送广播信道时,可以采用增强的发送模式。在进行速率匹配时可用的资源可以在1个时间段内(如128个无线帧)分配。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).
因为在一个时间段内,使用了扩频,解扩是会有扩频增益的,所以在一个时间段内可以增强覆盖。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.
对于实施三,由于用户设备不知道广播信道的具体位置,仍然会按照预设置的广播信道的资源映射方式检测,也会尝试所有可能的加扰CRC的扰码,直到CRC校验正确为止。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.
在实施中,实施例三可以与实施例一和/或实施例二和实施例三结合。即采用扩频的收发的方式的同时,采用包含时间段对应的扰码加扰的CRC,这样可以作为双重校验,让用户设备获得正确的信息。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.
当然,对于实施例三,也可以不与其他实施例结合,这样采用扩频处理的特定序列可以是与每个时间段对应的特定序列,而每个时间段对应的特定序列可以全部相同,也可以部分相同,也可以全不相同。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.
比如网络侧设备采用所述时间段对应的特定序列对广播信道中承载的信息进行扩频处理;其中,周期内的每个时间段对应相同的特定序列。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.
实施例三中,网络侧设备进行扩频处理,以及用户设备在进行解扩频处理的方式与实施例一中相同,在此不再赘述。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.
对于上述实施例三,一种较佳地方式是:如果各个时间段内使用相同的特定序列进行扩频,例如扩频因子为128,那么该扩频序列可以是128位全部为1的比特序列。用该比特序列进行扩频时,相当于对扩频前的序列进行重复映射。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.
例如原始信息比特位101,扩频序列为1111,那么扩频后就是:For example, the original information bit is 101, and the spreading sequence is 1111, then after spreading it is:
101101101101,相当于对原始信息序列101做了4次重复映射或者发送。101101101101, which is equivalent to performing repeated mapping or sending on the original information sequence 101 4 times.
上述实施例一~实施例三中,广播信道中承载的信息越少,在单位时间内能够发送的次数就越多,这样在不增加资源的前提下,可以增加发送的次数,从而提高了用户设备正确接收广播信道的概率。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.
其中,本发明实施例的网络侧设备可以是基站(比如宏基站、家庭基站等),也可以是RN(中继)设备,还可以是其它网络侧设备。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.
如图9所示,本发明实施例发送广播信道的方法包括下列步骤:As shown in Figure 9, the method for sending a broadcast channel in the embodiment of the present invention includes the following steps:
步骤901、网络侧设备确定时间段中需要承载广播信道的无线帧;Step 901, the network side device determines the wireless frame that needs to carry the broadcast channel in the time period;
步骤902、网络侧设备对广播信道中承载的信息进行扩频处理后,在确定的无线帧上向用户设备发送广播信道。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.
步骤901中,针对一个时间段,网络侧设备根据时间段和无线帧的对应关系,将该时间段对应无线帧作为该时间段中需要承载广播信道的无线帧。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.
在实施中,网络侧设备还需要通知用户设备需要承载广播信道的无线帧所属的时间段,具体的通知方式有很多种,下面列举几种: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:
方式一、通过特定序列通知。Method 1: Notify through a specific sequence.
网络侧设备采用所述时间段对应的特定序列对广播信道中承载的信息进行扩频处理;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;
其中,周期内的每个时间段对应不同的特定序列。Wherein, each time period in the cycle corresponds to a different specific sequence.
较佳地,周期内的每个时间段对应的特定序列之间正交。Preferably, the specific sequences corresponding to each time period in the period are orthogonal to each other.
方式二、通过CRC通知。Method 2: Notify through CRC.
广播信道中承载的信息包括采用用于指示需要承载广播信道的无线帧所在的时间段的特定扰码加扰的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.
较佳地,CRC为仅经过特定扰码加扰的CRC;或Preferably, the CRC is a CRC that has only been scrambled with a specific scrambling code; or
CRC为经过用于指示基站发射天线端口的扰码和特定序列加扰的CRC。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.
对于方式一和方式二,较佳地,广播信道中承载的信息包含下行带宽指示信息和/或下行混合自动重传指示信道的配置信息;或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
广播信道中承载的信息包含下行带宽指示信息和/或下行混合自动重传指示信道的配置信息,且包括系统信息;或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
广播信道中承载的信息中包括系统信息。The information carried on the broadcast channel includes system information.
对于方式一,较佳地,广播信道中不承载任何信息。For way one, preferably, the broadcast channel does not carry any information.
较佳地,网络侧设备在确定的无线帧上向用户设备发送广播信道时,网络侧设备在对原始信息流进行信道编码之后,在对广播信道进行资源映射之前,对广播信道上承载的信息进行扩频处理。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.
其中,原始信息流是指承载在广播信道上的原始信息后面添加CRC后形成的信息流。Wherein, the original information flow refers to the information flow formed by adding CRC after the original information carried on the broadcast channel.
较佳地,网络侧设备对广播信道上承载的信息进行扩频处理时,网络侧设备将广播信道上承载的信息中的每一个信息位依次与特定序列相乘或模2加;或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
网络侧设备将广播信道上承载的信息依次与特定序列中的每一位相乘或模2加;或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
网络侧设备按照特定序列中每段子序列的顺序,将广播信道上承载的信息与每个子序列进行第一乘积处理或第二乘积处理;其中,第一乘积处理是将广播信道上承载的信息中的每一个信息位依次与子序列相乘或模2加;第二乘积处理是将广播信道上承载的信息依次与子序列中的每一位相乘或模2加。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.
对于方式二,较佳地,网络侧设备采用所述时间段对应的特定序列对广播信道中承载的信息进行扩频处理;其中,周期内的每个时间段对应相同的特定序列。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.
如图10所示,本发明实施例接收广播信道的方法包括下列步骤:As shown in Figure 10, the method for receiving a broadcast channel in the embodiment of the present invention includes the following steps:
步骤1010、用户设备以当前无线帧的起点时刻接收广播信道,并对广播信道中承载的信息进行检测;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;
步骤1011、用户设备对检测到的广播信道中承载的信息进行解扩频处理。Step 1011, the user equipment performs despreading processing on the detected information carried in the broadcast channel.
较佳地,用户设备以当前无线帧的起点时刻接收广播信道,并对广播信道中承载的信息进行检测之后,还可以根据时间段和无线帧的对应关系,确定检测到广播信道的时间段对应的无线帧为承载广播信道的无线帧;根据承载广播信道的无线帧和承载广播信道的无线帧所属的时间段,确定系统帧号。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.
其中,用户设备确定承载广播信道的无线帧所属的时间段的方式有很多,下面列举几种: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:
方式一、通过特定序列确定。Method 1: Determine through a specific sequence.
用户设备根据时间段和特定序列的对应关系,确定对检测到的广播信道中承载的信息进行解扩频处理时,采用的特定序列对应的时间段为承载广播信道的无线帧所属的时间段。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.
方式二、通过CRC确定。Method 2: Determine through CRC.
用户设备根据对检测到的广播信道中承载的信息中的CRC上加扰的用于指示需要承载广播信道的无线帧所在的时间段的特定扰码,确定承载广播信道的无线帧所属的时间段。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 .
较佳地,CRC为仅经过特定扰码加扰的CRC;或Preferably, the CRC is a CRC that has only been scrambled with a specific scrambling code; or
CRC为经过用于指示基站发射天线端口的扰码和特定序列加扰的CRC。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.
对于方式一和方式二,较佳地,广播信道中承载的信息包含下行带宽指示信息和/或下行混合自动重传指示信道的配置信息;或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
广播信道中承载的信息包含下行带宽指示信息和/或下行混合自动重传指示信道的配置信息,且包括系统信息;或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
广播信道中承载的信息中包括系统信息。The information carried on the broadcast channel includes system information.
对于方式一,较佳地,广播信道中不承载任何信息。For way one, preferably, the broadcast channel does not carry any information.
较佳地,用户设备对广播信道上承载的信息进行解扩频处理,还包括:Preferably, the user equipment performs despreading processing on the information carried on the broadcast channel, which also includes:
用户设备在进行资源解映射之后,进行信道译码之前,采用特定序列对广播信道上承载的信息进行解扩频处理。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.
较佳地,用户设备根据下列方式确定进行解扩频处理时采用的特定序列:Preferably, the user equipment determines the specific sequence used when performing despreading processing according to the following method:
用户设备以当前无线帧的起点时刻开始,按照广播信道的资源映射方式接收广播信道;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;
用户设备将当前接收窗内的广播信道中的至少一个码字与每个特定序列进行相关运算,确定与每个特定序列对应的相关值;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;
若一个码字分别与每个特定序列进行相关运算,从大于设定门限值的相关值中选择最大的前N个相关值对应的特定序列作为进行解扩频处理时采用的特定序列,N为正整数;在确定的所有相关值中没有大于设定门限值的相关值时,将下一接收窗作为当前接收窗,并返回将当前接收窗内的广播信道中的至少一个码字与每个特定序列进行相关运算,确定每个特定序列对应的相关值的步骤;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;
若多个码字分别与每个特定序列进行相关运算,从大于设定门限值的相关值中选择相关值最大的前M次相关值对应的特定序列作为进行解扩频处理时采用的特定序列,M为正整数;在确定的所有相关值中没有大于设定门限值的相关值时,将下一接收窗作为当前接收窗,并返回将当前接收窗内的广播信道中的至少一个码字与每个特定序列进行相关运算,确定每个特定序列对应的相关值的步骤;其中,一个码字分别与每个特定序列进行相关运算,得到的每个特定序列对应的相关值中相关值最大的特定序列为一次相关值最大的特定序列。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.
可选地,当用户设备仅用一个码字和每个特定序列作相关运算时,如果存在多个相关值大于设定门限的情况,将这些相关值从大到小依次排序,并选择前若干个相关值对应的特定序列组成一个特定序列组,并将该特定序列组中的每个特定序列作为进行解扩频处理时采用的候选特定序列。或者当用户设备使用多个码字分别与每个特定序列进行相关运算,将相关值为最大相关值时的次数按从大到小进行排序,并选择出大于设定门限的相关值,然后从中选择前若干个相关值对应的特定序列组成一个特定序列组,并将该特定序列组中的每个特定序列作为进行解扩频处理时采用的候选特定序列。选择的个数和UE的实现复杂度有关系,选择的越多,用户设备实现越复杂,但是检测到广播信道的准确性更高,可以防止广播信道漏检的现象。选择出的前若干个相关值,虽然这些相关值都超过了门限,但是发送端仅采用了一个特定序列进行的扩频,该特定序列只可能是该特定序列组中的一个特定序列。用户设备可以从特定序列组中依次选取一个特定序列作为进行解扩频处理时采用的特定序列,并进行译码,以及CRC校验。如果CRC校验成功,说明广播信道已经成功检测到,且不再使用特定序列组中的其他特定序列进行解扩频,译码,以及CRC校验;如果CRC校验失败,则按特定序列组中特定序列的顺序选择下一次特定序列作为解扩频处理时采用的特定序列,并进行译码,以及CRC校验,并判断CRC校验是否成功。不断重复该过程,直到CRC校验成功。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.
较佳地,用户设备根据下列方式将当前接收窗内的广播信道中的一个码字与一个特定序列进行相关运算,包括: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:
用户设备直接将一个码字与一个特定序列作相关运算;或The UE directly correlates a codeword with a specific sequence; or
用户设备按照广播信道的资源映射方式,从每个信息块中取出一个信息位组成一个码字,将该码字与每个特定序列作相关运算;或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
用户设备按照一个特定序列中每段子序列的顺序,将一个码子与至少一个子序列进行第三相关处理或第四相关处理;其中,第三相关处理是将一个码字直接与至少一个子序列作相关运算,第四相关处理是按照广播信道的资源映射方式,从每个信息块中取出一个信息位组成一个码字,将该码字与至少一个子序列作相关运算。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.
基于同一发明构思,本发明实施例中还提供了一种传输广播信道的系统、网络侧设备和用户设备,由于与本发明实施例的方法具有相似的原理,因此这些设备的实施可以参见方法的实施,重复之处不再赘述。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.
如图11所示,本发明实施例传输广播信道的系统包括:网络侧设备1100和用户设备1110。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 .
网络侧设备1100,用于确定时间段中需要承载广播信道的无线帧;对广播信道中承载的信息进行扩频处理后,在确定的无线帧上向用户设备发送广播信道;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;
用户设备1110,用于以当前无线帧的起点时刻接收广播信道,并对广播信道中承载的信息进行检测,对检测到的广播信道中承载的信息进行解扩频处理。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.
如图12所示,本发明实施例第一种发送广播信道的网络侧设备包括:确定模块1210和发送模块1220。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 .
确定模块1210,用于确定时间段中需要承载广播信道的无线帧;A determining module 1210, configured to determine the radio frames that need to carry the broadcast channel in the time period;
发送模块1220,用于对广播信道中承载的信息进行扩频处理后,在确定的无线帧上向用户设备发送广播信道。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.
较佳地,确定模块1210具体用于:Preferably, the determining module 1210 is specifically used for:
针对一个时间段,根据时间段和无线帧的对应关系,将该时间段对应无线帧作为该时间段中需要承载广播信道的无线帧。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.
较佳地,发送模块1220具体用于:Preferably, the sending module 1220 is specifically used for:
采用所述时间段对应的特定序列对广播信道中承载的信息进行扩频处理;performing spread spectrum processing on the information carried in the broadcast channel by using a specific sequence corresponding to the time period;
其中,周期内的每个时间段对应不同的特定序列。Wherein, each time period in the cycle corresponds to a different specific sequence.
较佳地,发送模块1220具体用于:Preferably, the sending module 1220 is specifically used for:
采用所述时间段对应的特定序列对广播信道中承载的信息进行扩频处理;performing spread spectrum processing on the information carried in the broadcast channel by using a specific sequence corresponding to the time period;
其中,周期内的每个时间段对应相同的特定序列。Wherein, each time period in the cycle corresponds to the same specific sequence.
较佳地,广播信道中承载的信息包括采用用于指示需要承载广播信道的无线帧所在的时间段的特定扰码加扰的CRC。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.
较佳地,发送模块1220具体用于:Preferably, the sending module 1220 is specifically used for:
在对原始信息流进行信道编码之后,在对广播信道进行资源映射之前,对广播信道上承载的信息进行扩频处理;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;
其中,原始信息流是指承载在广播信道上的原始信息后面添加CRC后形成的信息流。Wherein, the original information flow refers to the information flow formed by adding CRC after the original information carried on the broadcast channel.
较佳地,发送模块1220具体用于:Preferably, the sending module 1220 is specifically used for:
将广播信道上承载的信息中的每一个信息位依次与特定序列相乘或模2加;或multiplying or modulo-2 adding each information bit in the information carried on the broadcast channel with a specific sequence in turn; or
将广播信道上承载的信息依次与特定序列中的每一位相乘或模2加;或Multiply or add modulo 2 the information carried on the broadcast channel to each bit in the specified sequence in turn; or
按照特定序列中每段子序列的顺序,将广播信道上承载的信息与每个子序列进行第一乘积处理或第二乘积处理;其中,第一乘积处理是将广播信道上承载的信息中的每一个信息位依次与子序列相乘或模2加;第二乘积处理是将广播信道上承载的信息依次与子序列中的每一位相乘或模2加。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.
如图13所示,本发明实施例第一种接收广播信道的用户设备包括:检测模块1310和接收模块1320。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 .
检测模块1310,用于以当前无线帧的起点时刻接收广播信道,并对广播信道中承载的信息进行检测;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;
接收模块1320,用于对检测到的广播信道中承载的信息进行解扩频处理。The receiving module 1320 is configured to perform despreading processing on the detected information carried in the broadcast channel.
较佳地,接收模块1320还用于:Preferably, the receiving module 1320 is also used for:
根据时间段和无线帧的对应关系,确定检测到广播信道的时间段对应的无线帧为承载广播信道的无线帧;根据承载广播信道的无线帧和承载广播信道的无线帧所属的时间段,确定系统帧号。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.
较佳地,接收模块1320具体用于:Preferably, the receiving module 1320 is specifically used for:
根据时间段和特定序列的对应关系,确定对检测到的广播信道中承载的信息进行解扩频处理时,采用的特定序列对应的时间段为承载广播信道的无线帧所属的时间段。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.
较佳地,接收模块1320具体用于:Preferably, the receiving module 1320 is specifically used for:
根据对检测到的广播信道中承载的信息中的CRC上加扰的用于指示需要承载广播信道的无线帧所在的时间段的特定扰码,确定承载广播信道的无线帧所属的时间段。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.
较佳地,接收模块1320还用于:Preferably, the receiving module 1320 is also used for:
在进行资源解映射之后,进行信道译码之前,采用特定序列对广播信道上承载的信息进行解扩频处理。After resource demapping and before channel decoding, a specific sequence is used to despread the information carried on the broadcast channel.
较佳地,接收模块1320还用于:Preferably, the receiving module 1320 is also used for:
以当前无线帧的起点时刻开始,按照广播信道的资源映射方式接收广播信道;将当前接收窗内的广播信道中的至少一个码字与每个特定序列进行相关运算,确定与每个特定序列对应的相关值;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;
若一个码字分别与每个特定序列进行相关运算,从大于设定门限值的相关值中选择最大的前N个相关值对应的特定序列作为进行解扩频处理时采用的特定序列,N为正整数;在确定的所有相关值中没有大于设定门限值的相关值时,将下一接收窗作为当前接收窗,并返回将当前接收窗内的广播信道中的至少一个码字与每个特定序列进行相关运算,确定每个特定序列对应的相关值的步骤;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;
若多个码字分别与每个特定序列进行相关运算,从大于设定门限值的相关值中选择相关值最大的前M次相关值对应的特定序列作为进行解扩频处理时采用的特定序列,M为正整数;在确定的所有相关值中没有大于设定门限值的相关值时,将下一接收窗作为当前接收窗,并返回将当前接收窗内的广播信道中的至少一个码字与每个特定序列进行相关运算,确定每个特定序列对应的相关值的步骤;其中,一个码字分别与每个特定序列进行相关运算,得到的每个特定序列对应的相关值中相关值最大的特定序列为一次相关值最大的特定序列。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.
可选地,当用户设备仅用一个码字和每个特定序列作相关运算时,如果存在多个相关值大于设定门限的情况,将这些相关值从大到小依次排序,并选择前若干个相关值对应的特定序列组成一个特定序列组,并将该特定序列组中的每个特定序列作为进行解扩频处理时采用的候选特定序列。或者当用户设备使用多个码字分别与每个特定序列进行相关运算,将相关值为最大相关值时的次数按从大到小进行排序,并选择出大于设定门限的相关值,然后从中选择前若干个相关值对应的特定序列组成一个特定序列组,并将该特定序列组中的每个特定序列作为进行解扩频处理时采用的候选特定序列。选择的个数和UE的实现复杂度有关系,选择的越多,用户设备实现越复杂,但是检测到广播信道的准确性更高,可以防止广播信道漏检的现象。选择出的前若干个相关值,虽然这些相关值都超过了门限,但是发送端仅采用了一个特定序列进行的扩频,该特定序列只可能是该特定序列组中的一个特定序列。用户设备可以从特定序列组中依次选取一个特定序列作为进行解扩频处理时采用的特定序列,并进行译码,以及CRC校验。如果CRC校验成功,说明广播信道已经成功检测到,且不再使用特定序列组中的其他特定序列进行解扩频,译码,以及CRC校验;如果CRC校验失败,则按特定序列组中特定序列的顺序选择下一次特定序列作为解扩频处理时采用的特定序列,并进行译码,以及CRC校验,并判断CRC校验是否成功。不断重复该过程,直到CRC校验成功。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.
较佳地,接收模块1320具体用于:Preferably, the receiving module 1320 is specifically used for:
直接将一个码字与一个特定序列作相关运算;或按照广播信道的资源映射方式,从每个信息块中取出一个信息位组成一个码字,将该码字与每个特定序列作相关运算;或按照一个特定序列中每段子序列的顺序,将一个码子与至少一个子序列进行第三相关处理或第四相关处理;其中,第三相关处理是将一个码字直接与至少一个子序列作相关运算,第四相关处理是按照广播信道的资源映射方式,从每个信息块中取出一个信息位组成一个码字,将该码字与至少一个子序列作相关运算。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.
如图14所示,本发明实施例第二种发送广播信道的网络侧设备包括:处理器1410和发射器1420。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 .
处理器1410,用于确定时间段中需要承载广播信道的无线帧,并将确定的无线帧通知给发射器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;
发射器1420,用于对广播信道中承载的信息进行扩频处理后,在处理器1410通知的无线帧上向用户设备发送广播信道。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.
较佳地,处理器1410还用于:Preferably, the processor 1410 is also used for:
针对一个时间段,根据时间段和无线帧的对应关系,将该时间段对应无线帧作为该时间段中需要承载广播信道的无线帧。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.
较佳地,发射器1420具体用于:Preferably, the transmitter 1420 is specifically used for:
采用时间段对应的特定序列对广播信道中承载的信息进行扩频处理,在处理器1410通知的无线帧上,向用户设备发送采用确定的无线帧所在的时间段对应的特定序列进行扩频后的广播信道中承载的信息;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;
其中,周期内的每个时间段对应不同的特定序列。Wherein, each time period in the cycle corresponds to a different specific sequence.
较佳地,发射器1420具体用于:Preferably, the transmitter 1420 is specifically used for:
采用时间段对应的特定序列对广播信道中承载的信息进行扩频处理;Spread spectrum processing is performed on the information carried in the broadcast channel by using a specific sequence corresponding to the time period;
其中,周期内的每个时间段对应相同的特定序列。Wherein, each time period in the cycle corresponds to the same specific sequence.
较佳地,广播信道中承载的信息包括采用用于指示需要承载广播信道的无线帧所在的时间段的特定扰码加扰的CRC。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.
较佳地,发射器1420具体用于:Preferably, the transmitter 1420 is specifically used for:
在对原始信息流进行信道编码之后,在对广播信道进行资源映射之前,对广播信道上承载的信息进行扩频处理;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;
其中,原始信息流是指承载在广播信道上的原始信息后面添加CRC后形成的信息流。Wherein, the original information flow refers to the information flow formed by adding CRC after the original information carried on the broadcast channel.
较佳地,发射器1420具体用于:Preferably, the transmitter 1420 is specifically used for:
将广播信道上承载的信息中的每一个信息位依次与特定序列相乘或模2加;或multiplying or modulo-2 adding each information bit in the information carried on the broadcast channel with a specific sequence in turn; or
将广播信道上承载的信息依次与特定序列中的每一位相乘或模2加;或Multiply or add modulo 2 the information carried on the broadcast channel to each bit in the specified sequence in turn; or
按照特定序列中每段子序列的顺序,将广播信道上承载的信息与每个子序列进行第一乘积处理或第二乘积处理;其中,第一乘积处理是将广播信道上承载的信息中的每一个信息位依次与子序列相乘或模2加;第二乘积处理是将广播信道上承载的信息依次与子序列中的每一位相乘或模2加。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.
如图15所示,本发明实施例第二种接收广播信道的用户设备包括:As shown in Figure 15, the second type of user equipment for receiving broadcast channels in the embodiment of the present invention includes:
处理器1510,用于以当前无线帧的起点时刻接收广播信道,并对广播信道中承载的信息进行检测,在检测到信息后,通知接收器1520;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;
接收器1520,用于在接收到处理器1510的通知后,对检测到的广播信道中承载的信息进行解扩频处理。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 .
较佳地,接收器1520具体用于:Preferably, the receiver 1520 is specifically used for:
根据时间段和无线帧的对应关系,确定检测到广播信道的时间段对应的无线帧为承载广播信道的无线帧;根据承载广播信道的无线帧和承载广播信道的无线帧所属的时间段,确定系统帧号。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.
较佳地,接收器1520具体用于:Preferably, the receiver 1520 is specifically used for:
根据时间段和特定序列的对应关系,确定对检测到的广播信道中承载的信息进行解扩频处理时,采用的特定序列对应的时间段为承载广播信道的无线帧所属的时间段。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.
较佳地,接收器1520具体用于:Preferably, the receiver 1520 is specifically used for:
根据对检测到的广播信道中承载的信息中的CRC上加扰的用于指示需要承载广播信道的无线帧所在的时间段的特定扰码,确定承载广播信道的无线帧所属的时间段。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.
较佳地,接收器1520还用于:Preferably, the receiver 1520 is also used for:
在进行资源解映射之后,进行信道译码之前,采用特定序列对广播信道上承载的信息进行解扩频处理。After resource demapping and before channel decoding, a specific sequence is used to despread the information carried on the broadcast channel.
较佳地,接收器1520还用于:Preferably, the receiver 1520 is also used for:
以当前无线帧的起点时刻开始,按照广播信道的资源映射方式接收广播信道;将当前接收窗内的广播信道中的至少一个码字与每个特定序列进行相关运算,确定与每个特定序列对应的相关值;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;
若一个码字分别与每个特定序列进行相关运算,从大于设定门限值的相关值中选择最大的前N个相关值对应的特定序列作为进行解扩频处理时采用的特定序列,N为正整数;在确定的所有相关值中没有大于设定门限值的相关值时,将下一接收窗作为当前接收窗,并返回将当前接收窗内的广播信道中的至少一个码字与每个特定序列进行相关运算,确定每个特定序列对应的相关值的步骤;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;
若多个码字分别与每个特定序列进行相关运算,从大于设定门限值的相关值中选择相关值最大的前M次相关值对应的特定序列作为进行解扩频处理时采用的特定序列,M为正整数;在确定的所有相关值中没有大于设定门限值的相关值时,将下一接收窗作为当前接收窗,并返回将当前接收窗内的广播信道中的至少一个码字与每个特定序列进行相关运算,确定每个特定序列对应的相关值的步骤;其中,一个码字分别与每个特定序列进行相关运算,得到的每个特定序列对应的相关值中相关值最大的特定序列为一次相关值最大的特定序列。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.
可选地,当用户设备仅用一个码字和每个特定序列作相关运算时,如果存在多个相关值大于设定门限的情况,将这些相关值从大到小依次排序,并选择前若干个相关值对应的特定序列组成一个特定序列组,并将该特定序列组中的每个特定序列作为进行解扩频处理时采用的候选特定序列。或者当用户设备使用多个码字分别与每个特定序列进行相关运算,将相关值为最大相关值时的次数按从大到小进行排序,并选择出大于设定门限的相关值,然后从中选择前若干个相关值对应的特定序列组成一个特定序列组,并将该特定序列组中的每个特定序列作为进行解扩频处理时采用的候选特定序列。选择的个数和UE的实现复杂度有关系,选择的越多,用户设备实现越复杂,但是检测到广播信道的准确性更高,可以防止广播信道漏检的现象。选择出的前若干个相关值,虽然这些相关值都超过了门限,但是发送端仅采用了一个特定序列进行的扩频,该特定序列只可能是该特定序列组中的一个特定序列。用户设备可以从特定序列组中依次选取一个特定序列作为进行解扩频处理时采用的特定序列,并进行译码,以及CRC校验。如果CRC校验成功,说明广播信道已经成功检测到,且不再使用特定序列组中的其他特定序列进行解扩频,译码,以及CRC校验;如果CRC校验失败,则按特定序列组中特定序列的顺序选择下一次特定序列作为解扩频处理时采用的特定序列,并进行译码,以及CRC校验,并判断CRC校验是否成功。不断重复该过程,直到CRC校验成功。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.
较佳地,接收器1520具体用于:Preferably, the receiver 1520 is specifically used for:
直接将一个码字与一个特定序列作相关运算;或按照广播信道的资源映射方式,从每个信息块中取出一个信息位组成一个码字,将该码字与每个特定序列作相关运算;或按照一个特定序列中每段子序列的顺序,将一个码子与至少一个子序列进行第三相关处理或第四相关处理;其中,第三相关处理是将一个码字直接与至少一个子序列作相关运算,第四相关处理是按照广播信道的资源映射方式,从每个信息块中取出一个信息位组成一个码字,将该码字与至少一个子序列作相关运算。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.
本领域内的技术人员应明白,本发明的实施例可提供为方法、系统、或计算机程序产品。因此,本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。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.
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。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.
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。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.
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。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.
尽管已描述了本发明的优选实施例,但本领域内的技术人员一旦得知了基本创造性概念,则可对这些实施例作出另外的变更和修改。所以,所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。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.
显然,本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变型在内。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.
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